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bgragradients.pas
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bgragradients.pas
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{ ***************************************************************************
* *
* This file is part of BGRABitmap library which is distributed under the *
* modified LGPL. *
* *
* See the file COPYING.modifiedLGPL.txt, included in this distribution, *
* for details about the copyright. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* *
************************* BGRABitmap library ******************************
- Drawing routines with transparency and antialiasing with Lazarus.
Offers also various transforms.
- These routines allow to manipulate 32bit images in BGRA format or RGBA
format (depending on the platform).
- This code is under modified LGPL (see COPYING.modifiedLGPL.txt).
This means that you can link this library inside your programs for any purpose.
Only the included part of the code must remain LGPL.
- If you make some improvements to this library, please notify here:
http://www.lazarus.freepascal.org/index.php/topic,12037.0.html
********************* Contact : Circular at operamail.com *******************
******************************* CONTRIBUTOR(S) ******************************
- Edivando S. Santos Brasil | [email protected]
(Compatibility with FPC ($Mode objfpc/delphi) and delphi VCL 11/2018)
***************************** END CONTRIBUTOR(S) *****************************}
Unit BGRAGradients;
{$i bgrabitmap.inc}{$H+}
{$i bgrasse.inc}
interface
{ Here are various functions that draw gradients, shadow and lighting }
uses
Classes, BGRATypes,{$IFNDEF FPC}Types, GraphType,{$ENDIF} BGRAGraphics, BGRABitmapTypes, BGRABitmap, BGRABlend, BGRAPhongTypes, BGRASSE;
{$IFDEF BGRABITMAP_USE_LCL}{ Creates a bitmap with the specified text horizontally centered and with a shadow }
function TextShadow(AWidth,AHeight: Integer; AText: String; AFontHeight: Integer; ATextColor,AShadowColor: TBGRAPixel;
AOffSetX,AOffSetY: Integer; ARadius: Integer = 0; AFontStyle: TFontStyles = []; AFontName: String = 'Default'; AShowText: Boolean = True): TBGRABitmap;
{$ENDIF}
{----------------------------------------------------------------------}
{ Functions to draw multiple gradients.
See : http://wiki.lazarus.freepascal.org/Double_Gradient#nGradient }
type
TnGradientInfo = record
StartColor,StopColor: TBGRAPixel;
Direction: TGradientDirection;
EndPercent : single; // Position from 0 to 1
end;
function nGradientInfo(StartColor, StopColor: TBGRAPixel; Direction: TGradientDirection; EndPercent: Single): TnGradientInfo;
function nGradientAlphaFill(ARect: TRect; ADir: TGradientDirection; const AGradient: array of TnGradientInfo): TBGRABitmap; overload;
function nGradientAlphaFill(AWidth, AHeight: Integer; ADir: TGradientDirection; const AGradient: array of TnGradientInfo): TBGRABitmap; overload;
procedure nGradientAlphaFill(ACanvas: TCanvas; ARect: TRect; ADir: TGradientDirection; const AGradient: array of TnGradientInfo); overload;
procedure nGradientAlphaFill(ABitmap: TBGRABitmap; ARect: TRect; ADir: TGradientDirection; const AGradient: array of TnGradientInfo); overload;
function DoubleGradientAlphaFill(ARect: TRect; AStart1,AStop1,AStart2,AStop2: TBGRAPixel;
ADirection1,ADirection2,ADir: TGradientDirection; AValue: Single): TBGRABitmap; overload;
function DoubleGradientAlphaFill(AWidth,AHeight: Integer; AStart1,AStop1,AStart2,AStop2: TBGRAPixel;
ADirection1,ADirection2,ADir: TGradientDirection; AValue: Single): TBGRABitmap; overload;
procedure DoubleGradientAlphaFill(ACanvas: TCanvas; ARect: TRect; AStart1,AStop1,AStart2,AStop2: TBGRAPixel;
ADirection1,ADirection2,ADir: TGradientDirection; AValue: Single); overload;
procedure DoubleGradientAlphaFill(ABitmap: TBGRABitmap; ARect: TRect; AStart1,AStop1,AStart2,AStop2: TBGRAPixel;
ADirection1,ADirection2,ADir: TGradientDirection; AValue: Single); overload;
{----------------------------------------------------------------------}
{ Phong shading functions. Use a height map (grayscale image or a precise map filled with MapHeightToBGRA)
to determine orientation and position of the surface.
