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VP8ApplyNearLossless: skip alloc for small images

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Change-Id: I193513c1fbbc5fab571014d3cfd3319d671d8949
This commit is contained in:
Andrzej Hunt
2025-11-07 16:10:28 +00:00
parent 2760d87827
commit 41c2a8d2f5
1 changed files with 7 additions and 6 deletions
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13
src/enc/near_lossless_enc.c
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@@ -111,18 +111,15 @@ static void NearLossless(int xsize, int ysize, const uint32_t* argb_src,
int VP8ApplyNearLossless(const WebPPicture* const picture, int quality,
uint32_t* const argb_dst) {
int i;
uint32_t* copy_buffer;
const int xsize = picture->width;
const int ysize = picture->height;
const int stride = picture->argb_stride;
uint32_t* const copy_buffer =
(uint32_t*)WebPSafeMalloc(xsize * 3, sizeof(*copy_buffer));
const int limit_bits = VP8LNearLosslessBits(quality);
assert(argb_dst != NULL);
assert(limit_bits > 0);
assert(limit_bits <= MAX_LIMIT_BITS);
if (copy_buffer == NULL) {
return 0;
}
// For small icon images, don't attempt to apply near-lossless compression.
if ((xsize < MIN_DIM_FOR_NEAR_LOSSLESS &&
ysize < MIN_DIM_FOR_NEAR_LOSSLESS) ||
@@ -131,10 +128,14 @@ int VP8ApplyNearLossless(const WebPPicture* const picture, int quality,
memcpy(argb_dst + i * xsize, picture->argb + i * picture->argb_stride,
xsize * sizeof(*argb_dst));
}
WebPSafeFree(copy_buffer);
return 1;
}
copy_buffer = (uint32_t*)WebPSafeMalloc(xsize * 3, sizeof(*copy_buffer));
if (copy_buffer == NULL) {
return 0;
}
NearLossless(xsize, ysize, picture->argb, stride, limit_bits, copy_buffer,
argb_dst);
for (i = limit_bits - 1; i != 0; --i) {