skia2/docs/examples/strokerect_gm.cpp
Hal Canary 6c8422c671 add more docs/examples from named fiddles.
ignore offscreen, srgb, and animated fiddles for now.

Change-Id: I923131b684865698e6cda138b004930e11f504d5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263713
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
2020-01-14 19:22:26 +00:00

66 lines
2.6 KiB
C++

// Copyright 2020 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "tools/fiddle/examples.h"
REG_FIDDLE(strokerect_gm, 1400, 740, false, 0) {
void draw(SkCanvas* canvas) {
constexpr SkScalar kStrokeWidth = 20;
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, kStrokeWidth, H},
{0, 0, W, kStrokeWidth},
{0, 0, kStrokeWidth / 2, kStrokeWidth / 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},
};
canvas->translate(kStrokeWidth * 3 / 2, kStrokeWidth * 3 / 2);
for (int doFill = 0; doFill <= 1; ++doFill) {
SkPaint::Style style = doFill ? SkPaint::kStrokeAndFill_Style : SkPaint::kStroke_Style;
for (size_t i = 0; i < SK_ARRAY_COUNT(gJoins); ++i) {
SkPaint::Join join = gJoins[i];
for (size_t j = 0; j < SK_ARRAY_COUNT(gRects); ++j) {
SkAutoCanvasRestore acr(canvas, true);
canvas->translate(
j * (W + 2 * kStrokeWidth),
(i + doFill * SK_ARRAY_COUNT(gJoins)) * (H + 2 * kStrokeWidth));
const SkRect& rect = gRects[j];
SkPath path, fillPath;
path.addRect(rect);
SkPaint paint;
paint.setStrokeWidth(kStrokeWidth);
paint.setStyle(style);
paint.setStrokeJoin(join);
paint.getFillPath(path, &fillPath);
paint.setAntiAlias(true);
paint.setColor(0xFF8C8A8C);
canvas->drawRect(rect, paint);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(0);
paint.setColor(SK_ColorRED);
canvas->drawPath(fillPath, paint);
paint.setStrokeWidth(3);
paint.setStrokeJoin(SkPaint::kMiter_Join);
int n = fillPath.countPoints();
SkAutoTArray<SkPoint> points(n);
fillPath.getPoints(points.get(), n);
canvas->drawPoints(SkCanvas::kPoints_PointMode, n, points.get(), paint);
}
}
}
}
} // END FIDDLE