Phong shading consist in adding an ambiant light, a diffuse light (angle between light and object),
and a specular light (angle between light, object and observer, i.e. reflected light) }
type
TRectangleMapOption = (rmoNoLeftBorder,rmoNoTopBorder,rmoNoRightBorder,rmoNoBottomBorder,rmoLinearBorder);
TRectangleMapOptions = set of TRectangleMapOption;
{ TPhongShading }
TPhongShading = class(TCustomPhongShading)
LightSourceIntensity : Single; //global intensity of the light
LightSourceDistanceTerm, //minimum distance always added (positive value)
LightSourceDistanceFactor, //how much actual distance is taken into account (usually 0 or 1)
LightDestFactor : Single; //how much the location of the lightened pixel is taken into account (usually 0 or 1)
LightPositionZ : Integer;
LightColor: TBGRAPixel; //color of the light reflection
SpecularFactor, //how much light is reflected (0..1)
SpecularIndex : Single; //how concentrated reflected light is (positive value)
AmbientFactor, //ambiant lighting whereever the point is (0..1)
DiffusionFactor, //diffusion, i.e. how much pixels are lightened by light source (0..1)
NegativeDiffusionFactor : Single; //how much hidden surface are darkened (0..1)
DiffuseSaturation: Boolean; //when diffusion saturates, use light color to show it
constructor Create;
{ Render the specified map on the destination bitmap with one solid color. Map altitude
indicate the global height of the map. }
procedure Draw(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
Color : TBGRAPixel); override;
{ Render with a color map of the same size as the height map. Map altitude
indicate the global height of the map. }
procedure Draw(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
ColorMap : TBGRACustomBitmap); override;
{ Render with a color scanner. Map altitude
indicate the global height of the map. }
procedure DrawScan(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
ColorScan : IBGRAScanner); override;
{ Draw a cone of the specified color }
procedure DrawCone(dest: TBGRACustomBitmap; X,Y,Size,Altitude: Integer; Color: TBGRAPixel); overload;
procedure DrawCone(dest: TBGRACustomBitmap; bounds: TRect; Altitude: Integer; Color: TBGRAPixel); overload;
{ Draw a vertical cone of the specified color }
procedure DrawVerticalCone(dest: TBGRACustomBitmap; bounds: TRect; Altitude: Integer; Color: TBGRAPixel);
{ Draw an horizontal cylinder of the specified color }
procedure DrawHorizontalCylinder(dest: TBGRACustomBitmap; bounds: TRect; Altitude: Integer; Color: TBGRAPixel);
{ Draw a vertical cylinder of the specified color }
procedure DrawVerticalCylinder(dest: TBGRACustomBitmap; bounds: TRect; Altitude: Integer; Color: TBGRAPixel);
{ Draw a hemisphere of the specified color }
procedure DrawSphere(dest: TBGRACustomBitmap; bounds: TRect; Altitude: Integer; Color: TBGRAPixel);
{ Draw a rectangle of the specified color }
procedure DrawRectangle(dest: TBGRACustomBitmap; bounds: TRect; Border,Altitude: Integer; Color: TBGRAPixel; RoundCorners: Boolean; Options: TRectangleMapOptions);
protected
procedure DrawMapNormal(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
ColorMap : TBGRACustomBitmap);
procedure DrawScannerNormal(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
ColorScan : IBGRAScanner);
procedure DrawColorNormal(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
Color : TBGRAPixel);
{$ifdef BGRASSE_AVAILABLE}
procedure DrawMapSSE(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
ColorMap : TBGRACustomBitmap);
procedure DrawScannerSSE(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
ColorScan : IBGRAScanner);
procedure DrawColorSSE(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
Color : TBGRAPixel);
{$endif}
end;
{ Create a grayscale height map for a cone (may not be precise enough) }
function CreateConeMap(size: integer): TBGRABitmap;
{ Create a precise height map for a cone (not grayscale anymore but more precise) }
function CreateConePreciseMap(width,height: integer): TBGRABitmap;
{ Create a precise height map for a vertical cone (not grayscale anymore but more precise) }
function CreateVerticalConePreciseMap(width,height: integer): TBGRABitmap;
{ Create a precise height map for a vertical cylinder (not grayscale anymore but more precise) }
function CreateVerticalCylinderPreciseMap(width,height: integer): TBGRABitmap;
{ Create a precise height map for an horizontal cylinder (not grayscale anymore but more precise) }
function CreateHorizontalCylinderPreciseMap(width,height: integer): TBGRABitmap;
{ Create a grayscale height map for a sphere (may not be precise enough) }
function CreateSphereMap(width,height: integer): TBGRABitmap;
{ Create a precise height map for a sphere (not grayscale anymore but more precise) }
function CreateSpherePreciseMap(width,height: integer): TBGRABitmap;
{ Create a rectangle height map with a border }
function CreateRectangleMap(width,height,border: integer; options: TRectangleMapOptions = []): TBGRABitmap;
{ Create a precise height map for a rectangle height map with a border (not grayscale anymore but more precise) }
function CreateRectanglePreciseMap(width,height,border: integer; options: TRectangleMapOptions = []): TBGRABitmap;
{ Create a round rectangle height map with a border }
function CreateRoundRectangleMap(width,height,border: integer; options: TRectangleMapOptions = []): TBGRABitmap;
{ Create a precise height map for a round rectangle height map with a border (not grayscale anymore but more precise) }
function CreateRoundRectanglePreciseMap(width,height,border: integer; options: TRectangleMapOptions = []): TBGRABitmap;
{---------- Perlin Noise -------------}
{ Random image using a superposition of interpolated random values.
