paweld/lazarus-ccr
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implemented TGLUTBitmapFont

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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@2245 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This commit is contained in:
blaszijk 2012-01-11 16:26:02 +00:00
parent 443a4e2447
commit ee979d5b6e
2 changed files with 63 additions and 17 deletions
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3
components/nvidia-widgets/examples/widget_test.pp
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@ -5,7 +5,7 @@ program widget_test;
uses
Classes, SysUtils,
GLut, GL, GLu,
nvWidgets, nvGLWidgets, nvBaseFont, nvGlutWidgets, GLFreeTypeFont;
nvWidgets, nvGLWidgets, nvBaseFont, nvGlutWidgets, GLFreeTypeFont, GLUTBitmapFont;
var
ui: GlutUIContext;
@ -197,6 +197,7 @@ begin
ui := GlutUIContext.Create;
ui.Painter := GLUIPainter.Create;
ui.Painter.Font := TGLFreeTypeFont.Create('Ubuntu-R.ttf', 10);
//ui.Painter.Font := TGLUTBitmapFont.Create('fixed', 15);
if not ui.init(win_w, win_h) then
begin

77
components/nvidia-widgets/src/glut/glutbitmapfont.pas
View File

@ -5,7 +5,7 @@ unit GLUTBitmapFont;
interface
uses
Classes, SysUtils, GLut, nvBaseFont;
Classes, SysUtils, GL, GLut, nvBaseFont;
type
TFontStyles = record
@ -15,16 +15,18 @@ type
StrikeTrough: boolean;
Underline: boolean;
Font: pointer;
TextListBase: integer;
end;
{ TGLUTFreeTypeFont }
{ TGLUTBitmapFont }
TGLUTFreeTypeFont = class(TNVBaseFont)
TGLUTBitmapFont = class(TNVBaseFont)
private
FFontList: array of TFontStyles;
FCount: integer;
FActiveFont: integer;
procedure FindStylizedFont;
function InitializeFont(AFont: pointer): integer;
protected
procedure SetFlags(AIndex: integer; AValue: boolean); override;
public
@ -44,9 +46,9 @@ type
implementation
{ TGLUTFreeTypeFont }
{ TGLUTBitmapFont }
procedure TGLUTFreeTypeFont.FindStylizedFont;
procedure TGLUTBitmapFont.FindStylizedFont;
var
item: TFontStyles;
i: integer;
@ -71,14 +73,32 @@ begin
FActiveFont := 0;
end;
procedure TGLUTFreeTypeFont.SetFlags(AIndex: integer; AValue: boolean);
function TGLUTBitmapFont.InitializeFont(AFont: pointer): integer;
var
TextListBase: integer;
i: integer;
begin
//just doing 7-bit ascii
TextListBase := glGenLists(128);
for i := 0 to 127 do
begin
glNewList(TextListBase + i, GL_COMPILE);
glutBitmapCharacter(AFont, i);
glEndList;
end;
Result := TextListBase;
end;
procedure TGLUTBitmapFont.SetFlags(AIndex: integer; AValue: boolean);
begin
inherited SetFlags(AIndex, AValue);
FindStylizedFont;
end;
constructor TGLUTFreeTypeFont.Create(AName: string; ASize: integer);
constructor TGLUTBitmapFont.Create(AName: string; ASize: integer);
begin
inherited Create(AName, ASize);
@ -87,7 +107,7 @@ begin
FActiveFont := 0;
end;
destructor TGLUTFreeTypeFont.Destroy;
destructor TGLUTBitmapFont.Destroy;
var
i: integer;
begin
@ -97,38 +117,63 @@ begin
inherited Destroy;
end;
procedure TGLUTFreeTypeFont.Add(AName: string; ABold, AItalic, AStrikeTrough, AUnderline: boolean);
procedure TGLUTBitmapFont.Add(AName: string; ABold, AItalic, AStrikeTrough, AUnderline: boolean);
begin
Inc(FCount);
SetLength(FFontList, FCount);
with FFontList[FCount - 1] do
begin
//Font.Init(AName, Size);
case LowerCase(AName) of
'helvetica': case Size of
10: Font := GLUT_BITMAP_HELVETICA_10;
12: Font := GLUT_BITMAP_HELVETICA_12;
18: Font := GLUT_BITMAP_HELVETICA_18;
else
raise Exception.CreateFmt('GLUT font size %d does not exist for font %s', [Size, AName]);
end;
'times roman': case Size of
10: Font := GLUT_BITMAP_TIMES_ROMAN_10;
24: Font := GLUT_BITMAP_TIMES_ROMAN_24;
else
raise Exception.CreateFmt('GLUT font size %d does not exist for font %s', [Size, AName]);
end;
'fixed': case Size of
13: Font := GLUT_BITMAP_8_BY_13;
15: Font := GLUT_BITMAP_9_BY_15;
else
raise Exception.CreateFmt('GLUT font size %d does not exist for font %s', [Size, AName]);
end;
else
raise Exception.CreateFmt('GLUT font name not supported %s', [AName]);
end;
Name := AName;
Bold := ABold;
Italic := AItalic;
StrikeTrough := AStrikeTrough;
Underline := AUnderline;
TextListBase := InitializeFont(Font);
end;
FindStylizedFont;
end;
function TGLUTFreeTypeFont.TextHeight(Text: string): integer;
function TGLUTBitmapFont.TextHeight(Text: string): integer;
begin
Result := Size;
end;
function TGLUTFreeTypeFont.TextWidth(Text: string): integer;
function TGLUTBitmapFont.TextWidth(Text: string): integer;
begin
//only one font available or style not found then show default
//Result := FFontList[FActiveFont].Font.TextWidth(Text)
Result := glutBitmapLength(FFontList[FActiveFont].Font, PChar(Text));
end;
procedure TGLUTFreeTypeFont.TextOut(x, y: double; Text: string);
procedure TGLUTBitmapFont.TextOut(x, y: double; Text: string);
begin
//FFontList[FActiveFont].Font.Print(x, y, Text);
glListBase(FFontList[FActiveFont].TextListBase);
glRasterPos2f(x, y);
glCallLists(Length(Text), GL_UNSIGNED_BYTE, @Text[1]);
end;
end.