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.h"
9 #include "sk_tool_utils.h"
10
make_bm(SkBitmap * bm)11 static void make_bm(SkBitmap* bm) {
12 const SkColor colors[4] = {
13 SK_ColorRED, SK_ColorGREEN,
14 SK_ColorBLUE, SK_ColorWHITE
15 };
16 SkPMColor colorsPM[4];
17 for (size_t i = 0; i < SK_ARRAY_COUNT(colors); ++i) {
18 colorsPM[i] = SkPreMultiplyColor(colors[i]);
19 }
20 SkColorTable* ctable = new SkColorTable(colorsPM, 4);
21
22 bm->allocPixels(SkImageInfo::Make(2, 2, kIndex_8_SkColorType,
23 kPremul_SkAlphaType),
24 nullptr, ctable);
25 ctable->unref();
26
27 *bm->getAddr8(0, 0) = 0;
28 *bm->getAddr8(1, 0) = 1;
29 *bm->getAddr8(0, 1) = 2;
30 *bm->getAddr8(1, 1) = 3;
31 }
32
draw_bm(SkCanvas * canvas,const SkBitmap & bm,SkScalar x,SkScalar y,SkPaint * paint)33 static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
34 SkScalar x, SkScalar y, SkPaint* paint) {
35 canvas->drawBitmap(bm, x, y, paint);
36 return SkIntToScalar(bm.width()) * 5/4;
37 }
38
draw_set(SkCanvas * c,const SkBitmap & bm,SkScalar x,SkPaint * p)39 static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x,
40 SkPaint* p) {
41 x += draw_bm(c, bm, x, 0, p);
42 p->setFilterQuality(kLow_SkFilterQuality);
43 x += draw_bm(c, bm, x, 0, p);
44 p->setDither(true);
45 return x + draw_bm(c, bm, x, 0, p);
46 }
47
draw_row(SkCanvas * canvas,const SkBitmap & bm)48 static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm) {
49 SkAutoCanvasRestore acr(canvas, true);
50
51 SkPaint paint;
52 SkScalar x = 0;
53 const int scale = 32;
54
55 paint.setAntiAlias(true);
56 sk_tool_utils::set_portable_typeface(&paint);
57 const char* name = sk_tool_utils::colortype_name(bm.colorType());
58 canvas->drawText(name, strlen(name), x, SkIntToScalar(bm.height())*scale*5/8,
59 paint);
60 canvas->translate(SkIntToScalar(48), 0);
61
62 canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
63
64 x += draw_set(canvas, bm, 0, &paint);
65 paint.reset();
66 paint.setAlpha(0x80);
67 draw_set(canvas, bm, x, &paint);
68 return x * scale / 3;
69 }
70
71 class FilterGM : public skiagm::GM {
onOnceBeforeDraw()72 void onOnceBeforeDraw() override {
73 make_bm(&fBM8);
74 fBM8.copyTo(&fBM4444, kARGB_4444_SkColorType);
75 fBM8.copyTo(&fBM16, kRGB_565_SkColorType);
76 fBM8.copyTo(&fBM32, kN32_SkColorType);
77 }
78
79 public:
80 SkBitmap fBM8, fBM4444, fBM16, fBM32;
81
FilterGM()82 FilterGM() {
83 this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
84 }
85
86 protected:
onShortName()87 SkString onShortName() override {
88 return SkString("bitmapfilters");
89 }
90
onISize()91 SkISize onISize() override {
92 return SkISize::Make(540, 330);
93 }
94
onDraw(SkCanvas * canvas)95 void onDraw(SkCanvas* canvas) override {
96 SkScalar x = SkIntToScalar(10);
97 SkScalar y = SkIntToScalar(10);
98
99 canvas->translate(x, y);
100 y = draw_row(canvas, fBM8);
101 canvas->translate(0, y);
102 y = draw_row(canvas, fBM4444);
103 canvas->translate(0, y);
104 y = draw_row(canvas, fBM16);
105 canvas->translate(0, y);
106 draw_row(canvas, fBM32);
107 }
108
109 private:
110 typedef skiagm::GM INHERITED;
111 };
112 DEF_GM( return new FilterGM; )
113
114 //////////////////////////////////////////////////////////////////////////////
115
116 class TestExtractAlphaGM : public skiagm::GM {
onOnceBeforeDraw()117 void onOnceBeforeDraw() override {
118 // Make a bitmap with per-pixels alpha (stroked circle)
119 fBitmap.allocN32Pixels(100, 100);
120 SkCanvas canvas(fBitmap);
121 canvas.clear(0);
122
123 SkPaint paint;
124 paint.setAntiAlias(true);
125 paint.setColor(SK_ColorBLUE);
126 paint.setStyle(SkPaint::kStroke_Style);
127 paint.setStrokeWidth(20);
128
129 canvas.drawCircle(50, 50, 39, paint);
130 canvas.flush();
131
132 fBitmap.extractAlpha(&fAlpha);
133 }
134
135 public:
136 SkBitmap fBitmap, fAlpha;
137
138 protected:
onShortName()139 SkString onShortName() override {
140 return SkString("extractalpha");
141 }
142
onISize()143 SkISize onISize() override {
144 return SkISize::Make(540, 330);
145 }
146
onDraw(SkCanvas * canvas)147 void onDraw(SkCanvas* canvas) override {
148 SkPaint paint;
149 paint.setAntiAlias(true);
150 paint.setFilterQuality(kLow_SkFilterQuality);
151 paint.setColor(SK_ColorRED);
152
153 canvas->drawBitmap(fBitmap, 10, 10, &paint); // should stay blue (ignore paint's color)
154 canvas->drawBitmap(fAlpha, 120, 10, &paint); // should draw red
155 }
156
157 private:
158 typedef skiagm::GM INHERITED;
159 };
160 DEF_GM( return new TestExtractAlphaGM; )
161
162