See : http://wiki.lazarus.freepascal.org/Perlin_Noise
http://freespace.virgin.net/hugo.elias/models/m_perlin.htm }
{ Creates a non-tilable random grayscale image }
function CreatePerlinNoiseMap(AWidth, AHeight: integer; HorizontalPeriod: Single = 1;
VerticalPeriod: Single = 1; Exponent: Double = 1; ResampleFilter: TResampleFilter = rfCosine): TBGRABitmap;
{ Creates a tilable random grayscale image }
function CreateCyclicPerlinNoiseMap(AWidth, AHeight: integer; HorizontalPeriod: Single = 1;
VerticalPeriod: Single = 1; Exponent: Double = 1; ResampleFilter: TResampleFilter = rfCosine): TBGRABitmap;
implementation
uses SysUtils{$IFDEF BGRABITMAP_USE_LCL}, BGRATextFX{$ENDIF}; {GraphType unit used by phongdraw.inc}
{$IFDEF BGRABITMAP_USE_LCL}function TextShadow(AWidth, AHeight: Integer; AText: String;
AFontHeight: Integer; ATextColor, AShadowColor: TBGRAPixel; AOffSetX,
AOffSetY: Integer; ARadius: Integer; AFontStyle: TFontStyles;
AFontName: String; AShowText: Boolean): TBGRABitmap;
begin
result := BGRATextFX.TextShadow(AWidth,AHeight,AText,AFontHeight,ATextColor,AShadowColor,AOffsetX,AOffsetY,ARadius,AFontStyle,AFontName,AShowText) as TBGRABitmap;
end;{$ENDIF}
function nGradientInfo(StartColor, StopColor: TBGRAPixel;
Direction: TGradientDirection; EndPercent: Single): TnGradientInfo;
begin
result.StartColor := StartColor;
result.StopColor := StopColor;
result.Direction := Direction;
result.EndPercent := EndPercent;
end;
function DoubleGradientAlphaFill(ARect: TRect; AStart1,AStop1,AStart2,AStop2: TBGRAPixel;
ADirection1,ADirection2,ADir: TGradientDirection; AValue: Single): TBGRABitmap;
var
ABitmap: TBGRABitmap;
ARect1,ARect2: TRect;
APoint1,APoint2,APoint3,APoint4: TPointF;
begin
Dec(ARect.Right, ARect.Left);
ARect.Left := 0;
Dec(ARect.Bottom,ARect.Top);
ARect.Top := 0;
ABitmap := TBGRABitmap.Create(ARect.Right,ARect.Bottom);
if AValue <> 0 then ARect1:=ARect;
if AValue <> 1 then ARect2:=ARect;
if ADir = gdVertical then begin
ARect1.Bottom:=Round(ARect1.Bottom * AValue);
ARect2.Top:=ARect1.Bottom;
end
else if ADir = gdHorizontal then begin
ARect1.Right:=Round(ARect1.Right * AValue);
ARect2.Left:=ARect1.Right;
end;
if ADirection1 = gdVertical then begin
APoint1:=PointF(ARect1.Left,ARect1.Top);
APoint2:=PointF(ARect1.Left,ARect1.Bottom);
end
else if ADirection1 = gdHorizontal then begin
APoint1:=PointF(ARect1.Left,ARect1.Top);
APoint2:=PointF(ARect1.Right,ARect1.Top);
end;
if ADirection2 = gdVertical then begin
APoint3:=PointF(ARect2.Left,ARect2.Top);
APoint4:=PointF(ARect2.Left,ARect2.Bottom);
end
else if ADirection2 = gdHorizontal then begin
APoint3:=PointF(ARect2.Left,ARect2.Top);
APoint4:=PointF(ARect2.Right,ARect2.Top);
end;
if AValue <> 0 then
ABitmap.GradientFill(ARect1.Left,ARect1.Top,ARect1.Right,ARect1.Bottom,
AStart1,AStop1,gtLinear,APoint1,APoint2,dmSet,True);
if AValue <> 1 then
ABitmap.GradientFill( ARect2.Left,ARect2.Top,ARect2.Right,ARect2.Bottom,
AStart2,AStop2,gtLinear,APoint3,APoint4,dmSet,True);
Result:=ABitmap;
end;
function DoubleGradientAlphaFill(AWidth, AHeight: Integer; AStart1, AStop1,
AStart2, AStop2: TBGRAPixel; ADirection1, ADirection2,
ADir: TGradientDirection; AValue: Single): TBGRABitmap;
begin
result := DoubleGradientAlphaFill(Rect(0,0,AWidth,AHeight),
AStart1,AStop1,AStart2,AStop2,
ADirection1,ADirection2, ADir, AValue);
end;
procedure DoubleGradientAlphaFill(ACanvas: TCanvas; ARect: TRect; AStart1,
AStop1, AStart2, AStop2: TBGRAPixel; ADirection1, ADirection2,
ADir: TGradientDirection; AValue: Single);
var
bmp: TBGRABitmap;
begin
bmp := DoubleGradientAlphaFill(ARect,AStart1,AStop1,AStart2,AStop2,ADirection1,ADirection2,ADir,AValue);
bmp.Draw(ACanvas,ARect.Left,ARect.Top,not bmp.HasTransparentPixels);
bmp.Free;
end;
procedure DoubleGradientAlphaFill(ABitmap: TBGRABitmap; ARect: TRect; AStart1,
AStop1, AStart2, AStop2: TBGRAPixel; ADirection1, ADirection2,
ADir: TGradientDirection; AValue: Single);
var
bmp: TBGRABitmap;
begin
