diff options
Diffstat (limited to '')
| -rw-r--r-- | Game/Code/lib/JEDI-SDL/SDL/Pas/sdlutils.pas | 4361 |
1 files changed, 4361 insertions, 0 deletions
diff --git a/Game/Code/lib/JEDI-SDL/SDL/Pas/sdlutils.pas b/Game/Code/lib/JEDI-SDL/SDL/Pas/sdlutils.pas new file mode 100644 index 00000000..b15fa9ba --- /dev/null +++ b/Game/Code/lib/JEDI-SDL/SDL/Pas/sdlutils.pas @@ -0,0 +1,4361 @@ +unit sdlutils;
+{
+ $Id: sdlutils.pas,v 1.5 2006/11/19 18:56:44 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 }
+{ }
+{ April 26 2003 - SS : Incorporated JF's changes to SDL_ClipLine }
+{ Fixed SDL_ClipLine bug for non-zero cliprect x, y }
+{ Added overloaded SDL_DrawLine for dashed lines }
+{ }
+{******************************************************************************}
+{
+ $Log: sdlutils.pas,v $
+ Revision 1.5 2006/11/19 18:56:44 savage
+ Removed Hints and Warnings.
+
+ Revision 1.4 2004/06/02 19:38:53 savage
+ Changes to SDL_GradientFillRect as suggested by
+ Ángel Eduardo García Hernández. Many thanks.
+
+ Revision 1.3 2004/05/29 23:11:54 savage
+ Changes to SDL_ScaleSurfaceRect as suggested by
+ Ángel Eduardo García Hernández to fix a colour issue with the function. Many thanks.
+
+ 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 : integer; y : integer ) : Uint32;
+
+procedure SDL_PutPixel( DstSurface : PSDL_Surface; x : integer; y : integer; pixel :
+ Uint32 );
+
+procedure SDL_AddPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; Color :
+ cardinal );
+
+procedure SDL_SubPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; 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;
+ DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
+
+procedure SDL_SubSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
+ DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
+
+procedure SDL_MonoSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
+ DestSurface : PSDL_Surface; DestRect : PSDL_Rect; Color : cardinal );
+
+procedure SDL_TexturedSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
+ DestSurface : 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;
+
+procedure SDL_AddPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; Color :
+ cardinal );
+var
+ SrcColor : cardinal;
+ Addr : cardinal;
+ R, G, B : cardinal;
+begin
+ if Color = 0 then
+ exit;
+ with DstSurface^ do
+ begin
+ Addr := cardinal( Pixels ) + y * Pitch + x * format.BytesPerPixel;
+ SrcColor := PUInt32( Addr )^;
+ case format.BitsPerPixel of
+ 8 :
+ begin
+ 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;
+ end;
+ 15 :
+ begin
+ 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;
+ end;
+ 16 :
+ begin
+ 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;
+ end;
+ 24 :
+ begin
+ 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;
+ end;
+ 32 :
+ begin
+ 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;
+ end;
+ end;
+ end;
+end;
+
+procedure SDL_SubPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; Color :
+ cardinal );
+var
+ SrcColor : cardinal;
+ Addr : cardinal;
+ R, G, B : cardinal;
+begin
+ if Color = 0 then
+ exit;
+ with DstSurface^ do
+ begin
+ Addr := cardinal( Pixels ) + y * Pitch + x * format.BytesPerPixel;
+ SrcColor := PUInt32( Addr )^;
+ case format.BitsPerPixel of
+ 8 :
+ begin
+ 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;
+ end;
+ 15 :
+ begin
+ 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;
+ end;
+ 16 :
+ begin
+ 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;
+ end;
+ 24 :
+ begin
+ 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;
+ end;
+ 32 :
+ begin
+ 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;
+ end;
+ 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;
+ 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
+ R := Pixel1 and $E0 + Pixel2 and $E0;
+ G := Pixel1 and $1C + Pixel2 and $1C;
+ B := Pixel1 and $03 + Pixel2 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
+ R := Pixel1 and $7C00 + Pixel2 and $7C00;
+ G := Pixel1 and $03E0 + Pixel2 and $03E0;
