1 /*
2 * Copyright 2012 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 "SkLightingImageFilter.h"
10
11 #define WIDTH 330
12 #define HEIGHT 440
13
14 namespace skiagm {
15
16 class ImageLightingGM : public GM {
17 public:
ImageLightingGM()18 ImageLightingGM() : fInitialized(false) {
19 this->setBGColor(0xFF000000);
20 }
21
22 protected:
onGetFlags() const23 virtual uint32_t onGetFlags() const SK_OVERRIDE {
24 return kSkipTiled_Flag;
25 }
26
onShortName()27 virtual SkString onShortName() {
28 return SkString("lighting");
29 }
30
make_bitmap()31 void make_bitmap() {
32 fBitmap.allocN32Pixels(100, 100);
33 SkCanvas canvas(fBitmap);
34 canvas.clear(0x00000000);
35 SkPaint paint;
36 paint.setAntiAlias(true);
37 paint.setColor(0xFFFFFFFF);
38 paint.setTextSize(SkIntToScalar(96));
39 const char* str = "e";
40 canvas.drawText(str, strlen(str), SkIntToScalar(20), SkIntToScalar(70), paint);
41 }
42
onISize()43 virtual SkISize onISize() {
44 return SkISize::Make(WIDTH, HEIGHT);
45 }
46
drawClippedBitmap(SkCanvas * canvas,const SkPaint & paint,int x,int y)47 void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) {
48 canvas->save();
49 canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
50 canvas->clipRect(SkRect::MakeWH(
51 SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
52 canvas->drawBitmap(fBitmap, 0, 0, &paint);
53 canvas->restore();
54 }
55
onDraw(SkCanvas * canvas)56 virtual void onDraw(SkCanvas* canvas) {
57 if (!fInitialized) {
58 make_bitmap();
59 fInitialized = true;
60 }
61 canvas->clear(0xFF101010);
62 SkPaint checkPaint;
63 checkPaint.setColor(0xFF202020);
64 for (int y = 0; y < HEIGHT; y += 16) {
65 for (int x = 0; x < WIDTH; x += 16) {
66 canvas->save();
67 canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
68 canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), checkPaint);
69 canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), checkPaint);
70 canvas->restore();
71 }
72 }
73 SkPoint3 pointLocation(0, 0, SkIntToScalar(10));
74 SkScalar azimuthRad = SkDegreesToRadians(SkIntToScalar(225));
75 SkScalar elevationRad = SkDegreesToRadians(SkIntToScalar(5));
76 SkPoint3 distantDirection(SkScalarMul(SkScalarCos(azimuthRad), SkScalarCos(elevationRad)),
77 SkScalarMul(SkScalarSin(azimuthRad), SkScalarCos(elevationRad)),
78 SkScalarSin(elevationRad));
79 SkPoint3 spotLocation(SkIntToScalar(-10), SkIntToScalar(-10), SkIntToScalar(20));
80 SkPoint3 spotTarget(SkIntToScalar(40), SkIntToScalar(40), 0);
81 SkScalar spotExponent = SK_Scalar1;
82 SkScalar cutoffAngle = SkIntToScalar(15);
83 SkScalar kd = SkIntToScalar(2);
84 SkScalar ks = SkIntToScalar(1);
85 SkScalar shininess = SkIntToScalar(8);
86 SkScalar surfaceScale = SkIntToScalar(1);
87 SkColor white(0xFFFFFFFF);
88 SkPaint paint;
89
90 SkImageFilter::CropRect cropRect(SkRect::MakeXYWH(20, 10, 60, 65));
91
92 int y = 0;
93 for (int i = 0; i < 2; i++) {
94 const SkImageFilter::CropRect* cr = (i == 0) ? NULL : &cropRect;
95 paint.setImageFilter(SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, white, surfaceScale, kd, NULL, cr))->unref();
96 drawClippedBitmap(canvas, paint, 0, y);
97
98 paint.setImageFilter(SkLightingImageFilter::CreateDistantLitDiffuse(distantDirection, white, surfaceScale, kd, NULL, cr))->unref();
99 drawClippedBitmap(canvas, paint, 110, y);
100
101 paint.setImageFilter(SkLightingImageFilter::CreateSpotLitDiffuse(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, kd, NULL, cr))->unref();
102 drawClippedBitmap(canvas, paint, 220, y);
103
104 y += 110;
105
106 paint.setImageFilter(SkLightingImageFilter::CreatePointLitSpecular(pointLocation, white, surfaceScale, ks, shininess, NULL, cr))->unref();
107 drawClippedBitmap(canvas, paint, 0, y);
108
109 paint.setImageFilter(SkLightingImageFilter::CreateDistantLitSpecular(distantDirection, white, surfaceScale, ks, shininess, NULL, cr))->unref();
110 drawClippedBitmap(canvas, paint, 110, y);
111
112 paint.setImageFilter(SkLightingImageFilter::CreateSpotLitSpecular(spotLocation, spotTarget, spotExponent, cutoffAngle, white, surfaceScale, ks, shininess, NULL, cr))->unref();
113 drawClippedBitmap(canvas, paint, 220, y);
114
115 y += 110;
116 }
117 }
118
119 private:
120 typedef GM INHERITED;
121 SkBitmap fBitmap;
122 bool fInitialized;
123 };
124
125 //////////////////////////////////////////////////////////////////////////////
126
MyFactory(void *)127 static GM* MyFactory(void*) { return new ImageLightingGM; }
128 static GMRegistry reg(MyFactory);
129
130 }
131