unit sdlutils;
{
$Id: sdlutils.pas,v 1.5 2006/11/19 18:56:44 savage Exp $
}
{******************************************************************************}
{ }
{ Borland Delphi SDL - Simple DirectMedia Layer }
{ SDL Utility functions }
{ }
{ }
{ The initial developer of this Pascal code was : }
{ Tom Jones <tigertomjones@gmx.de> }
{ }
{ Portions created by Tom Jones are }
{ Copyright (C) 2000 - 2001 Tom Jones. }
{ }
{ }
{ Contributor(s) }
{ -------------- }
{ Dominique Louis <Dominique@SavageSoftware.com.au> }
{ 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 }
{ }
{ April 26 2003 - SS : Incorporated JF's changes to SDL_ClipLine }
{ Fixed SDL_ClipLine bug for non-zero cliprect x, y }
{ Added overloaded SDL_DrawLine for dashed lines }
{ }
{******************************************************************************}
{
$Log: sdlutils.pas,v $
Revision 1.5 2006/11/19 18:56:44 savage
Removed Hints and Warnings.
Revision 1.4 2004/06/02 19:38:53 savage
Changes to SDL_GradientFillRect as suggested by
�ngel Eduardo Garc�a Hern�ndez. Many thanks.
Revision 1.3 2004/05/29 23:11:54 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 1.2 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,
{$IFNDEF DARWIN}
Xlib,
{$ENDIF}
{$ENDIF}
SysUtils,
sdl;
type
TGradientStyle = ( gsHorizontal, gsVertical );
// Pixel procedures
function SDL_PixelTest( SrcSurface1 : PSDL_Surface; SrcRect1 : PSDL_Rect; SrcSurface2 :
PSDL_Surface; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) : Boolean;
function SDL_GetPixel( SrcSurface : PSDL_Surface; x : integer; y : integer ) : Uint32;
procedure SDL_PutPixel( DstSurface : PSDL_Surface; x : integer; y : integer; pixel :
Uint32 );
procedure SDL_AddPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; Color :
cardinal );
procedure SDL_SubPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; Color :
cardinal );
// Line procedures
procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal ); overload;
procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal; DashLength, DashSpace : byte ); overload;
procedure SDL_AddLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal );
procedure SDL_SubLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal );
// Surface procedures
procedure SDL_AddSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
procedure SDL_SubSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
procedure SDL_MonoSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect; Color : cardinal );
procedure SDL_TexturedSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect; Texture : PSDL_Surface;
TextureRect : PSDL_Rect );
procedure SDL_ZoomSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; DstRect : PSDL_Rect );
procedure SDL_WarpSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; UL, UR, LR, LL : PPoint );
// Flip procedures
procedure SDL_FlipRectH( DstSurface : PSDL_Surface; Rect : PSDL_Rect );
procedure SDL_FlipRectV( DstSurface : PSDL_Surface; Rect : PSDL_Rect );
function PSDLRect( aLeft, aTop, aWidth, aHeight : integer ) : PSDL_Rect;
function SDLRect( aLeft, aTop, aWidth, aHeight : integer ) : TSDL_Rect; overload;
function SDLRect( aRect : TRect ) : TSDL_Rect; overload;
function SDL_ScaleSurfaceRect( SrcSurface : PSDL_Surface; SrcX1, SrcY1, SrcW, SrcH,
Width, Height : integer ) : PSDL_Surface;
procedure SDL_ScrollY( DstSurface : PSDL_Surface; DifY : integer );
procedure SDL_ScrollX( DstSurface : PSDL_Surface; DifX : integer );
procedure SDL_RotateDeg( DstSurface, SrcSurface : PSDL_Surface; SrcRect :
PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Integer );
procedure SDL_RotateRad( DstSurface, SrcSurface : PSDL_Surface; SrcRect :
PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Single );
function ValidateSurfaceRect( DstSurface : PSDL_Surface; dstrect : PSDL_Rect ) : TSDL_Rect;
// Fill Rect routine
procedure SDL_FillRectAdd( DstSurface : PSDL_Surface; dstrect : PSDL_Rect; color : UInt32 );
procedure SDL_FillRectSub( DstSurface : PSDL_Surface; dstrect : PSDL_Rect; color : UInt32 );
procedure SDL_GradientFillRect( DstSurface : PSDL_Surface; const Rect : PSDL_Rect; const StartColor, EndColor : TSDL_Color; const Style : TGradientStyle );
// NOTE for All SDL_2xblit... function : the dest surface must be 2x of the source surface!
procedure SDL_2xBlit( Src, Dest : PSDL_Surface );
procedure SDL_Scanline2xBlit( Src, Dest : PSDL_Surface );
procedure SDL_50Scanline2xBlit( Src, Dest : PSDL_Surface );
//
function SDL_PixelTestSurfaceVsRect( SrcSurface1 : PSDL_Surface; SrcRect1 :
PSDL_Rect; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) :
boolean;
// Jason's boolean Surface functions
procedure SDL_ORSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
procedure SDL_ANDSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
procedure SDL_GTSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
procedure SDL_LTSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
function SDL_ClipLine( var x1, y1, x2, y2 : Integer; ClipRect : PSDL_Rect ) : boolean;
implementation
uses
Math;
function SDL_PixelTest( SrcSurface1 : PSDL_Surface; SrcRect1 : PSDL_Rect; SrcSurface2 :
PSDL_Surface; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) : boolean;
var
Src_Rect1, Src_Rect2 : TSDL_Rect;
right1, bottom1 : integer;
right2, bottom2 : integer;
Scan1Start, Scan2Start, ScanWidth, ScanHeight : cardinal;
Mod1, Mod2 : cardinal;
Addr1, Addr2 : PtrUInt;
BPP : cardinal;
Pitch1, Pitch2 : cardinal;
TransparentColor1, TransparentColor2 : cardinal;
tx, ty : cardinal;
// StartTick : cardinal; // Auto Removed, Unused Variable
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 := PtrUInt( 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 := PtrUInt( Pixels );
inc( Addr2, Pitch2 * UInt32( Src_Rect2.y ) );
end;
Mod1 := Pitch1 - ( ScanWidth * BPP );
Mod2 := Pitch2 - ( ScanWidth * BPP );
inc( Addr1, BPP * Scan1Start );
inc( Addr2, BPP * Scan2Start );
if Top1 <= Top2 then
begin
// 1. up, 2. down
ScanHeight := Bottom1 - Top2;
if ScanHeight > Src_Rect2.h then
ScanHeight := Src_Rect2.h;
inc( Addr1, Pitch1 * UInt32( Top2 - Top1 ) );
end
else
begin
// 1. down, 2. up
ScanHeight := Bottom2 - Top1;
if ScanHeight > Src_Rect1.h then
ScanHeight := Src_Rect1.h;
inc( Addr2, Pitch2 * UInt32( Top1 - Top2 ) );
end;
case BPP of
1 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
if ( PByte( Addr1 )^ <> TransparentColor1 ) and ( PByte( Addr2 )^ <>
TransparentColor2 ) then
begin
Result := true;
exit;
end;
inc( Addr1 );
inc( Addr2 );
end;
inc( Addr1, Mod1 );
inc( Addr2, Mod2 );
end;
2 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
if ( PWord( Addr1 )^ <> TransparentColor1 ) and ( PWord( Addr2 )^ <>
TransparentColor2 ) then
begin
Result := true;
exit;
end;
inc( Addr1, 2 );
inc( Addr2, 2 );
end;
inc( Addr1, Mod1 );
inc( Addr2, Mod2 );
end;
3 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
Color1 := PLongWord( Addr1 )^ and $00FFFFFF;
Color2 := PLongWord( Addr2 )^ and $00FFFFFF;
if ( Color1 <> TransparentColor1 ) and ( Color2 <> TransparentColor2 )
then
begin
Result := true;
exit;
end;
inc( Addr1, 3 );
inc( Addr2, 3 );
end;
inc( Addr1, Mod1 );
inc( Addr2, Mod2 );
end;
4 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
if ( PLongWord( Addr1 )^ <> TransparentColor1 ) and ( PLongWord( Addr2 )^ <>
TransparentColor2 ) then
begin
Result := true;
exit;
end;
inc( Addr1, 4 );
inc( Addr2, 4 );
end;
inc( Addr1, Mod1 );
inc( Addr2, Mod2 );
end;
end;
end;
procedure SDL_AddPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; Color :
cardinal );
var
SrcColor : cardinal;
Addr : PtrUInt;
R, G, B : cardinal;
begin
if Color = 0 then
exit;
with DstSurface^ do
begin
Addr := PtrUInt( Pixels ) + y * Pitch + x * format.BytesPerPixel;
SrcColor := PUInt32( Addr )^;
case format.BitsPerPixel of
8 :
begin
R := SrcColor and $E0 + Color and $E0;
G := SrcColor and $1C + Color and $1C;
B := SrcColor and $03 + Color and $03;
if R > $E0 then
R := $E0;
if G > $1C then
G := $1C;
if B > $03 then
B := $03;
PUInt8( Addr )^ := R or G or B;
end;
15 :
begin
R := SrcColor and $7C00 + Color and $7C00;
G := SrcColor and $03E0 + Color and $03E0;
B := SrcColor and $001F + Color and $001F;
if R > $7C00 then
R := $7C00;
if G > $03E0 then
G := $03E0;
if B > $001F then
B := $001F;
PUInt16( Addr )^ := R or G or B;