bmp := DoubleGradientAlphaFill(ARect,AStart1,AStop1,AStart2,AStop2,ADirection1,ADirection2,ADir,AValue);
ABitmap.PutImage(ARect.Left,ARect.Top,bmp,dmDrawWithTransparency);
bmp.Free;
end;
function nGradientAlphaFill(ARect: TRect; ADir: TGradientDirection;
const AGradient: array of TnGradientInfo): TBGRABitmap;
var
i:integer;
AnRect, OldRect: TRect;
Point1, Point2: TPointF;
begin
Result := TBGRABitmap.Create(ARect.Right-ARect.Left,ARect.Bottom-ARect.Top);
Dec(ARect.Right, ARect.Left);
ARect.Left := 0;
Dec(ARect.Bottom,ARect.Top);
ARect.Top := 0;
OldRect := ARect;
if ADir = gdVertical then
OldRect.Bottom := ARect.Top
else
OldRect.Right := ARect.Left;
for i := 0 to high(AGradient) do
begin
AnRect:=OldRect;
if ADir = gdVertical then
begin
AnRect.Bottom:=Round((ARect.Bottom-ARect.Top) * AGradient[i].endPercent + ARect.Top);
AnRect.Top:=OldRect.Bottom;
Point1:=PointF(AnRect.Left,AnRect.Top);
Point2:=PointF(AnRect.Left,AnRect.Bottom);
end
else
begin
AnRect.Right:=Round((ARect.Right-ARect.Left) * AGradient[i].endPercent + ARect.Left);
AnRect.Left:=OldRect.Right;
Point1:=PointF(AnRect.Left,AnRect.Top);
Point2:=PointF(AnRect.Right,AnRect.Top);
end;
Result.GradientFill(AnRect.Left,AnRect.Top,AnRect.Right,AnRect.Bottom,
AGradient[i].StartColor,AGradient[i].StopColor,gtLinear,Point1,Point2,dmSet,True);
OldRect := AnRect;
end;
end;
function nGradientAlphaFill(AWidth, AHeight: Integer; ADir: TGradientDirection;
const AGradient: array of TnGradientInfo): TBGRABitmap;
begin
result := nGradientAlphaFill(Rect(0,0,AWidth,AHeight),ADir,AGradient);
end;
procedure nGradientAlphaFill(ACanvas: TCanvas; ARect: TRect;
ADir: TGradientDirection; const AGradient: array of TnGradientInfo);
var
bmp: TBGRABitmap;
begin
bmp := nGradientAlphaFill(ARect, ADir, AGradient);
bmp.Draw(ACanvas,ARect.Left,ARect.Top,not bmp.HasTransparentPixels);
bmp.Free;
end;
procedure nGradientAlphaFill(ABitmap: TBGRABitmap; ARect: TRect;
ADir: TGradientDirection; const AGradient: array of TnGradientInfo);
var
bmp: TBGRABitmap;
begin
bmp := nGradientAlphaFill(ARect, ADir, AGradient);
ABitmap.PutImage(ARect.Left,ARect.Top,bmp,dmDrawWithTransparency);
bmp.Free;
end;
{ TPhongShading }
constructor TPhongShading.Create;
begin
//set default values
LightSourceIntensity := 500;
LightSourceDistanceTerm := 150;
LightSourceDistanceFactor := 1;
LightDestFactor := 1;
LightColor := BGRAWhite;
AmbientFactor := 0.3;
DiffusionFactor := 0.9;
DiffuseSaturation:= False;
NegativeDiffusionFactor := 0.1;
SpecularFactor := 0.6;
SpecularIndex := 10;
LightPosition := Point(-100,-100);
LightPositionZ := 100;
end;
Const
PhongLightPrecisionSh = 12;
PhongLightPrecision = 1 shl PhongLightPrecisionSh;
PhongLightPrecisionDiv2 = PhongLightPrecision shr 1;
{------------------ Phong drawing ----------------}
{ Look for the fastest method available }
procedure TPhongShading.Draw(dest: TBGRACustomBitmap; map: TBGRACustomBitmap; mapAltitude: integer; ofsX,ofsY: integer;
Color : TBGRAPixel);
begin
{$ifdef BGRASSE_AVAILABLE}
if UseSSE then
DrawColorSSE(dest,map,mapAltitude,ofsX,ofsY,Color)
else
{$endif}
DrawColorNormal(dest,map,mapAltitude,ofsX,ofsY,Color);
end;
procedure TPhongShading.Draw(dest: TBGRACustomBitmap; map: TBGRACustomBitmap;
mapAltitude: integer; ofsX, ofsY: integer; ColorMap: TBGRACustomBitmap);
begin
{$ifdef BGRASSE_AVAILABLE}
if UseSSE then
DrawMapSSE(dest,map,mapAltitude,ofsX,ofsY,ColorMap)
else
{$endif}
DrawMapNormal(dest,map,mapAltitude,ofsX,ofsY,ColorMap);
end;
procedure TPhongShading.DrawScan(dest: TBGRACustomBitmap; map: TBGRACustomBitmap;
mapAltitude: integer; ofsX, ofsY: integer; ColorScan: IBGRAScanner);
begin
{$ifdef BGRASSE_AVAILABLE}
if UseSSE then
DrawScannerSSE(dest,map,mapAltitude,ofsX,ofsY,ColorScan)
else
{$endif}
DrawScannerNormal(dest,map,mapAltitude,ofsX,ofsY,ColorScan);
end;
{------------------ End of phong drawing ----------------}
procedure TPhongShading.DrawCone(dest: TBGRACustomBitmap; X, Y, Size,
Altitude: Integer; Color: TBGRAPixel);
var map: TBGRABitmap;
begin
map := CreateConePreciseMap(Size,Size);
