1 /*
2 * Copyright 2013 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 "include/core/SkBitmap.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkImageInfo.h"
12 #include "include/core/SkPaint.h"
13 #include "include/core/SkRRect.h"
14 #include "include/core/SkRect.h"
15 #include "include/core/SkRegion.h"
16 #include "include/core/SkScalar.h"
17 #include "include/core/SkSurface.h"
18 #include "include/core/SkTypes.h"
19 #include "include/private/SkTDArray.h"
20 #include "include/utils/SkCanvasStateUtils.h"
21 #include "src/core/SkCanvasPriv.h"
22 #include "src/core/SkTLazy.h"
23 #include "tests/Test.h"
24 #include "tools/flags/CommandLineFlags.h"
25
26 #include <cstring>
27
28 class SkCanvasState;
29
30 // Uncomment to include tests of CanvasState across a library boundary. This will change how 'dm'
31 // is built so that the functions defined in CanvasStateHelpers do not exist inside 'dm', and are
32 // instead compiled as part of the 'canvas_state_lib' build target. This produces a shared library
33 // that must be passed to 'dm' using the --library flag when running.
34 // #define SK_TEST_CANVAS_STATE_CROSS_LIBRARY
35
36 // Must be included after SK_TEST_CANVAS_STATE_CROSS_LIBRARY is defined
37 #include "tests/CanvasStateHelpers.h"
38
39 // dlopen, the library flag and canvas state helpers are only used for tests which require this flag
40 #if defined(SK_TEST_CANVAS_STATE_CROSS_LIBRARY)
41
42 static DEFINE_string(library, "",
43 "Support library to use for CanvasState test. Must be provided when"
44 " SK_TEST_CANVAS_STATE_CROSS_LIBRARY to specify the dynamically loaded library"
45 " that receives the captured canvas state. Functions from the library will be"
46 " called to test SkCanvasState. The library is built from the canvas_state_lib"
47 " target");
48
49 #include "src/ports/SkOSLibrary.h"
50
51 // Automatically loads library passed to --library flag and closes it when it goes out of scope.
52 class OpenLibResult {
53 public:
OpenLibResult(skiatest::Reporter * reporter)54 OpenLibResult(skiatest::Reporter* reporter) {
55 if (FLAGS_library.count() == 1) {
56 fLibrary = SkLoadDynamicLibrary(FLAGS_library[0]);
57 REPORTER_ASSERT(reporter, fLibrary != nullptr, "Failed to open library!");
58 } else {
59 fLibrary = nullptr;
60 }
61 }
62
~OpenLibResult()63 ~OpenLibResult() {
64 if (fLibrary) {
65 SkFreeDynamicLibrary(fLibrary);
66 }
67 }
68
69 // Load a function address from the library object, or null if the library had failed
procAddress(const char * funcName)70 void* procAddress(const char* funcName) {
71 if (fLibrary) {
72 return SkGetProcedureAddress(fLibrary, funcName);
73 }
74 return nullptr;
75 }
76
77 private:
78 void* fLibrary;
79 };
80
81 #endif
82
write_image(const SkImage * img,const char path[])83 static void write_image(const SkImage* img, const char path[]) {
84 auto data = img->encodeToData();
85 SkFILEWStream(path).write(data->data(), data->size());
86 }
87
compare(skiatest::Reporter * reporter,SkImage * img0,SkImage * img1)88 static void compare(skiatest::Reporter* reporter, SkImage* img0, SkImage* img1) {
89 if (false) {
90 static int counter;
91
92 SkDebugf("---- counter %d\n", counter);
93 SkString name;
94 name.printf("no_capture_%d.png", counter);
95 write_image(img0, name.c_str());
96 name.printf("capture_%d.png", counter);
97 write_image(img1, name.c_str());
98 counter++;
99 }
100
101 SkPixmap pm[2];
102 REPORTER_ASSERT(reporter, img0->peekPixels(&pm[0]));
103 REPORTER_ASSERT(reporter, img1->peekPixels(&pm[1]));
104 // now we memcmp the two bitmaps
105 REPORTER_ASSERT(reporter, pm[0].computeByteSize() == pm[1].computeByteSize());
106 REPORTER_ASSERT(reporter, pm[0].rowBytes() == (size_t)pm[0].width() * pm[0].info().bytesPerPixel());
