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-rw-r--r--src/base/UFont.pas440
1 files changed, 257 insertions, 183 deletions
diff --git a/src/base/UFont.pas b/src/base/UFont.pas
index a72bca21..72409ac1 100644
--- a/src/base/UFont.pas
+++ b/src/base/UFont.pas
@@ -47,12 +47,14 @@ uses
glext,
glu,
sdl,
+ Math,
+ Classes,
+ SysUtils,
+ UUnicodeUtils,
{$IFDEF BITMAP_FONT}
UTexture,
{$ENDIF}
- Math,
- Classes,
- SysUtils;
+ UPath;
type
@@ -60,7 +62,7 @@ type
TGLubyteArray = array[0 .. (MaxInt div SizeOf(GLubyte))-1] of GLubyte;
TGLubyteDynArray = array of GLubyte;
- TWideStringArray = array of WideString;
+ TUCS4StringArray = array of UCS4String;
TGLColor = packed record
case byte of
@@ -126,34 +128,34 @@ type
{**
* Splits lines in Text seperated by newline (char-code #13).
- * @param Text UTF-8 encoded string
- * @param Lines splitted WideString lines
+ * @param Text UCS-4 encoded string
+ * @param Lines splitted UCS4String lines
*}
- procedure SplitLines(const Text: UTF8String; var Lines: TWideStringArray);
+ procedure SplitLines(const Text: UCS4String; var Lines: TUCS4StringArray);
{**
- * Print an array of WideStrings. Each array-item is a line of text.
+ * Print an array of UCS4Strings. Each array-item is a line of text.
* Lines of text are seperated by the line-spacing.
* This is the base function for all text drawing.
*}
- procedure Print(const Text: TWideStringArray); overload; virtual;
+ procedure Print(const Text: TUCS4StringArray); overload; virtual;
{**
* Draws an underline.
*}
- procedure DrawUnderline(const Text: WideString); virtual;
+ procedure DrawUnderline(const Text: UCS4String); virtual;
{**
* Renders (one) line of text.
*}
- procedure Render(const Text: WideString); virtual; abstract;
+ procedure Render(const Text: UCS4String); virtual; abstract;
{**
* Returns the bounds of text-lines contained in Text.
* @param(Advance if true the right bound is set to the advance instead
* of the minimal right bound.)
*}
- function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; overload; virtual; abstract;
+ function BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl; overload; virtual; abstract;
{**
* Resets all user settings to default values.
@@ -188,9 +190,11 @@ type
{**
* Prints a text.
*}
+ procedure Print(const Text: UCS4String); overload;
+ {** UTF-16 version of @link(Print) }
procedure Print(const Text: WideString); overload;
{** UTF-8 version of @link(Print) }
- procedure Print(const Text: string); overload;
+ procedure Print(const Text: UTF8String); overload;
{**
* Calculates the bounding box (width and height) around Text.
@@ -203,6 +207,8 @@ type
* bigger than the text's width as it additionally contains the advance
* and glyph-spacing of the last character.
*}
+ function BBox(const Text: UCS4String; Advance: boolean = true): TBoundsDbl; overload;
+ {** UTF-16 version of @link(BBox) }
function BBox(const Text: WideString; Advance: boolean = true): TBoundsDbl; overload;
{** UTF-8 version of @link(BBox) }
function BBox(const Text: UTF8String; Advance: boolean = true): TBoundsDbl; overload;
@@ -249,9 +255,9 @@ type
/// Mipmap fonts (size[level+1] = size[level]/2)
fMipmapFonts: array[0..cMaxMipmapLevel] of TFont;
- procedure Render(const Text: WideString); override;
- procedure Print(const Text: TWideStringArray); override;
- function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;
+ procedure Render(const Text: UCS4String); override;
+ procedure Print(const Text: TUCS4StringArray); override;
+ function BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl; override;
{**
* Callback called for creation of each mipmap font.
@@ -322,7 +328,7 @@ type
{**
* Table for storage of max. 256 glyphs.
- * Used for the second cache level. Indexed by the LSB of the WideChar
+ * Used for the second cache level. Indexed by the LSB of the UCS4Char
* char-code.
*}
PGlyphTable = ^TGlyphTable;
@@ -332,7 +338,7 @@ type
* Cache for glyphs of a single font.
* The cached glyphs are stored inside a hash-list.
* Hashing is performed in two steps:
- * 1. the least significant byte (LSB) of the WideChar character code
+ * 1. the least significant byte (LSB) of the UCS4Char character code
* is removed (shr 8) and the result (we call it BaseCode here) looked up in
* the hash-list.
* 2. Each entry of the hash-list contains a table with max. 256 entries.
@@ -359,22 +365,22 @@ type
* Add glyph Glyph with char-code ch to the cache.
