mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/gfx/cairo/07-ft-variations-runtime-ch...

208 строки
6.6 KiB
Diff
Исходник Ответственный История

diff --git a/gfx/cairo/cairo/src/cairo-ft-font.c b/gfx/cairo/cairo/src/cairo-ft-font.c
--- a/gfx/cairo/cairo/src/cairo-ft-font.c
+++ b/gfx/cairo/cairo/src/cairo-ft-font.c
@@ -72,6 +72,7 @@
#else
#define access(p, m) 0
#endif
+#include <dlfcn.h>
/* Fontconfig version older than 2.6 didn't have these options */
#ifndef FC_LCD_FILTER
@@ -120,6 +121,16 @@ extern void mozilla_UnlockFTLibrary(FT_L
: (void)CAIRO_MUTEX_UNLOCK((unscaled)->mutex))
/**
+ * Function types for FreeType symbols we'll look up at runtime, rather than
+ * relying on build-time checks for availability.
+ */
+typedef FT_Error (*GetVarFunc) (FT_Face, FT_MM_Var**);
+typedef FT_Error (*DoneVarFunc) (FT_Library, FT_MM_Var*);
+typedef FT_Error (*GetVarDesignCoordsFunc) (FT_Face, FT_UInt, FT_Fixed*);
+typedef FT_Error (*SetVarDesignCoordsFunc) (FT_Face, FT_UInt, FT_Fixed*);
+typedef FT_Error (*GetVarBlendCoordsFunc) (FT_Face, FT_UInt, FT_Fixed*);
+
+/**
* SECTION:cairo-ft
* @Title: FreeType Fonts
* @Short_Description: Font support for FreeType
@@ -477,22 +488,31 @@ static cairo_status_t
unscaled->have_color = FT_HAS_COLOR (face) != 0;
unscaled->have_color_set = TRUE;
-#ifdef HAVE_FT_GET_VAR_DESIGN_COORDINATES
- {
+ static GetVarFunc getVar;
+ static DoneVarFunc doneVar;
+ static GetVarDesignCoordsFunc getVarDesignCoords;
+
+ static int firstTime = 1;
+ if (firstTime) {
+ getVar = (GetVarFunc) dlsym (RTLD_DEFAULT, "FT_Get_MM_Var");
+ doneVar = (DoneVarFunc) dlsym (RTLD_DEFAULT, "FT_Done_MM_Var");
+ getVarDesignCoords = (GetVarDesignCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Get_Var_Design_Coordinates");
+ firstTime = 0;
+ }
+
+ if (getVar && getVarDesignCoords) {
FT_MM_Var *ft_mm_var;
- if (0 == FT_Get_MM_Var (face, &ft_mm_var))
+ if (0 == (*getVar) (face, &ft_mm_var))
{
unscaled->variations = calloc (ft_mm_var->num_axis, sizeof (FT_Fixed));
if (unscaled->variations)
- FT_Get_Var_Design_Coordinates (face, ft_mm_var->num_axis, unscaled->variations);
-#if HAVE_FT_DONE_MM_VAR
- FT_Done_MM_Var (face->glyph->library, ft_mm_var);
-#else
- free (ft_mm_var);
-#endif
+ (*getVarDesignCoords) (face, ft_mm_var->num_axis, unscaled->variations);
+ if (doneVar)
+ (*doneVar) (face->glyph->library, ft_mm_var);
+ else
+ free (ft_mm_var);
}
}
-#endif
} else {
char *filename_copy;
@@ -2366,7 +2386,24 @@ cairo_ft_apply_variations (FT_Face
FT_Error ret;
unsigned int instance_id = scaled_font->unscaled->id >> 16;
- ret = FT_Get_MM_Var (face, &ft_mm_var);
+ static GetVarFunc getVar;
+ static DoneVarFunc doneVar;
+ static GetVarDesignCoordsFunc getVarDesignCoords;
+ static SetVarDesignCoordsFunc setVarDesignCoords;
+
+ static int firstTime = 1;
+ if (firstTime) {
+ getVar = (GetVarFunc) dlsym (RTLD_DEFAULT, "FT_Get_MM_Var");
+ doneVar = (DoneVarFunc) dlsym (RTLD_DEFAULT, "FT_Done_MM_Var");
+ getVarDesignCoords = (GetVarDesignCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Get_Var_Design_Coordinates");
