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BitmapPixels.pas
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// -----------------------------------------------------------------------------
// *** BitmapPixels ***
// version 1.1, last update 13.12.2021
// -----------------------------------------------------------------------------
// Module for direct access to pixels at TBitmap
// Tested on Windows(WinApi), Linux(Gtk2, Qt5), OSX(Cocoa)
// -----------------------------------------------------------------------------
//
// Latest verion of this unit aviable here:
// https://github.com/crazzzypeter/BitmapPixels/
//
// GitHub: https://github.com/crazzzypeter/
// Twitch: https://www.twitch.tv/crazzzypeter/
// YouTube: https://www.youtube.com/c/crazzzypeter/
// YouTube?: https://www.youtube.com/channel/UCPQmDZGb5mZJ27ev9-t3bGQ/
// Telegram: @crazzzypeter
//
// -----------------------------------------------------------------------------
// MIT LICENSE
//
// Copyright (c) 2021-2021 CrazzzyPeter
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
// -----------------------------------------------------------------------------
{$REGION 'Examples'}
{
Examples of use:
--- 1 ---
procedure InvertColors(const Bitmap: TBitmap);
var
Data: TBitmapData;
X, Y: Integer;
Pixel: TPixelRec;
begin
Data.Map(Bitmap, TAccessMode.ReadWrite, False);// RGB access
try
for Y := 0 to Data.Height - 1 do
begin
for X := 0 to Data.Width - 1 do
begin
Pixel := Data.GetPixel(X, Y);
Pixel.R := 255 - Pixel.R;
Pixel.G := 255 - Pixel.G;
Pixel.B := 255 - Pixel.B;
Data.SetPixel(X, Y, Pixel);
end;
end;
finally
Data.Unmap();
end;
end;
--- 2 ---
procedure HalfAlpha(const Bitmap: TBitmap);
var
Data: TBitmapData;
X, Y: Integer;
Pixel: TPixelRec;
begin
Data.Map(Bitmap, TAccessMode.ReadWrite, True);// ARGB access
try
for Y := 0 to Data.Height - 1 do
begin
for X := 0 to Data.Width - 1 do
begin
Pixel := Data.GetPixel(X, Y);
Pixel.A := Pixel.A div 2;
Data.SetPixel(X, Y, Pixel);
end;
end;
finally
Data.Unmap();
end;
end;
--- 3 ---
function MakePlasm(): TBitmap;
var
Data: TBitmapData;
X, Y: Integer;
Pixel: TPixelRec;
begin
Result := TBitmap.Create();
Result.SetSize(300, 300);
Data.Map(Result, TAccessMode.Write, False);
try
for Y := 0 to Data.Height - 1 do
begin
for X := 0 to Data.Width - 1 do
begin
Pixel.R := Byte(Trunc(
100 + 100 * (Sin(X * Cos(Y * 0.049) * 0.01) + Cos(X * 0.0123 - Y * 0.09))));
Pixel.G := 0;
Pixel.B := Byte(Trunc(
Pixel.R + 100 * (Sin(X * Cos(X * 0.039) * 0.022) + Sin(X * 0.01 - Y * 0.029))));
Data.SetPixel(X, Y, Pixel);
end;
end;
finally
Data.Unmap();
end;
end;
--- 4 ---
function Mix(const A, B: TBitmap): TBitmap;
function Min(A, B: Integer): Integer;
begin
if A < B then Exit(A) else Exit(B);
end;
var
DataA, DataB, DataResult: TBitmapData;
X, Y: Integer;
PixelA, PixelB, PixelResult: TPixelRec;
begin
Result := TBitmap.Create();
Result.SetSize(Min(A.Width, B.Width), Min(A.Height, B.Height));
// this needed for correct Unmap() on exception
DataA.Init();
DataB.Init();
DataResult.Init();
try
DataA.Map(A, TAccessMode.Read, False);
DataB.Map(B, TAccessMode.Read, False);
DataResult.Map(Result, TAccessMode.Write, False);
for Y := 0 to DataResult.Height - 1 do
begin
for X := 0 to DataResult.Width - 1 do
begin
PixelA := DataA.Pixels[X, Y];
PixelB := DataB.Pixels[X, Y];
PixelResult.R := (PixelA.R + PixelB.R) div 2;
PixelResult.G := (PixelA.G + PixelB.G) div 2;
