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Fix text display issues when using Japanese (and other unicode-dependent language) text with stb_unicode

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This commit is contained in:
jdgleaver 2019-04-09 15:51:33 +01:00
parent f718b3558f
commit 136762f6a2
1 changed files with 15 additions and 4 deletions
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19
gfx/drivers_font_renderer/stb_unicode.c
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@ -152,11 +152,22 @@ static const struct font_glyph *font_renderer_stb_unicode_get_glyph(
dst = (uint8_t*)self->atlas.buffer + atlas_slot->glyph.atlas_offset_x
+ atlas_slot->glyph.atlas_offset_y * self->atlas.width;
stbtt_MakeGlyphBitmap(&self->info, dst, self->max_glyph_width, self->max_glyph_height,
self->atlas.width, self->scale_factor, self->scale_factor, glyph_index);
stbtt_GetGlyphHMetrics(&self->info, glyph_index, &advance_width, &left_side_bearing);
stbtt_GetGlyphBox(&self->info, glyph_index, &x0, NULL, NULL, &y1);
if (stbtt_GetGlyphBox(&self->info, glyph_index, &x0, NULL, NULL, &y1))
{
stbtt_MakeGlyphBitmap(&self->info, dst, self->max_glyph_width, self->max_glyph_height,
self->atlas.width, self->scale_factor, self->scale_factor, glyph_index);
}
else
{
/* This means the glyph is empty. In this case, stbtt_MakeGlyphBitmap()
* fills the corresponding region of the atlas buffer with garbage,
* so just zero it */
unsigned x, y;
for (x = 0; x < self->max_glyph_width; x++)
for (y = 0; y < self->max_glyph_height; y++)
dst[x + (y * self->atlas.width)] = 0;
}
atlas_slot->glyph.width = self->max_glyph_width;
atlas_slot->glyph.height = self->max_glyph_height;