skia2/gm/giantbitmap.cpp
Mike Reed 1f261da41e Stop using filterquality
Change-Id: I0fd8ace529cde3b36df72dd4d80bba18c1388b20
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/429497
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2021-07-18 15:48:36 +00:00

145 lines
4.4 KiB
C++

/*
* 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/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPaint.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTileMode.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;
SkTileMode 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(SkTileMode mode, bool doFilter, bool doRotate) : fBM(nullptr) {
fMode = mode;
fDoFilter = doFilter;
fDoRotate = doRotate;
}
~GiantBitmapGM() override { delete fBM; }
protected:
SkString onShortName() override {
SkString str("giantbitmap_");
switch (fMode) {
case SkTileMode::kClamp:
str.append("clamp");
break;
case SkTileMode::kRepeat:
str.append("repeat");
break;
case SkTileMode::kMirror:
str.append("mirror");
break;
case SkTileMode::kDecal:
str.append("decal");
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.setSkew(SK_Scalar1, 0, 0, 0);
} else {
SkScalar scale = 11*SK_Scalar1/12;
m.setScale(scale, scale);
}
paint.setShader(getBitmap().makeShader(
fMode, fMode,
SkSamplingOptions(fDoFilter ? SkFilterMode::kLinear
: SkFilterMode::kNearest),
m));
canvas->translate(50, 50);
canvas->drawPaint(paint);
}
private:
using INHERITED = GM;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, false, false); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, false, false); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, false, false); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, true, false); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, true, false); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, true, false); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, false, true); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, false, true); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, false, true); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, true, true); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, true, true); )
DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, true, true); )