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/*
* Copyright 2011, The Android Open Source Project
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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 THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER 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"
#include "GaneshContext.h"
#include "GLUtils.h"
#if USE(ACCELERATED_COMPOSITING)
#ifdef DEBUG
#include <cutils/log.h>
#include <wtf/CurrentTime.h>
#undef XLOG
#define XLOG(...) android_printLog(ANDROID_LOG_DEBUG, "GaneshContext", __VA_ARGS__)
#else
#undef XLOG
#define XLOG(...)
#endif // DEBUG
namespace WebCore {
GaneshContext::GaneshContext()
: m_grContext(0)
, m_baseTileDevice(0)
, m_baseTileFbo(0)
, m_baseTileStencil(0)
{
}
GaneshContext* GaneshContext::gInstance = 0;
GaneshContext* GaneshContext::instance()
{
if (!gInstance)
gInstance = new GaneshContext();
return gInstance;
}
GrContext* GaneshContext::getGrContext()
{
if (!m_grContext) {
m_grContext = GrContext::Create(kOpenGL_Shaders_GrEngine, NULL);
}
return m_grContext;
}
SkDevice* GaneshContext::getDeviceForBaseTile(GLuint textureId)
{
if (!m_baseTileFbo) {
glGenFramebuffers(1, &m_baseTileFbo);
XLOG("generated FBO");
}
if (!m_baseTileStencil) {
glGenRenderbuffers(1, &m_baseTileStencil);
glBindRenderbuffer(GL_RENDERBUFFER, m_baseTileStencil);
glRenderbufferStorage(GL_RENDERBUFFER, GL_STENCIL_INDEX8,
TilesManager::tileWidth(),
TilesManager::tileHeight());
glClearStencil(0);
glClear(GL_STENCIL_BUFFER_BIT);
XLOG("generated stencil");
}
glBindFramebuffer(GL_FRAMEBUFFER, m_baseTileFbo);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureId, 0);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, m_baseTileStencil);
if (!m_baseTileDevice) {
GrPlatformSurfaceDesc surfaceDesc;
surfaceDesc.fSurfaceType = kRenderTarget_GrPlatformSurfaceType;
surfaceDesc.fRenderTargetFlags = kNone_GrPlatformRenderTargetFlagBit;
surfaceDesc.fWidth = TilesManager::tileWidth();
surfaceDesc.fHeight = TilesManager::tileWidth();
surfaceDesc.fConfig = kRGBA_8888_GrPixelConfig;
surfaceDesc.fStencilBits = 8;
surfaceDesc.fPlatformRenderTarget = m_baseTileFbo;
GrContext* grContext = getGrContext();
GrRenderTarget* renderTarget = (GrRenderTarget*) grContext->createPlatformSurface(surfaceDesc);
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config,
TilesManager::tileWidth(), TilesManager::tileWidth());
m_baseTileDevice = new SkGpuDevice(grContext, bitmap, renderTarget);
renderTarget->unref();
XLOG("generated device %p", m_baseTileDevice);
}
GLUtils::checkGlError("getDeviceForBaseTile");
return m_baseTileDevice;
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
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