1 /* 2 * Copyright (C) 2010 Apple 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 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 28 #if ENABLE(ACCELERATED_2D_CANVAS) || ENABLE(WEBGL) 29 30 #include "DrawingBuffer.h" 31 32 #include "Extensions3D.h" 33 #include "WebGLLayer.h" 34 35 #import "BlockExceptions.h" 36 37 namespace WebCore { 38 39 DrawingBuffer::DrawingBuffer(GraphicsContext3D* context, 40 const IntSize& size, 41 bool multisampleExtensionSupported, 42 bool packedDepthStencilExtensionSupported) 43 : m_context(context) 44 , m_size(-1, -1) 45 , m_multisampleExtensionSupported(multisampleExtensionSupported) 46 , m_packedDepthStencilExtensionSupported(packedDepthStencilExtensionSupported) 47 , m_fbo(context->createFramebuffer()) 48 , m_colorBuffer(0) 49 , m_depthStencilBuffer(0) 50 , m_depthBuffer(0) 51 , m_stencilBuffer(0) 52 , m_multisampleFBO(0) 53 , m_multisampleColorBuffer(0) 54 { 55 ASSERT(m_fbo); 56 if (!m_fbo) { 57 clear(); 58 return; 59 } 60 61 // Create the WebGLLayer 62 BEGIN_BLOCK_OBJC_EXCEPTIONS 63 m_platformLayer.adoptNS([[WebGLLayer alloc] initWithGraphicsContext3D:m_context.get()]); 64 #ifndef NDEBUG 65 [m_platformLayer.get() setName:@"DrawingBuffer Layer"]; 66 #endif 67 END_BLOCK_OBJC_EXCEPTIONS 68 69 // create a texture to render into 70 m_colorBuffer = context->createTexture(); 71 context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_colorBuffer); 72 context->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR); 73 context->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR); 74 context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE); 75 context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE); 76 context->bindTexture(GraphicsContext3D::TEXTURE_2D, 0); 77 78 // Create the FBO 79 m_fbo = context->createFramebuffer(); 80 ASSERT(m_fbo); 81 if (!m_fbo) { 82 clear(); 83 return; 84 } 85 86 createSecondaryBuffers(); 87 reset(size); 88 } 89 90 DrawingBuffer::~DrawingBuffer() 91 { 92 clear(); 93 } 94 95 void DrawingBuffer::didReset() 96 { 97 } 98 99 PlatformLayer* DrawingBuffer::platformLayer() 100 { 101 return m_platformLayer.get(); 102 } 103 104 Platform3DObject DrawingBuffer::platformColorBuffer() const 105 { 106 return m_colorBuffer; 107 } 108 109 } 110 111 #endif 112