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[ft] Paint COLRv0 glyphs

This commit is contained in:
Behdad Esfahbod 2022-12-22 11:26:10 -07:00
parent bb807f47d2
commit 72a169c846
1 changed files with 62 additions and 11 deletions
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71
src/hb-ft.cc
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@ -45,6 +45,7 @@
#include FT_MULTIPLE_MASTERS_H
#include FT_OUTLINE_H
#include FT_TRUETYPE_TABLES_H
#include FT_COLOR_H
/**
@ -818,31 +819,81 @@ hb_ft_paint_glyph (hb_font_t *font,
void *font_data,
hb_codepoint_t gid,
hb_paint_funcs_t *paint_funcs, void *paint_data,
unsigned int palette,
unsigned int palette_index,
hb_color_t foreground,
void *user_data)
{
const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
FT_Glyph_Format format;
/* Release lock before calling into callbacks, such that
* eg. draw API can call back into the face.*/
{
hb_lock_t lock (ft_font->lock);
FT_Face ft_face = ft_font->ft_face;
/* We release the lock before calling into callbacks, such that
* eg. draw API can call back into the face.*/
if (unlikely (FT_Load_Glyph (ft_face, gid, ft_font->load_flags)))
return;
format = ft_face->glyph->format;
if (ft_face->glyph->format == FT_GLYPH_FORMAT_OUTLINE)
{
/* COLRv0 */
{
FT_Error error;
FT_Color* palette;
FT_LayerIterator iterator;
FT_Bool have_layers;
FT_UInt layer_glyph_index;
FT_UInt layer_color_index;
error = FT_Palette_Select(ft_face, palette_index, &palette);
if ( error )
palette = NULL;
iterator.p = NULL;
have_layers = FT_Get_Color_Glyph_Layer(ft_face,
gid,
&layer_glyph_index,
&layer_color_index,
&iterator);
if (palette && have_layers)
{
do
{
hb_bool_t is_foreground = true;
hb_color_t color = foreground;
if ( layer_color_index != 0xFFFF )
{
FT_Color layer_color = palette[layer_color_index];
color = HB_COLOR (layer_color.blue,
layer_color.green,
layer_color.red,
layer_color.alpha);
is_foreground = false;
}
if (format == FT_GLYPH_FORMAT_OUTLINE)
{
ft_font->lock.unlock ();
paint_funcs->push_clip_glyph (paint_data, layer_glyph_index, font);
paint_funcs->color (paint_data, is_foreground, color);
paint_funcs->pop_clip (paint_data);
ft_font->lock.lock ();
} while (FT_Get_Color_Glyph_Layer(ft_face,
gid,
&layer_glyph_index,
&layer_color_index,
&iterator));
return;
}
}
/* Simple outline. */
ft_font->lock.unlock ();
paint_funcs->push_clip_glyph (paint_data, gid, font);
paint_funcs->color (paint_data, true, foreground);
paint_funcs->pop_clip (paint_data);
ft_font->lock.lock ();
return;
}