| /* |
| * Copyright (C) 2010 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(ACCELERATED_2D_CANVAS) || USE(3D_GRAPHICS) |
| |
| #include "DrawingBuffer.h" |
| |
| #include "Extensions3D.h" |
| #include "WebGLLayer.h" |
| |
| #import "BlockExceptions.h" |
| |
| namespace WebCore { |
| |
| DrawingBuffer::DrawingBuffer(GraphicsContext3D* context, |
| const IntSize& size, |
| bool multisampleExtensionSupported, |
| bool packedDepthStencilExtensionSupported, |
| PreserveDrawingBuffer preserveDrawingBuffer, |
| AlphaRequirement alpha) |
| : m_preserveDrawingBuffer(preserveDrawingBuffer) |
| , m_alpha(alpha) |
| , m_scissorEnabled(false) |
| , m_texture2DBinding(0) |
| , m_framebufferBinding(0) |
| , m_activeTextureUnit(GraphicsContext3D::TEXTURE0) |
| , m_context(context) |
| , m_size(-1, -1) |
| , m_multisampleExtensionSupported(multisampleExtensionSupported) |
| , m_packedDepthStencilExtensionSupported(packedDepthStencilExtensionSupported) |
| , m_fbo(context->createFramebuffer()) |
| , m_colorBuffer(0) |
| , m_frontColorBuffer(0) |
| , m_separateFrontTexture(false) |
| , m_depthStencilBuffer(0) |
| , m_depthBuffer(0) |
| , m_stencilBuffer(0) |
| , m_multisampleFBO(0) |
| , m_multisampleColorBuffer(0) |
| { |
| ASSERT(m_fbo); |
| if (!m_fbo) { |
| clear(); |
| return; |
| } |
| |
| // Create the WebGLLayer |
| BEGIN_BLOCK_OBJC_EXCEPTIONS |
| m_platformLayer.adoptNS([[WebGLLayer alloc] initWithGraphicsContext3D:m_context.get()]); |
| #ifndef NDEBUG |
| [m_platformLayer.get() setName:@"DrawingBuffer Layer"]; |
| #endif |
| END_BLOCK_OBJC_EXCEPTIONS |
| |
| // create a texture to render into |
| m_colorBuffer = context->createTexture(); |
| context->bindTexture(GraphicsContext3D::TEXTURE_2D, m_colorBuffer); |
| context->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR); |
| context->texParameterf(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR); |
| context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE); |
| context->texParameteri(GraphicsContext3D::TEXTURE_2D, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE); |
| context->bindTexture(GraphicsContext3D::TEXTURE_2D, 0); |
| |
| createSecondaryBuffers(); |
| reset(size); |
| } |
| |
| DrawingBuffer::~DrawingBuffer() |
| { |
| clear(); |
| } |
| |
| #if USE(ACCELERATED_COMPOSITING) |
| PlatformLayer* DrawingBuffer::platformLayer() |
| { |
| return m_platformLayer.get(); |
| } |
| |
| void DrawingBuffer::prepareBackBuffer() |
| { |
| } |
| |
| bool DrawingBuffer::requiresCopyFromBackToFrontBuffer() const |
| { |
| return false; |
| } |
| |
| unsigned DrawingBuffer::frontColorBuffer() const |
| { |
| return colorBuffer(); |
| } |
| #endif |
| |
| } |
| |
| #endif |