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DIB2.pas
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DIB2.pas
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unit DIB;
interface
{ $INCLUDE DelphiXcfg.inc}
{$DEFINE USE_SCANLINE}
uses
Windows, SysUtils, Classes, Graphics, Controls, Math;
type
TColorLineStyle = (csSolid, csGradient, csRainbow);
TColorLinePixelGeometry = (pgPoint, pgCircular, pgRectangular);
TRGBQuads = array[0..255] of TRGBQuad;
TPaletteEntries = array[0..255] of TPaletteEntry;
PBGR = ^TBGR;
TBGR = packed record
B, G, R: Byte;
end;
{ Added this type for New SPecial Effect }
TFilter = array[0..2, 0..2] of SmallInt;
TLines = array[0..0] of TBGR;
PLines = ^TLines;
TBytes = array[0..0] of Byte;
PBytes = ^TBytes;
TPBytes = array[0..0] of PBytes;
PPBytes = ^TPBytes;
{ End of type's }
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;
TFilterTypeResample = (ftrBox, ftrTriangle, ftrHermite, ftrBell, ftrBSpline,
ftrLanczos3, ftrMitchell);
TDistortType = (dtFast, dtSlow);
{DXFusion effect type}
TFilterMode = (fmNormal, fmMix50, fmMix25, fmMix75);
TLightSource = record
X, Y: Integer;
Size1, Size2: Integer;
Color: TColor;
end;
TLightArray = array{$IFDEF DelphiX_Delphi3} [0..0]{$ENDIF} of TLightsource;
TMatrixSetting = array[0..9] of Integer;
{--}
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;
FLUTDist: array[0..255, 0..255] of Integer;
LG_COUNT: Integer;
LG_DETAIL: 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);
{ Added these 3 functions for New Specials Effects }
function Interval(iMin, iMax, iValue: Integer; iMark: boolean): Integer;
function IntToByte(i: Integer): Byte;
function TrimInt(i, Min, Max: Integer): Integer;
{ End of 3 functions for New Special Effect }
procedure DoSmoothRotate(Src: TDIB; cx, cy: Integer; Angle: Extended);
procedure Darkness(Amount: integer);
function GetAlphaChannel: TDIB;
procedure SetAlphaChannel(const Value: TDIB);
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;
function HasAlphaChannel: Boolean;
function AssignAlphaChannel(DIB: TDIB): Boolean;
procedure RetAlphaChannel(out DIB: TDIB);
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;
{ Added New Special Effect }
procedure Spray(Amount: integer);
procedure Emboss;
procedure AddMonoNoise(Amount: integer);
procedure AddGradiantNoise(Amount: byte);
function Twist(bmp: TDIB; Amount: byte): boolean;
function FishEye(bmp: TDIB): boolean;
function SmoothRotateWrap(Bmp: TDIB; cx, cy: Integer; Degree: Extended): boolean;
procedure Lightness(Amount: integer);
procedure Saturation(Amount: integer);
procedure Contrast(Amount: integer);
procedure AddRGB(ra, ga, ba: byte);
function Filter(Dest: TDIB; Filter: TFilter): boolean;
procedure Sharpen(Amount: Integer);
function IntToColor(i: Integer): TBGR;
function Rotate(Dst: TDIB; cx, cy: Integer; Angle: Double): boolean;
procedure SplitBlur(Amount: Integer);
procedure GaussianBlur(Bmp: TDIB; Amount: Integer);
{ End of New Special Effect }
{
New effect for TDIB
with Some Effects like AntiAlias, Contrast,
Lightness, Saturation, GaussianBlur, Mosaic,
Twist, Splitlight, Trace, Emboss, etc.
Works with 24bit color DIBs.
This component is based on TProEffectImage component version 1.0 by
Written By Babak Sateli ([email protected], http://raveland.netfirms.com)
and modified by (c) 2004 Jaro Benes
for DelphiX use.
Demo was modifies into DXForm with function like original
DISCLAIMER
This component is provided AS-IS without any warranty of any kind, either express or
implied. This component is freeware and can be used in any software product.
