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bgracanvasgl.pas
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bgracanvasgl.pas
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// SPDX-License-Identifier: LGPL-3.0-linking-exception
{ Canvas that can be used with OpenGL (2D, 3D and lighting shader) }
unit BGRACanvasGL;
{$mode objfpc}{$H+}
interface
uses
BGRAClasses, SysUtils, BGRAGraphics, BGRABitmapTypes,
BGRAOpenGLType, BGRATransform, BGRAPath,
BGRASSE, BGRAMatrix3D;
type
TBGLPath = class;
TBGLCustomCanvas = class;
{ Abstract shader for OpenGL }
TBGLCustomShader = class
protected
procedure StartUse; virtual; abstract;
procedure EndUse; virtual; abstract;
end;
{ Abstract array for OpenGL }
TBGLCustomArray = class
protected
FBuffer: LongWord;
function GetCount: integer; virtual; abstract;
function GetRecordSize: integer; virtual; abstract;
public
constructor Create(ABufferAddress: pointer; ACount: integer; ARecordSize: integer); virtual; abstract;
property Count: integer read GetCount;
property RecordSize: integer read GetRecordSize;
property Handle: LongWord read FBuffer;
end;
{ Attribute variable in shader (value defined per vertex) }
TAttributeVariable = object
protected
FOwner: TObject;
FAttribute: LongWord;
FVectorSize: integer;
FArray: TBGLCustomArray;
FRecordOffset: integer;
FFloat: boolean;
procedure Init(AOwner: TObject; AAttribute: LongWord; AVectorSize: integer;
AFloat: boolean);
public
property Source: TBGLCustomArray read FArray write FArray;
property RecordOffset: integer read FRecordOffset write FRecordOffset;
property Handle: LongWord read FAttribute;
property VectorSize: integer read FVectorSize;
property IsFloat: boolean read FFloat;
property Owner: TObject read FOwner;
end;
{ Abstract array of elements specifed by index for OpenGL }
TBGLCustomElementArray = class
protected
function GetCount: integer; virtual; abstract;
public
constructor Create(const AElements: array of integer); virtual; abstract;
procedure Draw(ACanvas: TBGLCustomCanvas; APrimitive: TOpenGLPrimitive; AAttributes: array of TAttributeVariable); virtual; abstract;
property Count: integer read GetCount;
end;
{ Abstract class for lighting with OpenGL }
TBGLCustomLighting = class
private
FCurrentShader: TBGLCustomShader;
function GetActiveShader: TBGLCustomShader;
procedure SetActiveShader(AValue: TBGLCustomShader);
protected
function GetSupportShaders: boolean; virtual;
function GetShader(AName: string): TBGLCustomShader;
procedure SetShader(AName: string; AValue: TBGLCustomShader);
procedure SetAmbiantLightF(AAmbiantLight: TColorF); virtual; abstract;
function GetAmbiantLightF: TColorF; virtual; abstract;
function GetBuiltInLightingEnabled: boolean; virtual; abstract;
procedure SetBuiltInLightingEnabled(AValue: boolean); virtual; abstract;
public
ShaderList: TStringList;
destructor Destroy; override;
function AddDirectionalLight(AColor: TColorF; ADirection: TPoint3D): integer; virtual; abstract;
function AddPointLight(AColor: TColorF; APosition: TPoint3D; ALinearAttenuation, AQuadraticAttenuation: single): integer; virtual; abstract;
procedure ClearLights; virtual; abstract;
function RemoveLight(AIndex: integer): boolean; virtual; abstract;
procedure SetSpecularIndex(AIndex: integer); virtual; abstract;
function MakeVertexShader(ASource: string): LongWord; virtual; abstract;
function MakeFragmentShader(ASource: string): LongWord; virtual; abstract;
function MakeShaderProgram(AVertexShader, AFragmentShader: LongWord): LongWord; virtual; abstract;
procedure DeleteShaderObject(AShader: LongWord); virtual; abstract;
procedure DeleteShaderProgram(AProgram: LongWord); virtual; abstract;
procedure UseProgram(AProgram: LongWord); virtual; abstract;
function GetUniformVariable(AProgram: LongWord; AName: string): LongWord; virtual; abstract;
function GetAttribVariable(AProgram: LongWord; AName: string): LongWord; virtual; abstract;
procedure SetUniformSingle(AVariable: LongWord; const AValue; AElementCount, AComponentCount: integer); virtual; abstract;
procedure SetUniformInteger(AVariable: LongWord; const AValue; AElementCount, AComponentCount: integer); virtual; abstract;
procedure BindAttribute(AAttribute: TAttributeVariable); virtual; abstract;
procedure UnbindAttribute(AAttribute: TAttributeVariable); virtual; abstract;
