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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 "gm.h"
#include "SkColorPriv.h"
#include "SkGradientShader.h"
#include "SkImage.h"
#include "SkRandom.h"
#include "SkShader.h"
#include "SkSurface.h"
static SkImage* makebm(SkCanvas* caller, int w, int h) {
SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);
SkAutoTUnref<SkSurface> surface(caller->newSurface(info));
if (nullptr == surface) {
surface.reset(SkSurface::NewRaster(info));
}
SkCanvas* canvas = surface->getCanvas();
const SkScalar wScalar = SkIntToScalar(w);
const SkScalar hScalar = SkIntToScalar(h);
const SkPoint pt = { wScalar / 2, hScalar / 2 };
const SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar);
static const SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
SK_ColorGREEN, SK_ColorMAGENTA,
SK_ColorBLUE, SK_ColorCYAN,
SK_ColorRED};
static const SkScalar pos[] = {0,
SK_Scalar1 / 6,
2 * SK_Scalar1 / 6,
3 * SK_Scalar1 / 6,
4 * SK_Scalar1 / 6,
5 * SK_Scalar1 / 6,
SK_Scalar1};
SkASSERT(SK_ARRAY_COUNT(colors) == SK_ARRAY_COUNT(pos));
SkPaint paint;
SkRect rect = SkRect::MakeWH(wScalar, hScalar);
SkMatrix mat = SkMatrix::I();
for (int i = 0; i < 4; ++i) {
paint.setShader(SkGradientShader::CreateRadial(
pt, radius,
colors, pos,
SK_ARRAY_COUNT(colors),
SkShader::kRepeat_TileMode,
0, &mat))->unref();
canvas->drawRect(rect, paint);
rect.inset(wScalar / 8, hScalar / 8);
mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
}
return surface->newImageSnapshot();
}
static const int gSize = 1024;
static const int gSurfaceSize = 2048;
// This GM calls drawImageRect several times using the same texture. This is
// intended to exercise batching of these calls.
class DrawMiniBitmapRectGM : public skiagm::GM {
public:
DrawMiniBitmapRectGM(bool antiAlias) : fAA(antiAlias) {
fName.set("drawminibitmaprect");
if (fAA) {
fName.appendf("_aa");
}
}
protected:
SkString onShortName() override { return fName; }
SkISize onISize() override { return SkISize::Make(gSize, gSize); }
void onDraw(SkCanvas* canvas) override {
if (nullptr == fImage) {
fImage.reset(makebm(canvas, gSurfaceSize, gSurfaceSize));
}
const SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
static const int kMaxSrcRectSize = 1 << (SkNextLog2(gSurfaceSize) + 2);
static const int kPadX = 30;
static const int kPadY = 40;
int rowCount = 0;
canvas->translate(SkIntToScalar(kPadX), SkIntToScalar(kPadY));
canvas->save();
SkRandom random;
SkPaint paint;
paint.setAntiAlias(fAA);
for (int w = 1; w <= kMaxSrcRectSize; w *= 3) {
for (int h = 1; h <= kMaxSrcRectSize; h *= 3) {
const SkIRect srcRect =
SkIRect::MakeXYWH((gSurfaceSize - w) / 2, (gSurfaceSize - h) / 2, w, h);
canvas->save();
switch (random.nextU() % 3) {
case 0:
canvas->rotate(random.nextF() * 10.f);
break;
case 1:
canvas->rotate(-random.nextF() * 10.f);
break;
case 2:
// rect stays rect
break;
}
canvas->drawImageRect(fImage, srcRect, dstRect, &paint,
SkCanvas::kFast_SrcRectConstraint);
canvas->restore();
canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
++rowCount;
if ((dstRect.width() + 2 * kPadX) * rowCount > gSize) {
canvas->restore();
canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
canvas->save();
rowCount = 0;
}
}
}
canvas->restore();
}
private:
bool fAA;
SkAutoTUnref<SkImage> fImage;
SkString fName;
typedef skiagm::GM INHERITED;
};
DEF_GM( return new DrawMiniBitmapRectGM(true); )
DEF_GM( return new DrawMiniBitmapRectGM(false); )
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