* @returns @true on success, @false otherwise
*}
- function AddGlyph(ch: WideChar; const Glyph: TGlyph): boolean;
+ function AddGlyph(ch: UCS4Char; const Glyph: TGlyph): boolean;
{**
* Removes the glyph with char-code ch from the cache.
*}
- procedure DeleteGlyph(ch: WideChar);
+ procedure DeleteGlyph(ch: UCS4Char);
{**
* Removes the glyph with char-code ch from the cache.
*}
- function GetGlyph(ch: WideChar): TGlyph;
+ function GetGlyph(ch: UCS4Char): TGlyph;
{**
* Checks if a glyph with char-code ch is cached.
*}
- function HasGlyph(ch: WideChar): boolean;
+ function HasGlyph(ch: UCS4Char): boolean;
{**
* Remove and free all cached glyphs. If KeepBaseSet is set to
@@ -408,13 +414,13 @@ type
* Retrieves a cached glyph with char-code ch from cache.
* If the glyph is not already cached, it is loaded with LoadGlyph().
*}
- function GetGlyph(ch: WideChar): TGlyph;
+ function GetGlyph(ch: UCS4Char): TGlyph;
{**
* Callback to create (load) a glyph with char-code ch.
* Implemented by subclasses.
*}
- function LoadGlyph(ch: WideChar): TGlyph; virtual; abstract;
+ function LoadGlyph(ch: UCS4Char): TGlyph; virtual; abstract;
public
constructor Create();
@@ -436,6 +442,7 @@ type
*}
TFTGlyph = class(TGlyph)
private
+ fCharCode: UCS4Char; //**< Char code
fCharIndex: FT_UInt; //**< Freetype specific char-index (<> char-code)
fDisplayList: GLuint; //**< Display-list ID
fTexture: GLuint; //**< Texture ID
@@ -458,7 +465,7 @@ type
* The bitmap must be 2* pixels wider and higher than the
* original glyph's bitmap with the latter centered in it.
*}
- procedure Extrude(var TexBuffer: TGLubyteDynArray; Outset: single);
+ procedure StrokeBorder(var Glyph: FT_Glyph);
{**
* Creates an OpenGL texture (and display list) for the glyph.
@@ -477,7 +484,7 @@ type
* Creates a glyph with char-code ch from font Font.
* @param LoadFlags flags passed to FT_Load_Glyph()
*}
- constructor Create(Font: TFTFont; ch: WideChar; Outset: single;
+ constructor Create(Font: TFTFont; ch: UCS4Char; Outset: single;
LoadFlags: FT_Int32);
destructor Destroy(); override;
@@ -490,6 +497,8 @@ type
property CharIndex: FT_UInt read fCharIndex;
end;
+ TFontPart = ( fpNone, fpInner, fpOutline );
+
{**
* Freetype font class.
*}
@@ -498,19 +507,20 @@ type
procedure ResetIntern();
protected
- fFilename: string; //**< filename of the font-file
+ fFilename: IPath; //**< filename of the font-file
fSize: integer; //**< Font base size (in pixels)
fOutset: single; //**< size of outset extrusion (in pixels)
fFace: FT_Face; //**< Holds the height of the font
fLoadFlags: FT_Int32; //**< FT glpyh load-flags
fFontUnitScale: TPositionDbl; //**< FT font-units to pixel ratio
fUseDisplayLists: boolean; //**< true: use display-lists, false: direct drawing
+ fPart: TFontPart; //**< indicates the part of an outline font
{** @seealso TCachedFont.LoadGlyph }
- function LoadGlyph(ch: WideChar): TGlyph; override;
+ function LoadGlyph(ch: UCS4Char): TGlyph; override;
- procedure Render(const Text: WideString); override;
- function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;
+ procedure Render(const Text: UCS4String); override;
+ function BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl; override;
function GetHeight(): single; override;
function GetAscender(): single; override;
@@ -528,7 +538,7 @@ type
* @param LoadFlags flags passed to FT_Load_Glyph()
* @raises Exception if the font-file could not be loaded
*}
- constructor Create(const Filename: string;
+ constructor Create(const Filename: IPath;
Size: integer; Outset: single = 0.0;
LoadFlags: FT_Int32 = FT_LOAD_DEFAULT);
@@ -558,7 +568,7 @@ type
* The extrusion in pixels is Size*OutsetAmount
* (0.0 -> no extrusion, 0.1 -> 10%).