}
procedure DoInvert;
procedure DoAddColorNoise(Amount: Integer);
procedure DoAddMonoNoise(Amount: Integer);
procedure DoAntiAlias;
procedure DoContrast(Amount: Integer);
procedure DoFishEye(Amount: Integer);
procedure DoGrayScale;
procedure DoLightness(Amount: Integer);
procedure DoDarkness(Amount: Integer);
procedure DoSaturation(Amount: Integer);
procedure DoSplitBlur(Amount: Integer);
procedure DoGaussianBlur(Amount: Integer);
procedure DoMosaic(Size: Integer);
procedure DoTwist(Amount: Integer);
procedure DoSplitlight(Amount: integer);
procedure DoTile(Amount: integer);
procedure DoSpotLight(Amount: integer; Spot: TRect);
procedure DoTrace(Amount: integer);
procedure DoEmboss;
procedure DoSolorize(Amount: integer);
procedure DoPosterize(Amount: integer);
procedure DoBrightness(Amount: integer);
procedure DoResample(AmountX, AmountY: integer; TypeResample: TFilterTypeResample);
procedure DoColorize(ForeColor, BackColor: TColor);
{ Standalone DXFusion }
{--- c o n F u s i o n ---}
{By Joakim Back, www.back.mine.nu}
{Huge thanks to Ilkka Tuomioja for helping out with the project.}
procedure CreateDIBFromBitmap(const Bitmap: TBitmap);
{Drawing Methods.}
procedure DrawOn(SrcCanvas: TCanvas; Dest: TRect; DestCanvas: TCanvas;
Xsrc, Ysrc: Integer);
procedure DrawTo(SrcDIB: TDIB; X, Y, Width, Height, SourceX,
SourceY: Integer);
procedure DrawTransparent(SrcDIB: TDIB; const X, Y, Width, Height,
SourceX, SourceY: Integer; const Color: TColor);
procedure DrawShadow(SrcDIB: TDIB; X, Y, Width, Height, Frame: Integer;
FilterMode: TFilterMode);
procedure DrawDarken(SrcDIB: TDIB; X, Y, Width, Height,
Frame: Integer);
procedure DrawAdditive(SrcDIB: TDIB; X, Y, Width, Height, Alpha,
Frame: Integer);
procedure DrawQuickAlpha(SrcDIB: TDIB; const X, Y, Width, Height,
SourceX, SourceY: Integer; const Color: TColor;
FilterMode: TFilterMode);
procedure DrawTranslucent(SrcDIB: TDIB; const X, Y, Width, Height,
SourceX, SourceY: Integer; const Color: TColor);
procedure DrawMorphed(SrcDIB: TDIB; const X, Y, Width, Height, SourceX,
SourceY: Integer; const Color: TColor);
procedure DrawAlpha(SrcDIB: TDIB; const X, Y, Width, Height, SourceX,
SourceY, Alpha: Integer; const Color: TColor);
procedure DrawAlphaMask(SrcDIB, MaskDIB: TDIB; const X, Y, Width,
Height, SourceX, SourceY: Integer);
procedure DrawAntialias(SrcDIB: TDIB);
procedure Draw3x3Matrix(SrcDIB: TDIB; Setting: TMatrixSetting);
procedure DrawMono(SrcDIB: TDIB; const X, Y, Width, Height, SourceX,
SourceY: integer; const TransColor, ForeColor, BackColor: TColor);
{One-color Filters.}
procedure FilterLine(X1, Y1, X2, Y2: Integer; Color: TColor;
FilterMode: TFilterMode);
procedure FilterRect(X, Y, Width, Height: Integer; Color: TColor;
FilterMode: TFilterMode);
{ Lightsource. }
procedure InitLight(Count, Detail: Integer);
procedure DrawLights(FLight: TLightArray; AmbientLight: TColor);
//
// effect for special purpose
//
procedure FadeOut(DIB2: TDIB; Step: Byte);
procedure DoZoom(DIB2: TDIB; ZoomRatio: Real);
procedure DoBlur(DIB2: TDIB);
procedure FadeIn(DIB2: TDIB; Step: Byte);
procedure FillDIB8(Color: Byte);
procedure DoRotate(DIB1: TDIB; xc, yc, a: Integer);