procedure FreeShaders;
property ActiveShader: TBGLCustomShader read GetActiveShader write SetActiveShader;
property Shader[AName: string]: TBGLCustomShader read GetShader write SetShader;
property SupportShaders: boolean read GetSupportShaders;
property AmbiantLightF: TColorF read GetAmbiantLightF write SetAmbiantLightF;
property BuiltInLightingEnabled: boolean read GetBuiltInLightingEnabled write SetBuiltInLightingEnabled;
end;
{ Abstract canvas for OpenGL }
TBGLCustomCanvas = class
private
FActiveFrameBuffer: TBGLCustomFrameBuffer;
FHeight: integer;
FWidth: integer;
FNoClip: boolean;
FClipRect: TRect;
protected
procedure SwapRect(var r: TRect); overload;
procedure SwapRect(var x1,y1,x2,y2: single); overload;
procedure InternalArc(cx,cy,rx,ry: single; const StartPoint,EndPoint: TPointF; ABorderColor,AOuterFillColor,ACenterFillColor: TBGRAPixel; AOptions: TArcOptions; ADrawChord: boolean = false); overload;
procedure InternalArc(cx,cy,rx,ry: single; StartAngleRad,EndAngleRad: Single; ABorderColor,AOuterFillColor,ACenterFillColor: TBGRAPixel; AOptions: TArcOptions; ADrawChord: boolean = false); overload;
procedure InternalArcInRect(r: TRect; StartAngleRad,EndAngleRad: Single; ABorderColor,AOuterFillColor,ACenterFillColor: TBGRAPixel; AOptions: TArcOptions; ADrawChord: boolean = false); overload;
function ComputeEllipseC(r: TRect; AHasBorder: boolean; out cx,cy,rx,ry: single): boolean;
function GetHeight: integer; virtual;
function GetWidth: integer; virtual;
procedure SetWidth(AValue: integer); virtual;
procedure SetHeight(AValue: integer); virtual;
function GetClipRect: TRect;
procedure SetClipRect(AValue: TRect);
procedure EnableScissor(AValue: TRect); virtual; abstract;
procedure DisableScissor; virtual; abstract;
function GetMatrix: TAffineMatrix; virtual; abstract;
procedure SetMatrix(const AValue: TAffineMatrix); virtual; abstract;
function GetProjectionMatrix: TMatrix4D; virtual;
procedure SetProjectionMatrix(const {%H-}AValue: TMatrix4D); virtual;
procedure SetBlendMode(AValue: TOpenGLBlendMode); virtual; abstract;
function GetBlendMode: TOpenGLBlendMode; virtual; abstract;
function GetFaceCulling: TFaceCulling; virtual; abstract;
procedure SetFaceCulling(AValue: TFaceCulling); virtual; abstract;
procedure SetActiveFrameBuffer(AValue: TBGLCustomFrameBuffer); virtual;
function GetLighting: TBGLCustomLighting; virtual;
procedure InternalStartPutPixel(const pt: TPointF); virtual; abstract;
procedure InternalStartPolyline(const pt: TPointF); virtual; abstract;
procedure InternalStartPolygon(const pt: TPointF); virtual; abstract;
procedure InternalStartTriangleFan(const pt: TPointF); virtual; abstract;
procedure InternalContinueShape(const pt: TPointF); overload; virtual; abstract;
procedure InternalContinueShape(const {%H-}pt: TPoint3D); overload; virtual;
procedure InternalContinueShape(const {%H-}pt: TPoint3D_128); overload; virtual;
procedure InternalContinueShape(const {%H-}pt, {%H-}normal: TPoint3D_128); overload; virtual;
procedure InternalEndShape; virtual; abstract;
procedure InternalSetColor(const AColor: TBGRAPixel); virtual; abstract;
procedure InternalSetColorF(const AColor: TColorF); virtual; abstract;
procedure InternalStartBlend; virtual; abstract;
procedure InternalEndBlend; virtual; abstract;
procedure InternalStartBlendTriangles; virtual; abstract;
procedure InternalStartBlendQuads; virtual; abstract;
procedure InternalEndBlendTriangles; virtual; abstract;
procedure InternalEndBlendQuads; virtual; abstract;
public
constructor Create;
procedure Fill(AColor: TBGRAPixel); virtual; abstract;
procedure PutPixels(const APoints: array of TPointF; AColor: TBGRAPixel); overload; virtual;
procedure PutPixels(const APoints: array of TPointF; const AColors: array of TBGRAPixel); overload; virtual;
procedure Line(x1,y1,x2,y2: single; AColor: TBGRAPixel; ADrawLastPoint: boolean = true); overload;
procedure Line(p1,p2: TPointF; AColor: TBGRAPixel; ADrawLastPoint: boolean = true); overload;
procedure Polylines(const APoints: array of TPointF; AColor: TBGRAPixel; ADrawLastPoints: boolean = true); virtual;
procedure Polygons(const APoints: array of TPointF; AColor: TBGRAPixel); virtual;
procedure FillPolyConvex(const APoints: array of TPointF; AColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true);
