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{
/***************************************************************************
RGBWinRoutines.pas
***************************************************************************/
*****************************************************************************
* *
* See the file COPYING.modifiedLGPL, included in this distribution, *
* for details about the copyright. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* *
*****************************************************************************
Author: Tom Gregorovic (_tom_@centrum.cz)
Abstract:
This unit contains routines for win32 interface.
}
unit RGBWinRoutines;
{$ifdef fpc}
{$mode objfpc}{$H+}
{$endif}
interface
uses
SysUtils, Windows, Classes,
RGBTypes;
procedure WidgetSetDrawRGB32Bitmap(Dest: HDC; DstX, DstY: Integer; SrcX, SrcY, SrcWidth, SrcHeight: Integer;
Bitmap: TRGB32BitmapCore);
procedure WidgetSetStretchDrawRGB32Bitmap(Dest: HDC; DstX, DstY, DstWidth, DstHeight: Integer;
SrcX, SrcY, SrcWidth, SrcHeight: Integer; Bitmap: TRGB32BitmapCore);
procedure WidgetSetDrawRGB8Bitmap(Dest: HDC; DstX, DstY: Integer; SrcX, SrcY, SrcWidth, SrcHeight: Integer;
Bitmap: TRGB8BitmapCore);
implementation
procedure WidgetSetDrawRGB32Bitmap(Dest: HDC; DstX, DstY: Integer; SrcX, SrcY, SrcWidth,
SrcHeight: Integer; Bitmap: TRGB32BitmapCore);
var
Info: BITMAPINFO;
begin
with Info.bmiHeader do
begin
biSize := SizeOf(BITMAPINFOHEADER);
biWidth := Bitmap.Width;
biHeight := Bitmap.Height;
biPlanes := 1;
biBitCount := 32;
biCompression := BI_RGB;
biSizeImage := 0;
biClrImportant := 0;
end;
SetStretchBltMode(Dest, COLORONCOLOR);
StretchDIBits(Dest, DstX, Pred(DstY + SrcHeight), SrcWidth, -SrcHeight,
SrcX, SrcY, SrcWidth, SrcHeight, Bitmap.Pixels, Info, DIB_RGB_COLORS, SRCCOPY);
end;
procedure WidgetSetStretchDrawRGB32Bitmap(Dest: HDC; DstX, DstY, DstWidth,
DstHeight: Integer; SrcX, SrcY, SrcWidth, SrcHeight: Integer;
Bitmap: TRGB32BitmapCore);
var
Info: BITMAPINFO;
begin
with Info.bmiHeader do
begin
biSize := SizeOf(BITMAPINFOHEADER);
biWidth := Bitmap.Width;
biHeight := Bitmap.Height;
biPlanes := 1;
biBitCount := 32;
biCompression := BI_RGB;
biSizeImage := 0;
biClrImportant := 0;
end;
SetStretchBltMode(Dest, COLORONCOLOR);
StretchDIBits(Dest, DstX, Pred(DstY + DstHeight), DstWidth, -DstHeight, SrcX, SrcY,
SrcWidth, SrcHeight, Bitmap.Pixels, Info, DIB_RGB_COLORS, SRCCOPY);
end;
procedure WidgetSetDrawRGB8Bitmap(Dest: HDC; DstX, DstY: Integer; SrcX, SrcY,
SrcWidth, SrcHeight: Integer; Bitmap: TRGB8BitmapCore);
var
Info: PBITMAPINFO;
I: Byte;
PColor: PRGBQUAD;
begin
GetMem(Info, SizeOf(BITMAPINFO) + 256 * SizeOf(RGBQUAD));
try
with Info^.bmiHeader do
begin
biSize := SizeOf(BITMAPINFOHEADER);
biWidth := Bitmap.Width;
biHeight := Bitmap.Height;
biPlanes := 1;
biBitCount := 8;
biCompression := BI_RGB;
biSizeImage := 0;
biClrUsed := 256;
biClrImportant := 0;
end;
PColor := @(Info^.bmiColors[0]);
for I := 0 to 255 do
begin
PColor^.rgbRed := I;
PColor^.rgbGreen := I;
PColor^.rgbBlue := I;
Inc(PColor);
end;
SetStretchBltMode(Dest, COLORONCOLOR);
StretchDIBits(Dest, DstX, Pred(DstY + SrcHeight), SrcWidth, -SrcHeight,
SrcX, SrcY, SrcWidth, SrcHeight, Bitmap.Pixels, Info^, DIB_RGB_COLORS, SRCCOPY);
finally
FreeMem(Info);
end;
end;
end.
|
