1 /*
2 * Copyright 2015 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 "sk_tool_utils.h"
9 #include "SkSurface.h"
10 #include "Resources.h"
11 #include "gm.h"
12
13 #include "SkMath.h"
14 #include "SkColorPriv.h"
15
copy_bitmap(const SkBitmap & src,SkColorType colorType)16 static SkBitmap copy_bitmap(const SkBitmap& src, SkColorType colorType) {
17 SkBitmap copy;
18 src.copyTo(©, colorType);
19 copy.setImmutable();
20 return copy;
21 }
22
23 #define SCALE 128
24
25 // Make either A8 or gray8 bitmap.
make_bitmap(SkColorType ct)26 static SkBitmap make_bitmap(SkColorType ct) {
27 SkBitmap bm;
28 switch (ct) {
29 case kAlpha_8_SkColorType:
30 bm.allocPixels(SkImageInfo::MakeA8(SCALE, SCALE));
31 break;
32 case kGray_8_SkColorType:
33 bm.allocPixels(
34 SkImageInfo::Make(SCALE, SCALE, ct, kOpaque_SkAlphaType));
35 break;
36 default:
37 SkASSERT(false);
38 return bm;
39 }
40 SkAutoLockPixels autoLockPixels(bm);
41 uint8_t spectrum[256];
42 for (int y = 0; y < 256; ++y) {
43 spectrum[y] = y;
44 }
45 for (int y = 0; y < 128; ++y) {
46 // Shift over one byte each scanline.
47 memcpy(bm.getAddr8(0, y), &spectrum[y], 128);
48 }
49 bm.setImmutable();
50 return bm;
51 }
52
draw_center_letter(char c,SkPaint * p,SkColor color,SkScalar x,SkScalar y,SkCanvas * canvas)53 static void draw_center_letter(char c,
54 SkPaint* p,
55 SkColor color,
56 SkScalar x,
57 SkScalar y,
58 SkCanvas* canvas) {
59 SkRect bounds;
60 p->setColor(color);
61 p->measureText(&c, 1, &bounds);
62 canvas->drawText(&c, 1, x - bounds.centerX(), y - bounds.centerY(), *p);
63 }
64
color_wheel_native(SkCanvas * canvas)65 static void color_wheel_native(SkCanvas* canvas) {
66 SkAutoCanvasRestore autoCanvasRestore(canvas, true);
67 canvas->translate(0.5f * SCALE, 0.5f * SCALE);
68 SkPaint p;
69 p.setAntiAlias(false);
70 p.setColor(SK_ColorWHITE);
71 canvas->drawCircle(0.0f, 0.0f, SCALE * 0.5f, p);
72
73 const double sqrt_3_over_2 = 0.8660254037844387;
74 const SkScalar Z = 0.0f;
75 const SkScalar D = 0.3f * SkIntToScalar(SCALE);
76 const SkScalar X = SkDoubleToScalar(D * sqrt_3_over_2);
77 const SkScalar Y = D * SK_ScalarHalf;
78 sk_tool_utils::set_portable_typeface(&p, nullptr, SkTypeface::kBold);
79 p.setTextSize(0.28125f * SCALE);
80 draw_center_letter('K', &p, SK_ColorBLACK, Z, Z, canvas);
81 draw_center_letter('R', &p, SK_ColorRED, Z, D, canvas);
82 draw_center_letter('G', &p, SK_ColorGREEN, -X, -Y, canvas);
83 draw_center_letter('B', &p, SK_ColorBLUE, X, -Y, canvas);
84 draw_center_letter('C', &p, SK_ColorCYAN, Z, -D, canvas);
85 draw_center_letter('M', &p, SK_ColorMAGENTA, X, Y, canvas);
86 draw_center_letter('Y', &p, SK_ColorYELLOW, -X, Y, canvas);
87 }
88
89 template <typename T>
find(T * array,int N,T item)90 int find(T* array, int N, T item) {
91 for (int i = 0; i < N; ++i) {
92 if (array[i] == item) {
93 return i;
94 }
95 }
96 return -1;
97 }
98
premultiply_color(SkColor c)99 static SkPMColor premultiply_color(SkColor c) {
100 return SkPremultiplyARGBInline(SkColorGetA(c), SkColorGetR(c),
101 SkColorGetG(c), SkColorGetB(c));
102 }
103
indexed_bitmap()104 static SkBitmap indexed_bitmap() {
105 SkBitmap n32bitmap;
106 n32bitmap.allocN32Pixels(SCALE, SCALE);
107 n32bitmap.eraseColor(SK_ColorTRANSPARENT);
108
109 SkCanvas canvas(n32bitmap);
110 color_wheel_native(&canvas);
111 const SkColor colors[] = {
112 SK_ColorTRANSPARENT,
113 SK_ColorWHITE,
114 SK_ColorBLACK,
115 SK_ColorRED,
116 SK_ColorGREEN,
117 SK_ColorBLUE,
118 SK_ColorCYAN,
119 SK_ColorMAGENTA,
120 SK_ColorYELLOW,
121 };
122 SkPMColor pmColors[SK_ARRAY_COUNT(colors)];
123 for (size_t i = 0; i < SK_ARRAY_COUNT(colors); ++i) {
124 pmColors[i] = premultiply_color(colors[i]);
125 }
126 SkBitmap bm;