procedure FillTriangleLinearColor(pt1,pt2,pt3: TPointF; c1,c2,c3: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload;
procedure FillTriangles(const APoints: array of TPointF; AColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillTrianglesLinearColor(const APoints: array of TPointF; const AColors: array of TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillTrianglesLinearColor(const APoints: array of TPoint3D; const AColors: array of TBGRAPixel); overload; virtual;
procedure FillTrianglesLinearColor(const APoints: array of TPoint3D_128; const AColors: array of TBGRAPixel); overload; virtual;
procedure FillTrianglesLinearColor(const APoints, ANormals: array of TPoint3D_128; const AColors: array of TBGRAPixel); overload; virtual;
procedure FillTrianglesFan(const APoints: array of TPointF; ACenterColor, ABorderColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillTriangleLinearColor(pt1,pt2,pt3: TPointF; c1,c2,c3: TColorF; APixelCenteredCoordinates: boolean = true); overload;
procedure FillTriangles(const APoints: array of TPointF; AColor: TColorF; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillTrianglesLinearColor(const APoints: array of TPointF; const AColors: array of TColorF; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillTrianglesLinearColor(const APoints: array of TPoint3D; const AColors: array of TColorF); overload; virtual;
procedure FillTrianglesLinearColor(const APoints: array of TPoint3D_128; const AColors: array of TColorF); overload; virtual;
procedure FillTrianglesLinearColor(const APoints, ANormals: array of TPoint3D_128; const AColors: array of TColorF); overload; virtual;
procedure FillTrianglesFan(const APoints: array of TPointF; ACenterColor, ABorderColor: TColorF; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillQuadLinearColor(pt1,pt2,pt3,pt4: TPointF; c1,c2,c3,c4: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload;
procedure FillQuads(const APoints: array of TPointF; AColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillQuadsLinearColor(const APoints: array of TPointF; const AColors: array of TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillQuadsLinearColor(const APoints: array of TPoint3D; const AColors: array of TBGRAPixel); overload; virtual;
procedure FillQuadsLinearColor(const APoints: array of TPoint3D_128; const AColors: array of TBGRAPixel); overload; virtual;
procedure FillQuadsLinearColor(const APoints, ANormals: array of TPoint3D_128; const AColors: array of TBGRAPixel); overload; virtual;
procedure FillQuadLinearColor(pt1,pt2,pt3,pt4: TPointF; c1,c2,c3,c4: TColorF; APixelCenteredCoordinates: boolean = true); overload;
procedure FillQuads(const APoints: array of TPointF; AColor: TColorF; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillQuadsLinearColor(const APoints: array of TPointF; const AColors: array of TColorF; APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure FillQuadsLinearColor(const APoints: array of TPoint3D; const AColors: array of TColorF); overload; virtual;
procedure FillQuadsLinearColor(const APoints: array of TPoint3D_128; const AColors: array of TColorF); overload; virtual;
procedure FillQuadsLinearColor(const APoints, ANormals: array of TPoint3D_128; const AColors: array of TColorF); overload; virtual;
procedure DrawPath(APath: TBGLPath; c: TBGRAPixel);
procedure FillPathConvex(APath: TBGLPath; c: TBGRAPixel; APixelCenteredCoordinates: boolean = true);
procedure FillRectLinearColor(r: TRect; ATopLeftColor, ATopRightColor, ABottomRightColor, ABottomLeftColor: TBGRAPixel); overload; virtual;
procedure FillRectLinearColor(x1,y1,x2,y2: single;
ATopLeftColor, ATopRightColor, ABottomRightColor, ABottomLeftColor: TBGRAPixel;
APixelCenteredCoordinates: boolean = true); overload; virtual;
procedure Ellipse(cx,cy,rx,ry: single; AColor: TBGRAPixel); overload;
procedure EllipseInRect(r: TRect; AColor: TBGRAPixel); overload;
procedure Ellipse(cx,cy,rx,ry: single; AColor: TBGRAPixel; AFillColor: TBGRAPixel); overload;
procedure EllipseInRect(r: TRect; AColor: TBGRAPixel; AFillColor: TBGRAPixel); overload;
procedure EllipseLinearColor(cx,cy,rx,ry: single; AColor: TBGRAPixel; AOuterFillColor, AInnerFillColor: TBGRAPixel); overload;
