static grub_video_color_t
map_color (struct grub_video_mode_info *mode_info, grub_video_color_t color)
{
grub_uint8_t red, green, blue, alpha;
red = green = blue = alpha = 0;
grub_video_unmap_color (color, &red, &green, &blue, &alpha);
return grub_video_fbblit_map_rgba (mode_info, red, green, blue, alpha);
}
/* Draw the specified glyph at (x, y). The y coordinate designates the
baseline of the character, while the x coordinate designates the left
side location of the character. */
grub_err_t
grub_font_draw_glyph (struct grub_font_glyph * glyph,
grub_video_color_t color, int left_x, int baseline_y)
{
struct grub_video_bitmap glyph_bitmap;
/* Don't try to draw empty glyphs (U+0020, etc.). */
if (glyph->width == 0 || glyph->height == 0)
return GRUB_ERR_NONE;
glyph_bitmap.mode_info.width = glyph->width;
glyph_bitmap.mode_info.height = glyph->height;
glyph_bitmap.mode_info.mode_type
= (1 << GRUB_VIDEO_MODE_TYPE_DEPTH_POS) | GRUB_VIDEO_MODE_TYPE_1BIT_BITMAP;
glyph_bitmap.mode_info.blit_format = GRUB_VIDEO_BLIT_FORMAT_1BIT_PACKED;
glyph_bitmap.mode_info.bpp = 1;
/* Really 1 bit per pixel. */
glyph_bitmap.mode_info.bytes_per_pixel = 0;
/* Packed densely as bits. */
glyph_bitmap.mode_info.pitch = glyph->width;
glyph_bitmap.mode_info.number_of_colors = 2;
glyph_bitmap.mode_info.bg_red = 0;
glyph_bitmap.mode_info.bg_green = 0;
glyph_bitmap.mode_info.bg_blue = 0;
glyph_bitmap.mode_info.bg_alpha = 0;
grub_video_unmap_color (color,
&glyph_bitmap.mode_info.fg_red,
&glyph_bitmap.mode_info.fg_green,
&glyph_bitmap.mode_info.fg_blue,
&glyph_bitmap.mode_info.fg_alpha);
glyph_bitmap.data = glyph->bitmap;
int bitmap_left = left_x + glyph->offset_x;
int bitmap_bottom = baseline_y - glyph->offset_y;
int bitmap_top = bitmap_bottom - glyph->height;
return grub_video_blit_bitmap (&glyph_bitmap, GRUB_VIDEO_BLIT_BLEND,
bitmap_left, bitmap_top,
0, 0, glyph->width, glyph->height);
}