Draw(dest,map,Altitude,X,Y,Color);
map.Free;
end;
procedure TPhongShading.DrawCone(dest: TBGRACustomBitmap; bounds: TRect;
Altitude: Integer; Color: TBGRAPixel);
var map: TBGRABitmap;
temp: integer;
begin
if Bounds.Right < Bounds.Left then
begin
temp := Bounds.Left;
bounds.Left := bounds.Right;
Bounds.Right := temp;
end;
if Bounds.Bottom < Bounds.Top then
begin
temp := Bounds.Bottom;
bounds.Bottom := bounds.Top;
Bounds.Top := temp;
end;
map := CreateConePreciseMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top);
Draw(dest,map,Altitude,bounds.Left,bounds.Top,Color);
map.Free;
end;
procedure TPhongShading.DrawVerticalCone(dest: TBGRACustomBitmap;
bounds: TRect; Altitude: Integer; Color: TBGRAPixel);
var map: TBGRABitmap;
temp: integer;
begin
if Bounds.Right < Bounds.Left then
begin
temp := Bounds.Left;
bounds.Left := bounds.Right;
Bounds.Right := temp;
end;
if Bounds.Bottom < Bounds.Top then
begin
temp := Bounds.Bottom;
bounds.Bottom := bounds.Top;
Bounds.Top := temp;
end;
map := CreateVerticalConePreciseMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top);
Draw(dest,map,Altitude,bounds.Left,bounds.Top,Color);
map.Free;
end;
procedure TPhongShading.DrawHorizontalCylinder(dest: TBGRACustomBitmap;
bounds: TRect; Altitude: Integer; Color: TBGRAPixel);
var map: TBGRABitmap;
temp: integer;
begin
if Bounds.Right < Bounds.Left then
begin
temp := Bounds.Left;
bounds.Left := bounds.Right;
Bounds.Right := temp;
end;
if Bounds.Bottom < Bounds.Top then
begin
temp := Bounds.Bottom;
bounds.Bottom := bounds.Top;
Bounds.Top := temp;
end;
map := CreateHorizontalCylinderPreciseMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top);
Draw(dest,map,Altitude,bounds.Left,bounds.Top,Color);
map.Free;
end;
procedure TPhongShading.DrawVerticalCylinder(dest: TBGRACustomBitmap;
bounds: TRect; Altitude: Integer; Color: TBGRAPixel);
var map: TBGRABitmap;
temp: integer;
begin
if Bounds.Right < Bounds.Left then
begin
temp := Bounds.Left;
bounds.Left := bounds.Right;
Bounds.Right := temp;
end;
if Bounds.Bottom < Bounds.Top then
begin
temp := Bounds.Bottom;
bounds.Bottom := bounds.Top;
Bounds.Top := temp;
end;
map := CreateVerticalCylinderPreciseMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top);
Draw(dest,map,Altitude,bounds.Left,bounds.Top,Color);
map.Free;
end;
procedure TPhongShading.DrawSphere(dest: TBGRACustomBitmap; bounds: TRect;
Altitude: Integer; Color: TBGRAPixel);
var map: TBGRABitmap;
temp: integer;
begin
if Bounds.Right < Bounds.Left then
begin
temp := Bounds.Left;
bounds.Left := bounds.Right;
Bounds.Right := temp;
end;
if Bounds.Bottom < Bounds.Top then
begin
temp := Bounds.Bottom;
bounds.Bottom := bounds.Top;
Bounds.Top := temp;
end;
map := CreateSpherePreciseMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top);
Draw(dest,map,Altitude,bounds.Left,bounds.Top,Color);
map.Free;
end;
procedure TPhongShading.DrawRectangle(dest: TBGRACustomBitmap; bounds: TRect;
Border,Altitude: Integer; Color: TBGRAPixel; RoundCorners: Boolean; Options: TRectangleMapOptions);
var map: TBGRABitmap;
temp: integer;
begin
if Bounds.Right < Bounds.Left then
begin
temp := Bounds.Left;
bounds.Left := bounds.Right;
Bounds.Right := temp;
end;
if Bounds.Bottom < Bounds.Top then
begin
temp := Bounds.Bottom;
bounds.Bottom := bounds.Top;
Bounds.Top := temp;
end;
if border > 10 then
begin
if RoundCorners then
map := CreateRoundRectanglePreciseMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top,Border,Options)
else
map := CreateRectanglePreciseMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top,Border,Options);
end else
begin
if RoundCorners then
map := CreateRoundRectangleMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top,Border,Options)
else
map := CreateRectangleMap(Bounds.Right-Bounds.Left,Bounds.Bottom-Bounds.Top,Border,Options);
end;
Draw(dest,map,Altitude,bounds.Left,bounds.Top,Color);
map.Free;
end;
procedure TPhongShading.DrawMapNormal(dest: TBGRACustomBitmap; map: TBGRACustomBitmap;