end;
16 :
begin
R := SrcColor and $F800 + Color and $F800;
G := SrcColor and $07C0 + Color and $07C0;
B := SrcColor and $001F + Color and $001F;
if R > $F800 then
R := $F800;
if G > $07C0 then
G := $07C0;
if B > $001F then
B := $001F;
PUInt16( Addr )^ := R or G or B;
end;
24 :
begin
R := SrcColor and $00FF0000 + Color and $00FF0000;
G := SrcColor and $0000FF00 + Color and $0000FF00;
B := SrcColor and $000000FF + Color and $000000FF;
if R > $FF0000 then
R := $FF0000;
if G > $00FF00 then
G := $00FF00;
if B > $0000FF then
B := $0000FF;
PUInt32( Addr )^ := SrcColor and $FF000000 or R or G or B;
end;
32 :
begin
R := SrcColor and $00FF0000 + Color and $00FF0000;
G := SrcColor and $0000FF00 + Color and $0000FF00;
B := SrcColor and $000000FF + Color and $000000FF;
if R > $FF0000 then
R := $FF0000;
if G > $00FF00 then
G := $00FF00;
if B > $0000FF then
B := $0000FF;
PUInt32( Addr )^ := R or G or B;
end;
end;
end;
end;
procedure SDL_SubPixel( DstSurface : PSDL_Surface; x : cardinal; y : cardinal; Color :
cardinal );
var
SrcColor : cardinal;
Addr : PtrUInt;
R, G, B : cardinal;
begin
if Color = 0 then
exit;
with DstSurface^ do
begin
Addr := PtrUInt( Pixels ) + y * Pitch + x * format.BytesPerPixel;
SrcColor := PUInt32( Addr )^;
case format.BitsPerPixel of
8 :
begin
R := SrcColor and $E0 - Color and $E0;
G := SrcColor and $1C - Color and $1C;
B := SrcColor and $03 - Color and $03;
if R > $E0 then
R := 0;
if G > $1C then
G := 0;
if B > $03 then
B := 0;
PUInt8( Addr )^ := R or G or B;
end;
15 :
begin
R := SrcColor and $7C00 - Color and $7C00;
G := SrcColor and $03E0 - Color and $03E0;
B := SrcColor and $001F - Color and $001F;
if R > $7C00 then
R := 0;
if G > $03E0 then
G := 0;
if B > $001F then
B := 0;
PUInt16( Addr )^ := R or G or B;
end;
16 :
begin
R := SrcColor and $F800 - Color and $F800;
G := SrcColor and $07C0 - Color and $07C0;
B := SrcColor and $001F - Color and $001F;
if R > $F800 then
R := 0;
if G > $07C0 then
G := 0;
if B > $001F then
B := 0;
PUInt16( Addr )^ := R or G or B;
end;
24 :
begin
R := SrcColor and $00FF0000 - Color and $00FF0000;
G := SrcColor and $0000FF00 - Color and $0000FF00;
B := SrcColor and $000000FF - Color and $000000FF;
if R > $FF0000 then
R := 0;
if G > $00FF00 then
G := 0;
if B > $0000FF then
B := 0;
PUInt32( Addr )^ := SrcColor and $FF000000 or R or G or B;
end;
32 :
begin
R := SrcColor and $00FF0000 - Color and $00FF0000;
G := SrcColor and $0000FF00 - Color and $0000FF00;
B := SrcColor and $000000FF - Color and $000000FF;
if R > $FF0000 then
R := 0;
if G > $00FF00 then
G := 0;
if B > $0000FF then
B := 0;
PUInt32( Addr )^ := R or G or B;
end;
end;
end;
end;
// This procedure works on 8, 15, 16, 24 and 32 bits color depth surfaces.
// In 8 bit color depth mode the procedure works with the default packed
// palette (RRRGGGBB). It handles all clipping.
procedure SDL_AddSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
var
R, G, B, Pixel1, Pixel2, TransparentColor : cardinal;
Src, Dest : TSDL_Rect;
Diff : integer;
SrcAddr, DestAddr : PtrUInt;
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 := PtrUInt( 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 := PtrUInt( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) *
Format.BytesPerPixel;
DestMod := Pitch - Dest.w * Format.BytesPerPixel;
Bits := Format.BitsPerPixel;
end;
SDL_LockSurface( SrcSurface );
SDL_LockSurface( DestSurface );
WorkY := Src.h;
case bits of
8 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt8( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt8( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel1 and $E0 + Pixel2 and $E0;
G := Pixel1 and $1C + Pixel2 and $1C;
B := Pixel1 and $03 + Pixel2 and $03;
if R > $E0 then
R := $E0;
if G > $1C then
G := $1C;
if B > $03 then
B := $03;
PUInt8( DestAddr )^ := R or G or B;
end
else
PUInt8( DestAddr )^ := Pixel1;
end;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
15 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel1 and $7C00 + Pixel2 and $7C00;
G := Pixel1 and $03E0 + Pixel2 and $03E0;
B := Pixel1 and $001F + Pixel2 and $001F;
if R > $7C00 then
R := $7C00;
if G > $03E0 then
G := $03E0;
if B > $001F then
B := $001F;
PUInt16( DestAddr )^ := R or G or B;
end
else
PUInt16( DestAddr )^ := Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
16 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel1 and $F800 + Pixel2 and $F800;
G := Pixel1 and $07E0 + Pixel2 and $07E0;
B := Pixel1 and $001F + Pixel2 and $001F;
if R > $F800 then
R := $F800;
if G > $07E0 then
G := $07E0;
if B > $001F then
B := $001F;
PUInt16( DestAddr )^ := R or G or B;
end
else
PUInt16( DestAddr )^ := Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
24 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^ and $00FFFFFF;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^ and $00FFFFFF;
if Pixel2 > 0 then
begin
R := Pixel1 and $FF0000 + Pixel2 and $FF0000;
G := Pixel1 and $00FF00 + Pixel2 and $00FF00;
B := Pixel1 and $0000FF + Pixel2 and $0000FF;
if R > $FF0000 then
R := $FF0000;
if G > $00FF00 then
G := $00FF00;
if B > $0000FF then
B := $0000FF;
PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or ( R or G or B );
end
else
PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel1;
end;
inc( SrcAddr, 3 );
inc( DestAddr, 3 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
32 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel1 and $FF0000 + Pixel2 and $FF0000;
G := Pixel1 and $00FF00 + Pixel2 and $00FF00;
B := Pixel1 and $0000FF + Pixel2 and $0000FF;
if R > $FF0000 then
R := $FF0000;
if G > $00FF00 then
G := $00FF00;
if B > $0000FF then
B := $0000FF;
PUInt32( DestAddr )^ := R or G or B;
end
else
PUInt32( DestAddr )^ := Pixel1;
end;
inc( SrcAddr, 4 );
inc( DestAddr, 4 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
end;
SDL_UnlockSurface( SrcSurface );
SDL_UnlockSurface( DestSurface );
end;
procedure SDL_SubSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
var
R, G, B, Pixel1, Pixel2, TransparentColor : cardinal;
Src, Dest : TSDL_Rect;
Diff : integer;
SrcAddr, DestAddr : PtrUInt;
//{*_ebx, *}{*_esi, *}{*_edi, _esp*} : cardinal; // Auto Removed, Unused Variable (_ebx) // Auto Removed, Unused Variable (_esi) // Auto Removed, Unused Variable (_edi)
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 := PtrUInt( 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 := PtrUInt( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) *
Format.BytesPerPixel;
DestMod := Pitch - Dest.w * Format.BytesPerPixel;
Bits := DestSurface.Format.BitsPerPixel;
end;
SDL_LockSurface( SrcSurface );
SDL_LockSurface( DestSurface );
WorkY := Src.h;
case bits of
8 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt8( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt8( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel2 and $E0 - Pixel1 and $E0;
G := Pixel2 and $1C - Pixel1 and $1C;
B := Pixel2 and $03 - Pixel1 and $03;
if R > $E0 then
R := 0;
if G > $1C then
G := 0;
if B > $03 then
B := 0;
PUInt8( DestAddr )^ := R or G or B;
end;
end;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
15 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel2 and $7C00 - Pixel1 and $7C00;
G := Pixel2 and $03E0 - Pixel1 and $03E0;
B := Pixel2 and $001F - Pixel1 and $001F;
if R > $7C00 then
R := 0;
if G > $03E0 then
G := 0;
if B > $001F then
B := 0;
PUInt16( DestAddr )^ := R or G or B;
end;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
16 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel2 and $F800 - Pixel1 and $F800;
G := Pixel2 and $07E0 - Pixel1 and $07E0;
B := Pixel2 and $001F - Pixel1 and $001F;
if R > $F800 then
R := 0;
if G > $07E0 then
G := 0;
if B > $001F then
B := 0;
PUInt16( DestAddr )^ := R or G or B;
end;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
24 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^ and $00FFFFFF;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^ and $00FFFFFF;
if Pixel2 > 0 then
begin
R := Pixel2 and $FF0000 - Pixel1 and $FF0000;
G := Pixel2 and $00FF00 - Pixel1 and $00FF00;
B := Pixel2 and $0000FF - Pixel1 and $0000FF;
if R > $FF0000 then
R := 0;
if G > $00FF00 then
G := 0;
if B > $0000FF then
B := 0;
PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or ( R or G or B );
end;
end;
