Commit 8d379f17 authored by Simon Glass's avatar Simon Glass
Browse files

lcd: Support colour lookup table on 16bpp display in BMP images



For 16-bit-per-pixel displays it is useful to support 8 bit-per-pixel
images to reduce image size. Add support for this when drawing BMP images.
Signed-off-by: default avatarSimon Glass <sjg@chromium.org>
parent 1c3dbe56
......@@ -578,6 +578,8 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y)
unsigned long width, height, byte_width;
unsigned long pwidth = panel_info.vl_col;
unsigned colors, bpix, bmp_bpix;
int hdr_size;
struct bmp_color_table_entry *palette = bmp->color_table;
if (!bmp || !(bmp->header.signature[0] == 'B' &&
bmp->header.signature[1] == 'M')) {
......@@ -589,6 +591,8 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y)
width = get_unaligned_le32(&bmp->header.width);
height = get_unaligned_le32(&bmp->header.height);
bmp_bpix = get_unaligned_le16(&bmp->header.bit_count);
hdr_size = get_unaligned_le16(&bmp->header.size);
debug("hdr_size=%d, bmp_bpix=%d\n", hdr_size, bmp_bpix);
colors = 1 << bmp_bpix;
......@@ -613,8 +617,8 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y)
return 1;
}
debug("Display-bmp: %d x %d with %d colors\n",
(int)width, (int)height, (int)colors);
debug("Display-bmp: %d x %d with %d colors, display %d\n",
(int)width, (int)height, (int)colors, 1 << bpix);
if (bmp_bpix == 8)
lcd_set_cmap(bmp, colors);
......@@ -641,6 +645,7 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y)
cmap_base = configuration_get_cmap();
#ifdef CONFIG_LCD_BMP_RLE8
u32 compression = get_unaligned_le32(&bmp->header.compression);
debug("compressed %d %d\n", compression, BMP_BI_RLE8);
if (compression == BMP_BI_RLE8) {
if (bpix != 16) {
/* TODO implement render code for bpix != 16 */
......@@ -663,7 +668,19 @@ int lcd_display_bitmap(ulong bmp_image, int x, int y)
if (bpix != 16) {
fb_put_byte(&fb, &bmap);
} else {
*(uint16_t *)fb = cmap_base[*(bmap++)];
struct bmp_color_table_entry *entry;
uint val;
if (cmap_base) {
val = cmap_base[*bmap];
} else {
entry = &palette[*bmap];
val = entry->blue >> 3 |
entry->green >> 2 << 5 |
entry->red >> 3 << 11;
}
*(uint16_t *)fb = val;
bmap++;
fb += sizeof(uint16_t) / sizeof(*fb);
}
}
......
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