void CanvasLayerWebKitThread::updateTextureContentsIfNeeded()
{
if (!m_needsDisplay || !m_device)
return;
m_needsDisplay = false;
m_device->makeRenderTargetCurrent();
GLint previousTexture;
glGetIntegerv(GL_TEXTURE_BINDING_2D, &previousTexture);
if (!m_texID) {
glGenTextures(1, &m_texID);
glBindTexture(GL_TEXTURE_2D, m_texID);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, m_device->width(), m_device->height(), 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
createFrontBufferLock();
}
pthread_mutex_lock(m_frontBufferLock);
glBindTexture(GL_TEXTURE_2D, m_texID);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 0, 0, m_device->width(), m_device->height(), 0);
glBindTexture(GL_TEXTURE_2D, previousTexture);
pthread_mutex_unlock(m_frontBufferLock);
}
void WebGLLayerWebKitThread::updateTextureContentsIfNeeded()
{
// FIXME: Does WebGLLayer always need display? Or can we just return immediately if (!m_needsDisplay)?
m_needsDisplay = false;
if (!m_frontBufferLock)
createFrontBufferLock();
// Lock copied GL texture so that the UI thread won't access it while we are drawing into it.
pthread_mutex_lock(m_frontBufferLock);
m_webGLContext->prepareTexture();
pthread_mutex_unlock(m_frontBufferLock);
}
