diff options
Diffstat (limited to 'pango/pangoft2-fontmap.c')
| -rw-r--r-- | pango/pangoft2-fontmap.c | 240 |
1 files changed, 208 insertions, 32 deletions
diff --git a/pango/pangoft2-fontmap.c b/pango/pangoft2-fontmap.c index 3d172b39..0e29b31d 100644 --- a/pango/pangoft2-fontmap.c +++ b/pango/pangoft2-fontmap.c @@ -31,22 +31,18 @@ #include <dirent.h> #endif +#include <fontconfig/fontconfig.h> + #include "pango-fontmap.h" #include "pango-utils.h" #include "pangoft2-private.h" - -#include <fontconfig/fontconfig.h> +#include "modules.h" #ifdef G_OS_WIN32 #define STRICT #include <windows.h> #endif -#define PANGO_TYPE_FT2_FONT_MAP (pango_ft2_font_map_get_type ()) -#define PANGO_FT2_FONT_MAP(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_FT2_FONT_MAP, PangoFT2FontMap)) -#define PANGO_FT2_IS_FONT_MAP(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_FT2_FONT_MAP)) - -typedef struct _PangoFT2FontMap PangoFT2FontMap; typedef struct _PangoFT2SizeInfo PangoFT2SizeInfo; typedef struct _PangoFT2PatternSet PangoFT2PatternSet; @@ -80,6 +76,16 @@ struct _PangoFT2FontMap /* List of all families availible */ PangoFT2Family **families; int n_families; /* -1 == uninitialized */ + + double dpi_x; + double dpi_y; + + /* Function to call on prepared patterns to do final + * config tweaking. + */ + PangoFT2SubstituteFunc substitute_func; + gpointer substitute_data; + GDestroyNotify substitute_destroy; }; struct _PangoFT2PatternSet @@ -96,7 +102,6 @@ struct _PangoFT2PatternSet #define PANGO_FT2_FACE(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_FT2_TYPE_FACE, PangoFT2Face)) #define PANGO_FT2_IS_FACE(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_FT2_TYPE_FACE)) -static GType pango_ft2_font_map_get_type (void); GType pango_ft2_family_get_type (void); GType pango_ft2_face_get_type (void); @@ -124,7 +129,7 @@ static PangoFontClass *parent_class; /* Parent class structure for PangoFT2Font static PangoFT2FontMap *pango_ft2_global_fontmap = NULL; -static GType +GType pango_ft2_font_map_get_type (void) { static GType object_type = 0; @@ -190,6 +195,18 @@ pango_ft2_pattern_equal (FcPattern *pattern1, return FcPatternEqual (pattern1, pattern2); } +static void +pango_ft2_init_fontset_hash (PangoFT2FontMap *ft2fontmap) +{ + if (ft2fontmap->fontset_hash) + g_hash_table_destroy (ft2fontmap->fontset_hash); + + ft2fontmap->fontset_hash = + g_hash_table_new_full ((GHashFunc)pango_font_description_hash, + (GEqualFunc)pango_font_description_equal, + (GDestroyNotify)pango_font_description_free, + (GDestroyNotify)pango_ft2_font_set_free); +} static void pango_ft2_font_map_init (PangoFT2FontMap *ft2fontmap) @@ -199,12 +216,9 @@ pango_ft2_font_map_init (PangoFT2FontMap *ft2fontmap) ft2fontmap->fonts = g_hash_table_new ((GHashFunc)pango_ft2_pattern_hash, (GEqualFunc)pango_ft2_pattern_equal); - ft2fontmap->fontset_hash = - g_hash_table_new_full ((GHashFunc)pango_font_description_hash, - (GEqualFunc)pango_font_description_equal, - (GDestroyNotify)pango_font_description_free, - (GDestroyNotify)pango_ft2_font_set_free); - + + pango_ft2_init_fontset_hash (ft2fontmap); + ft2fontmap->coverage_hash = g_hash_table_new_full (g_str_hash, g_str_equal, (GDestroyNotify)g_free, @@ -226,28 +240,40 @@ pango_ft2_font_map_class_init (PangoFontMapClass *class) } /** - * pango_ft2_font_map_for_display: - * - * Returns a #PangoFT2FontMap. Font maps are cached and should - * not