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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrBatchAtlas.h"
#include "GrBatchFlushState.h"
#include "GrRectanizer.h"
#include "GrTracing.h"
////////////////////////////////////////////////////////////////////////////////
GrBatchAtlas::BatchPlot::BatchPlot(int index, uint64_t genID, int offX, int offY, int width,
int height, GrPixelConfig config)
: fLastUpload(GrBatchDrawToken::AlreadyFlushedToken())
, fLastUse(GrBatchDrawToken::AlreadyFlushedToken())
, fIndex(index)
, fGenID(genID)
, fID(CreateId(fIndex, fGenID))
, fData(nullptr)
, fWidth(width)
, fHeight(height)
, fX(offX)
, fY(offY)
, fRects(nullptr)
, fOffset(SkIPoint16::Make(fX * fWidth, fY * fHeight))
, fConfig(config)
, fBytesPerPixel(GrBytesPerPixel(config))
#ifdef SK_DEBUG
, fDirty(false)
#endif
{
fDirtyRect.setEmpty();
}
GrBatchAtlas::BatchPlot::~BatchPlot() {
sk_free(fData);
delete fRects;
}
bool GrBatchAtlas::BatchPlot::addSubImage(int width, int height, const void* image,
SkIPoint16* loc) {
SkASSERT(width <= fWidth && height <= fHeight);
if (!fRects) {
fRects = GrRectanizer::Factory(fWidth, fHeight);
}
if (!fRects->addRect(width, height, loc)) {
return false;
}
if (!fData) {
fData = reinterpret_cast<unsigned char*>(sk_calloc_throw(fBytesPerPixel * fWidth *
fHeight));
}
size_t rowBytes = width * fBytesPerPixel;
const unsigned char* imagePtr = (const unsigned char*)image;
// point ourselves at the right starting spot
unsigned char* dataPtr = fData;
dataPtr += fBytesPerPixel * fWidth * loc->fY;
dataPtr += fBytesPerPixel * loc->fX;
// copy into the data buffer
for (int i = 0; i < height; ++i) {
memcpy(dataPtr, imagePtr, rowBytes);
dataPtr += fBytesPerPixel * fWidth;
imagePtr += rowBytes;
}
fDirtyRect.join(loc->fX, loc->fY, loc->fX + width, loc->fY + height);
loc->fX += fOffset.fX;
loc->fY += fOffset.fY;
SkDEBUGCODE(fDirty = true;)
return true;
}
void GrBatchAtlas::BatchPlot::uploadToTexture(GrDrawBatch::WritePixelsFn& writePixels,
GrTexture* texture) {
// We should only be issuing uploads if we are in fact dirty
SkASSERT(fDirty && fData && texture);
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("skia.gpu"), "GrBatchPlot::uploadToTexture");
size_t rowBytes = fBytesPerPixel * fWidth;
const unsigned char* dataPtr = fData;
dataPtr += rowBytes * fDirtyRect.fTop;
dataPtr += fBytesPerPixel * fDirtyRect.fLeft;
writePixels(texture, fOffset.fX + fDirtyRect.fLeft, fOffset.fY + fDirtyRect.fTop,
fDirtyRect.width(), fDirtyRect.height(), fConfig, dataPtr, rowBytes);
fDirtyRect.setEmpty();
SkDEBUGCODE(fDirty = false;)
}
void GrBatchAtlas::BatchPlot::resetRects() {
if (fRects) {
fRects->reset();
}
fGenID++;
fID = CreateId(fIndex, fGenID);
// zero out the plot
if (fData) {
sk_bzero(fData, fBytesPerPixel * fWidth * fHeight);
}
fDirtyRect.setEmpty();
SkDEBUGCODE(fDirty = false;)
}
///////////////////////////////////////////////////////////////////////////////
GrBatchAtlas::GrBatchAtlas(GrTexture* texture, int numPlotsX, int numPlotsY)
: fTexture(texture)
, fAtlasGeneration(kInvalidAtlasGeneration + 1) {
fPlotWidth = texture->width() / numPlotsX;
fPlotHeight = texture->height() / numPlotsY;
SkASSERT(numPlotsX * numPlotsY <= BulkUseTokenUpdater::kMaxPlots);
SkASSERT(fPlotWidth * numPlotsX == texture->width());
SkASSERT(fPlotHeight * numPlotsY == texture->height());
SkDEBUGCODE(fNumPlots = numPlotsX * numPlotsY;)
// We currently do not support compressed atlases...
