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| author | ztenghui <ztenghui@google.com> | 2015-02-17 13:26:10 -0800 |
|---|---|---|
| committer | ztenghui <ztenghui@google.com> | 2015-04-09 09:57:27 -0700 |
| commit | ecf091e171012831cddea59f1f64a46e87ee8c4f (patch) | |
| tree | 80faa269881a6cc562b999dc4d7fedbbf2d0b4a9 /libs/hwui/ProgramCache.cpp | |
| parent | b929d65800fcc91c04d385fe9ec23a924868883b (diff) | |
| download | frameworks_base-ecf091e171012831cddea59f1f64a46e87ee8c4f.zip frameworks_base-ecf091e171012831cddea59f1f64a46e87ee8c4f.tar.gz frameworks_base-ecf091e171012831cddea59f1f64a46e87ee8c4f.tar.bz2 | |
Update the shadow fall off function from cosine to gaussian.
Also tune the parameters to match a better look designed by UX team.
For ambient part, the acos transformed alpha is not needed any more.
b/19370798
Change-Id: I20d2615d1be502eb900942ed756aecd1660dee48
Diffstat (limited to 'libs/hwui/ProgramCache.cpp')
| -rw-r--r-- | libs/hwui/ProgramCache.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libs/hwui/ProgramCache.cpp b/libs/hwui/ProgramCache.cpp index e9b22e2..41adda1 100644 --- a/libs/hwui/ProgramCache.cpp +++ b/libs/hwui/ProgramCache.cpp @@ -240,8 +240,9 @@ const char* gFS_Main_ModulateColor = const char* gFS_Main_ApplyVertexAlphaLinearInterp = " fragColor *= alpha;\n"; const char* gFS_Main_ApplyVertexAlphaShadowInterp = - " fragColor *= (1.0 - cos(alpha)) / 2.0;\n"; - + // Use a gaussian function for the shadow fall off. Note that alpha here + // is actually (1.0 - alpha) for saving computation. + " fragColor *= exp(- alpha * alpha * 4.0) - 0.018;\n"; const char* gFS_Main_FetchTexture[2] = { // Don't modulate " fragColor = texture2D(baseSampler, outTexCoords);\n", |