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make alpha unfilter work in-place

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* remove a malloc
* remove the unused 'bpp' argument from filter/unfilter functions

Change-Id: I28d78baaaddc20f1d5a3bb2bd0b4e96a12a920d8
This commit is contained in:
skal
2013-03-14 20:26:39 +01:00
parent 14ef5005a2
commit 0aef3ebdea
4 changed files with 44 additions and 55 deletions
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4
src/enc/alpha.c
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@ -127,8 +127,8 @@ static int EncodeAlphaInternal(const uint8_t* const data, int width, int height,
VP8BitWriterAppend(bw, &header, ALPHA_HEADER_LEN);
filter_func = WebPFilters[filter];
if (filter_func) {
filter_func(data, width, height, 1, width, tmp_alpha);
if (filter_func != NULL) {
filter_func(data, width, height, width, tmp_alpha);
alpha_src = tmp_alpha;
} else {
alpha_src = data;