inc( SrcAddr, 3 );
inc( DestAddr, 3 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
32 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^;
if Pixel2 > 0 then
begin
R := Pixel2 and $FF0000 - Pixel1 and $FF0000;
G := Pixel2 and $00FF00 - Pixel1 and $00FF00;
B := Pixel2 and $0000FF - Pixel1 and $0000FF;
if R > $FF0000 then
R := 0;
if G > $00FF00 then
G := 0;
if B > $0000FF then
B := 0;
PUInt32( DestAddr )^ := R or G or B;
end
else
PUInt32( DestAddr )^ := Pixel2;
end;
inc( SrcAddr, 4 );
inc( DestAddr, 4 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
end;
SDL_UnlockSurface( SrcSurface );
SDL_UnlockSurface( DestSurface );
end;
procedure SDL_MonoSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect; Color : cardinal );
var
Src, Dest : TSDL_Rect;
Diff : integer;
SrcAddr, DestAddr : PtrUInt;
//{*_ebx, *}{*_esi, *}{*_edi, _esp*} : cardinal; // Auto Removed, Unused Variable (_ebx) // Auto Removed, Unused Variable (_esi) // Auto Removed, Unused Variable (_edi)
WorkX, WorkY : word;
SrcMod, DestMod : cardinal;
TransparentColor, SrcColor : cardinal;
BPP : cardinal;
begin
if ( SrcSurface = nil ) or ( DestSurface = nil ) then
exit; // Remove this to make it faster
if ( SrcSurface.Format.BitsPerPixel <> DestSurface.Format.BitsPerPixel ) then
exit; // Remove this to make it faster
if SrcRect = nil then
begin
with Src do
begin
x := 0;
y := 0;
w := SrcSurface.w;
h := SrcSurface.h;
end;
end
else
Src := SrcRect^;
if DestRect = nil then
begin
Dest.x := 0;
Dest.y := 0;
end
else
Dest := DestRect^;
Dest.w := Src.w;
Dest.h := Src.h;
with DestSurface.Clip_Rect do
begin
// Source's right side is greater than the dest.cliprect
if Dest.x + Src.w > x + w then
begin
smallint( Src.w ) := x + w - Dest.x;
smallint( Dest.w ) := x + w - Dest.x;
if smallint( Dest.w ) < 1 then
exit;
end;
// Source's bottom side is greater than the dest.clip
if Dest.y + Src.h > y + h then
begin
smallint( Src.h ) := y + h - Dest.y;
smallint( Dest.h ) := y + h - Dest.y;
if smallint( Dest.h ) < 1 then
exit;
end;
// Source's left side is less than the dest.clip
if Dest.x < x then
begin
Diff := x - Dest.x;
Src.x := Src.x + Diff;
smallint( Src.w ) := smallint( Src.w ) - Diff;
Dest.x := x;
smallint( Dest.w ) := smallint( Dest.w ) - Diff;
if smallint( Dest.w ) < 1 then
exit;
end;
// Source's Top side is less than the dest.clip
if Dest.y < y then
begin
Diff := y - Dest.y;
Src.y := Src.y + Diff;
smallint( Src.h ) := smallint( Src.h ) - Diff;
Dest.y := y;
smallint( Dest.h ) := smallint( Dest.h ) - Diff;
if smallint( Dest.h ) < 1 then
exit;
end;
end;
with SrcSurface^ do
begin
SrcAddr := PtrUInt( 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 := PtrUInt( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) *
Format.BytesPerPixel;
DestMod := Pitch - Dest.w * Format.BytesPerPixel;
BPP := DestSurface.Format.BytesPerPixel;
end;
SDL_LockSurface( SrcSurface );
SDL_LockSurface( DestSurface );
WorkY := Src.h;
case BPP of
1 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt8( SrcAddr )^;
if SrcColor <> TransparentColor then
PUInt8( DestAddr )^ := SrcColor;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
2 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt16( SrcAddr )^;
if SrcColor <> TransparentColor then
PUInt16( DestAddr )^ := SrcColor;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
3 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt32( SrcAddr )^ and $FFFFFF;
if SrcColor <> TransparentColor then
PUInt32( DestAddr )^ := ( PUInt32( DestAddr )^ and $FFFFFF ) or SrcColor;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
4 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt32( SrcAddr )^;
if SrcColor <> TransparentColor then
PUInt32( DestAddr )^ := SrcColor;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
end;
SDL_UnlockSurface( SrcSurface );
SDL_UnlockSurface( DestSurface );
end;
// TextureRect.w and TextureRect.h are not used.
// The TextureSurface's size MUST larger than the drawing rectangle!!!
procedure SDL_TexturedSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect; Texture : PSDL_Surface;
TextureRect : PSDL_Rect );
var
Src, Dest : TSDL_Rect;
Diff : integer;
SrcAddr, DestAddr, TextAddr : PtrUInt;
//{*_ebx, *}{*_esi, *}{*_edi, _esp*}: cardinal; // Auto Removed, Unused Variable (_ebx) // Auto Removed, Unused Variable (_esi) // Auto Removed, Unused Variable (_edi)
WorkX, WorkY : word;
SrcMod, DestMod, TextMod : cardinal;
SrcColor, TransparentColor{*, TextureColor*} : cardinal; // Auto Removed, Unused Variable (TextureColor)
BPP : cardinal;
begin
if ( SrcSurface = nil ) or ( DestSurface = nil ) then
exit; // Remove this to make it faster
if ( SrcSurface.Format.BitsPerPixel <> DestSurface.Format.BitsPerPixel ) then
exit; // Remove this to make it faster
if SrcRect = nil then
begin
with Src do
begin
x := 0;
y := 0;
w := SrcSurface.w;
h := SrcSurface.h;
end;
end
else
Src := SrcRect^;
if DestRect = nil then
begin
Dest.x := 0;
Dest.y := 0;
end
else
Dest := DestRect^;
Dest.w := Src.w;
Dest.h := Src.h;
with DestSurface.Clip_Rect do
begin
// Source's right side is greater than the dest.cliprect
if Dest.x + Src.w > x + w then
begin
smallint( Src.w ) := x + w - Dest.x;
smallint( Dest.w ) := x + w - Dest.x;
if smallint( Dest.w ) < 1 then
exit;
end;
// Source's bottom side is greater than the dest.clip
if Dest.y + Src.h > y + h then
begin
smallint( Src.h ) := y + h - Dest.y;
smallint( Dest.h ) := y + h - Dest.y;
if smallint( Dest.h ) < 1 then
exit;
end;
// Source's left side is less than the dest.clip
if Dest.x < x then
begin
Diff := x - Dest.x;
Src.x := Src.x + Diff;
smallint( Src.w ) := smallint( Src.w ) - Diff;
Dest.x := x;
smallint( Dest.w ) := smallint( Dest.w ) - Diff;
if smallint( Dest.w ) < 1 then
exit;
end;
// Source's Top side is less than the dest.clip
if Dest.y < y then
begin
Diff := y - Dest.y;
Src.y := Src.y + Diff;
smallint( Src.h ) := smallint( Src.h ) - Diff;
Dest.y := y;
smallint( Dest.h ) := smallint( Dest.h ) - Diff;
if smallint( Dest.h ) < 1 then
exit;
end;
end;
with SrcSurface^ do
begin
SrcAddr := PtrUInt( 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 := PtrUInt( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) *
Format.BytesPerPixel;
DestMod := Pitch - Dest.w * Format.BytesPerPixel;
BPP := DestSurface.Format.BitsPerPixel;
end;
with Texture^ do
begin
TextAddr := PtrUInt( Pixels ) + UInt32( TextureRect.y ) * Pitch +
UInt32( TextureRect.x ) * Format.BytesPerPixel;
TextMod := Pitch - Src.w * Format.BytesPerPixel;
end;
SDL_LockSurface( SrcSurface );
SDL_LockSurface( DestSurface );
SDL_LockSurface( Texture );
WorkY := Src.h;
case BPP of
1 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt8( SrcAddr )^;
if SrcColor <> TransparentColor then
PUInt8( DestAddr )^ := PUint8( TextAddr )^;
inc( SrcAddr );
inc( DestAddr );
inc( TextAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
inc( TextAddr, TextMod );
dec( WorkY );
until WorkY = 0;
end;
2 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt16( SrcAddr )^;
if SrcColor <> TransparentColor then
PUInt16( DestAddr )^ := PUInt16( TextAddr )^;
inc( SrcAddr );
inc( DestAddr );
inc( TextAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
inc( TextAddr, TextMod );
dec( WorkY );
until WorkY = 0;
end;
3 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt32( SrcAddr )^ and $FFFFFF;
if SrcColor <> TransparentColor then
PUInt32( DestAddr )^ := ( PUInt32( DestAddr )^ and $FFFFFF ) or ( PUInt32( TextAddr )^ and $FFFFFF );
inc( SrcAddr );
inc( DestAddr );
inc( TextAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
inc( TextAddr, TextMod );
dec( WorkY );
until WorkY = 0;
end;
4 :
begin
repeat
WorkX := Src.w;
repeat
SrcColor := PUInt32( SrcAddr )^;
if SrcColor <> TransparentColor then
PUInt32( DestAddr )^ := PUInt32( TextAddr )^;
inc( SrcAddr );
inc( DestAddr );
inc( TextAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
inc( TextAddr, TextMod );
dec( WorkY );
until WorkY = 0;
end;
end;
SDL_UnlockSurface( SrcSurface );
SDL_UnlockSurface( DestSurface );
SDL_UnlockSurface( Texture );
end;
procedure SDL_ZoomSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; DstRect : PSDL_Rect );
var
xc, yc : cardinal;
rx, wx, ry, wy, ry16 : cardinal;
color : cardinal;
modx, mody : cardinal;
begin
// Warning! No checks for surface pointers!!!