+ B := Pixel1 and $001F + Pixel2 and $001F;
+ if R > $7C00 then
+ R := $7C00;
+ if G > $03E0 then
+ G := $03E0;
+ if B > $001F then
+ B := $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
+ R := Pixel1 and $F800 + Pixel2 and $F800;
+ G := Pixel1 and $07E0 + Pixel2 and $07E0;
+ B := Pixel1 and $001F + Pixel2 and $001F;
+ if R > $F800 then
+ R := $F800;
+ if G > $07E0 then
+ G := $07E0;
+ if B > $001F then
+ B := $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
+ R := Pixel1 and $FF0000 + Pixel2 and $FF0000;
+ G := Pixel1 and $00FF00 + Pixel2 and $00FF00;
+ B := Pixel1 and $0000FF + Pixel2 and $0000FF;
+ if R > $FF0000 then
+ R := $FF0000;
+ if G > $00FF00 then
+ G := $00FF00;
+ if B > $0000FF then
+ B := $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
+ R := Pixel1 and $FF0000 + Pixel2 and $FF0000;
+ G := Pixel1 and $00FF00 + Pixel2 and $00FF00;
+ B := Pixel1 and $0000FF + Pixel2 and $0000FF;
+ if R > $FF0000 then
+ R := $FF0000;
+ if G > $00FF00 then
+ G := $00FF00;
+ if B > $0000FF then
+ B := $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_SubSurface( 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;
+ _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 := DestSurface.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
+ R := Pixel2 and $E0 - Pixel1 and $E0;
+ G := Pixel2 and $1C - Pixel1 and $1C;
+ B := Pixel2 and $03 - Pixel1 and $03;
+ if R > $E0 then
+ R := 0;
+ if G > $1C then
+ G := 0;
+ if B > $03 then
+ B := 0;
+ PUInt8( DestAddr )^ := R or G or B;
+ end;
+ 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
+ R := Pixel2 and $7C00 - Pixel1 and $7C00;
+ G := Pixel2 and $03E0 - Pixel1 and $03E0;
+ B := Pixel2 and $001F - Pixel1 and $001F;
+ if R > $7C00 then
+ R := 0;
+ if G > $03E0 then
+ G := 0;
+ if B > $001F then
+ B := 0;
+ PUInt16( DestAddr )^ := R or G or B;
+ end;
+ 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
+ R := Pixel2 and $F800 - Pixel1 and $F800;
+ G := Pixel2 and $07E0 - Pixel1 and $07E0;
+ B := Pixel2 and $001F - Pixel1 and $001F;
+ if R > $F800 then
+ R := 0;
+ if G > $07E0 then
+ G := 0;
+ if B > $001F then
+ B := 0;
+ PUInt16( DestAddr )^ := R or G or B;
+ end;
+ 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
+ R := Pixel2 and $FF0000 - Pixel1 and $FF0000;
+ G := Pixel2 and $00FF00 - Pixel1 and $00FF00;
+ B := Pixel2 and $0000FF - Pixel1 and $0000FF;
+ if R > $FF0000 then
+ R := 0;
+ if G > $00FF00 then
+ G := 0;
+ if B > $0000FF then
+ B := 0;
+ PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or ( R or G or B );
+ end;
+ 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
+ R := Pixel2 and $FF0000 - Pixel1 and $FF0000;
+ G := Pixel2 and $00FF00 - Pixel1 and $00FF00;
+ B := Pixel2 and $0000FF - Pixel1 and $0000FF;
+ if R > $FF0000 then
+ R := 0;
+ if G > $00FF00 then
+ G := 0;
+ if B > $0000FF then
+ B := 0;
+ PUInt32( DestAddr )^ := R or G or B;
+ end
+ else
+ PUInt32( DestAddr )^ := Pixel2;
+ 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_MonoSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
+ DestSurface : 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;
+ TransparentColor, SrcColor : cardinal;
+ BPP : 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;
+ BPP := DestSurface.Format.BytesPerPixel;
+ end;
+ SDL_LockSurface( SrcSurface );
+ SDL_LockSurface( DestSurface );
+ WorkY := Src.h;
+ case BPP of
+ 1 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt8( SrcAddr )^;
+ if SrcColor <> TransparentColor then
+ PUInt8( DestAddr )^ := SrcColor;
+ inc( SrcAddr );
+ inc( DestAddr );
+ dec( WorkX );
+ until WorkX = 0;
+ inc( SrcAddr, SrcMod );
+ inc( DestAddr, DestMod );
+ dec( WorkY );
+ until WorkY = 0;
+ end;
+ 2 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt16( SrcAddr )^;
+ if SrcColor <> TransparentColor then
+ PUInt16( DestAddr )^ := SrcColor;
+ inc( SrcAddr );
+ inc( DestAddr );
+ dec( WorkX );
+ until WorkX = 0;
+ inc( SrcAddr, SrcMod );
+ inc( DestAddr, DestMod );
+ dec( WorkY );
+ until WorkY = 0;
+ end;
