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TargaImage.pas
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unit TargaImage;
{************************************************************************
* This program is under the terms of the MIT License
***********************************************************************}
interface
uses
WinApi.Windows, {Messages,} System.SysUtils, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.ClipBrd, System.AnsiStrings;
var
Color16to24: array[0..31] of Byte = (0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112,
120, 128, 136, 144, 152, 160, 168, 176, 184, 192, 200, 208,
216, 224, 232, 240, 248);
const
NO_COLORMAP_INCLUDED = 0;
COLORMAP_IS_INCLUDED = 1;
NO_IMAGEDATA_INCLUDED = 0;
COLORMAPPED_IMAGE = 1;
TRUECOLOR_IMAGE = 2;
BLACKANDWHITE_IMAGE = 3;
RLE_COLORMAPPED_IMAGE = 9;
RLE_TRUECOLOR_IMAGE = 10;
RLE_BLACKANDWHITE_IMAGE = 11;
CF_TARGA = 20;
type
TMouseLeaveEvent = procedure(Sender: TObject) of object;
TMouseEnterEvent = procedure(Sender: TObject) of object;
TTargaID = packed record
Length: Byte;
Text: PAnsiChar;
end;
TTargaColorMapSpec = packed record
FirstEntryIndex: Word;
ColorMapLength: Word;
ColorMapEntrySize: Byte;
end;
TTargaImageDescriptor = packed record
AlphaChannelBits: Byte;
Top: Boolean;
Left: Boolean;
end;
TTargaImageSpec = packed record
X: Word;
Y: Word;
Width: Word;
Height: Word;
PixelDepth: Byte;
ImageDescriptor: TTargaImageDescriptor;
end;
TRGBA = packed record
Red: Byte;
Green: Byte;
Blue: Byte;
Alpha: Byte;
end;
TColorMap = packed array[0..999] of TRGBA;
TTargaType = (ttNoImageData, ttColorMapedImage, ttTrueColorImage, ttBlackAndWhiteImage, ttRLEColorMapedImage,
ttRLETrueColorImage, ttRLEBlackAndWhiteImage);
TTargaViewType = (tvBitmap, tvAlphaChannel, tvUseAlphaChannel);
TTargaColorDepthType = (cd8bit, cd16bit, cd24bit, cd32bit);
TTargaClipboardType = (ctTarga, ctBitmap, ctAlphaChannel);
type
TTarga = class(TGraphic)
private
FColorDepth: TTargaColorDepthType;
FColorMapType: Byte;
FColorMap: TColorMap;
FColorMapSpec: TTargaColorMapSpec;
FID: TTargaID;
FImage: string;
FImageType: Byte;
FImageSpec: TTargaImageSpec;
FIncludeAlphaChannel: Boolean;
FTargaType: TTargaType;
FOnChange: TNotifyEvent;
FBitmap: TBitmap;
FAlphaChannel: TBitmap;
procedure ChangeBitmap(Sender: TObject);
procedure SetBitmap(Value: TBitmap);
procedure SetAlphaChannel(Value: TBitmap);
function RLEDecompress(DataLength: Integer; var RLEBuffer: PAnsiChar; var Buffer: PAnsiChar): Integer;
function RLECompress(DataLength: Integer; var RLEBuffer: PAnsiChar; var Buffer: PAnsiChar): Integer;
protected
procedure Changed(Sender: TObject); override;
procedure DefineProperties(Filer: TFiler); override;
procedure Draw(ACanvas: TCanvas; const Rect: TRect); override;
// function Equals(Graphic: TGraphic): Boolean; virtual;
function GetEmpty: Boolean; override;
function GetHeight: Integer; override;
// function GetPalette: HPALETTE; virtual;
// function GetTransparent: Boolean; virtual;
function GetWidth: Integer; override;
// procedure Progress(Sender: TObject; Stage: TProgressStage; PercentDone: Byte; RedrawNow: Boolean; const R: TRect; const Msg: string); dynamic;
procedure ReadData(Stream: TStream); override;
