mirror of
https://gitlab.com/freepascal.org/lazarus/lazarus.git
synced 2025-08-12 13:50:06 +02:00
FreeType: Support for rotated text.
git-svn-id: trunk@63846 -
This commit is contained in:
jesus
parent
a04423bc0d
commit
e7f57c722d
@ -21,7 +21,7 @@ interface
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uses
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Classes, SysUtils, fpimage, Laz_AVL_Tree,
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// LazUtils // Note: Types must be after TTTypes for PByte.
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LazUTF8, LazFreeType, TTRASTER, TTTypes, Types;
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LazUTF8, LazFreeType, TTRASTER, TTTypes, TTObjs, Types;
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type
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TGlyphRenderQuality = (grqMonochrome, grqLowQuality, grqHighQuality);
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@ -184,6 +184,7 @@ type
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procedure SetHinted(const AValue: boolean); virtual; abstract;
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public
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UnderlineDecoration,StrikeOutDecoration: boolean;
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Orientation: integer;
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function TextWidth(AText: string): single; virtual; abstract;
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function TextHeight(AText: string): single; virtual; abstract;
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function CharWidthFromUnicode(AUnicode: integer): single; virtual; abstract;
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@ -339,13 +340,16 @@ type
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FLoaded: boolean;
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FGlyphData: TT_Glyph;
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FIndex: integer;
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FOrientation: Integer;
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function GetAdvance: single;
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function GetBounds: TRect;
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function GetBoundsWithOffset(x, y: single): TRect;
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{%H-}constructor create;
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public
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constructor Create(AFont: TFreeTypeFont; AIndex: integer);
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function RenderDirectly(x,y: single; Rect: TRect; OnRender : TDirectRenderingFunction; quality : TGlyphRenderQuality; ClearType: boolean = false): boolean;
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function RenderDirectly(ARasterizer: TFreeTypeRasterizer; x,y: single; Rect: TRect; OnRender : TDirectRenderingFunction; quality : TGlyphRenderQuality; ClearType: boolean = false): boolean;
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function Clone(AOrientation:Integer): TFreeTypeGlyph;
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destructor Destroy; override;
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property Loaded: boolean read FLoaded;
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property Data: TT_Glyph read FGlyphData;
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@ -752,15 +756,8 @@ end;
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{ TFreeTypeGlyph }
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function TFreeTypeGlyph.GetBounds: TRect;
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var
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metrics: TT_Glyph_Metrics;
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begin
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if TT_Get_Glyph_Metrics(FGlyphData, metrics) = TT_Err_Ok then
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with metrics.bbox do
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result := rect(IncludeFullGrainMin(xMin,64) div 64,IncludeFullGrainMin(-yMax,64) div 64,
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(IncludeFullGrainMax(xMax,64)+1) div 64,(IncludeFullGrainMax(-yMin,64)+1) div 64)
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else
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result := TRect.Empty;
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result := GetBoundsWithOffset(0, 0);
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end;
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function TFreeTypeGlyph.GetAdvance: single;
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@ -776,15 +773,30 @@ end;
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function TFreeTypeGlyph.GetBoundsWithOffset(x, y: single): TRect;
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var
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metrics: TT_Glyph_Metrics;
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outline: TT_Outline;
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bbox: TT_BBox;
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error: TT_Error;
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begin
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if TT_Get_Glyph_Metrics(FGlyphData, metrics) = TT_Err_Ok then
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if FOrientation<>0 then
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begin
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with metrics.bbox do
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error := TT_Get_Glyph_Outline(FGlyphData, outline{%H-});
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if error=TT_Err_Ok then
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error := TT_Get_Outline_BBox(outline, bbox{%H-});
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end else
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begin
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error := TT_Get_Glyph_Metrics(FGlyphData, metrics);
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if error=TT_Err_Ok then
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bbox := metrics.bbox;
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end;
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if error=TT_Err_Ok then
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with bbox do
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result := rect(IncludeFullGrainMin(xMin+round(x*64),64) div 64,