procedure Distort(DIB1: TDIB; dt: TDistortType; xc, yc, b: Integer; factor: Real);
function Ink(DIB: TDIB; const SprayInit: Boolean; const AmountSpray: Integer): Boolean;
// lines
procedure AntialiasedLine(x1, y1, x2, y2: integer; color: TColor);
function GetColorBetween(StartColor, EndColor: TColor; Pointvalue,
FromPoint, ToPoint: Extended): TColor;
procedure ColoredLine(const iStart, iEnd: TPoint; iColorStyle: TColorLineStyle;
iGradientFrom, iGradientTo: TColor; iPixelGeometry: TColorLinePixelGeometry;
iRadius: WORD);
// standard property
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;
property AlphaChannel: TDIB read GetAlphaChannel write SetAlphaChannel;
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;
{$IFDEF DelphiX_Spt9}property OnMouseWheel; {$ENDIF}
{$IFDEF DelphiX_Spt9}property OnResize; {$ENDIF}
{$IFDEF DelphiX_Spt9}property OnCanResize; {$ENDIF}
{$IFDEF DelphiX_Spt9}property OnContextPopup; {$ENDIF}
property OnStartDrag;
end;
const
DefaultFilterRadius: array[TFilterTypeResample] of Single = (0.5, 1, 1, 1.5, 2, 3, 2);
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;
function PosValue(Value: Integer): Integer;
type
TOC = 0..511;
function DSin(const C: TOC): Single; {$IFDEF VER9UP}inline; {$ENDIF}
function DCos(const C: TOC): Single; {$IFDEF VER9UP}inline; {$ENDIF}
{ Added Constants for TFilter Type }
const
EdgeFilter: TFilter = ((-1, -1, -1), (-1, 8, -1), (-1, -1, -1));
StrongOutlineFilter: TFilter = ((-100, 0, 0), (0, 0, 0), (0, 0, 100));
Enhance3DFilter: TFilter = ((-100, 5, 5), (5, 5, 5), (5, 5, 100));
LinearFilter: TFilter = ((-40, -40, -40), (-40, 255, -40), (-40, -40, -40));
GranularFilter: TFilter = ((-20, 5, 20), (5, -10, 5), (100, 5, -100));
SharpFilter: TFilter = ((-2, -2, -2), (-2, 20, -2), (-2, -2, -2));
{ End of constants }
{ Added Constants for DXFusion Type }
const
{ 3x3 Matrix Presets. }
msEmboss: TMatrixSetting = (-1, -1, 0, -1, 6, 1, 0, 1, 1, 6);
msHardEmboss: TMatrixSetting = (-4, -2, -1, -2, 10, 2, -1, 2, 4, 8);
msBlur: TMatrixSetting = (1, 2, 1, 2, 4, 2, 1, 2, 1, 16);
msSharpen: TMatrixSetting = (-1, -1, -1, -1, 15, -1, -1, -1, -1, 7);
msEdgeDetect: TMatrixSetting = (-1, -1, -1, -1, 8, -1, -1, -1, -1, 1);
implementation
uses DXConsts;
{$IFDEF DelphiX_Delphi3}
function Max(B1, B2: Integer): Integer;
begin
if B1 >= B2 then Result := B1 else Result := B2;
end;
function Min(B1, B2: Integer): Integer;
begin
if B1 <= B2 then Result := B1 else Result := B2;
end;
{$ENDIF}
function DSin(const C: TOC): Single; {$IFDEF VER9UP}inline; {$ENDIF}
begin
Result := sin(((c * 360) / 511) * Pi / 180);
end;
function DCos(const C: TOC): Single; {$IFDEF VER9UP}inline; {$ENDIF}
begin
Result := cos(((c * 360) / 511) * Pi / 180);
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 RBitCount2);
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 GBitCount2);
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 BBitCount2);
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 x < Source.FWidth do
begin
if (Source.FWidth - x > 3) and (GetPixel(x) = GetPixel(x + 2)) then
begin
{ Encoding mode }
B1 := 2;
B2 := (GetPixel(x) shl 4) or GetPixel(x + 1);