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Copy pathbgralclbitmap.pas
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1036 lines (943 loc) · 37.1 KB
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{ ***************************************************************************
* *
* This file is part of BGRABitmap library which is distributed under the *
* modified LGPL. *
* *
* See the file COPYING.modifiedLGPL.txt, 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. *
* *
************************* BGRABitmap library ******************************
- Drawing routines with transparency and antialiasing with Lazarus.
Offers also various transforms.
- These routines allow to manipulate 32bit images in BGRA format or RGBA
format (depending on the platform).
- This code is under modified LGPL (see COPYING.modifiedLGPL.txt).
This means that you can link this library inside your programs for any purpose.
Only the included part of the code must remain LGPL.
- If you make some improvements to this library, please notify here:
http://www.lazarus.freepascal.org/index.php/topic,12037.0.html
********************* Contact : Circular at operamail.com *******************
******************************* CONTRIBUTOR(S) ******************************
- Edivando S. Santos Brasil | mailedivando@gmail.com
(Compatibility with FPC ($Mode objfpc/delphi) and delphi VCL 11/2018)
***************************** END CONTRIBUTOR(S) *****************************}
Unit BGRALCLBitmap;
{$i bgrabitmap.inc}{$H+}
interface
uses
Classes, SysUtils, Graphics, BGRATypes,{$IFNDEF FPC}windows, Types,{$ENDIF} BGRAGraphics, BGRABitmapTypes, GraphType, BGRADefaultBitmap;
type
{ TBGRALCLBitmap }
TBGRALCLBitmap = class(TBGRADefaultBitmap)
protected
function LoadFromRawImage(ARawImage: TRawImage; DefaultOpacity: byte;
AlwaysReplaceAlpha: boolean = False; RaiseErrorOnInvalidPixelFormat: boolean = True): boolean; override;
function CreateDefaultFontRenderer: TBGRACustomFontRenderer; override;
procedure DoLoadFromBitmap; override;
procedure RebuildBitmap; override;
function CreatePtrBitmap(AWidth, AHeight: integer; AData: PBGRAPixel
): TBGRAPtrBitmap; override;
procedure AssignRasterImage(ARaster: TRasterImage); virtual;
procedure ExtractXorMask;
public
procedure Assign(Source: TPersistent); override;
procedure DataDrawTransparent(ACanvas: TCanvas; Rect: TRect;
AData: Pointer; ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer); override;
procedure DataDrawOpaque(ACanvas: TCanvas; ARect: TRect; AData: Pointer;
ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer); override;
procedure GetImageFromCanvas(CanvasSource: TCanvas; x, y: integer); override;
procedure LoadFromDevice({%H-}DC: HDC); override;
procedure LoadFromDevice({%H-}DC: HDC; {%H-}ARect: TRect); override;
procedure TakeScreenshotOfPrimaryMonitor; override;
procedure TakeScreenshot({%H-}ARect: TRect); override;
end;
{ TBGRALCLPtrBitmap }
TBGRALCLPtrBitmap = class(TBGRAPtrBitmap)
procedure RebuildBitmap; override;
function CreatePtrBitmap(AWidth, AHeight: Integer; AData: PBGRAPixel): TBGRAPtrBitmap; override;
function CreateDefaultFontRenderer: TBGRACustomFontRenderer; override;
function LoadFromRawImage(ARawImage: TRawImage; DefaultOpacity: byte;
AlwaysReplaceAlpha: boolean=False; {%H-}RaiseErrorOnInvalidPixelFormat: boolean
=True): boolean; override;
public
procedure GetImageFromCanvas(CanvasSource: TCanvas; x, y: Integer); override;
procedure DataDrawTransparent(ACanvas: TCanvas; Rect: TRect; AData: Pointer;
ALineOrder: TRawImageLineOrder; AWidth, AHeight: Integer); override;
procedure DataDrawOpaque(ACanvas: TCanvas; Rect: TRect; AData: Pointer;
ALineOrder: TRawImageLineOrder; AWidth, AHeight: Integer); override;
end;
implementation
uses BGRAText, {$IFDEF FPC}LCLType, LCLIntf,{$ENDIF} FPImage;
type
TCopyPixelProc = procedure (psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
procedure ApplyMask1bit(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; {%H-}sourcePixelSize: BGRAPtrInt; {%H-}defaultOpacity: byte);
var currentBit: byte;
begin
currentBit := 1;
