www.pudn.com > DelphiX_for7.zip > DIB.pas
unit DIB;
interface
{$INCLUDE DelphiXcfg.inc}
uses
Windows, SysUtils, Classes, Graphics, Controls;
type
TRGBQuads = array[0..255] of TRGBQuad;
TPaletteEntries = array[0..255] of TPaletteEntry;
PBGR = ^TBGR;
TBGR = packed record
B, G, R: Byte;
end;
PArrayBGR = ^TArrayBGR;
TArrayBGR = array[0..10000] of TBGR;
PArrayByte = ^TArrayByte;
TArrayByte = array[0..10000] of Byte;
PArrayWord = ^TArrayWord;
TArrayWord = array[0..10000] of Word;
PArrayDWord = ^TArrayDWord;
TArrayDWord = array[0..10000] of DWord;
{ TDIB }
TDIBPixelFormat = record
RBitMask, GBitMask, BBitMask: DWORD;
RBitCount, GBitCount, BBitCount: DWORD;
RShift, GShift, BShift: DWORD;
RBitCount2, GBitCount2, BBitCount2: DWORD;
end;
TDIBSharedImage = class(TSharedImage)
private
FBitCount: Integer;
FBitmapInfo: PBitmapInfo;
FBitmapInfoSize: Integer;
FChangePalette: Boolean;
FColorTable: TRGBQuads;
FColorTablePos: Integer;
FCompressed: Boolean;
FDC: THandle;
FHandle: THandle;
FHeight: Integer;
FMemoryImage: Boolean;
FNextLine: Integer;
FOldHandle: THandle;
FPalette: HPalette;
FPaletteCount: Integer;
FPBits: Pointer;
FPixelFormat: TDIBPixelFormat;
FSize: Integer;
FTopPBits: Pointer;
FWidth: Integer;
FWidthBytes: Integer;
constructor Create;
procedure NewImage(AWidth, AHeight, ABitCount: Integer;
const PixelFormat: TDIBPixelFormat; const ColorTable: TRGBQuads; MemoryImage, Compressed: Boolean);
procedure Duplicate(Source: TDIBSharedImage; MemoryImage: Boolean);
procedure Compress(Source: TDIBSharedImage);
procedure Decompress(Source: TDIBSharedImage; MemoryImage: Boolean);
procedure ReadData(Stream: TStream; MemoryImage: Boolean);
function GetPalette: THandle;
procedure SetColorTable(const Value: TRGBQuads);
protected
procedure FreeHandle; override;
public
destructor Destroy; override;
end;
TDIB = class(TGraphic)
private
FCanvas: TCanvas;
FImage: TDIBSharedImage;
FProgressName: string;
FProgressOldY: DWORD;
FProgressOldTime: DWORD;
FProgressOld: DWORD;
FProgressY: DWORD;
{ For speed-up }
FBitCount: Integer;
FHeight: Integer;
FNextLine: Integer;
FNowPixelFormat: TDIBPixelFormat;
FPBits: Pointer;
FSize: Integer;
FTopPBits: Pointer;
FWidth: Integer;
FWidthBytes: Integer;
procedure AllocHandle;
procedure CanvasChanging(Sender: TObject);
procedure Changing(MemoryImage: Boolean);
procedure ConvertBitCount(ABitCount: Integer);
function GetBitmapInfo: PBitmapInfo;
function GetBitmapInfoSize: Integer;
function GetCanvas: TCanvas;
function GetHandle: THandle;
function GetPaletteCount: Integer;
function GetPixel(X, Y: Integer): DWORD;
function GetPBits: Pointer;
function GetPBitsReadOnly: Pointer;
function GetScanLine(Y: Integer): Pointer;
function GetScanLineReadOnly(Y: Integer): Pointer;
function GetTopPBits: Pointer;
function GetTopPBitsReadOnly: Pointer;
procedure SetBitCount(Value: Integer);
procedure SetImage(Value: TDIBSharedImage);
procedure SetNowPixelFormat(const Value: TDIBPixelFormat);
procedure SetPixel(X, Y: Integer; Value: DWORD);
procedure StartProgress(const Name: string);
procedure EndProgress;
procedure UpdateProgress(PercentY: Integer);
protected
procedure DefineProperties(Filer: TFiler); override;
procedure Draw(ACanvas: TCanvas; const Rect: TRect); override;
function GetEmpty: Boolean; override;
function GetHeight: Integer; override;
function GetPalette: HPalette; override;
function GetWidth: Integer; override;
procedure ReadData(Stream: TStream); override;
procedure SetHeight(Value: Integer); override;
procedure SetPalette(Value: HPalette); override;
procedure SetWidth(Value: Integer); override;
procedure WriteData(Stream: TStream); override;
public
ColorTable: TRGBQuads;
PixelFormat: TDIBPixelFormat;
constructor Create; override;
destructor Destroy; override;
procedure Assign(Source: TPersistent); override;
procedure Clear;
procedure Compress;
procedure Decompress;
procedure FreeHandle;
procedure LoadFromClipboardFormat(AFormat: Word; AData: THandle;
APalette: HPALETTE); override;
procedure LoadFromStream(Stream: TStream); override;
procedure SaveToClipboardFormat(var AFormat: Word; var AData: THandle;
var APalette: HPALETTE); override;
procedure SaveToStream(Stream: TStream); override;
procedure SetSize(AWidth, AHeight, ABitCount: Integer);
procedure UpdatePalette;
{ Special effect }
procedure Blur(ABitCount: Integer; Radius: Integer);
procedure Greyscale(ABitCount: Integer);
procedure Mirror(MirrorX, MirrorY: Boolean);
procedure Negative;
property BitCount: Integer read FBitCount write SetBitCount;
property BitmapInfo: PBitmapInfo read GetBitmapInfo;
property BitmapInfoSize: Integer read GetBitmapInfoSize;
property Canvas: TCanvas read GetCanvas;
property Handle: THandle read GetHandle;
property Height: Integer read FHeight write SetHeight;
property NextLine: Integer read FNextLine;
property NowPixelFormat: TDIBPixelFormat read FNowPixelFormat write SetNowPixelFormat;
property PaletteCount: Integer read GetPaletteCount;
property PBits: Pointer read GetPBits;
property PBitsReadOnly: Pointer read GetPBitsReadOnly;
property Pixels[X, Y: Integer]: DWORD read GetPixel write SetPixel;
property ScanLine[Y: Integer]: Pointer read GetScanLine;
property ScanLineReadOnly[Y: Integer]: Pointer read GetScanLineReadOnly;
property Size: Integer read FSize;
property TopPBits: Pointer read GetTopPBits;
property TopPBitsReadOnly: Pointer read GetTopPBitsReadOnly;
property Width: Integer read FWidth write SetWidth;
property WidthBytes: Integer read FWidthBytes;
end;
TDIBitmap = class(TDIB) end;
{ TCustomDXDIB }
TCustomDXDIB = class(TComponent)
private
FDIB: TDIB;
procedure SetDIB(Value: TDIB);
public
constructor Create(AOnwer: TComponent); override;
destructor Destroy; override;
property DIB: TDIB read FDIB write SetDIB;
end;
{ TDXDIB }
TDXDIB = class(TCustomDXDIB)
published
property DIB;
end;
{ TCustomDXPaintBox }
TCustomDXPaintBox = class(TGraphicControl)
private
FAutoStretch: Boolean;
FCenter: Boolean;
FDIB: TDIB;
FKeepAspect: Boolean;
FStretch: Boolean;
FViewWidth: Integer;
FViewHeight: Integer;
procedure SetAutoStretch(Value: Boolean);
procedure SetCenter(Value: Boolean);
procedure SetDIB(Value: TDIB);
procedure SetKeepAspect(Value: Boolean);
procedure SetStretch(Value: Boolean);
procedure SetViewWidth(Value: Integer);
procedure SetViewHeight(Value: Integer);
protected
function GetPalette: HPALETTE; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure Paint; override;
property AutoStretch: Boolean read FAutoStretch write SetAutoStretch;
property Canvas;
property Center: Boolean read FCenter write SetCenter;
property DIB: TDIB read FDIB write SetDIB;
property KeepAspect: Boolean read FKeepAspect write SetKeepAspect;
property Stretch: Boolean read FStretch write SetStretch;
property ViewWidth: Integer read FViewWidth write SetViewWidth;
property ViewHeight: Integer read FViewHeight write SetViewHeight;
end;
{ TDXPaintBox }
TDXPaintBox = class(TCustomDXPaintBox)
published
{$IFDEF DelphiX_Spt4}property Anchors;{$ENDIF}
property AutoStretch;
property Center;
{$IFDEF DelphiX_Spt4}property Constraints;{$ENDIF}
property DIB;
property KeepAspect;
property Stretch;
property ViewWidth;
property ViewHeight;
property Align;
property DragCursor;
property DragMode;
property Enabled;
property ParentShowHint;
property PopupMenu;
property ShowHint;
property Visible;
property OnClick;
property OnDblClick;
property OnDragDrop;
property OnDragOver;
property OnEndDrag;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnStartDrag;
end;
function MakeDIBPixelFormat(RBitCount, GBitCount, BBitCount: Integer): TDIBPixelFormat;