if srcrect = nil then
srcrect := @SrcSurface.clip_rect;
if dstrect = nil then
dstrect := @DstSurface.clip_rect;
if SDL_MustLock( SrcSurface ) then
SDL_LockSurface( SrcSurface );
if SDL_MustLock( DstSurface ) then
SDL_LockSurface( DstSurface );
modx := trunc( ( srcrect.w / dstrect.w ) * 65536 );
mody := trunc( ( srcrect.h / dstrect.h ) * 65536 );
//rx := srcrect.x * 65536;
ry := srcrect.y * 65536;
wy := dstrect.y;
for yc := 0 to dstrect.h - 1 do
begin
rx := srcrect.x * 65536;
wx := dstrect.x;
ry16 := ry shr 16;
for xc := 0 to dstrect.w - 1 do
begin
color := SDL_GetPixel( SrcSurface, rx shr 16, ry16 );
SDL_PutPixel( DstSurface, wx, wy, color );
rx := rx + modx;
inc( wx );
end;
ry := ry + mody;
inc( wy );
end;
if SDL_MustLock( SrcSurface ) then
SDL_UnlockSurface( SrcSurface );
if SDL_MustLock( DstSurface ) then
SDL_UnlockSurface( DstSurface );
end;
// Re-map a rectangular area into an area defined by four vertices
// Converted from C to Pascal by KiCHY
procedure SDL_WarpSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect; DstSurface : PSDL_Surface; UL, UR, LR, LL : PPoint );
const
SHIFTS = 15; // Extend ints to limit round-off error (try 2 - 20)
THRESH = 1 shl SHIFTS; // Threshold for pixel size value
procedure CopySourceToDest( UL, UR, LR, LL : TPoint; x1, y1, x2, y2 : cardinal );
var
tm, lm, rm, bm, m : TPoint;
mx, my : cardinal;
cr : cardinal;
begin
// Does the destination area specify a single pixel?
if ( ( abs( ul.x - ur.x ) < THRESH ) and
( abs( ul.x - lr.x ) < THRESH ) and
( abs( ul.x - ll.x ) < THRESH ) and
( abs( ul.y - ur.y ) < THRESH ) and
( abs( ul.y - lr.y ) < THRESH ) and
( abs( ul.y - ll.y ) < THRESH ) ) then
begin // Yes
cr := SDL_GetPixel( SrcSurface, ( x1 shr SHIFTS ), ( y1 shr SHIFTS ) );
SDL_PutPixel( DstSurface, ( ul.x shr SHIFTS ), ( ul.y shr SHIFTS ), cr );
end
else
begin // No
// Quarter the source and the destination, and then recurse
tm.x := ( ul.x + ur.x ) shr 1;
tm.y := ( ul.y + ur.y ) shr 1;
bm.x := ( ll.x + lr.x ) shr 1;
bm.y := ( ll.y + lr.y ) shr 1;
lm.x := ( ul.x + ll.x ) shr 1;
lm.y := ( ul.y + ll.y ) shr 1;
rm.x := ( ur.x + lr.x ) shr 1;
rm.y := ( ur.y + lr.y ) shr 1;
m.x := ( tm.x + bm.x ) shr 1;
m.y := ( tm.y + bm.y ) shr 1;
mx := ( x1 + x2 ) shr 1;
my := ( y1 + y2 ) shr 1;
CopySourceToDest( ul, tm, m, lm, x1, y1, mx, my );
CopySourceToDest( tm, ur, rm, m, mx, y1, x2, my );
CopySourceToDest( m, rm, lr, bm, mx, my, x2, y2 );
CopySourceToDest( lm, m, bm, ll, x1, my, mx, y2 );
end;
end;
var
_UL, _UR, _LR, _LL : TPoint;
Rect_x, Rect_y, Rect_w, Rect_h : integer;
begin
if SDL_MustLock( SrcSurface ) then
SDL_LockSurface( SrcSurface );
if SDL_MustLock( DstSurface ) then
SDL_LockSurface( DstSurface );
if SrcRect = nil then
begin
Rect_x := 0;
Rect_y := 0;
Rect_w := ( SrcSurface.w - 1 ) shl SHIFTS;
Rect_h := ( SrcSurface.h - 1 ) shl SHIFTS;
end
else
begin
Rect_x := SrcRect.x;
Rect_y := SrcRect.y;
Rect_w := ( SrcRect.w - 1 ) shl SHIFTS;
Rect_h := ( SrcRect.h - 1 ) shl SHIFTS;
end;
// Shift all values to help reduce round-off error.
_ul.x := ul.x shl SHIFTS;
_ul.y := ul.y shl SHIFTS;
_ur.x := ur.x shl SHIFTS;
_ur.y := ur.y shl SHIFTS;
_lr.x := lr.x shl SHIFTS;
_lr.y := lr.y shl SHIFTS;
_ll.x := ll.x shl SHIFTS;
_ll.y := ll.y shl SHIFTS;
CopySourceToDest( _ul, _ur, _lr, _ll, Rect_x, Rect_y, Rect_w, Rect_h );
if SDL_MustLock( SrcSurface ) then
SDL_UnlockSurface( SrcSurface );
if SDL_MustLock( DstSurface ) then
SDL_UnlockSurface( DstSurface );
end;
// Draw a line between x1,y1 and x2,y2 to the given surface
// NOTE: The surface must be locked before calling this!
procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal );
var
dx, dy, sdx, sdy, x, y, px, py : integer;
begin
dx := x2 - x1;
dy := y2 - y1;
if dx < 0 then
sdx := -1
else
sdx := 1;
if dy < 0 then
sdy := -1
else
sdy := 1;
dx := sdx * dx + 1;
dy := sdy * dy + 1;
x := 0;
y := 0;
px := x1;
py := y1;
if dx >= dy then
begin
for x := 0 to dx - 1 do
begin
SDL_PutPixel( DstSurface, px, py, Color );
y := y + dy;
if y >= dx then
begin
y := y - dx;
py := py + sdy;
end;
px := px + sdx;
end;
end
else
begin
for y := 0 to dy - 1 do
begin
SDL_PutPixel( DstSurface, px, py, Color );
x := x + dx;
if x >= dy then
begin
x := x - dy;
px := px + sdx;
end;
py := py + sdy;
end;
end;
end;
// Draw a dashed line between x1,y1 and x2,y2 to the given surface
// NOTE: The surface must be locked before calling this!