while count > 0 do
begin
if psrc^ and currentBit <> 0 then pdest^.alpha := 0;
inc(pdest);
if currentBit = 128 then
begin
currentBit := 1;
inc(psrc);
end else
currentBit := currentBit shl 1;
dec(count);
end;
end;
procedure ApplyMask1bitRev(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; {%H-}sourcePixelSize: BGRAPtrInt; {%H-}defaultOpacity: byte);
var currentBit: byte;
begin
currentBit := 128;
while count > 0 do
begin
if psrc^ and currentBit <> 0 then pdest^.alpha := 0;
inc(pdest);
if currentBit = 1 then
begin
currentBit := 128;
inc(psrc);
end else
currentBit := currentBit shr 1;
dec(count);
end;
end;
procedure CopyFromBW_SetAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; {%H-}sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
var currentBit: byte;
begin
currentBit := 1;
while count > 0 do
begin
if psrc^ and currentBit <> 0 then
pdest^ := BGRAWhite
else
pdest^ := BGRABlack;
pdest^.alpha := DefaultOpacity;
inc(pdest);
if currentBit = 128 then
begin
currentBit := 1;
inc(psrc);
end else
currentBit := currentBit shl 1;
dec(count);
end;
end;
procedure CopyFromBW_SetAlphaBitRev(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; {%H-}sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
var currentBit: byte;
begin
currentBit := 128;
while count > 0 do
begin
if psrc^ and currentBit <> 0 then
pdest^ := BGRAWhite
else
pdest^ := BGRABlack;
pdest^.alpha := DefaultOpacity;
inc(pdest);
if currentBit = 1 then
begin
currentBit := 128;
inc(psrc);
end else
currentBit := currentBit shr 1;
dec(count);
end;
end;
procedure CopyFrom24Bit(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
begin
while count > 0 do
begin
{$IFDEF BDS}move(psrc^, pdest^, sizeof(BGRAWord));{$ELSE}PBGRAWord(pdest)^ := PBGRAWord(psrc)^;{$ENDIF}
(PByte(pdest)+2)^ := (psrc+2)^;
pdest^.alpha := DefaultOpacity;
inc(psrc,sourcePixelSize);
inc(pdest);
dec(count);
end;
end;
procedure CopyFrom24Bit_SwapRedBlue(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
begin
while count > 0 do
begin
PByte(pdest)^ := (psrc+2)^;
(PByte(pdest)+1)^ := (psrc+1)^;
(PByte(pdest)+2)^ := psrc^;
pdest^.alpha := DefaultOpacity;
inc(psrc,sourcePixelSize);
inc(pdest);
dec(count);
end;
end;
procedure CopyFromARGB_KeepAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; {%H-}defaultOpacity: byte);
{$IFDEF BDS}var _BGRADWord : BGRADWord;{$ENDIF}//#
begin
while count > 0 do
begin
{$IFDEF BDS}_BGRADWord{$ELSE}PBGRADWord(pdest)^{$ENDIF} := ((PByte(psrc)+3)^ shl TBGRAPixel_BlueShift) or
((PByte(psrc)+2)^ shl TBGRAPixel_GreenShift) or
((PByte(psrc)+1)^ shl TBGRAPixel_RedShift) or
(PByte(psrc)^ shl TBGRAPixel_AlphaShift);
{$IFDEF BDS}move(_BGRADWord, pdest^, sizeof(BGRADWord));{$ENDIF}
dec(count);
inc(pdest);
inc(psrc, sourcePixelSize);
end;
end;
procedure CopyFromARGB_SetAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
{$IFDEF BDS}var _BGRADWord : BGRADWord;{$ENDIF}//#
begin
while count > 0 do
begin
{$IFDEF BDS}_BGRADWord{$ELSE}PBGRADWord(pdest)^{$ENDIF} := ((PByte(psrc)+3)^ shl TBGRAPixel_BlueShift) or
((PByte(psrc)+2)^ shl TBGRAPixel_GreenShift) or
((PByte(psrc)+1)^ shl TBGRAPixel_RedShift) or
(DefaultOpacity shl TBGRAPixel_AlphaShift);
{$IFDEF BDS}move(_BGRADWord, pdest^, sizeof(BGRADWord));{$ENDIF}
inc(psrc, sourcePixelSize);
inc(pdest);
dec(count);
end;
end;
procedure CopyFromARGB_ReplaceZeroAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
const ARGB_ColorMask = {$IFDEF ENDIAN_LITTLE}$FFFFFF00{$ELSE}$00FFFFFF{$ENDIF};
ARGB_RedShift = {$IFDEF ENDIAN_LITTLE}8{$ELSE}16{$ENDIF};
ARGB_GreenShift = {$IFDEF ENDIAN_LITTLE}16{$ELSE}8{$ENDIF};
ARGB_BlueShift = {$IFDEF ENDIAN_LITTLE}24{$ELSE}0{$ENDIF};
var
sourceval: BGRANativeUInt;
alphaValue: BGRANativeUInt;
OpacityOrMask: BGRANativeUInt;
{$IFDEF BDS}_BGRADWord : BGRADWord;{$ENDIF}//#
begin
OpacityOrMask := DefaultOpacity shl TBGRAPixel_AlphaShift;
while count > 0 do
begin
{$IFDEF BDS}move(psrc^, sourceval, sizeof(BGRALongWord));{$ELSE}sourceval := PBGRALongWord(psrc)^;{$ENDIF}
alphaValue := {$IFDEF ENDIAN_LITTLE}sourceval and $ff{$ELSE}sourceval shr 24{$ENDIF};
if (alphaValue = 0) and ((sourceval and ARGB_ColorMask) <> 0) then //if not black but transparent
