1 // Copyright 2020 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4
5 REG_FIDDLE(Octopus_Generator, 256, 256, false, 0) {
6 #include <random>
7
paintOctopus(float x,float y,int size_base,SkColor color,SkCanvas * canvas)8 void paintOctopus(float x, float y, int size_base, SkColor color, SkCanvas* canvas) {
9 // Set up the paint to draw the head and legs
10 SkPaint paint;
11 paint.setAntiAlias(true);
12 paint.setColor(color);
13 int radius = 3 * size_base;
14 // Draw the big head
15 canvas->drawCircle(x, y, radius, paint);
16 // Draw 8 small legs
17 for (int leg = 0; leg < 8; ++leg) {
18 canvas->drawCircle(x - radius + (2 * radius / 7.5 * leg),
19 y + radius - pow(abs(4 - leg), 2), size_base / 2 + 2, paint);
20 }
21 // Make the color a bit lighter for the eyes
22 paint.setColor(SkColorSetRGB(std::min(255u, SkColorGetR(color) + 20),
23 std::min(255u, SkColorGetG(color) + 20),
24 std::min(255u, SkColorGetB(color) + 20)));
25 // Draw the left and right eye
26 canvas->drawCircle(x - size_base, y + size_base, size_base / 2, paint);
27 canvas->drawCircle(x + size_base, y + size_base, size_base / 2, paint);
28 }
29
draw(SkCanvas * canvas)30 void draw(SkCanvas* canvas) {
31 // Some helper functions to create random coordinates, sizes, and colors
32 std::default_random_engine rng;
33 const auto randScalar = [&rng](SkScalar min, SkScalar max) -> SkScalar {
34 return std::uniform_real_distribution<SkScalar>(min, max)(rng);
35 };
36 const auto randOpaqueColor = [&rng]() -> SkColor {
37 return std::uniform_int_distribution<uint32_t>(0, 0xFFFFFF)(rng) | 0xFF000000;
38 };
39
40 constexpr int numOctopods = 400;
41 for (int i = 0; i < numOctopods; ++i) {
42 paintOctopus(randScalar(0, 256), randScalar(0, 256),
43 randScalar(6, 12), randOpaqueColor(), canvas);
44 }
45 }
46 } // END FIDDLE
47