be freed. If the font map is no longer needed, it can - * be released with pango_ft2_shutdown_display(). - * - * Returns: a #PangoFT2FontMap. + * pango_ft2_font_map_new: + * + * Create a new #PangoFT2FontMap object; a fontmap is used + * to cache information about available fonts, and holds + * certain global parameters such as the resolution and + * the default substitute function (see + * pango_font_map_set_default_substitute ()). + * + * Return value: the newly created fontmap object. Unref + * with g_object_unref when you are finished with it. **/ PangoFontMap * -pango_ft2_font_map_for_display (void) +pango_ft2_font_map_new (void) { + static gboolean registered_modules = FALSE; + PangoFT2FontMap *ft2fontmap; FT_Error error; - - /* Make sure that the type system is initialized */ - g_type_init (); - if (pango_ft2_global_fontmap != NULL) - return PANGO_FONT_MAP (pango_ft2_global_fontmap); + if (!registered_modules) + { + int i; + + registered_modules = TRUE; + + /* Make sure that the type system is initialized */ + g_type_init (); + + for (i = 0; _pango_included_ft2_modules[i].list; i++) + pango_module_register (&_pango_included_ft2_modules[i]); + } - pango_ft2_global_fontmap = (PangoFT2FontMap *)g_object_new (PANGO_TYPE_FT2_FONT_MAP, NULL); + ft2fontmap = g_object_new (PANGO_TYPE_FT2_FONT_MAP, NULL); - error = FT_Init_FreeType (&pango_ft2_global_fontmap->library); + error = FT_Init_FreeType (&ft2fontmap->library); if (error != FT_Err_Ok) { g_warning ("Error from FT_Init_FreeType: %s", @@ -255,13 +281,147 @@ pango_ft2_font_map_for_display (void) return NULL; } + return (PangoFontMap *)ft2fontmap; +} + +/** + * pango_ft2_font_map_set_resolution: + * @fontmap: a #PangoFT2Fontmap + * @dpi_x: dots per inch in the X direction + * @dpi_y: dots per inch in the Y direction + * + * Sets the horizontal and vertical resolutions for the fontmap. + **/ +void +pango_ft2_font_map_set_resolution (PangoFT2FontMap *fontmap, + double dpi_x, + double dpi_y) +{ + g_return_if_fail (PANGO_FT2_IS_FONT_MAP (fontmap)); + + fontmap->dpi_x = dpi_x; + fontmap->dpi_y = dpi_y; + + pango_ft2_font_map_substitute_changed (fontmap); +} + +/** + * pango_ft2_font_map_set_default_substitute: + * @fontmap: a #PangoFT2Fontmap + * @func: function to call to to do final config tweaking + * on #FcPattern objects. + * @data: data to pass to @func + * @notify: function to call when @data is no longer used. + * + * Sets a function that will be called to do final configuration + * substitution on a #FcPattern before it is used to load + * the font. This function can be used to do things like set + * hinting and antiasing options. + **/ +void +pango_ft2_font_map_set_default_substitute (PangoFT2FontMap *fontmap, + PangoFT2SubstituteFunc func, + gpointer data, + GDestroyNotify notify) +{ + g_return_if_fail (PANGO_FT2_IS_FONT_MAP (fontmap)); + + if (fontmap->substitute_destroy) + fontmap->substitute_destroy (fontmap->substitute_data); + + fontmap->substitute_func = func; + fontmap->substitute_data = data; + fontmap->substitute_destroy = notify; + + pango_ft2_font_map_substitute_changed (fontmap); +} + +/** + * pango_ft2_font_map_substitute_changed: + * @fontmap: a #PangoFT2Fontmap + * + * Call this function any time the results of the + * default substitution function set with + * pango_ft2_font_map_set_default_substitute() change. + * That is, if your subsitution function will return