function MakeDIBPixelFormatMask(RBitMask, GBitMask, BBitMask: Integer): TDIBPixelFormat;
function pfRGB(const PixelFormat: TDIBPixelFormat; R, G, B: Byte): DWORD;
procedure pfGetRGB(const PixelFormat: TDIBPixelFormat; Color: DWORD; var R, G, B: Byte);
function pfGetRValue(const PixelFormat: TDIBPixelFormat; Color: DWORD): Byte;
function pfGetGValue(const PixelFormat: TDIBPixelFormat; Color: DWORD): Byte;
function pfGetBValue(const PixelFormat: TDIBPixelFormat; Color: DWORD): Byte;
function GreyscaleColorTable: TRGBQuads;
function RGBQuad(R, G, B: Byte): TRGBQuad;
function PaletteEntryToRGBQuad(const Entry: TPaletteEntry): TRGBQuad;
function PaletteEntriesToRGBQuads(const Entries: TPaletteEntries): TRGBQuads;
function RGBQuadToPaletteEntry(const RGBQuad: TRGBQuad): TPaletteEntry;
function RGBQuadsToPaletteEntries(const RGBQuads: TRGBQuads): TPaletteEntries;
implementation
uses DXConsts;
function Max(B1, B2: Integer): Integer;
begin
if B1>=B2 then Result := B1 else Result := B2;
end;
function MakeDIBPixelFormat(RBitCount, GBitCount, BBitCount: Integer): TDIBPixelFormat;
begin
Result.RBitMask := ((1 shl RBitCount)-1) shl (GBitCount+BBitCount);
Result.GBitMask := ((1 shl GBitCount)-1) shl (BBitCount);
Result.BBitMask := (1 shl BBitCount)-1;
Result.RBitCount := RBitCount;
Result.GBitCount := GBitCount;
Result.BBitCount := BBitCount;
Result.RBitCount2 := 8-RBitCount;
Result.GBitCount2 := 8-GBitCount;
Result.BBitCount2 := 8-BBitCount;
Result.RShift := (GBitCount+BBitCount)-(8-RBitCount);
Result.GShift := BBitCount-(8-GBitCount);
Result.BShift := 8-BBitCount;
end;
function MakeDIBPixelFormatMask(RBitMask, GBitMask, BBitMask: Integer): TDIBPixelFormat;
function GetBitCount(b: Integer): Integer;
var
i: Integer;
begin
i := 0;
while (i<31) and (((1 shl i) and b)=0) do Inc(i);
Result := 0;
while ((1 shl i) and b)<>0 do
begin
Inc(i);
Inc(Result);
end;
end;
begin
Result := MakeDIBPixelFormat(GetBitCount(RBitMask), GetBitCount(GBitMask),
GetBitCount(BBitMask));
end;
function pfRGB(const PixelFormat: TDIBPixelFormat; R, G, B: Byte): DWORD;
begin
with PixelFormat do
Result := ((R shl RShift) and RBitMask) or ((G shl GShift) and GBitMask) or
((B shr BShift) and BBitMask);
end;
procedure pfGetRGB(const PixelFormat: TDIBPixelFormat; Color: DWORD; var R, G, B: Byte);
begin
with PixelFormat do
begin
R := (Color and RBitMask) shr RShift;
R := R or (R shr RBitCount2);
G := (Color and GBitMask) shr GShift;
G := G or (G shr GBitCount2);
B := (Color and BBitMask) shl BShift;
B := B or (B shr BBitCount2);
end;
end;
function pfGetRValue(const PixelFormat: TDIBPixelFormat; Color: DWORD): Byte;
begin
with PixelFormat do
begin
Result := (Color and RBitMask) shr RShift;
Result := Result or (Result shr RBitCount);
end;
end;
function pfGetGValue(const PixelFormat: TDIBPixelFormat; Color: DWORD): Byte;
begin
with PixelFormat do
begin
Result := (Color and GBitMask) shr GShift;
Result := Result or (Result shr GBitCount);
end;
end;
function pfGetBValue(const PixelFormat: TDIBPixelFormat; Color: DWORD): Byte;
begin
with PixelFormat do
begin
Result := (Color and BBitMask) shl BShift;
Result := Result or (Result shr BBitCount);
end;
end;
function GreyscaleColorTable: TRGBQuads;
var
i: Integer;
begin
for i:=0 to 255 do
with Result[i] do
begin
rgbRed := i;
rgbGreen := i;
rgbBlue := i;
rgbReserved := 0;
end;
end;
function RGBQuad(R, G, B: Byte): TRGBQuad;
begin
with Result do
begin
rgbRed := R;
rgbGreen := G;
rgbBlue := B;
rgbReserved := 0;
end;
end;
function PaletteEntryToRGBQuad(const Entry: TPaletteEntry): TRGBQuad;
begin
with Result do
with Entry do
begin
rgbRed := peRed;
rgbGreen := peGreen;
rgbBlue := peBlue;
rgbReserved := 0;
end;
end;
function PaletteEntriesToRGBQuads(const Entries: TPaletteEntries): TRGBQuads;
var
i: Integer;
begin
for i:=0 to 255 do
Result[i] := PaletteEntryToRGBQuad(Entries[i]);
end;
function RGBQuadToPaletteEntry(const RGBQuad: TRGBQuad): TPaletteEntry;
begin
with Result do
with RGBQuad do
begin
peRed := rgbRed;
peGreen := rgbGreen;
peBlue := rgbBlue;
peFlags := 0;
end;
end;
function RGBQuadsToPaletteEntries(const RGBQuads: TRGBQuads): TPaletteEntries;
var
i: Integer;
begin
for i:=0 to 255 do
Result[i] := RGBQuadToPaletteEntry(RGBQuads[i]);
end;
{ TDIBSharedImage }
type
PLocalDIBPixelFormat = ^TLocalDIBPixelFormat;
TLocalDIBPixelFormat = packed record
RBitMask, GBitMask, BBitMask: DWORD;
end;
TPaletteItem = class(TCollectionItem)
private
ID: Integer;
Palette: HPalette;
RefCount: Integer;
ColorTable: TRGBQuads;
ColorTableCount: Integer;
destructor Destroy; override;
procedure AddRef;
procedure Release;
end;
TPaletteManager = class
private
FList: TCollection;
constructor Create;
destructor Destroy; override;
function CreatePalette(const ColorTable: TRGBQuads; ColorTableCount: Integer): HPalette;
procedure DeletePalette(var Palette: HPalette);
end;
destructor TPaletteItem.Destroy;
begin
DeleteObject(Palette);
inherited Destroy;
end;
procedure TPaletteItem.AddRef;
begin
Inc(RefCount);
end;
procedure TPaletteItem.Release;
begin
Dec(RefCount);
if RefCount<=0 then Free;
end;
constructor TPaletteManager.Create;
begin
inherited Create;
FList := TCollection.Create(TPaletteItem);
end;
destructor TPaletteManager.Destroy;
begin
FList.Free;
inherited Destroy;
end;
function TPaletteManager.CreatePalette(const ColorTable: TRGBQuads; ColorTableCount: Integer): HPalette;
type
TMyLogPalette = record
palVersion: Word;
palNumEntries: Word;
palPalEntry: TPaletteEntries;
end;
var
i, ID: Integer;
Item: TPaletteItem;
LogPalette: TMyLogPalette;
begin
{ Hash key making }
ID := ColorTableCount;
for i:=0 to ColorTableCount-1 do
with ColorTable[i] do
begin
Inc(ID, rgbRed);
Inc(ID, rgbGreen);
Inc(ID, rgbBlue);
end;
{ Does the same palette already exist? }
for i:=0 to FList.Count-1 do
begin
Item := TPaletteItem(FList.Items[i]);
if (Item.ID=ID) and (Item.ColorTableCount=ColorTableCount) and
CompareMem(@Item.ColorTable, @ColorTable, ColorTableCount*SizeOf(TRGBQuad)) then
begin
Item.AddRef; Result := Item.Palette;
Exit;
end;
end;
{ New palette making }
Item := TPaletteItem.Create(FList);
Item.ID := ID;
Move(ColorTable, Item.ColorTable, ColorTableCount*SizeOf(TRGBQuad));
Item.ColorTableCount := ColorTableCount;
with LogPalette do
begin
palVersion := $300;
palNumEntries := ColorTableCount;
palPalEntry := RGBQuadsToPaletteEntries(ColorTable);
end;
Item.Palette := Windows.CreatePalette(PLogPalette(@LogPalette)^);
Item.AddRef; Result := Item.Palette;
end;
procedure TPaletteManager.DeletePalette(var Palette: HPalette);
var
i: Integer;
Item: TPaletteItem;
begin
if Palette=0 then Exit;
for i:=0 to FList.Count-1 do
begin
Item := TPaletteItem(FList.Items[i]);
if (Item.Palette=Palette) then
begin
Palette := 0;
Item.Release;
Exit;
end;
end;
end;
var
FPaletteManager: TPaletteManager;
function PaletteManager: TPaletteManager;
begin
if FPaletteManager=nil then
FPaletteManager := TPaletteManager.Create;
Result := FPaletteManager;
end;
constructor TDIBSharedImage.Create;
begin
inherited Create;
FMemoryImage := True;
SetColorTable(GreyscaleColorTable);
FColorTable := GreyscaleColorTable;
FPixelFormat := MakeDIBPixelFormat(8, 8, 8);
end;
procedure TDIBSharedImage.NewImage(AWidth, AHeight, ABitCount: Integer;
const PixelFormat: TDIBPixelFormat; const ColorTable: TRGBQuads; MemoryImage, Compressed: Boolean);
var
InfoOfs: Integer;
UsePixelFormat: Boolean;
begin
Create;
{ Pixel format check }
case ABitCount of
1 : if not ((PixelFormat.RBitMask=$FF0000) and (PixelFormat.GBitMask=$00FF00) and (PixelFormat.BBitMask=$0000FF)) then