PixelResult.B := (PixelA.B + PixelB.B) div 2;
DataResult[X, Y] := PixelResult;
end;
end;
finally
DataA.Unmap();
DataB.Unmap();
DataResult.Unmap();
end;
end;
}
{$ENDREGION}
unit BitmapPixels;
{$IFDEF FPC}{$MODE DELPHI}{$ENDIF}
{$SCOPEDENUMS ON}
{$POINTERMATH ON}
interface
uses
{$IFNDEF FPC}Windows,{$ENDIF} Classes, SysUtils, Graphics{$IFDEF FPC}, FPImage{$ENDIF};
type
// $AARRGGBB
TPixel = Cardinal;
PPixel = ^TPixel;
TPixelArray = array [0..High(Integer) div SizeOf(TPixel) - 1] of TPixel;
PPixelArray = ^TPixelArray;
TAccessMode = (Read, Write, ReadWrite);
{ TBitmapData }
TBitmapData = record
private
FData: PPixelArray;
FBitmap: TBitmap;
FWidth: Integer;
FHeight: Integer;
FAccessMode: TAccessMode;
FHasAlpha: Boolean;
FDataArray: array of TPixel;// do not use this
public
procedure Init();
procedure Map(const Bitmap: TBitmap; const Mode: TAccessMode; const UseAlpha: Boolean;
const Background: TColor = clNone);
procedure Unmap();
function GetPixel(X, Y: Integer): TPixel; inline;
procedure SetPixel(X, Y: Integer; AValue: TPixel); inline;
function GetPixelUnsafe(X, Y: Integer): TPixel; inline;
procedure SetPixelUnsafe(X, Y: Integer; AValue: TPixel); inline;
property Data: PPixelArray read FData;
property HasAlpha: Boolean read FHasAlpha;
property Width: Integer read FWidth;
property Height: Integer read FHeight;
property Pixels[X, Y: Integer]: TPixel read GetPixel write SetPixel; default;
end;
{ TPixelRec }
TPixelRec = packed record
constructor Create(const R, G, B: Byte; const A: Byte = 255);
class operator Implicit(Pixel: TPixel): TPixelRec; inline;
class operator Implicit(Pixel: TPixelRec): TPixel; inline;
case Byte of
0: (B, G, R, A: Byte);
1: (Color: TPixel);
end;
TPixelColors = record
{$REGION 'HTML Colors'}
const
AliceBlue = $FFF0F8FF;
AntiqueWhite = $FFFAEBD7;
Aqua = $FF00FFFF;
Aquamarine = $FF7FFFD4;
Azure = $FFF0FFFF;
Beige = $FFF5F5DC;
Bisque = $FFFFE4C4;
Black = $FF000000;
BlanchedAlmond = $FFFFEBCD;
Blue = $FF0000FF;
BlueViolet = $FF8A2BE2;
Brown = $FFA52A2A;
BurlyWood = $FFDEB887;
CadetBlue = $FF5F9EA0;
Chartreuse = $FF7FFF00;
Chocolate = $FFD2691E;
Coral = $FFFF7F50;
CornflowerBlue = $FF6495ED;
Cornsilk = $FFFFF8DC;
Crimson = $FFDC143C;
Cyan = $FF00FFFF;
DarkBlue = $FF00008B;
DarkCyan = $FF008B8B;
DarkGoldenrod = $FFB8860B;
DarkGray = $FFA9A9A9;
DarkGreen = $FF006400;
DarkKhaki = $FFBDB76B;
DarkMagenta = $FF8B008B;
DarkOliveGreen = $FF556B2F;
DarkOrange = $FFFF8C00;
DarkOrchid = $FF9932CC;
DarkRed = $FF8B0000;
DarkSalmon = $FFE9967A;
DarkSeaGreen = $FF8FBC8F;
DarkSlateBlue = $FF483D8B;
DarkSlateGray = $FF2F4F4F;
DarkTurquoise = $FF00CED1;
DarkViolet = $FF9400D3;
DeepPink = $FFFF1493;
DeepSkyBlue = $FF00BFFF;
DimGray = $FF696969;
DodgerBlue = $FF1E90FF;
FireBrick = $FFB22222;
FloralWhite = $FFFFFAF0;
ForestGreen = $FF228B22;
Fuchsia = $FFFF00FF;
Gainsboro = $FFDCDCDC;
GhostWhite = $FFF8F8FF;
Gold = $FFFFD700;
Goldenrod = $FFDAA520;
Gray = $FF808080;
Green = $FF008000;
GreenYellow = $FFADFF2F;
Honeydew = $FFF0FFF0;
HotPink = $FFFF69B4;
IndianRed = $FFCD5C5C;
Indigo = $FF4B0082;
Ivory = $FFFFFFF0;
Khaki = $FFF0E68C;
Lavender = $FFE6E6FA;
LavenderBlush = $FFFFF0F5;
LawnGreen = $FF7CFC00;
LemonChiffon = $FFFFFACD;
LightBlue = $FFADD8E6;
LightCoral = $FFF08080;
LightCyan = $FFE0FFFF;
LightGoldenrodYellow = $FFFAFAD2;
LightGreen = $FF90EE90;
LightGrey = $FFD3D3D3;
LightPink = $FFFFB6C1;
LightSalmon = $FFFFA07A;
LightSeaGreen = $FF20B2AA;
LightSkyBlue = $FF87CEFA;
