fontcache.cpp File Reference

Cache for characters from fonts. More...

#include "stdafx.h"
#include "fontcache.h"
#include "blitter/factory.hpp"
#include "core/math_func.hpp"
#include "table/sprites.h"
#include "table/control_codes.h"
#include <ft2build.h>
#include <FT_FREETYPE_H>
#include <FT_GLYPH_H>
#include <fontconfig/fontconfig.h>
#include "table/unicode.h"

Go to the source code of this file.

Data Structures

struct  GlyphEntry

Functions

static FT_Error GetFontByFaceName (const char *font_name, FT_Face *face)
 Get the font loaded into a Freetype face by using a font-name.
bool SetFallbackFont (FreeTypeSettings *settings, const char *language_isocode, int winlangid, SetFallbackFontCallback *callback)
 We would like to have a fallback font as the current one doesn't contain all characters we need.
static void SetFontGeometry (FT_Face face, FontSize size, int pixels)
static void LoadFreeTypeFont (const char *font_name, FT_Face *face, const char *type)
 Loads the freetype font.
void InitFreeType ()
static void ResetGlyphCache ()
 Clear the complete cache.
static void UnloadFace (FT_Face *face)
 Unload a face and set it to NULL.
void UninitFreeType ()
 Free everything allocated w.r.t.
static FT_Face GetFontFace (FontSize size)
static GlyphEntryGetGlyphPtr (FontSize size, WChar key)
static void SetGlyphPtr (FontSize size, WChar key, const GlyphEntry *glyph, bool duplicate=false)
static void * AllocateFont (size_t size)
static bool GetFontAAState (FontSize size)
const SpriteGetGlyph (FontSize size, WChar key)
uint GetGlyphWidth (FontSize size, WChar key)
void ResetFontSizes ()
 Reset the font sizes to the defaults of the sprite based fonts.
static SpriteID GetFontBase (FontSize size)
 Get the SpriteID of the first glyph for the given font size.
SpriteID GetUnicodeGlyph (FontSize size, uint32 key)
 Get the SpriteID mapped to the given font size and key.
void SetUnicodeGlyph (FontSize size, uint32 key, SpriteID sprite)
 Map a SpriteID to the font size and key.
void InitializeUnicodeGlyphMap ()
 Initialize the glyph map.

Variables

static const int ASCII_LETTERSTART = 32
 First printable ASCII letter.
int _font_height [FS_END]
 Semi-constant for the height of the different sizes of fonts.
static FT_Library _library = NULL
static FT_Face _face_small = NULL
static FT_Face _face_medium = NULL
static FT_Face _face_large = NULL
static int _ascender [FS_END]
FreeTypeSettings _freetype
static const byte FACE_COLOUR = 1
static const byte SHADOW_COLOUR = 2
static GlyphEntry ** _glyph_ptr [FS_END]
static SpriteID ** _unicode_glyph_map [FS_END]

Detailed Description

Cache for characters from fonts.

Definition in file fontcache.cpp.


Function Documentation

static FT_Error GetFontByFaceName ( const char *  font_name,
FT_Face *  face 
) [static]

Get the font loaded into a Freetype face by using a font-name.

If no appropiate font is found, the function returns an error

Definition at line 620 of file fontcache.cpp.

References ShowInfoF().

Referenced by LoadFreeTypeFont().

static void LoadFreeTypeFont ( const char *  font_name,
FT_Face *  face,
const char *  type 
) [static]

Loads the freetype font.

First type to load the fontname as if it were a path. If that fails, try to resolve the filename of the font using fontconfig, where the format is 'font family name' or 'font family name, font style'.

Definition at line 769 of file fontcache.cpp.

References DEBUG, error(), GetFontByFaceName(), ShowInfoF(), and StrEmpty().

void ResetFontSizes (  ) 

Reset the font sizes to the defaults of the sprite based fonts.

Definition at line 1098 of file fontcache.cpp.

References _font_height, FS_LARGE, FS_NORMAL, and FS_SMALL.

Referenced by UninitFreeType().

bool SetFallbackFont ( FreeTypeSettings settings,
const char *  language_isocode,
int  winlangid,
SetFallbackFontCallback *  callback 
)

We would like to have a fallback font as the current one doesn't contain all characters we need.

This function must set all fonts of settings.

Parameters:
settings the settings to overwrite the fontname of.
language_isocode the language, e.g. en_GB.
winlangid the language ID windows style.
callback The function to call to check for missing glyphs.
Returns:
true if a font has been set, false otherwise.

Definition at line 686 of file fontcache.cpp.

References DEBUG, lastof, seprintf(), and strecpy().

Referenced by CheckForMissingGlyphsInLoadedLanguagePack().

void UninitFreeType (  ) 

Free everything allocated w.r.t.

fonts.

Definition at line 864 of file fontcache.cpp.

References ResetFontSizes(), ResetGlyphCache(), and UnloadFace().

Referenced by CheckForMissingGlyphsInLoadedLanguagePack(), and FindMissingGlyphs().

static void UnloadFace ( FT_Face *  face  )  [static]

Unload a face and set it to NULL.

Parameters:
face the face to unload

Definition at line 853 of file fontcache.cpp.

Referenced by UninitFreeType().


Variable Documentation

int _font_height[FS_END]

Semi-constant for the height of the different sizes of fonts.

Definition at line 23 of file fontcache.cpp.

Referenced by GetCharacterHeight(), and ResetFontSizes().


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