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/*
* Copyright 2012 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 "SkCanvas.h"
#include "SkPath.h"
#define STROKE_WIDTH SkIntToScalar(20)
static void draw_path(SkCanvas* canvas, const SkPath& path, const SkRect& rect,
SkPaint::Join join, int doFill) {
SkPaint paint;
paint.setAntiAlias(true);
paint.setStyle(doFill ? SkPaint::kStrokeAndFill_Style : SkPaint::kStroke_Style);
paint.setColor(sk_tool_utils::color_to_565(SK_ColorGRAY));
paint.setStrokeWidth(STROKE_WIDTH);
paint.setStrokeJoin(join);
canvas->drawRect(rect, paint);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(0);
paint.setColor(SK_ColorRED);
canvas->drawPath(path, paint);
paint.setStrokeWidth(3);
paint.setStrokeJoin(SkPaint::kMiter_Join);
int n = path.countPoints();
SkAutoTArray<SkPoint> points(n);
path.getPoints(points.get(), n);
canvas->drawPoints(SkCanvas::kPoints_PointMode, n, points.get(), paint);
}
/*
* Test calling SkStroker for rectangles. Cases to cover:
*
* geometry: normal, small (smaller than stroke-width), empty, inverted
* joint-type for the corners
*/
class StrokeRectGM : public skiagm::GM {
public:
StrokeRectGM() {}
protected:
SkString onShortName() override {
return SkString("strokerect");
}
SkISize onISize() override {
return SkISize::Make(1400, 740);
}
void onDraw(SkCanvas* canvas) override {
canvas->drawColor(SK_ColorWHITE);
canvas->translate(STROKE_WIDTH*3/2, STROKE_WIDTH*3/2);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(STROKE_WIDTH);
constexpr SkPaint::Join gJoins[] = {
SkPaint::kMiter_Join, SkPaint::kRound_Join, SkPaint::kBevel_Join
};
constexpr SkScalar W = 80;
constexpr SkScalar H = 80;
constexpr SkRect gRects[] = {
{ 0, 0, W, H },
{ W, 0, 0, H },
{ 0, H, W, 0 },
{ 0, 0, STROKE_WIDTH, H },
{ 0, 0, W, STROKE_WIDTH },
{ 0, 0, STROKE_WIDTH/2, STROKE_WIDTH/2 },
{ 0, 0, W, 0 },
{ 0, 0, 0, H },
{ 0, 0, 0, 0 },
{ 0, 0, W, FLT_EPSILON },
{ 0, 0, FLT_EPSILON, H },
{ 0, 0, FLT_EPSILON, FLT_EPSILON },
};
for (int doFill = 0; doFill <= 1; ++doFill) {
for (size_t i = 0; i < SK_ARRAY_COUNT(gJoins); ++i) {
SkPaint::Join join = gJoins[i];
paint.setStrokeJoin(join);
SkAutoCanvasRestore acr(canvas, true);
for (size_t j = 0; j < SK_ARRAY_COUNT(gRects); ++j) {
const SkRect& r = gRects[j];
SkPath path, fillPath;
path.addRect(r);
paint.getFillPath(path, &fillPath);
draw_path(canvas, fillPath, r, join, doFill);
canvas->translate(W + 2 * STROKE_WIDTH, 0);
}
acr.restore();
canvas->translate(0, H + 2 * STROKE_WIDTH);
}
paint.setStyle(SkPaint::kStrokeAndFill_Style);
}
}
private:
typedef GM INHERITED;
};
DEF_GM(return new StrokeRectGM;)
///////////////////////////////////////////////////////////////////////////////////////////////////
/*
* Exercise rect-stroking (which is specialized from paths) when the resulting stroke-width is
* non-square. See https://bugs.chromium.org/p/skia/issues/detail?id=5408
*/
DEF_SIMPLE_GM(strokerect_anisotropic_5408, canvas, 200, 50) {
SkPaint p;
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(6);
canvas->scale(10, 1);
SkRect r = SkRect::MakeXYWH(5, 20, 10, 10);
canvas->drawRect(r, p);
}
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