diff options
author | bsalomon@google.com <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-03-29 19:22:36 +0000 |
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committer | bsalomon@google.com <bsalomon@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2013-03-29 19:22:36 +0000 |
commit | 26e18b593ab65e4d92dfbce92579d8bc180d4c2c (patch) | |
tree | ddc5eddf771019decfe6a3401ea9b2da79dbc68a /src/gpu/SkGpuDevice.cpp | |
parent | e36f3baa78cbf4a7bab6e5f14702d6a4d259abde (diff) |
Add support for reading the dst pixel value in an effect. Use in a new effect for the kDarken xfer mode.
The current implementation is to always make a copy of the entire dst before the draw.
It will only succeed if the RT is also a texture.
Obviously, there is lots of room for improvement.
Review URL: https://codereview.chromium.org/13314002
git-svn-id: http://skia.googlecode.com/svn/trunk@8449 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'src/gpu/SkGpuDevice.cpp')
-rw-r--r-- | src/gpu/SkGpuDevice.cpp | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp index 49d6562cea..45176cf8c9 100644 --- a/src/gpu/SkGpuDevice.cpp +++ b/src/gpu/SkGpuDevice.cpp @@ -493,17 +493,27 @@ inline bool skPaint2GrPaintNoShader(SkGpuDevice* dev, grPaint->setDither(skPaint.isDither()); grPaint->setAntiAlias(skPaint.isAntiAlias()); - SkXfermode::Coeff sm = SkXfermode::kOne_Coeff; - SkXfermode::Coeff dm = SkXfermode::kISA_Coeff; + SkXfermode::Coeff sm; + SkXfermode::Coeff dm; SkXfermode* mode = skPaint.getXfermode(); GrEffectRef* xferEffect = NULL; - if (SkXfermode::AsNewEffect(mode, dev->context(), &xferEffect, &sm, &dm)) { - SkSafeUnref(grPaint->colorStage(kXfermodeEffectIdx)->setEffect(xferEffect)); + if (SkXfermode::AsNewEffectOrCoeff(mode, dev->context(), &xferEffect, &sm, &dm)) { + if (NULL != xferEffect) { + grPaint->colorStage(kXfermodeEffectIdx)->setEffect(xferEffect)->unref(); + // This may not be the right place to have this logic but we set the GPU blend to + // src-over so that fractional coverage will be accounted for correctly. + sm = SkXfermode::kOne_Coeff; + dm = SkXfermode::kISA_Coeff; + } } else { //SkDEBUGCODE(SkDebugf("Unsupported xfer mode.\n");) #if 0 return false; +#else + // Fall back to src-over + sm = SkXfermode::kOne_Coeff; + dm = SkXfermode::kISA_Coeff; #endif } grPaint->setBlendFunc(sk_blend_to_grblend(sm), sk_blend_to_grblend(dm)); |