bool LayerRendererChromium::initialize()
{
m_context->makeContextCurrent();
if (settings().acceleratePainting)
m_capabilities.usingAcceleratedPainting = true;
WebCore::Extensions3D* extensions = m_context->getExtensions();
m_capabilities.usingMapSub = extensions->supports("GL_CHROMIUM_map_sub");
if (m_capabilities.usingMapSub)
extensions->ensureEnabled("GL_CHROMIUM_map_sub");
// Use the swapBuffers callback only with the threaded proxy.
if (settings().enableCompositorThread)
m_capabilities.usingSwapCompleteCallback = extensions->supports("GL_CHROMIUM_swapbuffers_complete_callback");
if (m_capabilities.usingSwapCompleteCallback) {
extensions->ensureEnabled("GL_CHROMIUM_swapbuffers_complete_callback");
Extensions3DChromium* extensions3DChromium = static_cast<Extensions3DChromium*>(extensions);
extensions3DChromium->setSwapBuffersCompleteCallbackCHROMIUM(LayerRendererSwapBuffersCompleteCallbackAdapter::create(this));
}
if (extensions->supports("GL_EXT_texture_format_BGRA8888"))
extensions->ensureEnabled("GL_EXT_texture_format_BGRA8888");
GLC(m_context.get(), m_context->getIntegerv(GraphicsContext3D::MAX_TEXTURE_SIZE, &m_capabilities.maxTextureSize));
m_capabilities.bestTextureFormat = PlatformColor::bestTextureFormat(m_context.get());
if (!initializeSharedObjects())
return false;
m_headsUpDisplay = CCHeadsUpDisplay::create(this);
// Make sure the viewport and context gets initialized, even if it is to zero.
viewportChanged();
return true;
}
LayerRendererChromium::LayerRendererChromium(PassRefPtr<GraphicsContext3D> context,
PassOwnPtr<TilePaintInterface> contentPaint)
: m_viewportScrollPosition(IntPoint(-1, -1))
, m_rootLayer(0)
, m_rootLayerContentPaint(contentPaint)
, m_currentShader(0)
, m_currentRenderSurface(0)
, m_offscreenFramebufferId(0)
, m_compositeOffscreen(false)
, m_context(context)
, m_childContextsWereCopied(false)
, m_contextSupportsLatch(false)
, m_animating(false)
, m_defaultRenderSurface(0)
{
m_contextSupportsLatch = m_context->getExtensions()->supports("GL_CHROMIUM_latch");
m_contextSupportsMapSub = m_context->getExtensions()->supports("GL_CHROMIUM_map_sub");
if (m_contextSupportsMapSub)
m_context->getExtensions()->ensureEnabled("GL_CHROMIUM_map_sub");
m_hardwareCompositing = initializeSharedObjects();
m_rootLayerContentTiler = LayerTilerChromium::create(this, IntSize(256, 256), LayerTilerChromium::NoBorderTexels);
ASSERT(m_rootLayerContentTiler);
m_headsUpDisplay = CCHeadsUpDisplay::create(this);
}
LayerRendererChromium::LayerRendererChromium(PassOwnPtr<GLES2Context> gles2Context)
: m_rootLayerTextureId(0)
, m_rootLayerTextureWidth(0)
, m_rootLayerTextureHeight(0)
, m_scrollShaderProgram(0)
, m_rootLayer(0)
, m_needsDisplay(false)
, m_scrollPosition(IntPoint(-1, -1))
, m_currentShader(0)
, m_gles2Context(gles2Context)
{
m_hardwareCompositing = (m_gles2Context && initializeSharedObjects());
}