begin
{$IFDEF BDS}_BGRADWord{$ELSE}PBGRADWord(pdest)^{$ENDIF} := (((sourceval shr ARGB_BlueShift) and $ff) shl TBGRAPixel_BlueShift) or
(((sourceval shr ARGB_GreenShift) and $ff) shl TBGRAPixel_GreenShift) or
(((sourceval shr ARGB_RedShift) and $ff) shl TBGRAPixel_RedShift) or
OpacityOrMask;
{$IFDEF BDS}move(_BGRADWord, pdest^, sizeof(BGRADWord));{$ENDIF}
end else
begin
{$IFDEF BDS}_BGRADWord{$ELSE}PBGRADWord(pdest)^{$ENDIF} := (((sourceval shr ARGB_BlueShift) and $ff) shl TBGRAPixel_BlueShift) or
(((sourceval shr ARGB_GreenShift) and $ff) shl TBGRAPixel_GreenShift) or
(((sourceval shr ARGB_RedShift) and $ff) shl TBGRAPixel_RedShift) or
(alphaValue shl TBGRAPixel_AlphaShift);
{$IFDEF BDS}move(_BGRADWord, pdest^, sizeof(BGRADWord));{$ENDIF}
end;
dec(count);
inc(pdest);
inc(psrc, sourcePixelSize);
end;
end;
const
BGRA_AlphaMask = 255 shl TBGRAPixel_AlphaShift;
BGRA_RedMask = 255 shl TBGRAPixel_RedShift;
BGRA_GreenMask = 255 shl TBGRAPixel_GreenShift;
BGRA_BlueMask = 255 shl TBGRAPixel_BlueShift;
BGRA_ColorMask = BGRA_RedMask or BGRA_GreenMask or BGRA_BlueMask;
procedure CopyFrom32Bit_KeepAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; {%H-}defaultOpacity: byte);
begin
if sourcePixelSize = 4 then
move(psrc^,pdest^,count*sizeof(TBGRAPixel))
else
begin
while count > 0 do
begin
{$IFDEF BDS}move(psrc^, pdest^, sizeof(BGRADWord)){$ELSE}PBGRADWord(pdest)^ := PBGRADWord(psrc)^{$ENDIF};
dec(count);
inc(pdest);
inc(psrc, sourcePixelSize);
end;
end;
end;
procedure CopyFrom32Bit_SwapRedBlue_KeepAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; {%H-}defaultOpacity: byte);
var srcValue: BGRANativeUInt;
{$IFDEF BDS}_BGRADWord : BGRADWord;{$ENDIF}//#
begin
while count > 0 do
begin
{$IFDEF BDS}move(psrc^, srcValue, sizeof(BGRADWord));{$ELSE}srcValue := PBGRADWord(psrc)^;{$ENDIF}
{$IFDEF BDS}_BGRADWord{$ELSE}PBGRADWord(pdest)^{$ENDIF} := (srcValue and not (BGRA_RedMask or BGRA_BlueMask))
or (((srcValue and BGRA_RedMask) shr TBGRAPixel_RedShift) shl TBGRAPixel_BlueShift)
or (((srcValue and BGRA_BlueMask) shr TBGRAPixel_BlueShift) shl TBGRAPixel_RedShift);
{$IFDEF BDS}move(_BGRADWord, pdest^, sizeof(BGRADWord));{$ENDIF}
dec(count);
inc(pdest);
inc(psrc, sourcePixelSize);
end;
end;
procedure CopyFrom32Bit_SetAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
var
OpacityOrMask: BGRANativeUInt;
{$IFDEF BDS}_BGRADWord : BGRADWord;{$ENDIF}//#
begin
OpacityOrMask := DefaultOpacity shl TBGRAPixel_AlphaShift;
while count > 0 do
begin
{$IFDEF BDS}_BGRADWord{$ELSE}PBGRADWord(pdest)^{$ENDIF} := ({$IFDEF BDS}_BGRADWord{$ELSE}PBGRADWord(psrc)^{$ENDIF} and not BGRA_AlphaMask) or OpacityOrMask;
{$IFDEF BDS}move(_BGRADWord, pdest^, sizeof(BGRADWord));{$ENDIF}
inc(psrc, sourcePixelSize);
inc(pdest);
dec(count);
end;
end;
procedure CopyFrom32Bit_SwapRedBlue_SetAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
begin
while count > 0 do
begin
pdest^.red := PBGRAPixel(psrc)^.blue;
pdest^.green := PBGRAPixel(psrc)^.green;
pdest^.blue := PBGRAPixel(psrc)^.red;
pdest^.alpha := DefaultOpacity; //use default opacity
inc(psrc, sourcePixelSize);
inc(pdest);
dec(count);
end;
end;
procedure CopyFrom32Bit_ReplaceZeroAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
var sourceval: BGRANativeUInt;
OpacityOrMask : BGRANativeUInt;
{$IFDEF BDS}_BGRALongWord : BGRALongWord;{$ENDIF}//#
begin
OpacityOrMask := DefaultOpacity shl TBGRAPixel_AlphaShift;
while count > 0 do
begin
{$IFDEF BDS}move(psrc^, sourceval, sizeof(BGRALongWord));{$ELSE}sourceval := PBGRALongWord(psrc)^;{$ENDIF}
if ((sourceVal shr TBGRAPixel_AlphaShift) and $ff = 0) and ((sourceval and BGRA_ColorMask) <> 0) then //if not black but transparent
begin
{$IFDEF BDS}_BGRALongWord{$ELSE}PBGRALongWord(pdest)^{$ENDIF} := (sourceval and BGRA_ColorMask) or OpacityOrMask; //use default opacity
{$IFDEF BDS}move(_BGRALongWord, pdest^, sizeof(BGRALongWord));{$ENDIF}
end
else
begin
{$IFDEF BDS}move(psrc^, _BGRALongWord, sizeof(PBGRALongWord));{$ELSE}PBGRALongWord(pdest)^ := PBGRALongWord(psrc)^;{$ENDIF}
{$IFDEF BDS}move(_BGRALongWord, pdest^, sizeof(BGRALongWord));{$ENDIF}