LightSlateGray = $FF778899;
LightSteelBlue = $FFB0C4DE;
LightYellow = $FFFFFFE0;
Lime = $FF00FF00;
LimeGreen = $FF32CD32;
Linen = $FFFAF0E6;
Magenta = $FFFF00FF;
Maroon = $FF800000;
MediumAquamarine = $FF66CDAA;
MediumBlue = $FF0000CD;
MediumOrchid = $FFBA55D3;
MediumPurple = $FF9370DB;
MediumSeaGreen = $FF3CB371;
MediumSlateBlue = $FF7B68EE;
MediumSpringGreen = $FF00FA9A;
MediumTurquoise = $FF48D1CC;
MediumVioletRed = $FFC71585;
MidnightBlue = $FF191970;
MintCream = $FFF5FFFA;
MistyRose = $FFFFE4E1;
Moccasin = $FFFFE4B5;
NavajoWhite = $FFFFDEAD;
Navy = $FF000080;
OldLace = $FFFDF5E6;
Olive = $FF808000;
OliveDrab = $FF6B8E23;
Orange = $FFFFA500;
OrangeRed = $FFFF4500;
Orchid = $FFDA70D6;
PaleGoldenrod = $FFEEE8AA;
PaleGreen = $FF98FB98;
PaleTurquoise = $FFAFEEEE;
PaleVioletRed = $FFDB7093;
PapayaWhip = $FFFFEFD5;
PeachPuff = $FFFFDAB9;
Peru = $FFCD853F;
Pink = $FFFFC0CB;
Plum = $FFDDA0DD;
PowderBlue = $FFB0E0E6;
Purple = $FF800080;
Red = $FFFF0000;
RosyBrown = $FFBC8F8F;
RoyalBlue = $FF4169E1;
SaddleBrown = $FF8B4513;
Salmon = $FFFA8072;
SandyBrown = $FFF4A460;
SeaGreen = $FF2E8B57;
Seashell = $FFFFF5EE;
Sienna = $FFA0522D;
Silver = $FFC0C0C0;
SkyBlue = $FF87CEEB;
SlateBlue = $FF6A5ACD;
SlateGray = $FF708090;
Snow = $FFFFFAFA;
SpringGreen = $FF00FF7F;
SteelBlue = $FF4682B4;
Tan = $FFD2B48C;
Teal = $FF008080;
Thistle = $FFD8BFD8;
Tomato = $FFFF6347;
Turquoise = $FF40E0D0;
Violet = $FFEE82EE;
Wheat = $FFF5DEB3;
White = $FFFFFFFF;
WhiteSmoke = $FFF5F5F5;
Yellow = $FFFFFF00;
YellowGreen = $FF9ACD32;
{$ENDREGION}
end;
function MakePixel(const R, G, B: Byte; const A: Byte = 255): TPixel; inline;
function PixelGetA(const Pixel: TPixel): Byte; inline;
function PixelGetR(const Pixel: TPixel): Byte; inline;
function PixelGetG(const Pixel: TPixel): Byte; inline;
function PixelGetB(const Pixel: TPixel): Byte; inline;
{$IFDEF FPC}
function FPColorToPixel(const FPColor: TFPColor): TPixel; inline;
function PixelToFPColor(const Pixel: TPixel): TFPColor; inline;
{$ENDIF}
function ColorToPixel(const Color: TColor): TPixel; inline;
function PixelToColor(const Pixel: TPixel): TColor; inline;
implementation
{$IFDEF FPC}
uses
IntfGraphics, GraphType, LCLType, LCLIntf;
{$ENDIF}
function MakePixel(const R, G, B: Byte; const A: Byte): TPixel; inline;
begin
Result := B or (G shl 8) or (R shl 16) or (A shl 24);
end;
function PixelGetA(const Pixel: TPixel): Byte; inline;
begin
Result := (Pixel shr 24) and $FF;
end;
function PixelGetR(const Pixel: TPixel): Byte; inline;
begin
Result := (Pixel shr 16) and $FF;
end;
function PixelGetG(const Pixel: TPixel): Byte; inline;
begin
Result := (Pixel shr 8) and $FF;
end;
function PixelGetB(const Pixel: TPixel): Byte; inline;
begin
Result := Pixel and $FF;
end;
{$IFDEF FPC}
function FPColorToPixel(const FPColor: TFPColor): TPixel; inline;
begin
Result:=
((FPColor.Blue shr 8) and $ff) or
(FPColor.Green and $ff00) or
((FPColor.Red shl 8) and $ff0000) or
((FPColor.Alpha shl 16) and $ff000000);
end;
function PixelToFPColor(const Pixel: TPixel): TFPColor; inline;
begin
Result.Red := (Pixel and $ff0000) shr 8;
Result.Red := Result.Red + (Result.Red shr 8);
Result.Green := (Pixel and $ff00);
Result.Green := Result.Green + (Result.Green shr 8);
Result.Blue := (Pixel and $ff);
Result.Blue := Result.Blue + (Result.Blue shl 8);
Result.Alpha := (Pixel and $ff000000) shr 16;
Result.Alpha := Result.Alpha + (Result.Alpha shr 8);
end;
{$ENDIF}
