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[COLR] Optimize palette access

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This commit is contained in:
Behdad Esfahbod 2025-02-18 20:01:36 -07:00
parent 016e78b683
commit ed76c8559e
2 changed files with 13 additions and 6 deletions
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11
src/OT/Color/COLR/COLR.hh
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@ -34,6 +34,8 @@
#include "../../../hb-paint.hh"
#include "../../../hb-paint-extents.hh"
#include "../CPAL/CPAL.hh"
/*
* COLR -- Color
* https://docs.microsoft.com/en-us/typography/opentype/spec/colr
@ -66,7 +68,7 @@ public:
hb_paint_funcs_t *funcs;
void *data;
hb_font_t *font;
unsigned int palette_index;
hb_array_t<const BGRAColor> palette;
hb_color_t foreground;
ItemVarStoreInstancer &instancer;
hb_map_t current_glyphs;
@ -85,7 +87,7 @@ public:
funcs (funcs_),
data (data_),
font (font_),
palette_index (palette_),
palette (font->face->table.CPAL->get_palette_colors (palette_)),
foreground (foreground_),
instancer (instancer_)
{ }
@ -99,10 +101,7 @@ public:
if (color_index != 0xffff)
{
if (!funcs->custom_palette_color (data, color_index, &color))
{
unsigned int clen = 1;
hb_ot_color_palette_get_colors (font->face, palette_index, color_index, &clen, &color);
}
color = palette[color_index];
*is_foreground = false;
}

8
src/OT/Color/CPAL/CPAL.hh
View file

@ -187,6 +187,14 @@ struct CPAL
hb_ot_name_id_t get_color_name_id (unsigned int color_index) const
{ return v1 ().get_color_name_id (this, color_index, numColors); }
hb_array_t<const BGRAColor> get_palette_colors (unsigned int palette_index) const
{
if (unlikely (palette_index >= numPalettes))
return hb_array_t<const BGRAColor> ();
unsigned int start_index = colorRecordIndicesZ[palette_index];
hb_array_t<const BGRAColor> all_colors ((this+colorRecordsZ).arrayZ, numColorRecords);
return all_colors.sub_array (start_index, numColors);
}
unsigned int get_palette_colors (unsigned int palette_index,
unsigned int start_offset,
unsigned int *color_count, /* IN/OUT. May be NULL. */