*}
- constructor Create(const Filename: string;
+ constructor Create(const Filename: IPath;
Size: integer; OutsetAmount: single = 0.0;
UseMipmaps: boolean = true);
@@ -576,7 +586,7 @@ type
*}
TFTOutlineFont = class(TFont)
private
- fFilename: string;
+ fFilename: IPath;
fSize: integer;
fOutset: single;
fInnerFont, fOutlineFont: TFTFont;
@@ -585,9 +595,9 @@ type
procedure ResetIntern();
protected
- procedure DrawUnderline(const Text: WideString); override;
- procedure Render(const Text: WideString); override;
- function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;
+ procedure DrawUnderline(const Text: UCS4String); override;
+ procedure Render(const Text: UCS4String); override;
+ function BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl; override;
function GetHeight(): single; override;
function GetAscender(): single; override;
@@ -603,7 +613,7 @@ type
procedure SetReflectionPass(Enable: boolean); override;
public
- constructor Create(const Filename: string;
+ constructor Create(const Filename: IPath;
Size: integer; Outset: single;
LoadFlags: FT_Int32 = FT_LOAD_DEFAULT);
destructor Destroy; override;
@@ -637,7 +647,7 @@ type
function CreateMipmap(Level: integer; Scale: single): TFont; override;
public
- constructor Create(const Filename: string;
+ constructor Create(const Filename: IPath;
Size: integer; OutsetAmount: single;
UseMipmaps: boolean = true);
@@ -672,18 +682,18 @@ type
procedure ResetIntern();
- procedure RenderChar(ch: WideChar; var AdvanceX: real);
+ procedure RenderChar(ch: UCS4Char; var AdvanceX: real);
{**
* Load font widths from an info file.
* @param InfoFile the name of the info (.dat) file
* @raises Exception if the file is corrupted
*}
- procedure LoadFontInfo(const InfoFile: string);
+ procedure LoadFontInfo(const InfoFile: IPath);
protected
- procedure Render(const Text: WideString); override;
- function BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl; override;
+ procedure Render(const Text: UCS4String); override;
+ function BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl; override;
function GetHeight(): single; override;
function GetAscender(): single; override;
@@ -699,7 +709,7 @@ type
* (y-axis up) and from the lower edge of the glyphs bounding box)
* @param(Ascender pixels from baseline to top of highest glyph)
*}
- constructor Create(const Filename: string; Outline: integer;
+ constructor Create(const Filename: IPath; Outline: integer;
Baseline, Ascender, Descender: integer);
destructor Destroy(); override;
@@ -801,37 +811,61 @@ begin
ResetIntern();
end;
-procedure TFont.SplitLines(const Text: UTF8String; var Lines: TWideStringArray);
+procedure TFont.SplitLines(const Text: UCS4String; var Lines: TUCS4StringArray);
var
- LineList: TStringList;
- LineIndex: integer;
+ CharIndex: integer;
+ LineStart: integer;
+ LineLength: integer;
+ EOT: boolean; // End-Of-Text
begin
- // split lines on newline (there is no WideString version of ExtractStrings)
- LineList := TStringList.Create();
- ExtractStrings([#13], [], PChar(Text), LineList);
+ // split lines on newline
+ SetLength(Lines, 0);
+ EOT := false;
+ LineStart := 0;
+
+ for CharIndex := 0 to High(Text) do
+ begin
+ // check for end of text (UCS4Strings are zero-terminated)
+ if (CharIndex = High(Text)) then
+ EOT := true;
+
+ // check for newline (carriage return (#13)) or end of text
+ if (Text[CharIndex] = 13) or EOT then
+ begin
+ LineLength := CharIndex - LineStart;
+ // check if last character was a newline
+ if (EOT and (LineLength = 0)) then
+ Break;
- // create an array of WideStrins from the UTF-8 string-list
- SetLength(Lines, LineList.Count);
- for LineIndex := 0 to LineList.Count-1 do
- Lines[LineIndex] := UTF8Decode(LineList[LineIndex]);
- LineList.Free();
+ // copy line (even if LineLength is 0)
+ SetLength(Lines, Length(Lines)+1);
+ Lines[High(Lines)] := UCS4Copy(Text, LineStart, LineLength);
+
+ LineStart := CharIndex+1;
+ end;
+ end;
end;
-function TFont.BBox(const Text: UTF8String; Advance: boolean): TBoundsDbl;
