From 16b41824dceb1cecfe54089d88af787af134af8a Mon Sep 17 00:00:00 2001 From: Tom Cooksey Date: Wed, 30 Dec 2009 09:48:35 +0100 Subject: Remove superfluous enable/disable vertex arrtib arrays Now that the shader manager takes care of enabling/disabling the vertex attribute arrays for us, the GL2 paint engine doesn't have to do it. This reduces GL state changes within the paint engine and provides significant performance improvements. For a given test case (25,000 3x3px solid rects), the improvement is 67% on desktop (nVidia) and 9% on embedded (SGX). Reviewed-By: Kim --- .../gl2paintengineex/qpaintengineex_opengl2.cpp | 34 ---------------------- 1 file changed, 34 deletions(-) diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp index 0574c52..90b7214 100644 --- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp +++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp @@ -242,9 +242,6 @@ void QGLTextureGlyphCache::resizeTextureData(int width, int height) float vertexCoordinateArray[] = { -1, -1, 1, -1, 1, 1, -1, 1 }; float textureCoordinateArray[] = { 0, 0, 1, 0, 1, 1, 0, 1 }; - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); - glEnableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); - glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, vertexCoordinateArray); glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, textureCoordinateArray); @@ -253,9 +250,6 @@ void QGLTextureGlyphCache::resizeTextureData(int width, int height) glDrawArrays(GL_TRIANGLE_FAN, 0, 4); - glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); - glDisableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); - glBindTexture(GL_TEXTURE_2D, m_texture); #ifdef QT_OPENGL_ES_2 @@ -806,34 +800,20 @@ void QGL2PaintEngineExPrivate::transferMode(EngineMode newMode) return; if (mode == TextDrawingMode || mode == ImageDrawingMode || mode == ImageArrayDrawingMode) { - glDisableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); - glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); - glDisableVertexAttribArray(QT_OPACITY_ATTR); - lastTextureUsed = GLuint(-1); } if (newMode == TextDrawingMode) { - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); - glEnableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); - glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, vertexCoordinateArray.data()); glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, textureCoordinateArray.data()); } if (newMode == ImageDrawingMode) { - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); - glEnableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); - glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, staticVertexCoordinateArray); glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, staticTextureCoordinateArray); } if (newMode == ImageArrayDrawingMode) { - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); - glEnableVertexAttribArray(QT_TEXTURE_COORDS_ATTR); - glEnableVertexAttribArray(QT_OPACITY_ATTR); - glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, vertexCoordinateArray.data()); glVertexAttribPointer(QT_TEXTURE_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, textureCoordinateArray.data()); glVertexAttribPointer(QT_OPACITY_ATTR, 1, GL_FLOAT, GL_FALSE, 0, opacityArray.data()); @@ -944,7 +924,6 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path) } prepareForDraw(currentBrush.isOpaque()); - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); #ifdef QT_OPENGL_CACHE_AS_VBOS glBindBuffer(GL_ARRAY_BUFFER, cache->vbo); glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, false, 0, 0); @@ -1085,10 +1064,8 @@ void QGL2PaintEngineExPrivate::fillStencilWithVertexArray(const float *data, glStencilMask(GL_STENCIL_HIGH_BIT); #if 0 glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT); // Simply invert the stencil bit - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, data); glDrawArrays(GL_TRIANGLE_STRIP, 0, count); - glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); #else glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE); @@ -1098,10 +1075,8 @@ void QGL2PaintEngineExPrivate::fillStencilWithVertexArray(const float *data, } else { glStencilFunc(GL_ALWAYS, GL_STENCIL_HIGH_BIT, 0xff); } - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, data); glDrawArrays(GL_TRIANGLE_STRIP, 0, count); - glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); #endif } @@ -1228,12 +1203,8 @@ void QGL2PaintEngineExPrivate::composite(const QGLRect& boundingRect) boundingRect.right, boundingRect.top }; - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, rectVerts); - glDrawArrays(GL_TRIANGLE_FAN, 0, 4); - - glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); } // Draws the vertex array as a set of triangle fans. @@ -1241,7 +1212,6 @@ void QGL2PaintEngineExPrivate::drawVertexArrays(const float *data, int *stops, i GLenum primitive) { // Now setup the pointer to the vertex array: - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, GL_FALSE, 0, data); int previousStop = 0; @@ -1255,7 +1225,6 @@ void QGL2PaintEngineExPrivate::drawVertexArrays(const float *data, int *stops, i glDrawArrays(primitive, previousStop, stop - previousStop); previousStop = stop; } - glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); } void QGL2PaintEngineExPrivate::prepareDepthRangeForRenderText() @@ -1364,7 +1333,6 @@ void QGL2PaintEngineExPrivate::stroke(const QVectorPath &path, const QPen &pen) if (opaque) { prepareForDraw(opaque); - glEnableVertexAttribArray(QT_VERTEX_COORDS_ATTR); glVertexAttribPointer(QT_VERTEX_COORDS_ATTR, 2, GL_FLOAT, false, 0, stroker.vertices()); glDrawArrays(GL_TRIANGLE_STRIP, 0, stroker.vertexCount() / 2); @@ -1373,8 +1341,6 @@ void QGL2PaintEngineExPrivate::stroke(const QVectorPath &path, const QPen &pen) // d->prepareForDraw(true); // glDrawArrays(GL_LINE_STRIP, 0, d->stroker.vertexCount() / 2); - glDisableVertexAttribArray(QT_VERTEX_COORDS_ATTR); - } else { qreal width = qpen_widthf(pen) / 2; if (width == 0) -- cgit v0.12