mapAltitude: integer; ofsX, ofsY: integer; ColorMap: TBGRACustomBitmap);
{$I phongdraw.inc }
procedure TPhongShading.DrawColorNormal(dest: TBGRACustomBitmap; map: TBGRACustomBitmap;
mapAltitude: integer; ofsX, ofsY: integer; Color: TBGRAPixel);
{$define PARAM_SIMPLECOLOR}
{$I phongdraw.inc }
procedure TPhongShading.DrawScannerNormal(dest: TBGRACustomBitmap;
map: TBGRACustomBitmap; mapAltitude: integer; ofsX, ofsY: integer;
ColorScan: IBGRAScanner);
{$define PARAM_SCANNER}
{$I phongdraw.inc }
{$ifdef BGRASSE_AVAILABLE}
procedure TPhongShading.DrawMapSSE(dest: TBGRACustomBitmap; map: TBGRACustomBitmap;
mapAltitude: integer; ofsX, ofsY: integer; ColorMap: TBGRACustomBitmap);
{$define PARAM_PHONGSSE}
{$I phongdraw.inc }
procedure TPhongShading.DrawColorSSE(dest: TBGRACustomBitmap; map: TBGRACustomBitmap;
mapAltitude: integer; ofsX, ofsY: integer; Color: TBGRAPixel);
{$define PARAM_PHONGSSE}
{$define PARAM_SIMPLECOLOR}
{$I phongdraw.inc }
procedure TPhongShading.DrawScannerSSE(dest: TBGRACustomBitmap;
map: TBGRACustomBitmap; mapAltitude: integer; ofsX, ofsY: integer;
ColorScan: IBGRAScanner);
{$define PARAM_PHONGSSE}
{$define PARAM_SCANNER}
{$I phongdraw.inc }
{$endif}
{************************ maps ***********************************}
function CreateConeMap(size: integer): TBGRABitmap;
var cx,cy,r: single;
mask: TBGRABitmap;
begin
cx := (size-1)/2;
cy := (size-1)/2;
r := (size-1)/2;
result := TBGRABitmap.Create(size,size);
result.GradientFill(0,0,size,size,BGRAWhite,BGRABlack,gtRadial,PointF(cx,cy),PointF(cx+r,cy),dmSet,False);
mask := TBGRABitmap.Create(size,size,BGRABlack);
mask.FillEllipseAntialias(cx,cy,r,r,BGRAWhite);
result.ApplyMask(mask);
mask.Free;
end;
function CreateConePreciseMap(width,height: integer): TBGRABitmap;
var cx,cy,rx,ry,d: single;
xb,yb: integer;
p: PBGRAPixel;
mask: TBGRABitmap;
begin
result := TBGRABitmap.Create(width,height);
cx := (width-1)/2;
cy := (height-1)/2;
rx := (width-1)/2;
ry := (height-1)/2;
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
for xb := 0 to width-1 do
begin
d := sqr((xb-cx)/(rx+1))+sqr((yb-cy)/(ry+1));
if d >= 1 then
p^ := BGRAPixelTransparent else
p^ := MapHeightToBGRA(1-sqrt(d),255);
inc(p);
end;
end;
//antialiased border
mask := TBGRABitmap.Create(width,height,BGRABlack);
mask.FillEllipseAntialias(cx,cy,rx,ry,BGRAWhite);
result.ApplyMask(mask);
mask.Free;
end;
function CreateVerticalConePreciseMap(width, height: integer): TBGRABitmap;
var cx,rx,d,vpos: single;
xb,yb: integer;
p: PBGRAPixel;
mask: TBGRABitmap;
begin
result := TBGRABitmap.Create(width,height);
if (height=0) or (width=0) then exit;
cx := (width-1)/2;
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
vpos := (yb+1)/height;
rx := width/2*vpos;
for xb := 0 to width-1 do
begin
d := sqr((xb-cx)/(rx+1));
if d >= 1 then
p^ := BGRAPixelTransparent else
p^ := MapHeightToBGRA(sqrt(1-d)*vpos,255);
inc(p);
end;
end;
//antialiased border
mask := TBGRABitmap.Create(width,height,BGRABlack);
mask.FillPolyAntialias([PointF(width/2,-0.5),PointF(0,height-0.5),PointF(width-0.5,height-0.5)],BGRAWhite);
result.ApplyMask(mask);
mask.Free;
end;
function CreateVerticalCylinderPreciseMap(width, height: integer): TBGRABitmap;
var cx,rx,d: single;
xb: integer;
begin
result := TBGRABitmap.Create(width,height);
if (height=0) or (width=0) then exit;
rx := width/2;
cx := (width-1)/2;
for xb := 0 to width-1 do
begin
d := sqr((xb-cx)/(rx+1));
result.SetVertLine(xb,0,height-1,MapHeightToBGRA(sqrt(1-d),255));
end;
end;
function CreateHorizontalCylinderPreciseMap(width, height: integer
): TBGRABitmap;
var cy,ry,d: single;
xb,yb: integer;
p: PBGRAPixel;
c: TBGRAPixel;
begin
result := TBGRABitmap.Create(width,height);
if (height=0) or (width=0) then exit;
ry := height/2;
cy := (height-1)/2;
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
d := sqr((yb-cy)/(ry+1));
c := MapHeightToBGRA(sqrt(1-d),255);
for xb := 0 to width-1 do
begin
p^ := c;
inc(p);
end;
end;
end;
