ClipAreaTests.cpp revision 82457c51176855b9be0b441010870093a6feb414 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <gtest/gtest.h>
18#include <SkPath.h>
19#include <SkRegion.h>
20
21#include "ClipArea.h"
22
23#include "Matrix.h"
24#include "Rect.h"
25#include "utils/LinearAllocator.h"
26
27namespace android {
28namespace uirenderer {
29
30static Rect kViewportBounds(2048, 2048);
31
32static ClipArea createClipArea() {
33    ClipArea area;
34    area.setViewportDimensions(kViewportBounds.getWidth(), kViewportBounds.getHeight());
35    return area;
36}
37
38TEST(TransformedRectangle, basics) {
39    Rect r(0, 0, 100, 100);
40    Matrix4 minus90;
41    minus90.loadRotate(-90);
42    minus90.mapRect(r);
43    Rect r2(20, 40, 120, 60);
44
45    Matrix4 m90;
46    m90.loadRotate(90);
47    TransformedRectangle tr(r, m90);
48    EXPECT_TRUE(tr.canSimplyIntersectWith(tr));
49
50    Matrix4 m0;
51    TransformedRectangle tr0(r2, m0);
52    EXPECT_FALSE(tr.canSimplyIntersectWith(tr0));
53
54    Matrix4 m45;
55    m45.loadRotate(45);
56    TransformedRectangle tr2(r, m45);
57    EXPECT_FALSE(tr2.canSimplyIntersectWith(tr));
58}
59
60TEST(RectangleList, basics) {
61    RectangleList list;
62    EXPECT_TRUE(list.isEmpty());
63
64    Rect r(0, 0, 100, 100);
65    Matrix4 m45;
66    m45.loadRotate(45);
67    list.set(r, m45);
68    EXPECT_FALSE(list.isEmpty());
69
70    Rect r2(20, 20, 200, 200);
71    list.intersectWith(r2, m45);
72    EXPECT_FALSE(list.isEmpty());
73    EXPECT_EQ(1, list.getTransformedRectanglesCount());
74
75    Rect r3(20, 20, 200, 200);
76    Matrix4 m30;
77    m30.loadRotate(30);
78    list.intersectWith(r2, m30);
79    EXPECT_FALSE(list.isEmpty());
80    EXPECT_EQ(2, list.getTransformedRectanglesCount());
81
82    SkRegion clip;
83    clip.setRect(0, 0, 2000, 2000);
84    SkRegion rgn(list.convertToRegion(clip));
85    EXPECT_FALSE(rgn.isEmpty());
86}
87
88TEST(ClipArea, basics) {
89    ClipArea area(createClipArea());
90    EXPECT_FALSE(area.isEmpty());
91}
92
93TEST(ClipArea, paths) {
94    ClipArea area(createClipArea());
95    SkPath path;
96    SkScalar r = 100;
97    path.addCircle(r, r, r);
98    area.clipPathWithTransform(path, &Matrix4::identity(), SkRegion::kIntersect_Op);
99    EXPECT_FALSE(area.isEmpty());
100    EXPECT_FALSE(area.isSimple());
101    EXPECT_FALSE(area.isRectangleList());
102
103    Rect clipRect(area.getClipRect());
104    Rect expected(0, 0, r * 2, r * 2);
105    EXPECT_EQ(expected, clipRect);
106    SkRegion clipRegion(area.getClipRegion());
107    auto skRect(clipRegion.getBounds());
108    Rect regionBounds;
109    regionBounds.set(skRect);
110    EXPECT_EQ(expected, regionBounds);
111}
112
113TEST(ClipArea, replaceNegative) {
114    ClipArea area(createClipArea());
115    area.setClip(0, 0, 100, 100);
116
117    Rect expected(-50, -50, 50, 50);
118    area.clipRectWithTransform(expected, &Matrix4::identity(), SkRegion::kReplace_Op);
119    EXPECT_EQ(expected, area.getClipRect());
120}
121
122TEST(ClipArea, serializeClip) {
123    ClipArea area(createClipArea());
124    LinearAllocator allocator;
125
126    // unset clip
127    EXPECT_EQ(nullptr, area.serializeClip(allocator));
128
129    // rect clip
130    area.setClip(0, 0, 200, 200);
131    {
132        auto serializedClip = area.serializeClip(allocator);
133        ASSERT_NE(nullptr, serializedClip);
134        ASSERT_EQ(ClipMode::Rectangle, serializedClip->mode);
135        ASSERT_FALSE(serializedClip->intersectWithRoot) << "No replace, so no intersectWithRoot";
136        EXPECT_EQ(Rect(200, 200), serializedClip->rect);
137        EXPECT_EQ(serializedClip, area.serializeClip(allocator))
138                << "Requery of clip on unmodified ClipArea must return same pointer.";
139    }
140
141    // rect list
142    Matrix4 rotate;
143    rotate.loadRotate(5.0f);
144    area.clipRectWithTransform(Rect(50, 50, 150, 150), &rotate, SkRegion::kIntersect_Op);
145    {
146        auto serializedClip = area.serializeClip(allocator);
147        ASSERT_NE(nullptr, serializedClip);
148        ASSERT_EQ(ClipMode::RectangleList, serializedClip->mode);
149        ASSERT_FALSE(serializedClip->intersectWithRoot) << "No replace, so no intersectWithRoot";
