diff options
Diffstat (limited to 'src/lib/JEDI-SDL/SDL/Pas/sdli386utils.pas')
| -rw-r--r-- | src/lib/JEDI-SDL/SDL/Pas/sdli386utils.pas | 5236 |
1 files changed, 5236 insertions, 0 deletions
diff --git a/src/lib/JEDI-SDL/SDL/Pas/sdli386utils.pas b/src/lib/JEDI-SDL/SDL/Pas/sdli386utils.pas new file mode 100644 index 00000000..4de4ebee --- /dev/null +++ b/src/lib/JEDI-SDL/SDL/Pas/sdli386utils.pas @@ -0,0 +1,5236 @@ +unit sdli386utils; +{ + $Id: sdli386utils.pas,v 1.5 2004/06/02 19:38:53 savage Exp $ + +} +{******************************************************************************} +{ } +{ Borland Delphi SDL - Simple DirectMedia Layer } +{ SDL Utility functions } +{ } +{ } +{ The initial developer of this Pascal code was : } +{ Tom Jones <tigertomjones@gmx.de> } +{ } +{ Portions created by Tom Jones are } +{ Copyright (C) 2000 - 2001 Tom Jones. } +{ } +{ } +{ Contributor(s) } +{ -------------- } +{ Dominique Louis <Dominique@SavageSoftware.com.au> } +{ Róbert Kisnémeth <mikrobi@freemail.hu> } +{ } +{ Obtained through: } +{ Joint Endeavour of Delphi Innovators ( Project JEDI ) } +{ } +{ You may retrieve the latest version of this file at the Project } +{ JEDI home page, located at http://delphi-jedi.org } +{ } +{ The contents of this file are used with permission, subject to } +{ the Mozilla Public License Version 1.1 (the "License"); you may } +{ not use this file except in compliance with the License. You may } +{ obtain a copy of the License at } +{ http://www.mozilla.org/MPL/MPL-1.1.html } +{ } +{ Software distributed under the License is distributed on an } +{ "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or } +{ implied. See the License for the specific language governing } +{ rights and limitations under the License. } +{ } +{ Description } +{ ----------- } +{ Helper functions... } +{ } +{ } +{ Requires } +{ -------- } +{ SDL.dll on Windows platforms } +{ libSDL-1.1.so.0 on Linux platform } +{ } +{ Programming Notes } +{ ----------------- } +{ } +{ } +{ } +{ } +{ Revision History } +{ ---------------- } +{ 2000 - TJ : Initial creation } +{ } +{ July 13 2001 - DL : Added PutPixel and GetPixel routines. } +{ } +{ Sept 14 2001 - RK : Added flipping routines. } +{ } +{ Sept 19 2001 - RK : Added PutPixel & line drawing & blitting with ADD } +{ effect. Fixed a bug in SDL_PutPixel & SDL_GetPixel } +{ Added PSDLRect() } +{ Sept 22 2001 - DL : Removed need for Windows.pas by defining types here} +{ Also removed by poor attempt or a dialog box } +{ } +{ Sept 25 2001 - RK : Added PixelTest, NewPutPixel, SubPixel, SubLine, } +{ SubSurface, MonoSurface & TexturedSurface } +{ } +{ Sept 26 2001 - DL : Made change so that it refers to native Pascal } +{ types rather that Windows types. This makes it more} +{ portable to Linix. } +{ } +{ Sept 27 2001 - RK : SDLUtils now can be compiled with FreePascal } +{ } +{ Oct 27 2001 - JF : Added ScrollY function } +{ } +{ Jan 21 2002 - RK : Added SDL_ZoomSurface and SDL_WarpSurface } +{ } +{ Mar 28 2002 - JF : Added SDL_RotateSurface } +{ } +{ May 13 2002 - RK : Improved SDL_FillRectAdd & SDL_FillRectSub } +{ } +{ May 27 2002 - YS : GradientFillRect function } +{ } +{ May 30 2002 - RK : Added SDL_2xBlit, SDL_Scanline2xBlit } +{ & SDL_50Scanline2xBlit } +{ } +{ June 12 2002 - RK : Added SDL_PixelTestSurfaceVsRect } +{ } +{ June 12 2002 - JF : Updated SDL_PixelTestSurfaceVsRect } +{ } +{ November 9 2002 - JF : Added Jason's boolean Surface functions } +{ } +{ December 10 2002 - DE : Added Dean's SDL_ClipLine function } +{ } +{******************************************************************************} +{ + $Log: sdli386utils.pas,v $ + Revision 1.5 2004/06/02 19:38:53 savage + Changes to SDL_GradientFillRect as suggested by + Ángel Eduardo García Hernández. Many thanks. + + Revision 1.4 2004/05/29 23:11:53 savage + Changes to SDL_ScaleSurfaceRect as suggested by + Ángel Eduardo García Hernández to fix a colour issue with the function. Many thanks. + + Revision 1.3 2004/02/20 22:04:11 savage + Added Changes as mentioned by Rodrigo "Rui" R. (1/2 RRC2Soft) to facilitate FPC compilation and it also works in Delphi. Also syncronized the funcitons so that they are identical to sdlutils.pas, when no assembly version is available. + + Revision 1.2 2004/02/14 00:23:39 savage + As UNIX is defined in jedi-sdl.inc this will be used to check linux compatability as well. Units have been changed to reflect this change. + + Revision 1.1 2004/02/05 00:08:20 savage + Module 1.0 release + + +} + +interface + +{$i jedi-sdl.inc} + +uses +{$IFDEF UNIX} + Types, + Xlib, +{$ENDIF} + SysUtils, + sdl; + +type + TGradientStyle = ( gsHorizontal, gsVertical ); + + // Pixel procedures +function SDL_PixelTest( SrcSurface1 : PSDL_Surface; SrcRect1 : PSDL_Rect; SrcSurface2 : + PSDL_Surface; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) : Boolean; + +function SDL_GetPixel( SrcSurface : PSDL_Surface; x : cardinal; y : cardinal ) : Uint32; + +procedure SDL_PutPixel( SrcSurface : PSDL_Surface; x : integer; y : integer; Color : + cardinal ); + +procedure SDL_AddPixel( SrcSurface : PSDL_Surface; x : integer; y : integer; Color : + cardinal ); + +procedure SDL_SubPixel( SrcSurface : PSDL_Surface; x : integer; y : integer; Color : + cardinal ); + +// Line procedures +procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal );overload; + +procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal ; DashLength, DashSpace : byte ); overload; + +procedure SDL_AddLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal ); + +procedure SDL_SubLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal ); + +// Surface procedures +procedure SDL_AddSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect ); + +procedure SDL_SubSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect ); + +procedure SDL_MonoSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect; Color : cardinal ); + +procedure SDL_TexturedSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect; Texture : PSDL_Surface; + TextureRect : PSDL_Rect ); + +procedure SDL_ZoomSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; DstRect : PSDL_Rect ); + +procedure SDL_WarpSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; UL, UR, LR, LL : PPoint ); + +// Flip procedures +procedure SDL_FlipRectH( DstSurface : PSDL_Surface; Rect : PSDL_Rect ); + +procedure SDL_FlipRectV( DstSurface : PSDL_Surface; Rect : PSDL_Rect ); + +function PSDLRect( aLeft, aTop, aWidth, aHeight : integer ) : PSDL_Rect; + +function SDLRect( aLeft, aTop, aWidth, aHeight : integer ) : TSDL_Rect; overload; + +function SDLRect( aRect : TRect ) : TSDL_Rect; overload; + +function SDL_ScaleSurfaceRect( SrcSurface : PSDL_Surface; SrcX1, SrcY1, SrcW, SrcH, + Width, Height : integer ) : PSDL_Surface; + +procedure SDL_ScrollY( DstSurface : PSDL_Surface; DifY : integer ); + +procedure SDL_ScrollX( DstSurface : PSDL_Surface; DifX : integer ); + +procedure SDL_RotateDeg( DstSurface, SrcSurface : PSDL_Surface; SrcRect : + PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Integer ); + +procedure SDL_RotateRad( DstSurface, SrcSurface : PSDL_Surface; SrcRect : + PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Single ); + +function ValidateSurfaceRect( DstSurface : PSDL_Surface; dstrect : PSDL_Rect ) : TSDL_Rect; + +// Fill Rect routine +procedure SDL_FillRectAdd( DstSurface : PSDL_Surface; dstrect : PSDL_Rect; color : UInt32 ); + +procedure SDL_FillRectSub( DstSurface : PSDL_Surface; dstrect : PSDL_Rect; color : UInt32 ); + +procedure SDL_GradientFillRect( DstSurface : PSDL_Surface; const Rect : PSDL_Rect; const StartColor, EndColor : TSDL_Color; const Style : TGradientStyle ); + +// NOTE for All SDL_2xblit... function : the dest surface must be 2x of the source surface! +procedure SDL_2xBlit( Src, Dest : PSDL_Surface ); + +procedure SDL_Scanline2xBlit( Src, Dest : PSDL_Surface ); + +procedure SDL_50Scanline2xBlit( Src, Dest : PSDL_Surface ); + +function SDL_PixelTestSurfaceVsRect( SrcSurface1 : PSDL_Surface; SrcRect1 : +PSDL_Rect; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) : +boolean; + +// Jason's boolean Surface functions +procedure SDL_ORSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); + +procedure SDL_ANDSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); + +procedure SDL_GTSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); + +procedure SDL_LTSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); + +function SDL_ClipLine(var x1,y1,x2,y2: Integer; ClipRect: PSDL_Rect) : boolean; + +implementation + +uses + Math; + +function SDL_PixelTest( SrcSurface1 : PSDL_Surface; SrcRect1 : PSDL_Rect; SrcSurface2 : + PSDL_Surface; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) : boolean; +var + Src_Rect1, Src_Rect2 : TSDL_Rect; + right1, bottom1 : integer; + right2, bottom2 : integer; + Scan1Start, Scan2Start, ScanWidth, ScanHeight : cardinal; + Mod1, Mod2 : cardinal; + Addr1, Addr2 : cardinal; + BPP : cardinal; + Pitch1, Pitch2 : cardinal; + TransparentColor1, TransparentColor2 : cardinal; + tx, ty : cardinal; + StartTick : cardinal; + Color1, Color2 : cardinal; +begin + Result := false; + if SrcRect1 = nil then + begin + with Src_Rect1 do + begin + x := 0; + y := 0; + w := SrcSurface1.w; + h := SrcSurface1.h; + end; + end + else + Src_Rect1 := SrcRect1^; + if SrcRect2 = nil then + begin + with Src_Rect2 do + begin + x := 0; + y := 0; + w := SrcSurface2.w; + h := SrcSurface2.h; + end; + end + else + Src_Rect2 := SrcRect2^; + with Src_Rect1 do + begin + Right1 := Left1 + w; + Bottom1 := Top1 + h; + end; + with Src_Rect2 do + begin + Right2 := Left2 + w; + Bottom2 := Top2 + h; + end; + if ( Left1 >= Right2 ) or ( Right1 <= Left2 ) or ( Top1 >= Bottom2 ) or ( Bottom1 <= + Top2 ) then + exit; + if Left1 <= Left2 then + begin + // 1. left, 2. right + Scan1Start := Src_Rect1.x + Left2 - Left1; + Scan2Start := Src_Rect2.x; + ScanWidth := Right1 - Left2; + with Src_Rect2 do + if ScanWidth > w then + ScanWidth := w; + end + else + begin + // 1. right, 2. left + Scan1Start := Src_Rect1.x; + Scan2Start := Src_Rect2.x + Left1 - Left2; + ScanWidth := Right2 - Left1; + with Src_Rect1 do + if ScanWidth > w then + ScanWidth := w; + end; + with SrcSurface1^ do + begin + Pitch1 := Pitch; + Addr1 := cardinal( Pixels ); + inc( Addr1, Pitch1 * UInt32( Src_Rect1.y ) ); + with format^ do + begin + BPP := BytesPerPixel; + TransparentColor1 := colorkey; + end; + end; + with SrcSurface2^ do + begin + TransparentColor2 := format.colorkey; + Pitch2 := Pitch; + Addr2 := cardinal( Pixels ); + inc( Addr2, Pitch2 * UInt32( Src_Rect2.y ) ); + end; + Mod1 := Pitch1 - ( ScanWidth * BPP ); + Mod2 := Pitch2 - ( ScanWidth * BPP ); + inc( Addr1, BPP * Scan1Start ); + inc( Addr2, BPP * Scan2Start ); + if Top1 <= Top2 then + begin + // 1. up, 2. down + ScanHeight := Bottom1 - Top2; + if ScanHeight > Src_Rect2.h then + ScanHeight := Src_Rect2.h; + inc( Addr1, Pitch1 * UInt32( Top2 - Top1 ) ); + end + else + begin + // 1. down, 2. up + ScanHeight := Bottom2 - Top1; + if ScanHeight > Src_Rect1.h then + ScanHeight := Src_Rect1.h; + inc( Addr2, Pitch2 * UInt32( Top1 - Top2 ) ); + end; + case BPP of + 1 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + if ( PByte( Addr1 )^ <> TransparentColor1 ) and ( PByte( Addr2 )^ <> + TransparentColor2 ) then + begin + Result := true; + exit; + end; + inc( Addr1 ); + inc( Addr2 ); + end; + inc( Addr1, Mod1 ); + inc( Addr2, Mod2 ); + end; + 2 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + if ( PWord( Addr1 )^ <> TransparentColor1 ) and ( PWord( Addr2 )^ <> + TransparentColor2 ) then + begin + Result := true; + exit; + end; + inc( Addr1, 2 ); + inc( Addr2, 2 ); + end; + inc( Addr1, Mod1 ); + inc( Addr2, Mod2 ); + end; + 3 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + Color1 := PLongWord( Addr1 )^ and $00FFFFFF; + Color2 := PLongWord( Addr2 )^ and $00FFFFFF; + if ( Color1 <> TransparentColor1 ) and ( Color2 <> TransparentColor2 ) + then + begin + Result := true; + exit; + end; + inc( Addr1, 3 ); + inc( Addr2, 3 ); + end; + inc( Addr1, Mod1 ); + inc( Addr2, Mod2 ); + end; + 4 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + if ( PLongWord( Addr1 )^ <> TransparentColor1 ) and ( PLongWord( Addr2 )^ <> + TransparentColor2 ) then + begin + Result := true; + exit; + end; + inc( Addr1, 4 ); + inc( Addr2, 4 ); + end; + inc( Addr1, Mod1 ); + inc( Addr2, Mod2 ); + end; + end; +end; + +function SDL_GetPixel( SrcSurface : PSDL_Surface; x : cardinal; y : cardinal ) : Uint32; +var + bpp : UInt32; + p : PInteger; +begin + bpp := SrcSurface.format.BytesPerPixel; + // Here p is the address to the pixel we want to retrieve + p := Pointer( Uint32( SrcSurface.pixels ) + UInt32( y ) * SrcSurface.pitch + UInt32( x ) * + bpp ); + case bpp of + 1 : result := PUint8( p )^; + 2 : result := PUint16( p )^; + 3 : + if ( SDL_BYTEORDER = SDL_BIG_ENDIAN ) then + result := PUInt8Array( p )[ 0 ] shl 16 or PUInt8Array( p )[ 1 ] shl 8 or + PUInt8Array( p )[ 2 ] + else + result := PUInt8Array( p )[ 0 ] or PUInt8Array( p )[ 1 ] shl 8 or + PUInt8Array( p )[ 2 ] shl 16; + 4 : result := PUint32( p )^; + else + result := 0; // shouldn't happen, but avoids warnings + end; +end; + +procedure SDL_PutPixel( SrcSurface : PSDL_Surface; x : integer; y : integer; Color : + cardinal ); +var + Addr, Pitch, BPP : cardinal; +begin + Addr := cardinal( SrcSurface.Pixels ); + Pitch := SrcSurface.Pitch; + BPP := SrcSurface.format.BytesPerPixel; + asm + mov eax, y + mul Pitch // EAX := y * Pitch + add Addr, eax // Addr:= Addr + (y * Pitch) + mov eax, x + mov ecx, Color + cmp BPP, 1 + jne @Not1BPP + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x + mov [eax], cl + jmp @Quit + @Not1BPP: + cmp BPP, 2 + jne @Not2BPP + mul BPP // EAX := x * BPP + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x * BPP + mov [eax], cx + jmp @Quit + @Not2BPP: + cmp BPP, 3 + jne @Not3BPP + mul BPP // EAX := x * BPP + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x * BPP + mov edx, [eax] + and edx, $ff000000 + or edx, ecx + mov [eax], edx + jmp @Quit + @Not3BPP: + mul BPP // EAX := x * BPP + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x * BPP + mov [eax], ecx + @Quit: + end; +end; + +procedure SDL_AddPixel( SrcSurface : PSDL_Surface; x : integer; y : integer; Color : + cardinal ); +var + SrcColor, FinalColor : cardinal; + Addr, Pitch, Bits : cardinal; +begin + if Color = 0 then + exit; + Addr := cardinal( SrcSurface.Pixels ); + Pitch := SrcSurface.Pitch; + Bits := SrcSurface.format.BitsPerPixel; + asm + mov eax, y + mul Pitch // EAX := y * Pitch + add Addr, eax // Addr:= Addr + (y * Pitch) + mov eax, x + cmp Bits, 8 + jne @Not8bit + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x + mov cl, [eax] + movzx ecx, cl + mov SrcColor, ecx + mov edx, Color + and ecx, 3 + and edx, 3 + add ecx, edx + cmp ecx, 3 + jbe @Skip1_8bit + mov ecx, 3 + @Skip1_8bit: + mov FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $1c + and edx, $1c + add ecx, edx + cmp ecx, $1c + jbe @Skip2_8bit + mov ecx, $1c + @Skip2_8bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $e0 + and edx, $e0 + add ecx, edx + cmp ecx, $e0 + jbe @Skip3_8bit + mov ecx, $e0 + @Skip3_8bit: + or ecx, FinalColor + mov [eax], cl + jmp @Quit + @Not8bit: + cmp Bits, 15 + jne @Not15bit + shl eax, 1 + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x * 2 + mov ecx, [eax] + and ecx, $00007fff + mov SrcColor, ecx + mov edx, Color + and ecx, $1f + and edx, $1f + add ecx, edx + cmp ecx, $1f + jbe @Skip1_15bit + mov ecx, $1f + @Skip1_15bit: + mov FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $03e0 + and edx, $03e0 + add ecx, edx + cmp ecx, $03e0 + jbe @Skip2_15bit + mov ecx, $03e0 + @Skip2_15bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $7c00 + and edx, $7c00 + add ecx, edx + cmp ecx, $7c00 + jbe @Skip3_15bit + mov ecx, $7c00 + @Skip3_15bit: + or ecx, FinalColor + mov [eax], cx + jmp @Quit + @Not15Bit: + cmp Bits, 16 + jne @Not16bit + shl eax, 1 + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x * 2 + mov ecx, [eax] + and ecx, $0000ffff + mov SrcColor, ecx + mov edx, Color + and ecx, $1f + and edx, $1f + add ecx, edx + cmp ecx, $1f + jbe @Skip1_16bit + mov ecx, $1f + @Skip1_16bit: + mov FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $07e0 + and edx, $07e0 + add ecx, edx + cmp ecx, $07e0 + jbe @Skip2_16bit + mov ecx, $07e0 + @Skip2_16bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $f800 + and edx, $f800 + add ecx, edx + cmp ecx, $f800 + jbe @Skip3_16bit + mov ecx, $f800 + @Skip3_16bit: + or ecx, FinalColor + mov [eax], cx + jmp @Quit + @Not16Bit: + cmp Bits, 24 + jne @Not24bit + mov ecx, 0 + add ecx, eax + shl ecx, 1 + add ecx, eax + mov eax, ecx + jmp @32bit + @Not24bit: + shl eax, 2 + @32bit: + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x * 2 + mov ecx, [eax] + mov FinalColor, ecx + and FinalColor, $ff000000 + and ecx, $00ffffff + mov SrcColor, ecx + mov edx, Color + and ecx, $000000ff + and edx, $000000ff + add ecx, edx + cmp ecx, $000000ff + jbe @Skip1_32bit + mov ecx, $000000ff + @Skip1_32bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $0000ff00 + and edx, $0000ff00 + add ecx, edx + cmp ecx, $0000ff00 + jbe @Skip2_32bit + mov ecx, $0000ff00 + @Skip2_32bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $00ff0000 + and edx, $00ff0000 + add ecx, edx + cmp ecx, $00ff0000 + jbe @Skip3_32bit + mov ecx, $00ff0000 + @Skip3_32bit: + or ecx, FinalColor + mov [eax], ecx + @Quit: + end; +end; + +procedure SDL_SubPixel( SrcSurface : PSDL_Surface; x : integer; y : integer; Color : + cardinal ); +var + SrcColor, FinalColor : cardinal; + Addr, Pitch, Bits : cardinal; +begin + if Color = 0 then + exit; + Addr := cardinal( SrcSurface.Pixels ); + Pitch := SrcSurface.Pitch; + Bits := SrcSurface.format.BitsPerPixel; + asm + mov eax, y + mul Pitch // EAX := y * Pitch + add Addr, eax // Addr:= Addr + (y * Pitch) + mov eax, x + cmp Bits, 8 + jne @Not8bit + add eax, Addr // Now: EAX:= Addr + (y * Pitch) + x + mov cl, [eax] + movzx ecx, cl + mov SrcColor, ecx + mov edx, Color + and ecx, 3 + and edx, 3 + sub ecx, edx + jns @Skip1_8bit + mov ecx, 0 + @Skip1_8bit: + mov FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $1c + and edx, $1c + sub ecx, edx + jns @Skip2_8bit + mov ecx, 0 + @Skip2_8bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $e0 + and edx, $e0 + sub ecx, edx + jns @Skip3_8bit + mov ecx, 0 + @Skip3_8bit: + or ecx, FinalColor + mov [eax], cl + jmp @Quit + @Not8bit: + cmp Bits, 15 + jne @Not15bit + shl eax, 1 + add eax, Addr + mov ecx, [eax] + and ecx, $00007fff + mov SrcColor, ecx + mov edx, Color + and ecx, $1f + and edx, $1f + sub ecx, edx + jns @Skip1_15bit + mov ecx, 0 + @Skip1_15bit: + mov FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $03e0 + and edx, $03e0 + sub ecx, edx + jns @Skip2_15bit + mov ecx, 0 + @Skip2_15bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $7c00 + and edx, $7c00 + sub ecx, edx + jns @Skip3_15bit + mov ecx, 0 + @Skip3_15bit: + or ecx, FinalColor + mov [eax], cx + jmp @Quit + @Not15Bit: + cmp Bits, 16 + jne @Not16bit + shl eax, 1 + add eax, Addr + mov ecx, [eax] + and ecx, $0000ffff + mov SrcColor, ecx + mov edx, Color + and ecx, $1f + and edx, $1f + sub ecx, edx + jns @Skip1_16bit + mov ecx, 0 + @Skip1_16bit: + mov FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $07e0 + and edx, $07e0 + sub ecx, edx + jns @Skip2_16bit + mov ecx, 0 + @Skip2_16bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $f800 + and edx, $f800 + sub ecx, edx + jns @Skip3_16bit + mov ecx, 0 + @Skip3_16bit: + or ecx, FinalColor + mov [eax], cx + jmp @Quit + @Not16Bit: + cmp Bits, 24 + jne @Not24bit + mov ecx, 0 + add ecx, eax + shl ecx, 1 + add ecx, eax + mov eax, ecx + jmp @32bit + @Not24bit: + shl eax, 2 + @32bit: + add eax, Addr + mov ecx, [eax] + mov FinalColor, ecx + and FinalColor, $ff000000 + and ecx, $00ffffff + mov SrcColor, ecx + mov edx, Color + and ecx, $000000ff + and edx, $000000ff + sub ecx, edx + jns @Skip1_32bit + mov ecx, 0 + @Skip1_32bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $0000ff00 + and edx, $0000ff00 + sub ecx, edx + jns @Skip2_32bit + mov ecx, 0 + @Skip2_32bit: + or FinalColor, ecx + mov ecx, SrcColor + mov edx, Color + and ecx, $00ff0000 + and edx, $00ff0000 + sub ecx, edx + jns @Skip3_32bit + mov ecx, 0 + @Skip3_32bit: + or ecx, FinalColor + mov [eax], ecx + @Quit: + end; +end; + +// Draw a line between x1,y1 and x2,y2 to the given surface +// NOTE: The surface must be locked before calling this! +procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal ); +var + dx, dy, sdx, sdy, x, y, px, py : integer; +begin + dx := x2 - x1; + dy := y2 - y1; + if dx < 0 then + sdx := -1 + else + sdx := 1; + if dy < 0 then + sdy := -1 + else + sdy := 1; + dx := sdx * dx + 1; + dy := sdy * dy + 1; + x := 0; + y := 0; + px := x1; + py := y1; + if dx >= dy then + begin + for x := 0 to dx - 1 do + begin + SDL_PutPixel( DstSurface, px, py, Color ); + y := y + dy; + if y >= dx then + begin + y := y - dx; + py := py + sdy; + end; + px := px + sdx; + end; + end + else + begin + for y := 0 to dy - 1 do + begin + SDL_PutPixel( DstSurface, px, py, Color ); + x := x + dx; + if x >= dy then + begin + x := x - dy; + px := px + sdx; + end; + py := py + sdy; + end; + end; +end; + +// Draw a dashed line between x1,y1 and x2,y2 to the given surface +// NOTE: The surface must be locked before calling this! +procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal ; DashLength, DashSpace : byte ); overload; +var + dx, dy, sdx, sdy, x, y, px, py, counter : integer; drawdash : boolean; +begin + counter := 0; + drawdash := true; //begin line drawing with dash + + //Avoid invalid user-passed dash parameters + if (DashLength < 1) + then DashLength := 1; + if (DashSpace < 1) + then DashSpace := 0; + + dx := x2 - x1; + dy := y2 - y1; + if dx < 0 then + sdx := -1 + else + sdx := 1; + if dy < 0 then + sdy := -1 + else + sdy := 1; + dx := sdx * dx + 1; + dy := sdy * dy + 1; + x := 0; + y := 0; + px := x1; + py := y1; + if dx >= dy then + begin + for x := 0 to dx - 1 do + begin + + //Alternate drawing dashes, or leaving spaces + if drawdash then + begin + SDL_PutPixel( DstSurface, px, py, Color ); + inc(counter); + if (counter > DashLength-1) and (DashSpace > 0) then + begin + drawdash := false; + counter := 0; + end; + end + else //space + begin + inc(counter); + if counter > DashSpace-1 then + begin + drawdash := true; + counter := 0; + end; + end; + + y := y + dy; + if y >= dx then + begin + y := y - dx; + py := py + sdy; + end; + px := px + sdx; + end; + end + else + begin + for y := 0 to dy - 1 do + begin + + //Alternate drawing dashes, or leaving spaces + if drawdash then + begin + SDL_PutPixel( DstSurface, px, py, Color ); + inc(counter); + if (counter > DashLength-1) and (DashSpace > 0) then + begin + drawdash := false; + counter := 0; + end; + end + else //space + begin + inc(counter); + if counter > DashSpace-1 then + begin + drawdash := true; + counter := 0; + end; + end; + + x := x + dx; + if x >= dy then + begin + x := x - dy; + px := px + sdx; + end; + py := py + sdy; + end; + end; +end; + +procedure SDL_AddLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal ); +var + dx, dy, sdx, sdy, x, y, px, py : integer; +begin + dx := x2 - x1; + dy := y2 - y1; + if dx < 0 then + sdx := -1 + else + sdx := 1; + if dy < 0 then + sdy := -1 + else + sdy := 1; + dx := sdx * dx + 1; + dy := sdy * dy + 1; + x := 0; + y := 0; + px := x1; + py := y1; + if dx >= dy then + begin + for x := 0 to dx - 1 do + begin + SDL_AddPixel( DstSurface, px, py, Color ); + y := y + dy; + if y >= dx then + begin + y := y - dx; + py := py + sdy; + end; + px := px + sdx; + end; + end + else + begin + for y := 0 to dy - 1 do + begin + SDL_AddPixel( DstSurface, px, py, Color ); + x := x + dx; + if x >= dy then + begin + x := x - dy; + px := px + sdx; + end; + py := py + sdy; + end; + end; +end; + +procedure SDL_SubLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color : + cardinal ); +var + dx, dy, sdx, sdy, x, y, px, py : integer; +begin + dx := x2 - x1; + dy := y2 - y1; + if dx < 0 then + sdx := -1 + else + sdx := 1; + if dy < 0 then + sdy := -1 + else + sdy := 1; + dx := sdx * dx + 1; + dy := sdy * dy + 1; + x := 0; + y := 0; + px := x1; + py := y1; + if dx >= dy then + begin + for x := 0 to dx - 1 do + begin + SDL_SubPixel( DstSurface, px, py, Color ); + y := y + dy; + if y >= dx then + begin + y := y - dx; + py := py + sdy; + end; + px := px + sdx; + end; + end + else + begin + for y := 0 to dy - 1 do + begin + SDL_SubPixel( DstSurface, px, py, Color ); + x := x + dx; + if x >= dy then + begin + x := x - dy; + px := px + sdx; + end; + py := py + sdy; + end; + end; +end; + +// This procedure works on 8, 15, 16, 24 and 32 bits color depth surfaces. +// In 8 bit color depth mode the procedure works with the default packed +// palette (RRRGGGBB). It handles all clipping. +procedure SDL_AddSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect ); +var + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr : cardinal; + // TransparentColor: cardinal; + _ebx, _esi, _edi, _esp : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DstSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DstSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DstSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + // TransparentColor := format.ColorKey; + end; + with DstSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := Format.BitsPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DstSurface ); + case bits of + 8 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov al, [esi] // AL := source color + cmp al, 0 + je @SkipColor // if AL=0 or AL=transparent color then skip everything + mov esp, eax // ESP - source color + mov bl, [edi] // BL := destination color + mov dl, bl // DL := destination color + and ax, $03 // Adding BLUE + and bl, $03 + add al, bl + cmp al, $03 + jbe @Skip1 + mov al, $03 + @Skip1: + mov cl, al + mov eax, esp // Adding GREEN + mov bl, dl + and al, $1c + and bl, $1c + add al, bl + cmp al, $1c + jbe @Skip2 + mov al, $1c + @Skip2: + or cl, al + mov eax, esp // Adding RED + mov bl, dl + and ax, $e0 + and bx, $e0 + add ax, bx + cmp ax, $e0 + jbe @Skip3 + mov al, $e0 + @Skip3: + or cl, al + mov [edi], cl + @SkipColor: + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 15 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + mov esp, eax // ESP - source color + mov bx, [edi] // BX := destination color + mov dx, bx // DX := destination color + and ax, $001F // Adding BLUE + and bx, $001F + add ax, bx + cmp ax, $001F + jbe @Skip1 + mov ax, $001F + @Skip1: + mov cx, ax + mov eax, esp // Adding GREEN + mov bx, dx + and ax, $3E0 + and bx, $3E0 + add ax, bx + cmp ax, $3E0 + jbe @Skip2 + mov ax, $3E0 + @Skip2: + or cx, ax + mov eax, esp // Adding RED + mov bx, dx + and ax, $7C00 + and bx, $7C00 + add ax, bx + cmp ax, $7C00 + jbe @Skip3 + mov ax, $7C00 + @Skip3: + or cx, ax + mov [edi], cx + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 16 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + mov esp, eax // ESP - source color + mov bx, [edi] // BX := destination color + mov dx, bx // DX := destination color + and ax, $1F // Adding BLUE + and bx, $1F + add ax, bx + cmp ax, $1F + jbe @Skip1 + mov ax, $1F + @Skip1: + mov cx, ax + mov eax, esp // Adding GREEN + mov bx, dx + and ax, $7E0 + and bx, $7E0 + add ax, bx + cmp ax, $7E0 + jbe @Skip2 + mov ax, $7E0 + @Skip2: + or cx, ax + mov eax, esp // Adding RED + mov bx, dx + and eax, $F800 + and ebx, $F800 + add eax, ebx + cmp eax, $F800 + jbe @Skip3 + mov ax, $F800 + @Skip3: + or cx, ax + mov [edi], cx + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 24 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + add WorkX, ax // WorkX := Src.w * 2 + add WorkX, ax // WorkX := Src.w * 3 + @Loopx: + mov bl, [edi] // BX := destination color + mov al, [esi] // AX := source color + cmp al, 0 + je @Skip // if AL=0 then skip COMPONENT + mov ah, 0 // AX := COLOR COMPONENT + mov bh, 0 + add bx, ax + cmp bx, $00ff + jb @Skip + mov bl, $ff + @Skip: + mov [edi], bl + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 32 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + shl ax, 2 + mov WorkX, ax // WorkX := Src.w * 4 + @Loopx: + mov bl, [edi] // BX := destination color + mov al, [esi] // AX := source color + cmp al, 0 + je @Skip // if AL=0 then skip COMPONENT + mov ah, 0 // AX := COLOR COMPONENT + mov bh, 0 + add bx, ax + cmp bx, $00ff + jb @Skip + mov bl, $ff + @Skip: + mov [edi], bl + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DstSurface ); +end; + +procedure SDL_SubSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect ); +var + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr : cardinal; + _ebx, _esi, _edi, _esp : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DstSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DstSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DstSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + end; + with DstSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := DstSurface.Format.BitsPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DstSurface ); + case bits of + 8 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov al, [esi] // AL := source color + cmp al, 0 + je @SkipColor // if AL=0 then skip everything + mov esp, eax // ESP - source color + mov bl, [edi] // BL := destination color + mov dl, bl // DL := destination color + and al, $03 // Subtract BLUE + and bl, $03 + sub bl, al + jns @Skip1 + mov bl, 0 + @Skip1: + mov cl, bl + mov eax, esp // Subtract GREEN + mov bl, dl + and al, $1c + and bl, $1c + sub bl, al + jns @Skip2 + mov bl, 0 + @Skip2: + or cl, bl + mov eax, esp // Subtract RED + mov bl, dl + and ax, $e0 + and bx, $e0 + sub bx, ax + jns @Skip3 + mov bl, 0 + @Skip3: + or cl, bl + mov [edi], cl + @SkipColor: + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 15 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + mov esp, eax // ESP - source color + mov bx, [edi] // BX := destination color + mov dx, bx // DX := destination color + and ax, $001F // Subtract BLUE + and bx, $001F + sub bx, ax + jns @Skip1 + mov bx, 0 + @Skip1: + mov cx, bx + mov eax, esp // Subtract GREEN + mov bx, dx + and ax, $3E0 + and bx, $3E0 + sub bx, ax + jns @Skip2 + mov bx, 0 + @Skip2: + or cx, bx + mov eax, esp // Subtract RED + mov bx, dx + and ax, $7C00 + and bx, $7C00 + sub bx, ax + jns @Skip3 + mov bx, 0 + @Skip3: + or cx, bx + mov [edi], cx + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 16 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + mov esp, eax // ESP - source color + mov bx, [edi] // BX := destination color + mov dx, bx // DX := destination color + and ax, $1F // Subtracting BLUE + and bx, $1F + sub bx, ax + jns @Skip1 + mov bx, 0 + @Skip1: + mov cx, bx + mov eax, esp // Adding GREEN + mov bx, dx + and ax, $7E0 + and bx, $7E0 + sub bx, ax + jns @Skip2 + mov bx, 0 + @Skip2: + or cx, bx + mov eax, esp // Adding RED + mov bx, dx + and eax, $F800 + and ebx, $F800 + sub ebx, eax + jns @Skip3 + mov bx, 0 + @Skip3: + or cx, bx + mov [edi], cx + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 24 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + add WorkX, ax // WorkX := Src.w * 2 + add WorkX, ax // WorkX := Src.w * 3 + @Loopx: + mov bl, [edi] // BX := destination color + mov al, [esi] // AX := source color + cmp al, 0 + je @Skip // if AL=0 then skip COMPONENT + mov ah, 0 // AX := COLOR COMPONENT + mov bh, 0 + sub bx, ax + jns @Skip + mov bl, 0 + @Skip: + mov [edi], bl + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 32 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + shl ax, 2 + mov WorkX, ax // WorkX := Src.w * 4 + @Loopx: + mov bl, [edi] // BX := destination color + mov al, [esi] // AX := source color + cmp al, 0 + je @Skip // if AL=0 then skip COMPONENT + mov ah, 0 // AX := COLOR COMPONENT + mov bh, 0 + sub bx, ax + jns @Skip + mov bl, 0 + @Skip: + mov [edi], bl + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DstSurface ); +end; + +procedure SDL_MonoSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect; Color : cardinal ); +var + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr : cardinal; + _ebx, _esi, _edi, _esp : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod : cardinal; + SrcTransparentColor : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DstSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DstSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DstSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + SrcTransparentColor := format.colorkey; + end; + with DstSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := DstSurface.Format.BitsPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DstSurface ); + case bits of + 8 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + mov ecx, Color + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov al, [esi] // AL := source color + movzx eax, al + cmp eax, SrcTransparentColor + je @SkipColor // if AL=Transparent color then skip everything + mov [edi], cl + @SkipColor: + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + end; + 15, 16 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + mov ecx, Color + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + movzx eax, ax + cmp eax, SrcTransparentColor + je @SkipColor // if AX=Transparent color then skip everything + mov [edi], cx + @SkipColor: + inc esi + inc esi + inc edi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + end; + 24 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov _ebx, ebx + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + mov ecx, Color + and ecx, $00ffffff + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov eax, [esi] // EAX := source color + and eax, $00ffffff + cmp eax, SrcTransparentColor + je @SkipColor // if EAX=Transparent color then skip everything + mov ebx, [edi] + and ebx, $ff000000 + or ebx, ecx + mov [edi], ecx + @SkipColor: + add esi, 3 + add edi, 3 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp, _esp + mov edi, _edi + mov esi, _esi + mov ebx, _ebx + end; + 32 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + mov ecx, Color + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov eax, [esi] // EAX := source color + cmp eax, SrcTransparentColor + je @SkipColor // if EAX=Transparent color then skip everything + mov [edi], ecx + @SkipColor: + add esi, 4 + add edi, 4 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp, _esp + mov edi, _edi + mov esi, _esi + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DstSurface ); +end; +// TextureRect.w and TextureRect.h are not used. +// The TextureSurface's size MUST larger than the drawing rectangle!!! + +procedure SDL_TexturedSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DstSurface : PSDL_Surface; DestRect : PSDL_Rect; Texture : PSDL_Surface; + TextureRect : PSDL_Rect ); +var + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr, TextAddr : cardinal; + _ebx, _esi, _edi, _esp : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod, TextMod : cardinal; + SrcTransparentColor : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DstSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DstSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DstSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + SrcTransparentColor := format.colorkey; + end; + with DstSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := DstSurface.Format.BitsPerPixel; + end; + with Texture^ do + begin + TextAddr := cardinal( Pixels ) + UInt32( TextureRect.y ) * Pitch + + UInt32( TextureRect.x ) * Format.BytesPerPixel; + TextMod := Pitch - Src.w * Format.BytesPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DstSurface ); + SDL_LockSurface( Texture ); + case bits of + 8 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov _ebx, ebx + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ebx, TextAddr + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov al, [esi] // AL := source color + movzx eax, al + cmp eax, SrcTransparentColor + je @SkipColor // if AL=Transparent color then skip everything + mov al, [ebx] + mov [edi], al + @SkipColor: + inc esi + inc edi + inc ebx + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + add ebx, TextMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx, _ebx + end; + 15, 16 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ecx, TextAddr + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AL := source color + movzx eax, ax + cmp eax, SrcTransparentColor + je @SkipColor // if AL=Transparent color then skip everything + mov ax, [ecx] + mov [edi], ax + @SkipColor: + inc esi + inc esi + inc edi + inc edi + inc ecx + inc ecx + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + add ecx, TextMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + end; + 24 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov _ebx, ebx + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ebx, TextAddr + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov eax, [esi] // AL := source color + and eax, $00ffffff + cmp eax, SrcTransparentColor + je @SkipColor // if AL=Transparent color then skip everything + mov eax, [ebx] + and eax, $00ffffff + mov ecx, [edi] + and ecx, $ff000000 + or ecx, eax + mov [edi], eax + @SkipColor: + add esi, 3 + add edi, 3 + add ebx, 3 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + add ebx, TextMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx, _ebx + end; + 32 : + asm + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ecx, TextAddr + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov eax, [esi] // AL := source color + cmp eax, SrcTransparentColor + je @SkipColor // if AL=Transparent color then skip everything + mov eax, [ecx] + mov [edi], eax + @SkipColor: + add esi, 4 + add edi, 4 + add ecx, 4 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + add ecx, TextMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DstSurface ); + SDL_UnlockSurface( Texture ); +end; + +procedure SDL_ZoomSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; DstRect : PSDL_Rect ); +var + xc, yc : cardinal; + rx, wx, ry, wy, ry16 : cardinal; + color : cardinal; + modx, mody : cardinal; +begin + // Warning! No checks for surface pointers!!! + if srcrect = nil then + srcrect := @SrcSurface.clip_rect; + if dstrect = nil then + dstrect := @DstSurface.clip_rect; + if SDL_MustLock( SrcSurface ) then + SDL_LockSurface( SrcSurface ); + if SDL_MustLock( DstSurface ) then + SDL_LockSurface( DstSurface ); + modx := trunc( ( srcrect.w / dstrect.w ) * 65536 ); + mody := trunc( ( srcrect.h / dstrect.h ) * 65536 ); + //rx := srcrect.x * 65536; + ry := srcrect.y * 65536; + wy := dstrect.y; + for yc := 0 to dstrect.h - 1 do + begin + rx := srcrect.x * 65536; + wx := dstrect.x; + ry16 := ry shr 16; + for xc := 0 to dstrect.w - 1 do + begin + color := SDL_GetPixel( SrcSurface, rx shr 16, ry16 ); + SDL_PutPixel( DstSurface, wx, wy, color ); + rx := rx + modx; + inc( wx ); + end; + ry := ry + mody; + inc( wy ); + end; + if SDL_MustLock( SrcSurface ) then + SDL_UnlockSurface( SrcSurface ); + if SDL_MustLock( DstSurface ) then + SDL_UnlockSurface( DstSurface ); +end; +// Re-map a rectangular area into an area defined by four vertices +// Converted from C to Pascal by KiCHY + +procedure SDL_WarpSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; UL, UR, LR, LL : PPoint ); +const + SHIFTS = 15; // Extend ints to limit round-off error (try 2 - 20) + THRESH = 1 shl SHIFTS; // Threshold for pixel size value + procedure CopySourceToDest( UL, UR, LR, LL : TPoint; x1, y1, x2, y2 : cardinal ); + var + tm, lm, rm, bm, m : TPoint; + mx, my : cardinal; + cr : cardinal; + begin + // Does the destination area specify a single pixel? + if ( ( abs( ul.x - ur.x ) < THRESH ) and + ( abs( ul.x - lr.x ) < THRESH ) and + ( abs( ul.x - ll.x ) < THRESH ) and + ( abs( ul.y - ur.y ) < THRESH ) and + ( abs( ul.y - lr.y ) < THRESH ) and + ( abs( ul.y - ll.y ) < THRESH ) ) then + begin // Yes + cr := SDL_GetPixel( SrcSurface, ( x1 shr SHIFTS ), ( y1 shr SHIFTS ) ); + SDL_PutPixel( DstSurface, ( ul.x shr SHIFTS ), ( ul.y shr SHIFTS ), cr ); + end + else + begin // No + // Quarter the source and the destination, and then recurse + tm.x := ( ul.x + ur.x ) shr 1; + tm.y := ( ul.y + ur.y ) shr 1; + bm.x := ( ll.x + lr.x ) shr 1; + bm.y := ( ll.y + lr.y ) shr 1; + lm.x := ( ul.x + ll.x ) shr 1; + lm.y := ( ul.y + ll.y ) shr 1; + rm.x := ( ur.x + lr.x ) shr 1; + rm.y := ( ur.y + lr.y ) shr 1; + m.x := ( tm.x + bm.x ) shr 1; + m.y := ( tm.y + bm.y ) shr 1; + mx := ( x1 + x2 ) shr 1; + my := ( y1 + y2 ) shr 1; + CopySourceToDest( ul, tm, m, lm, x1, y1, mx, my ); + CopySourceToDest( tm, ur, rm, m, mx, y1, x2, my ); + CopySourceToDest( m, rm, lr, bm, mx, my, x2, y2 ); + CopySourceToDest( lm, m, bm, ll, x1, my, mx, y2 ); + end; + end; +var + _UL, _UR, _LR, _LL : TPoint; + Rect_x, Rect_y, Rect_w, Rect_h : integer; +begin + if SDL_MustLock( SrcSurface ) then + SDL_LockSurface( SrcSurface ); + if SDL_MustLock( DstSurface ) then + SDL_LockSurface( DstSurface ); + if SrcRect = nil then + begin + Rect_x := 0; + Rect_y := 0; + Rect_w := ( SrcSurface.w - 1 ) shl SHIFTS; + Rect_h := ( SrcSurface.h - 1 ) shl SHIFTS; + end + else + begin + Rect_x := SrcRect.x; + Rect_y := SrcRect.y; + Rect_w := ( SrcRect.w - 1 ) shl SHIFTS; + Rect_h := ( SrcRect.h - 1 ) shl SHIFTS; + end; + // Shift all values to help reduce round-off error. + _ul.x := ul.x shl SHIFTS; + _ul.y := ul.y shl SHIFTS; + _ur.x := ur.x shl SHIFTS; + _ur.y := ur.y shl SHIFTS; + _lr.x := lr.x shl SHIFTS; + _lr.y := lr.y shl SHIFTS; + _ll.x := ll.x shl SHIFTS; + _ll.y := ll.y shl SHIFTS; + CopySourceToDest( _ul, _ur, _lr, _ll, Rect_x, Rect_y, Rect_w, Rect_h ); + if SDL_MustLock( SrcSurface ) then + SDL_UnlockSurface( SrcSurface ); + if SDL_MustLock( DstSurface ) then + SDL_UnlockSurface( DstSurface ); +end; + +// flips a rectangle vertically on given surface +procedure SDL_FlipRectV( DstSurface : PSDL_Surface; Rect : PSDL_Rect ); +var + TmpRect : TSDL_Rect; + Locked : boolean; + y, FlipLength, RowLength : integer; + Row1, Row2 : Pointer; + OneRow : TByteArray; // Optimize it if you wish +begin + if DstSurface <> nil then + begin + if Rect = nil then + begin // if Rect=nil then we flip the whole surface + TmpRect := SDLRect( 0, 0, DstSurface.w, DstSurface.h ); + Rect := @TmpRect; + end; + FlipLength := Rect^.h shr 1 - 1; + RowLength := Rect^.w * DstSurface^.format.BytesPerPixel; + if SDL_MustLock( DstSurface ) then + begin + Locked := true; + SDL_LockSurface( DstSurface ); + end + else + Locked := false; + Row1 := pointer( cardinal( DstSurface^.Pixels ) + UInt32( Rect^.y ) * + DstSurface^.Pitch ); + Row2 := pointer( cardinal( DstSurface^.Pixels ) + ( UInt32( Rect^.y ) + Rect^.h - 1 ) + * DstSurface^.Pitch ); + for y := 0 to FlipLength do + begin + Move( Row1^, OneRow, RowLength ); + Move( Row2^, Row1^, RowLength ); + Move( OneRow, Row2^, RowLength ); + inc( cardinal( Row1 ), DstSurface^.Pitch ); + dec( cardinal( Row2 ), DstSurface^.Pitch ); + end; + if Locked then + SDL_UnlockSurface( DstSurface ); + end; +end; + +// flips a rectangle horizontally on given surface +procedure SDL_FlipRectH( DstSurface : PSDL_Surface; Rect : PSDL_Rect ); +type + T24bit = packed array[ 0..2 ] of byte; + T24bitArray = packed array[ 0..8191 ] of T24bit; + P24bitArray = ^T24bitArray; + TLongWordArray = array[ 0..8191 ] of LongWord; + PLongWordArray = ^TLongWordArray; +var + TmpRect : TSDL_Rect; + Row8bit : PByteArray; + Row16bit : PWordArray; + Row24bit : P24bitArray; + Row32bit : PLongWordArray; + y, x, RightSide, FlipLength : integer; + Pixel : cardinal; + Pixel24 : T24bit; + Locked : boolean; +begin + if DstSurface <> nil then + begin + if Rect = nil then + begin + TmpRect := SDLRect( 0, 0, DstSurface.w, DstSurface.h ); + Rect := @TmpRect; + end; + FlipLength := Rect^.w shr 1 - 1; + if SDL_MustLock( DstSurface ) then + begin + Locked := true; + SDL_LockSurface( DstSurface ); + end + else + Locked := false; + case DstSurface^.format.BytesPerPixel of + 1 : + begin + Row8Bit := pointer( cardinal( DstSurface^.pixels ) + UInt32( Rect^.y ) * + DstSurface^.pitch ); + for y := 1 to Rect^.h do + begin + RightSide := Rect^.w - 1; + for x := 0 to FlipLength do + begin + Pixel := Row8Bit^[ x ]; + Row8Bit^[ x ] := Row8Bit^[ RightSide ]; + Row8Bit^[ RightSide ] := Pixel; + dec( RightSide ); + end; + inc( cardinal( Row8Bit ), DstSurface^.pitch ); + end; + end; + 2 : + begin + Row16Bit := pointer( cardinal( DstSurface^.pixels ) + UInt32( Rect^.y ) * + DstSurface^.pitch ); + for y := 1 to Rect^.h do + begin + RightSide := Rect^.w - 1; + for x := 0 to FlipLength do + begin + Pixel := Row16Bit^[ x ]; + Row16Bit^[ x ] := Row16Bit^[ RightSide ]; + Row16Bit^[ RightSide ] := Pixel; + dec( RightSide ); + end; + inc( cardinal( Row16Bit ), DstSurface^.pitch ); + end; + end; + 3 : + begin + Row24Bit := pointer( cardinal( DstSurface^.pixels ) + UInt32( Rect^.y ) * + DstSurface^.pitch ); + for y := 1 to Rect^.h do + begin + RightSide := Rect^.w - 1; + for x := 0 to FlipLength do + begin + Pixel24 := Row24Bit^[ x ]; + Row24Bit^[ x ] := Row24Bit^[ RightSide ]; + Row24Bit^[ RightSide ] := Pixel24; + dec( RightSide ); + end; + inc( cardinal( Row24Bit ), DstSurface^.pitch ); + end; + end; + 4 : + begin + Row32Bit := pointer( cardinal( DstSurface^.pixels ) + UInt32( Rect^.y ) * + DstSurface^.pitch ); + for y := 1 to Rect^.h do + begin + RightSide := Rect^.w - 1; + for x := 0 to FlipLength do + begin + Pixel := Row32Bit^[ x ]; + Row32Bit^[ x ] := Row32Bit^[ RightSide ]; + Row32Bit^[ RightSide ] := Pixel; + dec( RightSide ); + end; + inc( cardinal( Row32Bit ), DstSurface^.pitch ); + end; + end; + end; + if Locked then + SDL_UnlockSurface( DstSurface ); + end; +end; + +// Use with caution! The procedure allocates memory for TSDL_Rect and return with its pointer. +// But you MUST free it after you don't need it anymore!!! +function PSDLRect( aLeft, aTop, aWidth, aHeight : integer ) : PSDL_Rect; +var + Rect : PSDL_Rect; +begin + New( Rect ); + with Rect^ do + begin + x := aLeft; + y := aTop; + w := aWidth; + h := aHeight; + end; + Result := Rect; +end; + +function SDLRect( aLeft, aTop, aWidth, aHeight : integer ) : TSDL_Rect; +begin + with result do + begin + x := aLeft; + y := aTop; + w := aWidth; + h := aHeight; + end; +end; + +function SDLRect( aRect : TRect ) : TSDL_Rect; +begin + with aRect do + result := SDLRect( Left, Top, Right - Left, Bottom - Top ); +end; + +procedure SDL_Stretch8( Surface, Dst_Surface : PSDL_Surface; x1, x2, y1, y2, yr, yw, + depth : integer ); +var + dx, dy, e, d, dx2 : integer; + src_pitch, dst_pitch : uint16; + src_pixels, dst_pixels : PUint8; +begin + if ( yw >= dst_surface^.h ) then + exit; + dx := ( x2 - x1 ); + dy := ( y2 - y1 ); + dy := dy shl 1; + e := dy - dx; + dx2 := dx shl 1; + src_pitch := Surface^.pitch; + dst_pitch := dst_surface^.pitch; + src_pixels := PUint8( integer( Surface^.pixels ) + yr * src_pitch + y1 * depth ); + dst_pixels := PUint8( integer( dst_surface^.pixels ) + yw * dst_pitch + x1 * + depth ); + for d := 0 to dx - 1 do + begin + move( src_pixels^, dst_pixels^, depth ); + while ( e >= 0 ) do + begin + inc( src_pixels, depth ); + e := e - dx2; + end; + inc( dst_pixels, depth ); + e := e + dy; + end; +end; + +function sign( x : integer ) : integer; +begin + if x > 0 then + result := 1 + else + result := -1; +end; + +// Stretches a part of a surface +function SDL_ScaleSurfaceRect( SrcSurface : PSDL_Surface; SrcX1, SrcY1, SrcW, SrcH, + Width, Height : integer ) : PSDL_Surface; +var + dst_surface : PSDL_Surface; + dx, dy, e, d, dx2, srcx2, srcy2 : integer; + destx1, desty1 : integer; +begin + srcx2 := srcx1 + SrcW; + srcy2 := srcy1 + SrcH; + result := nil; + destx1 := 0; + desty1 := 0; + dx := abs( integer( Height - desty1 ) ); + dy := abs( integer( SrcY2 - SrcY1 ) ); + e := ( dy shl 1 ) - dx; + dx2 := dx shl 1; + dy := dy shl 1; + dst_surface := SDL_CreateRGBSurface( SDL_HWPALETTE, width - destx1, Height - + desty1, + SrcSurface^.Format^.BitsPerPixel, + SrcSurface^.Format^.RMask, + SrcSurface^.Format^.GMask, + SrcSurface^.Format^.BMask, + SrcSurface^.Format^.AMask ); + if ( dst_surface^.format^.BytesPerPixel = 1 ) then + SDL_SetColors( dst_surface, @SrcSurface^.format^.palette^.colors^[ 0 ], 0, 256 ); + SDL_SetColorKey( dst_surface, sdl_srccolorkey, SrcSurface^.format^.colorkey ); + if ( SDL_MustLock( dst_surface ) ) then + if ( SDL_LockSurface( dst_surface ) < 0 ) then + exit; + for d := 0 to dx - 1 do + begin + SDL_Stretch8( SrcSurface, dst_surface, destx1, Width, SrcX1, SrcX2, SrcY1, desty1, + SrcSurface^.format^.BytesPerPixel ); + while e >= 0 do + begin + inc( SrcY1 ); + e := e - dx2; + end; + inc( desty1 ); + e := e + dy; + end; + if SDL_MUSTLOCK( dst_surface ) then + SDL_UnlockSurface( dst_surface ); + result := dst_surface; +end; + +procedure SDL_ScrollY( DstSurface : PSDL_Surface; DifY : integer ); +var + r1, r2 : TSDL_Rect; + //buffer: PSDL_Surface; + YPos : Integer; +begin + if ( DstSurface <> nil ) and ( DifY <> 0 ) then + begin + //if DifY > 0 then // going up + //begin + ypos := 0; + r1.x := 0; + r2.x := 0; + r1.w := DstSurface.w; + r2.w := DstSurface.w; + r1.h := DifY; + r2.h := DifY; + while ypos < DstSurface.h do + begin + r1.y := ypos; + r2.y := ypos + DifY; + SDL_BlitSurface( DstSurface, @r2, DstSurface, @r1 ); + ypos := ypos + DifY; + end; + //end + //else + //begin // Going Down + //end; + end; +end; + +procedure SDL_ScrollX( DstSurface : PSDL_Surface; DifX : integer ); +var + r1, r2 : TSDL_Rect; + buffer : PSDL_Surface; +begin + if ( DstSurface <> nil ) and ( DifX <> 0 ) then + begin + buffer := SDL_CreateRGBSurface( SDL_HWSURFACE, ( DstSurface^.w - DifX ) * 2, + DstSurface^.h * 2, + DstSurface^.Format^.BitsPerPixel, + DstSurface^.Format^.RMask, + DstSurface^.Format^.GMask, + DstSurface^.Format^.BMask, + DstSurface^.Format^.AMask ); + if buffer <> nil then + begin + if ( buffer^.format^.BytesPerPixel = 1 ) then + SDL_SetColors( buffer, @DstSurface^.format^.palette^.colors^[ 0 ], 0, 256 ); + r1 := SDLRect( DifX, 0, buffer^.w, buffer^.h ); + r2 := SDLRect( 0, 0, buffer^.w, buffer^.h ); + SDL_BlitSurface( DstSurface, @r1, buffer, @r2 ); + SDL_BlitSurface( buffer, @r2, DstSurface, @r2 ); + SDL_FreeSurface( buffer ); + end; + end; +end; + +procedure SDL_RotateRad( DstSurface, SrcSurface : PSDL_Surface; SrcRect : + PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Single ); +var + aSin, aCos : Single; + MX, MY, DX, DY, NX, NY, SX, SY, OX, OY, Width, Height, TX, TY, RX, RY, ROX, ROY : Integer; + Colour, TempTransparentColour : UInt32; + MAXX, MAXY : Integer; +begin + // Rotate the surface to the target surface. + TempTransparentColour := SrcSurface.format.colorkey; + if srcRect.w > srcRect.h then + begin + Width := srcRect.w; + Height := srcRect.w; + end + else + begin + Width := srcRect.h; + Height := srcRect.h; + end; + + maxx := DstSurface.w; + maxy := DstSurface.h; + aCos := cos( Angle ); + aSin := sin( Angle ); + + Width := round( abs( srcrect.h * acos ) + abs( srcrect.w * asin ) ); + Height := round( abs( srcrect.h * asin ) + abs( srcrect.w * acos ) ); + + OX := Width div 2; + OY := Height div 2; ; + MX := ( srcRect.x + ( srcRect.x + srcRect.w ) ) div 2; + MY := ( srcRect.y + ( srcRect.y + srcRect.h ) ) div 2; + ROX := ( -( srcRect.w div 2 ) ) + Offsetx; + ROY := ( -( srcRect.h div 2 ) ) + OffsetY; + Tx := ox + round( ROX * aSin - ROY * aCos ); + Ty := oy + round( ROY * aSin + ROX * aCos ); + SX := 0; + for DX := DestX - TX to DestX - TX + ( width ) do + begin + Inc( SX ); + SY := 0; + for DY := DestY - TY to DestY - TY + ( Height ) do + begin + RX := SX - OX; + RY := SY - OY; + NX := round( mx + RX * aSin + RY * aCos ); // + NY := round( my + RY * aSin - RX * aCos ); // + // Used for testing only + //SDL_PutPixel(DstSurface.SDLSurfacePointer,DX,DY,0); + if ( ( DX > 0 ) and ( DX < MAXX ) ) and ( ( DY > 0 ) and ( DY < MAXY ) ) then + begin + if ( NX >= srcRect.x ) and ( NX <= srcRect.x + srcRect.w ) then + begin + if ( NY >= srcRect.y ) and ( NY <= srcRect.y + srcRect.h ) then + begin + Colour := SDL_GetPixel( SrcSurface, NX, NY ); + if Colour <> TempTransparentColour then + begin + SDL_PutPixel( DstSurface, DX, DY, Colour ); + end; + end; + end; + end; + inc( SY ); + end; + end; +end; + +procedure SDL_RotateDeg( DstSurface, SrcSurface : PSDL_Surface; SrcRect : + PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Integer ); +begin + SDL_RotateRad( DstSurface, SrcSurface, SrcRect, DestX, DestY, OffsetX, OffsetY, DegToRad( Angle ) ); +end; + +function ValidateSurfaceRect( DstSurface : PSDL_Surface; dstrect : PSDL_Rect ) : TSDL_Rect; +var + RealRect : TSDL_Rect; + OutOfRange : Boolean; +begin + OutOfRange := false; + if dstrect = nil then + begin + RealRect.x := 0; + RealRect.y := 0; + RealRect.w := DstSurface.w; + RealRect.h := DstSurface.h; + end + else + begin + if dstrect.x < DstSurface.w then + begin + RealRect.x := dstrect.x; + end + else if dstrect.x < 0 then + begin + realrect.x := 0; + end + else + begin + OutOfRange := True; + end; + if dstrect.y < DstSurface.h then + begin + RealRect.y := dstrect.y; + end + else if dstrect.y < 0 then + begin + realrect.y := 0; + end + else + begin + OutOfRange := True; + end; + if OutOfRange = False then + begin + if realrect.x + dstrect.w <= DstSurface.w then + begin + RealRect.w := dstrect.w; + end + else + begin + RealRect.w := dstrect.w - realrect.x; + end; + if realrect.y + dstrect.h <= DstSurface.h then + begin + RealRect.h := dstrect.h; + end + else + begin + RealRect.h := dstrect.h - realrect.y; + end; + end; + end; + if OutOfRange = False then + begin + result := realrect; + end + else + begin + realrect.w := 0; + realrect.h := 0; + realrect.x := 0; + realrect.y := 0; + result := realrect; + end; +end; + +procedure SDL_FillRectAdd( DstSurface : PSDL_Surface; dstrect : PSDL_Rect; color : UInt32 ); +var + RealRect : TSDL_Rect; + Addr : pointer; + ModX, BPP : cardinal; + x, y, R, G, B, SrcColor : cardinal; +begin + RealRect := ValidateSurfaceRect( DstSurface, DstRect ); + if ( RealRect.w > 0 ) and ( RealRect.h > 0 ) then + begin + SDL_LockSurface( DstSurface ); + BPP := DstSurface.format.BytesPerPixel; + with DstSurface^ do + begin + Addr := pointer( UInt32( pixels ) + UInt32( RealRect.y ) * pitch + UInt32( RealRect.x ) * BPP ); + ModX := Pitch - UInt32( RealRect.w ) * BPP; + end; + case DstSurface.format.BitsPerPixel of + 8 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $E0 + Color and $E0; + G := SrcColor and $1C + Color and $1C; + B := SrcColor and $03 + Color and $03; + if R > $E0 then + R := $E0; + if G > $1C then + G := $1C; + if B > $03 then + B := $03; + PUInt8( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 15 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $7C00 + Color and $7C00; + G := SrcColor and $03E0 + Color and $03E0; + B := SrcColor and $001F + Color and $001F; + if R > $7C00 then + R := $7C00; + if G > $03E0 then + G := $03E0; + if B > $001F then + B := $001F; + PUInt16( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 16 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $F800 + Color and $F800; + G := SrcColor and $07C0 + Color and $07C0; + B := SrcColor and $001F + Color and $001F; + if R > $F800 then + R := $F800; + if G > $07C0 then + G := $07C0; + if B > $001F then + B := $001F; + PUInt16( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 24 