| /* |
| * Copyright (C) 2009 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 COMPUTER, 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(3D_CANVAS) |
| |
| #include "WebGLFramebuffer.h" |
| |
| #include "WebGLRenderingContext.h" |
| |
| namespace WebCore { |
| |
| namespace { |
| |
| // This function is only for depth/stencil/depth_stencil attachment. |
| // Currently we assume these attachments are all renderbuffers. |
| unsigned long getInternalFormat(WebGLObject* buffer) |
| { |
| ASSERT(buffer && buffer->isRenderbuffer()); |
| return (reinterpret_cast<WebGLRenderbuffer*>(buffer))->getInternalFormat(); |
| } |
| |
| bool isUninitialized(WebGLObject* attachedObject) |
| { |
| if (attachedObject && attachedObject->object() && attachedObject->isRenderbuffer() |
| && !(reinterpret_cast<WebGLRenderbuffer*>(attachedObject))->isInitialized()) |
| return true; |
| return false; |
| } |
| |
| void setInitialized(WebGLObject* attachedObject) |
| { |
| if (attachedObject && attachedObject->object() && attachedObject->isRenderbuffer()) |
| (reinterpret_cast<WebGLRenderbuffer*>(attachedObject))->setInitialized(); |
| } |
| |
| bool isValid(WebGLObject* attachedObject) |
| { |
| if (attachedObject && attachedObject->object() && attachedObject->isRenderbuffer()) { |
| if (!(reinterpret_cast<WebGLRenderbuffer*>(attachedObject))->isValid()) |
| return false; |
| } |
| return true; |
| } |
| |
| } // anonymous namespace |
| |
| PassRefPtr<WebGLFramebuffer> WebGLFramebuffer::create(WebGLRenderingContext* ctx) |
| { |
| return adoptRef(new WebGLFramebuffer(ctx)); |
| } |
| |
| WebGLFramebuffer::WebGLFramebuffer(WebGLRenderingContext* ctx) |
| : WebGLObject(ctx) |
| , m_hasEverBeenBound(false) |
| { |
| setObject(context()->graphicsContext3D()->createFramebuffer()); |
| } |
| |
| void WebGLFramebuffer::setAttachment(unsigned long attachment, WebGLObject* attachedObject) |
| { |
| if (!object()) |
| return; |
| if (attachedObject && !attachedObject->object()) |
| attachedObject = 0; |
| switch (attachment) { |
| case GraphicsContext3D::COLOR_ATTACHMENT0: |
| m_colorAttachment = attachedObject; |
| break; |
| case GraphicsContext3D::DEPTH_ATTACHMENT: |
| m_depthAttachment = attachedObject; |
| break; |
| case GraphicsContext3D::STENCIL_ATTACHMENT: |
| m_stencilAttachment = attachedObject; |
| break; |
| case GraphicsContext3D::DEPTH_STENCIL_ATTACHMENT: |
| m_depthStencilAttachment = attachedObject; |
| break; |
| default: |
| return; |
| } |
| } |
| |
| WebGLObject* WebGLFramebuffer::getAttachment(unsigned long attachment) const |
| { |
| if (!object()) |
| return 0; |
| switch (attachment) { |
| case GraphicsContext3D::COLOR_ATTACHMENT0: |
| return m_colorAttachment.get(); |
| case GraphicsContext3D::DEPTH_ATTACHMENT: |
| return m_depthAttachment.get(); |
| case GraphicsContext3D::STENCIL_ATTACHMENT: |
| return m_stencilAttachment.get(); |
| case GraphicsContext3D::DEPTH_STENCIL_ATTACHMENT: |
| return m_depthStencilAttachment.get(); |
| default: |
| return 0; |
| } |
| } |
| |
| void WebGLFramebuffer::removeAttachment(WebGLObject* attachment) |
| { |
| if (!object()) |
| return; |
| if (attachment == m_colorAttachment.get()) |
| m_colorAttachment = 0; |
| else if (attachment == m_depthAttachment.get()) |
| m_depthAttachment = 0; |
| else if (attachment == m_stencilAttachment.get()) |
| m_stencilAttachment = 0; |
| else if (attachment == m_depthStencilAttachment.get()) |
| m_depthStencilAttachment = 0; |
| else |
| return; |
| } |
| |
| unsigned long WebGLFramebuffer::getColorBufferFormat() const |
| { |
| if (object() && m_colorAttachment && m_colorAttachment->object()) { |
| if (m_colorAttachment->isRenderbuffer()) { |
| unsigned long format = (reinterpret_cast<WebGLRenderbuffer*>(m_colorAttachment.get()))->getInternalFormat(); |
| switch (format) { |
| case GraphicsContext3D::RGBA4: |
| case GraphicsContext3D::RGB5_A1: |
| return GraphicsContext3D::RGBA; |
| case GraphicsContext3D::RGB565: |
| return GraphicsContext3D::RGB; |
| } |
| } else if (m_colorAttachment->isTexture()) |
| return (reinterpret_cast<WebGLTexture*>(m_colorAttachment.get()))->getInternalFormat(0); |
| } |
| return 0; |
| } |
| |
| bool WebGLFramebuffer::isIncomplete(bool checkInternalFormat) const |
| { |
| unsigned int count = 0; |
| if (isDepthAttached()) { |
| if (checkInternalFormat && getInternalFormat(m_depthAttachment.get()) != GraphicsContext3D::DEPTH_COMPONENT16) |
| return true; |
| count++; |
| } |