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IncludeFullGrainMin(-yMax+round(y*64),64) div 64,
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(IncludeFullGrainMax(xMax+round(x*64),64)+1) div 64,
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(IncludeFullGrainMax(-yMin+round(y*64),64)+1) div 64);
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end else
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(IncludeFullGrainMax(-yMin+round(y*64),64)+1) div 64)
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else
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result := TRect.Empty;
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end;
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@ -796,6 +808,23 @@ begin
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FIndex := AIndex;
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end;
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constructor TFreeTypeGlyph.create;
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begin
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end;
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function TFreeTypeGlyph.Clone(AOrientation: Integer): TFreeTypeGlyph;
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begin
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if not FLoaded then
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raise EFreeType.Create('Cannot create a clone of an empty glyph');
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result := TFreeTypeGlyph.create;
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result.FLoaded := FLoaded;
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result.FIndex := FIndex;
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result.FOrientation := AOrientation;
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TT_Copy_Glyph(FGlyphData, result.FGlyphData);
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end;
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function TFreeTypeGlyph.RenderDirectly(x, y: single; Rect: TRect;
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OnRender: TDirectRenderingFunction; quality : TGlyphRenderQuality; ClearType: boolean): boolean;
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begin
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@ -1239,7 +1268,7 @@ begin
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raise EFreeType.Create('No font instance');
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flags := TT_Load_Scale_Glyph;
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if FHinted then flags := flags or TT_Load_Hint_Glyph;
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result := (TT_Load_Glyph(FInstance, _glyph, glyph_index, flags) <> TT_Err_Ok);
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result := (TT_Load_Glyph(FInstance, _glyph, glyph_index, flags) = TT_Err_Ok);
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end;
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procedure TFreeTypeFont.SetWidthFactor(const AValue: single);
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@ -1526,19 +1555,44 @@ var
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idx: integer;
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g: TFreeTypeGlyph;
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prevCharcode, glyphIndex: integer;
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txmatrix: TT_Matrix;
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angle: single;
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outline: ^TT_Outline;
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vector: TT_Vector;
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corrX, corrY: single;
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begin
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if not CheckInstance then exit;
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if AText = '' then exit;
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idx := pos(LineEnding,AText);
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if Orientation<>0 then
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begin
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angle := Orientation * PI / 1800;
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txmatrix.xx := Round( cos( angle ) * $10000 );
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txmatrix.xy := -Round( sin( angle ) * $10000 );
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txmatrix.yx := Round( sin( angle ) * $10000 );
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txmatrix.yy := Round( cos( angle ) * $10000 );
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end;
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while idx <> 0 do
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begin
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RenderText(copy(AText,1,idx-1),x,y,ARect,OnRender);
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delete(AText,1,idx+length(LineEnding)-1);
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y += LineFullHeight;
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if Orientation<>0 then
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begin
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vector.x := 0;
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vector.y := -round(LineFullHeight * 64);
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TT_Transform_Vector(vector.x, vector.y, txmatrix);
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x += vector.x / 64;
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y -= vector.y / 64;
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end else
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y += LineFullHeight;
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idx := pos(LineEnding,AText);
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end;
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If Assigned(FOnRenderText) then
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FOnRenderText(AText,x,y);
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// TODO: Rotation at arbitraty angles requires antialiased drawing
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RenderTextDecoration(AText,x,y,ARect,OnRender);
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pstr := @AText[1];
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left := length(AText);
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@ -1546,25 +1600,49 @@ begin
