inline void FontCache::render_text(int font_id, bool grid_fitting, Direction dir,
int num_glyphs, const int* glyphs, const float* components,
image::ImageWriter& img_writer)
{
BearingType bearing_type;
CoordType coord_type;
switch (dir) {
case dir_LeftToRight:
bearing_type = bearing_Left;
coord_type = coord_Hori;
goto render;
case dir_RightToLeft:
bearing_type = bearing_Right;
coord_type = coord_Hori;
goto render;
case dir_BottomToTop:
bearing_type = bearing_Below;
coord_type = coord_Vert;
goto render;
case dir_TopToBottom:
bearing_type = bearing_Above;
coord_type = coord_Vert;
goto render;
}
return;
render:
render_glyphs(font_id, grid_fitting, bearing_type, coord_type,
num_glyphs, glyphs, components, img_writer);
}
static cairo_int_status_t
render_glyphs_via_mask (cairo_gl_surface_t *dst,
int dst_x, int dst_y,
cairo_operator_t op,
cairo_surface_t *source,
cairo_composite_glyphs_info_t *info)
{
cairo_surface_t *mask;
cairo_status_t status;
cairo_bool_t has_component_alpha;
TRACE ((stderr, "%s\n", __FUNCTION__));
/* XXX: For non-CA, this should be CAIRO_CONTENT_ALPHA to save memory */
mask = cairo_gl_surface_create (dst->base.device,
CAIRO_CONTENT_COLOR_ALPHA,
info->extents.width,
info->extents.height);
if (unlikely (mask->status))
return mask->status;
status = render_glyphs ((cairo_gl_surface_t *) mask,
info->extents.x, info->extents.y,
CAIRO_OPERATOR_ADD, NULL,
info, &has_component_alpha);
if (likely (status == CAIRO_STATUS_SUCCESS)) {
cairo_surface_pattern_t mask_pattern;
cairo_surface_pattern_t source_pattern;
mask->is_clear = FALSE;
_cairo_pattern_init_for_surface (&mask_pattern, mask);
mask_pattern.base.has_component_alpha = has_component_alpha;
mask_pattern.base.filter = CAIRO_FILTER_NEAREST;
mask_pattern.base.extend = CAIRO_EXTEND_NONE;
cairo_matrix_init_translate (&mask_pattern.base.matrix,
dst_x-info->extents.x, dst_y-info->extents.y);
_cairo_pattern_init_for_surface (&source_pattern, source);
cairo_matrix_init_translate (&source_pattern.base.matrix,
dst_x-info->extents.x, dst_y-info->extents.y);
status = _cairo_surface_mask (&dst->base, op,
&source_pattern.base,
&mask_pattern.base,
NULL);
_cairo_pattern_fini (&mask_pattern.base);
_cairo_pattern_fini (&source_pattern.base);
}
cairo_surface_destroy (mask);
return status;
}
cairo_int_status_t
_cairo_gl_composite_glyphs (void *_dst,
cairo_operator_t op,
cairo_surface_t *_src,
int src_x,
int src_y,
int dst_x,
int dst_y,
cairo_composite_glyphs_info_t *info)
{
cairo_gl_surface_t *dst = _dst;
cairo_bool_t has_component_alpha;
int i;
TRACE ((stderr, "%s\n", __FUNCTION__));
/* If any of the glyphs are component alpha, we have to go through a mask,
* since only _cairo_gl_surface_composite() currently supports component
* alpha.
*/
if (!dst->base.is_clear && ! info->use_mask && op != CAIRO_OPERATOR_OVER) {
for (i = 0; i < info->num_glyphs; i++) {
cairo_scaled_glyph_t *scaled_glyph;
if (_cairo_scaled_glyph_lookup (info->font, info->glyphs[i].index,
CAIRO_SCALED_GLYPH_INFO_SURFACE,
&scaled_glyph) == CAIRO_INT_STATUS_SUCCESS &&
scaled_glyph->surface->format == CAIRO_FORMAT_ARGB32)
{
info->use_mask = TRUE;
break;
}
}
}
if (info->use_mask) {
return render_glyphs_via_mask (dst, dst_x, dst_y,
op, _src, info);
} else {
return render_glyphs (dst, dst_x, dst_y,
op, _src, info,
&has_component_alpha);
}
}
cairo_int_status_t
_cairo_gl_composite_glyphs_with_clip (void *_dst,
cairo_operator_t op,
cairo_surface_t *_src,
int src_x,
int src_y,
int dst_x,
int dst_y,
cairo_composite_glyphs_info_t *info,
cairo_clip_t *clip,
cairo_bool_t via_msaa_compositor)
{
cairo_gl_surface_t *dst = _dst;
cairo_bool_t has_component_alpha;
TRACE ((stderr, "%s\n", __FUNCTION__));
/* If any of the glyphs require component alpha, we have to go through
* a mask, since only _cairo_gl_surface_composite() currently supports
* component alpha.
*/
if (!dst->base.is_clear && ! info->use_mask && op != CAIRO_OPERATOR_OVER &&
(info->font->options.antialias == CAIRO_ANTIALIAS_SUBPIXEL ||
info->font->options.antialias == CAIRO_ANTIALIAS_BEST))
{
info->use_mask = TRUE;
}
if (info->use_mask) {
return render_glyphs_via_mask (dst, dst_x, dst_y,
op, _src, info, clip,
via_msaa_compositor);
} else {
return render_glyphs (dst, dst_x, dst_y,
op, _src, info,
&has_component_alpha,
clip,
via_msaa_compositor);
}
}
