145 lines
4.4 KiB
C++
145 lines
4.4 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTileMode.h"
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/*
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* Want to ensure that our bitmap sampler (in bitmap shader) keeps plenty of
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* precision when scaling very large images (where the dx might get very small.
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*/
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#define W 257
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#define H 161
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class GiantBitmapGM : public skiagm::GM {
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SkBitmap* fBM;
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SkTileMode fMode;
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bool fDoFilter;
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bool fDoRotate;
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const SkBitmap& getBitmap() {
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if (nullptr == fBM) {
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fBM = new SkBitmap;
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fBM->allocN32Pixels(W, H);
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fBM->eraseColor(SK_ColorWHITE);
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const SkColor colors[] = {
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SK_ColorBLUE, SK_ColorRED, SK_ColorBLACK, SK_ColorGREEN
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};
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SkCanvas canvas(*fBM);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setStrokeWidth(SkIntToScalar(20));
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#if 0
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for (int y = -H*2; y < H; y += 50) {
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SkScalar yy = SkIntToScalar(y);
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paint.setColor(colors[y/50 & 0x3]);
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canvas.drawLine(0, yy, SkIntToScalar(W), yy + SkIntToScalar(W),
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paint);
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}
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#else
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for (int x = -W; x < W; x += 60) {
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paint.setColor(colors[x/60 & 0x3]);
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SkScalar xx = SkIntToScalar(x);
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canvas.drawLine(xx, 0, xx, SkIntToScalar(H),
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paint);
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}
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#endif
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}
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return *fBM;
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}
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public:
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GiantBitmapGM(SkTileMode mode, bool doFilter, bool doRotate) : fBM(nullptr) {
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fMode = mode;
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fDoFilter = doFilter;
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fDoRotate = doRotate;
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}
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~GiantBitmapGM() override { delete fBM; }
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protected:
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SkString onShortName() override {
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SkString str("giantbitmap_");
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switch (fMode) {
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case SkTileMode::kClamp:
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str.append("clamp");
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break;
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case SkTileMode::kRepeat:
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str.append("repeat");
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break;
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case SkTileMode::kMirror:
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str.append("mirror");
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break;
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case SkTileMode::kDecal:
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str.append("decal");
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break;
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default:
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break;
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}
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str.append(fDoFilter ? "_bilerp" : "_point");
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str.append(fDoRotate ? "_rotate" : "_scale");
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return str;
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}
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SkISize onISize() override { return SkISize::Make(640, 480); }
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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SkMatrix m;
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if (fDoRotate) {
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m.setSkew(SK_Scalar1, 0, 0, 0);
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} else {
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SkScalar scale = 11*SK_Scalar1/12;
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m.setScale(scale, scale);
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}
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paint.setShader(getBitmap().makeShader(
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fMode, fMode,
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SkSamplingOptions(fDoFilter ? SkFilterMode::kLinear
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: SkFilterMode::kNearest),
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m));
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canvas->translate(50, 50);
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canvas->drawPaint(paint);
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}
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private:
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using INHERITED = GM;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, false, false); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, false, false); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, false, false); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, true, false); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, true, false); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, true, false); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, false, true); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, false, true); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, false, true); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kClamp, true, true); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kRepeat, true, true); )
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DEF_GM( return new GiantBitmapGM(SkTileMode::kMirror, true, true); )
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