procedure SetHeight(Value: Integer); override;
// procedure SetPalette(Value: HPALETTE); virtual;
// procedure SetTransparent(Value: Boolean); virtual;
procedure SetWidth(Value: Integer); override;
procedure WriteData(Stream: TStream); override;
public
constructor Create; override;
destructor Destroy; override;
procedure LoadFromResourceName(Instance: THandle; const ResName: String);
procedure LoadFromResourceID(Instance: THandle; ResID: Integer);
procedure LoadFromFile(const FileName: string); override;
procedure LoadFromStream(Stream: TStream); override;
procedure LoadFromClipboardFormat(Format: Word; Data: THandle; Palette: HPALETTE); override;
procedure LoadFromClipboard(LoadType: TTargaClipboardType);
procedure SaveToFile(const FileName: string); override;
procedure SaveToStream(Stream: TStream); override;
procedure SaveToClipboardFormat(var Format: Word; var Data: THandle; var Palette: HPALETTE); override;
procedure SaveToClipboard(SaveType: TTargaClipboardType);
procedure Assign(Source: TPersistent); override;
property OnChange: TNotifyEvent read FOnChange write FOnChange;
property Bitmap: TBitmap read FBitmap write SetBitmap;
property AlphaChannel: TBitmap read FAlphaChannel write SetAlphaChannel;
end;
implementation
procedure Register;
begin
TPicture.RegisterFileFormat('tga', 'Targa image', TTarga);
TPicture.RegisterClipboardFormat(CF_TARGA, TTarga);
end;
function Right(Text: string; Count: Word): string;
begin
Result:=Copy(Text,Length(Text)-(Count-1),Count);
end;
constructor TTarga.Create;
begin
inherited Create;
FBitmap:=TBitmap.Create;
FBitmap.PixelFormat:=pf32bit;
FBitmap.OnChange:=ChangeBitmap;
FAlphaChannel:=TBitmap.Create;
FAlphaChannel.PixelFormat:=pf32bit;
FAlphaChannel.OnChange:=ChangeBitmap;
end;
destructor TTarga.Destroy;
begin
FBitmap.Free;
FAlphaChannel.Free;
inherited Destroy;
end;
procedure TTarga.ChangeBitmap(Sender: TObject);
begin
FBitmap.PixelFormat:=pf32bit;
FAlphaChannel.PixelFormat:=pf32bit;
end;
procedure TTarga.Changed(Sender: TObject);
begin
if Assigned(FOnChange) then FOnChange(self);
inherited Changed(Sender);
end;
procedure TTarga.DefineProperties(Filer: TFiler);
function DoWrite: Boolean;
begin
if Filer.Ancestor <> nil then
Result := not (Filer.Ancestor is TGraphic) or
not Equals(TGraphic(Filer.Ancestor))
else
Result := not Empty;
end;
begin
Filer.DefineBinaryProperty('Data', ReadData, WriteData, DoWrite);
end;
procedure TTarga.LoadFromFile(const FileName: string);
var fsOpen: TFileStream;
begin
fsOpen:=TFileStream.Create(FileName,fmShareDenyWrite);
try
LoadFromStream(fsOpen);
finally
fsOpen.Free;
end;
end;
procedure TTarga.SaveToFile(const FileName: string);
var fsOpen: TFileStream;
begin
if UpperCase(Right(FileName,3))='.BMP' then
begin
FBitmap.SaveToFile(FileName);
end
else
begin
fsOpen:=TFileStream.Create(FileName,fmCreate);
try
SaveToStream(fsOpen);
finally
fsOpen.Free;
end;
end;
end;
procedure TTarga.Draw(ACanvas: TCanvas; const Rect: TRect);
begin
StretchBlt(ACanvas.Handle, Rect.Left, Rect.Top, Rect.Right - Rect.Left,
Rect.Bottom - Rect.Top, FBitmap.Canvas.Handle, 0, 0, FBitmap.Width, FBitmap.Height, ACanvas.CopyMode);
end;
procedure TTarga.ReadData(Stream: TStream);
var CName: string[63];
tmpVersion: array[0..1] of Char;
begin
