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-rw-r--r--src/classes0/TextGL.pas462
1 files changed, 462 insertions, 0 deletions
diff --git a/src/classes0/TextGL.pas b/src/classes0/TextGL.pas
new file mode 100644
index 00000000..f7b3ac95
--- /dev/null
+++ b/src/classes0/TextGL.pas
@@ -0,0 +1,462 @@
+unit TextGL;
+
+interface
+
+{$IFDEF FPC}
+ {$MODE Delphi}
+{$ENDIF}
+
+{$I switches.inc}
+
+uses
+ gl,
+ SDL,
+ UTexture,
+ Classes,
+// SDL_ttf,
+ ULog;
+
+procedure BuildFont; // build our bitmap font
+procedure KillFont; // delete the font
+function glTextWidth(text: PChar): real; // returns text width
+procedure glPrintLetter(letter: char);
+procedure glPrint(text: pchar); // custom GL "Print" routine
+procedure SetFontPos(X, Y: real); // sets X and Y
+procedure SetFontZ(Z: real); // sets Z
+procedure SetFontSize(Size: real);
+procedure SetFontStyle(Style: integer); // sets active font style (normal, bold, etc)
+procedure SetFontItalic(Enable: boolean); // sets italic type letter (works for all fonts)
+procedure SetFontAspectW(Aspect: real);
+procedure SetFontReflection(Enable:boolean;Spacing: real); // enables/disables text reflection
+procedure SetFontBlend(Enable: boolean); // enables/disables blending
+
+//function NextPowerOfTwo(Value: integer): integer;
+// Checks if the ttf exists, if yes then a SDL_ttf is returned
+//function LoadFont(FileName: PAnsiChar; PointSize: integer):PTTF_Font;
+// Does the renderstuff, color is in $ffeecc style
+//function RenderText(font: PTTF_Font; Text:PAnsiChar; Color: Cardinal):PSDL_Surface;
+
+type
+ TTextGL = record
+ X: real;
+ Y: real;
+ Z: real;
+ Text: string;
+ Size: real;
+ ColR: real;
+ ColG: real;
+ ColB: real;
+ end;
+
+ PFont = ^TFont;
+ TFont = record
+ Tex: TTexture;
+ Width: array[0..255] of byte;
+ AspectW: real;
+ Centered: boolean;
+ Outline: real;
+ Italic: boolean;
+ Reflection: boolean;
+ ReflectionSpacing: real;
+ Blend: boolean;
+ end;
+
+
+var
+ Fonts: array of TFont;
+ ActFont: integer;
+
+
+implementation
+
+uses
+ UMain,
+ UCommon,
+ SysUtils,
+ UGraphic;
+
+var
+ // Colours for the reflection
+ TempColor: array[0..3] of GLfloat;
+
+procedure LoadBitmapFontInfo(aID : integer; const aType, aResourceName: string);
+var
+ stream: TStream;
+begin
+ stream := GetResourceStream(aResourceName, aType);
+ if (not assigned(stream)) then
+ begin
+ Log.LogError('Unknown font['+ inttostr(aID) +': '+aType+']', 'loadfont');
+ Exit;
+ end;
+ try
+ stream.Read(Fonts[ aID ].Width, 256);
+ except
+ Log.LogError('Error while reading font['+ inttostr(aID) +': '+aType+']', 'loadfont');
+ end;
+ stream.Free;
+end;
+
+// Builds bitmap fonts
+procedure BuildFont;
+var
+ Count: integer;
+begin
+ ActFont := 0;
+
+ SetLength(Fonts, 5);
+ Fonts[0].Tex := Texture.LoadTexture(true, 'Font', TEXTURE_TYPE_TRANSPARENT, 0);
+ Fonts[0].Tex.H := 30;
+ Fonts[0].AspectW := 0.9;