procedure SDL_DrawLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal; DashLength, DashSpace : byte ); overload;
var
dx, dy, sdx, sdy, x, y, px, py, counter : integer; drawdash : boolean;
begin
counter := 0;
drawdash := true; //begin line drawing with dash
//Avoid invalid user-passed dash parameters
if ( DashLength < 1 )
then
DashLength := 1;
if ( DashSpace < 1 )
then
DashSpace := 0;
dx := x2 - x1;
dy := y2 - y1;
if dx < 0 then
sdx := -1
else
sdx := 1;
if dy < 0 then
sdy := -1
else
sdy := 1;
dx := sdx * dx + 1;
dy := sdy * dy + 1;
x := 0;
y := 0;
px := x1;
py := y1;
if dx >= dy then
begin
for x := 0 to dx - 1 do
begin
//Alternate drawing dashes, or leaving spaces
if drawdash then
begin
SDL_PutPixel( DstSurface, px, py, Color );
inc( counter );
if ( counter > DashLength - 1 ) and ( DashSpace > 0 ) then
begin
drawdash := false;
counter := 0;
end;
end
else //space
begin
inc( counter );
if counter > DashSpace - 1 then
begin
drawdash := true;
counter := 0;
end;
end;
y := y + dy;
if y >= dx then
begin
y := y - dx;
py := py + sdy;
end;
px := px + sdx;
end;
end
else
begin
for y := 0 to dy - 1 do
begin
//Alternate drawing dashes, or leaving spaces
if drawdash then
begin
SDL_PutPixel( DstSurface, px, py, Color );
inc( counter );
if ( counter > DashLength - 1 ) and ( DashSpace > 0 ) then
begin
drawdash := false;
counter := 0;
end;
end
else //space
begin
inc( counter );
if counter > DashSpace - 1 then
begin
drawdash := true;
counter := 0;
end;
end;
x := x + dx;
if x >= dy then
begin
x := x - dy;
px := px + sdx;
end;
py := py + sdy;
end;
end;
end;
procedure SDL_AddLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal );
var
dx, dy, sdx, sdy, x, y, px, py : integer;
begin
dx := x2 - x1;
dy := y2 - y1;
if dx < 0 then
sdx := -1
else
sdx := 1;
if dy < 0 then
sdy := -1
else
sdy := 1;
dx := sdx * dx + 1;
dy := sdy * dy + 1;
x := 0;
y := 0;
px := x1;
py := y1;
if dx >= dy then
begin
for x := 0 to dx - 1 do
begin
SDL_AddPixel( DstSurface, px, py, Color );
y := y + dy;
if y >= dx then
begin
y := y - dx;
py := py + sdy;
end;
px := px + sdx;
end;
end
else
begin
for y := 0 to dy - 1 do
begin
SDL_AddPixel( DstSurface, px, py, Color );
x := x + dx;
if x >= dy then
begin
x := x - dy;
px := px + sdx;
end;
py := py + sdy;
end;
end;
end;
procedure SDL_SubLine( DstSurface : PSDL_Surface; x1, y1, x2, y2 : integer; Color :
cardinal );
var
dx, dy, sdx, sdy, x, y, px, py : integer;
begin
dx := x2 - x1;
dy := y2 - y1;
if dx < 0 then
sdx := -1
else
sdx := 1;
if dy < 0 then
sdy := -1
else
sdy := 1;
dx := sdx * dx + 1;
dy := sdy * dy + 1;
x := 0;
y := 0;
px := x1;
py := y1;
if dx >= dy then
begin
for x := 0 to dx - 1 do
begin
SDL_SubPixel( DstSurface, px, py, Color );
y := y + dy;
if y >= dx then
begin
y := y - dx;
py := py + sdy;
end;
px := px + sdx;
end;
end
else
begin
for y := 0 to dy - 1 do
begin
SDL_SubPixel( DstSurface, px, py, Color );
x := x + dx;
if x >= dy then
begin
x := x - dy;
px := px + sdx;
end;
py := py + sdy;
end;
end;
end;
// flips a rectangle vertically on given surface
procedure SDL_FlipRectV( DstSurface : PSDL_Surface; Rect : PSDL_Rect );
var
TmpRect : TSDL_Rect;
Locked : boolean;
y, FlipLength, RowLength : integer;
Row1, Row2 : Pointer;
OneRow : TByteArray; // Optimize it if you wish
begin
if DstSurface <> nil then
begin
if Rect = nil then
begin // if Rect=nil then we flip the whole surface
TmpRect := SDLRect( 0, 0, DstSurface.w, DstSurface.h );
Rect := @TmpRect;
end;
FlipLength := Rect^.h shr 1 - 1;
RowLength := Rect^.w * DstSurface^.format.BytesPerPixel;
if SDL_MustLock( DstSurface ) then
begin
Locked := true;
SDL_LockSurface( DstSurface );
end
else
Locked := false;
Row1 := pointer( PtrUInt( DstSurface^.Pixels ) + UInt32( Rect^.y ) *
DstSurface^.Pitch );
Row2 := pointer( PtrUInt( 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( PtrUInt( Row1 ), DstSurface^.Pitch );
dec( PtrUInt( 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( PtrUInt( 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( PtrUInt( Row8Bit ), DstSurface^.pitch );
end;
end;
2 :
begin
Row16Bit := pointer( PtrUInt( 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( PtrUInt( Row16Bit ), DstSurface^.pitch );
end;
end;
3 :
begin
Row24Bit := pointer( PtrUInt( 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( PtrUInt( Row24Bit ), DstSurface^.pitch );
end;
end;
4 :
begin
Row32Bit := pointer( PtrUInt( 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( PtrUInt( 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( PtrUInt( Surface^.pixels ) + yr * src_pitch + y1 * depth );
dst_pixels := PUint8( PtrUInt( dst_surface^.pixels ) + yw * dst_pitch + x1 *
depth );
for d := 0 to dx - 1 do
begin
move( src_pixels^, dst_pixels^, depth );
while ( e >= 0 ) do
begin
inc( src_pixels, depth );
e := e - dx2;
end;
inc( dst_pixels, depth );
e := e + dy;
end;
end;
function sign( x : integer ) : integer;
begin
if x > 0 then
result := 1
else
result := -1;
end;
// Stretches a part of a surface
function SDL_ScaleSurfaceRect( SrcSurface : PSDL_Surface; SrcX1, SrcY1, SrcW, SrcH,
Width, Height : integer ) : PSDL_Surface;
var
dst_surface : PSDL_Surface;
dx, dy, e, d, dx2, srcx2, srcy2 : integer;
destx1, desty1 : integer;
begin
srcx2 := srcx1 + SrcW;
srcy2 := srcy1 + SrcH;
result := nil;
destx1 := 0;
desty1 := 0;
dx := abs( integer( Height - desty1 ) );
dy := abs( integer( SrcY2 - SrcY1 ) );
e := ( dy shl 1 ) - dx;
dx2 := dx shl 1;
dy := dy shl 1;
dst_surface := SDL_CreateRGBSurface( SDL_HWPALETTE, width - destx1, Height -
desty1,
SrcSurface^.Format^.BitsPerPixel,
SrcSurface^.Format^.RMask,
SrcSurface^.Format^.GMask,
SrcSurface^.Format^.BMask,
SrcSurface^.Format^.AMask );
if ( dst_surface^.format^.BytesPerPixel = 1 ) then
SDL_SetColors( dst_surface, @SrcSurface^.format^.palette^.colors^[ 0 ], 0, 256 );
SDL_SetColorKey( dst_surface, sdl_srccolorkey, SrcSurface^.format^.colorkey );
if ( SDL_MustLock( dst_surface ) ) then
if ( SDL_LockSurface( dst_surface ) < 0 ) then
exit;
for d := 0 to dx - 1 do
begin
SDL_Stretch8( SrcSurface, dst_surface, destx1, Width, SrcX1, SrcX2, SrcY1, desty1,
SrcSurface^.format^.BytesPerPixel );
while e >= 0 do
begin
inc( SrcY1 );
e := e - dx2;
end;
inc( desty1 );
e := e + dy;
end;
if SDL_MUSTLOCK( dst_surface ) then
SDL_UnlockSurface( dst_surface );
result := dst_surface;
end;
procedure SDL_MoveLine( Surface : PSDL_Surface; x1, x2, y1, xofs, depth : integer );
var
src_pixels, dst_pixels : PUint8;
i : integer;
begin
src_pixels := PUint8( PtrUInt( Surface^.pixels ) + Surface^.w * y1 * depth + x2 *
depth );
dst_pixels := PUint8( PtrUInt( Surface^.pixels ) + Surface^.w * y1 * depth + ( x2
+ xofs ) * depth );
for i := x2 downto x1 do
begin
move( src_pixels^, dst_pixels^, depth );
dec( src_pixels );
dec( dst_pixels );
end;
end;
{ Return the pixel value at (x, y)
NOTE: The surface must be locked before calling this! }
function SDL_GetPixel( SrcSurface : PSDL_Surface; x : integer; y : integer ) : Uint32;
var
bpp : UInt32;
p : PInteger;
begin
bpp := SrcSurface.format.BytesPerPixel;
// Here p is the address to the pixel we want to retrieve
p := Pointer( PtrUInt( SrcSurface.pixels ) + UInt32( y ) * SrcSurface.pitch + UInt32( x ) *
bpp );
case bpp of
1 : result := PUint8( p )^;
2 : result := PUint16( p )^;
3 :
if ( SDL_BYTEORDER = SDL_BIG_ENDIAN ) then
result := PUInt8Array( p )[ 0 ] shl 16 or PUInt8Array( p )[ 1 ] shl 8 or
PUInt8Array( p )[ 2 ]
else
result := PUInt8Array( p )[ 0 ] or PUInt8Array( p )[ 1 ] shl 8 or
PUInt8Array( p )[ 2 ] shl 16;
4 : result := PUint32( p )^;
else
result := 0; // shouldn't happen, but avoids warnings
end;
end;
{ Set the pixel at (x, y) to the given value
NOTE: The surface must be locked before calling this! }
procedure SDL_PutPixel( DstSurface : PSDL_Surface; x : integer; y : integer; pixel :
Uint32 );
var
bpp : UInt32;
p : PInteger;
begin
bpp := DstSurface.format.BytesPerPixel;
p := Pointer( PtrUInt( DstSurface.pixels ) + UInt32( y ) * DstSurface.pitch + UInt32( x )
* bpp );
case bpp of
1 : PUint8( p )^ := pixel;
2 : PUint16( p )^ := pixel;
3 :
if ( SDL_BYTEORDER = SDL_BIG_ENDIAN ) then
begin
PUInt8Array( p )[ 0 ] := ( pixel shr 16 ) and $FF;
PUInt8Array( p )[ 1 ] := ( pixel shr 8 ) and $FF;
PUInt8Array( p )[ 2 ] := pixel and $FF;
end
else
begin
PUInt8Array( p )[ 0 ] := pixel and $FF;
PUInt8Array( p )[ 1 ] := ( pixel shr 8 ) and $FF;
PUInt8Array( p )[ 2 ] := ( pixel shr 16 ) and $FF;
end;
4 :
PUint32( p )^ := pixel;
end;
end;
procedure SDL_ScrollY( DstSurface : PSDL_Surface; DifY : integer );
var
r1, r2 : TSDL_Rect;
//buffer: PSDL_Surface;
YPos : Integer;
begin
if ( DstSurface <> nil ) and ( DifY <> 0 ) then
begin
//if DifY > 0 then // going up
//begin
ypos := 0;
r1.x := 0;
r2.x := 0;
r1.w := DstSurface.w;
r2.w := DstSurface.w;
r1.h := DifY;
r2.h := DifY;
while ypos < DstSurface.h do
begin
r1.y := ypos;
r2.y := ypos + DifY;
SDL_BlitSurface( DstSurface, @r2, DstSurface, @r1 );
ypos := ypos + DifY;
end;
//end
//else
//begin // Going Down
//end;
end;
end;
{procedure SDL_ScrollY(Surface: PSDL_Surface; DifY: integer);
var
r1, r2: TSDL_Rect;
buffer: PSDL_Surface;
begin
if (Surface <> nil) and (Dify <> 0) then
begin
buffer := SDL_CreateRGBSurface(SDL_HWSURFACE, (Surface^.w - DifY) * 2,
Surface^.h * 2,
Surface^.Format^.BitsPerPixel, 0, 0, 0, 0);
if buffer <> nil then
begin
if (buffer^.format^.BytesPerPixel = 1) then
SDL_SetColors(buffer, @Surface^.format^.palette^.colors^[0], 0, 256);
r1 := SDLRect(0, DifY, buffer^.w, buffer^.h);
r2 := SDLRect(0, 0, buffer^.w, buffer^.h);
SDL_BlitSurface(Surface, @r1, buffer, @r2);
SDL_BlitSurface(buffer, @r2, Surface, @r2);
SDL_FreeSurface(buffer);
end;
end;
end;}
procedure SDL_ScrollX( DstSurface : PSDL_Surface; DifX : integer );
var
r1, r2 : TSDL_Rect;
buffer : PSDL_Surface;
begin
if ( DstSurface <> nil ) and ( DifX <> 0 ) then
begin
buffer := SDL_CreateRGBSurface( SDL_HWSURFACE, ( DstSurface^.w - DifX ) * 2,
DstSurface^.h * 2,
DstSurface^.Format^.BitsPerPixel,
DstSurface^.Format^.RMask,
DstSurface^.Format^.GMask,
DstSurface^.Format^.BMask,
DstSurface^.Format^.AMask );
if buffer <> nil then
begin
if ( buffer^.format^.BytesPerPixel = 1 ) then
SDL_SetColors( buffer, @DstSurface^.format^.palette^.colors^[ 0 ], 0, 256 );
r1 := SDLRect( DifX, 0, buffer^.w, buffer^.h );
r2 := SDLRect( 0, 0, buffer^.w, buffer^.h );
SDL_BlitSurface( DstSurface, @r1, buffer, @r2 );
SDL_BlitSurface( buffer, @r2, DstSurface, @r2 );
SDL_FreeSurface( buffer );
end;
end;
end;
procedure SDL_RotateRad( DstSurface, SrcSurface : PSDL_Surface; SrcRect :
PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Single );
var
aSin, aCos : Single;
MX, MY, DX, DY, NX, NY, SX, SY, OX, OY, Width, Height, TX, TY, RX, RY, ROX, ROY : Integer;
Colour, TempTransparentColour : UInt32;
MAXX, MAXY : Integer;
begin
// Rotate the surface to the target surface.