Stream.Read(CName[0], 1);
Stream.Read(CName[1], Integer(CName[0]));
if Assigned(Stream) then
begin
Stream.Read(tmpVersion, 2);
Stream.Seek(-2, soFromCurrent);
if tmpVersion = 'BM' then
Bitmap.LoadFromStream(Stream)
else
inherited ReadData(Stream);
end;
end;
procedure TTarga.WriteData(Stream: TStream);
var CName: string[63];
begin
with Stream do
begin
CName := ClassName;
Write(CName, Length(CName) + 1);
end;
FTargaType:=ttTrueColorImage;
FColorDepth:=cd32bit;
SaveToStream(Stream);
end;
procedure TTarga.SetBitmap(Value: TBitmap);
begin
if FBitmap <> Value then
begin
FBitmap.Assign(Value);
if Assigned(FOnChange) then FOnChange(self);
end;
end;
procedure TTarga.SetAlphaChannel(Value: TBitmap);
begin
if FAlphaChannel <> Value then
begin
FAlphaChannel.Assign(Value);
if Assigned(FOnChange) then FOnChange(self);
end;
end;
function TTarga.GetEmpty: Boolean;
begin
Result := FBitmap.Empty;
end;
function TTarga.GetHeight: Integer;
begin
Result:=FImageSpec.Height;
end;
function TTarga.GetWidth: Integer;
begin
Result:=FImageSpec.Width;
end;
procedure TTarga.SetHeight(Value: Integer);
begin
end;
procedure TTarga.SetWidth(Value: Integer);
begin
end;
procedure TTarga.Assign(Source: TPersistent);
begin
if Source is TTarga then
begin
FBitmap.Assign(TTarga(Source).FBitmap);
FAlphaChannel.Assign(TTarga(Source).FAlphaChannel);
end
else
inherited Assign(Source);
end;
procedure TTarga.LoadFromResourceName(Instance: THandle; const ResName: String);
var
Stream: TResourceStream;
begin
Stream := TResourceStream.Create(Instance, ResName, RT_RCDATA);
try
LoadFromStream(Stream);
finally
Stream.Free;
end;
end;
procedure TTarga.LoadFromResourceID(Instance: THandle; ResID: Integer);
var
Stream: TResourceStream;
begin
Stream := TResourceStream.CreateFromID(Instance, ResID, RT_RCDATA);
try
LoadFromStream(Stream);
finally
Stream.Free;
end;
end;
procedure TTarga.LoadFromStream(Stream: TStream);
var Buffer: PAnsiChar;
RLEBuffer: PAnsiChar;
i, j: Integer;
Color16: Word;
LineSize: Integer;
LineBuffer, AlphaBuffer: PByteArray;
tmp16: Word;
ReadLength: Integer;
procedure GetBAWImageType(IsRLE: Boolean);
var i, j: Integer;
begin
FColorDepth:=cd8bit;
FIncludeAlphaChannel:=False;
if IsRLE then FTargaType:=ttRLEBlackAndWhiteImage else FTargaType:=ttBlackAndWhiteImage;
if IsRLE then RLEBuffer:=AnsiStrAlloc(LineSize*2);
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)]
else LineBuffer:=FBitmap.ScanLine[i];
if IsRLE then
begin
ReadLength:=Stream.Read(RLEBuffer^,LineSize*2);
Stream.Position:=Stream.Position-ReadLength+RLEDecompress(FImageSpec.Width,RLEBuffer, Buffer);
end
else Stream.Read(Buffer^,LineSize);
for j:=0 to FImageSpec.Width-1 do
begin
LineBuffer[(j*4)]:=Ord(Buffer[j]);
LineBuffer[(j*4)+1]:=Ord(Buffer[j]);
LineBuffer[(j*4)+2]:=Ord(Buffer[j]);
end;
end;
end;
begin
Buffer:=AnsiStrAlloc(18);
Stream.Read(Buffer^,18);
FID.Length:=Ord(Buffer[0]);
FColorMapType:=Ord(Buffer[1]);
FImageType:=Ord(Buffer[2]);
FColorMapSpec.FirstEntryIndex:=Ord(Buffer[3])+Ord(Buffer[4])*256;
FColorMapSpec.ColorMapLength:=Ord(Buffer[5])+Ord(Buffer[6])*256;
FColorMapSpec.ColorMapEntrySize:=Ord(Buffer[7]);
FImageSpec.X:=Ord(Buffer[8])+Ord(Buffer[9])*256;
FImageSpec.Y:=Ord(Buffer[10])+Ord(Buffer[11])*256;
FImageSpec.Width:=Ord(Buffer[12])+Ord(Buffer[13])*256;