150        auto clipRectList = reinterpret_cast<const ClipRectList*>(serializedClip);
151        EXPECT_EQ(2, clipRectList->rectList.getTransformedRectanglesCount());
152        EXPECT_EQ(Rect(37, 54, 145, 163), clipRectList->rect);
153        EXPECT_EQ(serializedClip, area.serializeClip(allocator))
154                << "Requery of clip on unmodified ClipArea must return same pointer.";
155    }
156
157    // region
158    SkPath circlePath;
159    circlePath.addCircle(100, 100, 100);
160    area.clipPathWithTransform(circlePath, &Matrix4::identity(), SkRegion::kReplace_Op);
161    {
162        auto serializedClip = area.serializeClip(allocator);
163        ASSERT_NE(nullptr, serializedClip);
164        ASSERT_EQ(ClipMode::Region, serializedClip->mode);
165        ASSERT_TRUE(serializedClip->intersectWithRoot) << "Replace op, so expect intersectWithRoot";
166        auto clipRegion = reinterpret_cast<const ClipRegion*>(serializedClip);
167        EXPECT_EQ(SkIRect::MakeWH(200, 200), clipRegion->region.getBounds())
168                << "Clip region should be 200x200";
169        EXPECT_EQ(Rect(200, 200), clipRegion->rect);
170        EXPECT_EQ(serializedClip, area.serializeClip(allocator))
171                << "Requery of clip on unmodified ClipArea must return same pointer.";
172    }
173}
174
175TEST(ClipArea, serializeClip_pathIntersectWithRoot) {
176    ClipArea area(createClipArea());
177    LinearAllocator allocator;
178    SkPath circlePath;
179    circlePath.addCircle(100, 100, 100);
180    area.clipPathWithTransform(circlePath, &Matrix4::identity(), SkRegion::kIntersect_Op);
181
182    auto serializedClip = area.serializeClip(allocator);
183    ASSERT_NE(nullptr, serializedClip);
184    EXPECT_FALSE(serializedClip->intersectWithRoot) << "No replace, so no intersectWithRoot";
185}
186
187TEST(ClipArea, serializeIntersectedClip) {
188    ClipArea area(createClipArea());
189    LinearAllocator allocator;
190
191    // simple state;
192    EXPECT_EQ(nullptr, area.serializeIntersectedClip(allocator, nullptr, Matrix4::identity()));
193    area.setClip(0, 0, 200, 200);
194    {
195        auto origRectClip = area.serializeClip(allocator);
196        ASSERT_NE(nullptr, origRectClip);
197        EXPECT_EQ(origRectClip, area.serializeIntersectedClip(allocator, nullptr, Matrix4::identity()));
198    }
199
200    // rect
201    {
202        ClipRect recordedClip(Rect(100, 100));
203        Matrix4 translateScale;
204        translateScale.loadTranslate(100, 100, 0);
205        translateScale.scale(2, 3, 1);
206        auto resolvedClip = area.serializeIntersectedClip(allocator, &recordedClip, translateScale);
207        ASSERT_NE(nullptr, resolvedClip);
208        ASSERT_EQ(ClipMode::Rectangle, resolvedClip->mode);
209        EXPECT_EQ(Rect(100, 100, 200, 200), resolvedClip->rect);
210
211        EXPECT_EQ(resolvedClip, area.serializeIntersectedClip(allocator, &recordedClip, translateScale))
212                << "Must return previous serialization, since input is same";
213
214        ClipRect recordedClip2(Rect(100, 100));
215        EXPECT_NE(resolvedClip, area.serializeIntersectedClip(allocator, &recordedClip2, translateScale))
216                << "Shouldn't return previous serialization, since matrix location is different";
217    }
218
219    // rect list
220    Matrix4 rotate;
221    rotate.loadRotate(2.0f);
222    area.clipRectWithTransform(Rect(200, 200), &rotate, SkRegion::kIntersect_Op);
223    {
224        ClipRect recordedClip(Rect(100, 100));
225        auto resolvedClip = area.serializeIntersectedClip(allocator, &recordedClip, Matrix4::identity());
226        ASSERT_NE(nullptr, resolvedClip);
227        ASSERT_EQ(ClipMode::RectangleList, resolvedClip->mode);
228        auto clipRectList = reinterpret_cast<const ClipRectList*>(resolvedClip);
229        EXPECT_EQ(2, clipRectList->rectList.getTransformedRectanglesCount());
230    }
231
232    // region
233    SkPath circlePath;
234    circlePath.addCircle(100, 100, 100);
235    area.clipPathWithTransform(circlePath, &Matrix4::identity(), SkRegion::kReplace_Op);
236    {
237        SkPath ovalPath;