end;
dec(count);
inc(pdest);
inc(psrc, sourcePixelSize);
end;
end;
procedure CopyFrom32Bit_SwapRedBlue_ReplaceZeroAlpha(psrc: PByte; pdest: PBGRAPixel; count: BGRANativeInt; sourcePixelSize: BGRAPtrInt; defaultOpacity: byte);
var sourceval: BGRANativeUInt;
OpacityOrMask : BGRANativeUInt;
{$IFDEF BDS}_BGRALongWord : BGRALongWord;{$ENDIF}//#
begin
OpacityOrMask := DefaultOpacity shl TBGRAPixel_AlphaShift;
while count > 0 do
begin
{$IFDEF BDS}move(psrc^, sourceval, sizeof(BGRALongWord));{$ELSE}sourceval := PBGRALongWord(psrc)^;{$ENDIF}
if ((sourceVal shr TBGRAPixel_AlphaShift) and $ff = 0) and ((sourceval and BGRA_ColorMask) <> 0) then //if not black but transparent
begin
{$IFDEF BDS}_BGRALongWord{$ELSE}PBGRALongWord(pdest)^{$ENDIF} := (((sourceval and BGRA_RedMask) shr TBGRAPixel_RedShift) shl TBGRAPixel_BlueShift)
or (((sourceval and BGRA_BlueMask) shr TBGRAPixel_BlueShift) shl TBGRAPixel_RedShift)
or (sourceval and BGRA_GreenMask)
or OpacityOrMask;
{$IFDEF BDS}move(_BGRALongWord, pdest^, sizeof(BGRALongWord));{$ENDIF}
end
else
begin
{$IFDEF BDS}_BGRALongWord{$ELSE}PBGRALongWord(pdest)^{$ENDIF} := (((sourceval and BGRA_RedMask) shr TBGRAPixel_RedShift) shl TBGRAPixel_BlueShift)
or (((sourceval and BGRA_BlueMask) shr TBGRAPixel_BlueShift) shl TBGRAPixel_RedShift)
or (sourceval and (BGRA_GreenMask or BGRA_AlphaMask));
{$IFDEF BDS}move(_BGRALongWord, pdest^, sizeof(BGRALongWord));{$ENDIF}
end;
dec(count);
inc(pdest);
inc(psrc, sourcePixelSize);
end;
end;
procedure DoCopyProc(ADestination: TBGRACustomBitmap; ACopyProc: TCopyPixelProc; AData: PByte; ABytesPerLine, ABitsPerPixel: integer; ALineOrder: TRawImageLineOrder; ADefaultOpacity: byte);
var
n: integer;
psource_byte, pdest_byte,
psource_first, pdest_first: PByte;
psource_delta, pdest_delta: integer;
begin
if (ALineOrder = ADestination.LineOrder) and
(ABytesPerLine = (ABitsPerPixel shr 3) * BGRACardinal(ADestination.Width)) then
ACopyProc(AData, ADestination.Data, ADestination.NbPixels, ABitsPerPixel shr 3, ADefaultOpacity)
else
begin
if ALineOrder = riloTopToBottom then
begin
psource_first := AData;
psource_delta := ABytesPerLine;
end else
begin
psource_first := AData + (ADestination.Height-1) * ABytesPerLine;
psource_delta := -ABytesPerLine;
end;
if ADestination.LineOrder = riloTopToBottom then
begin
pdest_first := PByte(ADestination.Data);
pdest_delta := ADestination.Width*sizeof(TBGRAPixel);
end else
begin
pdest_first := PByte(ADestination.Data) + (ADestination.Height-1)*ADestination.Width*sizeof(TBGRAPixel);
pdest_delta := -ADestination.Width*sizeof(TBGRAPixel);
end;
psource_byte := psource_first;
pdest_byte := pdest_first;
for n := ADestination.Height-1 downto 0 do
begin
ACopyProc(psource_byte, PBGRAPixel(pdest_byte), ADestination.Width, ABitsPerPixel shr 3, ADefaultOpacity);
inc(psource_byte, psource_delta);
inc(pdest_byte, pdest_delta);
end;
end;
end;
procedure ApplyRawImageMask(ADestination: TBGRACustomBitmap; const ARawImage: TRawImage);
var
copyProc: TCopyPixelProc;
begin
if (ARawImage.Description.MaskBitsPerPixel = 1) and (ARawImage.Mask <> nil) then
begin
if ARawImage.Description.BitOrder = riboBitsInOrder then
copyProc := @ApplyMask1bit
else
copyProc := @ApplyMask1bitRev;
DoCopyProc(ADestination, copyProc, ARawImage.Mask, ARawImage.Description.MaskBytesPerLine, ARawImage.Description.MaskBitsPerPixel, ARawImage.Description.LineOrder, 0);
ADestination.InvalidateBitmap;
end;
end;
{ Load raw image data. It must be 32bit, 24 bits or 1bit per pixel}
function LoadFromRawImageImplementation(ADestination: TBGRADefaultBitmap; const ARawImage: TRawImage;
DefaultOpacity: byte; AlwaysReplaceAlpha: boolean; RaiseErrorOnInvalidPixelFormat: boolean): boolean;
var
mustSwapRedBlue: boolean;
copyProc: TCopyPixelProc;
nbColorChannels: integer;
function FormatError(message: string): boolean;
begin
if RaiseErrorOnInvalidPixelFormat then
raise Exception.Create('Invalid raw image format. ' + message)
else
result := false;
end;
begin
if (ARawImage.Description.Width <> BGRACardinal(ADestination.Width)) or
(ARawImage.Description.Height <> BGRACardinal(ADestination.Height)) then
