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Start creating png_reverse_filter_wrapper

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This commit is contained in:
twinaphex 2015-02-26 07:40:11 +01:00
parent de95f0cc1d
commit a7d4b0e8bc
1 changed files with 35 additions and 8 deletions
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43
libretro-common/formats/png/rpng_decode_common.h
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@ -128,19 +128,28 @@ error:
return false;
}
static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
static int png_reverse_filter_wrapper(uint32_t *data, const struct png_ihdr *ihdr,
const uint8_t *inflate_buf, struct rpng_process_t *pngp,
const uint32_t *palette)
{
unsigned i;
bool ret = true;
bool cont = true;
if (!pngp)
return -1;
if (!pngp->pass_initialized)
if (!png_reverse_filter_init(data, ihdr, inflate_buf, pngp, palette))
return false;
return -1;
for (; pngp->h < ihdr->height;
pngp->h++, inflate_buf += pngp->pitch, data += ihdr->width)
cont = pngp->h < ihdr->height;
if (!cont)
{
png_reverse_filter_deinit(pngp);
return 1;
}
for (; pngp->h < ihdr->height; )
{
unsigned filter = *inflate_buf++;
@ -184,7 +193,7 @@ static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
break;
default:
GOTO_END_ERROR();
goto error;
}
if (ihdr->color_type == 0)
@ -201,11 +210,29 @@ static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
copy_line_rgba(data, pngp->decoded_scanline, ihdr->width, ihdr->depth);
memcpy(pngp->prev_scanline, pngp->decoded_scanline, pngp->pitch);
pngp->h++;
inflate_buf += pngp->pitch;
data += ihdr->width;
}
end:
return 0;
error:
png_reverse_filter_deinit(pngp);
return ret;
return -1;
}
static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
const uint8_t *inflate_buf, struct rpng_process_t *pngp,
const uint32_t *palette)
{
int ret;
while((ret = png_reverse_filter_wrapper(data,
ihdr, inflate_buf, pngp, palette)) == 0);
if (ret == 1)
return true;
return false;
}
static bool png_reverse_filter_adam7(uint32_t *data,