1/* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 16 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 17 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 18 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 19 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 21 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27 28#if USE(ACCELERATED_COMPOSITING) 29 30#include "cc/CCCanvasLayerImpl.h" 31 32#include "CanvasLayerChromium.h" 33#include "GraphicsContext3D.h" 34#include "LayerRendererChromium.h" 35#include <wtf/text/WTFString.h> 36 37namespace WebCore { 38 39CCCanvasLayerImpl::CCCanvasLayerImpl(LayerChromium* owner) 40 : CCLayerImpl(owner) 41 , m_textureId(0) 42 , m_premultipliedAlpha(true) 43{ 44} 45 46CCCanvasLayerImpl::~CCCanvasLayerImpl() 47{ 48} 49 50void CCCanvasLayerImpl::draw(const IntRect&) 51{ 52 ASSERT(layerRenderer()); 53 const CCCanvasLayerImpl::Program* program = layerRenderer()->canvasLayerProgram(); 54 ASSERT(program && program->initialized()); 55 GraphicsContext3D* context = layerRenderer()->context(); 56 GLC(context, context->activeTexture(GraphicsContext3D::TEXTURE0)); 57 GLC(context, context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_textureId)); 58 GC3Denum sfactor = m_premultipliedAlpha ? GraphicsContext3D::ONE : GraphicsContext3D::SRC_ALPHA; 59 GLC(context, context->blendFunc(sfactor, GraphicsContext3D::ONE_MINUS_SRC_ALPHA)); 60 layerRenderer()->useShader(program->program()); 61 GLC(context, context->uniform1i(program->fragmentShader().samplerLocation(), 0)); 62 LayerChromium::drawTexturedQuad(context, layerRenderer()->projectionMatrix(), drawTransform(), 63 bounds().width(), bounds().height(), drawOpacity(), 64 program->vertexShader().matrixLocation(), 65 program->fragmentShader().alphaLocation()); 66 67} 68 69 70void CCCanvasLayerImpl::dumpLayerProperties(TextStream& ts, int indent) const 71{ 72 writeIndent(ts, indent); 73 ts << "canvas layer texture id: " << m_textureId << " premultiplied: " << m_premultipliedAlpha << "\n"; 74 CCLayerImpl::dumpLayerProperties(ts, indent); 75} 76 77} 78 79#endif // USE(ACCELERATED_COMPOSITING) 80