+ 3 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt32( SrcAddr )^ and $FFFFFF;
+ if SrcColor <> TransparentColor then
+ PUInt32( DestAddr )^ := ( PUInt32( DestAddr )^ and $FFFFFF ) or SrcColor;
+ inc( SrcAddr );
+ inc( DestAddr );
+ dec( WorkX );
+ until WorkX = 0;
+ inc( SrcAddr, SrcMod );
+ inc( DestAddr, DestMod );
+ dec( WorkY );
+ until WorkY = 0;
+ end;
+ 4 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt32( SrcAddr )^;
+ if SrcColor <> TransparentColor then
+ PUInt32( DestAddr )^ := SrcColor;
+ inc( SrcAddr );
+ inc( DestAddr );
+ 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;
+// 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;
+ DestSurface : 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;
+ SrcColor, TransparentColor, TextureColor : cardinal;
+ BPP : 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;
+ BPP := DestSurface.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( DestSurface );
+ SDL_LockSurface( Texture );
+ WorkY := Src.h;
+ case BPP of
+ 1 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt8( SrcAddr )^;
+ if SrcColor <> TransparentColor then
+ PUInt8( DestAddr )^ := PUint8( TextAddr )^;
+ inc( SrcAddr );
+ inc( DestAddr );
+ inc( TextAddr );
+ dec( WorkX );
+ until WorkX = 0;
+ inc( SrcAddr, SrcMod );
+ inc( DestAddr, DestMod );
+ inc( TextAddr, TextMod );
+ dec( WorkY );
+ until WorkY = 0;
+ end;
+ 2 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt16( SrcAddr )^;
+ if SrcColor <> TransparentColor then
+ PUInt16( DestAddr )^ := PUInt16( TextAddr )^;
+ inc( SrcAddr );
+ inc( DestAddr );
+ inc( TextAddr );
+ dec( WorkX );
+ until WorkX = 0;
+ inc( SrcAddr, SrcMod );
+ inc( DestAddr, DestMod );
+ inc( TextAddr, TextMod );
+ dec( WorkY );
+ until WorkY = 0;
+ end;
+ 3 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt32( SrcAddr )^ and $FFFFFF;
+ if SrcColor <> TransparentColor then
+ PUInt32( DestAddr )^ := ( PUInt32( DestAddr )^ and $FFFFFF ) or ( PUInt32( TextAddr )^ and $FFFFFF );
+ inc( SrcAddr );
+ inc( DestAddr );
+ inc( TextAddr );
+ dec( WorkX );
+ until WorkX = 0;
+ inc( SrcAddr, SrcMod );
+ inc( DestAddr, DestMod );
+ inc( TextAddr, TextMod );
+ dec( WorkY );
+ until WorkY = 0;
+ end;
+ 4 :
+ begin
+ repeat
+ WorkX := Src.w;
+ repeat
+ SrcColor := PUInt32( SrcAddr )^;
+ if SrcColor <> TransparentColor then
+ PUInt32( DestAddr )^ := PUInt32( TextAddr )^;
+ inc( SrcAddr );
+ inc( DestAddr );
+ inc( TextAddr );
+ dec( WorkX );
+ until WorkX = 0;
+ inc( SrcAddr, SrcMod );
+ inc( DestAddr, DestMod );
+ inc( TextAddr, TextMod );
+ dec( WorkY );
+ until WorkY = 0;
+ end;
+ end;
+ SDL_UnlockSurface( SrcSurface );
+ SDL_UnlockSurface( DestSurface );
+ 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;
+
+// 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;
+
+// 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_MoveLine( Surface : PSDL_Surface; x1, x2, y1, xofs, depth : integer );
+var
+ src_pixels, dst_pixels : PUint8;
+ i : integer;
+begin
+ src_pixels := PUint8( integer( Surface^.pixels ) + Surface^.w * y1 * depth + x2 *
+ depth );
+ dst_pixels := PUint8( integer( Surface^.pixels ) + Surface^.w * y1 * depth + ( x2
+ + xofs ) * depth );
+ for i := x2 downto x1 do
+ begin
+ move( src_pixels^, dst_pixels^, depth );
+ dec( src_pixels );
+ dec( dst_pixels );
+ end;
+end;
+{ Return the pixel value at (x, y)
+NOTE: The surface must be locked before calling this! }
+
+function SDL_GetPixel( SrcSurface : PSDL_Surface; x : integer; y : integer ) : 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;
+{ Set the pixel at (x, y) to the given value
+ NOTE: The surface must be locked before calling this! }
+
+procedure SDL_PutPixel( DstSurface : PSDL_Surface; x : integer; y : integer; pixel :
+ Uint32 );
+var
+ bpp : UInt32;
+ p : PInteger;
+begin
+ bpp := DstSurface.format.BytesPerPixel;
+ p := Pointer( Uint32( DstSurface.pixels ) + UInt32( y ) * DstSurface.pitch + UInt32( x )
+ * bpp );
+ case bpp of
+ 1 : PUint8( p )^ := pixel;
+ 2 : PUint16( p )^ := pixel;
+ 3 :
+ if ( SDL_BYTEORDER = SDL_BIG_ENDIAN ) then