TempTransparentColour := SrcSurface.format.colorkey;
{if srcRect.w > srcRect.h then
begin
Width := srcRect.w;
Height := srcRect.w;
end
else
begin
Width := srcRect.h;
Height := srcRect.h;
end; }
maxx := DstSurface.w;
maxy := DstSurface.h;
aCos := cos( Angle );
aSin := sin( Angle );
Width := round( abs( srcrect.h * acos ) + abs( srcrect.w * asin ) );
Height := round( abs( srcrect.h * asin ) + abs( srcrect.w * acos ) );
OX := Width div 2;
OY := Height div 2; ;
MX := ( srcRect.x + ( srcRect.x + srcRect.w ) ) div 2;
MY := ( srcRect.y + ( srcRect.y + srcRect.h ) ) div 2;
ROX := ( -( srcRect.w div 2 ) ) + Offsetx;
ROY := ( -( srcRect.h div 2 ) ) + OffsetY;
Tx := ox + round( ROX * aSin - ROY * aCos );
Ty := oy + round( ROY * aSin + ROX * aCos );
SX := 0;
for DX := DestX - TX to DestX - TX + ( width ) do
begin
Inc( SX );
SY := 0;
for DY := DestY - TY to DestY - TY + ( Height ) do
begin
RX := SX - OX;
RY := SY - OY;
NX := round( mx + RX * aSin + RY * aCos ); //
NY := round( my + RY * aSin - RX * aCos ); //
// Used for testing only
//SDL_PutPixel(DestSurface.SDLSurfacePointer,DX,DY,0);
if ( ( DX > 0 ) and ( DX < MAXX ) ) and ( ( DY > 0 ) and ( DY < MAXY ) ) then
begin
if ( NX >= srcRect.x ) and ( NX <= srcRect.x + srcRect.w ) then
begin
if ( NY >= srcRect.y ) and ( NY <= srcRect.y + srcRect.h ) then
begin
Colour := SDL_GetPixel( SrcSurface, NX, NY );
if Colour <> TempTransparentColour then
begin
SDL_PutPixel( DstSurface, DX, DY, Colour );
end;
end;
end;
end;
inc( SY );
end;
end;
end;
procedure SDL_RotateDeg( DstSurface, SrcSurface : PSDL_Surface; SrcRect :
PSDL_Rect; DestX, DestY, OffsetX, OffsetY : Integer; Angle : Integer );
begin
SDL_RotateRad( DstSurface, SrcSurface, SrcRect, DestX, DestY, OffsetX, OffsetY, DegToRad( Angle ) );
end;
function ValidateSurfaceRect( DstSurface : PSDL_Surface; dstrect : PSDL_Rect ) : TSDL_Rect;
var
RealRect : TSDL_Rect;
OutOfRange : Boolean;
begin
OutOfRange := false;
if dstrect = nil then
begin
RealRect.x := 0;
RealRect.y := 0;
RealRect.w := DstSurface.w;
RealRect.h := DstSurface.h;
end
else
begin
if dstrect.x < DstSurface.w then
begin
RealRect.x := dstrect.x;
end
else if dstrect.x < 0 then
begin
realrect.x := 0;
end
else
begin
OutOfRange := True;
end;
if dstrect.y < DstSurface.h then
begin
RealRect.y := dstrect.y;
end
else if dstrect.y < 0 then
begin
realrect.y := 0;
end
else
begin
OutOfRange := True;
end;
if OutOfRange = False then
begin
if realrect.x + dstrect.w <= DstSurface.w then
begin
RealRect.w := dstrect.w;
end
else
begin
RealRect.w := dstrect.w - realrect.x;
end;
if realrect.y + dstrect.h <= DstSurface.h then
begin
RealRect.h := dstrect.h;
end
else
begin
RealRect.h := dstrect.h - realrect.y;
end;
end;
end;
if OutOfRange = False then
begin
result := realrect;
end
else
begin
realrect.w := 0;
realrect.h := 0;
realrect.x := 0;
realrect.y := 0;
result := realrect;
end;
end;
procedure SDL_FillRectAdd( DstSurface : PSDL_Surface; dstrect : PSDL_Rect; color : UInt32 );
var
RealRect : TSDL_Rect;
Addr : pointer;
ModX, BPP : cardinal;
x, y, R, G, B, SrcColor : cardinal;
begin
RealRect := ValidateSurfaceRect( DstSurface, DstRect );
if ( RealRect.w > 0 ) and ( RealRect.h > 0 ) then
begin
SDL_LockSurface( DstSurface );
BPP := DstSurface.format.BytesPerPixel;
with DstSurface^ do
begin
Addr := pointer( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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( PtrUInt( Addr ), BPP );
end;
inc( PtrUInt( 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 : PtrUInt;
SrcPitch, DestPitch, x, y : UInt32;
begin
if ( Src = nil ) or ( Dest = nil ) then
exit;
if ( Src.w shl 1 ) < Dest.w then
exit;
if ( Src.h shl 1 ) < Dest.h then
exit;
if SDL_MustLock( Src ) then
SDL_LockSurface( Src );
if SDL_MustLock( Dest ) then
SDL_LockSurface( Dest );
ReadRow := PtrUInt( Src.Pixels );
WriteRow := PtrUInt( Dest.Pixels );
SrcPitch := Src.pitch;
DestPitch := Dest.pitch;
case Src.format.BytesPerPixel of
1 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt8( WriteAddr )^ := PUInt8( ReadAddr )^;
PUInt8( WriteAddr + 1 )^ := PUInt8( ReadAddr )^;
PUInt8( WriteAddr + DestPitch )^ := PUInt8( ReadAddr )^;
PUInt8( WriteAddr + DestPitch + 1 )^ := PUInt8( ReadAddr )^;
inc( ReadAddr );
inc( WriteAddr, 2 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
2 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt16( WriteAddr )^ := PUInt16( ReadAddr )^;
PUInt16( WriteAddr + 2 )^ := PUInt16( ReadAddr )^;
PUInt16( WriteAddr + DestPitch )^ := PUInt16( ReadAddr )^;
PUInt16( WriteAddr + DestPitch + 2 )^ := PUInt16( ReadAddr )^;
inc( ReadAddr, 2 );
inc( WriteAddr, 4 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
3 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt32( WriteAddr )^ := ( PUInt32( WriteAddr )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
PUInt32( WriteAddr + 3 )^ := ( PUInt32( WriteAddr + 3 )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
PUInt32( WriteAddr + DestPitch )^ := ( PUInt32( WriteAddr + DestPitch )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
PUInt32( WriteAddr + DestPitch + 3 )^ := ( PUInt32( WriteAddr + DestPitch + 3 )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
inc( ReadAddr, 3 );
inc( WriteAddr, 6 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
4 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt32( WriteAddr )^ := PUInt32( ReadAddr )^;
PUInt32( WriteAddr + 4 )^ := PUInt32( ReadAddr )^;
PUInt32( WriteAddr + DestPitch )^ := PUInt32( ReadAddr )^;
PUInt32( WriteAddr + DestPitch + 4 )^ := PUInt32( ReadAddr )^;
inc( ReadAddr, 4 );
inc( WriteAddr, 8 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
end;
if SDL_MustLock( Src ) then
SDL_UnlockSurface( Src );
if SDL_MustLock( Dest ) then
SDL_UnlockSurface( Dest );
end;
procedure SDL_Scanline2xBlit( Src, Dest : PSDL_Surface );
var
ReadAddr, WriteAddr, ReadRow, WriteRow : PtrUInt;
SrcPitch, DestPitch, x, y : UInt32;
begin
if ( Src = nil ) or ( Dest = nil ) then
exit;
if ( Src.w shl 1 ) < Dest.w then
exit;
if ( Src.h shl 1 ) < Dest.h then
exit;
if SDL_MustLock( Src ) then
SDL_LockSurface( Src );
if SDL_MustLock( Dest ) then
SDL_LockSurface( Dest );
ReadRow := PtrUInt( Src.Pixels );
WriteRow := PtrUInt( Dest.Pixels );
SrcPitch := Src.pitch;
DestPitch := Dest.pitch;
case Src.format.BytesPerPixel of
1 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt8( WriteAddr )^ := PUInt8( ReadAddr )^;
PUInt8( WriteAddr + 1 )^ := PUInt8( ReadAddr )^;
inc( ReadAddr );
inc( WriteAddr, 2 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
2 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt16( WriteAddr )^ := PUInt16( ReadAddr )^;
PUInt16( WriteAddr + 2 )^ := PUInt16( ReadAddr )^;
inc( ReadAddr, 2 );
inc( WriteAddr, 4 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
3 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt32( WriteAddr )^ := ( PUInt32( WriteAddr )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
PUInt32( WriteAddr + 3 )^ := ( PUInt32( WriteAddr + 3 )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
inc( ReadAddr, 3 );
inc( WriteAddr, 6 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