raise Exception.Create('Bitmap size is inconsistant');
if (ADestination.Height=0) or (ADestination.Width=0) then
begin
result := true;
exit;
end;
if ARawImage.Description.BitsPerPixel = 1 then
begin
if ARawImage.Description.BitOrder = riboBitsInOrder then
copyProc := @CopyFromBW_SetAlpha
else
copyProc := @CopyFromBW_SetAlphaBitRev;
DefaultOpacity := 255;
end else
begin
if ((ARawImage.Description.BitsPerPixel and 7) <> 0) then
begin
result := FormatError(IntToStr(ARawImage.Description.Depth) + 'bit found but multiple of 8bit expected');
exit;
end;
if (ARawImage.Description.BitsPerPixel < 24) then
begin
result := FormatError(IntToStr(ARawImage.Description.Depth) + 'bit found but at least 24bit expected');
exit;
end;
nbColorChannels := 0;
if (ARawImage.Description.RedPrec > 0) then inc(nbColorChannels);
if (ARawImage.Description.GreenPrec > 0) then inc(nbColorChannels);
if (ARawImage.Description.BluePrec > 0) then inc(nbColorChannels);
if (nbColorChannels < 3) then
begin
result := FormatError('One or more color channel is missing (RGB expected)');
exit;
end;
//channels are in ARGB order
if (ARawImage.Description.BitsPerPixel >= 32) and
(ARawImage.Description.AlphaPrec = 8) and
(((ARawImage.Description.AlphaShift = 0) and
(ARawImage.Description.RedShift = 8) and
(ARawImage.Description.GreenShift = 16) and
(ARawImage.Description.BlueShift = 24) and
(ARawImage.Description.ByteOrder = riboLSBFirst)) or
((ARawImage.Description.AlphaShift = ARawImage.Description.BitsPerPixel - 8) and
(ARawImage.Description.RedShift = ARawImage.Description.BitsPerPixel - 16) and
(ARawImage.Description.GreenShift = ARawImage.Description.BitsPerPixel - 24) and
(ARawImage.Description.BlueShift = ARawImage.Description.BitsPerPixel - 32) and
(ARawImage.Description.ByteOrder = riboMSBFirst))) then
begin
if AlwaysReplaceAlpha then
copyProc := @CopyFromARGB_SetAlpha
else if DefaultOpacity = 0 then
copyProc := @CopyFromARGB_KeepAlpha
else
copyProc := @CopyFromARGB_ReplaceZeroAlpha;
end
else //channels are in ARGB order but alpha is not used
if (ARawImage.Description.BitsPerPixel >= 32) and
(ARawImage.Description.AlphaPrec = 0) and
(((ARawImage.Description.RedShift = 8) and
(ARawImage.Description.GreenShift = 16) and
(ARawImage.Description.BlueShift = 24) and
(ARawImage.Description.ByteOrder = riboLSBFirst)) or
((ARawImage.Description.RedShift = ARawImage.Description.BitsPerPixel - 16) and
(ARawImage.Description.GreenShift = ARawImage.Description.BitsPerPixel - 24) and
(ARawImage.Description.BlueShift = ARawImage.Description.BitsPerPixel - 32) and
(ARawImage.Description.ByteOrder = riboMSBFirst))) then
begin
DefaultOpacity := 255;
copyProc := @CopyFromARGB_SetAlpha;
end
else
begin
//channels are in RGB order (alpha channel may follow)
if (ARawImage.Description.BitsPerPixel >= 24) and
(((ARawImage.Description.RedShift = 0) and
(ARawImage.Description.GreenShift = 8) and
(ARawImage.Description.BlueShift = 16) and
(ARawImage.Description.ByteOrder = riboLSBFirst)) or
((ARawImage.Description.RedShift = ARawImage.Description.BitsPerPixel - 8) and
(ARawImage.Description.GreenShift = ARawImage.Description.BitsPerPixel - 16) and
(ARawImage.Description.BlueShift = ARawImage.Description.BitsPerPixel - 24) and
(ARawImage.Description.ByteOrder = riboMSBFirst))) then
begin
mustSwapRedBlue:= not TBGRAPixel_RGBAOrder;
end
else
//channels are in BGR order (alpha channel may follow)
if (ARawImage.Description.BitsPerPixel >= 24) and
(((ARawImage.Description.BlueShift = 0) and
(ARawImage.Description.GreenShift = 8) and
(ARawImage.Description.RedShift = 16) and
(ARawImage.Description.ByteOrder = riboLSBFirst)) or
((ARawImage.Description.BlueShift = ARawImage.Description.BitsPerPixel - 8) and
(ARawImage.Description.GreenShift = ARawImage.Description.BitsPerPixel - 16) and
(ARawImage.Description.RedShift = ARawImage.Description.BitsPerPixel - 24) and
(ARawImage.Description.ByteOrder = riboMSBFirst))) then
begin
mustSwapRedBlue:= TBGRAPixel_RGBAOrder;
end
else
begin
result := FormatError('BitsPerPixel: ' + IntToStr(ARawImage.Description.BitsPerPixel) + ', '
