1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #include "gm.h"
9 #include "SkPath.h"
10 #include "SkRegion.h"
11 #include "SkShader.h"
12 #include "SkUtils.h"
13 #include "SkColorPriv.h"
14 #include "SkColorFilter.h"
15 #include "SkTypeface.h"
16
17 // effects
18 #include "SkGradientShader.h"
19 #include "SkBlurDrawLooper.h"
20
makebm(SkBitmap * bm,SkColorType ct,int w,int h)21 static void makebm(SkBitmap* bm, SkColorType ct, int w, int h) {
22 bm->allocPixels(SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType));
23 bm->eraseColor(SK_ColorTRANSPARENT);
24
25 SkCanvas canvas(*bm);
26 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(w), SkIntToScalar(h)} };
27 SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
28 SkScalar pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
29 SkPaint paint;
30
31 paint.setDither(true);
32 paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
33 SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode))->unref();
34 canvas.drawPaint(paint);
35 }
36
setup(SkPaint * paint,const SkBitmap & bm,bool filter,SkShader::TileMode tmx,SkShader::TileMode tmy)37 static void setup(SkPaint* paint, const SkBitmap& bm, bool filter,
38 SkShader::TileMode tmx, SkShader::TileMode tmy) {
39 SkShader* shader = SkShader::CreateBitmapShader(bm, tmx, tmy);
40 paint->setShader(shader)->unref();
41 paint->setFilterQuality(filter ? kLow_SkFilterQuality : kNone_SkFilterQuality);
42 }
43
44 static const SkColorType gColorTypes[] = {
45 kN32_SkColorType,
46 kRGB_565_SkColorType,
47 };
48
49 class TilingGM : public skiagm::GM {
50 public:
TilingGM(bool powerOfTwoSize)51 TilingGM(bool powerOfTwoSize)
52 : fPowerOfTwoSize(powerOfTwoSize) {
53 }
54
55 SkBitmap fTexture[SK_ARRAY_COUNT(gColorTypes)];
56
57 protected:
58
59 enum {
60 kPOTSize = 32,
61 kNPOTSize = 21,
62 };
63
onShortName()64 SkString onShortName() override {
65 SkString name("tilemodes");
66 if (!fPowerOfTwoSize) {
67 name.append("_npot");
68 }
69 return name;
70 }
71
onISize()72 SkISize onISize() override { return SkISize::Make(880, 560); }
73
onOnceBeforeDraw()74 void onOnceBeforeDraw() override {
75 int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
76 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
77 makebm(&fTexture[i], gColorTypes[i], size, size);
78 }
79 }
80
onDraw(SkCanvas * canvas)81 void onDraw(SkCanvas* canvas) override {
82
83 int size = fPowerOfTwoSize ? kPOTSize : kNPOTSize;
84
85 SkRect r = { 0, 0, SkIntToScalar(size*2), SkIntToScalar(size*2) };
86
87 static const char* gConfigNames[] = { "8888", "565", "4444" };
88
89 static const bool gFilters[] = { false, true };
90 static const char* gFilterNames[] = { "point", "bilinear" };
91
92 static const SkShader::TileMode gModes[] = { SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode };
93 static const char* gModeNames[] = { "C", "R", "M" };
94
95 SkScalar y = SkIntToScalar(24);
96 SkScalar x = SkIntToScalar(10);
97
98 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
99 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
100 SkPaint p;
101 SkString str;
102 p.setAntiAlias(true);
103 sk_tool_utils::set_portable_typeface(&p);
104 p.setDither(true);
105 str.printf("[%s,%s]", gModeNames[kx], gModeNames[ky]);
106
107 p.setTextAlign(SkPaint::kCenter_Align);
108 canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
109
110 x += r.width() * 4 / 3;
111 }
112 }
113
114 y += SkIntToScalar(16);
115
116 for (size_t i = 0; i < SK_ARRAY_COUNT(gColorTypes); i++) {
117 for (size_t j = 0; j < SK_ARRAY_COUNT(gFilters); j++) {
118 x = SkIntToScalar(10);
119 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
120 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
121 SkPaint paint;
122 #if 1 // Temporary change to regen bitmap before each draw. This may help tracking down an issue
123 // on SGX where resizing NPOT textures to POT textures exhibits a driver bug.