function ColorToPixel(const Color: TColor): TPixel; inline;
begin
Result:=
(Color and $0000FF00) or
((Color shr 16) and $000000FF) or
((Color shl 16) and $00FF0000) or
$FF000000;
end;
function PixelToColor(const Pixel: TPixel): TColor; inline;
begin
Result:=
(Pixel and $0000FF00) or
((Pixel shr 16) and $000000FF) or
((Pixel shl 16) and $00FF0000);
end;
function SwapRedBlueChanel(const Pixel: TPixel): TPixel; inline;
begin
Result:=
(Pixel and $FF00FF00) or
((Pixel shr 16) and $000000FF) or
((Pixel shl 16) and $00FF0000);
end;
procedure BlendData(var BitmapData: TBitmapData; const Background: TColor);
var
I: Integer;
R, G, B, A: Byte;
DestR, DestG, DestB: Byte;
C: TPixel;
begin
DestR := Background and $FF;
DestG := (Background shr 8) and $FF;
DestB := (Background shr 16) and $FF;
for I := 0 to BitmapData.FWidth * BitmapData.FHeight - 1 do
begin
C := BitmapData.FData[I];
// read
B := C and $FF;
G := (C shr 8) and $FF;
R := (C shr 16) and $FF;
A := (C shr 24) and $FF;
// blend
B := ((B * A) + (DestB * (255 - A))) div 255;
G := ((G * A) + (DestG * (255 - A))) div 255;
R := ((R * A) + (DestR * (255 - A))) div 255;
// write
BitmapData.FData[I] := B or ((G shl 8) and $0000FF00) or ((R shl 16) and $00FF0000);
end;
end;
{$IFDEF FPC}
// FPC ACCESS
procedure ReadData(var BitmapData: TBitmapData);
var
IntfImage: TLazIntfImage;
X, Y, Position: Integer;
begin
IntfImage := BitmapData.FBitmap.CreateIntfImage();
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := FPColorToPixel(IntfImage.Colors[X, Y]);
Inc(Position, 1);
end;
end;
finally
IntfImage.Free();
end;
end;
{function MakeNativeGtk2RawImageDescription(const Width, Height: Integer): TRawImageDescription;
begin
Result.Init;
Result.Format := ricfRGBA;
Result.Width := Width;
Result.Height := Height;
Result.Depth := 32;
Result.BitOrder := riboBitsInOrder;
Result.ByteOrder := riboLSBFirst;
Result.LineOrder := riloTopToBottom;
Result.LineEnd := rileDWordBoundary;
Result.BitsPerPixel := 32;
Result.RedPrec := 8;
Result.RedShift := 0;
Result.GreenPrec := 8;
Result.GreenShift := 8;
Result.BluePrec := 8;
Result.BlueShift := 16;
Result.AlphaPrec := 8;
Result.AlphaShift := 24;
Result.MaskBitsPerPixel := 0;
Result.MaskShift := 0;
Result.MaskLineEnd := rileByteBoundary;
Result.MaskBitOrder := riboBitsInOrder;
Result.PaletteColorCount := 0;
Result.PaletteBitsPerIndex := 0;
Result.PaletteShift := 0;
Result.PaletteLineEnd := rileTight;
Result.PaletteBitOrder := riboBitsInOrder;
Result.PaletteByteOrder := riboLSBFirst;
end;}
{$IF DEFINED(LCLGTK2) OR DEFINED(WINDOWS)}
procedure WriteData(var BitmapData: TBitmapData);
var
Position: Integer;
RawImage: TRawImage;
begin
if BitmapData.FHasAlpha then
begin
RawImage.Init();
RawImage.Description.Init_BPP32_B8G8R8A8_BIO_TTB(BitmapData.FWidth, BitmapData.FHeight);
RawImage.Data := PByte(@(BitmapData.FData[0]));
RawImage.DataSize := BitmapData.FWidth * BitmapData.FHeight * SizeOf(TPixel);
BitmapData.FBitmap.LoadFromRawImage(RawImage, False);
end else
begin
RawImage.Init();
RawImage.Description.Init_BPP32_B8G8R8_BIO_TTB(BitmapData.FWidth, BitmapData.FHeight);
RawImage.DataSize := BitmapData.FWidth * BitmapData.FHeight * SizeOf(TPixel);
RawImage.CreateData(False);
try
for Position := 0 to BitmapData.FWidth * BitmapData.FHeight - 1 do
begin
PPixel(RawImage.Data)[Position] := BitmapData.Data[Position] and $00FFFFFF;
end;
BitmapData.FBitmap.LoadFromRawImage(RawImage, False);
finally
RawImage.FreeData();
end;
