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Diffstat (limited to 'src/cairo-quartz-font.c')
| -rw-r--r-- | src/cairo-quartz-font.c | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/src/cairo-quartz-font.c b/src/cairo-quartz-font.c new file mode 100644 index 000000000..02f34267b --- /dev/null +++ b/src/cairo-quartz-font.c @@ -0,0 +1,859 @@ +/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */ +/* cairo - a vector graphics library with display and print output + * + * Copyright � 2008 Mozilla Corporation + * + * This library is free software; you can redistribute it and/or + * modify it either under the terms of the GNU Lesser General Public + * License version 2.1 as published by the Free Software Foundation + * (the "LGPL") or, at your option, under the terms of the Mozilla + * Public License Version 1.1 (the "MPL"). If you do not alter this + * notice, a recipient may use your version of this file under either + * the MPL or the LGPL. + * + * You should have received a copy of the LGPL along with this library + * in the file COPYING-LGPL-2.1; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA + * You should have received a copy of the MPL along with this library + * in the file COPYING-MPL-1.1 + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "License"); you may not use this file except in + * compliance with the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY + * OF ANY KIND, either express or implied. See the LGPL or the MPL for + * the specific language governing rights and limitations. + * + * The Original Code is the cairo graphics library. + * + * The Initial Developer of the Original Code is Mozilla Foundation. + * + * Contributor(s): + * Vladimir Vukicevic <vladimir@mozilla.com> + */ + +#include "cairoint.h" + +#include <dlfcn.h> + +#include "cairo-image-surface-private.h" +#include "cairo-quartz.h" +#include "cairo-quartz-private.h" + +#include "cairo-error-private.h" + +/** + * SECTION:cairo-quartz-fonts + * @Title: Quartz (CGFont) Fonts + * @Short_Description: Font support via CGFont on OS X + * @See_Also: #cairo_font_face_t + * + * The Quartz font backend is primarily used to render text on Apple + * MacOS X systems. The CGFont API is used for the internal + * implementation of the font backend methods. + **/ + +/** + * CAIRO_HAS_QUARTZ_FONT: + * + * Defined if the Quartz font backend is available. + * This macro can be used to conditionally compile backend-specific code. + * + * Since: 1.6 + **/ + +static CFDataRef (*CGFontCopyTableForTagPtr) (CGFontRef font, uint32_t tag) = NULL; + +/* CreateWithFontName exists in 10.5, but not in 10.4; CreateWithName isn't public in 10.4 */ +static CGFontRef (*CGFontCreateWithFontNamePtr) (CFStringRef) = NULL; +static CGFontRef (*CGFontCreateWithNamePtr) (const char *) = NULL; + +/* These aren't public before 10.5, and some have different names in 10.4 */ +static int (*CGFontGetUnitsPerEmPtr) (CGFontRef) = NULL; +static bool (*CGFontGetGlyphAdvancesPtr) (CGFontRef, const CGGlyph[], size_t, int[]) = NULL; +static bool (*CGFontGetGlyphBBoxesPtr) (CGFontRef, const CGGlyph[], size_t, CGRect[]) = NULL; +static CGRect (*CGFontGetFontBBoxPtr) (CGFontRef) = NULL; + +/* Not public, but present */ +static void (*CGFontGetGlyphsForUnicharsPtr) (CGFontRef, const UniChar[], const CGGlyph[], size_t) = NULL; +static void (*CGContextSetAllowsFontSmoothingPtr) (CGContextRef, bool) = NULL; +static