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#include "DMQuiltTask.h"
#include "DMUtil.h"
#include "DMWriteTask.h"
#include "SkBBHFactory.h"
#include "SkCommandLineFlags.h"
#include "SkPicture.h"
#include "SkTaskGroup.h"
DEFINE_bool(quilt, true, "If true, draw GM via a picture into a quilt of small tiles and compare.");
DEFINE_int32(quiltTile, 256, "Dimension of (square) quilt tile.");
namespace DM {
static const char* kBBHs[] = { "nobbh", "rtree", "tilegrid" };
QuiltTask::QuiltTask(const Task& parent, skiagm::GM* gm, SkBitmap reference, QuiltTask::BBH bbh)
: CpuTask(parent)
, fBBH(bbh)
, fName(UnderJoin(parent.name().c_str(), kBBHs[bbh]))
, fGM(gm)
, fReference(reference)
{}
static int tiles_needed(int fullDimension, int tileDimension) {
return (fullDimension + tileDimension - 1) / tileDimension;
}
struct DrawTileArgs {
int x, y;
const SkPicture* picture;
SkBitmap* quilt;
};
static void draw_tile(DrawTileArgs* arg) {
const DrawTileArgs& a = *arg;
SkBitmap tile;
a.quilt->extractSubset(&tile, SkIRect::MakeXYWH(a.x, a.y, FLAGS_quiltTile, FLAGS_quiltTile));
SkCanvas tileCanvas(tile);
tileCanvas.translate(SkIntToScalar(-a.x), SkIntToScalar(-a.y));
a.picture->playback(&tileCanvas);
tileCanvas.flush();
}
void QuiltTask::draw() {
SkAutoTDelete<SkBBHFactory> factory;
switch (fBBH) {
case kNone_BBH: break;
case kRTree_BBH:
factory.reset(SkNEW(SkRTreeFactory));
break;
}
// A couple GMs draw wrong when using a bounding box hierarchy.
// This almost certainly means we have a bug to fix, but for now
// just draw without a bounding box hierarchy.
if (fGM->getFlags() & skiagm::GM::kNoBBH_Flag) {
factory.reset(NULL);
}
SkAutoTUnref<const SkPicture> recorded(RecordPicture(fGM.get(), factory.get()));
SkBitmap full;
AllocatePixels(fReference, &full);
if (fGM->getFlags() & skiagm::GM::kSkipTiled_Flag) {
// Some GMs don't draw exactly the same when tiled. Draw them in one go.
SkCanvas canvas(full);
recorded->playback(&canvas);
canvas.flush();
} else {
// Draw tiles in parallel into the same bitmap, simulating aggressive impl-side painting.
int xTiles = tiles_needed(full.width(), FLAGS_quiltTile),
yTiles = tiles_needed(full.height(), FLAGS_quiltTile);
SkTDArray<DrawTileArgs> args;
args.setCount(xTiles*yTiles);
for (int y = 0; y < yTiles; y++) {
for (int x = 0; x < xTiles; x++) {
DrawTileArgs arg = { x*FLAGS_quiltTile, y*FLAGS_quiltTile, recorded, &full };
args[y*xTiles + x] = arg;
}
}
SkTaskGroup().batch(draw_tile, args.begin(), args.count());
}
if (!BitmapsEqual(full, fReference)) {
this->fail();
this->spawnChild(SkNEW_ARGS(WriteTask, (*this, "GM", full)));
}
}
bool QuiltTask::shouldSkip() const {
if (fGM->getFlags() & skiagm::GM::kSkipPicture_Flag) {
return true;
}
return !FLAGS_quilt;
}
} // namespace DM
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