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/*
* Copyright 2010, 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 "SharedTexture.h"
#include "GLUtils.h"
#define LOG_NDEBUG 1
#define LOG_TAG "SharedTexture.cpp"
#include <utils/Log.h>
namespace WebCore {
TextureInfo::TextureInfo() {
m_textureId = GL_NO_TEXTURE;
m_width = 0;
m_height = 0;
m_internalFormat = 0;
}
bool TextureInfo::equalsAttributes(const TextureInfo* otherTexture) {
return otherTexture->m_width == m_width &&
otherTexture->m_height == m_height &&
otherTexture->m_internalFormat == m_internalFormat;
}
void TextureInfo::copyAttributes(const TextureInfo* sourceTexture) {
m_width = sourceTexture->m_width;
m_height = sourceTexture->m_height;
m_internalFormat = sourceTexture->m_internalFormat;
}
bool TextureInfo::operator==(const TextureInfo& otherTexture) {
return otherTexture.m_textureId == m_textureId && equalsAttributes(&otherTexture);
}
SharedTexture::SharedTexture() {
m_display = eglGetCurrentDisplay();
m_eglImage = EGL_NO_IMAGE_KHR;
m_isNewImage = true;
m_syncObject = EGL_NO_SYNC_KHR;
m_supportsEGLImage = GLUtils::isEGLImageSupported();
m_supportsEGLFenceSyncKHR = GLUtils::isEGLFenceSyncSupported();
//TODO temporarily disable fence sync until nvidia implementation is complete
m_supportsEGLFenceSyncKHR = false;
LOGI("imageEGL: %d syncKHR: %d", m_supportsEGLImage, m_supportsEGLFenceSyncKHR);
}
// called by the consumer when it no longer wants to consume and after it has
// terminated all providers. It is up to the providers to terminate their
// textures in the case that EGLImages are used
SharedTexture::~SharedTexture() {
if (m_supportsEGLImage) {
eglDestroyImageKHR(m_display, m_eglImage);
glDeleteTextures(1, &m_targetTexture.m_textureId);
} else {
glDeleteTextures(1, &m_sourceTexture.m_textureId);
}
}
void SharedTexture::initSourceTexture() {
glGenTextures(1, &m_sourceTexture.m_textureId);
}
TextureInfo* SharedTexture::lockSource() {
m_lock.lock();
if (m_supportsEGLFenceSyncKHR && m_syncObject != EGL_NO_SYNC_KHR) {
EGLint status = eglClientWaitSyncKHR(m_display, m_syncObject, 0, 1000000);
if (status == EGL_TIMEOUT_EXPIRED_KHR) {
LOGE("Sync timeout for shared texture (%d)", m_sourceTexture.m_textureId);
}
eglDestroySyncKHR(m_display, m_syncObject);
m_syncObject = EGL_NO_SYNC_KHR;
}
return &m_sourceTexture;
}
void SharedTexture::releaseSource() {
if (m_supportsEGLImage) {
// delete the existing image if needed
if (!m_sourceTexture.equalsAttributes(&m_targetTexture)) {
if (m_eglImage != EGL_NO_IMAGE_KHR) {
eglDestroyImageKHR(m_display, m_eglImage);
m_eglImage = EGL_NO_IMAGE_KHR;
m_isNewImage = true;
}
m_targetTexture.copyAttributes(&m_sourceTexture);
}
// create an image from the texture
if (m_eglImage == EGL_NO_IMAGE_KHR) {
GLUtils::createEGLImageFromTexture(m_sourceTexture.m_textureId, &m_eglImage);
LOGV("Generating Image (%d) 0x%x", m_sourceTexture.m_textureId, m_eglImage);
}
glFinish(); // ensures the texture is ready to be used by the consumer
} else {
m_targetTexture = m_sourceTexture;
// in the case of shared contexts we must flush the texture edits to the
// GPU. This ensures the edits complete prior to allowing the texture to
// be bound on the producers context.
glFlush();
}
m_lock.unlock();
}
TextureInfo* SharedTexture::lockTarget() {
m_lock.lock();
if ((!m_supportsEGLImage && m_targetTexture.m_textureId == GL_NO_TEXTURE) ||
(m_supportsEGLImage && m_eglImage == EGL_NO_IMAGE_KHR)) {
m_lock.unlock();
return 0;
}
if (m_supportsEGLImage && (m_isNewImage || m_targetTexture.m_textureId == GL_NO_TEXTURE)) {
if (m_targetTexture.m_textureId == GL_NO_TEXTURE) {
glGenTextures(1, &m_targetTexture.m_textureId);
}
GLUtils::createTextureFromEGLImage(m_targetTexture.m_textureId, m_eglImage);
LOGV("Generating Consumer Texture from 0x%x", m_eglImage);
m_isNewImage = false;
}
return &m_targetTexture;
}
void SharedTexture::releaseTarget() {
if (m_supportsEGLFenceSyncKHR) {
if (m_syncObject != EGL_NO_SYNC_KHR) {
eglDestroySyncKHR(m_display, m_syncObject);
}
m_syncObject = eglCreateSyncKHR(m_display, EGL_SYNC_FENCE_KHR, NULL);
} else {
// TODO the flush currently prevents the screen from getting partial
// updates but the only way to guarantee this is to call glFinish. Until
// we support an EGL sync we will leave flush enable in order to test
// with modest performance.
glFlush();
}
m_lock.unlock();
}
} // namespace WebCore
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