+function TFont.BBox(const Text: UCS4String; Advance: boolean): TBoundsDbl;
var
- LineArray: TWideStringArray;
+ LineArray: TUCS4StringArray;
begin
SplitLines(Text, LineArray);
Result := BBox(LineArray, Advance);
SetLength(LineArray, 0);
end;
+function TFont.BBox(const Text: UTF8String; Advance: boolean): TBoundsDbl;
+begin
+ Result := BBox(UTF8Decode(Text), Advance);
+end;
+
function TFont.BBox(const Text: WideString; Advance: boolean): TBoundsDbl;
begin
- Result := BBox(UTF8Encode(Text), Advance);
+ Result := BBox(WideStringToUCS4String(Text), Advance);
end;
-procedure TFont.Print(const Text: TWideStringArray);
+procedure TFont.Print(const Text: TUCS4StringArray);
var
LineIndex: integer;
begin
@@ -912,21 +946,26 @@ begin
glPopAttrib();
end;
-procedure TFont.Print(const Text: string);
+procedure TFont.Print(const Text: UCS4String);
var
- LineArray: TWideStringArray;
+ LineArray: TUCS4StringArray;
begin
SplitLines(Text, LineArray);
Print(LineArray);
SetLength(LineArray, 0);
end;
+procedure TFont.Print(const Text: UTF8String);
+begin
+ Print(UTF8Decode(Text));
+end;
+
procedure TFont.Print(const Text: WideString);
begin
- Print(UTF8Encode(Text));
+ Print(WideStringToUCS4String(Text));
end;
-procedure TFont.DrawUnderline(const Text: WideString);
+procedure TFont.DrawUnderline(const Text: UCS4String);
var
UnderlineY1, UnderlineY2: single;
Bounds: TBoundsDbl;
@@ -1194,7 +1233,7 @@ begin
glScalef(MipmapScale, MipmapScale, 0);
end;
-procedure TScalableFont.Print(const Text: TWideStringArray);
+procedure TScalableFont.Print(const Text: TUCS4StringArray);
begin
glPushMatrix();
@@ -1210,12 +1249,12 @@ begin
glPopMatrix();
end;
-procedure TScalableFont.Render(const Text: WideString);
+procedure TScalableFont.Render(const Text: UCS4String);
begin
Assert(false, 'Unused TScalableFont.Render() was called');
end;
-function TScalableFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;
+function TScalableFont.BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl;
begin
Result := fBaseFont.BBox(Text, Advance);
Result.Left := Result.Left * fScale * fAspect;
@@ -1346,7 +1385,7 @@ begin
inherited;
end;
-function TCachedFont.GetGlyph(ch: WideChar): TGlyph;
+function TCachedFont.GetGlyph(ch: UCS4Char): TGlyph;
begin
Result := fCache.GetGlyph(ch);
if (Result = nil) then
@@ -1368,11 +1407,11 @@ end;
*}
constructor TFTFont.Create(
- const Filename: string;
+ const Filename: IPath;
Size: integer; Outset: single;
LoadFlags: FT_Int32);
var
- i: WideChar;
+ ch: UCS4Char;
begin
inherited Create();
@@ -1381,10 +1420,11 @@ begin
fOutset := Outset;
fLoadFlags := LoadFlags;
fUseDisplayLists := true;
+ fPart := fpNone;
// load font information
- if (FT_New_Face(TFreeType.GetLibrary(), PChar(Filename), 0, fFace) <> 0) then
- raise Exception.Create('FT_New_Face: Could not load font ''' + Filename + '''');
+ if (FT_New_Face(TFreeType.GetLibrary(), PChar(Filename.ToNative), 0, fFace) <> 0) then
+ raise Exception.Create('FT_New_Face: Could not load font ''' + Filename.ToNative + '''');
// support scalable fonts only
if (not FT_IS_SCALABLE(fFace)) then
@@ -1400,8 +1440,8 @@ begin
ResetIntern();
// pre-cache some commonly used glyphs (' ' - '~')
- for i := #32 to #126 do
- fCache.AddGlyph(i, TFTGlyph.Create(Self, i, Outset, LoadFlags));
+ for ch := 32 to 126 do
+ fCache.AddGlyph(ch, TFTGlyph.Create(Self, ch, Outset, LoadFlags));
end;
destructor TFTFont.Destroy();
@@ -1424,15 +1464,15 @@ begin
ResetIntern();
end;
-function TFTFont.LoadGlyph(ch: WideChar): TGlyph;
+function TFTFont.LoadGlyph(ch: UCS4Char): TGlyph;
begin
Result := TFTGlyph.Create(Self, ch, Outset, fLoadFlags);
end;
-function TFTFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;
+function TFTFont.BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl;
var
Glyph, PrevGlyph: TFTGlyph;
- TextLine: WideString;
+ TextLine: UCS4String;
LineYOffset: single;
LineIndex, CharIndex: integer;
LineBounds: TBoundsDbl;
@@ -1462,7 +1502,7 @@ begin
LineBounds.Top := 0;
// for each glyph image, compute its bounding box
- for CharIndex := 1 to Length(TextLine) do