FImageSpec.Height:=Ord(Buffer[14])+Ord(Buffer[15])*256;
FImageSpec.PixelDepth:=Ord(Buffer[16]);
FImageSpec.ImageDescriptor.AlphaChannelBits:=Ord(Buffer[17]) and 15;
FImageSpec.ImageDescriptor.Top:=(Ord(Buffer[17]) and 32)=32;
FImageSpec.ImageDescriptor.Left:=(Ord(Buffer[17]) and 16)=16;
System.AnsiStrings.StrDispose(Buffer);
if FID.Length>0 then
begin
Stream.Read(Buffer^,FID.Length);
FID.Text:=Buffer;
System.AnsiStrings.StrDispose(Buffer);
end
else FID.Text:='';
if FColorMapType=1 then
begin
case FColorMapSpec.ColorMapEntrySize of
15: begin
Buffer:=AnsiStrAlloc(FColorMapSpec.ColorMapLength*2);
Stream.Read(Buffer^,FColorMapSpec.ColorMapLength*2);
for i:=0 to FColorMapSpec.ColorMapLength-1 do
begin
Color16:=Ord(Buffer[(i*2)+0])+Ord(Buffer[(i*2)+1])*256;
FColorMap[i].Blue:=Color16to24[Color16 and 31];
FColorMap[i].Green:=Color16to24[(Color16 and 992) shr 5];
FColorMap[i].Red:=Color16to24[(Color16 and 31744) shr 10];
FColorMap[i].Alpha:=0;
end;
end;
16: begin
Buffer:=AnsiStrAlloc(FColorMapSpec.ColorMapLength*2);
Stream.Read(Buffer^,FColorMapSpec.ColorMapLength*2);
for i:=0 to FColorMapSpec.ColorMapLength-1 do
begin
Color16:=Ord(Buffer[(i*2)+0])+Ord(Buffer[(i*2)+1])*256;
FColorMap[i].Blue:=Color16to24[Color16 and 31];
FColorMap[i].Green:=Color16to24[(Color16 and 992) shr 5];
FColorMap[i].Red:=Color16to24[(Color16 and 31744) shr 10];
FColorMap[i].Alpha:=0;
end;
end;
24: begin
Buffer:=AnsiStrAlloc(FColorMapSpec.ColorMapLength*3);
Stream.Read(Buffer^,FColorMapSpec.ColorMapLength*3);
for i:=0 to FColorMapSpec.ColorMapLength-1 do
begin
FColorMap[i].Blue:=Ord(Buffer[(i*3)+0]);
FColorMap[i].Green:=Ord(Buffer[(i*3)+1]);
FColorMap[i].Red:=Ord(Buffer[(i*3)+2]);
FColorMap[i].Alpha:=0;
end;
end;
32: begin
Buffer:=AnsiStrAlloc(FColorMapSpec.ColorMapLength*4);
Stream.Read(Buffer^,FColorMapSpec.ColorMapLength*4);
for i:=0 to FColorMapSpec.ColorMapLength-1 do
begin
FColorMap[i].Blue:=Ord(Buffer[(i*4)+0]);
FColorMap[i].Green:=Ord(Buffer[(i*4)+1]);
FColorMap[i].Red:=Ord(Buffer[(i*4)+2]);
FColorMap[i].Alpha:=Ord(Buffer[(i*4)+3]);
end;
end;
end;
System.AnsiStrings.StrDispose(Buffer);
end;
FBitmap.PixelFormat:=pf32bit;
FBitmap.Width:=FImageSpec.Width;
FBitmap.Height:=FImageSpec.Height;
FAlphaChannel.PixelFormat:=pf32bit;
FAlphaChannel.Width:=FImageSpec.Width;
FAlphaChannel.Height:=FImageSpec.Height;
LineSize:=FBitmap.Width*(FImageSpec.PixelDepth div 8);
Buffer:=AnsiStrAlloc(LineSize);
case FImageType of
NO_IMAGEDATA_INCLUDED:
begin
FTargaType:=ttNoImageData;
end;
COLORMAPPED_IMAGE:
begin
FTargaType:=ttColorMapedImage;
case FImageSpec.PixelDepth of
8: begin
FColorDepth:=cd8bit;
FIncludeAlphaChannel:=False;
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)]
else
LineBuffer:=FBitmap.ScanLine[i];
Stream.Read(Buffer^,LineSize);
for j:=0 to FImageSpec.Width-1 do
begin
LineBuffer[(j*4)]:=FColorMap[Ord(Buffer[j])].Blue;
LineBuffer[(j*4)+1]:=FColorMap[Ord(Buffer[j])].Green;
LineBuffer[(j*4)+2]:=FColorMap[Ord(Buffer[j])].Red;
end;
end;
end;
16: begin
end;
24: begin
end;
32: begin
end;
end;
end;
TRUECOLOR_IMAGE:
begin
FTargaType:=ttTrueColorImage;
case FImageSpec.PixelDepth of
16: begin
FColorDepth:=cd16bit;
FIncludeAlphaChannel:=False;
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)]