bool (*CGContextGetAllowsFontSmoothingPtr) (CGContextRef) = NULL; + +/* CGFontGetHMetrics isn't public, but the other functions are public/present in 10.5 */ +typedef struct { + int ascent; + int descent; + int leading; +} quartz_CGFontMetrics; +static quartz_CGFontMetrics* (*CGFontGetHMetricsPtr) (CGFontRef fontRef) = NULL; +static int (*CGFontGetAscentPtr) (CGFontRef fontRef) = NULL; +static int (*CGFontGetDescentPtr) (CGFontRef fontRef) = NULL; +static int (*CGFontGetLeadingPtr) (CGFontRef fontRef) = NULL; + +/* Not public anymore in 64-bits nor in 10.7 */ +static ATSFontRef (*FMGetATSFontRefFromFontPtr) (FMFont iFont) = NULL; + +static cairo_bool_t _cairo_quartz_font_symbol_lookup_done = FALSE; +static cairo_bool_t _cairo_quartz_font_symbols_present = FALSE; + +static void +quartz_font_ensure_symbols(void) +{ + if (_cairo_quartz_font_symbol_lookup_done) + return; + + CGFontCopyTableForTagPtr = dlsym(RTLD_DEFAULT, "CGFontCopyTableForTag"); + + /* Look for the 10.5 versions first */ + CGFontGetGlyphBBoxesPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphBBoxes"); + if (!CGFontGetGlyphBBoxesPtr) + CGFontGetGlyphBBoxesPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphBoundingBoxes"); + + CGFontGetGlyphsForUnicharsPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnichars"); + if (!CGFontGetGlyphsForUnicharsPtr) + CGFontGetGlyphsForUnicharsPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphsForUnicodes"); + + CGFontGetFontBBoxPtr = dlsym(RTLD_DEFAULT, "CGFontGetFontBBox"); + + /* We just need one of these two */ + CGFontCreateWithFontNamePtr = dlsym(RTLD_DEFAULT, "CGFontCreateWithFontName"); + CGFontCreateWithNamePtr = dlsym(RTLD_DEFAULT, "CGFontCreateWithName"); + + /* These have the same name in 10.4 and 10.5 */ + CGFontGetUnitsPerEmPtr = dlsym(RTLD_DEFAULT, "CGFontGetUnitsPerEm"); + CGFontGetGlyphAdvancesPtr = dlsym(RTLD_DEFAULT, "CGFontGetGlyphAdvances"); + + CGFontGetHMetricsPtr = dlsym(RTLD_DEFAULT, "CGFontGetHMetrics"); + CGFontGetAscentPtr = dlsym(RTLD_DEFAULT, "CGFontGetAscent"); + CGFontGetDescentPtr = dlsym(RTLD_DEFAULT, "CGFontGetDescent"); + CGFontGetLeadingPtr = dlsym(RTLD_DEFAULT, "CGFontGetLeading"); + + CGContextGetAllowsFontSmoothingPtr = dlsym(RTLD_DEFAULT, "CGContextGetAllowsFontSmoothing"); + CGContextSetAllowsFontSmoothingPtr = dlsym(RTLD_DEFAULT, "CGContextSetAllowsFontSmoothing"); + + FMGetATSFontRefFromFontPtr = dlsym(RTLD_DEFAULT, "FMGetATSFontRefFromFont"); + + if ((CGFontCreateWithFontNamePtr || CGFontCreateWithNamePtr) && + CGFontGetGlyphBBoxesPtr && + CGFontGetGlyphsForUnicharsPtr && + CGFontGetUnitsPerEmPtr && + CGFontGetGlyphAdvancesPtr && + (CGFontGetHMetricsPtr || (CGFontGetAscentPtr && CGFontGetDescentPtr && CGFontGetLeadingPtr))) + _cairo_quartz_font_symbols_present = TRUE; + + _cairo_quartz_font_symbol_lookup_done = TRUE; +} + +typedef struct _cairo_quartz_font_face cairo_quartz_font_face_t; +typedef struct _cairo_quartz_scaled_font cairo_quartz_scaled_font_t; + +struct _cairo_quartz_scaled_font { + cairo_scaled_font_t base; +}; + +struct _cairo_quartz_font_face { + cairo_font_face_t base; + + CGFontRef cgFont; +}; + +/* + * font face backend + */ + +static cairo_status_t +_cairo_quartz_font_face_create_for_toy (cairo_toy_font_face_t *toy_face, + cairo_font_face_t **font_face) +{ + const char *family; + char *full_name; + CFStringRef cgFontName = NULL; + CGFontRef cgFont = NULL; + int loop; + + quartz_font_ensure_symbols(); + if (! _cairo_quartz_font_symbols_present) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + + family = toy_face->family; + full_name = malloc (strlen (family) + 64); // give us a bit of room to tack on Bold, Oblique, etc. + /* handle CSS-ish faces */ + if (!strcmp(family, "serif") || !strcmp(family, "Times Roman")) + family = "Times"; + else if (!strcmp(family, "sans-serif") || !strcmp(family, "sans")) + family = "Helvetica"; + else if (!strcmp(family, "cursive")) + family = "Apple Chancery"; + else if (!strcmp(family, "fantasy")) + family = "Papyrus"; + else if (!strcmp(family, "monospace") || !strcmp(family, "mono")) + family = "Courier"; + + /* Try to build up the full name, e.g. "Helvetica Bold Oblique" first, + * then drop the bold, then drop the slant, then drop both.. finally + * just use "Helvetica". And if Helvetica doesn't exist, give up. + */ + for (loop = 0; loop < 5; loop++) { + if (loop == 4) + family = "Helvetica"; + + strcpy (full_name, family); + + if (loop < 3 && (loop & 1) == 0) { + if (toy_face->weight == CAIRO_FONT_WEIGHT_BOLD) + strcat (full_name, " Bold"); + } + + if (loop < 3 && (loop & 2) == 0) { + if (toy_face->slant == CAIRO_FONT_SLANT_ITALIC) + strcat (full_name, " Italic"); + else if (toy_face->slant == CAIRO_FONT_SLANT_OBLIQUE) + strcat (full_name, " Oblique"); + } + + if (CGFontCreateWithFontNamePtr) { + cgFontName = CFStringCreateWithCString (NULL, full_name, kCFStringEncodingASCII); + cgFont = CGFontCreateWithFontNamePtr (cgFontName); + CFRelease (cgFontName); + } else { + cgFont = CGFontCreateWithNamePtr (full_name); + } + + if (cgFont) + break; + } + + if (!cgFont) { + /* Give up */ + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + } + + *font_face = cairo_quartz_font_face_create_for_cgfont (cgFont); + CGFontRelease (cgFont); + + return CAIRO_STATUS_SUCCESS; +} + +static cairo_bool_t +_cairo_quartz_font_face_destroy (void *abstract_face) +{ + cairo_quartz_font_face_t *font_face = (cairo_quartz_font_face_t*) abstract_face; + + CGFontRelease (font_face->cgFont); + return TRUE; +} + +static const cairo_scaled_font_backend_t _cairo_quartz_scaled_font_backend; + +static cairo_status_t +_cairo_quartz_font_face_scaled_font_create (void *abstract_face, + const cairo_matrix_t *font_matrix, + const cairo_matrix_t *ctm, + const cairo_font_options_t *options, + cairo_scaled_font_t **font_out) +{ + cairo_quartz_font_face_t *font_face = abstract_face; + cairo_quartz_scaled_font_t *font = NULL; + cairo_status_t status; + cairo_font_extents_t fs_metrics; + double ems; + CGRect bbox; + + quartz_font_ensure_symbols(); + if (!_cairo_quartz_font_symbols_present) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + + font = malloc(sizeof(cairo_quartz_scaled_font_t)); + if (font == NULL) + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + + memset (font, 0, sizeof(cairo_quartz_scaled_font_t)); + + status = _cairo_scaled_font_init (&font->base, + &font_face->base, font_matrix, ctm, options, + &_cairo_quartz_scaled_font_backend); + if (status) + goto FINISH; + + ems = CGFontGetUnitsPerEmPtr (font_face->cgFont); + + /* initialize metrics */ + if (CGFontGetFontBBoxPtr && CGFontGetAscentPtr) { + fs_metrics.ascent = (CGFontGetAscentPtr (font_face->cgFont) / ems); + fs_metrics.descent = - (CGFontGetDescentPtr (font_face->cgFont) / ems); + fs_metrics.height = fs_metrics.ascent + fs_metrics.descent + + (CGFontGetLeadingPtr (font_face->cgFont) / ems); + + bbox = CGFontGetFontBBoxPtr (font_face->cgFont); + fs_metrics.max_x_advance = CGRectGetMaxX(bbox) / ems; + fs_metrics.max_y_advance = 0.0; + } else { + CGGlyph wGlyph; + UniChar u; + + quartz_CGFontMetrics *m; + m = CGFontGetHMetricsPtr (font_face->cgFont); + + /* On OX 10.4, GetHMetricsPtr sometimes returns NULL for unknown reasons */ + if (!m) { + status = _cairo_error(CAIRO_STATUS_NULL_POINTER); + goto FINISH; + } + + fs_metrics.ascent = (m->ascent / ems); + fs_metrics.descent = - (m->descent / ems); + fs_metrics.height = fs_metrics.ascent + fs_metrics.descent + (m->leading / ems); + + /* We kind of have to guess here; W's big, right? */ + u = (UniChar) 'W'; + CGFontGetGlyphsForUnicharsPtr (font_face->cgFont, &u, &wGlyph, 1); + if (wGlyph && CGFontGetGlyphBBoxesPtr (font_face->cgFont, &wGlyph, 1, &bbox)) { + fs_metrics.max_x_advance = CGRectGetMaxX(bbox) / ems; + fs_metrics.max_y_advance = 0.0; + } else { + fs_metrics.max_x_advance = 0.0; + fs_metrics.max_y_advance = 0.0; + } + } + + status = _cairo_scaled_font_set_metrics (&font->base, &fs_metrics); + +FINISH: + if (status != CAIRO_STATUS_SUCCESS) { + free (font); + } else { + *font_out = (cairo_scaled_font_t*) font; + } + + return status; +} + +const cairo_font_face_backend_t _cairo_quartz_font_face_backend = { + CAIRO_FONT_TYPE_QUARTZ, + _cairo_quartz_font_face_create_for_toy, + _cairo_quartz_font_face_destroy, + _cairo_quartz_font_face_scaled_font_create +}; + +/** + * cairo_quartz_font_face_create_for_cgfont: + * @font: a #CGFontRef obtained through a method external to cairo. + * + * Creates a new font for the Quartz font backend based on a + * #CGFontRef. This font can then be used with + * cairo_set_font_face() or cairo_scaled_font_create(). + * + * Return value: a newly created #cairo_font_face_t. Free with + * cairo_font_face_destroy() when you are done using it. + * + * Since: 1.6 + **/ +cairo_font_face_t * +cairo_quartz_font_face_create_for_cgfont (CGFontRef font) +{ + cairo_quartz_font_face_t *font_face; + + quartz_font_ensure_symbols(); + + font_face = malloc (sizeof (cairo_quartz_font_face_t)); + if (!font_face) { + cairo_status_t ignore_status; + ignore_status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + return (cairo_font_face_t *)&_cairo_font_face_nil; + } + + font_face->cgFont = CGFontRetain (font); + + _cairo_font_face_init (&font_face->base, &_cairo_quartz_font_face_backend); + + return &font_face->base; +} + +/* + * scaled font backend + */ + +static cairo_quartz_font_face_t * +_cairo_quartz_scaled_to_face (void *abstract_font) +{ + cairo_quartz_scaled_font_t *sfont = (cairo_quartz_scaled_font_t*) abstract_font; + cairo_font_face_t *font_face = sfont->base.font_face; + assert (font_face->backend->type == CAIRO_FONT_TYPE_QUARTZ); + return (cairo_quartz_font_face_t*) font_face; +} + +static void +_cairo_quartz_scaled_font_fini(void *abstract_font) +{ +} + +#define INVALID_GLYPH 0x00 + +static inline CGGlyph +_cairo_quartz_scaled_glyph_index (cairo_scaled_glyph_t *scaled_glyph) { + unsigned long index = _cairo_scaled_glyph_index (scaled_glyph); + if (index > 0xffff) + return INVALID_GLYPH; + return (CGGlyph) index; +} + +static cairo_int_status_t +_cairo_quartz_init_glyph_metrics (cairo_quartz_scaled_font_t *font, + cairo_scaled_glyph_t *scaled_glyph) +{ + cairo_int_status_t status = CAIRO_STATUS_SUCCESS; + + cairo_quartz_font_face_t *font_face = _cairo_quartz_scaled_to_face(font); + cairo_text_extents_t extents = {0, 0, 0, 0, 0, 0}; + CGGlyph glyph = _cairo_quartz_scaled_glyph_index (scaled_glyph); + int advance; + CGRect bbox; + double emscale = CGFontGetUnitsPerEmPtr (font_face->cgFont); + double xmin, ymin, xmax, ymax; + + if (glyph == INVALID_GLYPH) + goto FAIL; + + if (!CGFontGetGlyphAdvancesPtr (font_face->cgFont, &glyph, 1, &advance) || + !CGFontGetGlyphBBoxesPtr (font_face->cgFont, &glyph, 1, &bbox)) + goto FAIL; + + /* broken fonts like Al Bayan return incorrect bounds for some null characters, + see https://bugzilla.mozilla.org/show_bug.cgi?id=534260 */ + if (unlikely (bbox.origin.x == -32767 && + bbox.origin.y == -32767 && + bbox.size.width == 65534 && + bbox.size.height == 65534)) { + bbox.origin.x = bbox.origin.y = 0; + bbox.size.width = bbox.size.height = 0; + } + + bbox = CGRectMake (bbox.origin.x / emscale, + bbox.origin.y / emscale, + bbox.size.width / emscale, + bbox.size.height / emscale); + + /* Should we want to always integer-align glyph extents, we can do so in this way */ +#if 0 + { + CGAffineTransform textMatrix; + textMatrix = CGAffineTransformMake (font->base.scale.xx, + -font->base.scale.yx, + -font->base.scale.xy, + font->base.scale.yy, + 0.0f, 0.0f); + + bbox = CGRectApplyAffineTransform (bbox, textMatrix); + bbox = CGRectIntegral (bbox); + bbox = CGRectApplyAffineTransform (bbox, CGAffineTransformInvert (textMatrix)); + } +#endif + +#if 0 + fprintf (stderr, "[0x%04x] bbox: %f %f %f %f\n", glyph, + bbox.origin.x / emscale, bbox.origin.y / emscale, + bbox.size.width / emscale, bbox.size.height / emscale); +#endif + + xmin = CGRectGetMinX(bbox); + ymin = CGRectGetMinY(bbox); + xmax = CGRectGetMaxX(bbox); + ymax = CGRectGetMaxY(bbox); + + extents.x_bearing = xmin; + extents.y_bearing = - ymax; + extents.width = xmax - xmin; + extents.height = ymax - ymin; + + extents.x_advance = (double) advance / emscale; + extents.y_advance = 0.0; + +#if 0 + fprintf (stderr, "[0x%04x] extents: bearings: %f %f dim: %f %f adv: %f\n\n", glyph, + extents.x_bearing, extents.y_bearing, extents.width, extents.height, extents.x_advance); +#endif + + FAIL: + _cairo_scaled_glyph_set_metrics (scaled_glyph, + &font->base, + &extents); + + return status; +} + +static void +_cairo_quartz_path_apply_func (void *info, const CGPathElement *el) +{ + cairo_path_fixed_t *path = (cairo_path_fixed_t *) info; + cairo_status_t status; + + switch (el->type) { + case kCGPathElementMoveToPoint: + status = _cairo_path_fixed_move_to (path, + _cairo_fixed_from_double(el->points[0].x), + _cairo_fixed_from_double(el->points[0].y)); + assert(!status); + break; + case kCGPathElementAddLineToPoint: + status = _cairo_path_fixed_line_to (path, + _cairo_fixed_from_double(el->points[0].x), + _cairo_fixed_from_double(el->points[0].y)); + assert(!status); + break; + case kCGPathElementAddQuadCurveToPoint: { + cairo_fixed_t fx, fy; + double x, y; + if (!