107 REPORTER_ASSERT(reporter, pm[1].rowBytes() == (size_t)pm[1].width() * pm[1].info().bytesPerPixel());
108 if (memcmp(pm[0].addr(0, 0), pm[1].addr(0, 0), pm[0].computeByteSize()) != 0) {
109 REPORTER_ASSERT(reporter, false);
110 }
111 }
112
DEF_TEST(CanvasState_test_complex_layers,reporter)113 DEF_TEST(CanvasState_test_complex_layers, reporter) {
114 const int WIDTH = 400;
115 const int HEIGHT = 400;
116 const int SPACER = 10;
117
118 SkRect rect = SkRect::MakeXYWH(SkIntToScalar(SPACER), SkIntToScalar(SPACER),
119 SkIntToScalar(WIDTH-(2*SPACER)),
120 SkIntToScalar((HEIGHT-(2*SPACER)) / 7));
121
122 const SkColorType colorTypes[] = {
123 kRGB_565_SkColorType, kN32_SkColorType
124 };
125
126 const int layerAlpha[] = { 255, 255, 0 };
127
128 bool (*drawFn)(SkCanvasState* state, float l, float t,
129 float r, float b, int32_t s);
130
131 #if defined(SK_TEST_CANVAS_STATE_CROSS_LIBRARY)
132 OpenLibResult openLibResult(reporter);
133 *(void**) (&drawFn) = openLibResult.procAddress("complex_layers_draw_from_canvas_state");
134 #else
135 drawFn = complex_layers_draw_from_canvas_state;
136 #endif
137
138 REPORTER_ASSERT(reporter, drawFn);
139 if (!drawFn) {
140 return;
141 }
142
143 for (size_t i = 0; i < SK_ARRAY_COUNT(colorTypes); ++i) {
144 sk_sp<SkImage> images[2];
145 for (int j = 0; j < 2; ++j) {
146 auto surf = SkSurface::MakeRaster(SkImageInfo::Make(WIDTH, HEIGHT,
147 colorTypes[i],
148 kPremul_SkAlphaType));
149 SkCanvas* canvas = surf->getCanvas();
150
151 canvas->drawColor(SK_ColorRED);
152
153 for (size_t k = 0; k < SK_ARRAY_COUNT(layerAlpha); ++k) {
154 SkTLazy<SkPaint> paint;
155 if (layerAlpha[k] != 0xFF) {
156 paint.init()->setAlpha(layerAlpha[k]);
157 }
158
159 // draw a rect within the layer's bounds and again outside the layer's bounds
160 canvas->saveLayer(SkCanvas::SaveLayerRec(&rect, paint.getMaybeNull()));
161
162 if (j) {
163 // Capture from the first Skia.
164 SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(canvas);
165 REPORTER_ASSERT(reporter, state);
166
167 // And draw to it in the second Skia.
168 bool success = complex_layers_draw_from_canvas_state(state,
169 rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, SPACER);
170 REPORTER_ASSERT(reporter, success);
171
172 // And release it in the *first* Skia.
173 SkCanvasStateUtils::ReleaseCanvasState(state);
174 } else {
175 // Draw in the first Skia.
176 complex_layers_draw(canvas, rect.fLeft, rect.fTop,
177 rect.fRight, rect.fBottom, SPACER);
178 }
179
180 canvas->restore();
181
182 // translate the canvas for the next iteration
183 canvas->translate(0, 2*(rect.height() + SPACER));
184 }
185 images[j] = surf->makeImageSnapshot();
186 }
187
188 compare(reporter, images[0].get(), images[1].get());
189 }
190 }
191
192 ////////////////////////////////////////////////////////////////////////////////
193
DEF_TEST(CanvasState_test_complex_clips,reporter)194 DEF_TEST(CanvasState_test_complex_clips, reporter) {
195 const int WIDTH = 400;
196 const int HEIGHT = 400;
197 const int SPACER = 10;
198
199 SkIRect layerRect = SkIRect::MakeWH(WIDTH, HEIGHT / 4);
200 layerRect.inset(2*SPACER, 2*SPACER);
201
202 SkIRect clipRect = layerRect;
203 clipRect.fRight = clipRect.fLeft + (clipRect.width() / 2) - (2*SPACER);
204 clipRect.outset(SPACER, SPACER);
205
206 SkIRect regionBounds = clipRect;
207 regionBounds.offset(clipRect.width() + (2*SPACER), 0);
208
209 SkIRect regionInterior = regionBounds;
210 regionInterior.inset(SPACER*3, SPACER*3);
211
212 SkRegion clipRegion;
213 clipRegion.setRect(regionBounds);
214 clipRegion.op(regionInterior, SkRegion::kDifference_Op);
215
216
217 const SkRegion::Op clipOps[] = { SkRegion::kIntersect_Op,