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $00FF0000 + Color and $00FF0000; + G := SrcColor and $0000FF00 + Color and $0000FF00; + B := SrcColor and $000000FF + Color and $000000FF; + if R > $FF0000 then + R := $FF0000; + if G > $00FF00 then + G := $00FF00; + if B > $0000FF then + B := $0000FF; + PUInt32( Addr )^ := SrcColor and $FF000000 or R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 32 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $00FF0000 + Color and $00FF0000; + G := SrcColor and $0000FF00 + Color and $0000FF00; + B := SrcColor and $000000FF + Color and $000000FF; + if R > $FF0000 then + R := $FF0000; + if G > $00FF00 then + G := $00FF00; + if B > $0000FF then + B := $0000FF; + PUInt32( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + end; + SDL_UnlockSurface( DstSurface ); + end; +end; + +procedure SDL_FillRectSub( DstSurface : PSDL_Surface; dstrect : PSDL_Rect; color : UInt32 ); +var + RealRect : TSDL_Rect; + Addr : pointer; + ModX, BPP : cardinal; + x, y, R, G, B, SrcColor : cardinal; +begin + RealRect := ValidateSurfaceRect( DstSurface, DstRect ); + if ( RealRect.w > 0 ) and ( RealRect.h > 0 ) then + begin + SDL_LockSurface( DstSurface ); + BPP := DstSurface.format.BytesPerPixel; + with DstSurface^ do + begin + Addr := pointer( UInt32( pixels ) + UInt32( RealRect.y ) * pitch + UInt32( RealRect.x ) * BPP ); + ModX := Pitch - UInt32( RealRect.w ) * BPP; + end; + case DstSurface.format.BitsPerPixel of + 8 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $E0 - Color and $E0; + G := SrcColor and $1C - Color and $1C; + B := SrcColor and $03 - Color and $03; + if R > $E0 then + R := 0; + if G > $1C then + G := 0; + if B > $03 then + B := 0; + PUInt8( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 15 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $7C00 - Color and $7C00; + G := SrcColor and $03E0 - Color and $03E0; + B := SrcColor and $001F - Color and $001F; + if R > $7C00 then + R := 0; + if G > $03E0 then + G := 0; + if B > $001F then + B := 0; + PUInt16( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 16 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $F800 - Color and $F800; + G := SrcColor and $07C0 - Color and $07C0; + B := SrcColor and $001F - Color and $001F; + if R > $F800 then + R := 0; + if G > $07C0 then + G := 0; + if B > $001F then + B := 0; + PUInt16( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 24 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $00FF0000 - Color and $00FF0000; + G := SrcColor and $0000FF00 - Color and $0000FF00; + B := SrcColor and $000000FF - Color and $000000FF; + if R > $FF0000 then + R := 0; + if G > $00FF00 then + G := 0; + if B > $0000FF then + B := 0; + PUInt32( Addr )^ := SrcColor and $FF000000 or R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + 32 : + begin + for y := 0 to RealRect.h - 1 do + begin + for x := 0 to RealRect.w - 1 do + begin + SrcColor := PUInt32( Addr )^; + R := SrcColor and $00FF0000 - Color and $00FF0000; + G := SrcColor and $0000FF00 - Color and $0000FF00; + B := SrcColor and $000000FF - Color and $000000FF; + if R > $FF0000 then + R := 0; + if G > $00FF00 then + G := 0; + if B > $0000FF then + B := 0; + PUInt32( Addr )^ := R or G or B; + inc( UInt32( Addr ), BPP ); + end; + inc( UInt32( Addr ), ModX ); + end; + end; + end; + SDL_UnlockSurface( DstSurface ); + end; +end; + +procedure SDL_GradientFillRect( DstSurface : PSDL_Surface; const Rect : PSDL_Rect; const StartColor, EndColor : TSDL_Color; const Style : TGradientStyle ); +var + FBC : array[ 0..255 ] of Cardinal; + // temp vars + i, YR, YG, YB, SR, SG, SB, DR, DG, DB : Integer; + + TempStepV, TempStepH : Single; + TempLeft, TempTop, TempHeight, TempWidth : integer; + TempRect : TSDL_Rect; + +begin + // calc FBC + YR := StartColor.r; + YG := StartColor.g; + YB := StartColor.b; + SR := YR; + SG := YG; + SB := YB; + DR := EndColor.r - SR; + DG := EndColor.g - SG; + DB := EndColor.b - SB; + + for i := 0 to 255 do + begin + FBC[ i ] := SDL_MapRGB( DstSurface.format, YR, YG, YB ); + YR := SR + round( DR / 255 * i ); + YG := SG + round( DG / 255 * i ); + YB := SB + round( DB / 255 * i ); + end; + + // if aStyle = 1 then begin + TempStepH := Rect.w / 255; + TempStepV := Rect.h / 255; + TempHeight := Trunc( TempStepV + 1 ); + TempWidth := Trunc( TempStepH + 1 ); + TempTop := 0; + TempLeft := 0; + TempRect.x := Rect.x; + TempRect.y := Rect.y; + TempRect.h := Rect.h; + TempRect.w := Rect.w; + + case Style of + gsHorizontal : + begin + TempRect.h := TempHeight; + for i := 0 to 255 do + begin + TempRect.y := Rect.y + TempTop; + SDL_FillRect( DstSurface, @TempRect, FBC[ i ] ); + TempTop := Trunc( TempStepV * i ); + end; + end; + gsVertical : + begin + TempRect.w := TempWidth; + for i := 0 to 255 do + begin + TempRect.x := Rect.x + TempLeft; + SDL_FillRect( DstSurface, @TempRect, FBC[ i ] ); + TempLeft := Trunc( TempStepH * i ); + end; + end; + end; +end; + +procedure SDL_2xBlit( Src, Dest : PSDL_Surface ); +var + ReadAddr, WriteAddr, ReadRow, WriteRow : UInt32; + SrcPitch, DestPitch, x, y, w, h : UInt32; +begin + if ( Src = nil ) or ( Dest = nil ) then + exit; + if ( Src.w shl 1 ) < Dest.w then + exit; + if ( Src.h shl 1 ) < Dest.h then + exit; + + if SDL_MustLock( Src ) then + SDL_LockSurface( Src ); + if SDL_MustLock( Dest ) then + SDL_LockSurface( Dest ); + + ReadRow := UInt32( Src.Pixels ); + WriteRow := UInt32( Dest.Pixels ); + + SrcPitch := Src.pitch; + DestPitch := Dest.pitch; + + w := Src.w; + h := Src.h; + + case Src.format.BytesPerPixel of + 1 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov al, [ecx] // PUInt8(WriteAddr)^ := PUInt8(ReadAddr)^; + mov [edx], al + mov [edx + 1], al // PUInt8(WriteAddr + 1)^ := PUInt8(ReadAddr)^; + mov [edx + ebx], al // PUInt8(WriteAddr + DestPitch)^ := PUInt8(ReadAddr)^; + mov [edx + ebx + 1], al // PUInt8(WriteAddr + DestPitch + 1)^ := PUInt8(ReadAddr)^; + + inc ecx // inc(ReadAddr); + add edx, 2 // inc(WriteAddr, 2); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 2 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov ax, [ecx] // PUInt16(WriteAddr)^ := PUInt16(ReadAddr)^; + mov [edx], ax + mov [edx + 2], ax // PUInt16(WriteAddr + 2)^ := PUInt16(ReadAddr)^; + mov [edx + ebx], ax // PUInt16(WriteAddr + DestPitch)^ := PUInt16(ReadAddr)^; + mov [edx + ebx + 2], ax // PUInt16(WriteAddr + DestPitch + 2)^ := PUInt16(ReadAddr)^; + + add ecx, 2 // inc(ReadAddr, 2); + add edx, 4 // inc(WriteAddr, 4); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 3 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov eax, [ecx] // (PUInt32(WriteAddr)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + and eax, $00ffffff + and dword ptr [edx], $ff000000 + or [edx], eax + and dword ptr [edx + 3], $00ffffff // (PUInt32(WriteAddr + 3)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + or [edx + 3], eax + and dword ptr [edx + ebx], $00ffffff // (PUInt32(WriteAddr + DestPitch)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + or [edx + ebx], eax + and dword ptr [edx + ebx + 3], $00ffffff // (PUInt32(WriteAddr + DestPitch + 3)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + or [edx + ebx + 3], eax + + add ecx, 3 // inc(ReadAddr, 3); + add edx, 6 // inc(WriteAddr, 6); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 4 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov eax, [ecx] // PUInt32(WriteAddr)^ := PUInt32(ReadAddr)^; + mov [edx], eax + mov [edx + 4], eax // PUInt32(WriteAddr + 4)^ := PUInt32(ReadAddr)^; + mov [edx + ebx], eax // PUInt32(WriteAddr + DestPitch)^ := PUInt32(ReadAddr)^; + mov [edx + ebx + 4], eax // PUInt32(WriteAddr + DestPitch + 4)^ := PUInt32(ReadAddr)^; + + add ecx, 4 // inc(ReadAddr, 4); + add edx, 8 // inc(WriteAddr, 8); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + end; + + if SDL_MustLock( Src ) then + SDL_UnlockSurface( Src ); + if SDL_MustLock( Dest ) then + SDL_UnlockSurface( Dest ); +end; + +procedure SDL_Scanline2xBlit( Src, Dest : PSDL_Surface ); +var + ReadAddr, WriteAddr, ReadRow, WriteRow : UInt32; + SrcPitch, DestPitch, x, y, w, h : UInt32; +begin + if ( Src = nil ) or ( Dest = nil ) then + exit; + if ( Src.w shl 1 ) < Dest.w then + exit; + if ( Src.h shl 1 ) < Dest.h then + exit; + + if SDL_MustLock( Src ) then + SDL_LockSurface( Src ); + if SDL_MustLock( Dest ) then + SDL_LockSurface( Dest ); + + ReadRow := UInt32( Src.Pixels ); + WriteRow := UInt32( Dest.Pixels ); + + SrcPitch := Src.pitch; + DestPitch := Dest.pitch; + + w := Src.w; + h := Src.h; + + case Src.format.BytesPerPixel of + 1 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + + @LoopX: + mov al, [ecx] // PUInt8(WriteAddr)^ := PUInt8(ReadAddr)^; + mov [edx], al + mov [edx + 1], al // PUInt8(WriteAddr + 1)^ := PUInt8(ReadAddr)^; + + inc ecx // inc(ReadAddr); + add edx, 2 // inc(WriteAddr, 2); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 2 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + + @LoopX: + mov ax, [ecx] // PUInt16(WriteAddr)^ := PUInt16(ReadAddr)^; + mov [edx], ax + mov [edx + 2], eax // PUInt16(WriteAddr + 2)^ := PUInt16(ReadAddr)^; + + add ecx, 2 // inc(ReadAddr, 2); + add edx, 4 // inc(WriteAddr, 4); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 3 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + + @LoopX: + mov eax, [ecx] // (PUInt32(WriteAddr)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + and eax, $00ffffff + and dword ptr [edx], $ff000000 + or [edx], eax + and dword ptr [edx + 3], $00ffffff // (PUInt32(WriteAddr + 3)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + or [edx + 3], eax + + add ecx, 3 // inc(ReadAddr, 3); + add edx, 6 // inc(WriteAddr, 6); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 4 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + + @LoopX: + mov eax, [ecx] // PUInt32(WriteAddr)^ := PUInt32(ReadAddr)^; + mov [edx], eax + mov [edx + 4], eax // PUInt32(WriteAddr + 4)^ := PUInt32(ReadAddr)^; + + add ecx, 4 // inc(ReadAddr, 4); + add edx, 8 // inc(WriteAddr, 8); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + end; + + if SDL_MustLock( Src ) then + SDL_UnlockSurface( Src ); + if SDL_MustLock( Dest ) then + SDL_UnlockSurface( Dest ); +end; + +procedure SDL_50Scanline2xBlit( Src, Dest : PSDL_Surface ); +var + ReadAddr, WriteAddr, ReadRow, WriteRow : UInt32; + SrcPitch, DestPitch, x, y, w, h : UInt32; +begin + if ( Src = nil ) or ( Dest = nil ) then + exit; + if ( Src.w shl 1 ) < Dest.w then + exit; + if ( Src.h shl 1 ) < Dest.h then + exit; + + if SDL_MustLock( Src ) then + SDL_LockSurface( Src ); + if SDL_MustLock( Dest ) then + SDL_LockSurface( Dest ); + + ReadRow := UInt32( Src.Pixels ); + WriteRow := UInt32( Dest.Pixels ); + + SrcPitch := Src.pitch; + DestPitch := Dest.pitch; + + w := Src.w; + h := Src.h; + + case Src.format.BitsPerPixel of + 8 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov al, [ecx] // PUInt8(WriteAddr)^ := PUInt8(ReadAddr)^; + mov [edx], al + mov [edx + 1], al // PUInt8(WriteAddr + 1)^ := PUInt8(ReadAddr)^; + shr al, 1 + and al, $6d + mov [edx + ebx], al // PUInt8(WriteAddr + DestPitch)^ := PUInt8(ReadAddr)^; + mov [edx + ebx + 1], al // PUInt8(WriteAddr + DestPitch + 1)^ := PUInt8(ReadAddr)^; + + inc ecx // inc(ReadAddr); + add edx, 2 // inc(WriteAddr, 2); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 15 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov ax, [ecx] // PUInt16(WriteAddr)^ := PUInt16(ReadAddr)^; + mov [edx], ax + mov [edx + 2], ax // PUInt16(WriteAddr + 2)^ := PUInt16(ReadAddr)^; + shr ax, 1 + and ax, $3def + mov [edx + ebx], ax // PUInt16(WriteAddr + DestPitch)^ := PUInt16(ReadAddr)^; + mov [edx + ebx + 2], ax // PUInt16(WriteAddr + DestPitch + 2)^ := PUInt16(ReadAddr)^; + + add ecx, 2 // inc(ReadAddr, 2); + add edx, 4 // inc(WriteAddr, 4); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 16 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov ax, [ecx] // PUInt16(WriteAddr)^ := PUInt16(ReadAddr)^; + mov [edx], ax + mov [edx + 2], ax // PUInt16(WriteAddr + 2)^ := PUInt16(ReadAddr)^; + shr ax, 1 + and ax, $7bef + mov [edx + ebx], ax // PUInt16(WriteAddr + DestPitch)^ := PUInt16(ReadAddr)^; + mov [edx + ebx + 2], ax // PUInt16(WriteAddr + DestPitch + 2)^ := PUInt16(ReadAddr)^; + + add ecx, 2 // inc(ReadAddr, 2); + add edx, 4 // inc(WriteAddr, 4); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 24 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov eax, [ecx] // (PUInt32(WriteAddr)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + and eax, $00ffffff + and dword ptr [edx], $ff000000 + or [edx], eax + and dword ptr [edx + 3], $00ffffff // (PUInt32(WriteAddr + 3)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + or [edx + 3], eax + shr eax, 1 + and eax, $007f7f7f + and dword ptr [edx + ebx], $00ffffff // (PUInt32(WriteAddr + DestPitch)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + or [edx + ebx], eax + and dword ptr [edx + ebx + 3], $00ffffff // (PUInt32(WriteAddr + DestPitch + 3)^ and $ff000000) or (PUInt32(ReadAddr)^ and $00ffffff); + or [edx + ebx + 3], eax + + add ecx, 3 // inc(ReadAddr, 3); + add edx, 6 // inc(WriteAddr, 6); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + 32 : + asm + push ebx + mov eax, h // for y := 1 to Src.h do + mov y, eax + @LoopY: + mov eax, ReadRow // ReadAddr := ReadRow; + mov ReadAddr, eax + + mov eax, WriteRow // WriteAddr := WriteRow; + mov WriteAddr, eax + + mov eax, w // for x := 1 to Src.w do + mov x, eax + + mov ecx, ReadAddr + mov edx, WriteAddr + mov ebx, DestPitch + + @LoopX: + mov eax, [ecx] // PUInt32(WriteAddr)^ := PUInt32(ReadAddr)^; + mov [edx], eax + mov [edx + 4], eax // PUInt32(WriteAddr + 4)^ := PUInt32(ReadAddr)^; + shr eax, 1 + and eax, $7f7f7f7f + mov [edx + ebx], eax // PUInt32(WriteAddr + DestPitch)^ := PUInt32(ReadAddr)^; + mov [edx + ebx + 4], eax // PUInt32(WriteAddr + DestPitch + 4)^ := PUInt32(ReadAddr)^; + + add ecx, 4 // inc(ReadAddr, 4); + add edx, 8 // inc(WriteAddr, 8); + + dec x + jnz @LoopX + + mov eax, SrcPitch // inc(UInt32(ReadRow), SrcPitch); + add ReadRow, eax + + mov eax, DestPitch // inc(UInt32(WriteRow), DestPitch * 2); + add WriteRow, eax + add WriteRow, eax + + dec y + jnz @LoopY + pop ebx + end; + end; + + if SDL_MustLock( Src ) then + SDL_UnlockSurface( Src ); + if SDL_MustLock( Dest ) then + SDL_UnlockSurface( Dest ); +end; + +function SDL_PixelTestSurfaceVsRect( SrcSurface1 : PSDL_Surface; SrcRect1 : PSDL_Rect; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) : +boolean; +var + Src_Rect1, Src_Rect2 : TSDL_Rect; + right1, bottom1 : integer; + right2, bottom2 : integer; + Scan1Start, Scan2Start, ScanWidth, ScanHeight : cardinal; + Mod1: cardinal; + Addr1 : cardinal; + BPP : cardinal; + Pitch1 : cardinal; + TransparentColor1 : cardinal; + tx, ty : cardinal; + StartTick : cardinal; + Color1 : cardinal; +begin + Result := false; + if SrcRect1 = nil then + begin + with Src_Rect1 do + begin + x := 0; + y := 0; + w := SrcSurface1.w; + h := SrcSurface1.h; + end; + end + else + Src_Rect1 := SrcRect1^; + + Src_Rect2 := SrcRect2^; + with Src_Rect1 do + begin + Right1 := Left1 + w; + Bottom1 := Top1 + h; + end; + with Src_Rect2 do + begin + Right2 := Left2 + w; + Bottom2 := Top2 + h; + end; + if ( Left1 >= Right2 ) or ( Right1 <= Left2 ) or ( Top1 >= Bottom2 ) or ( +Bottom1 <= + Top2 ) then + exit; + if Left1 <= Left2 then + begin + // 1. left, 2. right + Scan1Start := Src_Rect1.x + Left2 - Left1; + Scan2Start := Src_Rect2.x; + ScanWidth := Right1 - Left2; + with Src_Rect2 do + if ScanWidth > w then + ScanWidth := w; + end + else + begin + // 1. right, 2. left + Scan1Start := Src_Rect1.x; + Scan2Start := Src_Rect2.x + Left1 - Left2; + ScanWidth := Right2 - Left1; + with Src_Rect1 do + if ScanWidth > w then + ScanWidth := w; + end; + with SrcSurface1^ do + begin + Pitch1 := Pitch; + Addr1 := cardinal( Pixels ); + inc( Addr1, Pitch1 * UInt32( Src_Rect1.y ) ); + with format^ do + begin + BPP := BytesPerPixel; + TransparentColor1 := colorkey; + end; + end; + + Mod1 := Pitch1 - ( ScanWidth * BPP ); + + inc( Addr1, BPP * Scan1Start ); + + if Top1 <= Top2 then + begin + // 1. up, 2. down + ScanHeight := Bottom1 - Top2; + if ScanHeight > Src_Rect2.h then + ScanHeight := Src_Rect2.h; + inc( Addr1, Pitch1 * UInt32( Top2 - Top1 ) ); + end + else + begin + // 1. down, 2. up + ScanHeight := Bottom2 - Top1; + if ScanHeight > Src_Rect1.h then + ScanHeight := Src_Rect1.h; + + end; + case BPP of + 1 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + if ( PByte( Addr1 )^ <> TransparentColor1 ) then + begin + Result := true; + exit; + end; + inc( Addr1 ); + + end; + inc( Addr1, Mod1 ); + + end; + 2 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + if ( PWord( Addr1 )^ <> TransparentColor1 ) then + begin + Result := true; + exit; + end; + inc( Addr1, 2 ); + + end; + inc( Addr1, Mod1 ); + + end; + 3 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + Color1 := PLongWord( Addr1 )^ and $00FFFFFF; + + if ( Color1 <> TransparentColor1 ) + then + begin + Result := true; + exit; + end; + inc( Addr1, 3 ); + + end; + inc( Addr1, Mod1 ); + + end; + 4 : + for ty := 1 to ScanHeight do + begin + for tx := 1 to ScanWidth do + begin + if ( PLongWord( Addr1 )^ <> TransparentColor1 ) then + begin + Result := true; + exit; + end; + inc( Addr1, 4 ); + + end; + inc( Addr1, Mod1 ); + + end; + end; +end; + +procedure SDL_ORSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); +var + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr, TransparentColor : cardinal; + // TransparentColor: cardinal; + _ebx, _esi, _edi, _esp : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DestSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DestSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DestSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + TransparentColor := Format.colorkey; + end; + with DestSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := Format.BitsPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DestSurface ); + WorkY := Src.h; + case bits of + 8 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov al, [esi] // AL := source color + cmp al, 0 + je @SkipColor // if AL=0 or AL=transparent color then skip everything + cmp al, byte ptr TransparentColor + je @SkipColor + or al, [edi] + mov [edi], al + @SkipColor: + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 15 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + cmp ax, word ptr TransparentColor + je @SkipColor + or ax, [edi] + mov [edi], ax + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 16 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + cmp ax, word ptr TransparentColor + je @SkipColor + or ax, [edi] + mov [edi], ax + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 24 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + add WorkX, ax // WorkX := Src.w * 2 + add WorkX, ax // WorkX := Src.w * 3 + @Loopx: + mov al, [esi] // AL := source color + or al, [edi] + mov [edi], al + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 32 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + shl ax, 2 + mov WorkX, ax // WorkX := Src.w * 4 + @Loopx: + mov al, [esi] // AL := source color + or al, [edi] + mov [edi], al + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DestSurface ); +end; + +procedure SDL_ANDSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); +var + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr, TransparentColor : cardinal; + // TransparentColor: cardinal; + _ebx, _esi, _edi, _esp : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DestSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DestSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DestSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + TransparentColor := Format.colorkey; + end; + with DestSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := Format.BitsPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DestSurface ); + WorkY := Src.h; + case bits of + 8 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov al, [esi] // AL := source color + cmp al, 0 + je @SkipColor // if AL=0 or AL=transparent color then skip everything + cmp al, byte ptr TransparentColor + je @SkipColor + and al, [edi] + mov [edi], al + @SkipColor: + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 15 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + cmp ax, word ptr TransparentColor + je @SkipColor + and ax, [edi] + mov [edi], ax + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 16 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + @Loopx: + mov ax, [esi] // AX := source color + cmp ax, 0 + je @SkipColor // if AX=0 then skip everything + cmp ax, word ptr TransparentColor + je @SkipColor + and ax, [edi] + mov [edi], ax + @SkipColor: + add esi, 2 + add edi, 2 + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 24 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + mov WorkX, ax // WorkX := Src.w + add WorkX, ax // WorkX := Src.w * 2 + add WorkX, ax // WorkX := Src.w * 3 + @Loopx: + mov al, [esi] // AL := source color + and al, [edi] + mov [edi], al + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + 32 : + asm + mov _ebx, ebx + mov _esi, esi + mov _edi, edi + mov _esp, esp + mov esi, SrcAddr // ESI - Source Offset + mov edi, DestAddr // EDI - Destination Offset + mov ax, Src.h // WorkY := Src.h + mov WorkY, ax + @LoopY: + mov ax, Src.w + shl ax, 2 + mov WorkX, ax // WorkX := Src.w * 4 + @Loopx: + mov al, [esi] // AL := source color + and al, [edi] + mov [edi], al + inc esi + inc edi + dec WorkX + jnz @LoopX + add esi, SrcMod + add edi, DestMod + dec WorkY + jnz @LoopY + mov esp,_esp + mov edi,_edi + mov esi,_esi + mov ebx,_ebx + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DestSurface ); +end; + + +procedure SDL_GTSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); +var + R, G, B, Pixel1, Pixel2, TransparentColor : cardinal; + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DestSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DestSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DestSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + TransparentColor := Format.colorkey; + end; + with DestSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := Format.BitsPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DestSurface ); + WorkY := Src.h; + case bits of + 8 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt8( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt8( DestAddr )^; + if Pixel2 > 0 then + begin + if Pixel2 and $E0 > Pixel1 and $E0 then R := Pixel2 and $E0 else R := Pixel1 and $E0; + if Pixel2 and $1C > Pixel1 and $1C then G := Pixel2 and $1C else G := Pixel1 and $1C; + if Pixel2 and $03 > Pixel1 and $03 then B := Pixel2 and $03 else B := Pixel1 and $03; + + if R > $E0 then + R := $E0; + if G > $1C then + G := $1C; + if B > $03 then + B := $03; + PUInt8( DestAddr )^ := R or G or B; + end + else + PUInt8( DestAddr )^ := Pixel1; + end; + inc( SrcAddr ); + inc( DestAddr ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 15 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt16( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt16( DestAddr )^; + if Pixel2 > 0 then + begin + + if Pixel2 and $7C00 > Pixel1 and $7C00 then R := Pixel2 and $7C00 else R := Pixel1 and $7C00; + if Pixel2 and $03E0 > Pixel1 and $03E0 then G := Pixel2 and $03E0 else G := Pixel1 and $03E0; + if Pixel2 and $001F > Pixel1 and $001F then B := Pixel2 and $001F else B := Pixel1 and $001F; + + PUInt16( DestAddr )^ := R or G or B; + end + else + PUInt16( DestAddr )^ := Pixel1; + end; + inc( SrcAddr, 2 ); + inc( DestAddr, 2 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 16 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt16( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt16( DestAddr )^; + if Pixel2 > 0 then + begin + + if Pixel2 and $F800 > Pixel1 and $F800 then R := Pixel2 and $F800 else R := Pixel1 and $F800; + if Pixel2 and $07E0 > Pixel1 and $07E0 then G := Pixel2 and $07E0 else G := Pixel1 and $07E0; + if Pixel2 and $001F > Pixel1 and $001F then B := Pixel2 and $001F else B := Pixel1 and $001F; + + PUInt16( DestAddr )^ := R or G or B; + end + else + PUInt16( DestAddr )^ := Pixel1; + end; + inc( SrcAddr, 2 ); + inc( DestAddr, 2 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 24 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt32( SrcAddr )^ and $00FFFFFF; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt32( DestAddr )^ and $00FFFFFF; + if Pixel2 > 0 then + begin + + if Pixel2 and $FF0000 > Pixel1 and $FF0000 then R := Pixel2 and $FF0000 else R := Pixel1 and $FF0000; + if Pixel2 and $00FF00 > Pixel1 and $00FF00 then G := Pixel2 and $00FF00 else G := Pixel1 and $00FF00; + if Pixel2 and $0000FF > Pixel1 and $0000FF then B := Pixel2 and $0000FF else B := Pixel1 and $0000FF; + + PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or ( R or G or B ); + end + else + PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel1; + end; + inc( SrcAddr, 3 ); + inc( DestAddr, 3 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 32 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt32( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt32( DestAddr )^; + if Pixel2 > 0 then + begin + + if Pixel2 and $FF0000 > Pixel1 and $FF0000 then R := Pixel2 and $FF0000 else R := Pixel1 and $FF0000; + if Pixel2 and $00FF00 > Pixel1 and $00FF00 then G := Pixel2 and $00FF00 else G := Pixel1 and $00FF00; + if Pixel2 and $0000FF > Pixel1 and $0000FF then B := Pixel2 and $0000FF else B := Pixel1 and $0000FF; + + PUInt32( DestAddr )^ := R or G or B; + end + else + PUInt32( DestAddr )^ := Pixel1; + end; + inc( SrcAddr, 4 ); + inc( DestAddr, 4 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DestSurface ); +end; + + +procedure SDL_LTSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; + DestSurface : PSDL_Surface; DestRect : PSDL_Rect ); +var + R, G, B, Pixel1, Pixel2, TransparentColor : cardinal; + Src, Dest : TSDL_Rect; + Diff : integer; + SrcAddr, DestAddr : cardinal; + WorkX, WorkY : word; + SrcMod, DestMod : cardinal; + Bits : cardinal; +begin + if ( SrcSurface = nil ) or ( DestSurface = nil ) then + exit; // Remove this to make it faster + if ( SrcSurface.Format.BitsPerPixel <> DestSurface.Format.BitsPerPixel ) then + exit; // Remove this to make it faster + if SrcRect = nil then + begin + with Src do + begin + x := 0; + y := 0; + w := SrcSurface.w; + h := SrcSurface.h; + end; + end + else + Src := SrcRect^; + if DestRect = nil then + begin + Dest.x := 0; + Dest.y := 0; + end + else + Dest := DestRect^; + Dest.w := Src.w; + Dest.h := Src.h; + with DestSurface.Clip_Rect do + begin + // Source's right side is greater than the dest.cliprect + if Dest.x + Src.w > x + w then + begin + smallint( Src.w ) := x + w - Dest.x; + smallint( Dest.w ) := x + w - Dest.x; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's bottom side is greater than the dest.clip + if Dest.y + Src.h > y + h then + begin + smallint( Src.h ) := y + h - Dest.y; + smallint( Dest.h ) := y + h - Dest.y; + if smallint( Dest.h ) < 1 then + exit; + end; + // Source's left side is less than the dest.clip + if Dest.x < x then + begin + Diff := x - Dest.x; + Src.x := Src.x + Diff; + smallint( Src.w ) := smallint( Src.w ) - Diff; + Dest.x := x; + smallint( Dest.w ) := smallint( Dest.w ) - Diff; + if smallint( Dest.w ) < 1 then + exit; + end; + // Source's Top side is less than the dest.clip + if Dest.y < y then + begin + Diff := y - Dest.y; + Src.y := Src.y + Diff; + smallint( Src.h ) := smallint( Src.h ) - Diff; + Dest.y := y; + smallint( Dest.h ) := smallint( Dest.h ) - Diff; + if smallint( Dest.h ) < 1 then + exit; + end; + end; + with SrcSurface^ do + begin + SrcAddr := cardinal( Pixels ) + UInt32( Src.y ) * Pitch + UInt32( Src.x ) * + Format.BytesPerPixel; + SrcMod := Pitch - Src.w * Format.BytesPerPixel; + TransparentColor := Format.colorkey; + end; + with DestSurface^ do + begin + DestAddr := cardinal( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) * + Format.BytesPerPixel; + DestMod := Pitch - Dest.w * Format.BytesPerPixel; + Bits := Format.BitsPerPixel; + end; + SDL_LockSurface( SrcSurface ); + SDL_LockSurface( DestSurface ); + WorkY := Src.h; + case bits of + 8 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt8( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt8( DestAddr )^; + if Pixel2 > 0 then + begin + if Pixel2 and $E0 < Pixel1 and $E0 then R := Pixel2 and $E0 else R := Pixel1 and $E0; + if Pixel2 and $1C < Pixel1 and $1C then G := Pixel2 and $1C else G := Pixel1 and $1C; + if Pixel2 and $03 < Pixel1 and $03 then B := Pixel2 and $03 else B := Pixel1 and $03; + + if R > $E0 then + R := $E0; + if G > $1C then + G := $1C; + if B > $03 then + B := $03; + PUInt8( DestAddr )^ := R or G or B; + end + else + PUInt8( DestAddr )^ := Pixel1; + end; + inc( SrcAddr ); + inc( DestAddr ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 15 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt16( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt16( DestAddr )^; + if Pixel2 > 0 then + begin + + if Pixel2 and $7C00 < Pixel1 and $7C00 then R := Pixel2 and $7C00 else R := Pixel1 and $7C00; + if Pixel2 and $03E0 < Pixel1 and $03E0 then G := Pixel2 and $03E0 else G := Pixel1 and $03E0; + if Pixel2 and $001F < Pixel1 and $001F then B := Pixel2 and $001F else B := Pixel1 and $001F; + + PUInt16( DestAddr )^ := R or G or B; + end + else + PUInt16( DestAddr )^ := Pixel1; + end; + inc( SrcAddr, 2 ); + inc( DestAddr, 2 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 16 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt16( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt16( DestAddr )^; + if Pixel2 > 0 then + begin + + if Pixel2 and $F800 < Pixel1 and $F800 then R := Pixel2 and $F800 else R := Pixel1 and $F800; + if Pixel2 and $07E0 < Pixel1 and $07E0 then G := Pixel2 and $07E0 else G := Pixel1 and $07E0; + if Pixel2 and $001F < Pixel1 and $001F then B := Pixel2 and $001F else B := Pixel1 and $001F; + + PUInt16( DestAddr )^ := R or G or B; + end + else + PUInt16( DestAddr )^ := Pixel1; + end; + inc( SrcAddr, 2 ); + inc( DestAddr, 2 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 24 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt32( SrcAddr )^ and $00FFFFFF; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt32( DestAddr )^ and $00FFFFFF; + if Pixel2 > 0 then + begin + + if Pixel2 and $FF0000 < Pixel1 and $FF0000 then R := Pixel2 and $FF0000 else R := Pixel1 and $FF0000; + if Pixel2 and $00FF00 < Pixel1 and $00FF00 then G := Pixel2 and $00FF00 else G := Pixel1 and $00FF00; + if Pixel2 and $0000FF < Pixel1 and $0000FF then B := Pixel2 and $0000FF else B := Pixel1 and $0000FF; + + PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or ( R or G or B ); + end + else + PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel1; + end; + inc( SrcAddr, 3 ); + inc( DestAddr, 3 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + 32 : + begin + repeat + WorkX := Src.w; + repeat + Pixel1 := PUInt32( SrcAddr )^; + if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then + begin + Pixel2 := PUInt32( DestAddr )^; + if Pixel2 > 0 then + begin + + if Pixel2 and $FF0000 < Pixel1 and $FF0000 then R := Pixel2 and $FF0000 else R := Pixel1 and $FF0000; + if Pixel2 and $00FF00 < Pixel1 and $00FF00 then G := Pixel2 and $00FF00 else G := Pixel1 and $00FF00; + if Pixel2 and $0000FF < Pixel1 and $0000FF then B := Pixel2 and $0000FF else B := Pixel1 and $0000FF; + + PUInt32( DestAddr )^ := R or G or B; + end + else + PUInt32( DestAddr )^ := Pixel1; + end; + inc( SrcAddr, 4 ); + inc( DestAddr, 4 ); + dec( WorkX ); + until WorkX = 0; + inc( SrcAddr, SrcMod ); + inc( DestAddr, DestMod ); + dec( WorkY ); + until WorkY = 0; + end; + end; + SDL_UnlockSurface( SrcSurface ); + SDL_UnlockSurface( DestSurface ); +end; + +function SDL_ClipLine(var x1,y1,x2,y2: Integer; ClipRect: PSDL_Rect) : boolean; +var tflag, flag1, flag2: word; + txy, xedge, yedge: Integer; + slope: single; + + function ClipCode(x,y: Integer): word; + begin + Result := 0; + if x < ClipRect.x then Result := 1; + if x >= ClipRect.w + ClipRect.x then Result := Result or 2; + if y < ClipRect.y then Result := Result or 4; + if y >= ClipRect.h + ClipRect.y then Result := Result or 8; + end; + +begin + flag1 := ClipCode(x1,y1); + flag2 := ClipCode(x2,y2); + result := true; + + while true do + begin + if (flag1 or flag2) = 0 then Exit; // all in + + if (flag1 and flag2) <> 0 then + begin + result := false; + Exit; // all out + end; + + if flag2 = 0 then + begin + txy := x1; x1 := x2; x2 := txy; + txy := y1; y1 := y2; y2 := txy; + tflag := flag1; flag1 := flag2; flag2 := tflag; + end; + + if (flag2 and 3) <> 0 then + begin + if (flag2 and 1) <> 0 then + xedge := ClipRect.x + else + xedge := ClipRect.w + ClipRect.x -1; // back 1 pixel otherwise we end up in a loop + + slope := (y2 - y1) / (x2 - x1); + y2 := y1 + Round(slope * (xedge - x1)); + x2 := xedge; + end + else + begin + if (flag2 and 4) <> 0 then + yedge := ClipRect.y + else + yedge := ClipRect.h + ClipRect.y -1; // up 1 pixel otherwise we end up in a loop + + slope := (x2 - x1) / (y2 - y1); + x2 := x1 + Round(slope * (yedge - y1)); + y2 := yedge; + end; + + flag2 := ClipCode(x2, y2); + end; +end; + +end. + + |