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[cgfont] Add CGFont backend to replace deprecated ATSUI backend
Create a new font backend that uses the CGFont API on MacOS X 10.4 and beyond.
This commit is contained in:
Vladimir Vukicevic
Vladimir Vukicevic
parent
30f7fae647
commit
2be3e67db2
1 changed files with 107 additions and 17 deletions
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@ -41,12 +41,59 @@
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#include "cairo-quartz.h"
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#include "cairo-quartz-private.h"
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/* CreateWithFontName exists in 10.5, but not in 10.4; CreateWithName isn't public in 10.4 */
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static CGFontRef (*CGFontCreateWithFontNamePtr) (CFStringRef) = NULL;
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static CGFontRef (*CGFontCreateWithNamePtr) (const char *) = NULL;
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/* These aren't public before 10.5, and some have different names in 10.4 */
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static int (*CGFontGetUnitsPerEmPtr) (CGFontRef) = NULL;
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static bool (*CGFontGetGlyphAdvancesPtr) (CGFontRef, const CGGlyph[], size_t, int[]) = NULL;
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static bool (*CGFontGetGlyphBBoxesPtr) (CGFontRef, const CGGlyph[], size_t, CGRect[]) = NULL;
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/* Not public, but present */
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extern void CGFontGetGlyphsForUnichars (CGFontRef, const UniChar[], const CGGlyph[], size_t);
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static void (*CGFontGetGlyphsForUnicharsPtr) (CGFontRef, const UniChar[], const CGGlyph[], size_t) = NULL;
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/* Not public in the least bit */
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static CGPathRef (*CGFontGetGlyphPathPtr) (CGFontRef fontRef, CGAffineTransform *textTransform, int unknown, CGGlyph glyph) = NULL;
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static cairo_bool_t _cairo_quartz_font_symbol_lookup_done = FALSE;
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static cairo_bool_t _cairo_quartz_font_symbols_present = FALSE;
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static void
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quartz_font_ensure_symbols(void)
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{
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if (_cairo_quartz_font_symbol_lookup_done)
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return;
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/* Look for the 10.5 versions first */
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CGFontGetGlyphBBoxesPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphBBoxes");
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if (!CGFontGetGlyphBBoxesPtr)
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CGFontGetGlyphBBoxesPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphBoundingBoxes");
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CGFontGetGlyphsForUnicharsPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnichars");
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if (!CGFontGetGlyphsForUnicharsPtr)
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CGFontGetGlyphsForUnicharsPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnicodes");
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/* We just need one of these two */
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CGFontCreateWithFontNamePtr = dlsym(RTLD_DEFAULT, "CGFontCreateWithFontName");
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CGFontCreateWithNamePtr = dlsym(RTLD_DEFAULT, "CGFontCreateWithName");
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/* These have the same name in 10.4 and 10.5 */
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CGFontGetUnitsPerEmPtr = dlsym(RTLD_DEFAULT, "CGFontGetUnitsPerEm");
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CGFontGetGlyphAdvancesPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphAdvances");
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CGFontGetGlyphPathPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphPath");
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if ((CGFontCreateWithFontNamePtr || CGFontCreateWithNamePtr) &&
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CGFontGetGlyphBBoxesPtr &&
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CGFontGetGlyphsForUnicharsPtr &&
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CGFontGetUnitsPerEmPtr &&
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CGFontGetGlyphAdvancesPtr &&
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CGFontGetGlyphPathPtr)
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_cairo_quartz_font_symbols_present = TRUE;
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_cairo_quartz_font_symbol_lookup_done = TRUE;
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}
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typedef struct _cairo_quartz_font_face cairo_quartz_font_face_t;
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typedef struct _cairo_quartz_scaled_font cairo_quartz_scaled_font_t;
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@ -83,6 +130,10 @@ _cairo_quartz_font_face_scaled_font_create (void *abstract_face,
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cairo_quartz_scaled_font_t *font;
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cairo_status_t status;
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quartz_font_ensure_symbols();
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if (!_cairo_quartz_font_symbols_present)
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return _cairo_error (CAIRO_STATUS_NO_MEMORY);
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font = malloc(sizeof(cairo_quartz_scaled_font_t));
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if (font == NULL)
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return _cairo_error (CAIRO_STATUS_NO_MEMORY);
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@ -112,6 +163,8 @@ cairo_quartz_font_face_create_for_cgfont (CGFontRef font)
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{
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cairo_quartz_font_face_t *font_face;
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quartz_font_ensure_symbols();
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font_face = malloc (sizeof (cairo_quartz_font_face_t));
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if (!font_face) {
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_cairo_error (CAIRO_STATUS_NO_MEMORY);
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@ -157,6 +210,10 @@ _cairo_quartz_font_create_toy(cairo_toy_font_face_t *toy_face,
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cairo_font_face_t *face;
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cairo_scaled_font_t *scaled_font;
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quartz_font_ensure_symbols();
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if (!_cairo_quartz_font_symbols_present)
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return _cairo_error (CAIRO_STATUS_NO_MEMORY);
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/* handle CSS-ish faces */
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if (!strcmp(family, "serif") || !strcmp(family, "Times Roman"))
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family = "Times";
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@ -191,9 +248,13 @@ _cairo_quartz_font_create_toy(cairo_toy_font_face_t *toy_face,
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strcat (full_name, " Oblique");
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}
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cgFontName = CFStringCreateWithCString (NULL, full_name, kCFStringEncodingASCII);
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cgFont = CGFontCreateWithFontName (cgFontName);
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CFRelease (cgFontName);
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if (CGFontCreateWithFontNamePtr) {
