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 "SkArenaAlloc.h" 9 #include "SkCanvas.h" 10 #include "SkColorSpaceXformer.h" 11 #include "SkDrawLooper.h" 12 #include "SkLightingImageFilter.h" 13 #include "SkTypes.h" 14 #include "Test.h" 15 16 /* 17 * Subclass of looper that just draws once, with an offset in X. 18 */ 19 class TestLooper : public SkDrawLooper { 20 public: 21 22 SkDrawLooper::Context* makeContext(SkCanvas*, SkArenaAlloc* alloc) const override { 23 return alloc->make<TestDrawLooperContext>(); 24 } 25 26 sk_sp<SkDrawLooper> onMakeColorSpace(SkColorSpaceXformer*) const override { 27 return nullptr; 28 } 29 30 #ifndef SK_IGNORE_TO_STRING 31 void toString(SkString* str) const override { 32 str->append("TestLooper:"); 33 } 34 #endif 35 36 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(TestLooper) 37 38 private: 39 class TestDrawLooperContext : public SkDrawLooper::Context { 40 public: 41 TestDrawLooperContext() : fOnce(true) {} 42 ~TestDrawLooperContext() override {} 43 44 bool next(SkCanvas* canvas, SkPaint*) override { 45 if (fOnce) { 46 fOnce = false; 47 canvas->translate(SkIntToScalar(10), 0); 48 return true; 49 } 50 return false; 51 } 52 53 private: 54 bool fOnce; 55 }; 56 }; 57 58 sk_sp<SkFlattenable> TestLooper::CreateProc(SkReadBuffer&) { return sk_make_sp<TestLooper>(); } 59 60 static void test_drawBitmap(skiatest::Reporter* reporter) { 61 SkBitmap src; 62 src.allocN32Pixels(10, 10); 63 src.eraseColor(SK_ColorWHITE); 64 65 SkBitmap dst; 66 dst.allocN32Pixels(10, 10); 67 dst.eraseColor(SK_ColorTRANSPARENT); 68 69 SkCanvas canvas(dst); 70 SkPaint paint; 71 72 // we are initially transparent 73 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 74 75 // we see the bitmap drawn 76 canvas.drawBitmap(src, 0, 0, &paint); 77 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); 78 79 // reverify we are clear again 80 dst.eraseColor(SK_ColorTRANSPARENT); 81 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 82 83 // if the bitmap is clipped out, we don't draw it 84 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); 85 REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5)); 86 87 // now install our looper, which will draw, since it internally translates 88 // to the left. The test is to ensure that canvas' quickReject machinary 89 // allows us through, even though sans-looper we would look like we should 90 // be clipped out. 91 paint.setLooper(sk_make_sp<TestLooper>()); 92 canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint); 93 REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5)); 94 } 95 96 static void test_layers(skiatest::Reporter* reporter) { 97 SkCanvas canvas(100, 100); 98 99 SkRect r = SkRect::MakeWH(10, 10); 100 REPORTER_ASSERT(reporter, false == canvas.quickReject(r)); 101 102 r.offset(300, 300); 103 REPORTER_ASSERT(reporter, true == canvas.quickReject(r)); 104 105 // Test that saveLayer updates quickReject 106 SkRect bounds = SkRect::MakeLTRB(50, 50, 70, 70); 107 canvas.saveLayer(&bounds, nullptr); 108 REPORTER_ASSERT(reporter, true == canvas.quickReject(SkRect::MakeWH(10, 10))); 109 REPORTER_ASSERT(reporter, false == canvas.quickReject(SkRect::MakeWH(60, 60))); 110 } 111 112 static void test_quick_reject(skiatest::Reporter* reporter) { 113 SkCanvas canvas(100, 100); 114 SkRect r0 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f); 115 SkRect r1 = SkRect::MakeLTRB(-50.0f, 110.0f, 50.0f, 120.0f); 116 SkRect r2 = SkRect::MakeLTRB(110.0f, -50.0f, 120.0f, 50.0f); 117 SkRect r3 = SkRect::MakeLTRB(-120.0f, -50.0f, 120.0f, 50.0f); 118 SkRect r4 = SkRect::MakeLTRB(-50.0f, -120.0f, 50.0f, 120.0f); 119 SkRect r5 = SkRect::MakeLTRB(-120.0f, -120.0f, 120.0f, 120.0f); 120 SkRect r6 = SkRect::MakeLTRB(-120.0f, -120.0f, -110.0f, -110.0f); 121 SkRect r7 = SkRect::MakeLTRB(SK_ScalarNaN, -50.0f, 50.0f, 50.0f); 122 SkRect r8 = SkRect::MakeLTRB(-50.0f, SK_ScalarNaN, 50.0f, 50.0f); 123 SkRect r9 = SkRect::MakeLTRB(-50.0f, -50.0f, SK_ScalarNaN, 50.0f); 124 SkRect r10 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, SK_ScalarNaN); 125 REPORTER_ASSERT(reporter, false == canvas.quickReject(r0)); 126 REPORTER_ASSERT(reporter, true == canvas.quickReject(r1)); 127 REPORTER_ASSERT(reporter, true == canvas.quickReject(r2)); 128 REPORTER_ASSERT(reporter, false == canvas.quickReject(r3)); 129 REPORTER_ASSERT(reporter, false == canvas.quickReject(r4)); 130 REPORTER_ASSERT(reporter, false == canvas.quickReject(r5)); 131 REPORTER_ASSERT(reporter, true == canvas.quickReject(r6)); 132 REPORTER_ASSERT(reporter, true == canvas.quickReject(r7)); 133 REPORTER_ASSERT(reporter, true == canvas.quickReject(r8)); 134 REPORTER_ASSERT(reporter, true == canvas.quickReject(r9)); 135 REPORTER_ASSERT(reporter, true == canvas.quickReject(r10)); 136 137 SkMatrix m = SkMatrix::MakeScale(2.0f); 138 m.setTranslateX(10.0f); 139 m.setTranslateY(10.0f); 140 canvas.setMatrix(m); 141 SkRect r11 = SkRect::MakeLTRB(5.0f, 5.0f, 100.0f, 100.0f); 142 SkRect r12 = SkRect::MakeLTRB(5.0f, 50.0f, 100.0f, 100.0f); 143 SkRect r13 = SkRect::MakeLTRB(50.0f, 5.0f, 100.0f, 100.0f); 144 REPORTER_ASSERT(reporter, false == canvas.quickReject(r11)); 145 REPORTER_ASSERT(reporter, true == canvas.quickReject(r12)); 146 REPORTER_ASSERT(reporter, true == canvas.quickReject(r13)); 147 } 148 149 DEF_TEST(QuickReject, reporter) { 150 test_drawBitmap(reporter); 151 test_layers(reporter); 152 test_quick_reject(reporter); 153 } 154 155 // Regression test to make sure that we keep fIsScaleTranslate up to date on the canvas. 156 // It is possible to set a new matrix on the canvas without calling setMatrix(). This tests 157 // that code path. 158 DEF_TEST(QuickReject_MatrixState, reporter) { 159 SkCanvas canvas(100, 100); 160 161 SkMatrix matrix; 162 matrix.setRotate(45.0f); 163 canvas.setMatrix(matrix); 164 165 SkPaint paint; 166 sk_sp<SkImageFilter> filter = SkLightingImageFilter::MakeDistantLitDiffuse( 167 SkPoint3::Make(1.0f, 1.0f, 1.0f), 0xFF0000FF, 2.0f, 0.5f, nullptr); 168 REPORTER_ASSERT(reporter, filter); 169 paint.setImageFilter(filter); 170 SkCanvas::SaveLayerRec rec; 171 rec.fPaint = &paint; 172 canvas.saveLayer(rec); 173 174 // quickReject() will assert if the matrix is out of sync. 175 canvas.quickReject(SkRect::MakeWH(100.0f, 100.0f)); 176 } 177