| if (isStencilAttached()) { |
| if (checkInternalFormat && getInternalFormat(m_stencilAttachment.get()) != GraphicsContext3D::STENCIL_INDEX8) |
| return true; |
| count++; |
| } |
| if (isDepthStencilAttached()) { |
| if (checkInternalFormat && getInternalFormat(m_depthStencilAttachment.get()) != GraphicsContext3D::DEPTH_STENCIL) |
| return true; |
| if (!isValid(m_depthStencilAttachment.get())) |
| return true; |
| count++; |
| } |
| if (count > 1) |
| return true; |
| return false; |
| } |
| |
| bool WebGLFramebuffer::onAccess() |
| { |
| if (isIncomplete(true)) |
| return false; |
| return initializeRenderbuffers(); |
| } |
| |
| void WebGLFramebuffer::deleteObjectImpl(Platform3DObject object) |
| { |
| if (!isDeleted()) |
| context()->graphicsContext3D()->deleteFramebuffer(object); |
| m_colorAttachment = 0; |
| m_depthAttachment = 0; |
| m_stencilAttachment = 0; |
| m_depthStencilAttachment = 0; |
| } |
| |
| bool WebGLFramebuffer::initializeRenderbuffers() |
| { |
| ASSERT(object()); |
| if (!isColorAttached()) |
| return false; |
| bool initColor = false, initDepth = false, initStencil = false; |
| unsigned long mask = 0; |
| if (isUninitialized(m_colorAttachment.get())) { |
| initColor = true; |
| mask |= GraphicsContext3D::COLOR_BUFFER_BIT; |
| } |
| if (isUninitialized(m_depthAttachment.get())) { |
| initDepth = true; |
| mask |= GraphicsContext3D::DEPTH_BUFFER_BIT; |
| } |
| if (isUninitialized(m_stencilAttachment.get())) { |
| initStencil = true; |
| mask |= GraphicsContext3D::STENCIL_BUFFER_BIT; |
| } |
| if (isUninitialized(m_depthStencilAttachment.get())) { |
| initDepth = true; |
| initStencil = true; |
| mask |= (GraphicsContext3D::DEPTH_BUFFER_BIT | GraphicsContext3D::STENCIL_BUFFER_BIT); |
| } |
| if (!initColor && !initDepth && !initStencil) |
| return true; |
| |
| // We only clear un-initialized renderbuffers when they are ready to be |
| // read, i.e., when the framebuffer is complete. |
| GraphicsContext3D* g3d = context()->graphicsContext3D(); |
| if (g3d->checkFramebufferStatus(GraphicsContext3D::FRAMEBUFFER) != GraphicsContext3D::FRAMEBUFFER_COMPLETE) |
| return false; |
| |
| float colorClearValue[] = {0, 0, 0, 0}, depthClearValue = 0; |
| int stencilClearValue = 0; |
| unsigned char colorMask[] = {1, 1, 1, 1}, depthMask = 1; |
| unsigned int stencilMask = 0xffffffff; |
| bool isScissorEnabled = false; |
| bool isDitherEnabled = false; |
| if (initColor) { |
| g3d->getFloatv(GraphicsContext3D::COLOR_CLEAR_VALUE, colorClearValue); |
| g3d->getBooleanv(GraphicsContext3D::COLOR_WRITEMASK, colorMask); |
| g3d->clearColor(0, 0, 0, 0); |
| g3d->colorMask(true, true, true, true); |
| } |
| if (initDepth) { |
| g3d->getFloatv(GraphicsContext3D::DEPTH_CLEAR_VALUE, &depthClearValue); |
| g3d->getBooleanv(GraphicsContext3D::DEPTH_WRITEMASK, &depthMask); |
| g3d->clearDepth(0); |
| g3d->depthMask(true); |
| } |
| if (initStencil) { |
| g3d->getIntegerv(GraphicsContext3D::STENCIL_CLEAR_VALUE, &stencilClearValue); |
| g3d->getIntegerv(GraphicsContext3D::STENCIL_WRITEMASK, reinterpret_cast<int*>(&stencilMask)); |
| g3d->clearStencil(0); |
| g3d->stencilMask(0xffffffff); |
| } |
| isScissorEnabled = g3d->isEnabled(GraphicsContext3D::SCISSOR_TEST); |
| g3d->disable(GraphicsContext3D::SCISSOR_TEST); |
| isDitherEnabled = g3d->isEnabled(GraphicsContext3D::DITHER); |
| g3d->disable(GraphicsContext3D::DITHER); |
| |
| g3d->clear(mask); |
| |
| if (initColor) { |
| g3d->clearColor(colorClearValue[0], colorClearValue[1], colorClearValue[2], colorClearValue[3]); |
| g3d->colorMask(colorMask[0], colorMask[1], colorMask[2], colorMask[3]); |
| } |
| if (initDepth) { |
| g3d->clearDepth(depthClearValue); |
| g3d->depthMask(depthMask); |
| } |
| if (initStencil) { |
| g3d->clearStencil(stencilClearValue); |
| g3d->stencilMask(stencilMask); |
| } |
| if (isScissorEnabled) |
| g3d->enable(GraphicsContext3D::SCISSOR_TEST); |
| else |
| g3d->disable(GraphicsContext3D::SCISSOR_TEST); |
| if (isDitherEnabled) |
| g3d->enable(GraphicsContext3D::DITHER); |
| else |
| g3d->disable(GraphicsContext3D::DITHER); |
| |
| if (initColor) |
| setInitialized(m_colorAttachment.get()); |
| if (initDepth && initStencil && m_depthStencilAttachment) |
| setInitialized(m_depthStencilAttachment.get()); |
| else { |
| if (initDepth) |
| setInitialized(m_depthAttachment.get()); |
| if (initStencil) |
| setInitialized(m_stencilAttachment.get()); |
| } |
| return true; |
| } |
| |
| } |
| |
| #endif // ENABLE(3D_CANVAS) |