procedure EllipseLinearColorInRect(r: TRect; AColor: TBGRAPixel; AOuterFillColor, AInnerFillColor: TBGRAPixel); overload;
procedure FillEllipse(cx,cy,rx,ry: single; AColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true);
procedure FillEllipseInRect(r: TRect; AColor: TBGRAPixel);
procedure FillEllipseLinearColor(cx, cy, rx, ry: single; AOuterColor, AInnerColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true);
procedure FillEllipseLinearColorInRect(r: TRect; AOuterColor, AInnerColor: TBGRAPixel);
procedure Arc(cx,cy,rx,ry: single; const StartPoint,EndPoint: TPointF; AColor: TBGRAPixel; ADrawChord: boolean; AFillColor: TBGRAPixel); overload;
procedure Arc(cx,cy,rx,ry: single; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; ADrawChord: boolean; AFillColor: TBGRAPixel); overload;
procedure ArcInRect(r: TRect; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; ADrawChord: boolean; AFillColor: TBGRAPixel);
procedure ArcLinearColor(cx,cy,rx,ry: single; const StartPoint,EndPoint: TPointF; AColor: TBGRAPixel; ADrawChord: boolean; AOuterFillColor, AInnerFillColor: TBGRAPixel); overload;
procedure ArcLinearColor(cx,cy,rx,ry: single; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; ADrawChord: boolean; AOuterFillColor, AInnerFillColor: TBGRAPixel); overload;
procedure ArcLinearColorInRect(r: TRect; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; ADrawChord: boolean; AOuterFillColor, AInnerFillColor: TBGRAPixel);
procedure Pie(cx,cy,rx,ry: single; const StartPoint,EndPoint: TPointF; AColor: TBGRAPixel; AFillColor: TBGRAPixel); overload;
procedure Pie(cx,cy,rx,ry: single; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; AFillColor: TBGRAPixel); overload;
procedure PieInRect(r: TRect; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; AFillColor: TBGRAPixel);
procedure PieLinearColor(cx,cy,rx,ry: single; const StartPoint,EndPoint: TPointF; AColor: TBGRAPixel; AOuterFillColor, AInnerFillColor: TBGRAPixel); overload;
procedure PieLinearColor(cx,cy,rx,ry: single; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; AOuterFillColor, AInnerFillColor: TBGRAPixel); overload;
procedure PieLinearColorInRect(r: TRect; StartAngleRad,EndAngleRad: Single; AColor: TBGRAPixel; AOuterFillColor, AInnerFillColor: TBGRAPixel);
procedure Rectangle(r: TRect; AColor: TBGRAPixel); overload;
procedure Rectangle(r: TRect; AColor: TBGRAPixel; AFillColor: TBGRAPixel); overload;
procedure Rectangle(x1,y1,x2,y2: single; AColor: TBGRAPixel); overload;
procedure Rectangle(x1,y1,x2,y2: single; AColor: TBGRAPixel; AFillColor: TBGRAPixel); overload;
procedure Rectangle(x1,y1,x2,y2: single; AColor: TBGRAPixel; w: single; APixelCenteredCoordinates: boolean = true); overload;
procedure Rectangle(x1,y1,x2,y2: single; AColor: TBGRAPixel; w: single; AFillColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload;
procedure RectangleWithin(x1,y1,x2,y2: single; ABorderColor: TBGRAPixel; w: single; AFillColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload;
procedure RectangleWithin(r: TRect; ABorderColor: TBGRAPixel; w: single; AFillColor: TBGRAPixel); overload;
procedure FillRect(x1,y1,x2,y2: single; AColor: TBGRAPixel; APixelCenteredCoordinates: boolean = true); overload;
procedure FillRect(r: TRect; AColor: TBGRAPixel); overload;
procedure FillRect(r: TRectF; AColor: TBGRAPixel; APixelCenteredCoordinates: boolean = false); overload;
procedure FillRect(r: TRect; AScanner: IBGRAScanner); overload; virtual;
procedure RoundRect(x1,y1,x2,y2,rx,ry: single; ABorderColor: TBGRAPixel; options: TRoundRectangleOptions = []); overload;
procedure RoundRect(x1,y1,x2,y2,rx,ry: single; ABorderColor,AFillColor: TBGRAPixel; options: TRoundRectangleOptions = []); overload;
procedure FillRoundRect(x,y,x2,y2,rx,ry: single; AFillColor: TBGRAPixel; options: TRoundRectangleOptions = []; APixelCenteredCoordinates: boolean = true);
procedure Frame3D(var bounds: TRect; width: integer; Style: TGraphicsBevelCut); overload;
procedure Frame3D(var bounds: TRect; width: integer;
Style: TGraphicsBevelCut; LightColor: TBGRAPixel; ShadowColor: TBGRAPixel); overload;
procedure PutImage(x,y: single; ATexture: IBGLTexture; AAlpha: byte = 255); overload;
procedure PutImage(x,y: single; ATexture: IBGLTexture; AColor: TBGRAPixel); overload;
