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