1 /*
2 * Copyright 2011 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/gm.h"
9 #include "include/core/SkBitmap.h"
10 #include "include/core/SkCanvas.h"
11 #include "include/core/SkColor.h"
12 #include "include/core/SkFont.h"
13 #include "include/core/SkImageInfo.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkScalar.h"
16 #include "include/core/SkSize.h"
17 #include "include/core/SkString.h"
18 #include "include/core/SkTypeface.h"
19 #include "include/core/SkTypes.h"
20 #include "tools/ToolUtils.h"
21
make_bm(SkBitmap * bm)22 static void make_bm(SkBitmap* bm) {
23 const SkColor colors[4] = {
24 SK_ColorRED, SK_ColorGREEN,
25 SK_ColorBLUE, SK_ColorWHITE
26 };
27 SkPMColor colorsPM[4];
28 for (size_t i = 0; i < SK_ARRAY_COUNT(colors); ++i) {
29 colorsPM[i] = SkPreMultiplyColor(colors[i]);
30 }
31 bm->allocN32Pixels(2, 2, true);
32
33 *bm->getAddr32(0, 0) = colorsPM[0];
34 *bm->getAddr32(1, 0) = colorsPM[1];
35 *bm->getAddr32(0, 1) = colorsPM[2];
36 *bm->getAddr32(1, 1) = colorsPM[3];
37 }
38
draw_bm(SkCanvas * canvas,sk_sp<SkImage> img,SkScalar x,SkScalar y,const SkSamplingOptions & sampling,SkPaint * paint)39 static SkScalar draw_bm(SkCanvas* canvas, sk_sp<SkImage> img, SkScalar x, SkScalar y,
40 const SkSamplingOptions& sampling, SkPaint* paint) {
41 canvas->drawImage(img, x, y, sampling, paint);
42 return SkIntToScalar(img->width()) * 5/4;
43 }
44
draw_set(SkCanvas * c,sk_sp<SkImage> img,SkScalar x,SkPaint * p)45 static SkScalar draw_set(SkCanvas* c, sk_sp<SkImage> img, SkScalar x, SkPaint* p) {
46 x += draw_bm(c, img, x, 0, SkSamplingOptions(), p);
47 x += draw_bm(c, img, x, 0, SkSamplingOptions(SkFilterMode::kLinear), p);
48 p->setDither(true);
49 return x + draw_bm(c, img, x, 0, SkSamplingOptions(SkFilterMode::kLinear), p);
50 }
51
draw_row(SkCanvas * canvas,sk_sp<SkImage> img)52 static SkScalar draw_row(SkCanvas* canvas, sk_sp<SkImage> img) {
53 SkAutoCanvasRestore acr(canvas, true);
54
55 SkPaint paint;
56 paint.setAntiAlias(true);
57
58 SkScalar x = 0;
59 const int scale = 32;
60
61 SkFont font(ToolUtils::create_portable_typeface());
62 const char* name = ToolUtils::colortype_name(img->colorType());
63 canvas->drawString(name, x, SkIntToScalar(img->height())*scale*5/8, font, paint);
64 canvas->translate(SkIntToScalar(48), 0);
65
66 canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
67
68 x += draw_set(canvas, img, 0, &paint);
69 paint.reset();
70 paint.setAlphaf(0.5f);
71 draw_set(canvas, img, x, &paint);
72 return x * scale / 3;
73 }
74
75 class FilterGM : public skiagm::GM {
onOnceBeforeDraw()76 void onOnceBeforeDraw() override {
77 SkBitmap bm32, bm4444, bm565;
78 make_bm(&bm32);
79 ToolUtils::copy_to(&bm4444, kARGB_4444_SkColorType, bm32);
80 ToolUtils::copy_to(&bm565, kRGB_565_SkColorType, bm32);
81
82 fImg32 = bm32.asImage();
83 fImg4444 = bm4444.asImage();
84 fImg565 = bm565.asImage();
85 }
86
87 public:
88 sk_sp<SkImage> fImg32, fImg4444, fImg565;
89
FilterGM()90 FilterGM() {
91 this->setBGColor(0xFFDDDDDD);
92 }
93
94 protected:
onShortName()95 SkString onShortName() override {
96 return SkString("bitmapfilters");
97 }
98
onISize()99 SkISize onISize() override {
100 return SkISize::Make(540, 250);
101 }
102
onDraw(SkCanvas * canvas)103 void onDraw(SkCanvas* canvas) override {
104 SkScalar x = SkIntToScalar(10);
105 SkScalar y = SkIntToScalar(10);
106
107 canvas->translate(x, y);
108 y = draw_row(canvas, fImg4444);
109 canvas->translate(0, y);
110 y = draw_row(canvas, fImg565);
111 canvas->translate(0, y);
112 draw_row(canvas, fImg32);
113 }
114
115 private:
116 using INHERITED = skiagm::GM;
117 };
118 DEF_GM( return new FilterGM; )
119
120 //////////////////////////////////////////////////////////////////////////////
121
122 class TestExtractAlphaGM : public skiagm::GM {
onOnceBeforeDraw()123 void onOnceBeforeDraw() override {
124 // Make a bitmap with per-pixels alpha (stroked circle)
125 fBitmap.allocN32Pixels(100, 100);
126 SkCanvas canvas(fBitmap);
127 canvas.clear(0);
128
129 SkPaint paint;
130 paint.setAntiAlias(true);
131 paint.setColor(SK_ColorBLUE);
132 paint.setStyle(SkPaint::kStroke_Style);
133 paint.setStrokeWidth(20);
134
135 canvas.drawCircle(50, 50, 39, paint);
136
137 fBitmap.extractAlpha(&fAlpha);
138 }
139
140 public:
141 SkBitmap fBitmap, fAlpha;
142
143 protected:
onShortName()144 SkString onShortName() override {
145 return SkString("extractalpha");
146 }
147
onISize()148 SkISize onISize() override {
149 return SkISize::Make(540, 330);
150 }
151
onDraw(SkCanvas * canvas)152 void onDraw(SkCanvas* canvas) override {
153 SkPaint paint;
154 paint.setAntiAlias(true);
155 paint.setColor(SK_ColorRED);
156
157 SkSamplingOptions sampling(SkFilterMode::kLinear);
158
159 // should stay blue (ignore paint's color)
160 canvas->drawImage(fBitmap.asImage(), 10, 10, sampling, &paint);
161 // should draw red
162 canvas->drawImage(fAlpha.asImage(), 120, 10, sampling, &paint);
163 }
164
165 private:
166 using INHERITED = skiagm::GM;
167 };
168 DEF_GM( return new TestExtractAlphaGM; )
169