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cwebp: add PNG metadata extraction

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the values of XMP/EXIF/ICC are currently unused.

Change-Id: I39d78b9a179f2d36c9c8ea12776bfdf6d8d18663
This commit is contained in:
James Zern
2012-12-04 19:00:30 -08:00
parent 6bf208748c
commit dba64d91bb
3 changed files with 184 additions and 9 deletions
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4
examples/pngdec.h
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@@ -16,13 +16,15 @@
extern "C" {
#endif
struct Metadata;
struct WebPPicture;
// Reads a PNG from 'in_file', returning the decoded output in 'pic'.
// If 'keep_alpha' is true and the PNG has an alpha channel, the output is RGBA
// otherwise it will be RGB.
// Returns true on success.
int ReadPNG(FILE* in_file, struct WebPPicture* const pic, int keep_alpha);
int ReadPNG(FILE* in_file, struct WebPPicture* const pic, int keep_alpha,
struct Metadata* const metadata);
#if defined(__cplusplus) || defined(c_plusplus)
} // extern "C"