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Fix the bug in ApplyPalette.

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The auto-infer logic of detecting the 'Alpha' use case
(via check '(palette[i] & 0x00ff00ffu) != 0' is failing
for this corner case image with all black pixels (rgb = 0)
and different Alpha values.

-> switch generic use-LUT detection

Change-Id: I982a8b28c8bcc43e3dc68ac358f978a4bcc14c36
This commit is contained in:
skal 2013-05-18 17:03:18 +02:00
parent 2d6ac422cf
commit afa3450c11
1 changed files with 4 additions and 4 deletions
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8
src/enc/vp8l.c
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@ -816,15 +816,15 @@ static void ApplyPalette(uint32_t* src, uint32_t* dst,
const uint32_t* palette, int palette_size,
int width, int height, int xbits, uint8_t* row) {
int i, x, y;
int is_alpha = 1;
int use_LUT = 1;
for (i = 0; i < palette_size; ++i) {
if ((palette[i] & 0x00ff00ffu) != 0) {
is_alpha = 0;
if ((palette[i] & 0xffff00ffu) != 0) {
use_LUT = 0;
break;
}
}
if (is_alpha) {
if (use_LUT) {
int inv_palette[MAX_PALETTE_SIZE] = { 0 };
for (i = 0; i < palette_size; ++i) {
const int color = (palette[i] >> 8) & 0xff;