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Linux: Fix rendering of emoji when using scalable fonts such as Segoe UI Emoji

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Kovid Goyal
2022-02-06 13:20:55 +05:30
parent f047678711
commit dddff91fad
3 changed files with 17 additions and 14 deletions
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25
kitty/freetype.c
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@@ -522,19 +522,20 @@ detect_right_edge(ProcessedBitmap *ans) {
static bool
render_color_bitmap(Face *self, int glyph_id, ProcessedBitmap *ans, unsigned int cell_width, unsigned int cell_height, unsigned int num_cells, unsigned int baseline UNUSED) {
unsigned short best = 0, diff = USHRT_MAX;
const short limit = self->face->num_fixed_sizes;
for (short i = 0; i < limit; i++) {
unsigned short w = self->face->available_sizes[i].width;
unsigned short d = w > (unsigned short)cell_width ? w - (unsigned short)cell_width : (unsigned short)cell_width - w;
if (d < diff) {
diff = d;
best = i;
if (self->face->num_fixed_sizes > 0) {
const short limit = self->face->num_fixed_sizes;
for (short i = 0; i < limit; i++) {
unsigned short w = self->face->available_sizes[i].width;
unsigned short d = w > (unsigned short)cell_width ? w - (unsigned short)cell_width : (unsigned short)cell_width - w;
if (d < diff) {
diff = d;
best = i;
}
}
}
FT_Error error = FT_Select_Size(self->face, best);
if (error) { set_freetype_error("Failed to set char size for non-scalable font, with error:", error); return false; }
if (!load_glyph(self, glyph_id, FT_LOAD_COLOR)) return false;
FT_Set_Char_Size(self->face, 0, self->char_height, self->xdpi, self->ydpi);
FT_Error error = FT_Select_Size(self->face, best);
if (error) { set_freetype_error("Failed to set char size for non-scalable font, with error:", error); return false; }
} else FT_Set_Char_Size(self->face, 0, self->char_height, self->xdpi, self->ydpi);
if (!load_glyph(self, glyph_id, FT_LOAD_COLOR | FT_LOAD_RENDER)) return false;
FT_Bitmap *bitmap = &self->face->glyph->bitmap;
if (bitmap->pixel_mode != FT_PIXEL_MODE_BGRA) return false;
ans->buf = bitmap->buffer;