end;
end;
{$ELSE}
procedure WriteData(var BitmapData: TBitmapData);
var
IntfImage: TLazIntfImage;
X, Y, Position: Integer;
//RawImage: TRawImage;
begin
if BitmapData.FHasAlpha then
IntfImage := TLazIntfImage.Create(BitmapData.FWidth, BitmapData.FHeight, [riqfRGB, riqfAlpha])
else
IntfImage := TLazIntfImage.Create(BitmapData.FWidth, BitmapData.FHeight, [riqfRGB]);
try
IntfImage.CreateData();
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
for X := 0 to BitmapData.FWidth - 1 do
begin
IntfImage.Colors[X, Y] := PixelToFPColor(BitmapData.FData[Position]);
Inc(Position, 1);
end;
end;
BitmapData.FBitmap.LoadFromIntfImage(IntfImage);
// IntfImage.GetRawImage(RawImage, True);
// BitmapData.FBitmap.LoadFromRawImage(RawImage, True);
finally
IntfImage.Free();
end;
end;
{$ENDIF}
procedure ReadDataRGB(var BitmapData: TBitmapData);
var
pSrc: PByte;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
pSrc := PByte(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := (pSrc[0] shl 16) or (pSrc[1] shl 8) or pSrc[2];
Inc(Position, 1);
Inc(pSrc, 3);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataRGBOpaque(var BitmapData: TBitmapData);
var
pSrc: PByte;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
pSrc := PByte(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := (pSrc[0] shl 16) or (pSrc[1] shl 8) or pSrc[2] or $FF000000;
Inc(Position, 1);
Inc(pSrc, 3);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataBGR(var BitmapData: TBitmapData);
var
pSrc: PByte;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
pSrc := PByte(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := pSrc[0] or (pSrc[1] shl 8) or (pSrc[2] shl 16);
Inc(Position, 1);
Inc(pSrc, 3);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataBGROpaque(var BitmapData: TBitmapData);
var
pSrc: PByte;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
pSrc := PByte(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := pSrc[0] or (pSrc[1] shl 8) or (pSrc[2] shl 16) or $FF000000;
Inc(Position, 1);
Inc(pSrc, 3);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataBGRA(var BitmapData: TBitmapData);// fast
var
Y: Integer;
pSrc, pDst: PPixel;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
for Y := 0 to BitmapData.FHeight - 1 do
begin
pSrc := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
pDst := @(BitmapData.FData[BitmapData.FWidth * Y]);
Move(pSrc^, pDst^, BitmapData.FWidth * SizeOf(TPixel));
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataBGRN(var BitmapData: TBitmapData);
var
Scanline: PPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := Scanline[X];
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataBGRNOpaque(var BitmapData: TBitmapData);
var
Scanline: PPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := Scanline[X] or $FF000000;
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataRGBA(var BitmapData: TBitmapData);
var
Scanline: PPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
BitmapData.FData[Position] := SwapRedBlueChanel(Scanline[X]);
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataRGBN(var BitmapData: TBitmapData);
var
Scanline: PPixel;
Pixel: TPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
Pixel := Scanline[X];
BitmapData.FData[Position] :=
((Pixel shr 16) and $000000FF) or
(Pixel and $0000FF00) or
((Pixel shl 16) and $00FF0000);
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure ReadDataRGBNOpaque(var BitmapData: TBitmapData);