+ begin
+ PUInt8Array( p )[ 0 ] := ( pixel shr 16 ) and $FF;
+ PUInt8Array( p )[ 1 ] := ( pixel shr 8 ) and $FF;
+ PUInt8Array( p )[ 2 ] := pixel and $FF;
+ end
+ else
+ begin
+ PUInt8Array( p )[ 0 ] := pixel and $FF;
+ PUInt8Array( p )[ 1 ] := ( pixel shr 8 ) and $FF;
+ PUInt8Array( p )[ 2 ] := ( pixel shr 16 ) and $FF;
+ end;
+ 4 :
+ PUint32( p )^ := pixel;
+ end;
+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_ScrollY(Surface: PSDL_Surface; DifY: integer);
+var
+ r1, r2: TSDL_Rect;
+ buffer: PSDL_Surface;
+begin
+ if (Surface <> nil) and (Dify <> 0) then
+ begin
+ buffer := SDL_CreateRGBSurface(SDL_HWSURFACE, (Surface^.w - DifY) * 2,
+ Surface^.h * 2,
+ Surface^.Format^.BitsPerPixel, 0, 0, 0, 0);
+ if buffer <> nil then
+ begin
+ if (buffer^.format^.BytesPerPixel = 1) then
+ SDL_SetColors(buffer, @Surface^.format^.palette^.colors^[0], 0, 256);
+ r1 := SDLRect(0, DifY, buffer^.w, buffer^.h);
+ r2 := SDLRect(0, 0, buffer^.w, buffer^.h);
+ SDL_BlitSurface(Surface, @r1, buffer, @r2);
+ SDL_BlitSurface(buffer, @r2, Surface, @r2);
+ SDL_FreeSurface(buffer);
+ 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(DestSurface.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 : 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;
+
+ case Src.format.BytesPerPixel of
+ 1 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt8( WriteAddr )^ := PUInt8( ReadAddr )^;
+ PUInt8( WriteAddr + 1 )^ := PUInt8( ReadAddr )^;
+ PUInt8( WriteAddr + DestPitch )^ := PUInt8( ReadAddr )^;
+ PUInt8( WriteAddr + DestPitch + 1 )^ := PUInt8( ReadAddr )^;
+ inc( ReadAddr );
+ inc( WriteAddr, 2 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 2 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt16( WriteAddr )^ := PUInt16( ReadAddr )^;
+ PUInt16( WriteAddr + 2 )^ := PUInt16( ReadAddr )^;
+ PUInt16( WriteAddr + DestPitch )^ := PUInt16( ReadAddr )^;
+ PUInt16( WriteAddr + DestPitch + 2 )^ := PUInt16( ReadAddr )^;
+ inc( ReadAddr, 2 );
+ inc( WriteAddr, 4 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 3 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt32( WriteAddr )^ := ( PUInt32( WriteAddr )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
+ PUInt32( WriteAddr + 3 )^ := ( PUInt32( WriteAddr + 3 )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
+ PUInt32( WriteAddr + DestPitch )^ := ( PUInt32( WriteAddr + DestPitch )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
+ PUInt32( WriteAddr + DestPitch + 3 )^ := ( PUInt32( WriteAddr + DestPitch + 3 )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
+ inc( ReadAddr, 3 );
+ inc( WriteAddr, 6 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 4 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt32( WriteAddr )^ := PUInt32( ReadAddr )^;
+ PUInt32( WriteAddr + 4 )^ := PUInt32( ReadAddr )^;
+ PUInt32( WriteAddr + DestPitch )^ := PUInt32( ReadAddr )^;
+ PUInt32( WriteAddr + DestPitch + 4 )^ := PUInt32( ReadAddr )^;
+ inc( ReadAddr, 4 );
+ inc( WriteAddr, 8 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ 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 : 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;
+
+ case Src.format.BytesPerPixel of
+ 1 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt8( WriteAddr )^ := PUInt8( ReadAddr )^;
+ PUInt8( WriteAddr + 1 )^ := PUInt8( ReadAddr )^;
+ inc( ReadAddr );
+ inc( WriteAddr, 2 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 2 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt16( WriteAddr )^ := PUInt16( ReadAddr )^;
+ PUInt16( WriteAddr + 2 )^ := PUInt16( ReadAddr )^;
+ inc( ReadAddr, 2 );
+ inc( WriteAddr, 4 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 3 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt32( WriteAddr )^ := ( PUInt32( WriteAddr )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
+ PUInt32( WriteAddr + 3 )^ := ( PUInt32( WriteAddr + 3 )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
+ inc( ReadAddr, 3 );
