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add WebPPictureImportRGBX() and WebPPictureImportBGRX()

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When importing BGRA or RGBA data for encoding, provide variants of
the WEBPImportPicture API for RGBX and BRGX data meaning the alpha
channel should be ignored.

Author: noel@chromium.org
from Chromium patch: https://chromiumcodereview.appspot.com/10496016/

Change-Id: I15fcaa4160c69a2b5549394204b6e6d7a1c5d333
This commit is contained in:
Noel Chromium
2012-06-05 00:26:17 -07:00
committed by Pascal Massimino
parent 437999fb77
commit 27519bc2b6
2 changed files with 19 additions and 2 deletions
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10
src/enc/picture.c
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@ -604,6 +604,16 @@ int WebPPictureImportBGRA(WebPPicture* const picture,
return Import(picture, rgba, rgba_stride, 4, 1, 1);
}
int WebPPictureImportRGBX(WebPPicture* const picture,
const uint8_t* const rgba, int rgba_stride) {
return Import(picture, rgba, rgba_stride, 4, 0, 0);
}
int WebPPictureImportBGRX(WebPPicture* const picture,
const uint8_t* const rgba, int rgba_stride) {
return Import(picture, rgba, rgba_stride, 4, 1, 0);
}
//------------------------------------------------------------------------------
// Helper: clean up fully transparent area to help compressibility.