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(RPNG) Uncouple png_reverse_filter_init from png_reverse_filter_regular

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This commit is contained in:
twinaphex 2015-03-13 20:36:48 +01:00
parent 676b6aaad5
commit 6506f6ce85
1 changed files with 25 additions and 12 deletions
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37
libretro-common/formats/png/rpng_decode_common.h
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@ -395,9 +395,6 @@ static bool png_reverse_filter_regular(uint32_t *data, const struct png_ihdr *ih
{
int ret;
if (png_reverse_filter_init(ihdr, pngp) == -1)
return -1;
do{
ret = 1;
@ -451,13 +448,12 @@ static int png_reverse_filter_adam7(uint32_t *data,
goto end;
}
if (png_reverse_filter_init(&pngp->ihdr, pngp) == -1)
goto error;
if (!png_reverse_filter_regular(pngp->data,
&pngp->ihdr, pngp))
{
free(pngp->data);
ret = -1;
goto end;
}
goto error;
pngp->inflate_buf += pngp->pass.size;
pngp->adam7_restore_buf_size += pngp->pass.size;
@ -482,15 +478,27 @@ end:
pngp->adam7_restore_buf_size = 0;
return ret;
error:
if (pngp->data)
free(pngp->data);
pngp->inflate_buf -= pngp->adam7_restore_buf_size;
pngp->adam7_restore_buf_size = 0;
return -1;
}
static bool png_reverse_filter_loop(struct rpng_t *rpng,
uint32_t **data)
{
const struct png_ihdr *ihdr = NULL;
struct rpng_process_t *pngp = NULL;
rpng->process.adam7_restore_buf_size = 0;
rpng->process.restore_buf_size = 0;
rpng->process.palette = rpng->palette;
ihdr = &rpng->ihdr;
pngp = &rpng->process;
if (rpng->ihdr.interlace == 1)
{
int ret = 0;
@ -498,15 +506,20 @@ static bool png_reverse_filter_loop(struct rpng_t *rpng,
do
{
ret = png_reverse_filter_adam7(*data,
&rpng->ihdr, &rpng->process);
ihdr, pngp);
}while(ret == 0);
if (ret == -1)
return false;
}
else if (!png_reverse_filter_regular(*data,
&rpng->ihdr, &rpng->process))
return false;
else
{
if (png_reverse_filter_init(ihdr, pngp) == -1)
return false;
if (!png_reverse_filter_regular(*data,
ihdr, pngp))
return false;
}
return true;
}