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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkGradientShader.h"
namespace skiagm {
// Draw stroked rects (both AA and nonAA) with all the types of joins:
// bevel, miter, miter-limited-to-bevel, round
// and as a hairline.
DEF_SIMPLE_GM(stroke_rect_shader, canvas, 690, 300) {
static constexpr SkRect kRect {0, 0, 100, 100};
static constexpr SkPoint kPts[] {{kRect.fLeft, kRect.fTop}, {kRect.fRight, kRect.fBottom}};
static constexpr SkColor kColors[] {SK_ColorRED, SK_ColorBLUE};
SkPaint paint;
sk_sp<SkShader> shader = SkGradientShader::MakeLinear(kPts, kColors, nullptr, 2,
SkShader::kClamp_TileMode);
paint.setShader(std::move(shader));
paint.setStyle(SkPaint::kStroke_Style);
// Do a large initial translate so that local coords disagree with device coords significantly
// for the first rect drawn.
canvas->translate(kRect.centerX(), kRect.centerY());
static constexpr SkScalar kPad = 20;
for (auto aa : {false, true}) {
paint.setAntiAlias(aa);
canvas->save();
static constexpr SkScalar kStrokeWidth = 10;
paint.setStrokeWidth(kStrokeWidth);
paint.setStrokeJoin(SkPaint::kBevel_Join);
canvas->drawRect(kRect, paint);
canvas->translate(kRect.width() + kPad, 0);
paint.setStrokeJoin(SkPaint::kMiter_Join);
canvas->drawRect(kRect, paint);
canvas->translate(kRect.width() + kPad, 0);
// This miter limit should effectively produce a bevel join.
paint.setStrokeMiter(0.01f);
canvas->drawRect(kRect, paint);
canvas->translate(kRect.width() + kPad, 0);
paint.setStrokeJoin(SkPaint::kRound_Join);
canvas->drawRect(kRect, paint);
canvas->translate(kRect.width() + kPad, 0);
paint.setStrokeWidth(0);
canvas->drawRect(kRect, paint);
canvas->restore();
canvas->translate(0, kRect.height() + kPad);
}
}
}
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