different + * results for the same input pattern, you must call this function. + **/ +void +pango_ft2_font_map_substitute_changed (PangoFT2FontMap *fontmap) +{ + pango_ft2_init_fontset_hash (fontmap); +} + +/** + * pango_ft2_font_map_create_context: + * @fontmap: a #PangoFT2Fontmap + * + * Create a #PangoContext for the given fontmap. + * + * Return value: the newly created context; free with g_object_unref(). + **/ +PangoContext * +pango_ft2_font_map_create_context (PangoFT2FontMap *fontmap) +{ + PangoContext *context; + + g_return_val_if_fail (PANGO_FT2_IS_FONT_MAP (fontmap), NULL); + + context = pango_context_new (); + pango_context_set_font_map (context, PANGO_FONT_MAP (fontmap)); + + return context; +} + +/** + * pango_ft2_font_map_for_display: + * + * Returns a #PangoFT2FontMap. This font map is cached and should + * not be freed. If the font map is no longer needed, it can + * be released with pango_ft2_shutdown_display(). + * + * Returns: a #PangoFT2FontMap. + **/ +PangoFontMap * +pango_ft2_font_map_for_display (void) +{ + if (pango_ft2_global_fontmap != NULL) + return PANGO_FONT_MAP (pango_ft2_global_fontmap); + + pango_ft2_global_fontmap = (PangoFT2FontMap *)pango_ft2_font_map_new (); + return PANGO_FONT_MAP (pango_ft2_global_fontmap); } /** + * pango_ft2_get_context: + * @dpi_x: the horizontal dpi of the target device + * @dpi_y: the vertical dpi of the target device + * + * Retrieves a #PangoContext for the default PangoFT2 fontmap + * (see pango_ft2_fontmap_get_for_display()) and sets the resolution + * for the default fontmap to @dpi_x by @dpi_y. + * + * Use of this function is discouraged, see pango_ft2_fontmap_create_context() + * instead. + * + * Return value: the new #PangoContext + **/ +PangoContext * +pango_ft2_get_context (double dpi_x, double dpi_y) +{ + PangoFontMap *fontmap; + + fontmap = pango_ft2_font_map_for_display (); + pango_ft2_font_map_set_resolution (PANGO_FT2_FONT_MAP (fontmap), dpi_x, dpi_y); + + return pango_ft2_font_map_create_context (PANGO_FT2_FONT_MAP (fontmap)); +} + +/** * pango_ft2_shutdown_display: * - * Free cached resources. + * Free the global fontmap. (See pango_ft2_font_map_for_display()) **/ void pango_ft2_shutdown_display (void) @@ -283,6 +443,9 @@ pango_ft2_font_map_finalize (GObject *object) g_hash_table_destroy (ft2fontmap->fontset_hash); g_hash_table_destroy (ft2fontmap->coverage_hash); + if (ft2fontmap->substitute_destroy) + ft2fontmap->substitute_destroy (ft2fontmap->substitute_data); + FT_Done_FreeType (ft2fontmap->library); G_OBJECT_CLASS (parent_class)->finalize (object); @@ -510,6 +673,19 @@ pango_ft2_font_map_load_font (PangoFontMap *fontmap, return font; } +static void +pango_ft2_default_substitute (PangoFT2FontMap *fontmap, + FcPattern *pattern) +{ + FcValue v; + + if (fontmap->substitute_func) + fontmap->substitute_func (pattern, fontmap->substitute_data); + + if (FcPatternGet (pattern, FC_DPI, 0, &v) == FcResultNoMatch) + FcPatternAddDouble (pattern, FC_DPI, fontmap->dpi_y); +} + static PangoFontset * pango_ft2_font_map_load_fontset (PangoFontMap *fontmap, PangoContext *context, @@ -540,7 +716,7 @@ pango_ft2_font_map_load_fontset (PangoFontMap *fontmap, } FcConfigSubstitute (0, pattern, FcMatchPattern); FcDefaultSubstitute (pattern); - pango_ft2_default_substitute (pattern); + pango_ft2_default_substitute (ft2fontmap, pattern); pattern_copy = FcPatternDuplicate (pattern); |