+ Fonts[0].Outline := 0;
+
+ Fonts[1].Tex := Texture.LoadTexture(true, 'FontB', TEXTURE_TYPE_TRANSPARENT, 0);
+ Fonts[1].Tex.H := 30;
+ Fonts[1].AspectW := 1;
+ Fonts[1].Outline := 0;
+
+ Fonts[2].Tex := Texture.LoadTexture(true, 'FontO', TEXTURE_TYPE_TRANSPARENT, 0);
+ Fonts[2].Tex.H := 30;
+ Fonts[2].AspectW := 0.95;
+ Fonts[2].Outline := 5;
+
+ Fonts[3].Tex := Texture.LoadTexture(true, 'FontO2', TEXTURE_TYPE_TRANSPARENT, 0);
+ Fonts[3].Tex.H := 30;
+ Fonts[3].AspectW := 0.95;
+ Fonts[3].Outline := 4;
+
+{ Fonts[4].Tex := Texture.LoadTexture('FontO', TEXTURE_TYPE_TRANSPARENT, 0); // for score screen
+ Fonts[4].Tex.H := 30;
+ Fonts[4].AspectW := 0.95;
+ Fonts[4].Done := -1;
+ Fonts[4].Outline := 5;}
+
+ // load font info
+ LoadBitmapFontInfo( 0, 'FNT', 'Font');
+ LoadBitmapFontInfo( 1, 'FNT', 'FontB');
+ LoadBitmapFontInfo( 2, 'FNT', 'FontO');
+ LoadBitmapFontInfo( 3, 'FNT', 'FontO2');
+
+ for Count := 0 to 255 do
+ Fonts[1].Width[Count] := Fonts[1].Width[Count] div 2;
+
+ for Count := 0 to 255 do
+ Fonts[2].Width[Count] := Fonts[2].Width[Count] div 2 + 2;
+
+ for Count := 0 to 255 do
+ Fonts[3].Width[Count] := Fonts[3].Width[Count] + 1;
+
+{ for Count := 0 to 255 do
+ Fonts[4].Width[Count] := Fonts[4].Width[Count] div 2 + 2;}
+
+ // enable blending by default
+ for Count := 0 to High(Fonts) do
+ Fonts[Count].Blend := true;
+end;
+
+// Deletes the font
+procedure KillFont;
+begin
+ // delete all characters
+ //glDeleteLists(..., 256);
+end;
+
+function glTextWidth(text: pchar): real;
+var
+ Letter: char;
+ i: integer;
+begin
+ Result := 0;
+ for i := 0 to Length(text) -1 do
+ begin
+ Letter := Text[i];
+ Result := Result + Fonts[ActFont].Width[Ord(Letter)] * Fonts[ActFont].Tex.H / 30 * Fonts[ActFont].AspectW;
+ end;
+end;
+
+procedure glPrintLetter(Letter: char);
+var
+ TexX, TexY: real;
+ TexR, TexB: real;
+ TexHeight: real;
+ FWidth: real;
+ PL, PT: real;
+ PR, PB: real;
+ XItal: real; // X shift for italic type letter
+ ReflectionSpacing: real; // Distance of the reflection
+ Font: PFont;
+ Tex: PTexture;
+begin
+ Font := @Fonts[ActFont];
+ Tex := @Font.Tex;
+
+ FWidth := Font.Width[Ord(Letter)];
+
+ Tex.W := FWidth * (Tex.H/30) * Font.AspectW;
+
+ // set texture positions
+ TexX := (ord(Letter) mod 16) * 1/16 + 1/32 - FWidth/1024 - Font.Outline/1024;
+ TexY := (ord(Letter) div 16) * 1/16 + 2/1024;
+ TexR := (ord(Letter) mod 16) * 1/16 + 1/32 + FWidth/1024 + Font.Outline/1024;
+ TexB := (1 + ord(Letter) div 16) * 1/16 - 2/1024;
+
+ TexHeight := TexB - TexY;
+
+ // set vector positions
+ PL := Tex.X - Font.Outline * (Tex.H/30) * Font.AspectW /2;
+ PT := Tex.Y;
+ PR := PL + Tex.W + Font.Outline * (Tex.H/30) * Font.AspectW;
+ PB := PT + Tex.H;
+
+ if (not Font.Italic) then
+ XItal := 0
+ else
+ XItal := 12;
+
+ if (Font.Blend) then
+ begin
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ end;
