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(RPNG optimizations)

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- Use memcpy to inflate_buf into array
- Some miscellaneous tweaks
This commit is contained in:
LibretroAdmin 2022-08-02 15:17:37 +02:00
parent 8105688a99
commit 342d3da620
1 changed files with 18 additions and 19 deletions
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37
libretro-common/formats/png/rpng.c
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@ -566,35 +566,36 @@ static int png_reverse_filter_copy_line(uint32_t *data, const struct png_ihdr *i
memcpy(pngp->decoded_scanline, pngp->inflate_buf, pngp->pitch);
break;
case PNG_FILTER_SUB:
for (i = 0; i < pngp->bpp; i++)
pngp->decoded_scanline[i] = pngp->inflate_buf[i];
memcpy(pngp->decoded_scanline, pngp->inflate_buf, pngp->pitch);
for (i = pngp->bpp; i < pngp->pitch; i++)
pngp->decoded_scanline[i] = pngp->decoded_scanline[i - pngp->bpp] + pngp->inflate_buf[i];
pngp->decoded_scanline[i] += pngp->decoded_scanline[i - pngp->bpp];
break;
case PNG_FILTER_UP:
memcpy(pngp->decoded_scanline, pngp->inflate_buf, pngp->pitch);
for (i = 0; i < pngp->pitch; i++)
pngp->decoded_scanline[i] = pngp->prev_scanline[i] + pngp->inflate_buf[i];
pngp->decoded_scanline[i] += pngp->prev_scanline[i];
break;
case PNG_FILTER_AVERAGE:
memcpy(pngp->decoded_scanline, pngp->inflate_buf, pngp->pitch);
for (i = 0; i < pngp->bpp; i++)
{
uint8_t avg = pngp->prev_scanline[i] >> 1;
pngp->decoded_scanline[i] = avg + pngp->inflate_buf[i];
pngp->decoded_scanline[i] += avg;
}
for (i = pngp->bpp; i < pngp->pitch; i++)
{
uint8_t avg = (pngp->decoded_scanline[i - pngp->bpp] + pngp->prev_scanline[i]) >> 1;
pngp->decoded_scanline[i] = avg + pngp->inflate_buf[i];
pngp->decoded_scanline[i] += avg;
}
break;
case PNG_FILTER_PAETH:
memcpy(pngp->decoded_scanline, pngp->inflate_buf, pngp->pitch);
for (i = 0; i < pngp->bpp; i++)
pngp->decoded_scanline[i] = pngp->prev_scanline[i] + pngp->inflate_buf[i];
pngp->decoded_scanline[i] += pngp->prev_scanline[i];
for (i = pngp->bpp; i < pngp->pitch; i++)
pngp->decoded_scanline[i] = paeth(pngp->decoded_scanline[i - pngp->bpp],
pngp->prev_scanline[i], pngp->prev_scanline[i - pngp->bpp]) + pngp->inflate_buf[i];
pngp->decoded_scanline[i] += paeth(pngp->decoded_scanline[i - pngp->bpp],
pngp->prev_scanline[i], pngp->prev_scanline[i - pngp->bpp]);
break;
default:
return IMAGE_PROCESS_ERROR_END;
}
@ -629,16 +630,16 @@ static int png_reverse_filter_regular_iterate(uint32_t **data, const struct png_
struct rpng_process *pngp)
{
int ret = IMAGE_PROCESS_END;
if (pngp->h < ihdr->height)
{
unsigned filter = *pngp->inflate_buf++;
unsigned filter = *pngp->inflate_buf++;
pngp->restore_buf_size += 1;
ret = png_reverse_filter_copy_line(*data,
ret = png_reverse_filter_copy_line(*data,
ihdr, pngp, filter);
if (ret == IMAGE_PROCESS_END || ret == IMAGE_PROCESS_ERROR_END)
goto end;
}
if (ret == IMAGE_PROCESS_END || ret == IMAGE_PROCESS_ERROR_END)
else
goto end;
pngp->h++;
@ -670,11 +671,9 @@ static int png_reverse_filter_adam7_iterate(uint32_t **data_,
if (!to_next)
return IMAGE_PROCESS_END;
ret = png_reverse_filter_init(ihdr, pngp);
if (ret == 1)
if ((ret = png_reverse_filter_init(ihdr, pngp)) == 1)
return IMAGE_PROCESS_NEXT;
if (ret == -1)
else if (ret == -1)
return IMAGE_PROCESS_ERROR_END;
if (png_reverse_filter_init(&pngp->ihdr, pngp) == -1)