+ for CharIndex := 0 to LengthUCS4(TextLine)-1 do
begin
Glyph := TFTGlyph(GetGlyph(TextLine[CharIndex]));
if (Glyph <> nil) then
@@ -1480,9 +1520,9 @@ begin
LineBounds.Left := LineBounds.Right + Glyph.Bounds.Left;
// update right bound
- if (CharIndex < Length(TextLine)) or // not the last character
- (TextLine[CharIndex] = ' ') or // on space char (Bounds.Right = 0)
- Advance then // or in advance mode
+ if (CharIndex < LengthUCS4(TextLine)-1) or // not the last character
+ (TextLine[CharIndex] = Ord(' ')) or // on space char (Bounds.Right = 0)
+ Advance then // or in advance mode
begin
// add advance and glyph spacing
LineBounds.Right := LineBounds.Right + Glyph.Advance.x + GlyphSpacing
@@ -1534,13 +1574,13 @@ begin
end;
// if left or bottom bound was not set, set them to 0
- if (Result.Left = Infinity) then
+ if (IsInfinite(Result.Left)) then
Result.Left := 0.0;
- if (Result.Bottom = Infinity) then
+ if (IsInfinite(Result.Bottom)) then
Result.Bottom := 0.0;
end;
-procedure TFTFont.Render(const Text: WideString);
+procedure TFTFont.Render(const Text: UCS4String);
var
CharIndex: integer;
Glyph, PrevGlyph: TFTGlyph;
@@ -1550,7 +1590,7 @@ begin
PrevGlyph := nil;
// draw current line
- for CharIndex := 1 to Length(Text) do
+ for CharIndex := 0 to LengthUCS4(Text)-1 do
begin
Glyph := TFTGlyph(GetGlyph(Text[CharIndex]));
if (Assigned(Glyph)) then
@@ -1606,7 +1646,7 @@ end;
* TFTScalableFont
*}
-constructor TFTScalableFont.Create(const Filename: string;
+constructor TFTScalableFont.Create(const Filename: IPath;
Size: integer; OutsetAmount: single;
UseMipmaps: boolean);
var
@@ -1662,7 +1702,7 @@ end;
*}
constructor TFTOutlineFont.Create(
- const Filename: string;
+ const Filename: IPath;
Size: integer; Outset: single;
LoadFlags: FT_Int32);
begin
@@ -1673,7 +1713,9 @@ begin
fOutset := Outset;
fInnerFont := TFTFont.Create(Filename, Size, 0.0, LoadFlags);
+ fInnerFont.fPart := fpInner;
fOutlineFont := TFTFont.Create(Filename, Size, Outset, LoadFlags);
+ fOutlineFont.fPart := fpOutline;
ResetIntern();
end;
@@ -1705,7 +1747,7 @@ begin
ResetIntern();
end;
-procedure TFTOutlineFont.DrawUnderline(const Text: WideString);
+procedure TFTOutlineFont.DrawUnderline(const Text: UCS4String);
var
CurrentColor: TGLColor;
OutlineColor: TGLColor;
@@ -1730,7 +1772,7 @@ begin
glPopMatrix();
end;
-procedure TFTOutlineFont.Render(const Text: WideString);
+procedure TFTOutlineFont.Render(const Text: UCS4String);
var
CurrentColor: TGLColor;
OutlineColor: TGLColor;
@@ -1770,7 +1812,7 @@ begin
fInnerFont.FlushCache(KeepBaseSet);
end;
-function TFTOutlineFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;
+function TFTOutlineFont.BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl;
begin
Result := fOutlineFont.BBox(Text, Advance);
end;
@@ -1852,7 +1894,7 @@ end;
*}
constructor TFTScalableOutlineFont.Create(
- const Filename: string;
+ const Filename: IPath;
Size: integer; OutsetAmount: single;
UseMipmaps: boolean);
var
@@ -1935,82 +1977,113 @@ const
*}
cTexSmoothBorder = 1;
-procedure TFTGlyph.Extrude(var TexBuffer: TGLubyteDynArray; Outset: single);
+procedure TFTGlyph.StrokeBorder(var Glyph: FT_Glyph);
+var
+ Outline: PFT_Outline;
+ OuterStroker, InnerStroker: FT_Stroker;
+ OuterNumPoints, InnerNumPoints, GlyphNumPoints: FT_UInt;
+ OuterNumContours, InnerNumContours, GlyphNumContours: FT_UInt;
+ OuterBorder, InnerBorder: FT_StrokerBorder;
+ OutlineFlags: FT_Int;
+ UseStencil: boolean;
+begin
+ // It is possible to extrude the borders of a glyph with FT_Glyph_Stroke
+ // but it will extrude the border to the outside and the inside of a glyph
+ // although we just want to extrude to the outside.
+ // FT_Glyph_StrokeBorder extrudes to the outside but also fills the interior
+ // (this is what we need for bold fonts).
+ // In both cases the inner font and outline font (border) will overlap.
+ // Normally this does not matter but it does if alpha blending is active.
+ // In this case if e.g. the inner color is set to white, the outline to red
+ // and alpha to 0.5 the inner part will not be white it will be pink.