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while left > 0 do
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begin
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charcode := UTF8CodepointToUnicode(pstr, charlen);
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inc(pstr,charlen);
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dec(left,charlen);
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glyphIndex := CharIndex[charcode];
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g := Glyph[glyphIndex];
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if Orientation<>0 then
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g := g.Clone(Orientation);
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if g <> nil then
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with g do
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begin
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corrX := Advance;
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if KerningEnabled and (prevCharcode <> -1) then
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x += GetCharKerning(prevCharcode, charcode).Kerning.x;
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corrX += round(GetCharKerning(prevCharcode, charcode).Kerning.x);
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vector.x := round(corrX * 64);
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vector.y := 0;
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if Orientation<>0 then begin
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outLine := @PGlyph(Data.z)^.outline;
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TT_Transform_Outline(outline^, txmatrix);
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TT_Transform_Vector(vector.x, vector.y, txmatrix);
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end;
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corrX := vector.x / 64;
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corry := vector.y / 64;
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if Hinted then
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RenderDirectly(x,round(y),ARect,OnRender,quality,FClearType)
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RenderDirectly(x,round(y),ARect,OnRender,quality,FClearType)
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else
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RenderDirectly(x,y,ARect,OnRender,quality,FClearType);
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RenderDirectly(x,y,ARect,OnRender,quality,FClearType);
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if FClearType then
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x += Advance/3
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x += corrX/3
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else
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x += Advance;
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x += corrX;
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y -= corrY;
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prevCharcode := charcode;
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if Orientation<>0 then
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g.Free;
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end;
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inc(pstr,charlen);
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end;
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end;
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@ -231,6 +231,12 @@ uses TTTypes, Classes;
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glyph_index : Word;
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load_flags : Integer ) : TT_Error;
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(*****************************************************************)
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(* Copy a glyph container into another one *)
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(* *)
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function TT_Copy_Glyph( var source : TT_Glyph;
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var target : TT_Glyph ) : TT_Error;
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const
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TT_Load_Scale_Glyph = 1; (* ask the loader to scale the glyph *)
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(* to the current pointsize/transform *)
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@ -1009,6 +1015,50 @@ uses
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TT_Load_Glyph := error;
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end;
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(*****************************************************************)
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(* *)
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(* *)
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function TT_Copy_Glyph(var source: TT_Glyph; var target: TT_Glyph): TT_Error;
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var
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src, dst : PGlyph;
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begin
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src := PGlyph(source.z);
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dst := PGlyph(target.z);
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if (PGlyph(source.z)<>nil) then
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begin
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if dst=nil then
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begin
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error := TT_New_Glyph(TT_Face(src^.face), target);
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if error<>TT_Err_Ok then
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begin
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TT_Copy_Glyph := error;
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exit;
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end;
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dst := PGlyph(target.z);
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end
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else
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TT_Done_Outline(dst^.outline);
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dst^.metrics := src^.metrics;
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dst^.computed_width := src^.computed_width;
