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tiff: set palette in the context when specified in TIFF_PAL tag

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Since image initialization was moved after tag parsing, the
palette needs to be specified in the context and then copied
to the allocated image in init_image().

Fixes a regression with TIFF images that have palette data,
trac issue #230, file Test_Flate_8bpp.tif.

Signed-off-by: Diego Biurrun <diego@biurrun.de>
This commit is contained in:
Stefano Sabatini 2011-05-24 01:17:25 +02:00 committed by Diego Biurrun
parent 4515f9b58a
commit 7ca5338b49
1 changed files with 13 additions and 10 deletions
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23
libavcodec/tiff.c
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@ -41,6 +41,8 @@ typedef struct TiffContext {
int width, height;
unsigned int bpp, bppcount;
uint32_t palette[256];
int palette_is_set;
int le;
enum TiffCompr compr;
int invert;
@ -257,11 +259,15 @@ static int init_image(TiffContext *s)
av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
return ret;
}
if (s->bpp == 8 && s->picture.data[1]){
/* make default grayscale pal */
pal = (uint32_t *) s->picture.data[1];
for (i = 0; i < 256; i++)
pal[i] = i * 0x010101;
if (s->avctx->pix_fmt == PIX_FMT_PAL8) {
if (s->palette_is_set) {
memcpy(s->picture.data[1], s->palette, sizeof(s->palette));
} else {
/* make default grayscale pal */
pal = (uint32_t *) s->picture.data[1];
for (i = 0; i < 256; i++)
pal[i] = i * 0x010101;
}
}
return 0;
}
@ -444,11 +450,7 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
s->fill_order = value - 1;
break;
case TIFF_PAL:
if(s->avctx->pix_fmt != PIX_FMT_PAL8){
av_log(s->avctx, AV_LOG_ERROR, "Palette met but this is not palettized format\n");
return -1;
}
pal = (uint32_t *) s->picture.data[1];
pal = (uint32_t *) s->palette;
off = type_sizes[type];
rp = buf;
gp = buf + count / 3 * off;
@ -460,6 +462,7 @@ static int tiff_decode_tag(TiffContext *s, const uint8_t *start, const uint8_t *
j |= tget(&bp, type, s->le) >> off;
pal[i] = j;
}
s->palette_is_set = 1;
break;
case TIFF_PLANAR:
if(value == 2){