_cairo_path_fixed_get_current_point (path, &fx, &fy)) + fx = fy = 0; + x = _cairo_fixed_to_double (fx); + y = _cairo_fixed_to_double (fy); + + status = _cairo_path_fixed_curve_to (path, + _cairo_fixed_from_double((x + el->points[0].x * 2.0) / 3.0), + _cairo_fixed_from_double((y + el->points[0].y * 2.0) / 3.0), + _cairo_fixed_from_double((el->points[0].x * 2.0 + el->points[1].x) / 3.0), + _cairo_fixed_from_double((el->points[0].y * 2.0 + el->points[1].y) / 3.0), + _cairo_fixed_from_double(el->points[1].x), + _cairo_fixed_from_double(el->points[1].y)); + } + assert(!status); + break; + case kCGPathElementAddCurveToPoint: + status = _cairo_path_fixed_curve_to (path, + _cairo_fixed_from_double(el->points[0].x), + _cairo_fixed_from_double(el->points[0].y), + _cairo_fixed_from_double(el->points[1].x), + _cairo_fixed_from_double(el->points[1].y), + _cairo_fixed_from_double(el->points[2].x), + _cairo_fixed_from_double(el->points[2].y)); + assert(!status); + break; + case kCGPathElementCloseSubpath: + status = _cairo_path_fixed_close_path (path); + assert(!status); + break; + } +} + +static cairo_int_status_t +_cairo_quartz_init_glyph_path (cairo_quartz_scaled_font_t *font, + cairo_scaled_glyph_t *scaled_glyph) +{ + cairo_quartz_font_face_t *font_face = _cairo_quartz_scaled_to_face(font); + CGGlyph glyph = _cairo_quartz_scaled_glyph_index (scaled_glyph); + CGAffineTransform textMatrix; + CGPathRef glyphPath; + CTFontRef ctFont; + cairo_path_fixed_t *path; + + if (glyph == INVALID_GLYPH) { + _cairo_scaled_glyph_set_path (scaled_glyph, &font->base, _cairo_path_fixed_create()); + return CAIRO_STATUS_SUCCESS; + } + + /* scale(1,-1) * font->base.scale */ + textMatrix = CGAffineTransformMake (font->base.scale.xx, + font->base.scale.yx, + -font->base.scale.xy, + -font->base.scale.yy, + 0, 0); + + ctFont = CTFontCreateWithGraphicsFont (font_face->cgFont, 0.0, NULL, NULL); + glyphPath = CTFontCreatePathForGlyph (ctFont, glyph, &textMatrix); + CFRelease (ctFont); + if (!glyphPath) + return CAIRO_INT_STATUS_UNSUPPORTED; + + path = _cairo_path_fixed_create (); + if (!path) { + CGPathRelease (glyphPath); + return _cairo_error(CAIRO_STATUS_NO_MEMORY); + } + + CGPathApply (glyphPath, path, _cairo_quartz_path_apply_func); + + CGPathRelease (glyphPath); + + _cairo_scaled_glyph_set_path (scaled_glyph, &font->base, path); + + return CAIRO_STATUS_SUCCESS; +} + +static cairo_int_status_t +_cairo_quartz_init_glyph_surface (cairo_quartz_scaled_font_t *font, + cairo_scaled_glyph_t *scaled_glyph) +{ + cairo_int_status_t status = CAIRO_STATUS_SUCCESS; + + cairo_quartz_font_face_t *font_face = _cairo_quartz_scaled_to_face(font); + + cairo_image_surface_t *surface = NULL; + + CGGlyph glyph = _cairo_quartz_scaled_glyph_index (scaled_glyph); + + int advance; + CGRect bbox; + double width, height; + double emscale = CGFontGetUnitsPerEmPtr (font_face->cgFont); + + CGContextRef cgContext = NULL; + CGAffineTransform textMatrix; + CGRect glyphRect, glyphRectInt; + CGPoint glyphOrigin; + + //fprintf (stderr, "scaled_glyph: %p surface: %p\n", scaled_glyph, scaled_glyph->surface); + + /* Create blank 2x2 image if we don't have this character. + * Maybe we should draw a better missing-glyph slug or something, + * but this is ok for now. + */ + if (glyph == INVALID_GLYPH) { + surface = (cairo_image_surface_t*) cairo_image_surface_create (CAIRO_FORMAT_A8, 2, 2); + status = cairo_surface_status ((cairo_surface_t *) surface); + if (status) + return status; + + _cairo_scaled_glyph_set_surface (scaled_glyph, + &font->base, + surface); + return CAIRO_STATUS_SUCCESS; + } + + if (!CGFontGetGlyphAdvancesPtr (font_face->cgFont, &glyph, 1, &advance) || + !CGFontGetGlyphBBoxesPtr (font_face->cgFont, &glyph, 