mirror of
https://github.com/Laex/Delphi-OpenCV.git
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369 lines
16 KiB
ObjectPascal
369 lines
16 KiB
ObjectPascal
unit SDL2_Ttf;
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{*******************************************************************************
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SDL2_Ttf.pas v1.0 29/07/2013 first version for DelphiXE
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v1.1 27/08/2013 add MACOS compability
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v1.2 31/05/2014 delete sdl2.inc
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Simple DirectMedia Layer
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Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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Pascal-Header-Conversion SDL from the JEDI-Team written by Domenique Louis and others.
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convert SDL/SDL2 to SDL2 for DelphiXE by Kotai 2013/2014 www.remakesonline.com
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The initial developer of this Pascal code was :
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Dominqiue Louis <Dominique@SavageSoftware.com.au>
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*******************************************************************************}
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interface
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uses
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{$IFDEF MSWINDOWS}
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Winapi.Windows,
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{$ENDIF}
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SDL2;
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const
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{$IFDEF MSWINDOWS}
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SDL_ttfLibName = 'SDL2_ttf.dll';
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{$ENDIF}
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{$IFDEF ANDROID}
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SDL_ttfLibName = 'libSDL2_ttf.so';
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{$ENDIF}
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{$IFDEF MACOS}
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{$IFDEF IOS}
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SDL_ttfLibName = 'libSDL2_ttf.a';
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{$ELSE}
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SDL_ttfLibName = 'SDL2_ttf';
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// SDL_ttfLibName = '../Frameworks/SDL2_ttf.framework/Versions/A/SDL2_ttf';
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{$ENDIF}
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{$ENDIF}
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{* Set up for C function definitions, even when using C++ *}
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{* Printable format: "%d.%d.%d", MAJOR, MINOR, PATCHLEVEL *}
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const
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SDL_TTF_MAJOR_VERSION = 2;
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SDL_TTF_MINOR_VERSION = 0;
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SDL_TTF_PATCHLEVEL = 12;
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{* Backwards compatibility *}
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const
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TTF_MAJOR_VERSION = SDL_TTF_MAJOR_VERSION;
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TTF_MINOR_VERSION = SDL_TTF_MINOR_VERSION;
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TTF_PATCHLEVEL = SDL_TTF_PATCHLEVEL;
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//TTF_VERSION(X) = SDL_TTF_VERSION(X);
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{* This function gets the version of the dynamically linked SDL_ttf library.
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it should NOT be used to fill a version structure, instead you should
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use the SDL_TTF_VERSION() macro.
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*}
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function TTF_Linked_Version(): TSDL_Version;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_Linked_Version' {$ENDIF} {$ENDIF};
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{* ZERO WIDTH NO-BREAKSPACE (Unicode byte order mark) *}
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const
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UNICODE_BOM_NATIVE = $FEFF;
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UNICODE_BOM_SWAPPED = $FFFE;
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{* This function tells the library whether UNICODE text is generally
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byteswapped. A UNICODE BOM character in a string will override
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this setting for the remainder of that string.
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*}
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procedure TTF_ByteSwappedUNICODE(swapped: Integer);
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_ByteSwappedUNICODE' {$ENDIF} {$ENDIF};
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{* The internal structure containing font information *}
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type
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PTTF_Font = ^TTTF_Font;
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TTTF_Font = record end; //todo?
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{* Initialize the TTF engine - returns 0 if successful, -1 on error *}
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function TTF_Init(): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_Init' {$ENDIF} {$ENDIF};
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{* Open a font file and create a font of the specified point size.