+ 'RedShit: ' + IntToStr(ARawImage.Description.RedShift) + ', Prec: ' + IntToStr(ARawImage.Description.RedPrec)+ ', '
+ 'GreenShit: ' + IntToStr(ARawImage.Description.GreenShift) + ', Prec: ' + IntToStr(ARawImage.Description.GreenPrec)+ ', '
+ 'BlueShift: ' + IntToStr(ARawImage.Description.BlueShift) + ', Prec: ' + IntToStr(ARawImage.Description.BluePrec)+ ', '
+ 'AlphaShift: ' + IntToStr(ARawImage.Description.AlphaShift) + ', Prec: ' + IntToStr(ARawImage.Description.AlphaPrec) );
exit;
end;
if not mustSwapRedBlue then
begin
if ARawImage.Description.BitsPerPixel = 24 then
copyProc := @CopyFrom24Bit
else
if AlwaysReplaceAlpha or (ARawImage.Description.AlphaPrec = 0) then
copyProc := @CopyFrom32Bit_SetAlpha
else if DefaultOpacity = 0 then
copyProc := @CopyFrom32Bit_KeepAlpha
else
copyProc := @CopyFrom32Bit_ReplaceZeroAlpha;
end else
begin
if ARawImage.Description.BitsPerPixel = 24 then
copyProc := @CopyFrom24Bit_SwapRedBlue
else
if AlwaysReplaceAlpha or (ARawImage.Description.AlphaPrec = 0) then
copyProc := @CopyFrom32Bit_SwapRedBlue_SetAlpha
else if DefaultOpacity = 0 then
copyProc := @CopyFrom32Bit_SwapRedBlue_KeepAlpha
else
copyProc := @CopyFrom32Bit_SwapRedBlue_ReplaceZeroAlpha;
end;
end;
end;
DoCopyProc(ADestination, copyProc, ARawImage.Data, ARawImage.Description.BytesPerLine, ARawImage.Description.BitsPerPixel, ARawImage.Description.LineOrder, DefaultOpacity);
ADestination.InvalidateBitmap;
ApplyRawImageMask(ADestination, ARawImage);
result := true;
end;
{ Draw BGRA data to a canvas with transparency }
procedure DataDrawTransparentImplementation(ACanvas: TCanvas; Rect: TRect;
AData: Pointer; ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer);
var
Temp: TBitmap;
RawImage: TRawImage;
BitmapHandle, MaskHandle: HBitmap;
begin
RawImage.Init;
{$IFNDEF FPC}
RawImage.Description.Height := AHeight;
RawImage.Description.Width := AWidth;
{$ENDIF}
RawImage.Description.Init_BPP32_B8G8R8A8_BIO_TTB(AWidth, AHeight);
RawImage.Description.LineOrder := ALineOrder;
RawImage.Data := PByte(AData);
RawImage.DataSize := AWidth * AHeight * sizeof(TBGRAPixel);
if not RawImage_CreateBitmaps(RawImage, BitmapHandle, MaskHandle, False) then
raise FPImageException.Create('Failed to create bitmap handle');
Temp := TBitmap.Create;
Temp.Handle := BitmapHandle;
Temp.MaskHandle := MaskHandle;
ACanvas.StretchDraw(Rect, Temp);
Temp.Free;
end;
{ Draw BGRA data to a canvas without transparency }
procedure DataDrawOpaqueImplementation(ACanvas: TCanvas; Rect: TRect;
AData: Pointer; ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer);
var
Temp: TBitmap;
RawImage: TRawImage;
BitmapHandle, MaskHandle: HBitmap;
CreateResult: boolean;
tempShift: byte;
begin
if (AHeight = 0) or (AWidth = 0) then
exit;
RawImage.Init;
{$IFNDEF FPC}
RawImage.Description.Height := AHeight;
RawImage.Description.Width := AWidth;
{$ENDIF}
RawImage.Description.Init_BPP32_B8G8R8_BIO_TTB(AWidth,AHeight);
RawImage.Description.LineOrder := ALineOrder;
RawImage.Description.LineEnd := rileDWordBoundary;
RawImage.Data := PByte(AData);
RawImage.DataSize:= AWidth*AHeight*sizeof(TBGRAPixel);
if TBGRAPixel_RGBAOrder then
begin
tempShift := RawImage.Description.RedShift;
RawImage.Description.RedShift := RawImage.Description.BlueShift;
RawImage.Description.BlueShift := tempShift;
end;
CreateResult := RawImage_CreateBitmaps(RawImage, BitmapHandle, MaskHandle, False);
if not CreateResult then
raise FPImageException.Create('Failed to create bitmap handle');
Temp := TBitmap.Create;
Temp.Handle := BitmapHandle;
Temp.MaskHandle := MaskHandle;
ACanvas.StretchDraw(Rect, Temp);
Temp.Free;
end;
procedure GetImageFromCanvasImplementation(ADestination: TBGRADefaultBitmap; CanvasSource: TCanvas; x, y: integer);
var
bmp: TBitmap;
subBmp: TBGRACustomBitmap;
subRect: TRect;
cw,ch: integer;
begin
cw := CanvasSource.Width;
ch := CanvasSource.Height;
if (x < 0) or (y < 0) or (x+ADestination.Width > cw) or
(y+ADestination.Height > ch) then
begin
ADestination.FillTransparent;
if (x+ADestination.Width <= 0) or (y+ADestination.Height <= 0) or
(x >= cw) or (y >= ch) then
exit;
