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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#if SK_SUPPORT_GPU
#include "GrLayerHoister.h"
#include "GrRecordReplaceDraw.h"
#endif
#include "SkCanvas.h"
#include "SkMultiPictureDraw.h"
#include "SkPicture.h"
#include "SkTaskGroup.h"
void SkMultiPictureDraw::DrawData::draw() {
fCanvas->drawPicture(fPicture, &fMatrix, fPaint);
}
void SkMultiPictureDraw::DrawData::init(SkCanvas* canvas, const SkPicture* picture,
const SkMatrix* matrix, const SkPaint* paint) {
fPicture = SkRef(picture);
fCanvas = SkRef(canvas);
if (matrix) {
fMatrix = *matrix;
} else {
fMatrix.setIdentity();
}
if (paint) {
fPaint = SkNEW_ARGS(SkPaint, (*paint));
} else {
fPaint = NULL;
}
}
void SkMultiPictureDraw::DrawData::Reset(SkTDArray<DrawData>& data) {
for (int i = 0; i < data.count(); ++i) {
data[i].fPicture->unref();
data[i].fCanvas->unref();
SkDELETE(data[i].fPaint);
}
data.rewind();
}
//////////////////////////////////////////////////////////////////////////////////////
SkMultiPictureDraw::SkMultiPictureDraw(int reserve) {
if (reserve > 0) {
fGPUDrawData.setReserve(reserve);
fThreadSafeDrawData.setReserve(reserve);
}
}
void SkMultiPictureDraw::reset() {
DrawData::Reset(fGPUDrawData);
DrawData::Reset(fThreadSafeDrawData);
}
void SkMultiPictureDraw::add(SkCanvas* canvas,
const SkPicture* picture,
const SkMatrix* matrix,
const SkPaint* paint) {
if (NULL == canvas || NULL == picture) {
SkDEBUGFAIL("parameters to SkMultiPictureDraw::add should be non-NULL");
return;
}
SkTDArray<DrawData>& array = canvas->getGrContext() ? fGPUDrawData : fThreadSafeDrawData;
array.append()->init(canvas, picture, matrix, paint);
}
#undef SK_IGNORE_GPU_LAYER_HOISTING
#define SK_IGNORE_GPU_LAYER_HOISTING 1
class AutoMPDReset : SkNoncopyable {
SkMultiPictureDraw* fMPD;
public:
AutoMPDReset(SkMultiPictureDraw* mpd) : fMPD(mpd) {}
~AutoMPDReset() { fMPD->reset(); }
};
void SkMultiPictureDraw::draw() {
AutoMPDReset mpdreset(this);
// we place the taskgroup after the MPDReset, to ensure that we don't delete the DrawData
// objects until after we're finished the tasks (which have pointers to the data).
SkTaskGroup group;
group.batch(DrawData::Draw, fThreadSafeDrawData.begin(), fThreadSafeDrawData.count());
// we deliberately don't call wait() here, since the destructor will do that, this allows us
// to continue processing gpu-data without having to wait on the cpu tasks.
const int count = fGPUDrawData.count();
if (0 == count) {
return;
}
#ifndef SK_IGNORE_GPU_LAYER_HOISTING
GrContext* context = fGPUDrawData[0].fCanvas->getGrContext();
SkASSERT(context);
// Start by collecting all the layers that are going to be atlased and render
// them (if necessary). Hoisting the free floating layers is deferred until
// drawing the canvas that requires them.
SkTDArray<GrHoistedLayer> atlasedNeedRendering, atlasedRecycled;
for (int i = 0; i < count; ++i) {
const DrawData& data = fGPUDrawData[i];
// we only expect 1 context for all the canvases
SkASSERT(data.canvas->getGrContext() == context);
if (!data.fPaint && data.fMatrix.isIdentity()) {
// TODO: this path always tries to optimize pictures. Should we
// switch to this API approach (vs. SkCanvas::EXPERIMENTAL_optimize)?
data.fCanvas->EXPERIMENTAL_optimize(data.fPicture);
SkRect clipBounds;
if (!data.fCanvas->getClipBounds(&clipBounds)) {
continue;
}
// TODO: sorting the cacheable layers from smallest to largest
// would improve the packing and reduce the number of swaps
// TODO: another optimization would be to make a first pass to
// lock any required layer that is already in the atlas
GrLayerHoister::FindLayersToAtlas(context, data.fPicture,
clipBounds,
&atlasedNeedRendering, &atlasedRecycled);
}
}
GrLayerHoister::DrawLayersToAtlas(context, atlasedNeedRendering);
SkTDArray<GrHoistedLayer> needRendering, recycled;
#endif
for (int i = 0; i < count; ++i) {
const DrawData& data = fGPUDrawData[i];
SkCanvas* canvas = data.fCanvas;
const SkPicture* picture = data.fPicture;
#ifndef SK_IGNORE_GPU_LAYER_HOISTING
if (!data.fPaint && data.fMatrix.isIdentity()) {
SkRect clipBounds;
if (!canvas->getClipBounds(&clipBounds)) {
continue;
}
// Find the layers required by this canvas. It will return atlased
// layers in the 'recycled' list since they have already been drawn.
GrLayerHoister::FindLayersToHoist(context, picture,
clipBounds, &needRendering, &recycled);
GrLayerHoister::DrawLayers(context, needRendering);
GrReplacements replacements;
GrLayerHoister::ConvertLayersToReplacements(needRendering, &replacements);
GrLayerHoister::ConvertLayersToReplacements(recycled, &replacements);
const SkMatrix initialMatrix = canvas->getTotalMatrix();
// Render the entire picture using new layers
GrRecordReplaceDraw(picture, canvas, &replacements, initialMatrix, NULL);
GrLayerHoister::UnlockLayers(context, needRendering);
GrLayerHoister::UnlockLayers(context, recycled);
needRendering.rewind();
recycled.rewind();
} else
#endif
{
canvas->drawPicture(picture, &data.fMatrix, data.fPaint);
}
}
#ifndef SK_IGNORE_GPU_LAYER_HOISTING
GrLayerHoister::UnlockLayers(context, atlasedNeedRendering);
GrLayerHoister::UnlockLayers(context, atlasedRecycled);
#if !GR_CACHE_HOISTED_LAYERS
GrLayerHoister::PurgeCache(context);
#endif
#endif
}
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