skia2/gm/stroke_rect_shader.cpp
Ben Wagner 7fde8e1728 IWYU for gms.
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

74 lines
2.4 KiB
C++

/*
* 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/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkTileMode.h"
#include "include/effects/SkGradientShader.h"
#include <initializer_list>
#include <utility>
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) {
constexpr SkRect kRect {0, 0, 100, 100};
constexpr SkPoint kPts[] {{kRect.fLeft, kRect.fTop}, {kRect.fRight, kRect.fBottom}};
constexpr SkColor kColors[] {SK_ColorRED, SK_ColorBLUE};
SkPaint paint;
sk_sp<SkShader> shader = SkGradientShader::MakeLinear(kPts, kColors, nullptr, 2,
SkTileMode::kClamp);
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());
constexpr SkScalar kPad = 20;
for (auto aa : {false, true}) {
paint.setAntiAlias(aa);
canvas->save();
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);
}
}
}