+
+ InnerStroker := nil;
+ OuterStroker := nil;
+
+ // If we are to create the interior of an outlined font (fInner = true)
+ // we have to create two borders:
+ // - one extruded to the outside by fOutset pixels and
+ // - one extruded to the inside by almost 0 zero pixels.
+ // The second one is used as a stencil for the first one, clearing the
+ // interiour of the glyph.
+ // The stencil is not needed to create bold fonts.
+ UseStencil := (fFont.fPart = fpInner);
+
+ Outline := @FT_OutlineGlyph(Glyph).outline;
+
+ OuterBorder := FT_Outline_GetOutsideBorder(Outline);
+ if (OuterBorder = FT_STROKER_BORDER_LEFT) then
+ InnerBorder := FT_STROKER_BORDER_RIGHT
+ else
+ InnerBorder := FT_STROKER_BORDER_LEFT;
+
+ { extrude outer border }
+
+ if (FT_Stroker_New(Glyph.library_, OuterStroker) <> 0) then
+ raise Exception.Create('FT_Stroker_New failed!');
+ FT_Stroker_Set(
+ OuterStroker,
+ Round(fOutset * 64),
+ FT_STROKER_LINECAP_ROUND,
+ FT_STROKER_LINEJOIN_BEVEL,
+ 0);
+
+ // similar to FT_Glyph_StrokeBorder(inner = FT_FALSE) but it is possible to
+ // use FT_Stroker_ExportBorder() afterwards to combine inner and outer borders
+ if (FT_Stroker_ParseOutline(OuterStroker, Outline, FT_FALSE) <> 0) then
+ raise Exception.Create('FT_Stroker_ParseOutline failed!');
- procedure SetToMax(var Val1: GLubyte; Val2: GLubyte); {$IFDEF HasInline}inline;{$ENDIF}
+ FT_Stroker_GetBorderCounts(OuterStroker, OuterBorder, OuterNumPoints, OuterNumContours);
+
+ { extrude inner border (= stencil) }
+
+ if (UseStencil) then
begin
- if (Val1 < Val2) then
- Val1 := Val2;
+ if (FT_Stroker_New(Glyph.library_, InnerStroker) <> 0) then
+ raise Exception.Create('FT_Stroker_New failed!');
+ FT_Stroker_Set(
+ InnerStroker,
+ 63, // extrude at most one pixel to avoid a black border
+ FT_STROKER_LINECAP_ROUND,
+ FT_STROKER_LINEJOIN_BEVEL,
+ 0);
+
+ if (FT_Stroker_ParseOutline(InnerStroker, Outline, FT_FALSE) <> 0) then
+ raise Exception.Create('FT_Stroker_ParseOutline failed!');
+
+ FT_Stroker_GetBorderCounts(InnerStroker, InnerBorder, InnerNumPoints, InnerNumContours);
+ end else begin
+ InnerNumPoints := 0;
+ InnerNumContours := 0;
end;
-var
- I, X, Y: integer;
- SrcBuffer,TmpBuffer: TGLubyteDynArray;
- TexLine, TexLinePrev, TexLineNext: PGLubyteArray;
- SrcLine: PGLubyteArray;
- AlphaScale: single;
- Value, ValueNeigh, ValueDiag: GLubyte;
-const
- // square-root of 2 used for diagonal neighbor pixels
- cSqrt2 = 1.4142;
- // number of ignored pixels on each edge of the bitmap. Consists of:
- // - border used for font smoothing and
- // - outer (extruded) bitmap pixel (because it is just written but never read)
- cBorder = cTexSmoothBorder + 1;
-begin
- // allocate memory for temporary buffer
- SetLength(SrcBuffer, Length(TexBuffer));
- FillChar(SrcBuffer[0], Length(TexBuffer), 0);
-
- // extrude pixel by pixel
- for I := 1 to Ceil(Outset) do
- begin
- // swap arrays
- TmpBuffer := TexBuffer;
- TexBuffer := SrcBuffer;
- SrcBuffer := TmpBuffer;
-
- // as long as we add an entire pixel of outset, use a solid color.
- // If the fractional part is reached blend, e.g. outline=3.2 -> 3 solid
- // pixels and one blended with alpha=0.2.
- // For the fractional part I = Ceil(Outset) is always true.
- if (I <= Outset) then
- AlphaScale := 1
- else
- AlphaScale := Outset - Trunc(Outset);
-
- // copy data to the expanded bitmap.
