struct grub_font_glyph *
grub_font_construct_glyph (grub_font_t hinted_font,
const struct grub_unicode_glyph *glyph_id)
{
struct grub_font_glyph *main_glyph;
struct grub_video_signed_rect bounds;
struct grub_font_glyph *glyph;
struct grub_font_glyph **combining_glyphs;
main_glyph = grub_font_construct_dry_run (hinted_font, glyph_id,
&bounds, &combining_glyphs, NULL);
if (!main_glyph)
return grub_font_dup_glyph (unknown_glyph);
if (!combining_glyphs)
return grub_font_dup_glyph (main_glyph);
glyph =
grub_zalloc (sizeof (*glyph) + (bounds.width * bounds.height + 7) / 8);
if (!glyph)
{
grub_errno = GRUB_ERR_NONE;
return grub_font_dup_glyph (main_glyph);
}
glyph->font = main_glyph->font;
glyph->width = bounds.width;
glyph->height = bounds.height;
glyph->offset_x = bounds.x;
glyph->offset_y = bounds.y;
if (glyph_id->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR)
grub_font_blit_glyph_mirror (glyph, main_glyph,
main_glyph->offset_x - glyph->offset_x,
(glyph->height + glyph->offset_y)
- (main_glyph->height +
main_glyph->offset_y));
else
grub_font_blit_glyph (glyph, main_glyph,
main_glyph->offset_x - glyph->offset_x,
(glyph->height + glyph->offset_y)
- (main_glyph->height + main_glyph->offset_y));
blit_comb (glyph_id, glyph, NULL, main_glyph, combining_glyphs, NULL);
return glyph;
}
/* Helper for blit_comb. */
static void
do_blit (struct grub_font_glyph *src, signed dx, signed dy,
struct blit_comb_ctx *ctx)
{
if (ctx->glyph)
grub_font_blit_glyph (ctx->glyph, src, dx - ctx->glyph->offset_x,
(ctx->glyph->height + ctx->glyph->offset_y) + dy);
if (dx < ctx->bounds.x)
{
ctx->bounds.width += ctx->bounds.x - dx;
ctx->bounds.x = dx;
}
if (ctx->bounds.y > -src->height - dy)
{
ctx->bounds.height += ctx->bounds.y - (-src->height - dy);
ctx->bounds.y = (-src->height - dy);
}
if (dx + src->width - ctx->bounds.x >= (signed) ctx->bounds.width)
ctx->bounds.width = dx + src->width - ctx->bounds.x + 1;
if ((signed) ctx->bounds.height < src->height + (-src->height - dy)
- ctx->bounds.y)
ctx->bounds.height = src->height + (-src->height - dy) - ctx->bounds.y;
}
struct grub_font_glyph *
grub_font_construct_glyph (grub_font_t hinted_font,
const struct grub_unicode_glyph *glyph_id)
{
struct grub_font_glyph *main_glyph;
struct grub_video_signed_rect bounds;
static struct grub_font_glyph *glyph = 0;
static grub_size_t max_glyph_size = 0;
ensure_comb_space (glyph_id);
main_glyph = grub_font_construct_dry_run (hinted_font, glyph_id,
&bounds, render_combining_glyphs,
NULL);
if (!main_glyph)
return unknown_glyph;
if (!render_combining_glyphs && glyph_id->ncomb)
return main_glyph;
if (!glyph_id->ncomb && !glyph_id->attributes)
return main_glyph;
if (max_glyph_size < sizeof (*glyph) + (bounds.width * bounds.height + GRUB_CHAR_BIT - 1) / GRUB_CHAR_BIT)
{
grub_free (glyph);
max_glyph_size = (sizeof (*glyph) + (bounds.width * bounds.height + GRUB_CHAR_BIT - 1) / GRUB_CHAR_BIT) * 2;
if (max_glyph_size < 8)
max_glyph_size = 8;
glyph = grub_malloc (max_glyph_size);
}
if (!glyph)
{
grub_errno = GRUB_ERR_NONE;
return main_glyph;
}
grub_memset (glyph, 0, sizeof (*glyph)
+ (bounds.width * bounds.height
+ GRUB_CHAR_BIT - 1) / GRUB_CHAR_BIT);
glyph->font = main_glyph->font;
glyph->width = bounds.width;
glyph->height = bounds.height;
glyph->offset_x = bounds.x;
glyph->offset_y = bounds.y;
if (glyph_id->attributes & GRUB_UNICODE_GLYPH_ATTRIBUTE_MIRROR)
grub_font_blit_glyph_mirror (glyph, main_glyph,
main_glyph->offset_x - glyph->offset_x,
(glyph->height + glyph->offset_y)
- (main_glyph->height +
main_glyph->offset_y));
else
grub_font_blit_glyph (glyph, main_glyph,
main_glyph->offset_x - glyph->offset_x,
(glyph->height + glyph->offset_y)
- (main_glyph->height + main_glyph->offset_y));
blit_comb (glyph_id, glyph, NULL, main_glyph, render_combining_glyphs, NULL);
return glyph;
}