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/*
* Copyright 2011 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 "SkCanvas.h"
#include "SkColorPriv.h"
#include "SkShader.h"
/*
* Want to ensure that our bitmap sampler (in bitmap shader) keeps plenty of
* precision when scaling very large images (where the dx might get very small.
*/
#define W 257
#define H 161
class GiantBitmapGM : public skiagm::GM {
SkBitmap* fBM;
SkShader::TileMode fMode;
bool fDoFilter;
bool fDoRotate;
const SkBitmap& getBitmap() {
if (nullptr == fBM) {
fBM = new SkBitmap;
fBM->allocN32Pixels(W, H);
fBM->eraseColor(SK_ColorWHITE);
const SkColor colors[] = {
SK_ColorBLUE, SK_ColorRED, SK_ColorBLACK, SK_ColorGREEN
};
SkCanvas canvas(*fBM);
SkPaint paint;
paint.setAntiAlias(true);
paint.setStrokeWidth(SkIntToScalar(20));
#if 0
for (int y = -H*2; y < H; y += 50) {
SkScalar yy = SkIntToScalar(y);
paint.setColor(colors[y/50 & 0x3]);
canvas.drawLine(0, yy, SkIntToScalar(W), yy + SkIntToScalar(W),
paint);
}
#else
for (int x = -W; x < W; x += 60) {
paint.setColor(colors[x/60 & 0x3]);
SkScalar xx = SkIntToScalar(x);
canvas.drawLine(xx, 0, xx, SkIntToScalar(H),
paint);
}
#endif
}
return *fBM;
}
public:
GiantBitmapGM(SkShader::TileMode mode, bool doFilter, bool doRotate) : fBM(nullptr) {
fMode = mode;
fDoFilter = doFilter;
fDoRotate = doRotate;
}
virtual ~GiantBitmapGM() { delete fBM; }
protected:
SkString onShortName() override {
SkString str("giantbitmap_");
switch (fMode) {
case SkShader::kClamp_TileMode:
str.append("clamp");
break;
case SkShader::kRepeat_TileMode:
str.append("repeat");
break;
case SkShader::kMirror_TileMode:
str.append("mirror");
break;
default:
break;
}
str.append(fDoFilter ? "_bilerp" : "_point");
str.append(fDoRotate ? "_rotate" : "_scale");
return str;
}
SkISize onISize() override { return SkISize::Make(640, 480); }
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
SkMatrix m;
if (fDoRotate) {
// m.setRotate(SkIntToScalar(30), 0, 0);
m.setSkew(SK_Scalar1, 0, 0, 0);
// m.postScale(2*SK_Scalar1/3, 2*SK_Scalar1/3);
} else {
SkScalar scale = 11*SK_Scalar1/12;
m.setScale(scale, scale);
}
SkShader* s = SkShader::CreateBitmapShader(getBitmap(), fMode, fMode, &m);
paint.setShader(s)->unref();
paint.setFilterQuality(fDoFilter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
canvas->translate(SkIntToScalar(50), SkIntToScalar(50));
// SkRect r = SkRect::MakeXYWH(-50, -50, 32, 16);
// canvas->drawRect(r, paint); return;
canvas->drawPaint(paint);
}
private:
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new GiantBitmapGM(SkShader::kClamp_TileMode, false, false); )
DEF_GM( return new GiantBitmapGM(SkShader::kRepeat_TileMode, false, false); )
DEF_GM( return new GiantBitmapGM(SkShader::kMirror_TileMode, false, false); )
DEF_GM( return new GiantBitmapGM(SkShader::kClamp_TileMode, true, false); )
DEF_GM( return new GiantBitmapGM(SkShader::kRepeat_TileMode, true, false); )
DEF_GM( return new GiantBitmapGM(SkShader::kMirror_TileMode, true, false); )
DEF_GM( return new GiantBitmapGM(SkShader::kClamp_TileMode, false, true); )
DEF_GM( return new GiantBitmapGM(SkShader::kRepeat_TileMode, false, true); )
DEF_GM( return new GiantBitmapGM(SkShader::kMirror_TileMode, false, true); )
DEF_GM( return new GiantBitmapGM(SkShader::kClamp_TileMode, true, true); )
DEF_GM( return new GiantBitmapGM(SkShader::kRepeat_TileMode, true, true); )
DEF_GM( return new GiantBitmapGM(SkShader::kMirror_TileMode, true, true); )
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