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 #include "tools/fonts/FontToolUtils.h"
22
make_bm(SkBitmap * bm)23 static void make_bm(SkBitmap* bm) {
24 const SkColor colors[4] = {
25 SK_ColorRED, SK_ColorGREEN,
26 SK_ColorBLUE, SK_ColorWHITE
27 };
28 SkPMColor colorsPM[4];
29 for (size_t i = 0; i < std::size(colors); ++i) {
30 colorsPM[i] = SkPreMultiplyColor(colors[i]);
31 }
32 bm->allocN32Pixels(2, 2, true);
33
34 *bm->getAddr32(0, 0) = colorsPM[0];
35 *bm->getAddr32(1, 0) = colorsPM[1];
36 *bm->getAddr32(0, 1) = colorsPM[2];
37 *bm->getAddr32(1, 1) = colorsPM[3];
38 }
39
draw_bm(SkCanvas * canvas,sk_sp<SkImage> img,SkScalar x,SkScalar y,const SkSamplingOptions & sampling,SkPaint * paint)40 static SkScalar draw_bm(SkCanvas* canvas, sk_sp<SkImage> img, SkScalar x, SkScalar y,
41 const SkSamplingOptions& sampling, SkPaint* paint) {
42 canvas->drawImage(img, x, y, sampling, paint);
43 return SkIntToScalar(img->width()) * 5/4;
44 }
45
draw_set(SkCanvas * c,sk_sp<SkImage> img,SkScalar x,SkPaint * p)46 static SkScalar draw_set(SkCanvas* c, sk_sp<SkImage> img, SkScalar x, SkPaint* p) {
47 x += draw_bm(c, img, x, 0, SkSamplingOptions(), p);
48 x += draw_bm(c, img, x, 0, SkSamplingOptions(SkFilterMode::kLinear), p);
49 p->setDither(true);
50 return x + draw_bm(c, img, x, 0, SkSamplingOptions(SkFilterMode::kLinear), p);
51 }
52
draw_row(SkCanvas * canvas,sk_sp<SkImage> img)53 static SkScalar draw_row(SkCanvas* canvas, sk_sp<SkImage> img) {
54 SkAutoCanvasRestore acr(canvas, true);
55
56 SkPaint paint;
57 paint.setAntiAlias(true);
58
59 SkScalar x = 0;
60 const int scale = 32;
61
62 SkFont font = ToolUtils::DefaultPortableFont();
63 const char* name = ToolUtils::colortype_name(img->colorType());
64 canvas->drawString(name, x, SkIntToScalar(img->height())*scale*5/8, font, paint);
65 canvas->translate(SkIntToScalar(48), 0);
66
67 canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
68
69 x += draw_set(canvas, img, 0, &paint);
70 paint.reset();
71 paint.setAlphaf(0.5f);
72 draw_set(canvas, img, x, &paint);
73 return x * scale / 3;
74 }
75
76 class FilterGM : public skiagm::GM {
onOnceBeforeDraw()77 void onOnceBeforeDraw() override {
78 SkBitmap bm32, bm4444, bm565;
79 make_bm(&bm32);
80 ToolUtils::copy_to(&bm4444, kARGB_4444_SkColorType, bm32);
81 ToolUtils::copy_to(&bm565, kRGB_565_SkColorType, bm32);
82
83 fImg32 = bm32.asImage();
84 fImg4444 = bm4444.asImage();
85 fImg565 = bm565.asImage();
86 }
87
88 public:
89 sk_sp<SkImage> fImg32, fImg4444, fImg565;
90
FilterGM()91 FilterGM() {
92 this->setBGColor(0xFFDDDDDD);
93 }
94
95 protected:
getName() const96 SkString getName() const override { return SkString("bitmapfilters"); }
97
getISize()98 SkISize getISize() override { return SkISize::Make(540, 250); }
99
onDraw(SkCanvas * canvas)100 void onDraw(SkCanvas* canvas) override {
101 SkScalar x = SkIntToScalar(10);
102 SkScalar y = SkIntToScalar(10);
103
104 canvas->translate(x, y);
105 y = draw_row(canvas, fImg4444);
106 canvas->translate(0, y);
107 y = draw_row(canvas, fImg565);
108 canvas->translate(0, y);
109 draw_row(canvas, fImg32);
110 }
111
112 private:
113 using INHERITED = skiagm::GM;
114 };
115 DEF_GM( return new FilterGM; )
116
117 //////////////////////////////////////////////////////////////////////////////
118
119 class TestExtractAlphaGM : public skiagm::GM {
onOnceBeforeDraw()120 void onOnceBeforeDraw() override {
121 // Make a bitmap with per-pixels alpha (stroked circle)
122 fBitmap.allocN32Pixels(100, 100);
123 SkCanvas canvas(fBitmap);
124 canvas.clear(0);
125
126 SkPaint paint;
127 paint.setAntiAlias(true);
128 paint.setColor(SK_ColorBLUE);
129 paint.setStyle(SkPaint::kStroke_Style);
130 paint.setStrokeWidth(20);
131
132 canvas.drawCircle(50, 50, 39, paint);
133
134 fBitmap.extractAlpha(&fAlpha);
135 }
136
137 public:
138 SkBitmap fBitmap, fAlpha;
139
140 protected:
getName() const141 SkString getName() const override { return SkString("extractalpha"); }
142
getISize()143 SkISize getISize() override { return SkISize::Make(540, 330); }
144
onDraw(SkCanvas * canvas)145 void onDraw(SkCanvas* canvas) override {
146 SkPaint paint;
147 paint.setAntiAlias(true);
148 paint.setColor(SK_ColorRED);
149
150 SkSamplingOptions sampling(SkFilterMode::kLinear);
151
152 // should stay blue (ignore paint's color)
153 canvas->drawImage(fBitmap.asImage(), 10, 10, sampling, &paint);
154 // should draw red
155 canvas->drawImage(fAlpha.asImage(), 120, 10, sampling, &paint);
156 }
157
158 private:
159 using INHERITED = skiagm::GM;
160 };
161 DEF_GM( return new TestExtractAlphaGM; )
162