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Move prev_scanline/decoded_scanline to rpng_process_t

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This commit is contained in:
twinaphex 2015-02-26 03:54:17 +01:00
parent 0006f0a429
commit 3c2d6020ed
2 changed files with 24 additions and 24 deletions
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46
libretro-common/formats/png/rpng_decode_common.h
View File

@ -97,8 +97,6 @@ static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
unsigned bpp;
unsigned pitch;
size_t pass_size;
uint8_t *prev_scanline = NULL;
uint8_t *decoded_scanline = NULL;
bool ret = true;
png_pass_geom(ihdr, ihdr->width, ihdr->height, &bpp, &pitch, &pass_size);
@ -106,10 +104,10 @@ static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
if (pngp->stream.total_out < pass_size)
return false;
prev_scanline = (uint8_t*)calloc(1, pitch);
decoded_scanline = (uint8_t*)calloc(1, pitch);
pngp->prev_scanline = (uint8_t*)calloc(1, pitch);
pngp->decoded_scanline = (uint8_t*)calloc(1, pitch);
if (!prev_scanline || !decoded_scanline)
if (!pngp->prev_scanline || !pngp->decoded_scanline)
GOTO_END_ERROR();
for (h = 0; h < ihdr->height;
@ -120,40 +118,40 @@ static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
switch (filter)
{
case 0: /* None */
memcpy(decoded_scanline, inflate_buf, pitch);
memcpy(pngp->decoded_scanline, inflate_buf, pitch);
break;
case 1: /* Sub */
for (i = 0; i < bpp; i++)
decoded_scanline[i] = inflate_buf[i];
pngp->decoded_scanline[i] = inflate_buf[i];
for (i = bpp; i < pitch; i++)
decoded_scanline[i] = decoded_scanline[i - bpp] + inflate_buf[i];
pngp->decoded_scanline[i] = pngp->decoded_scanline[i - bpp] + inflate_buf[i];
break;
case 2: /* Up */
for (i = 0; i < pitch; i++)
decoded_scanline[i] = prev_scanline[i] + inflate_buf[i];
pngp->decoded_scanline[i] = pngp->prev_scanline[i] + inflate_buf[i];
break;
case 3: /* Average */
for (i = 0; i < bpp; i++)
{
uint8_t avg = prev_scanline[i] >> 1;
decoded_scanline[i] = avg + inflate_buf[i];
uint8_t avg = pngp->prev_scanline[i] >> 1;
pngp->decoded_scanline[i] = avg + inflate_buf[i];
}
for (i = bpp; i < pitch; i++)
{
uint8_t avg = (decoded_scanline[i - bpp] + prev_scanline[i]) >> 1;
decoded_scanline[i] = avg + inflate_buf[i];
uint8_t avg = (pngp->decoded_scanline[i - bpp] + pngp->prev_scanline[i]) >> 1;
pngp->decoded_scanline[i] = avg + inflate_buf[i];
}
break;
case 4: /* Paeth */
for (i = 0; i < bpp; i++)
decoded_scanline[i] = paeth(0, prev_scanline[i], 0) + inflate_buf[i];
pngp->decoded_scanline[i] = paeth(0, pngp->prev_scanline[i], 0) + inflate_buf[i];
for (i = bpp; i < pitch; i++)
decoded_scanline[i] = paeth(decoded_scanline[i - bpp],
prev_scanline[i], prev_scanline[i - bpp]) + inflate_buf[i];
pngp->decoded_scanline[i] = paeth(pngp->decoded_scanline[i - bpp],
pngp->prev_scanline[i], pngp->prev_scanline[i - bpp]) + inflate_buf[i];
break;
default:
@ -161,24 +159,24 @@ static bool png_reverse_filter(uint32_t *data, const struct png_ihdr *ihdr,
}
if (ihdr->color_type == 0)
copy_line_bw(data, decoded_scanline, ihdr->width, ihdr->depth);
copy_line_bw(data, pngp->decoded_scanline, ihdr->width, ihdr->depth);
else if (ihdr->color_type == 2)
copy_line_rgb(data, decoded_scanline, ihdr->width, ihdr->depth);
copy_line_rgb(data, pngp->decoded_scanline, ihdr->width, ihdr->depth);
else if (ihdr->color_type == 3)
copy_line_plt(data, decoded_scanline, ihdr->width,
copy_line_plt(data, pngp->decoded_scanline, ihdr->width,
ihdr->depth, palette);
else if (ihdr->color_type == 4)
copy_line_gray_alpha(data, decoded_scanline, ihdr->width,
copy_line_gray_alpha(data, pngp->decoded_scanline, ihdr->width,
ihdr->depth);
else if (ihdr->color_type == 6)
copy_line_rgba(data, decoded_scanline, ihdr->width, ihdr->depth);
copy_line_rgba(data, pngp->decoded_scanline, ihdr->width, ihdr->depth);
memcpy(prev_scanline, decoded_scanline, pitch);
memcpy(pngp->prev_scanline, pngp->decoded_scanline, pitch);
}
end:
free(decoded_scanline);
free(prev_scanline);
free(pngp->decoded_scanline);
free(pngp->prev_scanline);
return ret;
}

2
libretro-common/include/formats/rpng.h
View File

@ -63,6 +63,8 @@ struct png_ihdr
struct rpng_process_t
{
uint8_t *prev_scanline;
uint8_t *decoded_scanline;
uint8_t *inflate_buf;
size_t inflate_buf_size;
z_stream stream;