// get a plot that's not being used by the current draw
GrPlot* GrAtlasMgr::getUnusedPlot() {
GrPlotList::Iter plotIter;
plotIter.init(fPlotList, GrPlotList::Iter::kTail_IterStart);
GrPlot* plot;
while (NULL != (plot = plotIter.get())) {
if (plot->drawToken().isIssued()) {
return plot;
}
plotIter.prev();
}
return NULL;
}
GrPlot* GrAtlas::addToAtlas(ClientPlotUsage* usage,
int width, int height, const void* image,
SkIPoint16* loc) {
// iterate through entire plot list for this atlas, see if we can find a hole
// last one was most recently added and probably most empty
for (int i = usage->fPlots.count()-1; i >= 0; --i) {
GrPlot* plot = usage->fPlots[i];
// client may have plots from more than one atlas, must check for ours before adding
if (this == plot->fAtlas && plot->addSubImage(width, height, image, loc)) {
this->makeMRU(plot);
return plot;
}
}
// before we get a new plot, make sure we have a backing texture
if (NULL == fTexture) {
// TODO: Update this to use the cache rather than directly creating a texture.
GrSurfaceDesc desc;
desc.fFlags = fFlags;
desc.fWidth = fBackingTextureSize.width();
desc.fHeight = fBackingTextureSize.height();
desc.fConfig = fPixelConfig;
fTexture = fGpu->createTexture(desc, true, NULL, 0);
if (NULL == fTexture) {
return NULL;
}
}
// now look through all allocated plots for one we can share, in MRU order
GrPlotList::Iter plotIter;
plotIter.init(fPlotList, GrPlotList::Iter::kHead_IterStart);
GrPlot* plot;
while ((plot = plotIter.get())) {
// make sure texture is set for quick lookup
plot->fTexture = fTexture;
if (plot->addSubImage(width, height, image, loc)) {
this->makeMRU(plot);
// new plot for atlas, put at end of array
SkASSERT(!usage->fPlots.contains(plot));
*(usage->fPlots.append()) = plot;
return plot;
}
plotIter.next();
}
// If the above fails, then the current plot list has no room
return NULL;
}
GrPlot* GrAtlasMgr::addToAtlas(GrAtlas* atlas,
int width, int height, const void* image,
GrIPoint16* loc) {
// iterate through entire plot list for this atlas, see if we can find a hole
// last one was most recently added and probably most empty
for (int i = atlas->fPlots.count()-1; i >= 0; --i) {
GrPlot* plot = atlas->fPlots[i];
if (plot->addSubImage(width, height, image, loc)) {
this->moveToHead(plot);
return plot;
}
}
// before we get a new plot, make sure we have a backing texture
if (NULL == fTexture) {
// TODO: Update this to use the cache rather than directly creating a texture.
GrTextureDesc desc;
desc.fFlags = kDynamicUpdate_GrTextureFlagBit;
desc.fWidth = GR_ATLAS_TEXTURE_WIDTH;
desc.fHeight = GR_ATLAS_TEXTURE_HEIGHT;
desc.fConfig = fPixelConfig;
fTexture = fGpu->createTexture(desc, NULL, 0);
if (NULL == fTexture) {
return NULL;
}
}
// now look through all allocated plots for one we can share, in MRU order
GrPlotList::Iter plotIter;
plotIter.init(fPlotList, GrPlotList::Iter::kHead_IterStart);
GrPlot* plot;
while (NULL != (plot = plotIter.get())) {
// make sure texture is set for quick lookup
plot->fTexture = fTexture;
if (plot->addSubImage(width, height, image, loc)) {
this->moveToHead(plot);
// new plot for atlas, put at end of array
*(atlas->fPlots.append()) = plot;
return plot;
}
plotIter.next();
}
// If the above fails, then the current plot list has no room
return NULL;
}