4 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
PUInt32( WriteAddr )^ := PUInt32( ReadAddr )^;
PUInt32( WriteAddr + 4 )^ := PUInt32( ReadAddr )^;
inc( ReadAddr, 4 );
inc( WriteAddr, 8 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
end;
if SDL_MustLock( Src ) then
SDL_UnlockSurface( Src );
if SDL_MustLock( Dest ) then
SDL_UnlockSurface( Dest );
end;
procedure SDL_50Scanline2xBlit( Src, Dest : PSDL_Surface );
var
ReadAddr, WriteAddr, ReadRow, WriteRow : PtrUInt;
SrcPitch, DestPitch, x, y, Color : UInt32;
begin
if ( Src = nil ) or ( Dest = nil ) then
exit;
if ( Src.w shl 1 ) < Dest.w then
exit;
if ( Src.h shl 1 ) < Dest.h then
exit;
if SDL_MustLock( Src ) then
SDL_LockSurface( Src );
if SDL_MustLock( Dest ) then
SDL_LockSurface( Dest );
ReadRow := PtrUInt( Src.Pixels );
WriteRow := PtrUInt( Dest.Pixels );
SrcPitch := Src.pitch;
DestPitch := Dest.pitch;
case Src.format.BitsPerPixel of
8 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
Color := PUInt8( ReadAddr )^;
PUInt8( WriteAddr )^ := Color;
PUInt8( WriteAddr + 1 )^ := Color;
Color := ( Color shr 1 ) and $6D; {%01101101}
PUInt8( WriteAddr + DestPitch )^ := Color;
PUInt8( WriteAddr + DestPitch + 1 )^ := Color;
inc( ReadAddr );
inc( WriteAddr, 2 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
15 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
Color := PUInt16( ReadAddr )^;
PUInt16( WriteAddr )^ := Color;
PUInt16( WriteAddr + 2 )^ := Color;
Color := ( Color shr 1 ) and $3DEF; {%0011110111101111}
PUInt16( WriteAddr + DestPitch )^ := Color;
PUInt16( WriteAddr + DestPitch + 2 )^ := Color;
inc( ReadAddr, 2 );
inc( WriteAddr, 4 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
16 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
Color := PUInt16( ReadAddr )^;
PUInt16( WriteAddr )^ := Color;
PUInt16( WriteAddr + 2 )^ := Color;
Color := ( Color shr 1 ) and $7BEF; {%0111101111101111}
PUInt16( WriteAddr + DestPitch )^ := Color;
PUInt16( WriteAddr + DestPitch + 2 )^ := Color;
inc( ReadAddr, 2 );
inc( WriteAddr, 4 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
24 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
Color := ( PUInt32( WriteAddr )^ and $FF000000 ) or ( PUInt32( ReadAddr )^ and $00FFFFFF );
PUInt32( WriteAddr )^ := Color;
PUInt32( WriteAddr + 3 )^ := Color;
Color := ( Color shr 1 ) and $007F7F7F; {%011111110111111101111111}
PUInt32( WriteAddr + DestPitch )^ := Color;
PUInt32( WriteAddr + DestPitch + 3 )^ := Color;
inc( ReadAddr, 3 );
inc( WriteAddr, 6 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
32 : for y := 1 to Src.h do
begin
ReadAddr := ReadRow;
WriteAddr := WriteRow;
for x := 1 to Src.w do
begin
Color := PUInt32( ReadAddr )^;
PUInt32( WriteAddr )^ := Color;
PUInt32( WriteAddr + 4 )^ := Color;
Color := ( Color shr 1 ) and $7F7F7F7F;
PUInt32( WriteAddr + DestPitch )^ := Color;
PUInt32( WriteAddr + DestPitch + 4 )^ := Color;
inc( ReadAddr, 4 );
inc( WriteAddr, 8 );
end;
inc( PtrUInt( ReadRow ), SrcPitch );
inc( PtrUInt( WriteRow ), DestPitch * 2 );
end;
end;
if SDL_MustLock( Src ) then
SDL_UnlockSurface( Src );
if SDL_MustLock( Dest ) then
SDL_UnlockSurface( Dest );
end;
function SDL_PixelTestSurfaceVsRect( SrcSurface1 : PSDL_Surface; SrcRect1 :
PSDL_Rect; SrcRect2 : PSDL_Rect; Left1, Top1, Left2, Top2 : integer ) :
boolean;
var
Src_Rect1, Src_Rect2 : TSDL_Rect;
right1, bottom1 : integer;
right2, bottom2 : integer;
Scan1Start, {Scan2Start,} ScanWidth, ScanHeight : cardinal;
Mod1 : cardinal;
Addr1 : PtrUInt;
BPP : cardinal;
Pitch1 : cardinal;
TransparentColor1 : cardinal;
tx, ty : cardinal;
// StartTick : cardinal; // Auto Removed, Unused Variable
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 := PtrUInt( Pixels );
inc( Addr1, Pitch1 * UInt32( Src_Rect1.y ) );
with format^ do
begin
BPP := BytesPerPixel;
TransparentColor1 := colorkey;
end;
end;
Mod1 := Pitch1 - ( ScanWidth * BPP );
inc( Addr1, BPP * Scan1Start );
if Top1 <= Top2 then
begin
// 1. up, 2. down
ScanHeight := Bottom1 - Top2;
if ScanHeight > Src_Rect2.h then
ScanHeight := Src_Rect2.h;
inc( Addr1, Pitch1 * UInt32( Top2 - Top1 ) );
end
else
begin
// 1. down, 2. up
ScanHeight := Bottom2 - Top1;
if ScanHeight > Src_Rect1.h then
ScanHeight := Src_Rect1.h;
end;
case BPP of
1 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
if ( PByte( Addr1 )^ <> TransparentColor1 ) then
begin
Result := true;
exit;
end;
inc( Addr1 );
end;
inc( Addr1, Mod1 );
end;
2 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
if ( PWord( Addr1 )^ <> TransparentColor1 ) then
begin
Result := true;
exit;
end;
inc( Addr1, 2 );
end;
inc( Addr1, Mod1 );
end;
3 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
Color1 := PLongWord( Addr1 )^ and $00FFFFFF;
if ( Color1 <> TransparentColor1 )
then
begin
Result := true;
exit;
end;
inc( Addr1, 3 );
end;
inc( Addr1, Mod1 );
end;
4 :
for ty := 1 to ScanHeight do
begin
for tx := 1 to ScanWidth do
begin
if ( PLongWord( Addr1 )^ <> TransparentColor1 ) then
begin
Result := true;
exit;
end;
inc( Addr1, 4 );
end;
inc( Addr1, Mod1 );
end;
end;
end;
procedure SDL_ORSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
var
{*R, *}{*G, *}{*B, *}Pixel1, Pixel2, TransparentColor : cardinal; // Auto Removed, Unused Variable (R) // Auto Removed, Unused Variable (G) // Auto Removed, Unused Variable (B)
Src, Dest : TSDL_Rect;
Diff : integer;
SrcAddr, DestAddr : PtrUInt;
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 := PtrUInt( 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 := PtrUInt( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) *
Format.BytesPerPixel;
DestMod := Pitch - Dest.w * Format.BytesPerPixel;
Bits := Format.BitsPerPixel;
end;
SDL_LockSurface( SrcSurface );
SDL_LockSurface( DestSurface );
WorkY := Src.h;
case bits of
8 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt8( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt8( DestAddr )^;
PUInt8( DestAddr )^ := Pixel2 or Pixel1;
end;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
15 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
PUInt16( DestAddr )^ := Pixel2 or Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
16 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
PUInt16( DestAddr )^ := Pixel2 or Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
24 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^ and $00FFFFFF;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^ and $00FFFFFF;
PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel2 or Pixel1;
end;
inc( SrcAddr, 3 );
inc( DestAddr, 3 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
32 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^;
PUInt32( DestAddr )^ := Pixel2 or Pixel1;
end;
inc( SrcAddr, 4 );
inc( DestAddr, 4 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
end;
SDL_UnlockSurface( SrcSurface );
SDL_UnlockSurface( DestSurface );
end;
procedure SDL_ANDSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
var
{*R, *}{*G, *}{*B, *}Pixel1, Pixel2, TransparentColor : cardinal; // Auto Removed, Unused Variable (R) // Auto Removed, Unused Variable (G) // Auto Removed, Unused Variable (B)
