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author | Tom Cooksey <thomas.cooksey@nokia.com> | 2010-01-20 09:18:32 (GMT) |
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committer | Tom Cooksey <thomas.cooksey@nokia.com> | 2010-01-21 12:28:58 (GMT) |
commit | 3a8236a01f89882d91e22a336f1e7134d3a84b68 (patch) | |
tree | 0fffca58e99c76092ccedfaf36157d0a48b9f4c4 /src/opengl/gl2paintengineex | |
parent | 1729c2baea4e39f97d71b77f4c25af131f23221c (diff) | |
download | Qt-3a8236a01f89882d91e22a336f1e7134d3a84b68.zip Qt-3a8236a01f89882d91e22a336f1e7134d3a84b68.tar.gz Qt-3a8236a01f89882d91e22a336f1e7134d3a84b68.tar.bz2 |
Use an attribute value for the PMV matrix rather than a uniform
This has several advantages: First, updating an attribute value
seems to be cheaper than updating a uniform. Second, vertex atribute
values are independent of shader program, which means they persist
across changing of the shader program. This makes code simpler and
reduces GL state changes. Note: Credit goes to Samuel for finding
this little gem. :-)
For the 25920 solid QGraphicsRectItem test case, this gives 10%
improvement on desktop and 27% on the SGX.
Reviewed-By: Kim
Diffstat (limited to 'src/opengl/gl2paintengineex')
5 files changed, 42 insertions, 31 deletions
diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager.cpp b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp index 556b888..9fd9e18 100644 --- a/src/opengl/gl2paintengineex/qglengineshadermanager.cpp +++ b/src/opengl/gl2paintengineex/qglengineshadermanager.cpp @@ -324,6 +324,11 @@ QGLEngineShaderProg *QGLEngineSharedShaders::findProgramInCache(const QGLEngineS newProg->program->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR); if (newProg->useOpacityAttribute) newProg->program->bindAttributeLocation("opacityArray", QT_OPACITY_ATTR); + if (newProg->usePmvMatrix) { + newProg->program->bindAttributeLocation("pmvMatrix1", QT_PMV_MATRIX_1_ATTR); + newProg->program->bindAttributeLocation("pmvMatrix2", QT_PMV_MATRIX_2_ATTR); + newProg->program->bindAttributeLocation("pmvMatrix3", QT_PMV_MATRIX_3_ATTR); + } newProg->program->link(); if (!newProg->program->isLinked()) { @@ -424,7 +429,6 @@ GLuint QGLEngineShaderManager::getUniformLocation(Uniform id) "patternColor", "globalOpacity", "depth", - "pmvMatrix", "maskTexture", "fragmentColor", "linearData", @@ -743,6 +747,7 @@ bool QGLEngineShaderManager::useCorrectShaderProg() } requiredProgram.useTextureCoords = texCoords; requiredProgram.useOpacityAttribute = (opacityMode == AttributeOpacity); + requiredProgram.usePmvMatrix = true; // At this point, requiredProgram is fully populated so try to find the program in the cache currentShaderProg = sharedShaders->findProgramInCache(requiredProgram); diff --git a/src/opengl/gl2paintengineex/qglengineshadermanager_p.h b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h index c52e5c0..3ab4ebe 100644 --- a/src/opengl/gl2paintengineex/qglengineshadermanager_p.h +++ b/src/opengl/gl2paintengineex/qglengineshadermanager_p.h @@ -253,6 +253,9 @@ struct QGLEngineCachedShaderProg static const GLuint QT_VERTEX_COORDS_ATTR = 0; static const GLuint QT_TEXTURE_COORDS_ATTR = 1; static const GLuint QT_OPACITY_ATTR = 2; +static const GLuint QT_PMV_MATRIX_1_ATTR = 3; +static const GLuint QT_PMV_MATRIX_2_ATTR = 4; +static const GLuint QT_PMV_MATRIX_3_ATTR = 5; class QGLEngineShaderProg; @@ -397,6 +400,7 @@ public: bool useTextureCoords; bool useOpacityAttribute; + bool usePmvMatrix; bool operator==(const QGLEngineShaderProg& other) { // We don't care about the program @@ -431,7 +435,6 @@ public: PatternColor, GlobalOpacity, Depth, - PmvMatrix, MaskTexture, FragmentColor, LinearData, diff --git a/src/opengl/gl2paintengineex/qglengineshadersource_p.h b/src/opengl/gl2paintengineex/qglengineshadersource_p.h index 6e98b02..b471b81 100644 --- a/src/opengl/gl2paintengineex/qglengineshadersource_p.h +++ b/src/opengl/gl2paintengineex/qglengineshadersource_p.h @@ -97,9 +97,12 @@ static const char* const qglslMainWithTexCoordsAndOpacityVertexShader = "\ // shader are also perspective corrected. static const char* const qglslPositionOnlyVertexShader = "\ attribute highp vec2 vertexCoordsArray;\ - uniform highp mat3 pmvMatrix;\ + attribute highp vec3 pmvMatrix1; \ + attribute highp vec3 pmvMatrix2; \ + attribute highp vec3 pmvMatrix3; \ void setPosition(void)\ {\ + highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ gl_Position = vec4(transformedPos.xy, 0.0, transformedPos.z); \ }"; @@ -114,12 +117,15 @@ static const char* const qglslUntransformedPositionVertexShader = "\ // Pattern Brush - This assumes the texture size is 8x8 and thus, the inverted size is 0.125 static const char* const qglslPositionWithPatternBrushVertexShader = "\ attribute highp vec2 vertexCoordsArray; \ - uniform highp mat3 pmvMatrix; \ + attribute highp vec3 pmvMatrix1; \ + attribute highp vec3 pmvMatrix2; \ + attribute highp vec3 pmvMatrix3; \ uniform mediump vec2 halfViewportSize; \ uniform highp vec2 invertedTextureSize; \ uniform highp mat3 brushTransform; \ varying highp vec2 patternTexCoords; \ void setPosition(void) { \ + highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ @@ -144,12 +150,15 @@ static const char* const qglslPatternBrushSrcFragmentShader = "\ // Linear Gradient Brush static const char* const qglslPositionWithLinearGradientBrushVertexShader = "\ attribute highp vec2 vertexCoordsArray; \ - uniform highp mat3 pmvMatrix; \ + attribute highp vec3 pmvMatrix1; \ + attribute highp vec3 pmvMatrix2; \ + attribute highp vec3 pmvMatrix3; \ uniform mediump vec2 halfViewportSize; \ uniform highp vec3 linearData; \ uniform highp mat3 brushTransform; \ varying mediump float index; \ void setPosition() { \ + highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ @@ -174,12 +183,15 @@ static const char* const qglslLinearGradientBrushSrcFragmentShader = "\ // Conical Gradient Brush static const char* const qglslPositionWithConicalGradientBrushVertexShader = "\ attribute highp vec2 vertexCoordsArray;\ - uniform highp mat3 pmvMatrix;\ + attribute highp vec3 pmvMatrix1; \ + attribute highp vec3 pmvMatrix2; \ + attribute highp vec3 pmvMatrix3; \ uniform mediump vec2 halfViewportSize; \ uniform highp mat3 brushTransform; \ varying highp vec2 A; \ - void setPosition(void)\ - {\ + void setPosition(void) \ + { \ + highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ @@ -210,7 +222,9 @@ static const char* const qglslConicalGradientBrushSrcFragmentShader = "\n\ // Radial Gradient Brush static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\ attribute highp vec2 vertexCoordsArray;\ - uniform highp mat3 pmvMatrix;\ + attribute highp vec3 pmvMatrix1; \ + attribute highp vec3 pmvMatrix2; \ + attribute highp vec3 pmvMatrix3; \ uniform mediump vec2 halfViewportSize; \ uniform highp mat3 brushTransform; \ uniform highp vec2 fmp; \ @@ -218,6 +232,7 @@ static const char* const qglslPositionWithRadialGradientBrushVertexShader = "\ varying highp vec2 A; \ void setPosition(void) \ {\ + highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ @@ -247,12 +262,15 @@ static const char* const qglslRadialGradientBrushSrcFragmentShader = "\ // Texture Brush static const char* const qglslPositionWithTextureBrushVertexShader = "\ attribute highp vec2 vertexCoordsArray; \ - uniform highp mat3 pmvMatrix; \ + attribute highp vec3 pmvMatrix1; \ + attribute highp vec3 pmvMatrix2; \ + attribute highp vec3 pmvMatrix3; \ uniform mediump vec2 halfViewportSize; \ uniform highp vec2 invertedTextureSize; \ uniform highp mat3 brushTransform; \ varying highp vec2 textureCoords; \ void setPosition(void) { \ + highp mat3 pmvMatrix = mat3(pmvMatrix1, pmvMatrix2, pmvMatrix3); \ vec3 transformedPos = pmvMatrix * vec3(vertexCoordsArray.xy, 1.0); \ gl_Position.xy = transformedPos.xy / transformedPos.z; \ mediump vec2 viewportCoords = (gl_Position.xy + 1.0) * halfViewportSize; \ diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp index caa679b..b282676 100644 --- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp +++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp @@ -168,12 +168,6 @@ void QGL2PaintEngineExPrivate::useSimpleShader() if (matrixDirty) updateMatrix(); - - if (simpleShaderMatrixUniformDirty) { - const GLuint location = shaderManager->simpleProgram()->uniformLocation("pmvMatrix"); - glUniformMatrix3fv(location, 1, GL_FALSE, (GLfloat*)pmvMatrix); - simpleShaderMatrixUniformDirty = false; - } } void QGL2PaintEngineExPrivate::updateBrushTexture() @@ -392,9 +386,11 @@ void QGL2PaintEngineExPrivate::updateMatrix() matrixDirty = false; - // The actual data has been updated so both shader program's uniforms need updating - simpleShaderMatrixUniformDirty = true; - shaderMatrixUniformDirty = true; + // Set the PMV matrix attribute. As we use an attributes rather than uniforms, we only + // need to do this once for every matrix change and persists across all shader programs. + glVertexAttrib3fv(QT_PMV_MATRIX_1_ATTR, pmvMatrix[0]); + glVertexAttrib3fv(QT_PMV_MATRIX_2_ATTR, pmvMatrix[1]); + glVertexAttrib3fv(QT_PMV_MATRIX_3_ATTR, pmvMatrix[2]); dasher.setInvScale(inverseScale); stroker.setInvScale(inverseScale); @@ -932,18 +928,12 @@ bool QGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque) if (changed) { // The shader program has changed so mark all uniforms as dirty: brushUniformsDirty = true; - shaderMatrixUniformDirty = true; opacityUniformDirty = true; } if (brushUniformsDirty && mode != ImageDrawingMode && mode != ImageArrayDrawingMode) updateBrushUniforms(); - if (shaderMatrixUniformDirty) { - glUniformMatrix3fv(location(QGLEngineShaderManager::PmvMatrix), 1, GL_FALSE, (GLfloat*)pmvMatrix); - shaderMatrixUniformDirty = false; - } - if (opacityMode == QGLEngineShaderManager::UniformOpacity && opacityUniformDirty) { shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::GlobalOpacity), (GLfloat)q->state()->opacity); opacityUniformDirty = false; @@ -1955,11 +1945,8 @@ void QGL2PaintEngineEx::setState(QPainterState *new_state) if (old_state == s || old_state->renderHintsChanged) renderHintsChanged(); - if (old_state == s || old_state->matrixChanged) { + if (old_state == s || old_state->matrixChanged) d->matrixDirty = true; - d->simpleShaderMatrixUniformDirty = true; - d->shaderMatrixUniformDirty = true; - } if (old_state == s || old_state->compositionModeChanged) d->compositionModeDirty = true; diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h index ce1b538..8fa0eff 100644 --- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h +++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h @@ -252,8 +252,6 @@ public: bool compositionModeDirty; bool brushTextureDirty; bool brushUniformsDirty; - bool simpleShaderMatrixUniformDirty; - bool shaderMatrixUniformDirty; bool opacityUniformDirty; bool stencilClean; // Has the stencil not been used for clipping so far? |