ea60b951d7
Change-Id: Ieac05047826b1fb80950d65573d38494a1a5c5e7 Reviewed-on: https://skia-review.googlesource.com/148383 Commit-Queue: Hal Canary <halcanary@google.com> Commit-Queue: Ben Wagner <bungeman@google.com> Auto-Submit: Hal Canary <halcanary@google.com> Reviewed-by: Ben Wagner <bungeman@google.com>
108 lines
3.0 KiB
C++
108 lines
3.0 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 "DecodeFile.h"
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#include "Sample.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkGraphics.h"
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#include "SkPath.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkUTF.h"
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#include "SkColorPriv.h"
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#include "SkColorFilter.h"
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#include "SkTime.h"
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#include "SkTypeface.h"
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static sk_sp<SkShader> make_bitmapfade(const SkBitmap& bm) {
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SkPoint pts[2];
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SkColor colors[2];
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pts[0].set(0, 0);
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pts[1].set(0, SkIntToScalar(bm.height()));
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colors[0] = SK_ColorBLACK;
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colors[1] = SkColorSetARGB(0, 0, 0, 0);
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auto shaderA = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode);
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auto shaderB = SkShader::MakeBitmapShader(bm,
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SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
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return SkShader::MakeComposeShader(std::move(shaderB), std::move(shaderA), SkBlendMode::kDstIn);
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}
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class ShaderView : public Sample {
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public:
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sk_sp<SkShader> fShader;
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SkBitmap fBitmap;
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ShaderView() {
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decode_file("/skimages/logo.gif", &fBitmap);
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SkPoint pts[2];
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SkColor colors[2];
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pts[0].set(0, 0);
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pts[1].set(SkIntToScalar(100), 0);
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colors[0] = SK_ColorRED;
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colors[1] = SK_ColorBLUE;
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auto shaderA = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode);
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pts[0].set(0, 0);
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pts[1].set(0, SkIntToScalar(100));
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colors[0] = SK_ColorBLACK;
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colors[1] = SkColorSetARGB(0x80, 0, 0, 0);
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auto shaderB = SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kClamp_TileMode);
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fShader = SkShader::MakeComposeShader(std::move(shaderA), std::move(shaderB),
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SkBlendMode::kDstIn);
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}
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protected:
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bool onQuery(Sample::Event* evt) override {
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if (Sample::TitleQ(*evt)) {
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Sample::TitleR(evt, "Shaders");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void onDrawContent(SkCanvas* canvas) override {
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canvas->drawBitmap(fBitmap, 0, 0);
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canvas->translate(20, 120);
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SkPaint paint;
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SkRect r;
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paint.setColor(SK_ColorGREEN);
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canvas->drawRect(SkRect::MakeWH(100, 100), paint);
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paint.setShader(fShader);
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canvas->drawRect(SkRect::MakeWH(100, 100), paint);
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canvas->translate(SkIntToScalar(110), 0);
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int w = fBitmap.width();
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int h = fBitmap.height();
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w = 120;
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h = 80;
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r.set(0, 0, SkIntToScalar(w), SkIntToScalar(h));
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paint.setShader(nullptr);
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canvas->drawRect(r, paint);
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paint.setShader(make_bitmapfade(fBitmap));
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canvas->drawRect(r, paint);
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}
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private:
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typedef Sample INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_SAMPLE( return new ShaderView(); )
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