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dst^.precalc_width := src^.precalc_width;
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dst^.is_composite := src^.is_composite;
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TT_New_Outline(src^.outline.n_points, src^.outline.n_contours, dst^.outline);
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dst^.outline.owner := src^.outline.owner;
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dst^.outline.high_precision := src^.outline.high_precision;
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dst^.outline.second_pass := src^.outline.second_pass;
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dst^.outline.dropout_mode := src^.outline.dropout_mode;
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TT_Copy_Glyph := TT_Copy_Outline( src^.outline, dst^.outline );
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end
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else
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TT_Copy_Glyph := TT_Err_Invalid_Glyph_Handle;
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end;
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(*****************************************************************)
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(* *)
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@ -1,12 +1,12 @@
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object Form1: TForm1
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Left = 362
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Height = 240
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Height = 336
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Top = 172
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Width = 441
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Width = 624
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Align = alBottom
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Caption = 'Test LazFreeType'
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ClientHeight = 240
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ClientWidth = 441
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ClientHeight = 336
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ClientWidth = 624
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KeyPreview = True
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OnCreate = FormCreate
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OnDestroy = FormDestroy
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@ -18,18 +18,18 @@ object Form1: TForm1
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object Panel_Option: TPanel
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Left = 0
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Height = 40
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Top = 200
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Width = 441
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Top = 296
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Width = 624
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Align = alBottom
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ClientHeight = 40
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ClientWidth = 441
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ClientWidth = 624
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ParentColor = False
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TabOrder = 0
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object TrackBar_Size: TTrackBar
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Left = 96
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Height = 25
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Top = 8
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Width = 243
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Width = 280
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Frequency = 0
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Max = 300
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Min = 1
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@ -39,9 +39,9 @@ object Form1: TForm1
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TabOrder = 0
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end
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object LFontSize: TLabel
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Left = 336
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Left = 376
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Height = 16
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Top = 12
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Top = 11
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Width = 51
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Alignment = taCenter
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Anchors = [akTop, akRight]
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@ -68,15 +68,46 @@ object Form1: TForm1
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TabOrder = 1
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Value = 1
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end
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object CheckBox_Rect: TCheckBox
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Left = 392
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object LAngle: TLabel
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Left = 440
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Height = 15
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Top = 11
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Width = 11
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Anchors = [akTop, akRight]
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Caption = '0º'
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ParentColor = False
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end
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object CheckBox_SingleLine: TRadioButton
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Left = 472
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Height = 19
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Top = 10
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Top = 12
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Width = 51
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Anchors = [akTop, akRight]
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Caption = '1 Line'
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OnChange = CheckBox_SingleLineChange
