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/*
* Copyright (C) 2010, 2011, 2012, 2013 Research In Motion Limited. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "SurfacePool.h"
#include <BlackBerryPlatformExecutableMessage.h>
#include <BlackBerryPlatformGraphics.h>
#include <BlackBerryPlatformLog.h>
#include <BlackBerryPlatformMessageClient.h>
#include <BlackBerryPlatformMisc.h>
#include <BlackBerryPlatformScreen.h>
#include <BlackBerryPlatformSettings.h>
#include <BlackBerryPlatformThreading.h>
#include <errno.h>
#if BLACKBERRY_PLATFORM_GRAPHICS_EGL
#include <EGL/eglext.h>
#endif
namespace BlackBerry {
namespace WebKit {
#if BLACKBERRY_PLATFORM_GRAPHICS_EGL
static PFNEGLCREATESYNCKHRPROC eglCreateSyncKHR;
static PFNEGLDESTROYSYNCKHRPROC eglDestroySyncKHR;
static PFNEGLCLIENTWAITSYNCKHRPROC eglClientWaitSyncKHR;
#endif
SurfacePool* SurfacePool::globalSurfacePool()
{
static SurfacePool* s_instance = 0;
if (!s_instance)
s_instance = new SurfacePool;
return s_instance;
}
SurfacePool::SurfacePool()
: m_numberOfFrontBuffers(0)
, m_initialized(false)
, m_buffersSuspended(false)
, m_hasFenceExtension(false)
{
}
int SurfacePool::numberOfBackingStoreFrontBuffers() const
{
return m_numberOfFrontBuffers;
}
void SurfacePool::initialize(const Platform::IntSize& tileSize)
{
if (m_initialized)
return;
m_initialized = true;
m_numberOfFrontBuffers = Platform::Settings::instance()->numberOfBackingStoreFrontBuffers();
if (!m_numberOfFrontBuffers)
return; // We completely disable tile rendering when 0 tiles are specified.
const unsigned numberOfBackBuffers = Platform::Settings::instance()->numberOfBackingStoreBackBuffers();
const unsigned numberOfPoolTiles = m_numberOfFrontBuffers + numberOfBackBuffers; // back buffer
for (size_t i = 0; i < numberOfPoolTiles; ++i)
m_tileBufferPool.append(new TileBuffer(tileSize));
// All buffers not used as front buffers are used as back buffers.
// Initially, that's all of them.
m_availableBackBufferPool = m_tileBufferPool;
#if BLACKBERRY_PLATFORM_GRAPHICS_EGL
const char* extensions = eglQueryString(Platform::Graphics::eglDisplay(), EGL_EXTENSIONS);
if (strstr(extensions, "EGL_KHR_fence_sync")) {
// We assume GL_OES_EGL_sync is present, but we don't check for it because
// no GL context is current at this point.
// TODO: check for it
eglCreateSyncKHR = (PFNEGLCREATESYNCKHRPROC) eglGetProcAddress("eglCreateSyncKHR");
eglDestroySyncKHR = (PFNEGLDESTROYSYNCKHRPROC) eglGetProcAddress("eglDestroySyncKHR");
eglClientWaitSyncKHR = (PFNEGLCLIENTWAITSYNCKHRPROC) eglGetProcAddress("eglClientWaitSyncKHR");
m_hasFenceExtension = eglCreateSyncKHR && eglDestroySyncKHR && eglClientWaitSyncKHR;
}
#endif
// m_mutex must be recursive because destroyPlatformSync may be called indirectly
// from notifyBuffersComposited
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
pthread_mutex_init(&m_mutex, &attr);
pthread_mutexattr_destroy(&attr);
}
PlatformGraphicsContext* SurfacePool::createPlatformGraphicsContext(Platform::Graphics::Drawable* drawable) const
{
return drawable;
}
void SurfacePool::destroyPlatformGraphicsContext(PlatformGraphicsContext*) const
{
}
unsigned SurfacePool::numberOfAvailableBackBuffers() const
{
return m_availableBackBufferPool.size();
}
TileBuffer* SurfacePool::takeBackBuffer()
{
ASSERT(!m_availableBackBufferPool.isEmpty());
if (m_availableBackBufferPool.isEmpty())
return 0;
TileBuffer* buffer = m_availableBackBufferPool.first();
// Reorder so we get FIFO semantics. Should minimize fence waiting times.
for (unsigned i = 0; i < m_availableBackBufferPool.size() - 1; ++i)
m_availableBackBufferPool[i] = m_availableBackBufferPool[i + 1];
m_availableBackBufferPool.removeLast();
ASSERT(buffer);
return buffer;
}
void SurfacePool::addBackBuffer(TileBuffer* tileBuffer)
{
ASSERT(tileBuffer);
tileBuffer->clearRenderedRegion();
m_availableBackBufferPool.append(tileBuffer);
}
void SurfacePool::createBuffers()
{
if (!m_initialized || m_tileBufferPool.isEmpty() || !m_buffersSuspended)
return;
// Create the tile pool.
for (size_t i = 0; i < m_tileBufferPool.size(); ++i) {
if (m_tileBufferPool[i]->wasNativeBufferCreated())
Platform::Graphics::createPixmapBuffer(m_tileBufferPool[i]->nativeBuffer());
}
m_buffersSuspended = false;
}
void SurfacePool::releaseBuffers()
{
if (!m_initialized || m_tileBufferPool.isEmpty() || m_buffersSuspended)
return;
m_buffersSuspended = true;
// Release the tile pool.
for (size_t i = 0; i < m_tileBufferPool.size(); ++i) {
if (!m_tileBufferPool[i]->wasNativeBufferCreated())
continue;
m_tileBufferPool[i]->clearRenderedRegion();
// Clear the buffer to prevent accidental leakage of (possibly sensitive) pixel data.
Platform::Graphics::clearBuffer(m_tileBufferPool[i]->nativeBuffer(), 0, 0, 0, 0);
Platform::Graphics::destroyPixmapBuffer(m_tileBufferPool[i]->nativeBuffer());
}
Platform::userInterfaceThreadMessageClient()->dispatchSyncMessage(
Platform::createFunctionCallMessage(&Platform::Graphics::collectThreadSpecificGarbage));
}
void SurfacePool::waitForBuffer(TileBuffer*)
{
if (!m_hasFenceExtension)
return;
}
void SurfacePool::notifyBuffersComposited(const TileBufferList&)
{
if (!m_hasFenceExtension)
return;
}
void SurfacePool::destroyPlatformSync(void*)
{
}
}
}
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