+ inc( WriteAddr, 6 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 4 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ PUInt32( WriteAddr )^ := PUInt32( ReadAddr )^;
+ PUInt32( WriteAddr + 4 )^ := PUInt32( ReadAddr )^;
+ inc( ReadAddr, 4 );
+ inc( WriteAddr, 8 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ 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, Color : 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;
+
+ case Src.format.BitsPerPixel of
+ 8 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ Color := PUInt8( ReadAddr )^;
+ PUInt8( WriteAddr )^ := Color;
+ PUInt8( WriteAddr + 1 )^ := Color;
+ Color := ( Color shr 1 ) and $6D; {%01101101}
+ PUInt8( WriteAddr + DestPitch )^ := Color;
+ PUInt8( WriteAddr + DestPitch + 1 )^ := Color;
+ inc( ReadAddr );
+ inc( WriteAddr, 2 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 15 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ Color := PUInt16( ReadAddr )^;
+ PUInt16( WriteAddr )^ := Color;
+ PUInt16( WriteAddr + 2 )^ := Color;
+ Color := ( Color shr 1 ) and $3DEF; {%0011110111101111}
+ PUInt16( WriteAddr + DestPitch )^ := Color;
+ PUInt16( WriteAddr + DestPitch + 2 )^ := Color;
+ inc( ReadAddr, 2 );
+ inc( WriteAddr, 4 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 16 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ Color := PUInt16( ReadAddr )^;
+ PUInt16( WriteAddr )^ := Color;
+ PUInt16( WriteAddr + 2 )^ := Color;
+ Color := ( Color shr 1 ) and $7BEF; {%0111101111101111}
+ PUInt16( WriteAddr + DestPitch )^ := Color;
+ PUInt16( WriteAddr + DestPitch + 2 )^ := Color;
+ inc( ReadAddr, 2 );
+ inc( WriteAddr, 4 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 24 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ Color := ( PUInt32( WriteAddr )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
+ PUInt32( WriteAddr )^ := Color;
+ PUInt32( WriteAddr + 3 )^ := Color;
+ Color := ( Color shr 1 ) and $007F7F7F; {%011111110111111101111111}
+ PUInt32( WriteAddr + DestPitch )^ := Color;
+ PUInt32( WriteAddr + DestPitch + 3 )^ := Color;
+ inc( ReadAddr, 3 );
+ inc( WriteAddr, 6 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ end;
+ 32 : for y := 1 to Src.h do
+ begin
+ ReadAddr := ReadRow;
+ WriteAddr := WriteRow;
+ for x := 1 to Src.w do
+ begin
+ Color := PUInt32( ReadAddr )^;
+ PUInt32( WriteAddr )^ := Color;
+ PUInt32( WriteAddr + 4 )^ := Color;
+ Color := ( Color shr 1 ) and $7F7F7F7F;
+ PUInt32( WriteAddr + DestPitch )^ := Color;
+ PUInt32( WriteAddr + DestPitch + 4 )^ := Color;
+ inc( ReadAddr, 4 );
+ inc( WriteAddr, 8 );
+ end;
+ inc( UInt32( ReadRow ), SrcPitch );
+ inc( UInt32( WriteRow ), DestPitch * 2 );
+ 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
+ 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 )^;
+ PUInt8( DestAddr )^ := Pixel2 or 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 )^;
+
+ PUInt16( DestAddr )^ := Pixel2 or 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 )^;
+
+ PUInt16( DestAddr )^ := Pixel2 or 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;
+
+ PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel2 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 )^;
+
+ PUInt32( DestAddr )^ := Pixel2 or 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_ANDSurface( 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 )^;
+ PUInt8( DestAddr )^ := Pixel2 and 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 )^;
+
+ PUInt16( DestAddr )^ := Pixel2 and 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 )^;
+
+ PUInt16( DestAddr )^ := Pixel2 and 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;
+
+ PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel2 and 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 )^;
+
+ PUInt32( DestAddr )^ := Pixel2 and 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_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;
+
+// Will clip the x1,x2,y1,x2 params to the ClipRect provided
+
+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.
+
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