else
LineBuffer:=FBitmap.ScanLine[i];
Stream.Read(Buffer^,LineSize);
for j:=0 to FImageSpec.Width-1 do
begin
tmp16:=Ord(Buffer[j*2])+Ord(Buffer[j*2+1])*256;
LineBuffer[(j*4)]:=Color16to24[(tmp16 and 31)];
LineBuffer[(j*4)+1]:=Color16to24[((tmp16 and 992) shr 5)];
LineBuffer[(j*4)+2]:=Color16to24[((tmp16 and 31744) shr 10)];
end;
end;
end;
24: begin
FColorDepth:=cd24bit;
FIncludeAlphaChannel:=False;
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)]
else
LineBuffer:=FBitmap.ScanLine[i];
Stream.Read(Buffer^,LineSize);
for j:=0 to FImageSpec.Width-1 do
begin
LineBuffer[(j*4)]:=Ord(Buffer[j*3]);
LineBuffer[(j*4)+1]:=Ord(Buffer[j*3+1]);
LineBuffer[(j*4)+2]:=Ord(Buffer[j*3+2]);
end;
end;
end;
32: begin
FColorDepth:=cd32bit;
FIncludeAlphaChannel:=True;
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
begin
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)];
AlphaBuffer:=FAlphaChannel.ScanLine[FImageSpec.Height-(i+1)];
end
else
begin
LineBuffer:=FBitmap.ScanLine[i];
AlphaBuffer:=FAlphaChannel.ScanLine[i];
end;
Stream.Read(Buffer^,LineSize);
for j:=0 to FImageSpec.Width-1 do
begin
LineBuffer[(j*4)]:=Ord(Buffer[j*4]);
LineBuffer[(j*4)+1]:=Ord(Buffer[j*4+1]);
LineBuffer[(j*4)+2]:=Ord(Buffer[j*4+2]);
AlphaBuffer[(j*4)]:=Ord(Buffer[j*4+3]);
AlphaBuffer[(j*4)+1]:=Ord(Buffer[j*4+3]);
AlphaBuffer[(j*4)+2]:=Ord(Buffer[j*4+3]);
end;
end;
end;
end;
end;
BLACKANDWHITE_IMAGE: GetBAWImageType(False);
RLE_COLORMAPPED_IMAGE:
begin
FTargaType:=ttRLEColorMapedImage;
case FImageSpec.PixelDepth of
8: begin
FColorDepth:=cd8bit;
FIncludeAlphaChannel:=False;
RLEBuffer:=AnsiStrAlloc(LineSize*2);
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)]
else
LineBuffer:=FBitmap.ScanLine[i];
ReadLength:=Stream.Read(RLEBuffer^,LineSize*2);
Stream.Position:=Stream.Position-ReadLength+RLEDecompress(FImageSpec.Width,RLEBuffer, Buffer);
for j:=0 to FImageSpec.Width-1 do
begin
LineBuffer[(j*4)]:=FColorMap[Ord(Buffer[j])].Blue;
LineBuffer[(j*4)+1]:=FColorMap[Ord(Buffer[j])].Green;
LineBuffer[(j*4)+2]:=FColorMap[Ord(Buffer[j])].Red;
end;
end;
end;
16: begin
end;
24: begin
end;
32: begin
end;
end;
end;
RLE_TRUECOLOR_IMAGE:
begin
FTargaType:=ttRLETrueColorImage;
case FImageSpec.PixelDepth of
16: begin
FColorDepth:=cd16bit;
FIncludeAlphaChannel:=False;
RLEBuffer:=AnsiStrAlloc(LineSize*2);
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)]
else
LineBuffer:=FBitmap.ScanLine[i];
ReadLength:=Stream.Read(RLEBuffer^,LineSize*2);
Stream.Position:=Stream.Position-ReadLength+RLEDecompress(FImageSpec.Width*2,RLEBuffer, Buffer);
for j:=0 to FImageSpec.Width-1 do
begin
tmp16:=Ord(Buffer[j*2])+Ord(Buffer[j*2+1])*256;
LineBuffer[(j*4)]:=Color16to24[(tmp16 and 31)];
LineBuffer[(j*4)+1]:=Color16to24[((tmp16 and 992) shr 5)];
LineBuffer[(j*4)+2]:=Color16to24[((tmp16 and 31744) shr 10)];
end;
end;
System.AnsiStrings.StrDispose(RLEBuffer);
end;
24: begin
FColorDepth:=cd24bit;
FIncludeAlphaChannel:=False;
RLEBuffer:=AnsiStrAlloc(LineSize*2);
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)]
else
LineBuffer:=FBitmap.ScanLine[i];
ReadLength:=Stream.Read(RLEBuffer^,LineSize*2);
Stream.Position:=Stream.Position-ReadLength+RLEDecompress(FImageSpec.Width*3,RLEBuffer, Buffer);
for j:=0 to FImageSpec.Width-1 do
