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add WebPCheckCropDimensions()

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and avoid integer overflow in test of x/width and y/height parameters
against the image width/height

Bug: chromium:1196778, chromium:1196777, chromium:1196480
Change-Id: I7b8f1f4dbebfe073b1ba260b8317979488655dcc
This commit is contained in:
James Zern
2021-04-20 14:02:52 -07:00
parent 8fdaecb09d
commit 595fa13f83
3 changed files with 13 additions and 3 deletions
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4
src/dec/webpi_dec.h
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@ -77,6 +77,10 @@ VP8StatusCode WebPParseHeaders(WebPHeaderStructure* const headers);
//------------------------------------------------------------------------------
// Misc utils
// Returns true if crop dimensions are within image bounds.
int WebPCheckCropDimensions(int image_width, int image_height,
int x, int y, int w, int h);
// Initializes VP8Io with custom setup, io and teardown functions. The default
// hooks will use the supplied 'params' as io->opaque handle.
void WebPInitCustomIo(WebPDecParams* const params, VP8Io* const io);