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TabOrder = 2
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end
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object CheckBox_Rot: TRadioButton
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Left = 576
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Height = 19
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Top = 12
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Width = 38
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Anchors = [akTop, akRight]
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Caption = 'Rot'
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OnChange = CheckBox_SingleLineChange
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TabOrder = 3
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end
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object CheckBox_Para: TRadioButton
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Left = 528
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Height = 19
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Top = 12
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Width = 43
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Anchors = [akTop, akRight]
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Caption = 'Rect'
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OnChange = CheckBox_RectChange
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TabOrder = 2
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Checked = True
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OnChange = CheckBox_SingleLineChange
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TabOrder = 4
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TabStop = True
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end
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end
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end
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@ -5,7 +5,7 @@ unit mainform;
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interface
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uses
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Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
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Classes, SysUtils, Math, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
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ComCtrls, ExtCtrls, Spin, fpimage, LCLType,
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IntfGraphics, GraphType, //Intf basic routines
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@ -19,13 +19,16 @@ type
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{ TForm1 }
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TForm1 = class(TForm)
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CheckBox_Rect: TCheckBox;
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CheckBox_SingleLine: TRadioButton;
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CheckBox_Para: TRadioButton;
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CheckBox_Rot: TRadioButton;
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Label1: TLabel;
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LAngle: TLabel;
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LFontSize: TLabel;
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Panel_Option: TPanel;
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SpinEdit_Zoom: TSpinEdit;
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TrackBar_Size: TTrackBar;
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procedure CheckBox_RectChange(Sender: TObject);
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procedure CheckBox_SingleLineChange(Sender: TObject);
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procedure FormCreate(Sender: TObject);
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procedure FormDestroy(Sender: TObject);
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procedure FormMouseMove(Sender: TObject; Shift: TShiftState; X, Y: Integer);
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@ -35,11 +38,14 @@ type
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procedure TrackBar_SizeChange(Sender: TObject);
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private
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procedure UpdateSizeLabel;
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procedure UpdateAngleLabel;
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public
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lazimg: TLazIntfImage;
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drawer: TIntfFreeTypeDrawer;
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ftFont1,ftFont2,ftFont3: TFreeTypeFont;
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mx,my: integer; //mouse position
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fSin,fCos: double;
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fAngle: double;
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procedure EraseBackground(DC: HDC); override;
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procedure SetupFonts;
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end;
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@ -125,8 +131,9 @@ begin
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ftFont3 := nil;
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end;
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procedure TForm1.CheckBox_RectChange(Sender: TObject);
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procedure TForm1.CheckBox_SingleLineChange(Sender: TObject);
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begin
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LAngle.Enabled := CheckBox_Rot.Checked;
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invalidate;
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end;
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@ -143,6 +150,14 @@ procedure TForm1.FormMouseMove(Sender: TObject; Shift: TShiftState; X,Y: Integer
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begin
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mx := X;
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my := Y;
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if CheckBox_Rot.Checked then
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begin
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fAngle := ArcTan2(Panel_Option.Top/2 - my, mx - ClientWidth/2);