+
+ glEnable(GL_TEXTURE_2D);
+ glBindTexture(GL_TEXTURE_2D, Tex.TexNum);
+
+ glBegin(GL_QUADS);
+ glTexCoord2f(TexX, TexY); glVertex2f(PL+XItal, PT);
+ glTexCoord2f(TexX, TexB); glVertex2f(PL, PB);
+ glTexCoord2f(TexR, TexB); glVertex2f(PR, PB);
+ glTexCoord2f(TexR, TexY); glVertex2f(PR+XItal, PT);
+ glEnd;
+
+ // <mog> Reflection
+ // Yes it would make sense to put this in an extra procedure,
+ // but this works, doesn't take much lines, and is almost lightweight
+ if Font.Reflection then
+ begin
+ ReflectionSpacing := Font.ReflectionSpacing + Tex.H/2;
+
+ glDepthRange(0, 10);
+ glDepthFunc(GL_LEQUAL);
+ glEnable(GL_DEPTH_TEST);
+
+ glBegin(GL_QUADS);
+ glColor4f(TempColor[0], TempColor[1], TempColor[2], 0);
+ glTexCoord2f(TexX, TexY + TexHeight/2);
+ glVertex3f(PL, PB + ReflectionSpacing - Tex.H/2, Tex.z);
+
+ glColor4f(TempColor[0], TempColor[1], TempColor[2], Tex.Alpha-0.3);
+ glTexCoord2f(TexX, TexB );
+ glVertex3f(PL + XItal, PT + ReflectionSpacing, Tex.z);
+
+ glTexCoord2f(TexR, TexB );
+ glVertex3f(PR + XItal, PT + ReflectionSpacing, Tex.z);
+
+ glColor4f(TempColor[0], TempColor[1], TempColor[2], 0);
+ glTexCoord2f(TexR, TexY + TexHeight/2);
+ glVertex3f(PR, PB + ReflectionSpacing - Tex.H/2, Tex.z);
+ glEnd;
+
+ glDisable(GL_DEPTH_TEST);
+ end; // reflection
+
+ glDisable(GL_TEXTURE_2D);
+ if (Font.Blend) then
+ glDisable(GL_BLEND);
+
+ Tex.X := Tex.X + Tex.W;
+
+ //write the colour back
+ glColor4fv(@TempColor);
+end;
+
+// Custom GL "Print" Routine
+procedure glPrint(Text: PChar);
+var
+ Pos: integer;
+begin
+ // if there is no text do nothing
+ if ((Text = nil) or (Text = '')) then
+ Exit;
+
+ //Save the actual color and alpha (for reflection)
+ glGetFloatv(GL_CURRENT_COLOR, @TempColor);
+
+ for Pos := 0 to Length(Text) - 1 do
+ begin
+ glPrintLetter(Text[Pos]);
+ end;
+end;
+
+procedure SetFontPos(X, Y: real);
+begin
+ Fonts[ActFont].Tex.X := X;
+ Fonts[ActFont].Tex.Y := Y;
+end;
+
+procedure SetFontZ(Z: real);
+begin
+ Fonts[ActFont].Tex.Z := Z;
+end;
+
+procedure SetFontSize(Size: real);
+begin
+ Fonts[ActFont].Tex.H := 30 * (Size/10);
+end;
+
+procedure SetFontStyle(Style: integer);
+begin
+ ActFont := Style;
+end;
+
+procedure SetFontItalic(Enable: boolean);
+begin
+ Fonts[ActFont].Italic := Enable;
+end;
+
+procedure SetFontAspectW(Aspect: real);
+begin
+ Fonts[ActFont].AspectW := Aspect;
+end;
+
+procedure SetFontReflection(Enable: boolean; Spacing: real);
+begin
+ Fonts[ActFont].Reflection := Enable;
+ Fonts[ActFont].ReflectionSpacing := Spacing;
+end;
+
+procedure SetFontBlend(Enable: boolean);
+begin
+ Fonts[ActFont].Blend := Enable;
+end;
+
+
+
+
+(*
+<mog> I uncommented this, because it was some kind of after hour hack together with blindy
+it's actually just a prove of concept, as it's having some flaws
+- instead nice and clean ttf code should be placed here :)
+
+{$IFDEF FPC}