1, &bbox)) + { + return CAIRO_INT_STATUS_UNSUPPORTED; + } + + /* scale(1,-1) * font->base.scale * scale(1,-1) */ + textMatrix = CGAffineTransformMake (font->base.scale.xx, + -font->base.scale.yx, + -font->base.scale.xy, + font->base.scale.yy, + 0, -0); + glyphRect = CGRectMake (bbox.origin.x / emscale, + bbox.origin.y / emscale, + bbox.size.width / emscale, + bbox.size.height / emscale); + + glyphRect = CGRectApplyAffineTransform (glyphRect, textMatrix); + + /* Round the rectangle outwards, so that we don't have to deal + * with non-integer-pixel origins or dimensions. + */ + glyphRectInt = CGRectIntegral (glyphRect); + +#if 0 + fprintf (stderr, "glyphRect[o]: %f %f %f %f\n", + glyphRect.origin.x, glyphRect.origin.y, glyphRect.size.width, glyphRect.size.height); + fprintf (stderr, "glyphRectInt: %f %f %f %f\n", + glyphRectInt.origin.x, glyphRectInt.origin.y, glyphRectInt.size.width, glyphRectInt.size.height); +#endif + + glyphOrigin = glyphRectInt.origin; + + //textMatrix = CGAffineTransformConcat (textMatrix, CGAffineTransformInvert (ctm)); + + width = glyphRectInt.size.width; + height = glyphRectInt.size.height; + + //fprintf (stderr, "glyphRect[n]: %f %f %f %f\n", glyphRect.origin.x, glyphRect.origin.y, glyphRect.size.width, glyphRect.size.height); + + surface = (cairo_image_surface_t*) cairo_image_surface_create (CAIRO_FORMAT_A8, width, height); + if (surface->base.status) + return surface->base.status; + + if (surface->width != 0 && surface->height != 0) { + cgContext = CGBitmapContextCreate (surface->data, + surface->width, + surface->height, + 8, + surface->stride, + NULL, + kCGImageAlphaOnly); + + if (cgContext == NULL) { + cairo_surface_destroy (&surface->base); + return _cairo_error (CAIRO_STATUS_NO_MEMORY); + } + + CGContextSetFont (cgContext, font_face->cgFont); + CGContextSetFontSize (cgContext, 1.0); + CGContextSetTextMatrix (cgContext, textMatrix); + + switch (font->base.options.antialias) { + case CAIRO_ANTIALIAS_SUBPIXEL: + case CAIRO_ANTIALIAS_BEST: + CGContextSetShouldAntialias (cgContext, TRUE); + CGContextSetShouldSmoothFonts (cgContext, TRUE); + if (CGContextSetAllowsFontSmoothingPtr && + !CGContextGetAllowsFontSmoothingPtr (cgContext)) + CGContextSetAllowsFontSmoothingPtr (cgContext, TRUE); + break; + case CAIRO_ANTIALIAS_NONE: + CGContextSetShouldAntialias (cgContext, FALSE); + break; + case CAIRO_ANTIALIAS_GRAY: + case CAIRO_ANTIALIAS_GOOD: + case CAIRO_ANTIALIAS_FAST: + CGContextSetShouldAntialias (cgContext, TRUE); + CGContextSetShouldSmoothFonts (cgContext, FALSE); + break; + case CAIRO_ANTIALIAS_DEFAULT: + default: + /* Don't do anything */ + break; + } + + CGContextSetAlpha (cgContext, 1.0); + CGContextShowGlyphsAtPoint (cgContext, - glyphOrigin.x, - glyphOrigin.y, &glyph, 1); + + CGContextRelease (cgContext); + } + + cairo_surface_set_device_offset (&surface->base, + - glyphOrigin.x, + height + glyphOrigin.y); + + _cairo_scaled_glyph_set_surface (scaled_glyph, &font->base, surface); + + return status; +} + +static cairo_int_status_t +_cairo_quartz_scaled_glyph_init (void *abstract_font, + cairo_scaled_glyph_t *scaled_glyph, + cairo_scaled_glyph_info_t info) +{ + cairo_quartz_scaled_font_t *font = (cairo_quartz_scaled_font_t *) abstract_font; + cairo_int_status_t status = CAIRO_STATUS_SUCCESS; + + if (!status && (info & CAIRO_SCALED_GLYPH_INFO_METRICS)) + status = _cairo_quartz_init_glyph_metrics (font, scaled_glyph); + + if (!status && (info & CAIRO_SCALED_GLYPH_INFO_PATH)) + status = _cairo_quartz_init_glyph_path (font, scaled_glyph); + + if (!status && (info & CAIRO_SCALED_GLYPH_INFO_SURFACE)) + status = _cairo_quartz_init_glyph_surface (font, scaled_glyph); + + return status; +} + +static unsigned long +_cairo_quartz_ucs4_to_index (void *abstract_font, + uint32_t ucs4) +{ + cairo_quartz_scaled_font_t *font = (cairo_quartz_scaled_font_t*) abstract_font; + cairo_quartz_font_face_t *ffont = _cairo_quartz_scaled_to_face(font); + UniChar u = (UniChar) ucs4; + CGGlyph glyph; + + CGFontGetGlyphsForUnicharsPtr (ffont->cgFont, &u, &glyph, 1); + + return glyph; +} + +static cairo_int_status_t +_cairo_quartz_load_truetype_table (void *abstract_font, + unsigned long tag, + long offset, + unsigned char *buffer, + unsigned long *length) +{ + cairo_quartz_font_face_t *font_face = _cairo_quartz_scaled_to_face (abstract_font); + CFDataRef data = NULL; + + if (likely (CGFontCopyTableForTagPtr)) + data = CGFontCopyTableForTagPtr (font_face->cgFont, tag); + + if (!data) + return CAIRO_INT_STATUS_UNSUPPORTED; + + if (buffer == NULL) { + *length = CFDataGetLength (data); + CFRelease (data); + return CAIRO_STATUS_SUCCESS; + } + + if (CFDataGetLength (data) < offset + (long) *length) { + CFRelease (data); + return CAIRO_INT_STATUS_UNSUPPORTED; + } + + CFDataGetBytes (data, CFRangeMake (offset, *length), buffer); + CFRelease (data); + + return CAIRO_STATUS_SUCCESS; +} + +static const cairo_scaled_font_backend_t _cairo_quartz_scaled_font_backend = { + CAIRO_FONT_TYPE_QUARTZ, + _cairo_quartz_scaled_font_fini, + _cairo_quartz_scaled_glyph_init, + NULL, /* text_to_glyphs */ + _cairo_quartz_ucs4_to_index, + _cairo_quartz_load_truetype_table, + NULL, /* map_glyphs_to_unicode */ +}; + +/* + * private methods that the quartz surface uses + */ + +CGFontRef +_cairo_quartz_scaled_font_get_cg_font_ref (cairo_scaled_font_t *abstract_font) +{ + cairo_quartz_font_face_t *ffont = _cairo_quartz_scaled_to_face(abstract_font); + + return ffont->cgFont; +} + +/* + * compat with old ATSUI backend + */ + +/** + * cairo_quartz_font_face_create_for_atsu_font_id: + * @font_id: an ATSUFontID for the font. + * + * Creates a new font for the Quartz font backend based on an + * #ATSUFontID. This font can then be used with + * cairo_set_font_face() or cairo_scaled_font_create(). + * + * Return value: a newly created #cairo_font_face_t. Free with + * cairo_font_face_destroy() when you are done using it. + * + * Since: 1.6 + **/ +cairo_font_face_t * +cairo_quartz_font_face_create_for_atsu_font_id (ATSUFontID font_id) +{ + quartz_font_ensure_symbols(); + + if (FMGetATSFontRefFromFontPtr != NULL) { + ATSFontRef atsFont = FMGetATSFontRefFromFontPtr (font_id); + CGFontRef cgFont = CGFontCreateWithPlatformFont (&atsFont); + cairo_font_face_t *ff; + + ff = cairo_quartz_font_face_create_for_cgfont (cgFont); + + CGFontRelease (cgFont); + + return ff; + } else { + _cairo_error_throw (CAIRO_STATUS_NO_MEMORY); + return (cairo_font_face_t *)&_cairo_font_face_nil; + } +} + +/* This is the old name for the above function, exported for compat purposes */ +cairo_font_face_t *cairo_atsui_font_face_create_for_atsu_font_id (ATSUFontID font_id); + +cairo_font_face_t * +cairo_atsui_font_face_create_for_atsu_font_id (ATSUFontID font_id) +{ + return cairo_quartz_font_face_create_for_atsu_font_id (font_id); +} |