127 SkAutoTUnref<SkColorTable> ctable(new SkColorTable(pmColors, SK_ARRAY_COUNT(pmColors)));
128 SkImageInfo info = SkImageInfo::Make(SCALE, SCALE, kIndex_8_SkColorType,
129 kPremul_SkAlphaType);
130 bm.allocPixels(info, nullptr, ctable);
131 SkAutoLockPixels autoLockPixels1(n32bitmap);
132 SkAutoLockPixels autoLockPixels2(bm);
133 for (int y = 0; y < SCALE; ++y) {
134 for (int x = 0; x < SCALE; ++x) {
135 SkPMColor c = *n32bitmap.getAddr32(x, y);
136 int idx = find(pmColors, SK_ARRAY_COUNT(pmColors), c);
137 *bm.getAddr8(x, y) = SkClampMax(idx, SK_ARRAY_COUNT(pmColors) - 1);
138 }
139 }
140 return bm;
141 }
142
draw(SkCanvas * canvas,const SkPaint & p,const SkBitmap & src,SkColorType colorType,const char text[])143 static void draw(SkCanvas* canvas,
144 const SkPaint& p,
145 const SkBitmap& src,
146 SkColorType colorType,
147 const char text[]) {
148 SkASSERT(src.colorType() == colorType);
149 canvas->drawBitmap(src, 0.0f, 0.0f);
150 canvas->drawText(text, strlen(text), 0.0f, 12.0f, p);
151 }
152
153 DEF_SIMPLE_GM(all_bitmap_configs, canvas, SCALE, 6 * SCALE) {
154 SkAutoCanvasRestore autoCanvasRestore(canvas, true);
155 SkPaint p;
156 p.setColor(SK_ColorBLACK);
157 p.setAntiAlias(true);
158 sk_tool_utils::set_portable_typeface(&p, nullptr);
159
160 sk_tool_utils::draw_checkerboard(canvas, SK_ColorLTGRAY, SK_ColorWHITE, 8);
161
162 SkBitmap bitmap;
163 if (GetResourceAsBitmap("color_wheel.png", &bitmap)) {
164 bitmap.setImmutable();
165 draw(canvas, p, bitmap, kN32_SkColorType, "Native 32");
166
167 canvas->translate(0.0f, SkIntToScalar(SCALE));
168 SkBitmap copy565 = copy_bitmap(bitmap, kRGB_565_SkColorType);
169 p.setColor(SK_ColorRED);
170 draw(canvas, p, copy565, kRGB_565_SkColorType, "RGB 565");
171 p.setColor(SK_ColorBLACK);
172
173 canvas->translate(0.0f, SkIntToScalar(SCALE));
174 SkBitmap copy4444 = copy_bitmap(bitmap, kARGB_4444_SkColorType);
175 draw(canvas, p, copy4444, kARGB_4444_SkColorType, "ARGB 4444");
176 } else {
177 canvas->translate(0.0f, SkIntToScalar(2 * SCALE));
178 }
179
180 canvas->translate(0.0f, SkIntToScalar(SCALE));
181 SkBitmap bitmapIndexed = indexed_bitmap();
182 draw(canvas, p, bitmapIndexed, kIndex_8_SkColorType, "Index 8");
183
184 canvas->translate(0.0f, SkIntToScalar(SCALE));
185 SkBitmap bitmapA8 = make_bitmap(kAlpha_8_SkColorType);
186 draw(canvas, p, bitmapA8, kAlpha_8_SkColorType, "Alpha 8");
187
188 p.setColor(SK_ColorRED);
189 canvas->translate(0.0f, SkIntToScalar(SCALE));
190 SkBitmap bitmapG8 = make_bitmap(kGray_8_SkColorType);
191 draw(canvas, p, bitmapG8, kGray_8_SkColorType, "Gray 8");
192 }
193
194 // Works on Ganesh, fails on Raster.
make_not_native32_color_wheel()195 SkImage* make_not_native32_color_wheel() {
196 SkBitmap n32bitmap, notN32bitmap;
197 n32bitmap.allocN32Pixels(SCALE, SCALE);
198 n32bitmap.eraseColor(SK_ColorTRANSPARENT);
199 SkCanvas n32canvas(n32bitmap);
200 color_wheel_native(&n32canvas);
201 n32canvas.flush();
202 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A)
203 const SkColorType ct = kRGBA_8888_SkColorType;
204 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A)
205 const SkColorType ct = kBGRA_8888_SkColorType;
206 #endif
207 static_assert(ct != kN32_SkColorType, "BRGA!=RGBA");
208 SkAssertResult(n32bitmap.copyTo(¬N32bitmap, ct));
209 SkASSERT(notN32bitmap.colorType() == ct);
210 return SkImage::NewFromBitmap(notN32bitmap);
211 }
212
DEF_SIMPLE_GM(not_native32_bitmap_config,canvas,SCALE,SCALE)213 DEF_SIMPLE_GM(not_native32_bitmap_config, canvas, SCALE, SCALE) {
214 SkAutoTUnref<SkImage> notN32image(make_not_native32_color_wheel());
215 SkASSERT(notN32image);
216 sk_tool_utils::draw_checkerboard(canvas, SK_ColorLTGRAY, SK_ColorWHITE, 8);
217 canvas->drawImage(notN32image, 0.0f, 0.0f);
218 }
219