diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/opengl/gl2paintengineex/qglengineshadersource_p.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/opengl/gl2paintengineex/qglengineshadersource_p.h b/src/opengl/gl2paintengineex/qglengineshadersource_p.h index acd4461..6bcf010 100644 --- a/src/opengl/gl2paintengineex/qglengineshadersource_p.h +++ b/src/opengl/gl2paintengineex/qglengineshadersource_p.h @@ -260,12 +260,24 @@ static const char* const qglslPositionWithTextureBrushVertexShader = "\ static const char* const qglslAffinePositionWithTextureBrushVertexShader = qglslPositionWithTextureBrushVertexShader; +#if defined(QT_OPENGL_ES_2) +// OpenGL ES does not support GL_REPEAT wrap modes for NPOT textures. So instead, +// we emulate GL_REPEAT by only taking the fractional part of the texture coords. +// TODO: Special case POT textures which don't need this emulation +static const char* const qglslTextureBrushSrcFragmentShader = "\ + varying highp vec2 brushTextureCoords; \ + uniform lowp sampler2D brushTexture; \ + lowp vec4 srcPixel() { \ + return texture2D(brushTexture, fract(brushTextureCoords)); \ + }"; +#else static const char* const qglslTextureBrushSrcFragmentShader = "\ varying highp vec2 brushTextureCoords; \ uniform lowp sampler2D brushTexture; \ lowp vec4 srcPixel() { \ return texture2D(brushTexture, brushTextureCoords); \ }"; +#endif static const char* const qglslTextureBrushSrcWithPatternFragmentShader = "\ varying highp vec2 brushTextureCoords; \ |