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* Some .fon fonts will have several sizes embedded in the file, so the
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* point size becomes the index of choosing which size. If the value
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* is too high, the last indexed size will be the default. *}
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function TTF_OpenFont(_file: PChar; ptsize: Integer): PTTF_Font;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_OpenFont' {$ENDIF} {$ENDIF};
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function TTF_OpenFontIndex(_file: PChar; ptsize: Integer; index: LongInt): PTTF_Font;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_OpenFontIndex' {$ENDIF} {$ENDIF};
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function TTF_OpenFontRW(src: PSDL_RWops; freesrc: Integer; ptsize: LongInt): PTTF_Font;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_OpenFontRW' {$ENDIF} {$ENDIF};
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function TTF_OpenFontIndexRW(src: PSDL_RWops; freesrc: Integer; ptsize: Integer; index: LongInt): PTTF_Font;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_OpenFontIndexRW' {$ENDIF} {$ENDIF};
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{* Set and retrieve the font style *}
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const
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TTF_STYLE_NORMAL = $00;
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TTF_STYLE_BOLD = $01;
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TTF_STYLE_ITALIC = $02;
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TTF_STYLE_UNDERLINE = $04;
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TTF_STYLE_STRIKETHROUGH = $08;
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function TTF_GetFontStyle(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_GetFontStyle' {$ENDIF} {$ENDIF};
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procedure TTF_SetFontStyle(font: PTTF_Font; style: Integer);
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_SetFontStyle' {$ENDIF} {$ENDIF};
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function TTF_GetFontOutline(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_GetFontOutline' {$ENDIF} {$ENDIF};
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procedure TTF_SetFontOutline(font: PTTF_Font; outline: Integer);
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_SetFontOutline' {$ENDIF} {$ENDIF};
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{* Set and retrieve FreeType hinter settings *}
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const
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TTF_HINTING_NORMAL = 0;
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TTF_HINTING_LIGHT = 1;
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TTF_HINTING_MONO = 2;
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TTF_HINTING_NONE = 3;
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function TTF_GetFontHinting(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_GetFontHinting' {$ENDIF} {$ENDIF};
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procedure TTF_SetFontHinting(font: PTTF_Font; hinting: Integer);
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_SetFontHinting' {$ENDIF} {$ENDIF};
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{* Get the total height of the font - usually equal to point size *}
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function TTF_FontHeight(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontHeight' {$ENDIF} {$ENDIF};
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{* Get the offset from the baseline to the top of the font
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This is a positive value, relative to the baseline.
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*}
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function TTF_FontAscent(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontAscent' {$ENDIF} {$ENDIF};
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{* Get the offset from the baseline to the bottom of the font
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This is a negative value, relative to the baseline.
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*}
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function TTF_FontDescent(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontDescent' {$ENDIF} {$ENDIF};
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{* Get the recommended spacing between lines of text for this font *}
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function TTF_FontLineSkip(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontLineSkip' {$ENDIF} {$ENDIF};
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{* Get/Set whether or not kerning is allowed for this font *}
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function TTF_GetFontKerning(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_GetFontKerning' {$ENDIF} {$ENDIF};
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procedure TTF_SetFontKerning(font: PTTF_Font; allowed: Integer);
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_SetFontKerning' {$ENDIF} {$ENDIF};
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{* Get the number of faces of the font *}
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function TTF_FontFaces(font: PTTF_Font): LongInt;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontFaces' {$ENDIF} {$ENDIF};
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{* Get the font face attributes, if any *}
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function TTF_FontFaceIsFixedWidth(font: PTTF_Font): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontFaceIsFixedWidth' {$ENDIF} {$ENDIF};
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function TTF_FontFaceFamilyName(font: PTTF_Font): PChar;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontFaceFamilyName' {$ENDIF} {$ENDIF};
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function TTF_FontFaceStyleName(font: PTTF_Font): PChar;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_FontFaceStyleName' {$ENDIF} {$ENDIF};
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{* Check wether a glyph is provided by the font or not *}
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function TTF_GlyphIsProvided(font: PTTF_Font; ch: UInt16): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_GlyphIsProvided' {$ENDIF} {$ENDIF};
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{* Get the metrics (dimensions) of a glyph
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To understand what these metrics mean, here is a useful link:
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http://freetype.sourceforge.net/freetype2/docs/tutorial/step2.html
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*}
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function TTF_GlyphMetrics(font: PTTF_Font; ch: UInt16; minx, maxx: PInt; miny, maxy: PInt; advance: PInt): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_GlyphMetrics' {$ENDIF} {$ENDIF};
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{* Get the dimensions of a rendered string of text *}
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function TTF_SizeText(font: PTTF_Font; text: PChar; w, h: PInt): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_SizeText' {$ENDIF} {$ENDIF};
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function TTF_SizeUTF8(font: PTTF_Font; text: PChar; w, h: PInt): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_SizeUTF8' {$ENDIF} {$ENDIF};
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function TTF_SizeUNICODE(font: PTTF_Font; text: PUInt16; w, h: PInt): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_SizeUNICODE' {$ENDIF} {$ENDIF};
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{* Create an 8-bit palettized surface and render the given text at
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fast quality with the given font and color. The 0 pixel is the
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colorkey, giving a transparent background, and the 1 pixel is set
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to the text color.
