LayerRendererChromium::~LayerRendererChromium()
{
ASSERT(CCProxy::isImplThread());
Extensions3DChromium* extensions3DChromium = static_cast<Extensions3DChromium*>(m_context->getExtensions());
extensions3DChromium->setSwapBuffersCompleteCallbackCHROMIUM(nullptr);
m_headsUpDisplay.clear(); // Explicitly destroy the HUD before the TextureManager dies.
cleanupSharedObjects();
}
bool LayerRendererChromium::initializeSharedObjects()
{
makeContextCurrent();
// Get the max texture size supported by the system.
m_maxTextureSize = 0;
GLC(m_context.get(), m_context->getIntegerv(GraphicsContext3D::MAX_TEXTURE_SIZE, &m_maxTextureSize));
// Create an FBO for doing offscreen rendering.
GLC(m_context.get(), m_offscreenFramebufferId = m_context->createFramebuffer());
m_sharedGeometry = adoptPtr(new GeometryBinding(m_context.get()));
m_borderProgram = adoptPtr(new LayerChromium::BorderProgram(m_context.get()));
m_headsUpDisplayProgram = adoptPtr(new CCHeadsUpDisplay::Program(m_context.get()));
m_canvasLayerProgram = adoptPtr(new CCCanvasLayerImpl::Program(m_context.get()));
m_videoLayerRGBAProgram = adoptPtr(new CCVideoLayerImpl::RGBAProgram(m_context.get()));
m_videoLayerYUVProgram = adoptPtr(new CCVideoLayerImpl::YUVProgram(m_context.get()));
m_pluginLayerProgram = adoptPtr(new CCPluginLayerImpl::Program(m_context.get()));
m_renderSurfaceProgram = adoptPtr(new RenderSurfaceChromium::Program(m_context.get()));
m_renderSurfaceMaskProgram = adoptPtr(new RenderSurfaceChromium::MaskProgram(m_context.get()));
m_tilerProgram = adoptPtr(new LayerTilerChromium::Program(m_context.get()));
if (!m_sharedGeometry->initialized() || !m_borderProgram->initialized()
|| !m_canvasLayerProgram->initialized()
|| !m_headsUpDisplayProgram->initialized()
|| !m_videoLayerRGBAProgram->initialized() || !m_videoLayerYUVProgram->initialized()
|| !m_pluginLayerProgram->initialized() || !m_renderSurfaceProgram->initialized()
|| !m_renderSurfaceMaskProgram->initialized() || !m_tilerProgram->initialized()) {
LOG_ERROR("Compositor failed to initialize shaders. Falling back to software.");
cleanupSharedObjects();
return false;
}
m_textureManager = TextureManager::create(m_context.get(), textureMemoryLimitBytes, m_maxTextureSize);
return true;
}
LayerRendererChromium::~LayerRendererChromium()
{
cleanupSharedObjects();
}
bool LayerRendererChromium::initializeSharedObjects()
{
makeContextCurrent();
// Vertex and fragment shaders for rendering the scrolled root layer quad.
// They differ from a regular content layer shader in that they don't swizzle
// the colors or take an alpha value.
char scrollVertexShaderString[] =
"attribute vec4 a_position; \n"
"attribute vec2 a_texCoord; \n"
"uniform mat4 matrix; \n"
"varying vec2 v_texCoord; \n"
"void main() \n"
"{ \n"
" gl_Position = matrix * a_position; \n"
" v_texCoord = a_texCoord; \n"
"} \n";
char scrollFragmentShaderString[] =
"precision mediump float; \n"
"varying vec2 v_texCoord; \n"
"uniform sampler2D s_texture; \n"
"void main() \n"
"{ \n"
" vec4 texColor = texture2D(s_texture, v_texCoord); \n"
" gl_FragColor = vec4(texColor.x, texColor.y, texColor.z, texColor.w); \n"
"} \n";
m_scrollShaderProgram = LayerChromium::createShaderProgram(scrollVertexShaderString, scrollFragmentShaderString);
if (!m_scrollShaderProgram) {
LOG_ERROR("LayerRendererChromium: Failed to create scroll shader program");
cleanupSharedObjects();
return false;
}
GLC(m_scrollShaderSamplerLocation = glGetUniformLocation(m_scrollShaderProgram, "s_texture"));
GLC(m_scrollShaderMatrixLocation = glGetUniformLocation(m_scrollShaderProgram, "matrix"));
if (m_scrollShaderSamplerLocation == -1 || m_scrollShaderMatrixLocation == -1) {
LOG_ERROR("Failed to initialize scroll shader.");
cleanupSharedObjects();
return false;
}
// Create a texture object to hold the contents of the root layer.
m_rootLayerTextureId = createLayerTexture();
if (!m_rootLayerTextureId) {
LOG_ERROR("Failed to create texture for root layer");
cleanupSharedObjects();
return false;
}
// Turn off filtering for the root layer to avoid blurring from the repeated
// writes and reads to the framebuffer that happen while scrolling.
GLC(glBindTexture(GL_TEXTURE_2D, m_rootLayerTextureId));
GLC(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST));
GLC(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST));
// Get the max texture size supported by the system.
GLC(glGetIntegerv(GL_MAX_TEXTURE_SIZE, &m_maxTextureSize));
// Get the number of bits available in the stencil buffer.
GLC(glGetIntegerv(GL_STENCIL_BITS, &m_numStencilBits));
m_layerSharedValues = adoptPtr(new LayerChromium::SharedValues());
m_contentLayerSharedValues = adoptPtr(new ContentLayerChromium::SharedValues());
m_canvasLayerSharedValues = adoptPtr(new CanvasLayerChromium::SharedValues());
if (!m_layerSharedValues->initialized() || !m_contentLayerSharedValues->initialized() || !m_canvasLayerSharedValues->initialized()) {
cleanupSharedObjects();
return false;
}
return true;
}
LayerRendererChromium::~LayerRendererChromium()
{
m_headsUpDisplay.clear(); // Explicitly destroy the HUD before the TextureManager dies.
cleanupSharedObjects();
}