+ setVarDesignCoords = (SetVarDesignCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Set_Var_Design_Coordinates");
+ firstTime = 0;
+ }
+
+ if (!getVar || !setVarDesignCoords)
+ return;
+
+ ret = (*getVar) (face, &ft_mm_var);
if (ret == 0) {
FT_Fixed *current_coords;
FT_Fixed *coords;
@@ -2431,27 +2468,28 @@ skip:
}
current_coords = malloc (sizeof (FT_Fixed) * ft_mm_var->num_axis);
-#ifdef HAVE_FT_GET_VAR_DESIGN_COORDINATES
- ret = FT_Get_Var_Design_Coordinates (face, ft_mm_var->num_axis, current_coords);
- if (ret == 0) {
- for (i = 0; i < ft_mm_var->num_axis; i++) {
- if (coords[i] != current_coords[i])
- break;
+
+ if (getVarDesignCoords) {
+ ret = (*getVarDesignCoords) (face, ft_mm_var->num_axis, current_coords);
+ if (ret == 0) {
+ for (i = 0; i < ft_mm_var->num_axis; i++) {
+ if (coords[i] != current_coords[i])
+ break;
+ }
+ if (i == ft_mm_var->num_axis)
+ goto done;
}
- if (i == ft_mm_var->num_axis)
- goto done;
}
-#endif
-
- FT_Set_Var_Design_Coordinates (face, ft_mm_var->num_axis, coords);
+
+ (*setVarDesignCoords) (face, ft_mm_var->num_axis, coords);
done:
free (coords);
free (current_coords);
-#if HAVE_FT_DONE_MM_VAR
- FT_Done_MM_Var (face->glyph->library, ft_mm_var);
-#else
- free (ft_mm_var);
-#endif
+
+ if (doneVar)
+ (*doneVar) (face->glyph->library, ft_mm_var);
+ else
+ free (ft_mm_var);
}
}
@@ -2877,6 +2915,18 @@ static cairo_int_status_t
FT_Face face;
FT_Error error;
+ static GetVarFunc getVar;
+ static DoneVarFunc doneVar;
+ static GetVarBlendCoordsFunc getVarBlendCoords;
+
+ static int firstTime = 1;
+ if (firstTime) {
+ getVar = (GetVarFunc) dlsym (RTLD_DEFAULT, "FT_Get_MM_Var");
+ doneVar = (DoneVarFunc) dlsym (RTLD_DEFAULT, "FT_Done_MM_Var");
+ getVarBlendCoords = (GetVarBlendCoordsFunc) dlsym (RTLD_DEFAULT, "FT_Get_Var_Blend_Coordinates");
+ firstTime = 0;
+ }
+
if (scaled_font->ft_options.synth_flags != 0) {
*is_synthetic = TRUE;
return status;
@@ -2896,7 +2946,7 @@ static cairo_int_status_t
* are the same as the font tables */
*is_synthetic = TRUE;
- error = FT_Get_MM_Var (face, &mm_var);
+ error = getVar ? (*getVar) (face, &mm_var) : -1;
if (error) {
status = _cairo_error (_ft_to_cairo_error (error));
goto cleanup;
@@ -2909,15 +2959,14 @@ static cairo_int_status_t
goto cleanup;
}
-#if FREETYPE_MAJOR > 2 || ( FREETYPE_MAJOR == 2 && FREETYPE_MINOR >= 8)
/* If FT_Get_Var_Blend_Coordinates() is available, we can check if the
* current design coordinates are the default coordinates. In this case
* the current outlines match the font tables.
*/
- {
+ if (getVarBlendCoords) {
int i;
- FT_Get_Var_Blend_Coordinates (face, num_axis, coords);
+ (*getVarBlendCoords) (face, num_axis, coords);
*is_synthetic = FALSE;
for (i = 0; i < num_axis; i++) {
if (coords[i]) {
@@ -2926,15 +2975,13 @@ static cairo_int_status_t
}
}
}
-#endif
cleanup:
free (coords);
-#if HAVE_FT_DONE_MM_VAR
- FT_Done_MM_Var (face->glyph->library, mm_var);
-#else
- free (mm_var);
-#endif
+ if (doneVar)
+ (*doneVar) (face->glyph->library, mm_var);
+ else
+ free (mm_var);
}
_cairo_ft_unscaled_font_unlock_face (unscaled);
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку