/* * Copyright (C) 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" #if USE(ACCELERATED_COMPOSITING) #include "LayerTile.h" #include "TextureCacheCompositingThread.h" namespace WebCore { LayerTile::LayerTile() : m_scale(0) , m_contentsDirty(false) , m_visible(false) { } LayerTile::~LayerTile() { // Make sure to unprotect the texture if needed. setVisible(false); } void LayerTile::setContents(BlackBerry::Platform::Graphics::Buffer* contents) { m_scale = 0; // Resolution independent setTexture(textureCacheCompositingThread()->textureForContents(contents)); } void LayerTile::updateContents(BlackBerry::Platform::Graphics::Buffer* contents, double scale) { m_scale = scale; setTexture(textureCacheCompositingThread()->updateContents(m_texture, contents)); } void LayerTile::discardContents() { m_scale = 0; // Unknown scale setTexture(0); } void LayerTile::setVisible(bool visible) { if (visible == m_visible) return; m_visible = visible; if (!m_texture) return; // Protect the texture from being evicted from cache // if we are visible. if (visible) m_texture->protect(); else m_texture->unprotect(); } void LayerTile::setTexture(PassRefPtr<LayerTexture> texture) { // Clear this flag regardless of the value of the texture parameter. // If it's 0, isDirty() will return true anyway. // If it's the same texture, perhaps there was no more detailed texture // available than the one we already had, and keeping the dirty flag will // result in an endless loop of updating to the same texture. m_contentsDirty = false; if (texture == m_texture) return; // Move protection over to the new texture. if (m_visible) { if (m_texture) m_texture->unprotect(); if (texture) texture->protect(); } m_texture = texture; } } // namespace WebCore #endif // USE(ACCELERATED_COMPOSITING)