function CreateSphereMap(width,height: integer): TBGRABitmap;
var cx,cy,rx,ry,d: single;
xb,yb: integer;
p: PBGRAPixel;
h: integer;
mask: TBGRABitmap;
begin
result := TBGRABitmap.Create(width,height);
cx := (width-1)/2;
cy := (height-1)/2;
rx := (width-1)/2;
ry := (height-1)/2;
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
for xb := 0 to width-1 do
begin
d := sqr((xb-cx)/(rx+1))+sqr((yb-cy)/(ry+1));
if d >= 1 then
p^ := BGRAPixelTransparent else
begin
h := round(sqrt(1-d)*255);
p^.red := h;
p^.green := h;
p^.blue := h;
p^.alpha := 255;
end;
inc(p);
end;
end;
//antialiased border
mask := TBGRABitmap.Create(width,height,BGRABlack);
mask.FillEllipseAntialias(cx,cy,rx,ry,BGRAWhite);
result.ApplyMask(mask);
mask.Free;
end;
procedure MapBorderLimit(width,height: integer; options: TRectangleMapOptions; var border: integer);
var maxHoriz,maxVert: integer;
begin
if [rmoNoLeftBorder,rmoNoRightBorder] <= options then maxHoriz := border else
if [rmoNoLeftBorder,rmoNoRightBorder] * options = [] then maxHoriz := width div 2 else
maxHoriz := width;
if border > maxHoriz then border := maxHoriz;
if [rmoNoTopBorder,rmoNoBottomBorder] <= options then maxVert := border else
if [rmoNoTopBorder,rmoNoBottomBorder] * options = [] then maxVert := height div 2 else
maxVert := height;
if border > maxVert then border := maxVert;
end;
function CreateSpherePreciseMap(width, height: integer): TBGRABitmap;
var cx,cy,rx,ry,d: single;
xb,yb: integer;
p: PBGRAPixel;
mask: TBGRABitmap;
begin
result := TBGRABitmap.Create(width,height);
cx := (width-1)/2;
cy := (height-1)/2;
rx := (width-1)/2;
ry := (height-1)/2;
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
for xb := 0 to width-1 do
begin
d := sqr((xb-cx)/(rx+1))+sqr((yb-cy)/(ry+1));
if d >= 1 then
p^ := BGRAPixelTransparent else
p^ := MapHeightToBGRA(sqrt(1-d),255);
inc(p);
end;
end;
//antialiased border
mask := TBGRABitmap.Create(width,height,BGRABlack);
mask.FillEllipseAntialias(cx,cy,rx,ry,BGRAWhite);
result.ApplyMask(mask);
mask.Free;
end;
procedure RectangleMapRemoveCorners(dest: TBGRABitmap; options: TRectangleMapOptions);
begin
if [rmoNoLeftBorder,rmoNoTopBorder]*Options = [] then
begin
dest.SetPixel(0,0,BGRAPixelTransparent);
dest.ErasePixel(1,0,128);
dest.ErasePixel(0,1,128);
end;
if [rmoNoRightBorder,rmoNoTopBorder]*Options = [] then
begin
dest.SetPixel(dest.width-1,0,BGRAPixelTransparent);
dest.ErasePixel(dest.width-2,0,128);
dest.ErasePixel(dest.width-1,1,128);
end;
if [rmoNoRightBorder,rmoNoBottomBorder]*Options = [] then
begin
dest.SetPixel(dest.width-1,dest.height-1,BGRAPixelTransparent);
dest.ErasePixel(dest.width-2,dest.height-1,128);
dest.ErasePixel(dest.width-1,dest.height-2,128);
end;
if [rmoNoLeftBorder,rmoNoBottomBorder]*Options = [] then
begin
dest.SetPixel(0,dest.height-1,BGRAPixelTransparent);
dest.ErasePixel(1,dest.height-1,128);
dest.ErasePixel(0,dest.height-2,128);
end;
end;
function CreateRectangleMap(width,height,border: integer; options: TRectangleMapOptions = []): TBGRABitmap;
var xb,yb: integer;
p: PBGRAPixel;
h: integer;
begin
MapBorderLimit(width,height,options,border);
result := TBGRABitmap.Create(width,height);
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
for xb := 0 to width-1 do
begin
if not (rmoNoLeftBorder in options) and (xb < border) and (yb > xb) and (yb < height-1-xb) then h := xb else
if not (rmoNoRightBorder in options) and (xb > width-1-border) and (yb > width-1-xb) and (yb < height-1-(width-1-xb)) then h := width-1-xb else
if not (rmoNoTopBorder in options) and (yb < border) and (xb > yb) and (xb < width-1-yb) then h := yb else
if not (rmoNoBottomBorder in options) and (yb > height-1-border) and (xb > height-1-yb) and (xb < width-1-(height-1-yb)) then h := height-1-yb else
if not (rmoNoLeftBorder in options) and (xb < border) then h := xb else
if not (rmoNoRightBorder in options) and (xb > width-1-border) then h := width-1-xb else
if not (rmoNoTopBorder in options) and (yb < border) then h := yb else