raise EInvalidGraphicOperation.Create(SInvalidDIBPixelFormat);
4 : if not ((PixelFormat.RBitMask=$FF0000) and (PixelFormat.GBitMask=$00FF00) and (PixelFormat.BBitMask=$0000FF)) then
raise EInvalidGraphicOperation.Create(SInvalidDIBPixelFormat);
8 : if not ((PixelFormat.RBitMask=$FF0000) and (PixelFormat.GBitMask=$00FF00) and (PixelFormat.BBitMask=$0000FF)) then
raise EInvalidGraphicOperation.Create(SInvalidDIBPixelFormat);
16: begin
if not (((PixelFormat.RBitMask=$7C00) and (PixelFormat.GBitMask=$03E0) and (PixelFormat.BBitMask=$001F)) or
((PixelFormat.RBitMask=$F800) and (PixelFormat.GBitMask=$07E0) and (PixelFormat.BBitMask=$001F))) then
raise EInvalidGraphicOperation.Create(SInvalidDIBPixelFormat);
end;
24: begin
if not ((PixelFormat.RBitMask=$FF0000) and (PixelFormat.GBitMask=$00FF00) and (PixelFormat.BBitMask=$0000FF)) then
raise EInvalidGraphicOperation.Create(SInvalidDIBPixelFormat);
end;
32: begin
if not ((PixelFormat.RBitMask=$FF0000) and (PixelFormat.GBitMask=$00FF00) and (PixelFormat.BBitMask=$0000FF)) then
raise EInvalidGraphicOperation.Create(SInvalidDIBPixelFormat);
end;
else
raise EInvalidGraphicOperation.CreateFmt(SInvalidDIBBitCount, [ABitCount]);
end;
FBitCount := ABitCount;
FHeight := AHeight;
FWidth := AWidth;
FWidthBytes := (((AWidth*ABitCount)+31) shr 5) * 4;
FNextLine := -FWidthBytes;
FSize := FWidthBytes*FHeight;
UsePixelFormat := ABitCount in [16, 32];
FPixelFormat := PixelFormat;
FPaletteCount := 0;
if FBitCount<=8 then
FPaletteCount := 1 shl FBitCount;
FBitmapInfoSize := SizeOf(TBitmapInfoHeader);
if UsePixelFormat then
Inc(FBitmapInfoSize, SizeOf(TLocalDIBPixelFormat));
Inc(FBitmapInfoSize, SizeOf(TRGBQuad)*FPaletteCount);
GetMem(FBitmapInfo, FBitmapInfoSize);
FillChar(FBitmapInfo^, FBitmapInfoSize, 0);
{ BitmapInfo setting. }
with FBitmapInfo^.bmiHeader do
begin
biSize := SizeOf(TBitmapInfoHeader);
biWidth := FWidth;
biHeight := FHeight;
biPlanes := 1;
biBitCount := FBitCount;
if UsePixelFormat then
biCompression := BI_BITFIELDS
else
begin
if (FBitCount=4) and (Compressed) then
biCompression := BI_RLE4
else if (FBitCount=8) and (Compressed) then
biCompression := BI_RLE8
else
biCompression := BI_RGB;
end;
biSizeImage := FSize;
biXPelsPerMeter := 0;
biYPelsPerMeter := 0;
biClrUsed := 0;
biClrImportant := 0;
end;
InfoOfs := SizeOf(TBitmapInfoHeader);
if UsePixelFormat then
begin
with PLocalDIBPixelFormat(Integer(FBitmapInfo)+InfoOfs)^ do
begin
RBitMask := PixelFormat.RBitMask;
GBitMask := PixelFormat.GBitMask;
BBitMask := PixelFormat.BBitMask;
end;
Inc(InfoOfs, SizeOf(TLocalDIBPixelFormat));
end;
FColorTablePos := InfoOfs;
FColorTable := ColorTable;
Move(FColorTable, Pointer(Integer(FBitmapInfo)+FColorTablePos)^, SizeOf(TRGBQuad)*FPaletteCount);
FCompressed := FBitmapInfo^.bmiHeader.biCompression in [BI_RLE4, BI_RLE8];
FMemoryImage := MemoryImage or FCompressed;
{ DIB making. }
if not Compressed then
begin
if MemoryImage then
begin
FPBits := Pointer(GlobalAlloc(GMEM_FIXED, FSize));
if FPBits=nil then
OutOfMemoryError;
end else
begin
FDC := CreateCompatibleDC(0);
FHandle := CreateDIBSection(FDC, FBitmapInfo^, DIB_RGB_COLORS, FPBits, 0, 0);
if FHandle=0 then
raise EOutOfResources.CreateFmt(SCannotMade, ['DIB']);
FOldHandle := SelectObject(FDC, FHandle);
end;
end;
FTopPBits := Pointer(Integer(FPBits)+(FHeight-1)*FWidthBytes);
end;
procedure TDIBSharedImage.Duplicate(Source: TDIBSharedImage; MemoryImage: Boolean);
begin
if Source.FSize=0 then
begin
Create;
FMemoryImage := MemoryImage;
end else
begin
NewImage(Source.FWidth, Source.FHeight, Source.FBitCount,
Source.FPixelFormat, Source.FColorTable, MemoryImage, Source.FCompressed);
if FCompressed then
begin
FBitmapInfo.bmiHeader.biSizeImage := Source.FBitmapInfo.bmiHeader.biSizeImage;
GetMem(FPBits, FBitmapInfo.bmiHeader.biSizeImage);
Move(Source.FPBits^, FPBits^, FBitmapInfo.bmiHeader.biSizeImage);
end else
begin
Move(Source.FPBits^, FPBits^, FBitmapInfo.bmiHeader.biSizeImage);
end;
end;
end;
procedure TDIBSharedImage.Compress(Source: TDIBSharedImage);
procedure EncodeRLE4;
var
Size: Integer;
function AllocByte: PByte;
begin
if Size mod 4096=0 then
ReAllocMem(FPBits, Size+4095);
Result := Pointer(Integer(FPBits)+Size);
Inc(Size);
end;
var
B1, B2, C: Byte;
PB1, PB2: Integer;
Src: PByte;
X, Y: Integer;
function GetPixel(x: Integer): Integer;
begin
if X and 1=0 then
Result := PArrayByte(Src)[X shr 1] shr 4
else
Result := PArrayByte(Src)[X shr 1] and $0F;
end;
begin
Size := 0;
for y:=0 to Source.FHeight-1 do
begin
x := 0;
Src := Pointer(Integer(Source.FPBits)+y*FWidthBytes);
while x3) and (GetPixel(x)=GetPixel(x+2)) then
begin
{ Encoding mode }
B1 := 2;
B2 := (GetPixel(x) shl 4) or GetPixel(x+1);
Inc(x, 2);
C := B2;
while (x5) and ((GetPixel(x)<>GetPixel(x+2)) or (GetPixel(x+1)<>GetPixel(x+3))) and
((GetPixel(x+2)=GetPixel(x+4)) and (GetPixel(x+3)=GetPixel(x+5))) then
begin
{ Encoding mode }
AllocByte^ := 2;
AllocByte^ := (GetPixel(x) shl 4) or GetPixel(x+1);
Inc(x, 2);
end else
begin
if (Source.FWidth-x<4) then
begin
{ Encoding mode }
while Source.FWidth-x>=2 do
begin
AllocByte^ := 2;
AllocByte^ := (GetPixel(x) shl 4) or GetPixel(x+1);
Inc(x, 2);
end;
if Source.FWidth-x=1 then
begin
AllocByte^ := 1;
AllocByte^ := GetPixel(x) shl 4;
Inc(x);
end;
end else
begin
{ Absolute mode }
PB1 := Size; AllocByte;
PB2 := Size; AllocByte;
B1 := 0;
B2 := 4;
AllocByte^ := (GetPixel(x) shl 4) or GetPixel(x+1);
AllocByte^ := (GetPixel(x+2) shl 4) or GetPixel(x+3);
Inc(x, 4);
while (x+13) and (GetPixel(x)=GetPixel(x+2)) and (GetPixel(x+1)=GetPixel(x+3)) then
Break;
AllocByte^ := (GetPixel(x) shl 4) or GetPixel(x+1);
Inc(B2, 2);
Inc(x, 2);
end;
PByte(Integer(FPBits)+PB1)^ := B1;
PByte(Integer(FPBits)+PB2)^ := B2;
end;
end;
if Size and 1=1 then AllocByte;
end;
{ End of line }
AllocByte^ := 0;
AllocByte^ := 0;
end;
{ End of bitmap }
AllocByte^ := 0;
AllocByte^ := 1;
FBitmapInfo.bmiHeader.biSizeImage := Size;
FSize := Size;
end;
procedure EncodeRLE8;
var
Size: Integer;
function AllocByte: PByte;
begin
if Size mod 4096=0 then
ReAllocMem(FPBits, Size+4095);
Result := Pointer(Integer(FPBits)+Size);
Inc(Size);
end;
var
B1, B2: Byte;
PB1, PB2: Integer;
Src: PByte;
X, Y: Integer;
begin
Size := 0;
for y:=0 to Source.FHeight-1 do
begin
x := 0;
Src := Pointer(Integer(Source.FPBits)+y*FWidthBytes);
while x2) and (Src^=PByte(Integer(Src)+1)^) then
begin
{ Encoding mode }
B1 := 2;
B2 := Src^;
Inc(x, 2);
Inc(Src, 2);
while (x2) and (Src^<>PByte(Integer(Src)+1)^) and (PByte(Integer(Src)+1)^=PByte(Integer(Src)+2)^) then
begin
{ Encoding mode }
AllocByte^ := 1;
AllocByte^ := Src^; Inc(Src);
Inc(x);
end else
begin
if (Source.FWidth-x<4) then
begin
{ Encoding mode }
if Source.FWidth-x=2 then
begin
AllocByte^ := 1;
AllocByte^ := Src^; Inc(Src);
AllocByte^ := 1;
AllocByte^ := Src^; Inc(Src);
Inc(x, 2);
end else
begin
AllocByte^ := 1;
AllocByte^ := Src^; Inc(Src);
Inc(x);
end;
end else
begin
{ Absolute mode }
PB1 := Size; AllocByte;
PB2 := Size; AllocByte;
B1 := 0;
B2 := 3;
Inc(x, 3);
AllocByte^ := Src^; Inc(Src);
AllocByte^ := Src^; Inc(Src);
AllocByte^ := Src^; Inc(Src);
while (x3) and (Src^=PByte(Integer(Src)+1)^) and (Src^=PByte(Integer(Src)+2)^) and (Src^=PByte(Integer(Src)+3)^) then
Break;
AllocByte^ := Src^; Inc(Src);
Inc(B2);
Inc(x);
end;
PByte(Integer(FPBits)+PB1)^ := B1;
PByte(Integer(FPBits)+PB2)^ := B2;
end;
end;
if Size and 1=1 then AllocByte;
end;
{ End of line }
AllocByte^ := 0;
AllocByte^ := 0;
end;
{ End of bitmap }
AllocByte^ := 0;
AllocByte^ := 1;
FBitmapInfo.bmiHeader.biSizeImage := Size;
