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| author | Samuel Rødal <sroedal@trolltech.com> | 2010-03-10 14:13:25 (GMT) |
|---|---|---|
| committer | Samuel Rødal <sroedal@trolltech.com> | 2010-03-10 14:46:25 (GMT) |
| commit | 7dc470fd96f50eff923208cdc6e273161062e2a7 (patch) | |
| tree | 0f26342dcd5545175342a9d338a137b2e0a6f2b9 /src/opengl | |
| parent | fdf85116102ed03a56dae3947f4251bf0f889f33 (diff) | |
| download | Qt-7dc470fd96f50eff923208cdc6e273161062e2a7.zip Qt-7dc470fd96f50eff923208cdc6e273161062e2a7.tar.gz Qt-7dc470fd96f50eff923208cdc6e273161062e2a7.tar.bz2 | |
Worked around driver bug causing clipping errors on N900.
Apparently the driver does some optimization which causes it to behave
erratically when stencil testing is enabled. Multiplying the return
value from the texture lookup by 1.0 disables the optimization.
Task-number: QTBUG-8753
Reviewed-by: Trond
Diffstat (limited to 'src/opengl')
| -rw-r--r-- | src/opengl/gl2paintengineex/qglengineshadersource_p.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/src/opengl/gl2paintengineex/qglengineshadersource_p.h b/src/opengl/gl2paintengineex/qglengineshadersource_p.h index ee04166..c88c041 100644 --- a/src/opengl/gl2paintengineex/qglengineshadersource_p.h +++ b/src/opengl/gl2paintengineex/qglengineshadersource_p.h @@ -331,9 +331,14 @@ static const char* const qglslImageSrcFragmentShader = "\n\ varying highp vec2 textureCoords; \n\ uniform lowp sampler2D imageTexture; \n\ lowp vec4 srcPixel() \n\ - { \n\ - return texture2D(imageTexture, textureCoords); \n\ - }\n"; + { \n" +#ifdef QT_OPENGL_ES_2 + // work-around for driver bug + "return 1.0 * texture2D(imageTexture, textureCoords); \n" +#else + "return texture2D(imageTexture, textureCoords); \n" +#endif + "}\n"; static const char* const qglslCustomSrcFragmentShader = "\n\ varying highp vec2 textureCoords; \n\ |