1 /*
2 * Copyright 2011 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 "SkCanvas.h"
9 #include "SkDrawLooper.h"
10 #include "SkTypes.h"
11 #include "Test.h"
12
13 /*
14 * Subclass of looper that just draws once, with an offset in X.
15 */
16 class TestLooper : public SkDrawLooper {
17 public:
18
createContext(SkCanvas *,void * storage) const19 SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const override {
20 return new (storage) TestDrawLooperContext;
21 }
22
contextSize() const23 size_t contextSize() const override { return sizeof(TestDrawLooperContext); }
24
25 #ifndef SK_IGNORE_TO_STRING
toString(SkString * str) const26 void toString(SkString* str) const override {
27 str->append("TestLooper:");
28 }
29 #endif
30
31 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(TestLooper);
32
33 private:
34 class TestDrawLooperContext : public SkDrawLooper::Context {
35 public:
TestDrawLooperContext()36 TestDrawLooperContext() : fOnce(true) {}
~TestDrawLooperContext()37 virtual ~TestDrawLooperContext() {}
38
next(SkCanvas * canvas,SkPaint *)39 bool next(SkCanvas* canvas, SkPaint*) override {
40 if (fOnce) {
41 fOnce = false;
42 canvas->translate(SkIntToScalar(10), 0);
43 return true;
44 }
45 return false;
46 }
47 private:
48 bool fOnce;
49 };
50 };
51
CreateProc(SkReadBuffer &)52 SkFlattenable* TestLooper::CreateProc(SkReadBuffer&) { return new TestLooper; }
53
test_drawBitmap(skiatest::Reporter * reporter)54 static void test_drawBitmap(skiatest::Reporter* reporter) {
55 SkBitmap src;
56 src.allocN32Pixels(10, 10);
57 src.eraseColor(SK_ColorWHITE);
58
59 SkBitmap dst;
60 dst.allocN32Pixels(10, 10);
61 dst.eraseColor(SK_ColorTRANSPARENT);
62
63 SkCanvas canvas(dst);
64 SkPaint paint;
65
66 // we are initially transparent
67 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
68
69 // we see the bitmap drawn
70 canvas.drawBitmap(src, 0, 0, &paint);
71 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5));
72
73 // reverify we are clear again
74 dst.eraseColor(SK_ColorTRANSPARENT);
75 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
76
77 // if the bitmap is clipped out, we don't draw it
78 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint);
79 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
80
81 // now install our looper, which will draw, since it internally translates
82 // to the left. The test is to ensure that canvas' quickReject machinary
83 // allows us through, even though sans-looper we would look like we should
84 // be clipped out.
85 paint.setLooper(new TestLooper)->unref();
86 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint);
87 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5));
88 }
89
test_layers(skiatest::Reporter * reporter)90 static void test_layers(skiatest::Reporter* reporter) {
91 SkCanvas canvas(100, 100);
92
93 SkRect r = SkRect::MakeWH(10, 10);
94 REPORTER_ASSERT(reporter, false == canvas.quickReject(r));
95
96 r.offset(300, 300);
97 REPORTER_ASSERT(reporter, true == canvas.quickReject(r));
98
99 // Test that saveLayer updates quickReject
100 SkRect bounds = SkRect::MakeLTRB(50, 50, 70, 70);
101 canvas.saveLayer(&bounds, nullptr);
102 REPORTER_ASSERT(reporter, true == canvas.quickReject(SkRect::MakeWH(10, 10)));
103 REPORTER_ASSERT(reporter, false == canvas.quickReject(SkRect::MakeWH(60, 60)));
104 }
105
DEF_TEST(QuickReject,reporter)106 DEF_TEST(QuickReject, reporter) {
107 test_drawBitmap(reporter);
108 test_layers(reporter);
109 }
110