FSize := Size;
end;
begin
if Source.FCompressed then
Duplicate(Source, Source.FMemoryImage)
else begin
NewImage(Source.FWidth, Source.FHeight, Source.FBitCount,
Source.FPixelFormat, Source.FColorTable, True, True);
case FBitmapInfo.bmiHeader.biCompression of
BI_RLE4: EncodeRLE4;
BI_RLE8: EncodeRLE8;
else
Duplicate(Source, Source.FMemoryImage);
end;
end;
end;
procedure TDIBSharedImage.Decompress(Source: TDIBSharedImage; MemoryImage: Boolean);
procedure DecodeRLE4;
var
B1, B2, C: Byte;
Dest, Src, P: PByte;
X, Y, i: Integer;
begin
Src := Source.FPBits;
X := 0;
Y := 0;
while True do
begin
B1 := Src^; Inc(Src);
B2 := Src^; Inc(Src);
if B1=0 then
begin
case B2 of
0: begin { End of line }
X := 0;
Inc(Y);
end;
1: Break; { End of bitmap }
2: begin { Difference of coordinates }
Inc(X, B1);
Inc(Y, B2); Inc(Src, 2);
end;
else
{ Absolute mode }
Dest := Pointer(Longint(FPBits)+Y*FWidthBytes);
C := 0;
for i:=0 to B2-1 do
begin
if i and 1=0 then
begin
C := Src^; Inc(Src);
end else
begin
C := C shl 4;
end;
P := Pointer(Integer(Dest)+X shr 1);
if X and 1=0 then
P^ := (P^ and $0F) or (C and $F0)
else
P^ := (P^ and $F0) or ((C and $F0) shr 4);
Inc(X);
end;
end;
end else
begin
{ Encoding mode }
Dest := Pointer(Longint(FPBits)+Y*FWidthBytes);
for i:=0 to B1-1 do
begin
P := Pointer(Integer(Dest)+X shr 1);
if X and 1=0 then
P^ := (P^ and $0F) or (B2 and $F0)
else
P^ := (P^ and $F0) or ((B2 and $F0) shr 4);
Inc(X);
// Swap nibble
B2 := (B2 shr 4) or (B2 shl 4);
end;
end;
{ Word arrangement }
Inc(Src, Longint(Src) and 1);
end;
end;
procedure DecodeRLE8;
var
B1, B2: Byte;
Dest, Src: PByte;
X, Y: Integer;
begin
Dest := FPBits;
Src := Source.FPBits;
X := 0;
Y := 0;
while True do
begin
B1 := Src^; Inc(Src);
B2 := Src^; Inc(Src);
if B1=0 then
begin
case B2 of
0: begin { End of line }
X := 0; Inc(Y);
Dest := Pointer(Longint(FPBits)+Y*FWidthBytes+X);
end;
1: Break; { End of bitmap }
2: begin { Difference of coordinates }
Inc(X, B1); Inc(Y, B2); Inc(Src, 2);
Dest := Pointer(Longint(FPBits)+Y*FWidthBytes+X);
end;
else
{ Absolute mode }
Move(Src^, Dest^, B2); Inc(Dest, B2); Inc(Src, B2);
end;
end else
begin
{ Encoding mode }
FillChar(Dest^, B1, B2); Inc(Dest, B1);
end;
{ Word arrangement }
Inc(Src, Longint(Src) and 1);
end;
end;
begin
if not Source.FCompressed then
Duplicate(Source, MemoryImage)
else begin
NewImage(Source.FWidth, Source.FHeight, Source.FBitCount,
Source.FPixelFormat, Source.FColorTable, MemoryImage, False);
case Source.FBitmapInfo.bmiHeader.biCompression of
BI_RLE4: DecodeRLE4;
BI_RLE8: DecodeRLE8;
else
Duplicate(Source, MemoryImage);
end;
end;
end;
procedure TDIBSharedImage.ReadData(Stream: TStream; MemoryImage: Boolean);
var
BI: TBitmapInfoHeader;
BC: TBitmapCoreHeader;
BCRGB: array[0..255] of TRGBTriple;
procedure LoadRLE4;
begin
FSize := BI.biSizeImage;
FPBits := GlobalAllocPtr(GMEM_FIXED, FSize);
FBitmapInfo.bmiHeader.biSizeImage := FSize;
Stream.ReadBuffer(FPBits^, FSize);
end;
procedure LoadRLE8;
begin
FSize := BI.biSizeImage;
FPBits := GlobalAllocPtr(GMEM_FIXED, FSize);
FBitmapInfo.bmiHeader.biSizeImage := FSize;
Stream.ReadBuffer(FPBits^, FSize);
end;
procedure LoadRGB;
var
y: Integer;
begin
if BI.biHeight<0 then
begin
for y:=0 to Abs(BI.biHeight)-1 do
Stream.ReadBuffer(Pointer(Integer(FTopPBits)+y*FNextLine)^, FWidthBytes);
end else
begin
Stream.ReadBuffer(FPBits^, FSize);
end;
end;
var
i, PalCount: Integer;
OS2: Boolean;
Localpf: TLocalDIBPixelFormat;
AColorTable: TRGBQuads;
APixelFormat: TDIBPixelFormat;
begin
{ Header size reading }
i := Stream.Read(BI.biSize, 4);
if i=0 then
begin
Create;
Exit;
end;
if i<>4 then
raise EInvalidGraphic.Create(SInvalidDIB);
{ Kind check of DIB }
OS2 := False;
case BI.biSize of
SizeOf(TBitmapCoreHeader):
begin
{ OS/2 type }
Stream.ReadBuffer(Pointer(Integer(@BC)+4)^, SizeOf(TBitmapCoreHeader)-4);
with BI do
begin
biClrUsed := 0;
biCompression := BI_RGB;
biBitCount := BC.bcBitCount;
biHeight := BC.bcHeight;
biWidth := BC.bcWidth;
end;
OS2 := True;
end;
SizeOf(TBitmapInfoHeader):
begin
{ Windows type }
Stream.ReadBuffer(Pointer(Integer(@BI)+4)^, SizeOf(TBitmapInfoHeader)-4);
end;
else
raise EInvalidGraphic.Create(SInvalidDIB);
end;
{ Bit mask reading. }
if BI.biCompression = BI_BITFIELDS then
begin
Stream.ReadBuffer(Localpf, SizeOf(Localpf));
with Localpf do
APixelFormat := MakeDIBPixelFormatMask(RBitMask, GBitMask, BBitMask);
end else
begin
if BI.biBitCount=16 then
APixelFormat := MakeDIBPixelFormat(5, 5, 5)
else if BI.biBitCount=32 then
APixelFormat := MakeDIBPixelFormat(8, 8, 8)
else
APixelFormat := MakeDIBPixelFormat(8, 8, 8);
end;
{ Palette reading }
PalCount := BI.biClrUsed;
if (PalCount=0) and (BI.biBitCount<=8) then
PalCount := 1 shl BI.biBitCount;
if PalCount>256 then PalCount := 256;
FillChar(AColorTable, SizeOf(AColorTable), 0);
if OS2 then
begin
{ OS/2 type }
Stream.ReadBuffer(BCRGB, SizeOf(TRGBTriple)*PalCount);
for i:=0 to PalCount-1 do
begin
with BCRGB[i] do
AColorTable[i] := RGBQuad(rgbtRed, rgbtGreen, rgbtBlue);
end;
end else
begin
{ Windows type }
Stream.ReadBuffer(AColorTable, SizeOf(TRGBQuad)*PalCount);
end;
{ DIB 쐬 }
NewImage(BI.biWidth, Abs(BI.biHeight), BI.biBitCount, APixelFormat, AColorTable,
MemoryImage, BI.biCompression in [BI_RLE4, BI_RLE8]);
{ Pixel data reading }
case BI.biCompression of
BI_RGB : LoadRGB;
BI_RLE4 : LoadRLE4;
BI_RLE8 : LoadRLE8;
BI_BITFIELDS: LoadRGB;
else
raise EInvalidGraphic.Create(SInvalidDIB);
end;
end;
destructor TDIBSharedImage.Destroy;
begin
if FHandle<>0 then
begin
if FOldHandle<>0 then SelectObject(FDC, FOldHandle);
DeleteObject(FHandle);
end else
begin
if FPBits<>nil then
GlobalFreePtr(FPBits);
end;
PaletteManager.DeletePalette(FPalette);
if FDC<>0 then DeleteDC(FDC);
FreeMem(FBitmapInfo);
inherited Destroy;
end;
procedure TDIBSharedImage.FreeHandle;
begin
end;
function TDIBSharedImage.GetPalette: THandle;
begin
if FPaletteCount>0 then
begin
if FChangePalette then
begin
FChangePalette := False;
PaletteManager.DeletePalette(FPalette);
FPalette := PaletteManager.CreatePalette(FColorTable, FPaletteCount);
end;
Result := FPalette;
end else
Result := 0;
end;
procedure TDIBSharedImage.SetColorTable(const Value: TRGBQuads);
begin
FColorTable := Value;
FChangePalette := True;
if (FSize>0) and (FPaletteCount>0) then
begin
SetDIBColorTable(FDC, 0, 256, FColorTable);
Move(FColorTable, Pointer(Integer(FBitmapInfo)+FColorTablePos)^, SizeOf(TRGBQuad)*FPaletteCount);
end;
end;
{ TDIB }
var
FEmptyDIBImage: TDIBSharedImage;
function EmptyDIBImage: TDIBSharedImage;
begin
if FEmptyDIBImage=nil then
begin
FEmptyDIBImage := TDIBSharedImage.Create;
FEmptyDIBImage.Reference;
end;
Result := FEmptyDIBImage;
end;
constructor TDIB.Create;
begin
inherited Create;
SetImage(EmptyDIBImage);
end;
destructor TDIB.Destroy;
begin
SetImage(EmptyDIBImage);
FCanvas.Free;
inherited Destroy;
end;
procedure TDIB.Assign(Source: TPersistent);
procedure AssignBitmap(Source: TBitmap);
var
Data: array[0..1023] of Byte;
BitmapRec: Windows.PBitmap;
DIBSectionRec: PDIBSection;
PaletteEntries: TPaletteEntries;
begin
GetPaletteEntries(Source.Palette, 0, 256, PaletteEntries);
ColorTable := PaletteEntriesToRGBQuads(PaletteEntries);
UpdatePalette;
case GetObject(Source.Handle, SizeOf(Data), @Data) of
SizeOf(Windows.TBitmap):
begin
BitmapRec := @Data;
case BitmapRec^.bmBitsPixel of
16: PixelFormat := MakeDIBPixelFormat(5, 5, 5);
else
PixelFormat := MakeDIBPixelFormat(8, 8, 8);
end;
SetSize(BitmapRec^.bmWidth, BitmapRec^.bmHeight, BitmapRec^.bmBitsPixel);
end;
SizeOf(TDIBSection):
begin
DIBSectionRec := @Data;
if DIBSectionRec^.dsBm.bmBitsPixel>=24 then
