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_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 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 xscale, yscale;
double emscale = CGFontGetUnitsPerEmPtr (font_face->cgFont);
CGColorSpaceRef gray;
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;
}
status = _cairo_matrix_compute_basis_scale_factors (&font->base.scale,
&xscale, &yscale, 1);
if (status)
return status;
textMatrix = CGAffineTransformMake (font->base.scale.xx,
-font->base.scale.yx,
-font->base.scale.xy,
font->base.scale.yy,
0.0f, 0.0f);
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;
gray = CGColorSpaceCreateDeviceGray ();
cgContext = CGBitmapContextCreate (surface->data,
surface->width,
surface->height,
8,
surface->stride,
gray,
kCGImageAlphaNone);
CGColorSpaceRelease (gray);
CGContextSetFont (cgContext, font_face->cgFont);
CGContextSetFontSize (cgContext, 1.0);
CGContextSetTextMatrix (cgContext, textMatrix);
CGContextClearRect (cgContext, CGRectMake (0.0f, 0.0f, width, height));
if (font->base.options.antialias == CAIRO_ANTIALIAS_NONE)
CGContextSetShouldAntialias (cgContext, false);
CGContextSetRGBFillColor (cgContext, 1.0, 1.0, 1.0, 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_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;
}
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};
CGAffineTransform textMatrix;
CGGlyph glyph = _cairo_quartz_scaled_glyph_index (scaled_glyph);
int advance;
CGRect bbox;
double emscale = CGFontGetUnitsPerEmPtr (font_face->cgFont);
double xscale, yscale;
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;
status = _cairo_matrix_compute_basis_scale_factors (&font->base.scale,
&xscale, &yscale, 1);
if (status)
goto FAIL;
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;
}