procedure StretchPutImage(x,y,w,h: single; ATexture: IBGLTexture; AAlpha: byte = 255); overload;
procedure StretchPutImage(x,y,w,h: single; ATexture: IBGLTexture; AColor: TBGRAPixel); overload;
procedure StretchPutImage(r: TRect; ATexture: IBGLTexture; AAlpha: byte = 255); overload;
procedure StretchPutImage(r: TRect; ATexture: IBGLTexture; AColor: TBGRAPixel); overload;
procedure PutImageAngle(x,y: single; ATexture: IBGLTexture; angleDeg: single; AAlpha: byte = 255); overload;
procedure PutImageAngle(x,y: single; ATexture: IBGLTexture; angleDeg: single; AColor: TBGRAPixel); overload;
procedure PutImageAffine(const Origin, HAxis, VAxis: TPointF; ATexture: IBGLTexture; AAlpha: byte = 255); overload;
procedure PutImageAffine(const Origin, HAxis, VAxis: TPointF; ATexture: IBGLTexture; AColor: TBGRAPixel); overload;
procedure PutImageAffine(x,y: single; ATexture: IBGLTexture; const AMatrix: TAffineMatrix; AAlpha: byte = 255); overload;
procedure PutImageAffine(x,y: single; ATexture: IBGLTexture; const AMatrix: TAffineMatrix; AColor: TBGRAPixel); overload;
procedure Translate(x,y: single); virtual;
procedure Scale(sx,sy: single); virtual;
procedure RotateDeg(angleCW: single); virtual;
procedure RotateRad(angleCCW: single); virtual;
procedure ResetTransform; virtual;
procedure UseOrthoProjection; overload; virtual;
procedure UseOrthoProjection(AMinX,AMinY,AMaxX,AMaxY: single); overload; virtual;
procedure StartZBuffer; virtual;
procedure EndZBuffer; virtual;
procedure WaitForGPU({%H-}AOption: TWaitForGPUOption); virtual;
function GetImage({%H-}x,{%H-}y,{%H-}w,{%H-}h: integer): TBGRACustomBitmap; virtual;
function CreateFrameBuffer({%H-}AWidth,{%H-}AHeight: integer): TBGLCustomFrameBuffer; virtual;
procedure NoClip;
property ActiveFrameBuffer: TBGLCustomFrameBuffer read FActiveFrameBuffer write SetActiveFrameBuffer;
property Width: integer read GetWidth write SetWidth;
property Height: integer read GetHeight write SetHeight;
property ClipRect: TRect read GetClipRect write SetClipRect;
property Matrix: TAffineMatrix read GetMatrix write SetMatrix;
property ProjectionMatrix: TMatrix4D read GetProjectionMatrix write SetProjectionMatrix;
property BlendMode: TOpenGLBlendMode read GetBlendMode write SetBlendMode;
property FaceCulling: TFaceCulling read GetFaceCulling write SetFaceCulling;
property Lighting: TBGLCustomLighting read GetLighting;
end;
{ Path with OpenGL rendering }
TBGLPath = class(TBGRAPath)
private
procedure GLDrawProc(const APoints: array of TPointF; AClosed: boolean; AData: pointer);
procedure GLFillProc(const APoints: array of TPointF; AData: pointer);
public
procedure stroke(ACanvas: TBGLCustomCanvas; AColor: TBGRAPixel; AAcceptedDeviation: single = 0.1); overload;
procedure fillConvex(ACanvas: TBGLCustomCanvas; AColor: TBGRAPixel; AAcceptedDeviation: single = 0.1; APixelCenteredCoordinates: boolean = true);
end;
implementation
uses Math, BGRAGradientScanner;
type
TGLStrokeData = record
Color: TBGRAPixel;
Canvas: TBGLCustomCanvas;
end;
TGLFillData = record
Color: TBGRAPixel;
Canvas: TBGLCustomCanvas;
PixelCenteredCoordinates: boolean;
end;
{ TAttributeVariable }
procedure TAttributeVariable.Init(AOwner: TObject; AAttribute: LongWord;
AVectorSize: integer; AFloat: boolean);
begin
FOwner := AOwner;
FAttribute:= AAttribute;
FVectorSize:= AVectorSize;
FFloat := AFloat;
FArray := nil;
FRecordOffset := 0;
end;
{ TBGLCustomLighting }
function TBGLCustomLighting.GetActiveShader: TBGLCustomShader;
begin
result := FCurrentShader;
end;
function TBGLCustomLighting.GetSupportShaders: boolean;
begin
result := false;
end;
function TBGLCustomLighting.GetShader(AName: string): TBGLCustomShader;
var index: integer;
begin
if ShaderList = nil then ShaderList := TStringList.Create;
index := ShaderList.IndexOf(AName);
if index = -1 then
result := nil
else
result := TBGLCustomShader(ShaderList.Objects[index]);
end;
procedure TBGLCustomLighting.SetShader(AName: string; AValue: TBGLCustomShader);
var index: integer;
begin
if ShaderList = nil then ShaderList := TStringList.Create;
index := ShaderList.IndexOf(AName);
if AValue = nil then
begin
if index <> -1 then
ShaderList.Delete(index);
end else
begin
if index = -1 then
ShaderList.AddObject(AName,AValue)
else
ShaderList.Objects[index] := AValue;
end;
