// When bliting, if the item from the transfer queue is mismatching b/t the
// BaseTile and the content, then the item is considered as obsolete, and
// the content is discarded.
bool TransferQueue::checkObsolete(int index)
{
BaseTile* baseTilePtr = m_transferQueue[index].savedBaseTilePtr;
if (!baseTilePtr) {
XLOG("Invalid savedBaseTilePtr , such that the tile is obsolete");
return true;
}
BaseTileTexture* baseTileTexture = baseTilePtr->backTexture();
if (!baseTileTexture) {
XLOG("Invalid baseTileTexture , such that the tile is obsolete");
return true;
}
const TextureTileInfo* tileInfo = &m_transferQueue[index].tileInfo;
if (tileInfo->m_x != baseTilePtr->x()
|| tileInfo->m_y != baseTilePtr->y()
|| tileInfo->m_scale != baseTilePtr->scale()
|| tileInfo->m_painter != baseTilePtr->painter()) {
XLOG("Mismatching x, y, scale or painter , such that the tile is obsolete");
return true;
}
return false;
}
void TiledPage::prepareRow(bool goingLeft, int tilesInRow, int firstTileX, int y, const SkIRect& tileBounds)
{
for (int i = 0; i < tilesInRow; i++) {
int x = firstTileX;
// If we are goingLeft, we want to schedule the tiles starting from the
// right (and to the left if not). This is because tiles are appended to
// the list and the texture uploader goes through the set front to back.
if (goingLeft)
x += (tilesInRow - 1) - i;
else
x += i;
BaseTile* currentTile = 0;
BaseTile* availableTile = 0;
for (int j = 0; j < m_baseTileSize; j++) {
BaseTile& tile = m_baseTiles[j];
if (tile.x() == x && tile.y() == y) {
currentTile = &tile;
break;
}
if (!availableTile || (tile.drawCount() < availableTile->drawCount()))
availableTile = &tile;
}
if (!currentTile && availableTile) {
XLOG("STEALING tile %d, %d (draw count %llu) for tile %d, %d",
availableTile->x(), availableTile->y(), availableTile->drawCount(), x, y);
availableTile->discardTextures(); // don't wait for textures to be stolen
currentTile = availableTile;
}
if (!currentTile) {
XLOG("ERROR: No tile available for tile %d %d", x, y);
}
if (currentTile) {
currentTile->setGLWebViewState(m_glWebViewState);
currentTile->setPage(this);
currentTile->setContents(this, x, y, m_scale);
// TODO: move below (which is largely the same for layers / tiled
// page) into prepare() function
// ensure there is a texture associated with the tile and then check to
// see if the texture is dirty and in need of repainting
if (currentTile->isDirty() || !currentTile->frontTexture())
currentTile->reserveTexture();
if (currentTile->backTexture()
&& currentTile->isDirty()
&& !currentTile->isRepaintPending()) {
PaintTileOperation *operation = new PaintTileOperation(currentTile);
TilesManager::instance()->scheduleOperation(operation);
}
}
}
}