Faster binary search

This commit is contained in:
Clownacy 2020-09-18 02:55:45 +01:00
parent 729565b5ca
commit f2c0f94e42

View file

@ -1073,37 +1073,34 @@ static Glyph* GetGlyph(Font *font, unsigned long unicode_value)
size_t left = 0;
size_t right = font->total_local_glyphs;
for (;;)
while (right - left >= 2)
{
size_t index = (left + right) / 2;
const size_t index = (left + right) / 2;
if (font->local_glyphs[index].unicode_value == unicode_value)
{
const Glyph *local_glyph = &font->local_glyphs[index];
glyph->unicode_value = local_glyph->unicode_value;
glyph->width = font->glyph_slot_width;
glyph->height = font->glyph_slot_height;
glyph->x_offset = 0;
glyph->y_offset = 0;
glyph->x_advance = local_glyph->x_advance;
RenderBackend_UploadGlyph(font->atlas, glyph->x, glyph->y, &font->image_buffer[local_glyph->y * font->image_buffer_width + local_glyph->x], glyph->width, glyph->height, font->image_buffer_width);
*glyph_pointer = glyph->next;
glyph->next = font->glyph_list_head;
font->glyph_list_head = glyph;
return glyph;
}
if (index == left)
break;
if (font->local_glyphs[index].unicode_value < unicode_value)
left = index;
else //if (font->local_glyphs[index].unicode_value > unicode_value)
if (font->local_glyphs[index].unicode_value > unicode_value)
right = index;
else
left = index;
}
if (font->local_glyphs[left].unicode_value == unicode_value)
{
const Glyph *local_glyph = &font->local_glyphs[left];
glyph->unicode_value = local_glyph->unicode_value;
glyph->width = font->glyph_slot_width;
glyph->height = font->glyph_slot_height;
glyph->x_offset = 0;
glyph->y_offset = 0;
glyph->x_advance = local_glyph->x_advance;
RenderBackend_UploadGlyph(font->atlas, glyph->x, glyph->y, &font->image_buffer[local_glyph->y * font->image_buffer_width + local_glyph->x], glyph->width, glyph->height, font->image_buffer_width);
*glyph_pointer = glyph->next;
glyph->next = font->glyph_list_head;
font->glyph_list_head = glyph;
return glyph;
}
#endif