begin
PixelFormat := MakeDIBPixelFormat(8, 8, 8);
end else
if DIBSectionRec^.dsBm.bmBitsPixel>8 then
begin
PixelFormat := MakeDIBPixelFormat(DIBSectionRec^.dsBitfields[0],
DIBSectionRec^.dsBitfields[1], DIBSectionRec^.dsBitfields[2]);
end else
begin
PixelFormat := MakeDIBPixelFormat(8, 8, 8);
end;
SetSize(DIBSectionRec^.dsBm.bmWidth, DIBSectionRec^.dsBm.bmHeight,
DIBSectionRec^.dsBm.bmBitsPixel);
end;
else
Exit;
end;
FillChar(PBits^, Size, 0);
Canvas.Draw(0, 0, Source);
end;
procedure AssignGraphic(Source: TGraphic);
begin
if Source is TBitmap then
AssignBitmap(TBitmap(Source))
else
begin
SetSize(Source.Width, Source.Height, 24);
FillChar(PBits^, Size, 0);
Canvas.Draw(0, 0, Source);
end;
end;
begin
if Source=nil then
begin
Clear;
end else if Source is TDIB then
begin
if Source<>Self then
SetImage(TDIB(Source).FImage);
end else if Source is TGraphic then
begin
AssignGraphic(TGraphic(Source));
end else if Source is TPicture then
begin
if TPicture(Source).Graphic<>nil then
AssignGraphic(TPicture(Source).Graphic)
else
Clear;
end else
inherited Assign(Source);
end;
procedure TDIB.Draw(ACanvas: TCanvas; const Rect: TRect);
var
OldPalette: HPalette;
OldMode: Integer;
begin
if Size>0 then
begin
if PaletteCount>0 then
begin
OldPalette := SelectPalette(ACanvas.Handle, Palette, False);
RealizePalette(ACanvas.Handle);
end else
OldPalette := 0;
try
OldMode := SetStretchBltMode(ACanvas.Handle, COLORONCOLOR);
try
GdiFlush;
if FImage.FMemoryImage then
begin
with Rect do
StretchDIBits(ACanvas.Handle, Left, Top, Right - Left, Bottom - Top,
0, 0, Width, Height, FImage.FPBits, FImage.FBitmapInfo^, DIB_RGB_COLORS , ACanvas.CopyMode);
end else
begin
with Rect do
StretchBlt(ACanvas.Handle, Left, Top, Right - Left, Bottom - Top,
FImage.FDC, 0, 0, Width, Height, ACanvas.CopyMode);
end;
finally
SetStretchBltMode(ACanvas.Handle, OldMode);
end;
finally
SelectPalette(ACanvas.Handle, OldPalette, False);
end;
end;
end;
procedure TDIB.Clear;
begin
SetImage(EmptyDIBImage);
end;
procedure TDIB.CanvasChanging(Sender: TObject);
begin
Changing(False);
end;
procedure TDIB.Changing(MemoryImage: Boolean);
var
TempImage: TDIBSharedImage;
begin
if (FImage.RefCount>1) or (FImage.FCompressed) or ((not MemoryImage) and (FImage.FMemoryImage)) then
begin
TempImage := TDIBSharedImage.Create;
try
TempImage.Decompress(FImage, FImage.FMemoryImage and MemoryImage);
except
TempImage.Free;
raise;
end;
SetImage(TempImage);
end;
end;
procedure TDIB.AllocHandle;
var
TempImage: TDIBSharedImage;
begin
if FImage.FMemoryImage then
begin
TempImage := TDIBSharedImage.Create;
try
TempImage.Decompress(FImage, False);
except
TempImage.Free;
raise;
end;
SetImage(TempImage);
end;
end;
procedure TDIB.Compress;
var
TempImage: TDIBSharedImage;
begin
if (not FImage.FCompressed) and (BitCount in [4, 8]) then
begin
TempImage := TDIBSharedImage.Create;
try
TempImage.Compress(FImage);
except
TempImage.Free;
raise;
end;
SetImage(TempImage);
end;
end;
procedure TDIB.Decompress;
var
TempImage: TDIBSharedImage;
begin
if FImage.FCompressed then
begin
TempImage := TDIBSharedImage.Create;
try
TempImage.Decompress(FImage, FImage.FMemoryImage);
except
TempImage.Free;
raise;
end;
SetImage(TempImage);
end;
end;
procedure TDIB.FreeHandle;
var
TempImage: TDIBSharedImage;
begin
if not FImage.FMemoryImage then
begin
TempImage := TDIBSharedImage.Create;
try
TempImage.Duplicate(FImage, True);
except
TempImage.Free;
raise;
end;
SetImage(TempImage);
end;
end;
function TDIB.GetBitmapInfo: PBitmapInfo;
begin
Result := FImage.FBitmapInfo;
end;
function TDIB.GetBitmapInfoSize: Integer;
begin
Result := FImage.FBitmapInfoSize;
end;
function TDIB.GetCanvas: TCanvas;
begin
if (FCanvas=nil) or (FCanvas.Handle=0) then
begin
AllocHandle;
FCanvas := TCanvas.Create;
FCanvas.Handle := FImage.FDC;
FCanvas.OnChanging := CanvasChanging;
end;
Result := FCanvas;
end;
function TDIB.GetEmpty: Boolean;
begin
Result := Size=0;
end;
function TDIB.GetHandle: THandle;
begin
Changing(True);
Result := FImage.FHandle;
end;
function TDIB.GetHeight: Integer;
begin
Result := FHeight;
end;
function TDIB.GetPalette: HPalette;
begin
Result := FImage.GetPalette;
end;
function TDIB.GetPaletteCount: Integer;
begin
Result := FImage.FPaletteCount;
end;
function TDIB.GetPBits: Pointer;
begin
Changing(True);
if not FImage.FMemoryImage then
GDIFlush;
Result := FPBits;
end;
function TDIB.GetPBitsReadOnly: Pointer;
begin
if not FImage.FMemoryImage then
GDIFlush;
Result := FPBits;
end;
function TDIB.GetScanLine(Y: Integer): Pointer;
begin
Changing(True);
if (Y<0) or (Y>=FHeight) then
raise EInvalidGraphicOperation.CreateFmt(SScanline, [Y]);
if not FImage.FMemoryImage then
GDIFlush;
Result := Pointer(Integer(FTopPBits)+Y*FNextLine);
end;
function TDIB.GetScanLineReadOnly(Y: Integer): Pointer;
begin
if (Y<0) or (Y>=FHeight) then
raise EInvalidGraphicOperation.CreateFmt(SScanline, [Y]);
if not FImage.FMemoryImage then
GDIFlush;
Result := Pointer(Integer(FTopPBits)+Y*FNextLine);
end;
function TDIB.GetTopPBits: Pointer;
begin
Changing(True);
if not FImage.FMemoryImage then
GDIFlush;
Result := FTopPBits;
end;
function TDIB.GetTopPBitsReadOnly: Pointer;
begin
if not FImage.FMemoryImage then
GDIFlush;
Result := FTopPBits;
end;
function TDIB.GetWidth: Integer;
begin
Result := FWidth;
end;
const
Mask1: array[0..7] of DWORD = ($80, $40, $20, $10, $08, $04, $02, $01);
Mask1n: array[0..7] of DWORD = ($FFFFFF7F, $FFFFFFBF, $FFFFFFDF, $FFFFFFEF,
$FFFFFFF7, $FFFFFFFB, $FFFFFFFD, $FFFFFFFE);
Mask4: array[0..1] of DWORD = ($F0, $0F);
Mask4n: array[0..1] of DWORD = ($FFFFFF0F, $FFFFFFF0);
Shift1: array[0..7] of DWORD = (7, 6, 5, 4, 3, 2, 1, 0);
Shift4: array[0..1] of DWORD = (4, 0);
function TDIB.GetPixel(X, Y: Integer): DWORD;
begin
Decompress;
Result := 0;
if (X>=0) and (X=0) and (Y=0) and (X=0) and (YSizeOf(TBitmapFileHeader) then
raise EInvalidGraphic.Create(SInvalidDIB);
{ Is the head 'BM'? }
if BF.bfType<>BitmapFileType then
raise EInvalidGraphic.Create(SInvalidDIB);
ReadData(Stream);
end;
procedure TDIB.ReadData(Stream: TStream);
var
TempImage: TDIBSharedImage;
begin
TempImage := TDIBSharedImage.Create;
try
TempImage.ReadData(Stream, FImage.FMemoryImage);
except
TempImage.Free;
raise;
end;
SetImage(TempImage);
end;
procedure TDIB.SaveToClipboardFormat(var AFormat: Word; var AData: THandle;
var APalette: HPALETTE);
var
P: Pointer;
Stream: TMemoryStream;
begin
AFormat := CF_DIB;
APalette := 0;
Stream := TMemoryStream.Create;
try
WriteData(Stream);
AData := GlobalAlloc(GHND, Stream.Size);
if AData=0 then OutOfMemoryError;
P := GlobalLock(AData);
Move(Stream.Memory^, P^, Stream.Size);
GlobalUnLock(AData);
finally
Stream.Free;
end;
end;
procedure TDIB.SaveToStream(Stream: TStream);
var
BF: TBitmapFileHeader;
begin
if Empty then Exit;
with BF do
begin
bfType := BitmapFileType;
bfOffBits := SizeOf(TBitmapFileHeader)+BitmapInfoSize;
bfSize := bfOffBits+FImage.FBitmapInfo^.bmiHeader.biSizeImage;
bfReserved1 := 0;
bfReserved2 := 0;
end;
Stream.WriteBuffer(BF, SizeOf(TBitmapFileHeader));
WriteData(Stream);
end;
procedure TDIB.WriteData(Stream: TStream);
begin
if Empty then Exit;
if not FImage.FMemoryImage then
GDIFlush;
Stream.WriteBuffer(FImage.FBitmapInfo^, FImage.FBitmapInfoSize);
Stream.WriteBuffer(FImage.FPBits^, FImage.FBitmapInfo.bmiHeader.biSizeImage);
end;
procedure TDIB.SetBitCount(Value: Integer);
begin
if Value<=0 then
Clear
else
begin
if Empty then
begin
SetSize(Max(Width, 1), Max(Height, 1), Value)
end else
begin
ConvertBitCount(Value);
end;
end;
end;
procedure TDIB.SetHeight(Value: Integer);
begin