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This function returns the new surface, or NULL if there was an error.
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*}
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function TTF_RenderText_Solid(font: PTTF_Font; text: PChar; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderText_Solid' {$ENDIF} {$ENDIF};
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function TTF_RenderUTF8_Solid(font: PTTF_Font; text: PChar; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUTF8_Solid' {$ENDIF} {$ENDIF};
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function TTF_RenderUNICODE_Solid(font: PTTF_Font; text: PUInt16; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUNICODE_Solid' {$ENDIF} {$ENDIF};
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{* Create an 8-bit palettized surface and render the given glyph at
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fast quality with the given font and color. The 0 pixel is the
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colorkey, giving a transparent background, and the 1 pixel is set
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to the text color. The glyph is rendered without any padding or
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centering in the X direction, and aligned normally in the Y direction.
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This function returns the new surface, or NULL if there was an error.
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*}
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function TTF_RenderGlyph_Solid(font: PTTF_Font; ch: UInt16; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderGlyph_Solid' {$ENDIF} {$ENDIF};
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{* Create an 8-bit palettized surface and render the given text at
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high quality with the given font and colors. The 0 pixel is background,
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while other pixels have varying degrees of the foreground color.
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This function returns the new surface, or NULL if there was an error.
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*}
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function TTF_RenderText_Shaded(font: PTTF_Font; text: PChar; fg, bg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderText_Shaded' {$ENDIF} {$ENDIF};
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function TTF_RenderUTF8_Shaded(font: PTTF_Font; text: PChar; fg, bg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUTF8_Shaded' {$ENDIF} {$ENDIF};
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function TTF_RenderUNICODE_Shaded(font: PTTF_Font; text: PUInt16; fg, bg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUNICODE_Shaded' {$ENDIF} {$ENDIF};
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{* Create an 8-bit palettized surface and render the given glyph at
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high quality with the given font and colors. The 0 pixel is background,
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while other pixels have varying degrees of the foreground color.
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The glyph is rendered without any padding or centering in the X
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direction, and aligned normally in the Y direction.
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This function returns the new surface, or NULL if there was an error.
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*}
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function TTF_RenderGlyph_Shaded(font: PTTF_Font; ch: UInt16; fg, bg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderGlyph_Shaded' {$ENDIF} {$ENDIF};
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{* Create a 32-bit ARGB surface and render the given text at high quality,
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using alpha blending to dither the font with the given color.
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This function returns the new surface, or NULL if there was an error.
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*}
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function TTF_RenderText_Blended(font: PTTF_Font; text: PChar; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderText_Blended' {$ENDIF} {$ENDIF};
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function TTF_RenderUTF8_Blended(font: PTTF_Font; text: PChar; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUTF8_Blended' {$ENDIF} {$ENDIF};
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function TTF_RenderUNICODE_Blended(font: PTTF_Font; text: UInt16; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUNICODE_Blended' {$ENDIF} {$ENDIF};
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{* Create a 32-bit ARGB surface and render the given text at high quality,
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using alpha blending to dither the font with the given color.