Src, Dest : TSDL_Rect;
Diff : integer;
SrcAddr, DestAddr : PtrUInt;
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 := PtrUInt( 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 := PtrUInt( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) *
Format.BytesPerPixel;
DestMod := Pitch - Dest.w * Format.BytesPerPixel;
Bits := Format.BitsPerPixel;
end;
SDL_LockSurface( SrcSurface );
SDL_LockSurface( DestSurface );
WorkY := Src.h;
case bits of
8 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt8( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt8( DestAddr )^;
PUInt8( DestAddr )^ := Pixel2 and Pixel1;
end;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
15 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
PUInt16( DestAddr )^ := Pixel2 and Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
16 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
PUInt16( DestAddr )^ := Pixel2 and Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
24 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^ and $00FFFFFF;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^ and $00FFFFFF;
PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel2 and Pixel1;
end;
inc( SrcAddr, 3 );
inc( DestAddr, 3 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
32 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^;
PUInt32( DestAddr )^ := Pixel2 and Pixel1;
end;
inc( SrcAddr, 4 );
inc( DestAddr, 4 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
end;
SDL_UnlockSurface( SrcSurface );
SDL_UnlockSurface( DestSurface );
end;
procedure SDL_GTSurface( SrcSurface : PSDL_Surface; SrcRect : PSDL_Rect;
DestSurface : PSDL_Surface; DestRect : PSDL_Rect );
var
R, G, B, Pixel1, Pixel2, TransparentColor : cardinal;
Src, Dest : TSDL_Rect;
Diff : integer;
SrcAddr, DestAddr : PtrUInt;
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 := PtrUInt( 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 := PtrUInt( 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 : PtrUInt;
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 := PtrUInt( 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 := PtrUInt( Pixels ) + UInt32( Dest.y ) * Pitch + UInt32( Dest.x ) *
Format.BytesPerPixel;
DestMod := Pitch - Dest.w * Format.BytesPerPixel;
Bits := Format.BitsPerPixel;
end;
SDL_LockSurface( SrcSurface );
SDL_LockSurface( DestSurface );
WorkY := Src.h;
case bits of
8 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt8( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt8( DestAddr )^;
if Pixel2 > 0 then
begin
if Pixel2 and $E0 < Pixel1 and $E0 then
R := Pixel2 and $E0
else
R := Pixel1 and $E0;
if Pixel2 and $1C < Pixel1 and $1C then
G := Pixel2 and $1C
else
G := Pixel1 and $1C;
if Pixel2 and $03 < Pixel1 and $03 then
B := Pixel2 and $03
else
B := Pixel1 and $03;
if R > $E0 then
R := $E0;
if G > $1C then
G := $1C;
if B > $03 then
B := $03;
PUInt8( DestAddr )^ := R or G or B;
end
else
PUInt8( DestAddr )^ := Pixel1;
end;
inc( SrcAddr );
inc( DestAddr );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
15 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
if Pixel2 > 0 then
begin
if Pixel2 and $7C00 < Pixel1 and $7C00 then
R := Pixel2 and $7C00
else
R := Pixel1 and $7C00;
if Pixel2 and $03E0 < Pixel1 and $03E0 then
G := Pixel2 and $03E0
else
G := Pixel1 and $03E0;
if Pixel2 and $001F < Pixel1 and $001F then
B := Pixel2 and $001F
else
B := Pixel1 and $001F;
PUInt16( DestAddr )^ := R or G or B;
end
else
PUInt16( DestAddr )^ := Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
16 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt16( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt16( DestAddr )^;
if Pixel2 > 0 then
begin
if Pixel2 and $F800 < Pixel1 and $F800 then
R := Pixel2 and $F800
else
R := Pixel1 and $F800;
if Pixel2 and $07E0 < Pixel1 and $07E0 then
G := Pixel2 and $07E0
else
G := Pixel1 and $07E0;
if Pixel2 and $001F < Pixel1 and $001F then
B := Pixel2 and $001F
else
B := Pixel1 and $001F;
PUInt16( DestAddr )^ := R or G or B;
end
else
PUInt16( DestAddr )^ := Pixel1;
end;
inc( SrcAddr, 2 );
inc( DestAddr, 2 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
24 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^ and $00FFFFFF;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^ and $00FFFFFF;
if Pixel2 > 0 then
begin
if Pixel2 and $FF0000 < Pixel1 and $FF0000 then
R := Pixel2 and $FF0000
else
R := Pixel1 and $FF0000;
if Pixel2 and $00FF00 < Pixel1 and $00FF00 then
G := Pixel2 and $00FF00
else
G := Pixel1 and $00FF00;
if Pixel2 and $0000FF < Pixel1 and $0000FF then
B := Pixel2 and $0000FF
else
B := Pixel1 and $0000FF;
PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or ( R or G or B );
end
else
PUInt32( DestAddr )^ := PUInt32( DestAddr )^ and $FF000000 or Pixel1;
end;
inc( SrcAddr, 3 );
inc( DestAddr, 3 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
32 :
begin
repeat
WorkX := Src.w;
repeat
Pixel1 := PUInt32( SrcAddr )^;
if ( Pixel1 <> TransparentColor ) and ( Pixel1 <> 0 ) then
begin
Pixel2 := PUInt32( DestAddr )^;
if Pixel2 > 0 then
begin
if Pixel2 and $FF0000 < Pixel1 and $FF0000 then
R := Pixel2 and $FF0000
else
R := Pixel1 and $FF0000;
if Pixel2 and $00FF00 < Pixel1 and $00FF00 then
G := Pixel2 and $00FF00
else
G := Pixel1 and $00FF00;
if Pixel2 and $0000FF < Pixel1 and $0000FF then
B := Pixel2 and $0000FF
else
B := Pixel1 and $0000FF;
PUInt32( DestAddr )^ := R or G or B;
end
else
PUInt32( DestAddr )^ := Pixel1;
end;
inc( SrcAddr, 4 );
inc( DestAddr, 4 );
dec( WorkX );
until WorkX = 0;
inc( SrcAddr, SrcMod );
inc( DestAddr, DestMod );
dec( WorkY );
until WorkY = 0;
end;
end;
SDL_UnlockSurface( SrcSurface );
SDL_UnlockSurface( DestSurface );
end;
// Will clip the x1,x2,y1,x2 params to the ClipRect provided
function SDL_ClipLine( var x1, y1, x2, y2 : Integer; ClipRect : PSDL_Rect ) : boolean;
var
tflag, flag1, flag2 : word;
txy, xedge, yedge : Integer;
slope : single;
function ClipCode( x, y : Integer ) : word;
begin
Result := 0;
if x < ClipRect.x then
Result := 1;
if x >= ClipRect.w + ClipRect.x then
Result := Result or 2;
if y < ClipRect.y then
Result := Result or 4;
if y >= ClipRect.h + ClipRect.y then
Result := Result or 8;
end;
begin
flag1 := ClipCode( x1, y1 );
flag2 := ClipCode( x2, y2 );
result := true;
while true do
begin
if ( flag1 or flag2 ) = 0 then
Exit; // all in
if ( flag1 and flag2 ) <> 0 then
begin
result := false;
Exit; // all out
end;
if flag2 = 0 then
begin
txy := x1; x1 := x2; x2 := txy;
txy := y1; y1 := y2; y2 := txy;
tflag := flag1; flag1 := flag2; flag2 := tflag;
end;
if ( flag2 and 3 ) <> 0 then
begin
if ( flag2 and 1 ) <> 0 then
xedge := ClipRect.x
else
xedge := ClipRect.w + ClipRect.x - 1; // back 1 pixel otherwise we end up in a loop
slope := ( y2 - y1 ) / ( x2 - x1 );
y2 := y1 + Round( slope * ( xedge - x1 ) );
x2 := xedge;
end
else
begin
if ( flag2 and 4 ) <> 0 then
yedge := ClipRect.y
else
yedge := ClipRect.h + ClipRect.y - 1; // up 1 pixel otherwise we end up in a loop
slope := ( x2 - x1 ) / ( y2 - y1 );
x2 := x1 + Round( slope * ( yedge - y1 ) );
y2 := yedge;
end;
flag2 := ClipCode( x2, y2 );
end;
end;
end.