if Value<=0 then
Clear
else
begin
if Empty then
SetSize(Max(Width, 1), Value, 8)
else
SetSize(Width, Value, BitCount);
end;
end;
procedure TDIB.SetWidth(Value: Integer);
begin
if Value<=0 then
Clear
else
begin
if Empty then
SetSize(Value, Max(Height, 1), 8)
else
SetSize(Value, Height, BitCount);
end;
end;
procedure TDIB.SetImage(Value: TDIBSharedImage);
begin
if FImage<>Value then
begin
if FCanvas<>nil then
FCanvas.Handle := 0;
FImage.Release;
FImage := Value;
FImage.Reference;
if FCanvas<>nil then
FCanvas.Handle := FImage.FDC;
ColorTable := FImage.FColorTable;
PixelFormat := FImage.FPixelFormat;
FBitCount := FImage.FBitCount;
FHeight := FImage.FHeight;
FNextLine := FImage.FNextLine;
FNowPixelFormat := FImage.FPixelFormat;
FPBits := FImage.FPBits;
FSize := FImage.FSize;
FTopPBits := FImage.FTopPBits;
FWidth := FImage.FWidth;
FWidthBytes := FImage.FWidthBytes;
end;
end;
procedure TDIB.SetNowPixelFormat(const Value: TDIBPixelFormat);
var
Temp: TDIB;
begin
if CompareMem(@Value, @FImage.FPixelFormat, SizeOf(TDIBPixelFormat)) then exit;
PixelFormat := Value;
Temp := TDIB.Create;
try
Temp.Assign(Self);
SetSize(Width, Height, BitCount);
Canvas.Draw(0, 0, Temp);
finally
Temp.Free;
end;
end;
procedure TDIB.SetPalette(Value: HPalette);
var
PaletteEntries: TPaletteEntries;
begin
GetPaletteEntries(Value, 0, 256, PaletteEntries);
DeleteObject(Value);
ColorTable := PaletteEntriesToRGBQuads(PaletteEntries);
UpdatePalette;
end;
procedure TDIB.SetSize(AWidth, AHeight, ABitCount: Integer);
var
TempImage: TDIBSharedImage;
begin
if (AWidth=Width) and (AHeight=Height) and (ABitCount=BitCount) and
(NowPixelFormat.RBitMask=PixelFormat.RBitMask) and
(NowPixelFormat.GBitMask=PixelFormat.GBitMask) and
(NowPixelFormat.BBitMask=PixelFormat.BBitMask) then Exit;
if (AWidth<=0) or (AHeight<=0) then
begin
Clear;
Exit;
end;
TempImage := TDIBSharedImage.Create;
try
TempImage.NewImage(AWidth, AHeight, ABitCount,
PixelFormat, ColorTable, FImage.FMemoryImage, False);
except
TempImage.Free;
raise;
end;
SetImage(TempImage);
PaletteModified := True;
end;
procedure TDIB.UpdatePalette;
var
Col: TRGBQuads;
begin
if CompareMem(@ColorTable, @FImage.FColorTable, SizeOf(ColorTable)) then Exit;
Col := ColorTable;
Changing(True);
ColorTable := Col;
FImage.SetColorTable(ColorTable);
PaletteModified := True;
end;
procedure TDIB.ConvertBitCount(ABitCount: Integer);
var
Temp: TDIB;
procedure CreateHalftonePalette(R, G, B: Integer);
var
i: Integer;
begin
for i:=0 to 255 do
with ColorTable[i] do
begin
rgbRed := ((i shr (G+B-1)) and (1 shl R-1)) * 255 div (1 shl R-1);
rgbGreen := ((i shr (B-1)) and (1 shl G-1)) * 255 div (1 shl G-1);
rgbBlue := ((i shr 0) and (1 shl B-1)) * 255 div (1 shl B-1);
end;
end;
procedure PaletteToPalette_Inc;
var
x, y: Integer;
i: DWORD;
SrcP, DestP: Pointer;
P: PByte;
begin
i := 0;
for y:=0 to Height-1 do
begin
SrcP := Temp.ScanLine[y];
DestP := ScanLine[y];
for x:=0 to Width-1 do
begin
case Temp.BitCount of
1 : begin
i := (PArrayByte(SrcP)[X shr 3] and Mask1[X and 7]) shr Shift1[X and 7];
end;
4 : begin
i := (PArrayByte(SrcP)[X and 1] and Mask4[X and 1]) shr Shift4[X and 1];
end;
8 : begin
i := PByte(SrcP)^;
Inc(PByte(SrcP));
end;
end;
case BitCount of
1 : begin
P := @PArrayByte(DestP)[X shr 3];
P^ := (P^ and Mask1n[X and 7]) or (i shl Shift1[X shr 3]);
end;
4 : begin
P := @PArrayByte(DestP)[X shr 1];
P^ := (P^ and Mask4n[X and 1]) or (i shl Shift4[X and 1]);
end;
8 : begin
PByte(DestP)^ := i;
Inc(PByte(DestP));
end;
end;
end;
end;
end;
procedure PaletteToRGB_or_RGBToRGB;
var
x, y: Integer;
SrcP, DestP: Pointer;
cR, cG, cB: Byte;
begin
cR := 0;
cG := 0;
cB := 0;
for y:=0 to Height-1 do
begin
SrcP := Temp.ScanLine[y];
DestP := ScanLine[y];
for x:=0 to Width-1 do
begin
case Temp.BitCount of
1 : begin
with Temp.ColorTable[(PArrayByte(SrcP)[X shr 3] and Mask1[X and 7]) shr Shift1[X and 7]] do
begin
cR := rgbRed;
cG := rgbGreen;
cB := rgbBlue;
end;
end;
4 : begin
with Temp.ColorTable[(PArrayByte(SrcP)[X shr 1] and Mask4[X and 1]) shr Shift4[X and 1]] do
begin
cR := rgbRed;
cG := rgbGreen;
cB := rgbBlue;
end;
end;
8 : begin
with Temp.ColorTable[PByte(SrcP)^] do
begin
cR := rgbRed;
cG := rgbGreen;
cB := rgbBlue;
end;
Inc(PByte(SrcP));
end;
16: begin
pfGetRGB(Temp.NowPixelFormat, PWord(SrcP)^, cR, cG, cB);
Inc(PWord(SrcP));
end;
24: begin
with PBGR(SrcP)^ do
begin
cR := R;
cG := G;
cB := B;
end;
Inc(PBGR(SrcP));
end;
32: begin
pfGetRGB(Temp.NowPixelFormat, PDWORD(SrcP)^, cR, cG, cB);
Inc(PDWORD(SrcP));
end;
end;
case BitCount of
16: begin
PWord(DestP)^ := pfRGB(NowPixelFormat, cR, cG, cB);
Inc(PWord(DestP));
end;
24: begin
with PBGR(DestP)^ do
begin
R := cR;
G := cG;
B := cB;
end;
Inc(PBGR(DestP));
end;
32: begin
PDWORD(DestP)^ := pfRGB(NowPixelFormat, cR, cG, cB);
Inc(PDWORD(DestP));
end;
end;
end;
end;
end;
begin
if Size=0 then exit;
Temp := TDIB.Create;
try
Temp.Assign(Self);
SetSize(Temp.Width, Temp.Height, ABitCount);
if FImage=Temp.FImage then Exit;
if (Temp.BitCount<=8) and (BitCount<=8) then
begin
{ The image is converted from the palette color image into the palette color image. }
if Temp.BitCount<=BitCount then
begin
PaletteToPalette_Inc;
end else
begin
case BitCount of
1: begin
ColorTable[0] := RGBQuad(0, 0, 0);
ColorTable[1] := RGBQuad(255, 255, 255);
end;
4: CreateHalftonePalette(1, 2, 1);
8: CreateHalftonePalette(3, 3, 2);
end;
UpdatePalette;
Canvas.Draw(0, 0, Temp);
end;
end else
if (Temp.BitCount<=8) and (BitCount>8) then
begin
{ The image is converted from the palette color image into the rgb color image. }
PaletteToRGB_or_RGBToRGB;
end else
if (Temp.BitCount>8) and (BitCount<=8) then
begin
{ The image is converted from the rgb color image into the palette color image. }
case BitCount of
1: begin
ColorTable[0] := RGBQuad(0, 0, 0);
ColorTable[1] := RGBQuad(255, 255, 255);
end;
4: CreateHalftonePalette(1, 2, 1);
8: CreateHalftonePalette(3, 3, 2);
end;
UpdatePalette;
Canvas.Draw(0, 0, Temp);
end else
if (Temp.BitCount>8) and (BitCount>8) then
begin
{ The image is converted from the rgb color image into the rgb color image. }
PaletteToRGB_or_RGBToRGB;
end;
finally
Temp.Free;
end;
end;
{ Special effect }
procedure TDIB.StartProgress(const Name: string);
begin
FProgressName := Name;
FProgressOld := 0;
FProgressOldTime := GetTickCount;
FProgressY := 0;
FProgressOldY := 0;
Progress(Self, psStarting, 0, False, Rect(0, 0, Width, Height), FProgressName);
end;
procedure TDIB.EndProgress;
begin
Progress(Self, psEnding, 100, True, Rect(0, FProgressOldY, Width, Height), FProgressName);
end;
procedure TDIB.UpdateProgress(PercentY: Integer);
var
Redraw: Boolean;
Percent: DWORD;
begin
Redraw := (GetTickCount-FProgressOldTime>200) and (FProgressY-FProgressOldY>32) and
(((Height div 3>Integer(FProgressY)) and (FProgressOldY=0)) or (FProgressOldY<>0));
Percent := PercentY*100 div Height;
if (Percent<>FProgressOld) or (Redraw) then
begin
Progress(Self, psRunning, Percent, Redraw,
Rect(0, FProgressOldY, Width, FProgressY), FProgressName);
if Redraw then
begin
FProgressOldY := FProgressY;
FProgressOldTime := GetTickCount;
end;
FProgressOld := Percent;
end;
Inc(FProgressY);
end;
procedure TDIB.Blur(ABitCount: Integer; Radius: Integer);
type
TAve = record
cR, cG, cB: DWORD;
c: DWORD;
end;
TArrayAve = array[0..0] of TAve;
var
Temp: TDIB;
procedure AddAverage(Y, XCount: Integer; var Ave: TArrayAve);
var
X: Integer;
SrcP: Pointer;
AveP: ^TAve;
R, G, B: Byte;
begin
case Temp.BitCount of
1 : begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with Temp.ColorTable[(PByte(Integer(SrcP)+X shr 3)^ and Mask1[x and 7]) shr Shift1[x and 7]], AveP^ do
