74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/*
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* Copyright 2016 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/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.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/SkTileMode.h"
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#include "include/effects/SkGradientShader.h"
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#include <initializer_list>
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#include <utility>
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namespace skiagm {
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// Draw stroked rects (both AA and nonAA) with all the types of joins:
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// bevel, miter, miter-limited-to-bevel, round
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// and as a hairline.
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DEF_SIMPLE_GM(stroke_rect_shader, canvas, 690, 300) {
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constexpr SkRect kRect {0, 0, 100, 100};
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constexpr SkPoint kPts[] {{kRect.fLeft, kRect.fTop}, {kRect.fRight, kRect.fBottom}};
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constexpr SkColor kColors[] {SK_ColorRED, SK_ColorBLUE};
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SkPaint paint;
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sk_sp<SkShader> shader = SkGradientShader::MakeLinear(kPts, kColors, nullptr, 2,
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SkTileMode::kClamp);
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paint.setShader(std::move(shader));
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paint.setStyle(SkPaint::kStroke_Style);
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// Do a large initial translate so that local coords disagree with device coords significantly
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// for the first rect drawn.
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canvas->translate(kRect.centerX(), kRect.centerY());
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constexpr SkScalar kPad = 20;
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for (auto aa : {false, true}) {
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paint.setAntiAlias(aa);
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canvas->save();
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constexpr SkScalar kStrokeWidth = 10;
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paint.setStrokeWidth(kStrokeWidth);
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paint.setStrokeJoin(SkPaint::kBevel_Join);
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canvas->drawRect(kRect, paint);
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canvas->translate(kRect.width() + kPad, 0);
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paint.setStrokeJoin(SkPaint::kMiter_Join);
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canvas->drawRect(kRect, paint);
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canvas->translate(kRect.width() + kPad, 0);
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// This miter limit should effectively produce a bevel join.
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paint.setStrokeMiter(0.01f);
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canvas->drawRect(kRect, paint);
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canvas->translate(kRect.width() + kPad, 0);
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paint.setStrokeJoin(SkPaint::kRound_Join);
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canvas->drawRect(kRect, paint);
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canvas->translate(kRect.width() + kPad, 0);
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paint.setStrokeWidth(0);
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canvas->drawRect(kRect, paint);
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canvas->restore();
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canvas->translate(0, kRect.height() + kPad);
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}
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}
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} // namespace skiagm
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