diff options
Diffstat (limited to 'include/codec/SkCodec.h')
| -rw-r--r-- | include/codec/SkCodec.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/include/codec/SkCodec.h b/include/codec/SkCodec.h index 1b9cb0f5d7..8b6e210167 100644 --- a/include/codec/SkCodec.h +++ b/include/codec/SkCodec.h @@ -168,11 +168,20 @@ public: ZeroInitialized fZeroInitialized; /** * If not NULL, represents a subset of the original image to decode. - * * Must be within the bounds returned by getInfo(). - * * If the EncodedFormat is kWEBP_SkEncodedFormat (the only one which * currently supports subsets), the top and left values must be even. + * + * In getPixels, we will attempt to decode the exact rectangular + * subset specified by fSubset. + * + * In a scanline decode, it does not make sense to specify a subset + * top or subset height, since the client already controls which rows + * to get and which rows to skip. During scanline decodes, we will + * require that the subset top be zero and the subset height be equal + * to the full height. We will, however, use the values of + * subset left and subset width to decode partial scanlines on calls + * to getScanlines(). */ SkIRect* fSubset; }; @@ -259,7 +268,7 @@ public: * @return Enum representing success or reason for failure. */ Result startScanlineDecode(const SkImageInfo& dstInfo, const SkCodec::Options* options, - SkPMColor ctable[], int* ctableCount); + SkPMColor ctable[], int* ctableCount); /** * Simplified version of startScanlineDecode() that asserts that info is NOT |