skia2/docs/examples/not_path_gradient.cpp
John Stiles 3e6e29cf2e Convert 0 and NULL to nullptr.
The goal was to enable -Wzero-as-null-pointer-constant. Unfortunately,
this was thwarted by VK_NULL_HANDLE which is defined as 0ULL in the
Vulkan headers. It might be possible to enable the warning for a subset
of Skia, but not for the parts which interface with Vulkan.

Change-Id: Id27f5f57d9b2676d18f319f443fdf8bb5d4fb89d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/505801
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
2022-02-09 14:20:57 +00:00

31 lines
1.1 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(not_path_gradient, 256, 256, false, 0) {
SkPath star() {
const SkScalar R = 60.0f, C = 128.0f;
SkPath path;
path.moveTo(C + R, C);
for (int i = 1; i < 15; ++i) {
SkScalar a = 0.44879895f * i;
SkScalar r = R + R * (i % 2);
path.lineTo(C + r * cos(a), C + r * sin(a));
}
return path;
}
void draw(SkCanvas* canvas) {
SkPaint paint;
paint.setPathEffect(SkDiscretePathEffect::Make(10.0f, 4.0f));
SkPoint points[2] = {SkPoint::Make(0.0f, 0.0f), SkPoint::Make(256.0f, 256.0f)};
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(10);
SkColor colors[2] = {SkColorSetRGB(0xEA, 0xD2, 0xAC), SkColorSetRGB(0x42, 0x81, 0xA4)};
paint.setShader(SkGradientShader::MakeLinear(
points, colors, nullptr, 2, SkTileMode::kClamp, 0, nullptr));
paint.setAntiAlias(true);
canvas->clear(SK_ColorWHITE);
SkPath path(star());
canvas->drawPath(path, paint);
}
} // END FIDDLE