if (x > 0) then subRect.Left := x else subRect.Left := 0;
if (y > 0) then subRect.Top := y else subRect.Top := 0;
if (x+ADestination.Width > cw) then subRect.Right := cw else
subRect.Right := x+ADestination.Width;
if (y+ADestination.Height > ch) then subRect.Bottom := ch else
subRect.Bottom := y+ADestination.Height;
subBmp := ADestination.NewBitmap(subRect.Right-subRect.Left,subRect.Bottom-subRect.Top);
subBmp.GetImageFromCanvas(CanvasSource,subRect.Left,subRect.Top);
ADestination.PutImage(subRect.Left-x,subRect.Top-y,subBmp,dmSet);
subBmp.Free;
exit;
end;
bmp := TBitmap.Create;
bmp.PixelFormat := pf24bit;
bmp.Width := ADestination.Width;
bmp.Height := ADestination.Height;
bmp.Canvas.CopyRect(Classes.rect(0, 0, ADestination.Width, ADestination.Height), CanvasSource,
Classes.rect(x, y, x + ADestination.Width, y + ADestination.Height));
LoadFromRawImageImplementation(ADestination, bmp.RawImage, 255, True, False);
bmp.Free;
ADestination.InvalidateBitmap;
end;
{ TBGRALCLPtrBitmap }
procedure TBGRALCLPtrBitmap.RebuildBitmap;
var
RawImage: TRawImage;
BitmapHandle, MaskHandle: HBitmap;
begin
if FBitmap <> nil then
FBitmap.Free;
FBitmap := TBitmapTracker.Create(self);
if (FWidth > 0) and (FHeight > 0) then
begin
RawImage.Init;
{$IFNDEF FPC}
RawImage.Description.Height := FHeight;
RawImage.Description.Width := FWidth;
{$ENDIF}
if TBGRAPixel_RGBAOrder then
RawImage.Description.Init_BPP32_R8G8B8A8_BIO_TTB(FWidth, FHeight)
else
RawImage.Description.Init_BPP32_B8G8R8A8_BIO_TTB(FWidth, FHeight);
RawImage.Description.LineOrder := FLineOrder;
RawImage.Data := PByte(FData);
RawImage.DataSize := FWidth * FHeight * sizeof(TBGRAPixel);
if not RawImage_CreateBitmaps(RawImage, BitmapHandle, MaskHandle, False) then
raise FPImageException.Create('Failed to create bitmap handle');
FBitmap.Handle := BitmapHandle;
FBitmap.MaskHandle := MaskHandle;
end;
FBitmap.Canvas.AntialiasingMode := amOff;
FBitmapModified := False;
end;
function TBGRALCLPtrBitmap.CreatePtrBitmap(AWidth, AHeight: integer;
AData: PBGRAPixel): TBGRAPtrBitmap;
begin
Result:= TBGRALCLPtrBitmap.Create(AWidth,AHeight,AData);
end;
function TBGRALCLPtrBitmap.CreateDefaultFontRenderer: TBGRACustomFontRenderer;
begin
result := TLCLFontRenderer.Create;
end;
function TBGRALCLPtrBitmap.LoadFromRawImage(ARawImage: TRawImage;
DefaultOpacity: byte; AlwaysReplaceAlpha: boolean;
RaiseErrorOnInvalidPixelFormat: boolean): boolean;
begin
DiscardBitmapChange;
result := LoadFromRawImageImplementation(self,ARawImage,DefaultOpacity,AlwaysReplaceAlpha,RaiseErrorOnInvalidPixelFormat);
end;
procedure TBGRALCLPtrBitmap.GetImageFromCanvas(CanvasSource: TCanvas; x,
y: integer);
begin
DiscardBitmapChange;
GetImageFromCanvasImplementation(self,CanvasSource,x,y);
end;
procedure TBGRALCLPtrBitmap.DataDrawTransparent(ACanvas: TCanvas; Rect: TRect;
AData: Pointer; ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer);
begin
DataDrawTransparentImplementation(ACanvas, Rect, AData, ALineOrder, AWidth, AHeight);
end;
procedure TBGRALCLPtrBitmap.DataDrawOpaque(ACanvas: TCanvas; Rect: TRect;
AData: Pointer; ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer);
begin
DataDrawOpaqueImplementation(ACanvas, Rect, AData, ALineOrder, AWidth, AHeight);
end;
function TBGRALCLBitmap.LoadFromRawImage(ARawImage: TRawImage;
DefaultOpacity: byte; AlwaysReplaceAlpha: boolean;
RaiseErrorOnInvalidPixelFormat: boolean): boolean;
begin
DiscardBitmapChange;
result := LoadFromRawImageImplementation(self,ARawImage,DefaultOpacity,AlwaysReplaceAlpha,RaiseErrorOnInvalidPixelFormat);
end;
function TBGRALCLBitmap.CreateDefaultFontRenderer: TBGRACustomFontRenderer;
begin
result := TLCLFontRenderer.Create;
end;
procedure TBGRALCLBitmap.DoLoadFromBitmap;
begin
if FBitmap <> nil then
begin
LoadFromRawImage(FBitmap.RawImage, FCanvasOpacity);
if FAlphaCorrectionNeeded then DoAlphaCorrection;
end;
end;
procedure TBGRALCLBitmap.RebuildBitmap;
var
RawImage: TRawImage;
BitmapHandle, MaskHandle: HBitmap;
begin
if FBitmap <> nil then
FBitmap.Free;
FBitmap := TBitmapTracker.Create(self);
if (FWidth > 0) and (FHeight > 0) then
begin
RawImage.Init;