begin
LineBuffer[(j*4)]:=Ord(Buffer[j*3]);
LineBuffer[(j*4)+1]:=Ord(Buffer[j*3+1]);
LineBuffer[(j*4)+2]:=Ord(Buffer[j*3+2]);
end;
end;
System.AnsiStrings.StrDispose(RLEBuffer);
end;
32: begin
FColorDepth:=cd32bit;
FIncludeAlphaChannel:=True;
RLEBuffer:=AnsiStrAlloc(LineSize*2);
for i:=0 to FImageSpec.Height-1 do
begin
if not FImageSpec.ImageDescriptor.Top and not FImageSpec.ImageDescriptor.Left then
begin
LineBuffer:=FBitmap.ScanLine[FImageSpec.Height-(i+1)];
AlphaBuffer:=FAlphaChannel.ScanLine[FImageSpec.Height-(i+1)];
end
else
begin
LineBuffer:=FBitmap.ScanLine[i];
AlphaBuffer:=FAlphaChannel.ScanLine[i];
end;
ReadLength:=Stream.Read(RLEBuffer^,LineSize*2);
Stream.Position:=Stream.Position-ReadLength+RLEDecompress(FImageSpec.Width*4,RLEBuffer, Buffer);
for j:=0 to FImageSpec.Width-1 do
begin
LineBuffer[(j*4)]:=Ord(Buffer[j*4]);
LineBuffer[(j*4)+1]:=Ord(Buffer[j*4+1]);
LineBuffer[(j*4)+2]:=Ord(Buffer[j*4+2]);
AlphaBuffer[(j*4)]:=Ord(Buffer[j*4+3]);
AlphaBuffer[(j*4)+1]:=Ord(Buffer[j*4+3]);
AlphaBuffer[(j*4)+2]:=Ord(Buffer[j*4+3]);
end;
end;
System.AnsiStrings.StrDispose(RLEBuffer);
end;
end;
end;
RLE_BLACKANDWHITE_IMAGE: GetBAWImageType(True);
end;
System.AnsiStrings.StrDispose(Buffer);
if Assigned(FOnChange) then FOnChange(self);
end;
procedure TTarga.LoadFromClipboardFormat(Format: Word; Data: THandle; Palette: HPALETTE);
var tmpStream: TMemoryStream;
tmpLen: Cardinal;
i: Integer;
Buffer, NewBuffer: PChar;
begin
if (Format <> CF_TARGA) or (Data = 0) then Exit;
Buffer:=PChar(Data);
tmpStream:=TMemoryStream.Create;
tmpLen:=Ord(Buffer[0])+Ord(Buffer[1])*256+Ord(Buffer[2])*65536+Ord(Buffer[3])*16777216;
NewBuffer:=StrAlloc(tmpLen);
for i:=4 to tmpLen+3 do NewBuffer[i-4]:=Buffer[i];
tmpStream.Write(NewBuffer^,tmpLen+4);
StrDispose(NewBuffer);
tmpStream.Position:=0;
LoadFromStream(tmpStream);
tmpStream.Free;
end;
procedure TTarga.LoadFromClipboard(LoadType: TTargaClipboardType);
var tmpData, tmpPalette: Thandle;
begin
case LoadType of
ctTarga: begin
tmpData:=ClipBoard.GetAsHandle(CF_TARGA);
if tmpData=0 then Exit;
tmpPalette:=0;
LoadFromClipboardFormat(CF_TARGA, tmpData, tmpPalette);
end;
ctBitmap: begin
tmpData:=ClipBoard.GetAsHandle(CF_BITMAP);
if tmpData=0 then Exit;
tmpPalette:=0;
FBitmap.LoadFromClipboardFormat(CF_BITMAP, tmpData, tmpPalette);
end;
ctAlphaChannel: begin
tmpData:=ClipBoard.GetAsHandle(CF_BITMAP);
if tmpData=0 then Exit;
tmpPalette:=0;
FAlphaChannel.LoadFromClipboardFormat(CF_BITMAP, tmpData, tmpPalette);
end;
end;
if Assigned(FOnChange) then FOnChange(self);
end;
procedure TTarga.SaveToStream(Stream: TStream);
type
TRGBCount = record
RGBA: TRGBA;
Count: Integer;
end;
// TRGBCountPalete = array[0..MaxInt] of TRGBCount;
var Buffer: PAnsiChar;
RLEBuffer: PAnsiChar;
i, j: Integer;
Color16: Word;
LineSize, RLELineSize: Integer;
LineBuffer, AlphaBuffer: PByteArray;
{ ReadLength: Integer;
PaletePos: Integer;
tmpPalete: TRGBA;
CountPalete: TRGBCountPalete;
IsInPalete: Boolean;}
tmpPosition: Integer;
BytePerPixel: Byte;
begin
case FTargaType of
ttRLETrueColorImage:
begin
Buffer:=AnsiStrAlloc(18);
Buffer[0]:=Chr(0);
Buffer[1]:=Chr(0);
Buffer[2]:=Chr(RLE_TRUECOLOR_IMAGE);
Buffer[3]:=Chr(0);
Buffer[4]:=Chr(0);
Buffer[5]:=Chr(0);
Buffer[6]:=Chr(0);
