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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.
*/
#include "gm.h"
#include "SampleCode.h"
#include "SkRandom.h"
#include "SkUtils.h"
#if SK_SUPPORT_GPU
#include "GrRectanizer_pow2.h"
#include "GrRectanizer_skyline.h"
// This slide visualizes the various GrRectanizer-derived classes behavior
// for various input sets
// 'j' will cycle through the various rectanizers
// Pow2 -> GrRectanizerPow2
// Skyline -> GrRectanizerSkyline
// 'h' will cycle through the various rect sets
// Rand -> random rects from 2-256
// Pow2Rand -> random power of 2 sized rects from 2-256
// SmallPow2 -> 128x128 rects
class RectanizerView : public SampleView {
public:
RectanizerView()
: fCurRandRect(0) {
for (int i = 0; i < 3; ++i) {
fRects[i].setReserve(kNumRandRects);
}
fRectLocations.setReserve(kNumRandRects);
SkRandom random;
for (int i = 0; i < kNumRandRects; ++i) {
*fRects[0].append() = SkISize::Make(random.nextRangeU(kMinRectSize, kMaxRectSize),
random.nextRangeU(kMinRectSize, kMaxRectSize));
*fRects[1].append() = SkISize::Make(
GrNextPow2(random.nextRangeU(kMinRectSize, kMaxRectSize)),
GrNextPow2(random.nextRangeU(kMinRectSize, kMaxRectSize)));
*fRects[2].append() = SkISize::Make(128, 128);
*fRectLocations.append() = SkIPoint16::Make(0, 0);
}
fCurRects = &fRects[0];
fRectanizers[0] = new GrRectanizerPow2(kWidth, kHeight);
fRectanizers[1] = new GrRectanizerSkyline(kWidth, kHeight);
fCurRectanizer = fRectanizers[0];
}
protected:
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Rectanizer");
return true;
}
SkUnichar uni;
if (SampleCode::CharQ(*evt, &uni)) {
char utf8[kMaxBytesInUTF8Sequence];
size_t size = SkUTF8_FromUnichar(uni, utf8);
// Only consider events for single char keys
if (1 == size) {
switch (utf8[0]) {
case kCycleRectanizerKey:
this->cycleRectanizer();
return true;
case kCycleRectsKey:
this->cycleRects();
return true;
default:
break;
}
}
}
return this->INHERITED::onQuery(evt);
}
void onDrawContent(SkCanvas* canvas) override {
if (fCurRandRect < kNumRandRects) {
if (fCurRectanizer->addRect((*fCurRects)[fCurRandRect].fWidth,
(*fCurRects)[fCurRandRect].fHeight,
&fRectLocations[fCurRandRect])) {
++fCurRandRect;
}
}
SkPaint blackBigFont;
blackBigFont.setTextSize(20);
SkPaint blackStroke;
blackStroke.setStyle(SkPaint::kStroke_Style);
SkPaint redFill;
redFill.setColor(SK_ColorRED);
SkRect r = SkRect::MakeWH(SkIntToScalar(kWidth), SkIntToScalar(kHeight));
canvas->clear(SK_ColorWHITE);
canvas->drawRect(r, blackStroke);
long totArea = 0;
for (int i = 0; i < fCurRandRect; ++i) {
r = SkRect::MakeXYWH(SkIntToScalar(fRectLocations[i].fX),
SkIntToScalar(fRectLocations[i].fY),
SkIntToScalar((*fCurRects)[i].fWidth),
SkIntToScalar((*fCurRects)[i].fHeight));
canvas->drawRect(r, redFill);
canvas->drawRect(r, blackStroke);
totArea += (*fCurRects)[i].fWidth * (*fCurRects)[i].fHeight;
}
SkString str;
str.printf("%s-%s: tot Area: %ld %%full: %.2f (%.2f) numTextures: %d/%d",
this->getRectanizerName(),
this->getRectsName(),
totArea,
100.0f * fCurRectanizer->percentFull(),
100.0f * totArea / ((float)kWidth*kHeight),
fCurRandRect,
kNumRandRects);
canvas->drawText(str.c_str(), str.size(), 50, kHeight + 50, blackBigFont);
str.printf("Press \'j\' to toggle rectanizer");
canvas->drawText(str.c_str(), str.size(), 50, kHeight + 100, blackBigFont);
str.printf("Press \'h\' to toggle rects");
canvas->drawText(str.c_str(), str.size(), 50, kHeight + 150, blackBigFont);
this->inval(nullptr);
}
private:
static const int kWidth = 1024;
static const int kHeight = 1024;
static const int kNumRandRects = 200;
static const char kCycleRectanizerKey = 'j';
static const char kCycleRectsKey = 'h';
static const int kMinRectSize = 2;
static const int kMaxRectSize = 256;
int fCurRandRect;
SkTDArray<SkISize> fRects[3];
SkTDArray<SkISize>* fCurRects;
SkTDArray<SkIPoint16> fRectLocations;
GrRectanizer* fRectanizers[2];
GrRectanizer* fCurRectanizer;
const char* getRectanizerName() const {
if (fCurRectanizer == fRectanizers[0]) {
return "Pow2";
} else {
return "Skyline";
}
}
void cycleRectanizer() {
if (fCurRectanizer == fRectanizers[0]) {
fCurRectanizer = fRectanizers[1];
} else {
fCurRectanizer = fRectanizers[0];
}
fCurRectanizer->reset();
fCurRandRect = 0;
}
const char* getRectsName() const {
if (fCurRects == &fRects[0]) {
return "Rand";
} else if (fCurRects == &fRects[1]) {
return "Pow2Rand";
} else {
return "SmallPow2";
}
}
void cycleRects() {
if (fCurRects == &fRects[0]) {
fCurRects = &fRects[1];
} else if (fCurRects == &fRects[1]) {
fCurRects = &fRects[2];
} else {
fCurRects = &fRects[0];
}
fCurRectanizer->reset();
fCurRandRect = 0;
}
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new RectanizerView; }
static SkViewRegister reg(MyFactory);
#endif
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