- for Y := cBorder to fTexSize.Height - 2*cBorder do
- begin
- TexLine := @TexBuffer[Y*fTexSize.Width];
- TexLinePrev := @TexBuffer[(Y-1)*fTexSize.Width];
- TexLineNext := @TexBuffer[(Y+1)*fTexSize.Width];
- SrcLine := @SrcBuffer[Y*fTexSize.Width];
+ { combine borders (subtract: OuterBorder - InnerBorder) }
- // expand current line's pixels
- for X := cBorder to fTexSize.Width - 2*cBorder do
- begin
- Value := SrcLine[X];
- ValueNeigh := Round(Value * AlphaScale);
- ValueDiag := Round(ValueNeigh / cSqrt2);
+ GlyphNumPoints := InnerNumPoints + OuterNumPoints;
+ GlyphNumContours := InnerNumContours + OuterNumContours;
- SetToMax(TexLine[X], Value);
- SetToMax(TexLine[X-1], ValueNeigh);
- SetToMax(TexLine[X+1], ValueNeigh);
+ // save flags before deletion (TODO: set them on the resulting outline)
+ OutlineFlags := Outline.flags;
- SetToMax(TexLinePrev[X], ValueNeigh);
- SetToMax(TexLinePrev[X-1], ValueDiag);
- SetToMax(TexLinePrev[X+1], ValueDiag);
+ // resize glyph outline to hold inner and outer border
+ FT_Outline_Done(Glyph.Library_, Outline);
+ if (FT_Outline_New(Glyph.Library_, GlyphNumPoints, GlyphNumContours, Outline) <> 0) then
+ raise Exception.Create('FT_Outline_New failed!');
- SetToMax(TexLineNext[X], ValueNeigh);
- SetToMax(TexLineNext[X-1], ValueDiag);
- SetToMax(TexLineNext[X+1], ValueDiag);
- end;
- end;
- end;
+ Outline.n_points := 0;
+ Outline.n_contours := 0;
- TmpBuffer := nil;
- SetLength(SrcBuffer, 0);
+ // add points to outline. The inner-border is used as a stencil.
+ FT_Stroker_ExportBorder(OuterStroker, OuterBorder, Outline);
+ if (UseStencil) then
+ FT_Stroker_ExportBorder(InnerStroker, InnerBorder, Outline);
+ if (FT_Outline_Check(outline) <> 0) then
+ raise Exception.Create('FT_Stroker_ExportBorder failed!');
+
+ if (InnerStroker <> nil) then
+ FT_Stroker_Done(InnerStroker);
+ if (OuterStroker <> nil) then
+ FT_Stroker_Done(OuterStroker);
end;
procedure TFTGlyph.CreateTexture(LoadFlags: FT_Int32);
@@ -2033,6 +2106,9 @@ begin
if (FT_Get_Glyph(fFont.Face^.glyph, Glyph) <> 0) then
raise Exception.Create('FT_Get_Glyph failed');
+ if (fOutset > 0) then
+ StrokeBorder(Glyph);
+
// store scaled advance width/height in glyph-object
fAdvance.X := fFont.Face^.glyph^.advance.x / 64 + fOutset*2;
fAdvance.Y := fFont.Face^.glyph^.advance.y / 64 + fOutset*2;
@@ -2114,9 +2190,6 @@ begin
end;
end;
- if (fOutset > 0) then
- Extrude(TexBuffer, fOutset);
-
// allocate resources for textures and display lists
glGenTextures(1, @fTexture);
@@ -2151,13 +2224,14 @@ begin
FT_Done_Glyph(Glyph);
end;
-constructor TFTGlyph.Create(Font: TFTFont; ch: WideChar; Outset: single;
+constructor TFTGlyph.Create(Font: TFTFont; ch: UCS4Char; Outset: single;
LoadFlags: FT_Int32);
begin
inherited Create();
fFont := Font;
fOutset := Outset;
+ fCharCode := ch;
// get the Freetype char-index (use default UNICODE charmap)
fCharIndex := FT_Get_Char_Index(Font.fFace, FT_ULONG(ch));
@@ -2336,7 +2410,7 @@ begin
InsertPos := fHash.Count;
end;
-function TGlyphCache.AddGlyph(ch: WideChar; const Glyph: TGlyph): boolean;
+function TGlyphCache.AddGlyph(ch: UCS4Char; const Glyph: TGlyph): boolean;
var
BaseCode: cardinal;
GlyphCode: integer;
@@ -2346,7 +2420,7 @@ var
begin
Result := false;
- BaseCode := cardinal(ch) shr 8;
+ BaseCode := Ord(ch) shr 8;
GlyphTable := FindGlyphTable(BaseCode, InsertPos);
if (GlyphTable = nil) then
begin
@@ -2356,7 +2430,7 @@ begin
end;
// get glyph table offset
- GlyphCode := cardinal(ch) and $FF;
+ GlyphCode := Ord(ch) and $FF;
// insert glyph into table if not present
if (GlyphTable[GlyphCode] = nil) then
begin
@@ -2365,19 +2439,19 @@ begin