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SinCos(fAngle, fSin, fCos);
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fAngle := RadToDeg(fAngle);
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if fAngle<0 then fAngle += 360;
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UpdateAngleLabel;
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end;
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invalidate;
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end;
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@ -154,15 +169,28 @@ begin
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if ftFont3 <> nil then ftFont3.SizeInPoints := TrackBar_Size.Position;
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end;
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procedure TForm1.UpdateAngleLabel;
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begin
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LAngle.Caption := format('%3.0fº',[fAngle]);
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end;
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procedure TForm1.FormPaint(Sender: TObject);
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const testtext = 'The'#13#10'quick brown fox jumps over the lazy dog';
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var bmp: TBitmap;
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tx,ty: integer;
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p: array of TCharPosition;
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x,y: single;
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x,y,h,rx,ry: single;
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i: integer;
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StartTime,EndTime,EndTime2: TDateTime;
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zoom: integer;
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Orientation: Integer;
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procedure Rotate(dx,dy:single);
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begin
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rx := tx/2 + (fCos*dx - fSin*dy);
|
||||
ry := ty/2 - (fSin*dx + fCos*dy);
|
||||
end;
|
||||
|
||||
begin
|
||||
if lazimg = nil then exit;
|
||||
canvas.Font.Name := 'Comic Sans MS';
|
||||
@ -170,6 +198,11 @@ begin
|
||||
zoom := SpinEdit_Zoom.Value;
|
||||
StartTime := Now;
|
||||
|
||||
if not CheckBox_Rot.Checked then
|
||||
Orientation := 0
|
||||
else
|
||||
Orientation := round(fAngle*10);
|
||||
|
||||
tx := ClientWidth div zoom;
|
||||
ty := Panel_Option.Top div zoom;
|
||||
if (lazimg.Width <> tx) or (lazimg.Height <> ty) then
|
||||
@ -179,17 +212,31 @@ begin
|
||||
|
||||
x := mx/zoom;
|
||||
y := my/zoom;
|
||||
if CheckBox_Rot.Checked then
|
||||
begin
|
||||
h := 0.0;
|
||||
if ftFont1<>nil then h += ftFont1.LineFullHeight;
|
||||
if ftFont2<>nil then h += ftFont2.LineFullHeight;
|
||||
if ftFont3<>nil then h += ftFont3.LineFullHeight;
|
||||
h := h / 2;
|
||||
end;
|
||||
|
||||
if ftFont1<>nil then
|
||||
begin
|
||||
ftFont1.Hinted := true;
|
||||
ftFont1.ClearType := true;
|
||||
ftFont1.ClearType := not CheckBox_Rot.Checked; // ClearType and rotation is not working yet
|
||||
ftFont1.Quality := grqHighQuality;
|
||||
ftFont1.SmallLinePadding := false;
|
||||
if CheckBox_Rect.Checked then
|
||||
ftFont1.Orientation := Orientation;
|
||||
if CheckBox_Para.Checked then
|
||||
drawer.DrawTextRect(testtext, ftFont1, 0,0, tx/3,ty, colBlack, [ftaLeft, ftaBottom])
|
||||
else
|
||||
drawer.DrawText(ftFont1.Information[ftiFullName], ftFont1, x, y, colBlack, [ftaRight, ftaBottom]);
|
||||
else if CheckBox_SingleLine.Checked then
|
||||
drawer.DrawText(ftFont1.Information[ftiFullName], ftFont1, x, y, colBlack, [ftaRight, ftaBottom])
|
||||
else begin
|
||||
Rotate( -ftFont1.TextWidth(ftFont1.Information[ftiFullName])/2,
|
||||
h - ftFont1.LineFullHeight);
|
||||
drawer.DrawText(ftFont1.Information[ftiFullName], ftFont1, rx, ry, colBlack);
|
||||
end;
|
||||
end;
|
||||
|
||||
if ftFont2<>nil then
|
||||
@ -197,23 +244,34 @@ begin
|
||||
ftFont2.Hinted := false;
|
||||
ftFont2.ClearType := false;
|
||||
ftFont2.Quality := grqHighQuality;
|
||||
if CheckBox_Rect.Checked then
|
||||
ftFont2.Orientation := Orientation;
|
||||
if CheckBox_Para.Checked then
|
||||
drawer.DrawTextRect(testtext, ftFont2, tx/3,0, 2*tx/3,ty, colRed, [ftaCenter, ftaVerticalCenter])
|
||||
else
|
||||
drawer.DrawText(ftFont2.Information[ftiFullName], ftFont2, x, y, colRed, 192, [ftaCenter, ftaBaseline]);
|
||||
else if CheckBox_SingleLine.Checked then
|
||||
drawer.DrawText(ftFont2.Information[ftiFullName], ftFont2, x, y, colRed, 192, [ftaCenter, ftaBaseline])
|
||||
else begin
|
||||
Rotate( -ftFont2.TextWidth(ftFont2.Information[ftiFullName])/2,
|
||||
-ftFont2.LineFullHeight/2);
|
||||
drawer.DrawText(ftFont2.Information[ftiFullName], ftFont2, rx, ry, colRed);
|
||||
end;
|
||||
end;
|
||||
|
||||
if ftFont3<>nil then begin
|
||||
ftFont3.Hinted := false;
|
||||
ftFont3.ClearType := false;
|
||||
ftFont3.Quality := grqMonochrome;
|
||||
if CheckBox_Rect.Checked then
|
||||
ftFont3.Orientation := Orientation;
|
||||
if CheckBox_Para.Checked then
|
||||
drawer.DrawTextRect(testtext, ftFont3, 2*tx/3,0, tx,ty, colBlue, [ftaRight, ftaTop])
|
||||
else
|
||||
drawer.DrawText(ftFont3.Information[ftiFullName]+' '+ftFont3.VersionNumber, ftFont3, x, y, colBlack, 128, [ftaLeft, ftaTop]);
|
||||
else if CheckBox_SingleLine.Checked then
|
||||
drawer.DrawText(ftFont3.Information[ftiFullName]+' '+ftFont3.VersionNumber, ftFont3, x, y, colBlack, 128, [ftaLeft, ftaTop])
|
||||
else begin
|
||||
Rotate( -ftFont3.TextWidth(ftFont3.Information[ftiFullName])/2, - h );
|
||||
drawer.DrawText(ftFont3.Information[ftiFullName], ftFont3, rx, ry, colBlue);
|
||||
end;
|
||||
end;
|
||||
|
||||
if (ftFont1<>nil) and not CheckBox_Rect.Checked then
|
||||
if (ftFont1<>nil) and CheckBox_SingleLine.Checked then
|
||||
begin
|
||||
p := ftFont1.CharsPosition(ftFont1.Information[ftiFullName],[ftaRight, ftaBottom]);
|
||||
for i := 0 to high(p) do
|
||||
@ -233,7 +291,11 @@ begin
|
||||
EndTime2 := Now;
|
||||
|
||||
Canvas.TextOut(0,0, inttostr(round((EndTime-StartTime)*24*60*60*1000))+' ms + '+inttostr(round((EndTime2-EndTime)*24*60*60*1000))+' ms');
|
||||
|
||||
if CheckBox_Rot.Checked then
|
||||
begin
|
||||
Canvas.Pen.Color := clFuchsia;
|
||||
Canvas.Line(ClientWidth div 2, Panel_Option.Top div 2, mx, my);
|
||||
end;
|
||||
end;
|
||||
|
||||
procedure TForm1.FormShow(Sender: TObject);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user