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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkThreadedBMPDevice.h"
#include "SkPath.h"
#include "SkTaskGroup.h"
#include "SkVertices.h"
void SkThreadedBMPDevice::DrawQueue::reset() {
if (fTasks) {
fTasks->finish();
}
fSize = 0;
// using TaskGroup2D = SkSpinningTaskGroup2D;
using TaskGroup2D = SkFlexibleTaskGroup2D;
auto draw2D = [this](int row, int column){
SkThreadedBMPDevice::DrawElement& drawElement = fElements[column];
if (!SkIRect::Intersects(fDevice->fTileBounds[row], drawElement.fDrawBounds)) {
return;
}
drawElement.fDrawFn(fDevice->fTileBounds[row]);
};
fTasks.reset(new TaskGroup2D(draw2D, fDevice->fTileCnt, fDevice->fExecutor,
fDevice->fThreadCnt));
fTasks->start();
}
SkThreadedBMPDevice::SkThreadedBMPDevice(const SkBitmap& bitmap,
int tiles,
int threads,
SkExecutor* executor)
: INHERITED(bitmap)
, fTileCnt(tiles)
, fThreadCnt(threads <= 0 ? tiles : threads)
, fQueue(this)
{
if (executor == nullptr) {
fInternalExecutor = SkExecutor::MakeFIFOThreadPool(fThreadCnt);
executor = fInternalExecutor.get();
}
fExecutor = executor;
// Tiling using stripes for now; we'll explore better tiling in the future.
int h = (bitmap.height() + fTileCnt - 1) / SkTMax(fTileCnt, 1);
int w = bitmap.width();
int top = 0;
for(int tid = 0; tid < fTileCnt; ++tid, top += h) {
fTileBounds.push_back(SkIRect::MakeLTRB(0, top, w, top + h));
}
fQueue.reset();
}
void SkThreadedBMPDevice::flush() {
fQueue.reset();
}
// Having this captured in lambda seems to be faster than saving this in DrawElement
struct SkThreadedBMPDevice::DrawState {
SkPixmap fDst;
SkMatrix fMatrix;
SkRasterClip fRC;
explicit DrawState(SkThreadedBMPDevice* dev) {
// we need fDst to be set, and if we're actually drawing, to dirty the genID
if (!dev->accessPixels(&fDst)) {
// NoDrawDevice uses us (why?) so we have to catch this case w/ no pixels
fDst.reset(dev->imageInfo(), nullptr, 0);
}
fMatrix = dev->ctm();
fRC = dev->fRCStack.rc();
}
SkDraw getThreadDraw(SkRasterClip& threadRC, const SkIRect& threadBounds) const {
SkDraw draw;
draw.fDst = fDst;
draw.fMatrix = &fMatrix;
threadRC = fRC;
threadRC.op(threadBounds, SkRegion::kIntersect_Op);
draw.fRC = &threadRC;
return draw;
}
};
SkIRect SkThreadedBMPDevice::transformDrawBounds(const SkRect& drawBounds) const {
if (drawBounds.isLargest()) {
return SkIRect::MakeLargest();
}
SkRect transformedBounds;
this->ctm().mapRect(&transformedBounds, drawBounds);
return transformedBounds.roundOut();
}
// The do {...} while (false) is to enforce trailing semicolon as suggested by mtklein@
#define THREADED_DRAW(drawBounds, actualDrawCall) \
do { \
DrawState ds(this); \
fQueue.push({ \
this->transformDrawBounds(drawBounds), \
[=](const SkIRect& tileBounds) { \
SkRasterClip tileRC; \
SkDraw draw = ds.getThreadDraw(tileRC, tileBounds); \
draw.actualDrawCall; \
}, \
}); \
} while (false)
static inline SkRect get_fast_bounds(const SkRect& r, const SkPaint& p) {
SkRect result;
if (p.canComputeFastBounds()) {
result = p.computeFastBounds(r, &result);
} else {
result = SkRect::MakeLargest();
}
return result;
}
void SkThreadedBMPDevice::drawPaint(const SkPaint& paint) {
THREADED_DRAW(SkRect::MakeLargest(), drawPaint(paint));
}
void SkThreadedBMPDevice::drawPoints(SkCanvas::PointMode mode, size_t count,
const SkPoint pts[], const SkPaint& paint) {
// TODO tighter drawBounds
SkRect drawBounds = SkRect::MakeLargest();
THREADED_DRAW(drawBounds, drawPoints(mode, count, pts, paint, nullptr));
}
void SkThreadedBMPDevice::drawRect(const SkRect& r, const SkPaint& paint) {
SkRect drawBounds = get_fast_bounds(r, paint);
THREADED_DRAW(drawBounds, drawRect(r, paint));
}
void SkThreadedBMPDevice::drawRRect(const SkRRect& rrect, const SkPaint& paint) {
#ifdef SK_IGNORE_BLURRED_RRECT_OPT
SkPath path;
path.addRRect(rrect);
// call the VIRTUAL version, so any subclasses who do handle drawPath aren't
// required to override drawRRect.
