From 7dc470fd96f50eff923208cdc6e273161062e2a7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Samuel=20R=C3=B8dal?= Date: Wed, 10 Mar 2010 15:13:25 +0100 Subject: 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 --- src/opengl/gl2paintengineex/qglengineshadersource_p.h | 11 ++++++++--- 1 file 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\ -- cgit v0.12