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cgFontName = CFStringCreateWithCString (NULL, full_name, kCFStringEncodingASCII);
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cgFont = CGFontCreateWithFontNamePtr (cgFontName);
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CFRelease (cgFontName);
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} else {
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cgFont = CGFontCreateWithNamePtr (full_name);
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}
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if (cgFont)
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break;
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@ -277,16 +338,16 @@ _cairo_quartz_init_glyph_metrics (cairo_quartz_scaled_font_t *font,
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CGGlyph glyph = _cairo_quartz_scaled_glyph_index (scaled_glyph);
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int advance;
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CGRect bbox;
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double emscale = CGFontGetUnitsPerEm (font_face->cgFont);
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double emscale = CGFontGetUnitsPerEmPtr (font_face->cgFont);
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double xmin, ymin, xmax, ymax;
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if (glyph == INVALID_GLYPH)
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goto FAIL;
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if (!CGFontGetGlyphAdvances (font_face->cgFont, &glyph, 1, &advance))
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if (!CGFontGetGlyphAdvancesPtr (font_face->cgFont, &glyph, 1, &advance))
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goto FAIL;
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if (!CGFontGetGlyphBBoxes (font_face->cgFont, &glyph, 1, &bbox))
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if (!CGFontGetGlyphBBoxesPtr (font_face->cgFont, &glyph, 1, &bbox))
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goto FAIL;
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#if 0
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@ -379,12 +440,6 @@ _cairo_quartz_init_glyph_path (cairo_quartz_scaled_font_t *font,
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CGPathRef glyphPath;
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cairo_path_fixed_t *path;
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if (CGFontGetGlyphPathPtr == NULL)
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CGFontGetGlyphPathPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphPath");
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if (!CGFontGetGlyphPathPtr)
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return CAIRO_INT_STATUS_UNSUPPORTED;
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if (glyph == INVALID_GLYPH) {
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_cairo_scaled_glyph_set_path (scaled_glyph, &font->base, _cairo_path_fixed_create());
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return CAIRO_STATUS_SUCCESS;
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@ -434,7 +489,7 @@ _cairo_quartz_init_glyph_surface (cairo_quartz_scaled_font_t *font,
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CGRect bbox;
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double width, height;
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double xscale, yscale;
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double emscale = CGFontGetUnitsPerEm (font_face->cgFont);
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double emscale = CGFontGetUnitsPerEmPtr (font_face->cgFont);
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CGColorSpaceRef gray;
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CGContextRef cgContext = NULL;
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@ -460,8 +515,8 @@ _cairo_quartz_init_glyph_surface (cairo_quartz_scaled_font_t *font,
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return CAIRO_STATUS_SUCCESS;
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}
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if (!CGFontGetGlyphAdvances (font_face->cgFont, &glyph, 1, &advance) ||
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!CGFontGetGlyphBBoxes (font_face->cgFont, &glyph, 1, &bbox))
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if (!CGFontGetGlyphAdvancesPtr (font_face->cgFont, &glyph, 1, &advance) ||
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!CGFontGetGlyphBBoxesPtr (font_face->cgFont, &glyph, 1, &bbox))
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{
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return CAIRO_INT_STATUS_UNSUPPORTED;
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}
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@ -560,7 +615,7 @@ _cairo_quartz_ucs4_to_index (void *abstract_font,
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UniChar u = (UniChar) ucs4;
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CGGlyph glyph;
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CGFontGetGlyphsForUnichars (ffont->cgFont, &u, &glyph, 1);
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CGFontGetGlyphsForUnicharsPtr (ffont->cgFont, &u, &glyph, 1);
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return glyph;
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}
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@ -588,3 +643,38 @@ _cairo_quartz_scaled_font_get_cg_font_ref (cairo_scaled_font_t *abstract_font)
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return ffont->cgFont;
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}
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/*
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* compat with old ATSUI backend
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*/
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/**
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* cairo_atsui_font_face_create_for_atsu_font_id
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* @font_id: an ATSUFontID for the font.
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*
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* Creates a new font for the Quartz font backend based on an
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* #ATSUFontID. This font can then be used with
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* cairo_set_font_face() or cairo_scaled_font_create().
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*
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* Return value: a newly created #cairo_font_face_t. Free with
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* cairo_font_face_destroy() when you are done using it.
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*
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* Since: 1.6
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**/
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cairo_font_face_t *
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cairo_quartz_font_face_create_for_atsu_font_id (ATSUFontID font_id)
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{
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ATSFontRef atsFont = FMGetATSFontRefFromFont (font_id);
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CGFontRef cgFont = CGFontCreateWithPlatformFont (&atsFont);
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return cairo_quartz_font_face_create_for_cgfont (cgFont);
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}
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/* This is the old name for the above function, exported for compat purposes */
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cairo_font_face_t *cairo_atsui_font_face_create_for_atsu_font_id (ATSUFontID font_id);
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cairo_font_face_t *
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cairo_atsui_font_face_create_for_atsu_font_id (ATSUFontID font_id)
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{
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return cairo_quartz_font_face_create_for_atsu_font_id (font_id);
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}
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