218 SkRegion::kIntersect_Op,
219 SkRegion::kDifference_Op,
220 };
221
222 bool (*drawFn)(SkCanvasState* state, int32_t l, int32_t t,
223 int32_t r, int32_t b, int32_t clipOp,
224 int32_t regionRects, int32_t* rectCoords);
225
226 #if defined(SK_TEST_CANVAS_STATE_CROSS_LIBRARY)
227 OpenLibResult openLibResult(reporter);
228 *(void**) (&drawFn) = openLibResult.procAddress("complex_clips_draw_from_canvas_state");
229 #else
230 drawFn = complex_clips_draw_from_canvas_state;
231 #endif
232
233 REPORTER_ASSERT(reporter, drawFn);
234 if (!drawFn) {
235 return;
236 }
237
238 sk_sp<SkImage> images[2];
239 for (int i = 0; i < 2; ++i) {
240 auto surf = SkSurface::MakeRaster(SkImageInfo::MakeN32Premul(WIDTH, HEIGHT));
241 SkCanvas* canvas = surf->getCanvas();
242
243 canvas->drawColor(SK_ColorRED);
244
245 SkRegion localRegion = clipRegion;
246
247 SkPaint paint;
248 paint.setAlpha(128);
249 for (size_t j = 0; j < SK_ARRAY_COUNT(clipOps); ++j) {
250 SkRect layerBounds = SkRect::Make(layerRect);
251 canvas->saveLayer(SkCanvas::SaveLayerRec(&layerBounds, &paint));
252
253 if (i) {
254 SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(canvas);
255 REPORTER_ASSERT(reporter, state);
256
257 SkRegion::Iterator iter(localRegion);
258 SkTDArray<int32_t> rectCoords;
259 for (; !iter.done(); iter.next()) {
260 const SkIRect& rect = iter.rect();
261 *rectCoords.append() = rect.fLeft;
262 *rectCoords.append() = rect.fTop;
263 *rectCoords.append() = rect.fRight;
264 *rectCoords.append() = rect.fBottom;
265 }
266 bool success = drawFn(state, clipRect.fLeft, clipRect.fTop,
267 clipRect.fRight, clipRect.fBottom, clipOps[j],
268 rectCoords.count() / 4, rectCoords.begin());
269 REPORTER_ASSERT(reporter, success);
270
271 SkCanvasStateUtils::ReleaseCanvasState(state);
272 } else {
273 complex_clips_draw(canvas, clipRect.fLeft, clipRect.fTop,
274 clipRect.fRight, clipRect.fBottom, clipOps[j],
275 localRegion);
276 }
277
278 canvas->restore();
279
280 // translate the canvas and region for the next iteration
281 canvas->translate(0, SkIntToScalar(2*(layerRect.height() + (SPACER))));
282 localRegion.translate(0, 2*(layerRect.height() + SPACER));
283 }
284 images[i] = surf->makeImageSnapshot();
285 }
286
287 compare(reporter, images[0].get(), images[1].get());
288 }
289
290 ////////////////////////////////////////////////////////////////////////////////
291
DEF_TEST(CanvasState_test_soft_clips,reporter)292 DEF_TEST(CanvasState_test_soft_clips, reporter) {
293 SkBitmap bitmap;
294 bitmap.allocN32Pixels(10, 10);
295 SkCanvas canvas(bitmap);
296
297 SkRRect roundRect;
298 roundRect.setOval(SkRect::MakeWH(5, 5));
299
300 canvas.clipRRect(roundRect, SkClipOp::kIntersect, true);
301
302 SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
303 REPORTER_ASSERT(reporter, !state);
304 }
305
DEF_TEST(CanvasState_test_saveLayer_clip,reporter)306 DEF_TEST(CanvasState_test_saveLayer_clip, reporter) {
307 const int WIDTH = 100;
308 const int HEIGHT = 100;
309 const int LAYER_WIDTH = 50;
310 const int LAYER_HEIGHT = 50;
311
312 SkBitmap bitmap;
313 bitmap.allocN32Pixels(WIDTH, HEIGHT);
314 SkCanvas canvas(bitmap);
315
316 SkRect bounds = SkRect::MakeWH(SkIntToScalar(LAYER_WIDTH), SkIntToScalar(LAYER_HEIGHT));
317 canvas.clipRect(SkRect::MakeWH(SkIntToScalar(WIDTH), SkIntToScalar(HEIGHT)));
318
319 // Check that saveLayer sets the clip stack to the layer bounds.
320 canvas.saveLayer(&bounds, nullptr);
321 SkIRect devClip = canvas.getDeviceClipBounds();
322 REPORTER_ASSERT(reporter, canvas.isClipRect());
323 REPORTER_ASSERT(reporter, devClip.width() == LAYER_WIDTH);
324 REPORTER_ASSERT(reporter, devClip.height() == LAYER_HEIGHT);
325 canvas.restore();
326 }
327