libwebp/SOURCES/mozilla-1819244.patch

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2023-05-02 07:32:35 +00:00
# HG changeset patch
# User Timothy Nikkel <tnikkel@gmail.com>
# Date 1678835815 0
# Node ID 53b805c752ff23080e100eda2b3b4280d4370b2e
# Parent 8fcdaf8d685d5903b127e041feb1716637b6008f
Bug 1819244. Cherry pic webp commit fix. r=aosmond, a=dsmith
https://github.com/webmproject/libwebp/commit/a486d800b60d0af4cc0836bf7ed8f21e12974129
Differential Revision: https://phabricator.services.mozilla.com/D171814
diff --git a/media/libwebp/src/enc/alpha_enc.c b/media/libwebp/src/enc/alpha_enc.c
--- a/src/enc/alpha_enc.c
+++ b/src/enc/alpha_enc.c
@@ -8,16 +8,17 @@
// -----------------------------------------------------------------------------
//
// Alpha-plane compression.
//
// Author: Skal (pascal.massimino@gmail.com)
#include <assert.h>
#include <stdlib.h>
+#include <string.h>
#include "src/enc/vp8i_enc.h"
#include "src/dsp/dsp.h"
#include "src/utils/filters_utils.h"
#include "src/utils/quant_levels_utils.h"
#include "src/utils/utils.h"
#include "src/webp/format_constants.h"
@@ -143,31 +144,32 @@ static int EncodeAlphaInternal(const uin
output_size = VP8LBitWriterNumBytes(&tmp_bw);
if (output_size > data_size) {
// compressed size is larger than source! Revert to uncompressed mode.
method = ALPHA_NO_COMPRESSION;
VP8LBitWriterWipeOut(&tmp_bw);
}
} else {
VP8LBitWriterWipeOut(&tmp_bw);
+ memset(&result->bw, 0, sizeof(result->bw));
return 0;
}
}
if (method == ALPHA_NO_COMPRESSION) {
output = alpha_src;
output_size = data_size;
ok = 1;
}
// Emit final result.
header = method | (filter << 2);
if (reduce_levels) header |= ALPHA_PREPROCESSED_LEVELS << 4;
- VP8BitWriterInit(&result->bw, ALPHA_HEADER_LEN + output_size);
+ if (!VP8BitWriterInit(&result->bw, ALPHA_HEADER_LEN + output_size)) ok = 0;
ok = ok && VP8BitWriterAppend(&result->bw, &header, ALPHA_HEADER_LEN);
ok = ok && VP8BitWriterAppend(&result->bw, output, output_size);
if (method != ALPHA_NO_COMPRESSION) {
VP8LBitWriterWipeOut(&tmp_bw);
}
ok = ok && !result->bw.error_;
result->score = VP8BitWriterSize(&result->bw);