238        ovalPath.addOval(SkRect::MakeLTRB(50, 0, 150, 200));
239
240        ClipRegion recordedClip;
241        recordedClip.region.setPath(ovalPath, SkRegion(SkIRect::MakeWH(200, 200)));
242        recordedClip.rect = Rect(200, 200);
243
244        Matrix4 translate10x20;
245        translate10x20.loadTranslate(10, 20, 0);
246        auto resolvedClip = area.serializeIntersectedClip(allocator, &recordedClip,
247                translate10x20); // Note: only translate for now, others not handled correctly
248        ASSERT_NE(nullptr, resolvedClip);
249        ASSERT_EQ(ClipMode::Region, resolvedClip->mode);
250        auto clipRegion = reinterpret_cast<const ClipRegion*>(resolvedClip);
251        EXPECT_EQ(SkIRect::MakeLTRB(60, 20, 160, 200), clipRegion->region.getBounds());
252    }
253}
254
255TEST(ClipArea, serializeIntersectedClip_snap) {
256    ClipArea area(createClipArea());
257    area.setClip(100.2, 100.4, 500.6, 500.8);
258    LinearAllocator allocator;
259
260    {
261        // no recorded clip case
262        auto resolvedClip = area.serializeIntersectedClip(allocator, nullptr, Matrix4::identity());
263        EXPECT_EQ(Rect(100, 100, 501, 501), resolvedClip->rect);
264    }
265    {
266        // recorded clip case
267        ClipRect recordedClip(Rect(100.12, 100.74));
268        Matrix4 translateScale;
269        translateScale.loadTranslate(100, 100, 0);
270        translateScale.scale(2, 3, 1); // recorded clip will have non-int coords, even after transform
271        auto resolvedClip = area.serializeIntersectedClip(allocator, &recordedClip, translateScale);
272        ASSERT_NE(nullptr, resolvedClip);
273        EXPECT_EQ(ClipMode::Rectangle, resolvedClip->mode);
274        EXPECT_EQ(Rect(100, 100, 300, 402), resolvedClip->rect);
275    }
276}
277
278TEST(ClipArea, serializeIntersectedClip_scale) {
279    ClipArea area(createClipArea());
280    area.setClip(0, 0, 400, 400);
281    LinearAllocator allocator;
282
283    SkPath circlePath;
284    circlePath.addCircle(50, 50, 50);
285
286    ClipRegion recordedClip;
287    recordedClip.region.setPath(circlePath, SkRegion(SkIRect::MakeWH(100, 100)));
288    recordedClip.rect = Rect(100, 100);
289
290    Matrix4 translateScale;
291    translateScale.loadTranslate(100, 100, 0);
292    translateScale.scale(2, 2, 1);
293    auto resolvedClip = area.serializeIntersectedClip(allocator, &recordedClip, translateScale);
294
295    ASSERT_NE(nullptr, resolvedClip);
296    EXPECT_EQ(ClipMode::Region, resolvedClip->mode);
297    EXPECT_EQ(Rect(100, 100, 300, 300), resolvedClip->rect);
298    auto clipRegion = reinterpret_cast<const ClipRegion*>(resolvedClip);
299    EXPECT_EQ(SkIRect::MakeLTRB(100, 100, 300, 300), clipRegion->region.getBounds());
300}
301
302TEST(ClipArea, applyTransformToRegion_identity) {
303    SkRegion region(SkIRect::MakeLTRB(1, 2, 3, 4));
304    ClipArea::applyTransformToRegion(Matrix4::identity(), &region);
305    EXPECT_TRUE(region.isRect());
306    EXPECT_EQ(SkIRect::MakeLTRB(1, 2, 3, 4), region.getBounds());
307}
308
309TEST(ClipArea, applyTransformToRegion_translate) {
310    SkRegion region(SkIRect::MakeLTRB(1, 2, 3, 4));
311    Matrix4 transform;
312    transform.loadTranslate(10, 20, 0);
313    ClipArea::applyTransformToRegion(transform, &region);
314    EXPECT_TRUE(region.isRect());
315    EXPECT_EQ(SkIRect::MakeLTRB(11, 22, 13, 24), region.getBounds());
316}
317
318TEST(ClipArea, applyTransformToRegion_scale) {
319    SkRegion region(SkIRect::MakeLTRB(1, 2, 3, 4));
320    Matrix4 transform;
321    transform.loadScale(2, 3, 1);
322    ClipArea::applyTransformToRegion(transform, &region);
323    EXPECT_TRUE(region.isRect());
324    EXPECT_EQ(SkIRect::MakeLTRB(2, 6, 6, 12), region.getBounds());
325}
326
327TEST(ClipArea, applyTransformToRegion_translateScale) {
328    SkRegion region(SkIRect::MakeLTRB(1, 2, 3, 4));
329    Matrix4 transform;
330    transform.translate(10, 20);
331    transform.scale(2, 3, 1);
332    ClipArea::applyTransformToRegion(transform, &region);
333    EXPECT_TRUE(region.isRect());
334    EXPECT_EQ(SkIRect::MakeLTRB(12, 26, 16, 32), region.getBounds());
335}
336
337} // namespace uirenderer
338} // namespace android
339