Buffer[7]:=Chr(0);
Buffer[8]:=Chr(0);
Buffer[9]:=Chr(0);
Buffer[10]:=Chr(0);
Buffer[11]:=Chr(0);
Buffer[12]:=AnsiChar(Chr(FBitmap.Width mod 256));
Buffer[13]:=AnsiChar(Chr(FBitmap.Width div 256));
Buffer[14]:=AnsiChar(Chr(FBitmap.Height mod 256));
Buffer[15]:=AnsiChar(Chr(FBitmap.Height div 256));
Buffer[16]:=Chr(24);
Buffer[17]:=Chr(0);
Stream.Write(Buffer^,18);
System.AnsiStrings.StrDispose(Buffer);
LineSize:=FBitmap.Width*3;
Buffer:=AnsiStrAlloc(LineSize);
RLEBuffer:=AnsiStrAlloc(LineSize*2);
for i:=0 to FBitmap.Height-1 do
begin
LineBuffer:=FBitmap.ScanLine[FBitmap.Height-(i+1)];
for j:=0 to FBitmap.Width-1 do
begin
Buffer[j*3]:=AnsiChar(Chr(LineBuffer[j*4]));
Buffer[j*3+1]:=AnsiChar(Chr(LineBuffer[j*4+1]));
Buffer[j*3+2]:=AnsiChar(Chr(LineBuffer[j*4+2]));
end;
RLELineSize:=RLECompress(LineSize,RLEBuffer,Buffer);
tmpPosition:=Stream.Position;
Stream.Size:=Stream.Size+RLELineSize;
Stream.Position:=tmpPosition;
Stream.Write(RLEBuffer^,RLELineSize);
end;
System.AnsiStrings.StrDispose(Buffer);
System.AnsiStrings.StrDispose(RLEBuffer);
end;
else
begin
if (FBitmap.Width<>FAlphaChannel.Width) or (FBitmap.Height<>FAlphaChannel.Height) then
begin
FAlphaChannel.Width:=FBitmap.Width;
FAlphaChannel.Height:=FBitmap.Height;
end;
case FColorDepth of
cd16bit: BytePerPixel:=2;
cd24bit: BytePerPixel:=3;
cd32bit: BytePerPixel:=4;
else BytePerPixel:=3;
end;
Buffer:=AnsiStrAlloc(18);
Buffer[0]:=Chr(0);
Buffer[1]:=Chr(0);
Buffer[2]:=Chr(TRUECOLOR_IMAGE);
Buffer[3]:=Chr(0);
Buffer[4]:=Chr(0);
Buffer[5]:=Chr(0);
Buffer[6]:=Chr(0);
Buffer[7]:=Chr(0);
Buffer[8]:=Chr(0);
Buffer[9]:=Chr(0);
Buffer[10]:=Chr(0);
Buffer[11]:=Chr(0);
Buffer[12]:=AnsiChar(Chr(FBitmap.Width mod 256));
Buffer[13]:=AnsiChar(Chr(FBitmap.Width div 256));
Buffer[14]:=AnsiChar(Chr(FBitmap.Height mod 256));
Buffer[15]:=AnsiChar(Chr(FBitmap.Height div 256));
Buffer[16]:=AnsiChar(Chr(8*BytePerPixel));
Buffer[17]:=Chr(0);
Stream.Write(Buffer^,18);
System.AnsiStrings.StrDispose(Buffer);
LineSize:=FBitmap.Width*BytePerPixel;
Buffer:=AnsiStrAlloc(LineSize);
for i:=0 to FBitmap.Height-1 do
begin
LineBuffer:=FBitmap.ScanLine[FBitmap.Height-(i+1)];
AlphaBuffer:=FAlphaChannel.ScanLine[FBitmap.Height-(i+1)];
for j:=0 to FBitmap.Width-1 do
begin
case FColorDepth of
cd16bit: begin
Color16:=(Word(LineBuffer[j*4]) div 8) or ((Word(LineBuffer[(j*4)+1]) div 8) shl 5) or ((Word(LineBuffer[(j*4)+2]) div 8) shl 10);
Buffer[(j*2)]:=AnsiChar(Chr(Lo(Color16)));
Buffer[(j*2)+1]:=AnsiChar(Chr(Hi(Color16)));
end;
cd24bit: begin
Buffer[j*3]:=AnsiChar(Chr(LineBuffer[j*4]));
Buffer[j*3+1]:=AnsiChar(Chr(LineBuffer[j*4+1]));
Buffer[j*3+2]:=AnsiChar(Chr(LineBuffer[j*4+2]));
end;
cd32bit: begin
Buffer[j*4]:=AnsiChar(Chr(LineBuffer[j*4]));
Buffer[j*4+1]:=AnsiChar(Chr(LineBuffer[j*4+1]));
Buffer[j*4+2]:=AnsiChar(Chr(LineBuffer[j*4+2]));
Buffer[j*4+3]:=AnsiChar(Chr(AlphaBuffer[j*4]));
end;
end;
end;
Stream.Write(Buffer^,LineSize);
end;
System.AnsiStrings.StrDispose(Buffer);
end;
{ ttColorMapedImage:
begin
PaletePos:=0;
for i:=0 to Bitmap.Height-1 do
begin
LineBuffer:=Bitmap.ScanLine[Bitmap.Height+i];
for j:=0 to Bitmap.Width-1 do
begin
tmpPalete.Red:=Ord(LineBuffer[j*4]);
tmpPalete.Green:=Ord(LineBuffer[j*4+1]);
tmpPalete.Blue:=Ord(LineBuffer[j*4+2]);