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Text is wrapped to multiple lines on line endings and on word boundaries
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if it extends beyond wrapLength in pixels.
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This function returns the new surface, or NULL if there was an error.
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*}
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function TTF_RenderText_Blended_Wrapped(font: PTTF_Font; text: PChar; fg: TSDL_Color; wrapLength: UInt32): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderText_Blended_Wrapped' {$ENDIF} {$ENDIF};
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function TTF_RenderUTF8_Blended_Wrapped(font: PTTF_Font; text: PChar; fg: TSDL_Color; wrapLength: UInt32): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUTF8_Blended_Wrapped' {$ENDIF} {$ENDIF};
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function TTF_RenderUNICODE_Blended_Wrapped(font: PTTF_Font; text: PUInt16; fg: TSDL_Color; wrapLength: UInt32): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderUNICODE_Blended_Wrapped' {$ENDIF} {$ENDIF};
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{* Create a 32-bit ARGB surface and render the given glyph at high quality,
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using alpha blending to dither the font with the given color.
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The glyph is rendered without any padding or centering in the X
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direction, and aligned normally in the Y direction.
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This function returns the new surface, or NULL if there was an error.
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*}
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function TTF_RenderGlyph_Blended(font: PTTF_Font; ch: UInt16; fg: TSDL_Color): PSDL_Surface;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_RenderGlyph_Blended' {$ENDIF} {$ENDIF};
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{* For compatibility with previous versions, here are the old functions *}
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function TTF_RenderText(font: PTTF_Font; text: PChar; fg, bg: TSDL_Color): PSDL_Surface;
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function TTF_RenderUTF8(font: PTTF_Font; text: PChar; fg, bg: TSDL_Color): PSDL_Surface;
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function TTF_RenderUNICODE(font: PTTF_Font; text: PUInt16; fg, bg: TSDL_Color): PSDL_Surface;
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{* Close an opened font file *}
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procedure TTF_CloseFont(font: PTTF_Font);
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_CloseFont' {$ENDIF} {$ENDIF};
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{* De-initialize the TTF engine *}
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procedure TTF_Quit();
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_Quit' {$ENDIF} {$ENDIF};
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{* Check if the TTF engine is initialized *}
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function TTF_WasInit(): Boolean;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_WasInit' {$ENDIF} {$ENDIF};
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{* Get the kerning size of two glyphs *}
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function TTF_GetFontKerningSize(font: PTTF_Font; prev_index, index: Integer): Integer;
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cdecl; external SDL_ttfLibName {$IFDEF MACOS} {$IFNDEF IOS} name '_TTF_GetFontKerningSize' {$ENDIF} {$ENDIF};
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{* We'll use SDL for reporting errors *}
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function TTF_SetError(const fmt: PChar): SInt32;
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function TTF_GetError: PChar;
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//******************************************************************************
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//******************************************************************************
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//******************************************************************************
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//******************************************************************************
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//******************************************************************************
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implementation
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//******************************************************************************
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function TTF_SetError(const fmt: PChar): SInt32;
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begin
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Result := SDL_SetError(fmt);
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end;
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//******************************************************************************
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function TTF_GetError: PChar;
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begin
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Result := SDL_GetError;
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end;
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//******************************************************************************
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function TTF_RenderText(font: PTTF_Font; text: PChar; fg, bg: TSDL_Color): PSDL_Surface;
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begin
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Result := TTF_RenderText_Shaded(font, text, fg, bg);
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end;
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//******************************************************************************
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function TTF_RenderUTF8(font: PTTF_Font; text: PChar; fg, bg: TSDL_Color): PSDL_Surface;
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begin
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Result := TTF_RenderUTF8_Shaded(font, text, fg, bg);
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end;
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//******************************************************************************
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function TTF_RenderUNICODE(font: PTTF_Font; text: PUInt16; fg, bg: TSDL_Color): PSDL_Surface;
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begin
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Result := TTF_RenderUNICODE_Shaded(font, text, fg, bg);
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end;
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end.
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