begin
Inc(cR, rgbRed);
Inc(cG, rgbGreen);
Inc(cB, rgbBlue);
Inc(c);
end;
Inc(AveP);
end;
end;
4 : begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with Temp.ColorTable[(PByte(Integer(SrcP)+X shr 1)^ and Mask4[x and 1]) shr Shift4[x and 1]], AveP^ do
begin
Inc(cR, rgbRed);
Inc(cG, rgbGreen);
Inc(cB, rgbBlue);
Inc(c);
end;
Inc(AveP);
end;
end;
8 : begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with Temp.ColorTable[PByte(SrcP)^], AveP^ do
begin
Inc(cR, rgbRed);
Inc(cG, rgbGreen);
Inc(cB, rgbBlue);
Inc(c);
end;
Inc(PByte(SrcP));
Inc(AveP);
end;
end;
16: begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
pfGetRGB(Temp.NowPixelFormat, PWord(SrcP)^, R, G, B);
with AveP^ do
begin
Inc(cR, R);
Inc(cG, G);
Inc(cB, B);
Inc(c);
end;
Inc(PWord(SrcP));
Inc(AveP);
end;
end;
24: begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with PBGR(SrcP)^, AveP^ do
begin
Inc(cR, R);
Inc(cG, G);
Inc(cB, B);
Inc(c);
end;
Inc(PBGR(SrcP));
Inc(AveP);
end;
end;
32: begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
pfGetRGB(Temp.NowPixelFormat, PDWORD(SrcP)^, R, G, B);
with AveP^ do
begin
Inc(cR, R);
Inc(cG, G);
Inc(cB, B);
Inc(c);
end;
Inc(PDWORD(SrcP));
Inc(AveP);
end;
end;
end;
end;
procedure DeleteAverage(Y, XCount: Integer; var Ave: TArrayAve);
var
X: Integer;
SrcP: Pointer;
AveP: ^TAve;
R, G, B: Byte;
begin
case Temp.BitCount of
1 : begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with Temp.ColorTable[(PByte(Integer(SrcP)+X shr 3)^ and Mask1[x and 7]) shr Shift1[x and 7]], AveP^ do
begin
Dec(cR, rgbRed);
Dec(cG, rgbGreen);
Dec(cB, rgbBlue);
Dec(c);
end;
Inc(AveP);
end;
end;
4 : begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with Temp.ColorTable[(PByte(Integer(SrcP)+X shr 1)^ and Mask4[x and 1]) shr Shift4[x and 1]], AveP^ do
begin
Dec(cR, rgbRed);
Dec(cG, rgbGreen);
Dec(cB, rgbBlue);
Dec(c);
end;
Inc(AveP);
end;
end;
8 : begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with Temp.ColorTable[PByte(SrcP)^], AveP^ do
begin
Dec(cR, rgbRed);
Dec(cG, rgbGreen);
Dec(cB, rgbBlue);
Dec(c);
end;
Inc(PByte(SrcP));
Inc(AveP);
end;
end;
16: begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
pfGetRGB(Temp.NowPixelFormat, PWord(SrcP)^, R, G, B);
with AveP^ do
begin
Dec(cR, R);
Dec(cG, G);
Dec(cB, B);
Dec(c);
end;
Inc(PWord(SrcP));
Inc(AveP);
end;
end;
24: begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
with PBGR(SrcP)^, AveP^ do
begin
Dec(cR, R);
Dec(cG, G);
Dec(cB, B);
Dec(c);
end;
Inc(PBGR(SrcP));
Inc(AveP);
end;
end;
32: begin
SrcP := Pointer(Integer(Temp.TopPBits)+Y*Temp.NextLine);
AveP := @Ave;
for x:=0 to XCount-1 do
begin
pfGetRGB(Temp.NowPixelFormat, PDWORD(SrcP)^, R, G, B);
with AveP^ do
begin
Dec(cR, R);
Dec(cG, G);
Dec(cB, B);
Dec(c);
end;
Inc(PDWORD(SrcP));
Inc(AveP);
end;
end;
end;
end;
procedure Blur_Radius_Other;
var
FirstX, LastX, FirstX2, LastX2, FirstY, LastY: Integer;
x, y, x2, y2, jx, jy: Integer;
Ave: TAve;
AveX: ^TArrayAve;
DestP: Pointer;
P: PByte;
begin
GetMem(AveX, Width*SizeOf(TAve));
try
FillChar(AveX^, Width*SizeOf(TAve), 0);
FirstX2 := -1;
LastX2 := -1;
FirstY := -1;
LastY := -1;
x := 0;
for x2:=-Radius to Radius do
begin
jx := x+x2;
if (jx>=0) and (jx=0) and (jy=Height then LastY := Height-1;
AddAverage(LastY, Temp.Width, AveX^);
end;
{ The average is calculated again. }
FirstX := FirstX2;
LastX := LastX2;
FillChar(Ave, SizeOf(Ave), 0);
for x:=FirstX to LastX do
with AveX[x] do
begin
Inc(Ave.cR, cR);
Inc(Ave.cG, cG);
Inc(Ave.cB, cB);
Inc(Ave.c, c);
end;
for x:=0 to Width-1 do
begin
{ The average is updated. }
if x-FirstX=Radius+1 then
begin
with AveX[FirstX] do
begin
Dec(Ave.cR, cR);
Dec(Ave.cG, cG);
Dec(Ave.cB, cB);
Dec(Ave.c, c);
end;
Inc(FirstX);
end;
if LastX-x=Radius-1 then
begin
Inc(LastX); if LastX>=Width then LastX := Width-1;
with AveX[LastX] do
begin
Inc(Ave.cR, cR);
Inc(Ave.cG, cG);
Inc(Ave.cB, cB);
Inc(Ave.c, c);
end;
end;
{ The average is written. }
case BitCount of
1 : begin
P := @PArrayByte(DestP)[X shr 3];
with Ave do
P^ := (P^ and Mask1n[X and 7]) or (DWORD(Ord(((cR+cG+cB) div c) div 3>127)) shl Shift1[X and 7]);
end;
4 : begin
P := @PArrayByte(DestP)[X shr 1];
with Ave do
P^ := (P^ and Mask4n[X and 1]) or (((((cR+cG+cB) div c) div 3) shr 4) shl Shift4[X and 1]);
end;
8 : begin
with Ave do
PByte(DestP)^ := ((cR+cG+cB) div c) div 3;
Inc(PByte(DestP));
end;
16: begin
with Ave do
PWORD(DestP)^ := pfRGB(NowPixelFormat, cR div c, cG div c, cB div c);
Inc(PWORD(DestP));
end;
24: begin
with PBGR(DestP)^, Ave do
begin
R := cR div c;
G := cG div c;
B := cB div c;
end;
Inc(PBGR(DestP));
end;
32: begin
with Ave do
PDWORD(DestP)^ := pfRGB(NowPixelFormat, cR div c, cG div c, cB div c);
Inc(PDWORD(DestP));
end;
end;
end;
UpdateProgress(y);
end;
finally
FreeMem(AveX);
end;
end;
var
i, j: Integer;
begin
if Empty or (Radius=0) then Exit;
Radius := Abs(Radius);
StartProgress('Blur');
try
Temp := TDIB.Create;
try
Temp.Assign(Self);
SetSize(Width, Height, ABitCount);
if ABitCount<=8 then
begin
FillChar(ColorTable, SizeOf(ColorTable), 0);
for i:=0 to (1 shl ABitCount)-1 do
begin
j := i * (1 shl (8-ABitCount));
j := j or (j shr ABitCount);
ColorTable[i] := RGBQuad(j, j, j);
end;
UpdatePalette;
end;
Blur_Radius_Other;
finally
Temp.Free;
end;
finally
EndProgress;
end;
end;
procedure TDIB.Greyscale(ABitCount: Integer);
var
YTblR, YTblG, YTblB: array[0..255] of Byte;
i, j, x, y: Integer;
c: DWORD;
R, G, B: Byte;
Temp: TDIB;
DestP, SrcP: Pointer;
P: PByte;
begin
if Empty then exit;
Temp := TDIB.Create;
try
Temp.Assign(Self);
SetSize(Width, Height, ABitCount);
if ABitCount<=8 then
begin
FillChar(ColorTable, SizeOf(ColorTable), 0);
for i:=0 to (1 shl ABitCount)-1 do
begin
j := i * (1 shl (8-ABitCount));
j := j or (j shr ABitCount);
ColorTable[i] := RGBQuad(j, j, j);
end;
UpdatePalette;
end;
for i:=0 to 255 do
begin
YTblR[i] := Trunc(0.3588*i);
YTblG[i] := Trunc(0.4020*i);
YTblB[i] := Trunc(0.2392*i);
end;
c := 0;
StartProgress('Greyscale');
try
for y:=0 to Height-1 do
begin
DestP := ScanLine[y];
SrcP := Temp.ScanLine[y];
for x:=0 to Width-1 do
begin
case Temp.BitCount of
1 : begin
with Temp.ColorTable[(PArrayByte(SrcP)[X shr 3] and Mask1[X and 7]) shr Shift1[X and 7]] do
c := YTblR[rgbRed]+YTblG[rgbGreen]+YTblB[rgbBlue];
end;
4 : begin
with Temp.ColorTable[(PArrayByte(SrcP)[X shr 1] and Mask4[X and 1]) shr Shift4[X and 1]] do
c := YTblR[rgbRed]+YTblG[rgbGreen]+YTblB[rgbBlue];
end;
8 : begin
with Temp.ColorTable[PByte(SrcP)^] do
c := YTblR[rgbRed]+YTblG[rgbGreen]+YTblB[rgbBlue];
Inc(PByte(SrcP));
end;
16: begin
pfGetRGB(Temp.NowPixelFormat, PWord(SrcP)^, R, G, B);
c := YTblR[R]+YTblR[G]+YTblR[B];
Inc(PWord(SrcP));
end;
24: begin
with PBGR(SrcP)^ do
c := YTblR[R]+YTblG[G]+YTblB[B];
Inc(PBGR(SrcP));
end;
32: begin
pfGetRGB(Temp.NowPixelFormat, PDWORD(SrcP)^, R, G, B);
c := YTblR[R]+YTblR[G]+YTblR[B];
Inc(PDWORD(SrcP));
end;
end;
case BitCount of
1 : begin
P := @PArrayByte(DestP)[X shr 3];
P^ := (P^ and Mask1n[X and 7]) or (DWORD(Ord(c>127)) shl Shift1[X and 7]);
end;
4 : begin
P := @PArrayByte(DestP)[X shr 1];
P^ := (P^ and Mask4n[X and 1]) or ((c shr 4) shl Shift4[X and 1]);
end;
8 : begin
PByte(DestP)^ := c;
Inc(PByte(DestP));
end;
16: begin
PWord(DestP)^ := pfRGB(NowPixelFormat, c, c, c);
Inc(PWord(DestP));
end;
24: begin
with PBGR(DestP)^ do
begin
R := c;
G := c;
B := c;
end;
Inc(PBGR(DestP));
end;
32: begin
PDWORD(DestP)^ := pfRGB(NowPixelFormat, c, c, c);
Inc(PDWORD(DestP));
end;
end;
end;
UpdateProgress(y);
end;
finally
EndProgress;
end;
finally
Temp.Free;
end;
end;