end;
destructor TBGLCustomLighting.Destroy;
begin
FreeShaders;
FreeAndNil(ShaderList);
inherited Destroy;
end;
procedure TBGLCustomLighting.FreeShaders;
var i: integer;
begin
if Assigned(ShaderList) then
begin
for i := 0 to ShaderList.Count-1 do
ShaderList.Objects[i].Free;
ShaderList.Clear;
end;
end;
procedure TBGLCustomLighting.SetActiveShader(AValue: TBGLCustomShader);
begin
if AValue <> FCurrentShader then
begin
if Assigned(FCurrentShader) then FCurrentShader.EndUse;
FCurrentShader := AValue;
if Assigned(FCurrentShader) then FCurrentShader.StartUse;
end;
end;
{ TBGLPath }
procedure TBGLPath.GLDrawProc(const APoints: array of TPointF;
AClosed: boolean; AData: pointer);
begin
with TGLStrokeData(AData^) do
if AClosed then
Canvas.Polygons(APoints, Color)
else
Canvas.Polylines(APoints, Color);
end;
procedure TBGLPath.GLFillProc(const APoints: array of TPointF; AData: pointer);
begin
with TGLFillData(AData^) do
Canvas.FillPolyConvex(APoints,Color,PixelCenteredCoordinates);
end;
procedure TBGLPath.stroke(ACanvas: TBGLCustomCanvas; AColor: TBGRAPixel; AAcceptedDeviation: single);
var data: TGLStrokeData;
begin
data.Color := AColor;
data.Canvas := ACanvas;
stroke(@GLDrawProc, AffineMatrixIdentity, AAcceptedDeviation, @data);
end;
procedure TBGLPath.fillConvex(ACanvas: TBGLCustomCanvas; AColor: TBGRAPixel; AAcceptedDeviation: single; APixelCenteredCoordinates: boolean);
var data: TGLFillData;
begin
data.Color := AColor;
data.Canvas := ACanvas;
data.PixelCenteredCoordinates := APixelCenteredCoordinates;
fill(@GLFillProc, AffineMatrixIdentity, AAcceptedDeviation, @data);
end;
{ TBGLCustomCanvas }
function TBGLCustomCanvas.ComputeEllipseC(r: TRect; AHasBorder: boolean; out
cx, cy, rx, ry: single): boolean;
begin
if (r.right = r.left) or (r.bottom = r.top) then
begin
cx := r.left;
cy := r.top;
rx := 0;
ry := 0;
exit(false);
end;
SwapRect(r);
cx := (r.left+r.right-1)*0.5;
cy := (r.top+r.bottom-1)*0.5;
rx := (r.right-r.left)*0.5;
ry := (r.bottom-r.top)*0.5;
if AHasBorder then
begin
DecF(rx, 0.5);
if rx < 0 then rx := 0;
DecF(ry, 0.5);
if ry < 0 then ry := 0;
end;
result := true;
end;
function TBGLCustomCanvas.GetHeight: integer;
begin
if FActiveFrameBuffer = nil then
result := FHeight
else
result := FActiveFrameBuffer.Height;
end;
function TBGLCustomCanvas.GetWidth: integer;
begin
if FActiveFrameBuffer = nil then
result := FWidth
else
result := FActiveFrameBuffer.Width;
end;
procedure TBGLCustomCanvas.SetWidth(AValue: integer);
begin
if FWidth=AValue then Exit;
FWidth:=AValue;
end;
procedure TBGLCustomCanvas.SetHeight(AValue: integer);
begin
if FHeight=AValue then Exit;
FHeight:=AValue;
end;
function TBGLCustomCanvas.GetClipRect: TRect;
begin
if FNoClip then
result := rect(0,0,Width,Height)
else
result := FClipRect;
end;
procedure TBGLCustomCanvas.SetClipRect(AValue: TRect);
begin
SwapRect(AValue);
with ClipRect do
if (AValue.left = left) and (AValue.top = top) and (AValue.bottom = bottom)
and (AValue.right = right) then exit;
if (AValue.Left = 0) and (AValue.Top = 0) and
(AValue.Right = Width) and (AValue.Bottom = Height) then
NoClip
else
begin
FClipRect := AValue;
EnableScissor(FClipRect);
end;
end;
function TBGLCustomCanvas.GetProjectionMatrix: TMatrix4D;
begin
result := MatrixIdentity4D;
end;
procedure TBGLCustomCanvas.SetProjectionMatrix(const AValue: TMatrix4D);
begin
raise exception.Create('Not implemented');
end;
function TBGLCustomCanvas.GetLighting: TBGLCustomLighting;
begin
result := nil;
raise exception.Create('Not implemented');
end;
procedure TBGLCustomCanvas.InternalContinueShape(const pt: TPoint3D);
begin
raise exception.Create('Not available');
end;
procedure TBGLCustomCanvas.InternalContinueShape(const pt: TPoint3D_128);
begin
raise exception.Create('Not available');
end;
procedure TBGLCustomCanvas.InternalContinueShape(const pt, normal: TPoint3D_128);
begin
raise exception.Create('Not available');
end;
procedure TBGLCustomCanvas.NoClip;
begin
FClipRect := rect(0,0,Width,Height);
FNoClip := true;
DisableScissor;
end;
constructor TBGLCustomCanvas.Create;
begin
FNoClip:= true;
end;
procedure TBGLCustomCanvas.FillTriangles(const APoints: array of TPointF;
AColor: TBGRAPixel; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if (length(APoints) < 3) or (AColor.alpha = 0) then exit;