if not (rmoNoBottomBorder in options) and (yb > height-1-border) then h := height-1-yb else
begin
p^ := BGRAWhite;
inc(p);
Continue;
end;
if rmoLinearBorder in options then h := h*256 div border else
h := round(sin((h+1/2)/border*Pi/2)*255);
p^.red := h;
p^.green := h;
p^.blue := h;
p^.alpha := 255;
inc(p);
end;
end;
RectangleMapRemoveCorners(result,options);
end;
function CreateRectanglePreciseMap(width, height, border: integer;
options: TRectangleMapOptions): TBGRABitmap;
var xb,yb: integer;
p: PBGRAPixel;
h: single;
begin
MapBorderLimit(width,height,options,border);
result := TBGRABitmap.Create(width,height);
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
for xb := 0 to width-1 do
begin
if not (rmoNoLeftBorder in options) and (xb < border) and (yb > xb) and (yb < height-1-xb) then h := xb else
if not (rmoNoRightBorder in options) and (xb > width-1-border) and (yb > width-1-xb) and (yb < height-1-(width-1-xb)) then h := width-1-xb else
if not (rmoNoTopBorder in options) and (yb < border) and (xb > yb) and (xb < width-1-yb) then h := yb else
if not (rmoNoBottomBorder in options) and (yb > height-1-border) and (xb > height-1-yb) and (xb < width-1-(height-1-yb)) then h := height-1-yb else
if not (rmoNoLeftBorder in options) and (xb < border) then h := xb else
if not (rmoNoRightBorder in options) and (xb > width-1-border) then h := width-1-xb else
if not (rmoNoTopBorder in options) and (yb < border) then h := yb else
if not (rmoNoBottomBorder in options) and (yb > height-1-border) then h := height-1-yb else
begin
p^ := BGRAWhite;
inc(p);
Continue;
end;
if rmoLinearBorder in options then h := h/border else
h := sin((h+1/2)/border*Pi/2);
p^ := MapHeightToBGRA(h,255);
inc(p);
end;
end;
RectangleMapRemoveCorners(result,options);
end;
function CreateRoundRectangleMap(width,height,border: integer; options: TRectangleMapOptions = []): TBGRABitmap;
var d: single;
xb,yb: integer;
p: PBGRAPixel;
h: integer;
begin
MapBorderLimit(width,height,options,border);
result := TBGRABitmap.Create(width,height);
for yb := 0 to height-1 do
begin
p := result.scanline[yb];
for xb := 0 to width-1 do
begin
if not (rmoNoLeftBorder in options) and not (rmoNoTopBorder in options) and (xb < border) and (yb < border) then d := border-sqrt(sqr(border-xb)+sqr(border-yb)) else
if not (rmoNoLeftBorder in options) and not (rmoNoBottomBorder in options) and (xb < border) and (yb > height-1-border) then d := border-sqrt(sqr(border-xb)+sqr(border-(height-1-yb))) else
if not (rmoNoRightBorder in options) and not (rmoNoTopBorder in options) and (xb > width-1-border) and (yb < border) then d := border-sqrt(sqr(border-(width-1-xb))+sqr(border-yb)) else
if not (rmoNoRightBorder in options) and not (rmoNoBottomBorder in options) and (xb > width-1-border) and (yb > height-1-border) then d := border-sqrt(sqr(border-(width-1-xb))+sqr(border-(height-1-yb))) else
if not (rmoNoLeftBorder in options) and (xb < border) then d := xb else
if not (rmoNoRightBorder in options) and (xb > width-1-border) then d := width-1-xb else
if not (rmoNoTopBorder in options) and (yb < border) then d := yb else
if not (rmoNoBottomBorder in options) and (yb > height-1-border) then d := height-1-yb else
begin
p^ := BGRAWhite;
inc(p);
Continue;
end;
d := (d+1)*border/(border+1);
if d < 0 then
p^ := BGRAPixelTransparent else
begin
if rmoLinearBorder in options then h := trunc(d*256/border) else
h := round(sin((d+1/2)/border*Pi/2)*255);
p^.red := h;
p^.green := h;
p^.blue := h;
if d < 1 then p^.alpha := round(d*255) else
p^.alpha := 255;
end;
inc(p);
end;
end;
end;
function CreatePerlinNoiseMap(AWidth, AHeight: integer; HorizontalPeriod: Single;
VerticalPeriod: Single; Exponent: Double; ResampleFilter: TResampleFilter): TBGRABitmap;
procedure AddNoise(frequencyH, frequencyV: integer; amplitude: byte; dest: TBGRABitmap);
var small,resampled: TBGRABitmap;
p: PBGRAPixel;
i: Integer;
begin
if (frequencyH = 0) or (frequencyV = 0) then exit;
small := TBGRABitmap.Create(frequencyH,frequencyV);