SkASSERT(!GrPixelConfigIsCompressed(texture->desc().fConfig));
// set up allocated plots
fPlotArray = new SkAutoTUnref<BatchPlot>[numPlotsX * numPlotsY];
SkAutoTUnref<BatchPlot>* currPlot = fPlotArray;
for (int y = numPlotsY - 1, r = 0; y >= 0; --y, ++r) {
for (int x = numPlotsX - 1, c = 0; x >= 0; --x, ++c) {
uint32_t index = r * numPlotsX + c;
currPlot->reset(new BatchPlot(index, 1, x, y, fPlotWidth, fPlotHeight,
texture->desc().fConfig));
// build LRU list
fPlotList.addToHead(currPlot->get());
++currPlot;
}
}
}
GrBatchAtlas::~GrBatchAtlas() {
SkSafeUnref(fTexture);
delete[] fPlotArray;
}
void GrBatchAtlas::processEviction(AtlasID id) {
for (int i = 0; i < fEvictionCallbacks.count(); i++) {
(*fEvictionCallbacks[i].fFunc)(id, fEvictionCallbacks[i].fData);
}
}
inline void GrBatchAtlas::updatePlot(GrDrawBatch::Target* target, AtlasID* id, BatchPlot* plot) {
this->makeMRU(plot);
// If our most recent upload has already occurred then we have to insert a new
// upload. Otherwise, we already have a scheduled upload that hasn't yet ocurred.
// This new update will piggy back on that previously scheduled update.
if (target->hasDrawBeenFlushed(plot->lastUploadToken())) {
// With c+14 we could move sk_sp into lamba to only ref once.
sk_sp<BatchPlot> plotsp(SkRef(plot));
GrTexture* texture = fTexture;
GrBatchDrawToken lastUploadToken = target->addAsapUpload(
[plotsp, texture] (GrDrawBatch::WritePixelsFn& writePixels) {
plotsp->uploadToTexture(writePixels, texture);
}
);
plot->setLastUploadToken(lastUploadToken);
}
*id = plot->id();
}
bool GrBatchAtlas::addToAtlas(AtlasID* id, GrDrawBatch::Target* target,
int width, int height, const void* image, SkIPoint16* loc) {
// We should already have a texture, TODO clean this up
SkASSERT(fTexture);
if (width > fPlotWidth || height > fPlotHeight) {
return false;
}
// now look through all allocated plots for one we can share, in Most Recently Refed order
GrBatchPlotList::Iter plotIter;
plotIter.init(fPlotList, GrBatchPlotList::Iter::kHead_IterStart);
BatchPlot* plot;
while ((plot = plotIter.get())) {
SkASSERT(GrBytesPerPixel(fTexture->desc().fConfig) == plot->bpp());
if (plot->addSubImage(width, height, image, loc)) {
this->updatePlot(target, id, plot);
return true;
}
plotIter.next();
}
// If the above fails, then see if the least recently refed plot has already been flushed to the
// gpu
plot = fPlotList.tail();
SkASSERT(plot);
if (target->hasDrawBeenFlushed(plot->lastUseToken())) {
this->processEviction(plot->id());
plot->resetRects();
SkASSERT(GrBytesPerPixel(fTexture->desc().fConfig) == plot->bpp());
SkDEBUGCODE(bool verify = )plot->addSubImage(width, height, image, loc);
SkASSERT(verify);
this->updatePlot(target, id, plot);
fAtlasGeneration++;
return true;
}
// If this plot has been used in a draw that is currently being prepared by a batch, then we
// have to fail. This gives the batch a chance to enqueue the draw, and call back into this
// function. When that draw is enqueued, the draw token advances, and the subsequent call will
// continue past this branch and prepare an inline upload that will occur after the enqueued
// draw which references the plot's pre-upload content.
if (plot->lastUseToken() == target->nextDrawToken()) {
return false;
}
SkASSERT(!plot->unique()); // The GrPlotUpdater should have a ref too
this->processEviction(plot->id());
fPlotList.remove(plot);
SkAutoTUnref<BatchPlot>& newPlot = fPlotArray[plot->index()];
newPlot.reset(plot->clone());
fPlotList.addToHead(newPlot.get());
SkASSERT(GrBytesPerPixel(fTexture->desc().fConfig) == newPlot->bpp());
SkDEBUGCODE(bool verify = )newPlot->addSubImage(width, height, image, loc);
SkASSERT(verify);
// Note that this plot will be uploaded inline with the draws whereas the
// one it displaced most likely was uploaded asap.
// With c+14 we could move sk_sp into lamba to only ref once.
sk_sp<BatchPlot> plotsp(SkRef(newPlot.get()));
GrTexture* texture = fTexture;
GrBatchDrawToken lastUploadToken = target->addInlineUpload(
[plotsp, texture] (GrDrawBatch::WritePixelsFn& writePixels) {
plotsp->uploadToTexture(writePixels, texture);
}
);
newPlot->setLastUploadToken(lastUploadToken);
*id = newPlot->id();
fAtlasGeneration++;
return true;
}
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