1/*
2* Copyright 2017 Google Inc.
3*
4* Use of this source code is governed by a BSD-style license that can be
5* found in the LICENSE file.
6*/
7
8#include "gm.h"
9#include "SkCanvas.h"
10#include "SkPath.h"
11#include "SkShadowUtils.h"
12
13enum BackgroundMode {
14    kLightBackground,
15    kDarkBackground
16};
17
18static constexpr int kW = 1225;
19static constexpr int kH = 550;
20
21void draw_content(SkCanvas* canvas, BackgroundMode mode) {
22    const SkScalar kLightWidth = 600;
23    const SkScalar kAmbientAlpha = 0.03f;
24    const SkScalar kSpotAlpha = 0.25f;
25
26    const SkColor kColors[30] = {
27        // purples
28        0xFF3A0072, 0xFF5D0099, 0xFF7F12B2, 0xFFA02AD1, 0xFFC245E5,
29        0xFFE95AF9, 0xFFFC79F0, 0xFFFDA6F0, 0xFFFFCCF8, 0xFFFFE1F9,
30        // oranges
31        0xFFEA3200, 0xFFFF4E00, 0xFFFF7300, 0xFFFF9100, 0xFFFFB000,
32        0xFFFFCE00, 0xFFFFE000, 0xFFFFF64D, 0xFFFFF98F, 0xFFFFFBCC,
33        // teals
34        0xFF004D51, 0xFF066266, 0xFF057F7F, 0xFF009999, 0xFF00B2B2,
35        0xFF15CCBE, 0xFF25E5CE, 0xFF2CFFE0, 0xFF80FFEA, 0xFFB3FFF0
36    };
37
38    SkPaint paint;
39    paint.setAntiAlias(true);
40    if (mode == kDarkBackground) {
41        canvas->drawColor(0xFF111111);
42    } else {
43        canvas->drawColor(0xFFEAEAEA);
44    }
45
46    SkPath path;
47    path.addRect(SkRect::MakeXYWH(-50, -50, 100, 100));
48
49    SkPoint3 lightPos = { 75, -400, 600 };
50    SkPoint3 zPlaneParams = SkPoint3::Make(0, 0, 16);
51    SkScalar yPos = 75;
52
53    for (int row = 0; row < 3; ++row) {
54        lightPos.fX = 75;
55        SkScalar xPos = 75;
56        for (int col = 0; col < 10; ++col) {
57            paint.setColor(kColors[10 * row + col]);
58
59            canvas->save();
60            canvas->translate(xPos, yPos);
61            SkShadowUtils::DrawShadow(canvas, path, zPlaneParams,
62                                      lightPos, kLightWidth,
63                                      kAmbientAlpha, kSpotAlpha, paint.getColor(), 0);
64            canvas->drawPath(path, paint);
65            canvas->restore();
66
67            lightPos.fX += 120;
68            xPos += 120;
69        }
70
71        lightPos.fY += 200;
72        yPos += 200;
73    }
74}
75
76DEF_SIMPLE_GM(tonalshadows_light, canvas, kW, kH) {
77    draw_content(canvas, kLightBackground);
78}
79
80DEF_SIMPLE_GM(tonalshadows_dark, canvas, kW, kH) {
81    draw_content(canvas, kDarkBackground);
82}
83
84
85
86