e3b4c5097a
This cl contains the code for CPU generation of noise. TEST:Added 'perlinnoise' gm Review URL: https://codereview.chromium.org/13094003 git-svn-id: http://skia.googlecode.com/svn/trunk@8541 2bbb7eff-a529-9590-31e7-b0007b416f81
115 lines
4.3 KiB
C++
115 lines
4.3 KiB
C++
/*
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* Copyright 2013 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.h"
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#include "SkPerlinNoiseShader.h"
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namespace skiagm {
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class PerlinNoiseGM : public GM {
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public:
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PerlinNoiseGM() {
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this->setBGColor(0xFF000000);
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fSize = SkISize::Make(80, 80);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("perlinnoise");
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}
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virtual SkISize onISize() {
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return make_isize(500, 400);
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}
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void drawClippedRect(SkCanvas* canvas, int x, int y, const SkPaint& paint) {
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canvas->save();
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canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
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SkIntToScalar(fSize.width()), SkIntToScalar(fSize.height())));
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SkRect r = SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
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SkIntToScalar(fSize.width()),
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SkIntToScalar(fSize.height()));
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canvas->drawRect(r, paint);
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canvas->restore();
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}
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void test(SkCanvas* canvas, int x, int y, SkPerlinNoiseShader::Type type,
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float baseFrequencyX, float baseFrequencyY, int numOctaves, float seed,
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bool stitchTiles)
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{
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SkShader* shader = (type == SkPerlinNoiseShader::kFractalNoise_Type) ?
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SkPerlinNoiseShader::CreateFractalNoise(baseFrequencyX, baseFrequencyY, numOctaves,
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seed, stitchTiles ? &fSize : NULL) :
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SkPerlinNoiseShader::CreateTubulence(baseFrequencyX, baseFrequencyY, numOctaves,
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seed, stitchTiles ? &fSize : NULL);
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SkPaint paint;
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paint.setShader(shader)->unref();
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drawClippedRect(canvas, x, y, paint);
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}
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virtual void onDraw(SkCanvas* canvas) {
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canvas->clear(0x00000000);
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test(canvas, 0, 0, SkPerlinNoiseShader::kFractalNoise_Type,
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0.1f, 0.1f, 2, 0, false);
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test(canvas, 100, 0, SkPerlinNoiseShader::kFractalNoise_Type,
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0.4f, 0.2f, 3, 0, true);
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test(canvas, 200, 0, SkPerlinNoiseShader::kFractalNoise_Type,
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0.3f, 0.6f, 4, 0, false);
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test(canvas, 300, 0, SkPerlinNoiseShader::kFractalNoise_Type,
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0.2f, 0.4f, 5, 0, true);
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test(canvas, 400, 0, SkPerlinNoiseShader::kFractalNoise_Type,
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0.5f, 0.8f, 6, 0, false);
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test(canvas, 0, 100, SkPerlinNoiseShader::kTurbulence_Type,
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0.1f, 0.1f, 2, 0, true);
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test(canvas, 100, 100, SkPerlinNoiseShader::kTurbulence_Type,
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0.4f, 0.2f, 3, 0, false);
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test(canvas, 200, 100, SkPerlinNoiseShader::kTurbulence_Type,
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0.3f, 0.6f, 4, 0, true);
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test(canvas, 300, 100, SkPerlinNoiseShader::kTurbulence_Type,
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0.2f, 0.4f, 5, 0, false);
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test(canvas, 400, 100, SkPerlinNoiseShader::kTurbulence_Type,
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0.5f, 0.8f, 6, 0, true);
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test(canvas, 0, 200, SkPerlinNoiseShader::kFractalNoise_Type,
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0.1f, 0.1f, 3, 1, false);
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test(canvas, 100, 200, SkPerlinNoiseShader::kFractalNoise_Type,
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0.1f, 0.1f, 3, 2, false);
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test(canvas, 200, 200, SkPerlinNoiseShader::kFractalNoise_Type,
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0.1f, 0.1f, 3, 3, false);
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test(canvas, 300, 200, SkPerlinNoiseShader::kFractalNoise_Type,
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0.1f, 0.1f, 3, 4, false);
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test(canvas, 400, 200, SkPerlinNoiseShader::kFractalNoise_Type,
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0.1f, 0.1f, 3, 5, false);
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canvas->scale(SkFloatToScalar(0.75f), SkFloatToScalar(1.0f));
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test(canvas, 0, 300, SkPerlinNoiseShader::kFractalNoise_Type,
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0.1f, 0.1f, 2, 0, false);
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test(canvas, 100, 300, SkPerlinNoiseShader::kFractalNoise_Type,
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0.4f, 0.2f, 3, 0, true);
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test(canvas, 200, 300, SkPerlinNoiseShader::kFractalNoise_Type,
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0.3f, 0.6f, 4, 0, false);
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test(canvas, 300, 300, SkPerlinNoiseShader::kFractalNoise_Type,
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0.2f, 0.4f, 5, 0, true);
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test(canvas, 400, 300, SkPerlinNoiseShader::kFractalNoise_Type,
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0.5f, 0.8f, 6, 0, false);
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}
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private:
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typedef GM INHERITED;
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SkISize fSize;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new PerlinNoiseGM; }
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static GMRegistry reg(MyFactory);
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}
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