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 "CanvasStateHelpers.h"
9 #include "SkCanvas.h"
10 #include "SkClipOpPriv.h"
11 #include "SkCanvasStateUtils.h"
12 #include "SkCommandLineFlags.h"
13 #include "SkDrawFilter.h"
14 #include "SkPaint.h"
15 #include "SkRegion.h"
16 #include "SkRRect.h"
17 #include "SkRect.h"
18 #include "SkTLazy.h"
19 #include "Test.h"
20
21 // dlopen and the library flag are only used for tests which require this flag.
22 #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
23 #include <dlfcn.h>
24
25 DEFINE_string(library, "", "Support library to use for CanvasState test. If empty (the default), "
26 "the test will be run without crossing a library boundary. Otherwise, "
27 "it is expected to be a full path to a shared library file, which will"
28 " be dynamically loaded. Functions from the library will be called to "
29 "test SkCanvasState. Instructions for generating the library are in "
30 "gyp/canvas_state_lib.gyp");
31
32
33 // This class calls dlopen on the library passed in to the command line flag library, and handles
34 // calling dlclose when it goes out of scope.
35 class OpenLibResult {
36 public:
37 // If the flag library was passed to this run of the test, attempt to open it using dlopen and
38 // report whether it succeeded.
OpenLibResult(skiatest::Reporter * reporter)39 OpenLibResult(skiatest::Reporter* reporter) {
40 if (FLAGS_library.count() == 1) {
41 fHandle = dlopen(FLAGS_library[0], RTLD_LAZY | RTLD_LOCAL);
42 REPORTER_ASSERT_MESSAGE(reporter, fHandle != nullptr, "Failed to open library!");
43 } else {
44 fHandle = nullptr;
45 }
46 }
47
48 // Automatically call dlclose when going out of scope.
~OpenLibResult()49 ~OpenLibResult() {
50 if (fHandle) {
51 dlclose(fHandle);
52 }
53 }
54
55 // Pointer to the shared library object.
handle()56 void* handle() { return fHandle; }
57
58 private:
59 void* fHandle;
60 };
61
DEF_TEST(CanvasState_test_complex_layers,reporter)62 DEF_TEST(CanvasState_test_complex_layers, reporter) {
63 const int WIDTH = 400;
64 const int HEIGHT = 400;
65 const int SPACER = 10;
66
67 SkRect rect = SkRect::MakeXYWH(SkIntToScalar(SPACER), SkIntToScalar(SPACER),
68 SkIntToScalar(WIDTH-(2*SPACER)),
69 SkIntToScalar((HEIGHT-(2*SPACER)) / 7));
70
71 const SkColorType colorTypes[] = {
72 kRGB_565_SkColorType, kN32_SkColorType
73 };
74
75 const int layerAlpha[] = { 255, 255, 0 };
76 const SkCanvas::SaveLayerFlags flags[] = {
77 static_cast<SkCanvas::SaveLayerFlags>(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag),
78 0,
79 static_cast<SkCanvas::SaveLayerFlags>(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag),
80 };
81 REPORTER_ASSERT(reporter, sizeof(layerAlpha) == sizeof(flags));
82
83 bool (*drawFn)(SkCanvasState* state, float l, float t,
84 float r, float b, int32_t s);
85
86 OpenLibResult openLibResult(reporter);
87 if (openLibResult.handle() != nullptr) {
88 *(void**) (&drawFn) = dlsym(openLibResult.handle(),
89 "complex_layers_draw_from_canvas_state");
90 } else {
91 drawFn = complex_layers_draw_from_canvas_state;
92 }
93
94 REPORTER_ASSERT(reporter, drawFn);
95 if (!drawFn) {
96 return;
97 }
98
99 for (size_t i = 0; i < SK_ARRAY_COUNT(colorTypes); ++i) {
100 SkBitmap bitmaps[2];
101 for (int j = 0; j < 2; ++j) {
102 bitmaps[j].allocPixels(SkImageInfo::Make(WIDTH, HEIGHT,
103 colorTypes[i],
104 kPremul_SkAlphaType));
105
106 SkCanvas canvas(bitmaps[j]);
107
108 canvas.drawColor(SK_ColorRED);
109
110 for (size_t k = 0; k < SK_ARRAY_COUNT(layerAlpha); ++k) {
111 SkTLazy<SkPaint> paint;
112 if (layerAlpha[k] != 0xFF) {
113 paint.init()->setAlpha(layerAlpha[k]);
114 }
115
116 // draw a rect within the layer's bounds and again outside the layer's bounds
117 canvas.saveLayer(SkCanvas::SaveLayerRec(&rect, paint.getMaybeNull(), flags[k]));
118
119 if (j) {
120 // Capture from the first Skia.
121 SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
122 REPORTER_ASSERT(reporter, state);
123
124 // And draw to it in the second Skia.