InternalStartBlendTriangles;
InternalSetColor(AColor);
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
InternalContinueShape(APoints[i]+ofs);
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(const APoints: array of TPointF;
const AColors: array of TBGRAPixel; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendTriangles;
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i]+ofs);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(
const APoints: array of TPoint3D; const AColors: array of TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendTriangles;
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(
const APoints: array of TPoint3D_128; const AColors: array of TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendTriangles;
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(const APoints,
ANormals: array of TPoint3D_128; const AColors: array of TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then raise exception.Create('Length of APoints and AColors do not match');
if length(AColors)<>length(ANormals) then raise exception.Create('Length of APoints and ANormals do not match');
InternalStartBlendTriangles;
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i], ANormals[i]);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillQuads(const APoints: array of TPointF;
AColor: TBGRAPixel; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if (length(APoints) < 4) or (AColor.alpha = 0) then exit;
InternalStartBlendQuads;
InternalSetColor(AColor);
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
InternalContinueShape(APoints[i]+ofs);
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(const APoints: array of TPointF;
const AColors: array of TBGRAPixel; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendQuads;
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i]+ofs);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(
const APoints: array of TPoint3D; const AColors: array of TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendQuads;
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(
const APoints: array of TPoint3D_128; const AColors: array of TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendQuads;
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(const APoints,
ANormals: array of TPoint3D_128; const AColors: array of TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then raise exception.Create('Length of APoints and AColors do not match');
if length(AColors)<>length(ANormals) then raise exception.Create('Length of APoints and ANormals do not match');
InternalStartBlendQuads;
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i], ANormals[i]);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadLinearColor(pt1, pt2, pt3, pt4: TPointF; c1,
c2, c3, c4: TColorF; APixelCenteredCoordinates: boolean);
begin
FillQuadsLinearColor([pt1,pt2,pt3,pt4],[c1,c2,c3,c4],APixelCenteredCoordinates);
end;
procedure TBGLCustomCanvas.FillQuads(const APoints: array of TPointF;
AColor: TColorF; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if (length(APoints) < 4) or (AColor[4] = 0) then exit;
InternalStartBlendQuads;
InternalSetColorF(AColor);
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
InternalContinueShape(APoints[i]+ofs);
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(
const APoints: array of TPointF; const AColors: array of TColorF;
APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendQuads;
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i]+ofs);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(
const APoints: array of TPoint3D; const AColors: array of TColorF);
var
i: Int32or64;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendQuads;
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(
const APoints: array of TPoint3D_128; const AColors: array of TColorF);
var
i: Int32or64;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendQuads;
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.FillQuadsLinearColor(const APoints,
ANormals: array of TPoint3D_128; const AColors: array of TColorF);
var
i: Int32or64;
begin
if length(APoints) < 4 then exit;
if length(AColors)<>length(APoints) then raise exception.Create('Length of APoints and AColors do not match');