end;
end;
-procedure TGlyphCache.DeleteGlyph(ch: WideChar);
+procedure TGlyphCache.DeleteGlyph(ch: UCS4Char);
var
Table: PGlyphTable;
TableIndex, GlyphIndex: integer;
TableEmpty: boolean;
begin
// find table
- Table := FindGlyphTable(cardinal(ch) shr 8, TableIndex);
+ Table := FindGlyphTable(Ord(ch) shr 8, TableIndex);
if (Table = nil) then
Exit;
// find glyph
- GlyphIndex := cardinal(ch) and $FF;
+ GlyphIndex := Ord(ch) and $FF;
if (Table[GlyphIndex] <> nil) then
begin
// destroy glyph
@@ -2402,19 +2476,19 @@ begin
end;
end;
-function TGlyphCache.GetGlyph(ch: WideChar): TGlyph;
+function TGlyphCache.GetGlyph(ch: UCS4Char): TGlyph;
var
InsertPos: integer;
Table: PGlyphTable;
begin
- Table := FindGlyphTable(cardinal(ch) shr 8, InsertPos);
+ Table := FindGlyphTable(Ord(ch) shr 8, InsertPos);
if (Table = nil) then
Result := nil
else
- Result := Table[cardinal(ch) and $FF];
+ Result := Table[Ord(ch) and $FF];
end;
-function TGlyphCache.HasGlyph(ch: WideChar): boolean;
+function TGlyphCache.HasGlyph(ch: UCS4Char): boolean;
begin
Result := (GetGlyph(ch) <> nil);
end;
@@ -2482,7 +2556,7 @@ end;
* TBitmapFont
*}
-constructor TBitmapFont.Create(const Filename: string; Outline: integer;
+constructor TBitmapFont.Create(const Filename: IPath; Outline: integer;
Baseline, Ascender, Descender: integer);
begin
inherited Create();
@@ -2494,7 +2568,7 @@ begin
fAscender := Ascender;
fDescender := Descender;
- LoadFontInfo(ChangeFileExt(Filename, '.dat'));
+ LoadFontInfo(Filename.SetExtension('.dat'));
ResetIntern();
end;
@@ -2524,27 +2598,27 @@ begin
fWidths[Count] := Round(fWidths[Count] * WidthMult) + WidthAdd;
end;
-procedure TBitmapFont.LoadFontInfo(const InfoFile: string);
+procedure TBitmapFont.LoadFontInfo(const InfoFile: IPath);
var
- Stream: TFileStream;
+ Stream: TStream;
begin
FillChar(fWidths[0], Length(fWidths), 0);
Stream := nil;
try
- Stream := TFileStream.Create(InfoFile, fmOpenRead);
+ Stream := TBinaryFileStream.Create(InfoFile, fmOpenRead);
Stream.Read(fWidths, 256);
except
- raise Exception.Create('Could not read font info file ''' + InfoFile + '''');
+ raise Exception.Create('Could not read font info file ''' + InfoFile.ToNative + '''');
end;
Stream.Free;
end;
-function TBitmapFont.BBox(const Text: TWideStringArray; Advance: boolean): TBoundsDbl;
+function TBitmapFont.BBox(const Text: TUCS4StringArray; Advance: boolean): TBoundsDbl;
var
LineIndex, CharIndex: integer;
CharCode: cardinal;
- Line: WideString;
+ Line: UCS4String;
LineWidth: double;
begin
Result.Left := 0;
@@ -2556,7 +2630,7 @@ begin
begin
Line := Text[LineIndex];
LineWidth := 0;
- for CharIndex := 1 to Length(Line) do
+ for CharIndex := 0 to LengthUCS4(Line)-1 do
begin
CharCode := Ord(Line[CharIndex]);
if (CharCode < Length(fWidths)) then
@@ -2567,7 +2641,7 @@ begin
end;
end;
-procedure TBitmapFont.RenderChar(ch: WideChar; var AdvanceX: real);
+procedure TBitmapFont.RenderChar(ch: UCS4Char; var AdvanceX: real);
var
TexX, TexY: real;
TexR, TexB: real;
@@ -2659,20 +2733,20 @@ begin
AdvanceX := AdvanceX + GlyphWidth;
end;
-procedure TBitmapFont.Render(const Text: WideString);
+procedure TBitmapFont.Render(const Text: UCS4String);
var
CharIndex: integer;
AdvanceX: real;
begin
// if there is no text do nothing
- if (Text = '') then
+ if (Text = nil) or (Text[0] = 0) then
Exit;
//Save the current color and alpha (for reflection)
glGetFloatv(GL_CURRENT_COLOR, @fTempColor);
AdvanceX := 0;
- for CharIndex := 1 to Length(Text) do
+ for CharIndex := 0 to LengthUCS4(Text)-1 do
begin
RenderChar(Text[CharIndex], AdvanceX);
end;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 01:42:44 +0000