diff options
Diffstat (limited to 'chromium/third_party/skia/samplecode/SampleAnimatedGradient.cpp')
-rw-r--r-- | chromium/third_party/skia/samplecode/SampleAnimatedGradient.cpp | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/chromium/third_party/skia/samplecode/SampleAnimatedGradient.cpp b/chromium/third_party/skia/samplecode/SampleAnimatedGradient.cpp new file mode 100644 index 00000000000..79ee499fa47 --- /dev/null +++ b/chromium/third_party/skia/samplecode/SampleAnimatedGradient.cpp @@ -0,0 +1,97 @@ + +/* + * 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 "SampleCode.h" +#include "SkCanvas.h" +#include "SkGradientShader.h" + +class GradientView : public SampleView { +public: + GradientView() { + this->setBGColor(0xFFDDDDDD); + } + +protected: + struct GradData { + int fCount; + const SkColor* fColors; + const SkScalar* fPos; + }; + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, "Gradients"); + return true; + } + return this->INHERITED::onQuery(evt); + } + virtual void onDrawContent(SkCanvas* canvas) { + SkPaint paint; + paint.setAntiAlias(true); + paint.setStyle(SkPaint::kStroke_Style); + paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3))); + paint.setStyle(SkPaint::kFill_Style); + + SkPoint p = SkPoint::Make(0,0); + SkPoint q = SkPoint::Make(100,100); + SkPoint pts[] = {p, q}; + + SkScalar t, temp, x, y; + SkColor gColors[] = { + SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK + }; + t = SampleCode::GetAnimScalar(SkIntToScalar(2), SkIntToScalar(20)); + temp = SampleCode::GetAnimScalar(SkIntToScalar(1), SkIntToScalar(8)); + SkScalar step = SK_ScalarPI / (10); + SkScalar angle = t * step; + x = SkScalarSinCos(angle, &y); + SkScalar colorPositions[] = { 0, 0.1 + x, 0.4 + y, 0.9 - x + y, 1.0}; + GradData data = { 5, gColors, colorPositions }; + + + SkRect r = { 0, 0, SkIntToScalar(200), SkIntToScalar(200) }; + SkShader* shader1 = SkGradientShader::CreateLinear( + pts, data.fColors, data.fPos,data.fCount, + SkShader::kMirror_TileMode); + paint.setShader(shader1)->unref(); + + canvas->drawRect(r, paint); + + + SkPoint s = SkPoint::Make(100,100); + SkShader* shader2 = SkGradientShader::CreateRadial( + s, 100, data.fColors, data.fPos, data.fCount, + SkShader::kMirror_TileMode); + paint.setShader(shader2)->unref(); + canvas->translate(250, 0); + canvas->drawRect(r, paint); + + SkShader* shader3 = SkGradientShader::CreateTwoPointRadial( + p, 0, q, 100, data.fColors, data.fPos, data.fCount, + SkShader::kMirror_TileMode); + paint.setShader(shader3)->unref(); + canvas->translate(0, 250); + canvas->drawRect(r, paint); + + SkShader* shader4 = SkGradientShader::CreateSweep( + 100, 100, data.fColors, data.fPos, data.fCount); + + paint.setShader(shader4)->unref(); + canvas->translate(-250, 0); + canvas->drawRect(r, paint); + + this->inval(NULL); + } + +private: + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new GradientView; } +static SkViewRegister reg(MyFactory); |