{$IFNDEF FPC}
RawImage.Description.Height := FHeight;
RawImage.Description.Width := FWidth;
{$ENDIF}
if TBGRAPixel_RGBAOrder then
RawImage.Description.Init_BPP32_R8G8B8A8_BIO_TTB(FWidth, FHeight)
else
RawImage.Description.Init_BPP32_B8G8R8A8_BIO_TTB(FWidth, FHeight);
RawImage.Description.LineOrder := FLineOrder;
RawImage.Data := PByte(FData);
RawImage.DataSize := FWidth * FHeight * sizeof(TBGRAPixel);
if not RawImage_CreateBitmaps(RawImage, BitmapHandle, MaskHandle, False) then
raise FPImageException.Create('Failed to create bitmap handle');
FBitmap.Handle := BitmapHandle;
FBitmap.MaskHandle := MaskHandle;
end;
FBitmap.Canvas.AntialiasingMode := amOff;
FBitmapModified := False;
FAlphaCorrectionNeeded:= false;
end;
function TBGRALCLBitmap.CreatePtrBitmap(AWidth, AHeight: integer;
AData: PBGRAPixel): TBGRAPtrBitmap;
begin
Result:= TBGRALCLPtrBitmap.Create(AWidth, AHeight, AData);
end;
procedure TBGRALCLBitmap.Assign(Source: TPersistent);
begin
if Source is TRasterImage then
begin
AssignRasterImage(TRasterImage(Source));
end else
inherited Assign(Source);
{$IFDEF FPC}//#
if Source is TCursorImage then
begin
HotSpot := TCursorImage(Source).HotSpot;
ExtractXorMask;
end
else if Source is TIcon then
begin
HotSpot := Point(0,0);
ExtractXorMask;
end;
{$ENDIF}
end;
procedure TBGRALCLBitmap.AssignRasterImage(ARaster: TRasterImage);
var TempBmp: TBitmap;
{$IFNDEF FPC}
var
RawImg: TRawImage;
i, i2, iSize, iForIni, iForFin, iLineSize : Integer;
PixelFormat : TPixelFormat;
{$ENDIF}
begin
DiscardBitmapChange;
SetSize(ARaster.Width, ARaster.Height);
{$IFNDEF FPC}
PixelFormat := ARaster.PixelFormat;
ARaster.PixelFormat := pf32bit;
RawImg.Init;
if RawImage_FromBitmap(RawImg, ARaster.Handle, ARaster.MaskHandle) then
begin
ARaster.AssignRawImage(RawImg);
end;
ARaster.PixelFormat := PixelFormat;
{$ENDIF}
if LoadFromRawImage(ARaster.RawImage,0,False,False) then
begin
If Empty then
begin
AlphaFill(255); // if bitmap seems to be empty, assume
// it is an opaque bitmap without alpha channel
ApplyRawImageMask(self, ARaster.RawImage);
end;
end else //#
if (ARaster is TBitmap) {$IFDEF FPC}or (ARaster is TCustomIcon){$ENDIF} then
begin //try to convert
TempBmp := TBitmap.Create;
TempBmp.Width := ARaster.Width;
TempBmp.Height := ARaster.Height;
TempBmp.Canvas.Draw(0,0,ARaster);
try
LoadFromRawImage(TempBmp.RawImage,255,False,true);
ApplyRawImageMask(self, ARaster.RawImage);
finally
TempBmp.Free;
end;
end else
raise Exception.Create('Unable to convert image to 24 bit');
end;
procedure TBGRALCLBitmap.ExtractXorMask;
var
y, x: Integer;
p: PBGRAPixel;
begin
DiscardXorMask;
for y := 0 to Height-1 do
begin
p := ScanLine[y];
for x := 0 to Width-1 do
begin
if (p^.alpha = 0) and (PBGRADWord(p)^<>0) then
begin
NeedXorMask;
XorMask.SetPixel(x,y, p^);
end;
inc(p);
end;
end;
end;
procedure TBGRALCLBitmap.DataDrawTransparent(ACanvas: TCanvas; Rect: TRect;
AData: Pointer; ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer);
begin
DataDrawTransparentImplementation(ACanvas, Rect, AData, ALineOrder, AWidth, AHeight);
end;
procedure TBGRALCLBitmap.DataDrawOpaque(ACanvas: TCanvas; ARect: TRect;
AData: Pointer; ALineOrder: TRawImageLineOrder; AWidth, AHeight: integer);
begin
DataDrawOpaqueImplementation(ACanvas, ARect, AData, ALineOrder, AWidth, AHeight);
end;
procedure TBGRALCLBitmap.GetImageFromCanvas(CanvasSource: TCanvas; x, y: integer
);
begin
DiscardBitmapChange;
GetImageFromCanvasImplementation(self,CanvasSource,x,y);
end;
procedure TBGRALCLBitmap.LoadFromDevice(DC: HDC);
var
rawImage: TRawImage;
sourceSize: TPoint;
begin
sourceSize := Point(0,0);
GetDeviceSize(DC, sourceSize);
if (sourceSize.x = 0) or (sourceSize.y = 0) then
begin
SetSize(0,0);
exit;
end;
try
if not RawImage_FromDevice(rawImage, DC, rect(0,0,sourceSize.x,sourceSize.y)) then
raise Exception.Create('Cannot get raw image from device');
SetSize(rawImage.Description.Width, rawImage.Description.Height);
LoadFromRawImage(rawImage,255);
finally
rawImage.FreeData;
end;
end;
procedure TBGRALCLBitmap.LoadFromDevice(DC: HDC; ARect: TRect);
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