tmpPalete.Alpha:=0;
IsInPalete:=False;
for k:=0 to PaletePos-1 do if tmpPalete=CountPalete[k].RGBA then
begin
IsInPalete:=True;
Inc(CountPalete[k].Count);
end;
if
end;
end;
Buffer:=StrAlloc(18);
Buffer[0]:=Chr(0);
Buffer[1]:=Chr(0);
Buffer[2]:=Chr(COLORMAPPED_IMAGE);
Buffer[3]:=Chr(0);
Buffer[4]:=Chr(0);
Buffer[5]:=Chr(0);
Buffer[6]:=Chr(0);
Buffer[7]:=Chr(0);
Buffer[8]:=Chr(0);
Buffer[9]:=Chr(0);
Buffer[10]:=Chr(0);
Buffer[11]:=Chr(0);
Buffer[12]:=Chr(Bitmap.Width mod 256);
Buffer[13]:=Chr(Bitmap.Width div 256);
Buffer[14]:=Chr(Bitmap.Height mod 256);
Buffer[15]:=Chr(Bitmap.Height div 256);
Buffer[16]:=Chr(8);
Buffer[17]:=Chr(0);
fsOpen.Size:=18+Bitmap.Width*Bitmap.Height*3;
fsOpen.Position:=0;
fsOpen.Write(Buffer^,18);
StrDispose(Buffer);
LineSize:=Bitmap.Width*3;
Buffer:=StrAlloc(LineSize);
RLEBuffer:=StrAlloc(LineSize*2);
for i:=0 to Bitmap.Height-1 do
begin
LineBuffer:=Bitmap.ScanLine[Bitmap.Height-(i+1)];
for j:=0 to Bitmap.Width-1 do
begin
Buffer[j*3]:=Chr(LineBuffer[j*4]);
Buffer[j*3+1]:=Chr(LineBuffer[j*4+1]);
Buffer[j*3+2]:=Chr(LineBuffer[j*4+2]);
end;
fsOpen.Write(Buffer^,LineSize);
end;
StrDispose(Buffer);
end;}
end;
end;
procedure TTarga.SaveToClipboardFormat(var Format: Word; var Data: THandle; var Palette: HPALETTE);
var tmpStream: TMemoryStream;
Buffer: PChar;
begin
Format:=CF_TARGA;
tmpStream:=TMemoryStream.Create;
SaveToStream(tmpStream);
Buffer:=StrAlloc(tmpStream.Size+4);
tmpStream.Position:=0;
Buffer[3]:=Char(tmpStream.Size div 16777216);
Buffer[2]:=Char((tmpStream.Size mod 16777216) div 65536);
Buffer[1]:=Char(((tmpStream.Size mod 16777216) mod 65536) div 256);
Buffer[0]:=Char(((tmpStream.Size mod 16777216) mod 65536) mod 256);
Inc(Buffer,4);
tmpStream.Read(Buffer^,tmpStream.Size);
Dec(Buffer,4);
Data:=Integer(Buffer);
Palette:=0;
tmpStream.Free;
end;
procedure TTarga.SaveToClipboard(SaveType: TTargaClipboardType);
var tmpFormat : Word;
tmpData : Thandle;
tmpPalette: HPALETTE;
begin
case SaveType of
ctTarga: begin
SaveToClipboardFormat(tmpFormat, tmpData, tmpPalette);
ClipBoard.SetAsHandle(tmpFormat,tmpData);
end;
ctBitmap: begin
FBitmap.SaveToClipboardFormat(tmpFormat, tmpData, tmpPalette);
ClipBoard.SetAsHandle(tmpFormat,tmpData);
end;
ctAlphaChannel: begin
FAlphaChannel.SaveToClipboardFormat(tmpFormat, tmpData, tmpPalette);
ClipBoard.SetAsHandle(tmpFormat,tmpData);
end;
end;
end;
function TTarga.RLEDecompress(DataLength: Integer; var RLEBuffer: PAnsiChar; var Buffer: PAnsiChar): Integer;
var RLEPacketType: Boolean;
RLEPacketLength: Integer;
RAWDataPosition: Integer;
RLEPacketPosition: Integer;
j: Integer;
begin
RLEPacketPosition:=0;
RAWDataPosition:=0;
case FImageSpec.PixelDepth of
8: begin
while True do
begin
RLEPacketType:=Ord(RLEBuffer[RLEPacketPosition])>127;
RLEPacketLength:=1+Ord(RLEBuffer[RLEPacketPosition]) and 127;
if RLEPacketType then
begin
for j:=0 to RLEPacketLength-1 do
begin
Buffer[RAWDataPosition]:=RLEBuffer[RLEPacketPosition+1];
Inc(RAWDataPosition);
end;
Inc(RLEPacketPosition,2)
end
else
begin
for j:=0 to RLEPacketLength-1 do
begin
Buffer[RAWDataPosition]:=RLEBuffer[RLEPacketPosition+j+1];
Inc(RAWDataPosition);
end;
Inc(RLEPacketPosition,RLEPacketLength+1)
end;
if RAWDataPosition>=DataLength then Break;
end;
end;
16: begin