procedure TDIB.Mirror(MirrorX, MirrorY: Boolean);
var
x, y, Width2, c: Integer;
P1, P2, TempBuf: Pointer;
begin
if Empty then exit;
if (not MirrorX) and (not MirrorY) then Exit;
if (not MirrorX) and (MirrorY) then
begin
GetMem(TempBuf, WidthBytes);
try
StartProgress('Mirror');
try
for y:=0 to Height shr 1-1 do
begin
P1 := ScanLine[y];
P2 := ScanLine[Height-y-1];
Move(P1^, TempBuf^, WidthBytes);
Move(P2^, P1^, WidthBytes);
Move(TempBuf^, P2^, WidthBytes);
UpdateProgress(y*2);
end;
finally
EndProgress;
end;
finally
FreeMem(TempBuf, WidthBytes);
end;
end else if (MirrorX) and (not MirrorY) then
begin
Width2 := Width shr 1;
StartProgress('Mirror');
try
for y:=0 to Height-1 do
begin
P1 := ScanLine[y];
case BitCount of
1 : begin
for x:=0 to Width2-1 do
begin
c := Pixels[x, y];
Pixels[x, y] := Pixels[Width-x-1, y];
Pixels[Width-x-1, y] := c;
end;
end;
4 : begin
for x:=0 to Width2-1 do
begin
c := Pixels[x, y];
Pixels[x, y] := Pixels[Width-x-1, y];
Pixels[Width-x-1, y] := c;
end;
end;
8 : begin
P2 := Pointer(Integer(P1)+Width-1);
for x:=0 to Width2-1 do
begin
PByte(@c)^ := PByte(P1)^;
PByte(P1)^ := PByte(P2)^;
PByte(P2)^ := PByte(@c)^;
Inc(PByte(P1));
Dec(PByte(P2));
end;
end;
16: begin
P2 := Pointer(Integer(P1)+(Width-1)*2);
for x:=0 to Width2-1 do
begin
PWord(@c)^ := PWord(P1)^;
PWord(P1)^ := PWord(P2)^;
PWord(P2)^ := PWord(@c)^;
Inc(PWord(P1));
Dec(PWord(P2));
end;
end;
24: begin
P2 := Pointer(Integer(P1)+(Width-1)*3);
for x:=0 to Width2-1 do
begin
PBGR(@c)^ := PBGR(P1)^;
PBGR(P1)^ := PBGR(P2)^;
PBGR(P2)^ := PBGR(@c)^;
Inc(PBGR(P1));
Dec(PBGR(P2));
end;
end;
32: begin
P2 := Pointer(Integer(P1)+(Width-1)*4);
for x:=0 to Width2-1 do
begin
PDWORD(@c)^ := PDWORD(P1)^;
PDWORD(P1)^ := PDWORD(P2)^;
PDWORD(P2)^ := PDWORD(@c)^;
Inc(PDWORD(P1));
Dec(PDWORD(P2));
end;
end;
end;
UpdateProgress(y);
end;
finally
EndProgress;
end;
end else if (MirrorX) and (MirrorY) then
begin
StartProgress('Mirror');
try
for y:=0 to Height shr 1-1 do
begin
P1 := ScanLine[y];
P2 := ScanLine[Height-y-1];
case BitCount of
1 : begin
for x:=0 to Width-1 do
begin
c := Pixels[x, y];
Pixels[x, y] := Pixels[Width-x-1, Height-y-1];
Pixels[Width-x-1, Height-y-1] := c;
end;
end;
4 : begin
for x:=0 to Width-1 do
begin
c := Pixels[x, y];
Pixels[x, y] := Pixels[Width-x-1, Height-y-1];
Pixels[Width-x-1, Height-y-1] := c;
end;
end;
8 : begin
P2 := Pointer(Integer(P2)+Width-1);
for x:=0 to Width-1 do
begin
PByte(@c)^ := PByte(P1)^;
PByte(P1)^ := PByte(P2)^;
PByte(P2)^ := PByte(@c)^;
Inc(PByte(P1));
Dec(PByte(P2));
end;
end;
16: begin
P2 := Pointer(Integer(P2)+(Width-1)*2);
for x:=0 to Width-1 do
begin
PWord(@c)^ := PWord(P1)^;
PWord(P1)^ := PWord(P2)^;
PWord(P2)^ := PWord(@c)^;
Inc(PWord(P1));
Dec(PWord(P2));
end;
end;
24: begin
P2 := Pointer(Integer(P2)+(Width-1)*3);
for x:=0 to Width-1 do
begin
PBGR(@c)^ := PBGR(P1)^;
PBGR(P1)^ := PBGR(P2)^;
PBGR(P2)^ := PBGR(@c)^;
Inc(PBGR(P1));
Dec(PBGR(P2));
end;
end;
32: begin
P2 := Pointer(Integer(P2)+(Width-1)*4);
for x:=0 to Width-1 do
begin
PDWORD(@c)^ := PDWORD(P1)^;
PDWORD(P1)^ := PDWORD(P2)^;
PDWORD(P2)^ := PDWORD(@c)^;
Inc(PDWORD(P1));
Dec(PDWORD(P2));
end;
end;
end;
UpdateProgress(y*2);
end;
finally
EndProgress;
end;
end;
end;
procedure TDIB.Negative;
var
i, i2: Integer;
P: Pointer;
begin
if Empty then exit;
if BitCount<=8 then
begin
for i:=0 to 255 do
with ColorTable[i] do
begin
rgbRed := 255-rgbRed;
rgbGreen := 255-rgbGreen;
rgbBlue := 255-rgbBlue;
end;
UpdatePalette;
end else
begin
P := PBits;
i2 := Size;
asm
mov ecx,i2
mov eax,P
mov edx,ecx
{ Unit of DWORD. }
@@qword_skip:
shr ecx,2
jz @@dword_skip
dec ecx
@@dword_loop:
not dword ptr [eax+ecx*4]
dec ecx
jnl @@dword_loop
mov ecx,edx
shr ecx,2
add eax,ecx*4
{ Unit of Byte. }
@@dword_skip:
mov ecx,edx
and ecx,3
jz @@byte_skip
dec ecx
@@loop_byte:
not byte ptr [eax+ecx]
dec ecx
jnl @@loop_byte
@@byte_skip:
end;
end;
end;
{ TCustomDXDIB }
constructor TCustomDXDIB.Create(AOnwer: TComponent);
begin
inherited Create(AOnwer);
FDIB := TDIB.Create;
end;
destructor TCustomDXDIB.Destroy;
begin
FDIB.Free;
inherited Destroy;
end;
procedure TCustomDXDIB.SetDIB(Value: TDIB);
begin
FDIB.Assign(Value);
end;
{ TCustomDXPaintBox }
constructor TCustomDXPaintBox.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FDIB := TDIB.Create;
ControlStyle := ControlStyle + [csReplicatable];
Height := 105;
Width := 105;
end;
destructor TCustomDXPaintBox.Destroy;
begin
FDIB.Free;
inherited Destroy;
end;
function TCustomDXPaintBox.GetPalette: HPALETTE;
begin
Result := FDIB.Palette;
end;
procedure TCustomDXPaintBox.Paint;
procedure Draw2(Width, Height: Integer);
begin
if (Width<>FDIB.Width) or (Height<>FDIB.Height) then
begin
if FCenter then
begin
inherited Canvas.StretchDraw(Bounds(-(Width-ClientWidth) div 2,
-(Height-ClientHeight) div 2, Width, Height), FDIB);
end else
begin
inherited Canvas.StretchDraw(Bounds(0, 0, Width, Height), FDIB);
end;
end else
begin
if FCenter then
begin
inherited Canvas.Draw(-(Width-ClientWidth) div 2, -(Height-ClientHeight) div 2,
FDIB);
end else
begin
inherited Canvas.Draw(0, 0, FDIB);
end;
end;
end;
var
r, r2: Single;
ViewWidth2, ViewHeight2: Integer;
begin
inherited Paint;
with inherited Canvas do
begin
if (csDesigning in ComponentState) then
begin
Pen.Style := psDash;
Brush.Style := bsClear;
Rectangle(0, 0, Width, Height);
end;
if FDIB.Empty then Exit;
if (FViewWidth>0) or (FViewHeight>0) then
begin
ViewWidth2 := FViewWidth;
if ViewWidth2=0 then ViewWidth2 := FDIB.Width;
ViewHeight2 := FViewHeight;
if ViewHeight2=0 then ViewHeight2 := FDIB.Height;
if FAutoStretch then
begin
if (ClientWidthr2 then
r := r2;
Draw2(Round(r*ClientWidth), Round(r*ClientHeight));
end else
Draw2(ViewWidth2, ViewHeight2);
end else
Draw2(ViewWidth2, ViewHeight2);
end else
begin
if FAutoStretch then
begin
if (FDIB.Width>ClientWidth) or (FDIB.Height>ClientHeight) then
begin
r := ClientWidth/FDIB.Width;
r2 := ClientHeight/FDIB.Height;
if r>r2 then
r := r2;
Draw2(Round(r*FDIB.Width), Round(r*FDIB.Height));
end else
Draw2(FDIB.Width, FDIB.Height);
end else
if FStretch then
begin
if FKeepAspect then
begin
r := ClientWidth/FDIB.Width;
r2 := ClientHeight/FDIB.Height;
if r>r2 then
r := r2;
Draw2(Round(r*FDIB.Width), Round(r*FDIB.Height));
end else
Draw2(ClientWidth, ClientHeight);
end else
Draw2(FDIB.Width, FDIB.Height);
end;
end;
end;
procedure TCustomDXPaintBox.SetAutoStretch(Value: Boolean);
begin
if FAutoStretch<>Value then
begin
FAutoStretch := Value;
Invalidate;
end;
end;
procedure TCustomDXPaintBox.SetCenter(Value: Boolean);
begin
if FCenter<>Value then
begin
FCenter := Value;
Invalidate;
end;
end;
procedure TCustomDXPaintBox.SetDIB(Value: TDIB);
begin
if FDIB<>Value then
begin
FDIB.Assign(Value);
Invalidate;
end;
end;
procedure TCustomDXPaintBox.SetKeepAspect(Value: Boolean);
begin
if Value<>FKeepAspect then
begin
FKeepAspect := Value;
Invalidate;
end;
end;
procedure TCustomDXPaintBox.SetStretch(Value: Boolean);
begin
if Value<>FStretch then
begin
FStretch := Value;
Invalidate;
end;
end;
procedure TCustomDXPaintBox.SetViewWidth(Value: Integer);
begin
if Value<0 then Value := 0;
if Value<>FViewWidth then
begin
FViewWidth := Value;
Invalidate;
end;
end;
procedure TCustomDXPaintBox.SetViewHeight(Value: Integer);
begin
if Value<0 then Value := 0;
if Value<>FViewHeight then
begin
FViewHeight := Value;
Invalidate;
end;
end;
initialization
TPicture.RegisterClipBoardFormat(CF_DIB, TDIB);
TPicture.RegisterFileFormat('dib', 'Device Independent Bitmap', TDIB);
finalization
TPicture.UnRegisterGraphicClass(TDIB);
FEmptyDIBImage.Free;
FPaletteManager.Free;
end.