var
Scanline: PPixel;
Pixel: TPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
Pixel := Scanline[X];
BitmapData.FData[Position] :=
((Pixel shr 16) and $000000FF) or
(Pixel and $0000FF00) or
((Pixel shl 16) and $00FF0000) or
$FF000000;
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure WriteDataRGB(var BitmapData: TBitmapData);
var
pSrc: PByte;
C: TPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
pSrc := PByte(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
C := BitmapData.FData[Position];
pSrc[0] := (C shr 16) and $FF;
pSrc[1] := (C shr 8) and $FF;
pSrc[2] := C and $FF;
Inc(Position, 1);
Inc(pSrc, 3);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure WriteDataBGR(var BitmapData: TBitmapData);
var
pSrc: PByte;
C: TPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
pSrc := PByte(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
C := BitmapData.FData[Position];
pSrc[0] := C and $FF;
pSrc[1] := (C shr 8) and $FF;
pSrc[2] := (C shr 16) and $FF;
Inc(Position, 1);
Inc(pSrc, 3);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure WriteDataBGRA(var BitmapData: TBitmapData);// fast
var
Y: Integer;
pSrc, pDst: PPixel;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
for Y := 0 to BitmapData.FHeight - 1 do
begin
pDst := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
pSrc := @(BitmapData.FData[BitmapData.FWidth * Y]);
Move(pSrc^, pDst^, BitmapData.FWidth * SizeOf(TPixel));
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure WriteDataRGBA(var BitmapData: TBitmapData);
var
Scanline: PPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
Scanline[X] := SwapRedBlueChanel(BitmapData.FData[Position]);
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure WriteDataRGBN(var BitmapData: TBitmapData);
var
Scanline: PPixel;
Pixel: TPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
Pixel := BitmapData.FData[Position];
Scanline[X] :=
((Pixel shr 16) and $000000FF) or
(Pixel and $0000FF00) or
((Pixel shl 16) and $00FF0000);
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
procedure WriteDataBGRN(var BitmapData: TBitmapData);
var
Scanline: PPixel;
X, Y, Position: Integer;
begin
BitmapData.FBitmap.BeginUpdate(False);
try
Position := 0;
for Y := 0 to BitmapData.FHeight - 1 do
begin
Scanline := PPixel(BitmapData.FBitmap.RawImage.GetLineStart(Y));
for X := 0 to BitmapData.FWidth - 1 do
begin
Scanline[X] := BitmapData.FData[Position] and $00FFFFFF;
Inc(Position, 1);
end;
end;
finally
BitmapData.FBitmap.EndUpdate(False);
end;
end;
type
TDescriptionType = (DeskBGR, DeskRGB, DeskBGRA, DeskRGBA, DeskBGRN, DeskRGBN, DeskOther);
function CalcDescriptionType(const Description: TRawImageDescription; const IsReadOnly: Boolean = False): TDescriptionType;
begin
Result := TDescriptionType.DeskOther;
if Description.Format <> ricfRGBA then Exit;
if Description.ByteOrder <> riboLSBFirst then Exit;
if Description.PaletteColorCount <> 0 then Exit;
// if Description.BitOrder <> riboBitsInOrder then Exit; // it doesn't matter without a mask
// ??? I think it makes no difference to us whether there is a mask or not
{$IFDEF LCLGTK2}
// LCLGTK2 image width workaround
// ex: width = 16 - ok, width = 15 bug
if (not IsReadOnly) and (Description.MaskBitsPerPixel <> 0) then
if Description.MaskLineEnd = rileByteBoundary then Exit;
{$ENDIF}
if Description.BitsPerPixel = 32 then
begin
if Description.Depth = 32 then