+ {$ASMMODE Intel}
+{$ENDIF}
+
+function NextPowerOfTwo(Value: integer): integer;
+begin
+ Result:= 1;
+{$IF Defined(CPUX86_64)}
+ asm
+ mov rcx, -1
+ bsr rcx, Value
+ inc rcx
+ shl Result, cl
+ end;
+{$ELSEIF Defined(CPU386) or Defined(CPUI386)}
+ asm
+ mov ecx, -1
+ bsr ecx, Value
+ inc ecx
+ shl Result, cl
+ end;
+{$ELSE}
+ while (Result <= Value) do
+ Result := 2 * Result;
+{$IFEND}
+end;
+
+function LoadFont(FileName: PAnsiChar; PointSize: integer):PTTF_Font;
+begin
+ if (FileExists(FileName)) then
+ begin
+ Result := TTF_OpenFont( FileName, PointSize );
+ end
+ else
+ begin
+ Log.LogStatus('ERROR Could not find font in ' + FileName , '');
+ ShowMessage( 'ERROR Could not find font in ' + FileName );
+ Result := nil;
+ end;
+end;
+
+function RenderText(font: PTTF_Font; Text:PAnsiChar; Color: Cardinal): PSDL_Surface;
+var
+ clr : TSDL_color;
+begin
+ clr.r := ((Color and $ff0000) shr 16 ) div 255;
+ clr.g := ((Color and $ff00 ) shr 8 ) div 255;
+ clr.b := ( Color and $ff ) div 255 ;
+
+ result := TTF_RenderText_Blended( font, text, cLr);
+end;
+
+procedure printrandomtext();
+var
+ stext,intermediary : PSDL_surface;
+ clrFg, clrBG : TSDL_color;
+ texture : Gluint;
+ font : PTTF_Font;
+ w,h : integer;
+begin
+
+ font := LoadFont('fonts\comicbd.ttf', 42);
+
+ clrFg.r := 255;
+ clrFg.g := 255;
+ clrFg.b := 255;
+ clrFg.unused := 255;
+
+ clrBg.r := 255;
+ clrbg.g := 0;
+ clrbg.b := 255;
+ clrbg.unused := 0;
+
+ sText := RenderText(font, 'katzeeeeeee', $fe198e);
+ //sText := TTF_RenderText_Blended( font, 'huuuuuuuuuund', clrFG);
+
+ // Convert the rendered text to a known format
+ w := nextpoweroftwo(sText.w);
+ h := nextpoweroftwo(sText.h);
+
+ intermediary := SDL_CreateRGBSurface(0, w, h, 32,
+ $000000ff, $0000ff00, $00ff0000, $ff000000);
+
+ SDL_SetAlpha(intermediary, 0, 255);
+ SDL_SetAlpha(sText, 0, 255);
+ SDL_BlitSurface(sText, nil, intermediary, nil);
+
+ glGenTextures(1, @texture);
+
+ glBindTexture(GL_TEXTURE_2D, texture);
+
+ glTexImage2D(GL_TEXTURE_2D, 0, 4, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, intermediary.pixels);
+
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+ glEnable(GL_TEXTURE_2D);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glEnable(GL_BLEND);
+ glBindTexture(GL_TEXTURE_2D, texture);
+ glColor4f(1, 0, 1, 1);
+
+ glbegin(gl_quads);
+ glTexCoord2f(0, 0); glVertex2f(200 , 300 );
+ glTexCoord2f(0, sText.h/h); glVertex2f(200 , 300 + sText.h);
+ glTexCoord2f(sText.w/w, sText.h/h); glVertex2f(200 + sText.w, 300 + sText.h);
+ glTexCoord2f(sText.w/w, 0); glVertex2f(200 + sText.w, 300 );
+ glEnd;
+ glfinish();
+ glDisable(GL_BLEND);
+ gldisable(gl_texture_2d);
+
+ SDL_FreeSurface(sText);
+ SDL_FreeSurface(intermediary);
+ glDeleteTextures(1, @texture);
+ TTF_CloseFont(font);
+
+end;
+*)
+
+
+end.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 08:13:02 +0000