if length(AColors)<>length(ANormals) then raise exception.Create('Length of APoints and ANormals do not match');
InternalStartBlendQuads;
for i := 0 to length(APoints) - (length(APoints) and 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i], ANormals[i]);
end;
InternalEndBlendQuads;
end;
procedure TBGLCustomCanvas.PutPixels(const APoints: array of TPointF;
AColor: TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) = 0 then exit;
InternalStartBlend;
InternalSetColor(AColor);
InternalStartPutPixel(APoints[0]);
for i := 1 to high(APoints) do
InternalContinueShape(APoints[i]);
InternalEndBlend;
end;
procedure TBGLCustomCanvas.PutPixels(const APoints: array of TPointF;
const AColors: array of TBGRAPixel);
var
i: Int32or64;
begin
if length(APoints) = 0 then exit;
InternalStartBlend;
InternalSetColor(AColors[0]);
InternalStartPutPixel(APoints[0]);
for i := 1 to high(APoints) do
begin
InternalSetColor(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlend;
end;
procedure TBGLCustomCanvas.FillTrianglesFan(const APoints: array of TPointF;
ACenterColor, ABorderColor: TBGRAPixel; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
firstPoint: boolean;
ofs: TPointF;
begin
if (length(APoints) < 3) or ((ACenterColor.alpha = 0) and (ABorderColor.alpha = 0)) then exit;
InternalStartBlend;
firstPoint := true;
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to high(APoints) do
begin
if isEmptyPointF(APoints[i]) then
begin
if not firstPoint then
begin
InternalEndShape;
firstPoint := true;
end;
end else
begin
if firstPoint then
begin
InternalSetColor(ACenterColor);
InternalStartTriangleFan(APoints[i]+ofs);
InternalSetColor(ABorderColor);
firstPoint := false;
end else
InternalContinueShape(APoints[i]+ofs);
end;
end;
if not firstPoint then InternalEndShape;
InternalEndBlend;
end;
procedure TBGLCustomCanvas.FillTriangleLinearColor(pt1, pt2, pt3: TPointF; c1,
c2, c3: TColorF; APixelCenteredCoordinates: boolean);
begin
FillTrianglesLinearColor([pt1,pt2,pt3],[c1,c2,c3],APixelCenteredCoordinates);
end;
procedure TBGLCustomCanvas.FillTriangles(const APoints: array of TPointF;
AColor: TColorF; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if (length(APoints) < 3) or (AColor[4] = 0) then exit;
InternalStartBlendTriangles;
InternalSetColorF(AColor);
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
InternalContinueShape(APoints[i]+ofs);
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(
const APoints: array of TPointF; const AColors: array of TColorF;
APixelCenteredCoordinates: boolean);
var
i: Int32or64;
ofs: TPointF;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendTriangles;
if APixelCenteredCoordinates then ofs := PointF(0.5,0.5) else ofs := PointF(0,0);
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i]+ofs);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(
const APoints: array of TPoint3D; const AColors: array of TColorF);
var
i: Int32or64;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendTriangles;
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(
const APoints: array of TPoint3D_128; const AColors: array of TColorF);
var
i: Int32or64;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then
raise exception.Create('Length of APoints and AColors do not match');
InternalStartBlendTriangles;
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i]);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesLinearColor(const APoints,
ANormals: array of TPoint3D_128; const AColors: array of TColorF);
var
i: Int32or64;
begin
if length(APoints) < 3 then exit;
if length(AColors)<>length(APoints) then raise exception.Create('Length of APoints and AColors do not match');
if length(AColors)<>length(ANormals) then raise exception.Create('Length of APoints and ANormals do not match');
InternalStartBlendTriangles;
for i := 0 to length(APoints) - (length(APoints) mod 3) - 1 do
begin
InternalSetColorF(AColors[i]);
InternalContinueShape(APoints[i], ANormals[i]);
end;
InternalEndBlendTriangles;
end;
procedure TBGLCustomCanvas.FillTrianglesFan(const APoints: array of TPointF;
ACenterColor, ABorderColor: TColorF; APixelCenteredCoordinates: boolean);
var
i: Int32or64;
firstPoint: boolean;
ofs: TPointF;
begin
if (length(APoints) < 3) or ((ACenterColor[4] = 0) and (ABorderColor[4] = 0)) then exit;
InternalStartBlend;