this->drawPath(path, paint, nullptr, false);
#else
SkRect drawBounds = get_fast_bounds(rrect.getBounds(), paint);
THREADED_DRAW(drawBounds, drawRRect(rrect, paint));
#endif
}
void SkThreadedBMPDevice::drawPath(const SkPath& path, const SkPaint& paint,
const SkMatrix* prePathMatrix, bool pathIsMutable) {
SkRect drawBounds = path.isInverseFillType() ? SkRect::MakeLargest()
: get_fast_bounds(path.getBounds(), paint);
// For thread safety, make path imutable
THREADED_DRAW(drawBounds, drawPath(path, paint, prePathMatrix, false));
}
void SkThreadedBMPDevice::drawBitmap(const SkBitmap& bitmap, SkScalar x, SkScalar y,
const SkPaint& paint) {
SkMatrix matrix = SkMatrix::MakeTrans(x, y);
LogDrawScaleFactor(SkMatrix::Concat(this->ctm(), matrix), paint.getFilterQuality());
SkRect drawBounds = SkRect::MakeWH(bitmap.width(), bitmap.height());
matrix.mapRect(&drawBounds);
THREADED_DRAW(drawBounds, drawBitmap(bitmap, matrix, nullptr, paint));
}
void SkThreadedBMPDevice::drawSprite(const SkBitmap& bitmap, int x, int y, const SkPaint& paint) {
SkRect drawBounds = SkRect::MakeXYWH(x, y, bitmap.width(), bitmap.height());
THREADED_DRAW(drawBounds, drawSprite(bitmap, x, y, paint));
}
void SkThreadedBMPDevice::drawText(const void* text, size_t len, SkScalar x, SkScalar y,
const SkPaint& paint) {
SkRect drawBounds = SkRect::MakeLargest(); // TODO tighter drawBounds
THREADED_DRAW(drawBounds, drawText((const char*)text, len, x, y, paint, &this->surfaceProps()));
}
void SkThreadedBMPDevice::drawPosText(const void* text, size_t len, const SkScalar xpos[],
int scalarsPerPos, const SkPoint& offset, const SkPaint& paint) {
SkRect drawBounds = SkRect::MakeLargest(); // TODO tighter drawBounds
THREADED_DRAW(drawBounds, drawPosText((const char*)text, len, xpos, scalarsPerPos, offset,
paint, &surfaceProps()));
}
void SkThreadedBMPDevice::drawVertices(const SkVertices* vertices, SkBlendMode bmode,
const SkPaint& paint) {
SkRect drawBounds = SkRect::MakeLargest(); // TODO tighter drawBounds
THREADED_DRAW(drawBounds, drawVertices(vertices->mode(), vertices->vertexCount(),
vertices->positions(), vertices->texCoords(),
vertices->colors(), bmode, vertices->indices(),
vertices->indexCount(), paint));
}
void SkThreadedBMPDevice::drawDevice(SkBaseDevice* device, int x, int y, const SkPaint& paint) {
SkASSERT(!paint.getImageFilter());
SkRect drawBounds = SkRect::MakeXYWH(x, y, device->width(), device->height());
THREADED_DRAW(drawBounds,
drawSprite(static_cast<SkBitmapDevice*>(device)->fBitmap, x, y, paint));
}
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