125 bool success = complex_layers_draw_from_canvas_state(state,
126 rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, SPACER);
127 REPORTER_ASSERT(reporter, success);
128
129 // And release it in the *first* Skia.
130 SkCanvasStateUtils::ReleaseCanvasState(state);
131 } else {
132 // Draw in the first Skia.
133 complex_layers_draw(&canvas, rect.fLeft, rect.fTop,
134 rect.fRight, rect.fBottom, SPACER);
135 }
136
137 canvas.restore();
138
139 // translate the canvas for the next iteration
140 canvas.translate(0, 2*(rect.height() + SPACER));
141 }
142 }
143
144 // now we memcmp the two bitmaps
145 REPORTER_ASSERT(reporter, bitmaps[0].getSize() == bitmaps[1].getSize());
146 REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
147 bitmaps[1].getPixels(),
148 bitmaps[0].getSize()));
149 }
150 }
151 #endif
152
153 ////////////////////////////////////////////////////////////////////////////////
154
155 #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
DEF_TEST(CanvasState_test_complex_clips,reporter)156 DEF_TEST(CanvasState_test_complex_clips, reporter) {
157 const int WIDTH = 400;
158 const int HEIGHT = 400;
159 const int SPACER = 10;
160
161 SkIRect layerRect = SkIRect::MakeWH(WIDTH, HEIGHT / 4);
162 layerRect.inset(2*SPACER, 2*SPACER);
163
164 SkIRect clipRect = layerRect;
165 clipRect.fRight = clipRect.fLeft + (clipRect.width() / 2) - (2*SPACER);
166 clipRect.outset(SPACER, SPACER);
167
168 SkIRect regionBounds = clipRect;
169 regionBounds.offset(clipRect.width() + (2*SPACER), 0);
170
171 SkIRect regionInterior = regionBounds;
172 regionInterior.inset(SPACER*3, SPACER*3);
173
174 SkRegion clipRegion;
175 clipRegion.setRect(regionBounds);
176 clipRegion.op(regionInterior, SkRegion::kDifference_Op);
177
178
179 const SkRegion::Op clipOps[] = { SkRegion::kIntersect_Op,
180 SkRegion::kIntersect_Op,
181 SkRegion::kReplace_Op,
182 };
183 const SkCanvas::SaveLayerFlags flags[] = {
184 static_cast<SkCanvas::SaveLayerFlags>(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag),
185 0,
186 static_cast<SkCanvas::SaveLayerFlags>(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag),
187 };
188 REPORTER_ASSERT(reporter, sizeof(clipOps) == sizeof(flags));
189
190 bool (*drawFn)(SkCanvasState* state, int32_t l, int32_t t,
191 int32_t r, int32_t b, int32_t clipOp,
192 int32_t regionRects, int32_t* rectCoords);
193
194 OpenLibResult openLibResult(reporter);
195 if (openLibResult.handle() != nullptr) {
196 *(void**) (&drawFn) = dlsym(openLibResult.handle(),
197 "complex_clips_draw_from_canvas_state");
198 } else {
199 drawFn = complex_clips_draw_from_canvas_state;
200 }
201
202 REPORTER_ASSERT(reporter, drawFn);
203 if (!drawFn) {
204 return;
205 }
206
207 SkBitmap bitmaps[2];
208 for (int i = 0; i < 2; ++i) {
209 bitmaps[i].allocN32Pixels(WIDTH, HEIGHT);
210
211 SkCanvas canvas(bitmaps[i]);
212
213 canvas.drawColor(SK_ColorRED);
214
215 SkRegion localRegion = clipRegion;
216
217 SkPaint paint;
218 paint.setAlpha(128);
219 for (size_t j = 0; j < SK_ARRAY_COUNT(flags); ++j) {
220 SkRect layerBounds = SkRect::Make(layerRect);
221 canvas.saveLayer(SkCanvas::SaveLayerRec(&layerBounds, &paint, flags[j]));
222
223 if (i) {
224 SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
225 REPORTER_ASSERT(reporter, state);
226
227 SkRegion::Iterator iter(localRegion);
228 SkTDArray<int32_t> rectCoords;
229 for (; !iter.done(); iter.next()) {
230 const SkIRect& rect = iter.rect();
231 *rectCoords.append() = rect.fLeft;
232 *rectCoords.append() = rect.fTop;
233 *rectCoords.append() = rect.fRight;
234 *rectCoords.append() = rect.fBottom;
235 }
236 bool success = drawFn(state, clipRect.fLeft, clipRect.fTop,
237 clipRect.fRight, clipRect.fBottom, clipOps[j],
238 rectCoords.count() / 4, rectCoords.begin());
239 REPORTER_ASSERT(reporter, success);
240
241 SkCanvasStateUtils::ReleaseCanvasState(state);
242 } else {
243 complex_clips_draw(&canvas, clipRect.fLeft, clipRect.fTop,
244 clipRect.fRight, clipRect.fBottom, clipOps[j],
245 localRegion);
246 }
247
248 canvas.restore();
249
250 // translate the canvas and region for the next iteration
251 canvas.translate(0, SkIntToScalar(2*(layerRect.height() + (SPACER))));
252 localRegion.translate(0, 2*(layerRect.height() + SPACER));
253 }
254 }
255
256 // now we memcmp the two bitmaps
257 REPORTER_ASSERT(reporter, bitmaps[0].getSize() == bitmaps[1].getSize());
258 REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
259 bitmaps[1].getPixels(),
260 bitmaps[0].getSize()));
261 }
262 #endif
263
264 ////////////////////////////////////////////////////////////////////////////////
265
266 #ifdef SK_SUPPORT_LEGACY_DRAWFILTER
267
268 class TestDrawFilter : public SkDrawFilter {
269 public:
filter(SkPaint *,Type)270 bool filter(SkPaint*, Type) override { return true; }
271 };
272
DEF_TEST(CanvasState_test_draw_filters,reporter)273 DEF_TEST(CanvasState_test_draw_filters, reporter) {
274 TestDrawFilter drawFilter;
275 SkBitmap bitmap;
276 bitmap.allocN32Pixels(10, 10);
277 SkCanvas canvas(bitmap);
278
279 canvas.setDrawFilter(&drawFilter);
280
281 SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
282 REPORTER_ASSERT(reporter, state);
283 std::unique_ptr<SkCanvas> tmpCanvas = SkCanvasStateUtils::MakeFromCanvasState(state);
284 REPORTER_ASSERT(reporter, tmpCanvas);
285
286 REPORTER_ASSERT(reporter, canvas.getDrawFilter());
287 REPORTER_ASSERT(reporter, nullptr == tmpCanvas->getDrawFilter());
288
289 SkCanvasStateUtils::ReleaseCanvasState(state);
290 }
291
292 #endif
293
294 ////////////////////////////////////////////////////////////////////////////////
295
DEF_TEST(CanvasState_test_soft_clips,reporter)296 DEF_TEST(CanvasState_test_soft_clips, reporter) {
297 SkBitmap bitmap;
298 bitmap.allocN32Pixels(10, 10);
299 SkCanvas canvas(bitmap);
300
301 SkRRect roundRect;
302 roundRect.setOval(SkRect::MakeWH(5, 5));
303
304 canvas.clipRRect(roundRect, kIntersect_SkClipOp, true);
305
306 SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
307 REPORTER_ASSERT(reporter, !state);
308 }
309
DEF_TEST(CanvasState_test_saveLayer_clip,reporter)310 DEF_TEST(CanvasState_test_saveLayer_clip, reporter) {
311 const uint32_t dontSaveFlag = 1 << 31; // secret flag for don't save
312 #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
313 static_assert(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag == dontSaveFlag, "");
314 #endif
315 const int WIDTH = 100;
316 const int HEIGHT = 100;
317 const int LAYER_WIDTH = 50;
318 const int LAYER_HEIGHT = 50;
319
320 SkBitmap bitmap;
321 bitmap.allocN32Pixels(WIDTH, HEIGHT);
322 SkCanvas canvas(bitmap);
323
324 SkRect bounds = SkRect::MakeWH(SkIntToScalar(LAYER_WIDTH), SkIntToScalar(LAYER_HEIGHT));
325 canvas.clipRect(SkRect::MakeWH(SkIntToScalar(WIDTH), SkIntToScalar(HEIGHT)));
326
327 SkIRect devClip;
328 // Check that saveLayer without the kClipToLayer_SaveFlag leaves the clip unchanged.
329 canvas.saveLayer(SkCanvas::SaveLayerRec(&bounds, nullptr, dontSaveFlag));
330 devClip = canvas.getDeviceClipBounds();
331 REPORTER_ASSERT(reporter, canvas.isClipRect());
332 REPORTER_ASSERT(reporter, devClip.width() == WIDTH);
333 REPORTER_ASSERT(reporter, devClip.height() == HEIGHT);
334 canvas.restore();
335
336 // Check that saveLayer with the kClipToLayer_SaveFlag sets the clip
337 // stack to the layer bounds.
338 canvas.saveLayer(&bounds, nullptr);
339 devClip = canvas.getDeviceClipBounds();
340 REPORTER_ASSERT(reporter, canvas.isClipRect());
341 REPORTER_ASSERT(reporter, devClip.width() == LAYER_WIDTH);
342 REPORTER_ASSERT(reporter, devClip.height() == LAYER_HEIGHT);
343 canvas.restore();
344 }
345