124 if (!fPowerOfTwoSize) {
125 makebm(&fTexture[i], gColorTypes[i], size, size);
126 }
127 #endif
128 setup(&paint, fTexture[i], gFilters[j], gModes[kx], gModes[ky]);
129 paint.setDither(true);
130
131 canvas->save();
132 canvas->translate(x, y);
133 canvas->drawRect(r, paint);
134 canvas->restore();
135
136 x += r.width() * 4 / 3;
137 }
138 }
139 {
140 SkPaint p;
141 SkString str;
142 p.setAntiAlias(true);
143 sk_tool_utils::set_portable_typeface(&p);
144 str.printf("%s, %s", gConfigNames[i], gFilterNames[j]);
145 canvas->drawText(str.c_str(), str.size(), x, y + r.height() * 2 / 3, p);
146 }
147
148 y += r.height() * 4 / 3;
149 }
150 }
151 }
152
153 private:
154 bool fPowerOfTwoSize;
155 typedef skiagm::GM INHERITED;
156 };
157
158 static const int gWidth = 32;
159 static const int gHeight = 32;
160
make_bm(SkShader::TileMode tx,SkShader::TileMode ty)161 static SkShader* make_bm(SkShader::TileMode tx, SkShader::TileMode ty) {
162 SkBitmap bm;
163 makebm(&bm, kN32_SkColorType, gWidth, gHeight);
164 return SkShader::CreateBitmapShader(bm, tx, ty);
165 }
166
make_grad(SkShader::TileMode tx,SkShader::TileMode ty)167 static SkShader* make_grad(SkShader::TileMode tx, SkShader::TileMode ty) {
168 SkPoint pts[] = { { 0, 0 }, { SkIntToScalar(gWidth), SkIntToScalar(gHeight)} };
169 SkPoint center = { SkIntToScalar(gWidth)/2, SkIntToScalar(gHeight)/2 };
170 SkScalar rad = SkIntToScalar(gWidth)/2;
171 SkColor colors[] = { 0xFFFF0000, 0xFF0044FF };
172
173 int index = (int)ty;
174 switch (index % 3) {
175 case 0:
176 return SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors), tx);
177 case 1:
178 return SkGradientShader::CreateRadial(center, rad, colors, NULL, SK_ARRAY_COUNT(colors), tx);
179 case 2:
180 return SkGradientShader::CreateSweep(center.fX, center.fY, colors, NULL, SK_ARRAY_COUNT(colors));
181 }
182
183 return NULL;
184 }
185
186 typedef SkShader* (*ShaderProc)(SkShader::TileMode, SkShader::TileMode);
187
188 class Tiling2GM : public skiagm::GM {
189 ShaderProc fProc;
190 SkString fName;
191 public:
Tiling2GM(ShaderProc proc,const char name[])192 Tiling2GM(ShaderProc proc, const char name[]) : fProc(proc) {
193 fName.printf("tilemode_%s", name);
194 }
195
196 protected:
197
onShortName()198 SkString onShortName() override {
199 return fName;
200 }
201
onISize()202 SkISize onISize() override { return SkISize::Make(880, 560); }
203
onDraw(SkCanvas * canvas)204 void onDraw(SkCanvas* canvas) override {
205 canvas->scale(SkIntToScalar(3)/2, SkIntToScalar(3)/2);
206
207 const SkScalar w = SkIntToScalar(gWidth);
208 const SkScalar h = SkIntToScalar(gHeight);
209 SkRect r = { -w, -h, w*2, h*2 };
210
211 static const SkShader::TileMode gModes[] = {
212 SkShader::kClamp_TileMode, SkShader::kRepeat_TileMode, SkShader::kMirror_TileMode
213 };
214 static const char* gModeNames[] = {
215 "Clamp", "Repeat", "Mirror"
216 };
217
218 SkScalar y = SkIntToScalar(24);
219 SkScalar x = SkIntToScalar(66);
220
221 SkPaint p;
222 p.setAntiAlias(true);
223 sk_tool_utils::set_portable_typeface(&p);
224 p.setTextAlign(SkPaint::kCenter_Align);
225
226 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
227 SkString str(gModeNames[kx]);
228 canvas->drawText(str.c_str(), str.size(), x + r.width()/2, y, p);
229 x += r.width() * 4 / 3;
230 }
231
232 y += SkIntToScalar(16) + h;
233 p.setTextAlign(SkPaint::kRight_Align);
234
235 for (size_t ky = 0; ky < SK_ARRAY_COUNT(gModes); ky++) {
236 x = SkIntToScalar(16) + w;
237
238 SkString str(gModeNames[ky]);
239 canvas->drawText(str.c_str(), str.size(), x, y + h/2, p);
240
241 x += SkIntToScalar(50);
242 for (size_t kx = 0; kx < SK_ARRAY_COUNT(gModes); kx++) {
243 SkPaint paint;
244 paint.setShader(fProc(gModes[kx], gModes[ky]))->unref();
245
246 canvas->save();
247 canvas->translate(x, y);
248 canvas->drawRect(r, paint);
249 canvas->restore();
250
251 x += r.width() * 4 / 3;
252 }
253 y += r.height() * 4 / 3;
254 }
255 }
256
257 private:
258 typedef skiagm::GM INHERITED;
259 };
260
261 //////////////////////////////////////////////////////////////////////////////
262
263 DEF_GM( return new TilingGM(true); )
264 DEF_GM( return new TilingGM(false); )
265 DEF_GM( return new Tiling2GM(make_bm, "bitmap"); )
266 DEF_GM( return new Tiling2GM(make_grad, "gradient"); )
267