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 "include/core/SkBitmap.h"
9#include "include/core/SkCanvas.h"
10#include "include/core/SkPoint3.h"
11#include "include/core/SkTypes.h"
12#include "include/effects/SkImageFilters.h"
13#include "src/core/SkArenaAlloc.h"
14#include "tests/Test.h"
15
16static void test_drawBitmap(skiatest::Reporter* reporter) {
17    SkBitmap src;
18    src.allocN32Pixels(10, 10);
19    src.eraseColor(SK_ColorWHITE);
20
21    SkBitmap dst;
22    dst.allocN32Pixels(10, 10);
23    dst.eraseColor(SK_ColorTRANSPARENT);
24
25    SkCanvas canvas(dst);
26
27    // we are initially transparent
28    REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
29
30    // we see the bitmap drawn
31    canvas.drawImage(src.asImage(), 0, 0);
32    REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5));
33
34    // reverify we are clear again
35    dst.eraseColor(SK_ColorTRANSPARENT);
36    REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
37
38    // if the bitmap is clipped out, we don't draw it
39    canvas.drawImage(src.asImage(), SkIntToScalar(-10), 0);
40    REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
41}
42
43static void test_layers(skiatest::Reporter* reporter) {
44    SkCanvas canvas(100, 100);
45
46    SkRect r = SkRect::MakeWH(10, 10);
47    REPORTER_ASSERT(reporter, false == canvas.quickReject(r));
48
49    r.offset(300, 300);
50    REPORTER_ASSERT(reporter, true == canvas.quickReject(r));
51
52    // Test that saveLayer updates quickReject
53    SkRect bounds = SkRect::MakeLTRB(50, 50, 70, 70);
54    canvas.saveLayer(&bounds, nullptr);
55    REPORTER_ASSERT(reporter, true == canvas.quickReject(SkRect::MakeWH(10, 10)));
56    REPORTER_ASSERT(reporter, false == canvas.quickReject(SkRect::MakeWH(60, 60)));
57}
58
59static void test_quick_reject(skiatest::Reporter* reporter) {
60    SkCanvas canvas(100, 100);
61    SkRect r0 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, 50.0f);
62    SkRect r1 = SkRect::MakeLTRB(-50.0f, 110.0f, 50.0f, 120.0f);
63    SkRect r2 = SkRect::MakeLTRB(110.0f, -50.0f, 120.0f, 50.0f);
64    SkRect r3 = SkRect::MakeLTRB(-120.0f, -50.0f, 120.0f, 50.0f);
65    SkRect r4 = SkRect::MakeLTRB(-50.0f, -120.0f, 50.0f, 120.0f);
66    SkRect r5 = SkRect::MakeLTRB(-120.0f, -120.0f, 120.0f, 120.0f);
67    SkRect r6 = SkRect::MakeLTRB(-120.0f, -120.0f, -110.0f, -110.0f);
68    SkRect r7 = SkRect::MakeLTRB(SK_ScalarNaN, -50.0f, 50.0f, 50.0f);
69    SkRect r8 = SkRect::MakeLTRB(-50.0f, SK_ScalarNaN, 50.0f, 50.0f);
70    SkRect r9 = SkRect::MakeLTRB(-50.0f, -50.0f, SK_ScalarNaN, 50.0f);
71    SkRect r10 = SkRect::MakeLTRB(-50.0f, -50.0f, 50.0f, SK_ScalarNaN);
72    REPORTER_ASSERT(reporter, false == canvas.quickReject(r0));
73    REPORTER_ASSERT(reporter, true == canvas.quickReject(r1));
74    REPORTER_ASSERT(reporter, true == canvas.quickReject(r2));
75    REPORTER_ASSERT(reporter, false == canvas.quickReject(r3));
76    REPORTER_ASSERT(reporter, false == canvas.quickReject(r4));
77    REPORTER_ASSERT(reporter, false == canvas.quickReject(r5));
78    REPORTER_ASSERT(reporter, true == canvas.quickReject(r6));
79    REPORTER_ASSERT(reporter, true == canvas.quickReject(r7));
80    REPORTER_ASSERT(reporter, true == canvas.quickReject(r8));
81    REPORTER_ASSERT(reporter, true == canvas.quickReject(r9));
82    REPORTER_ASSERT(reporter, true == canvas.quickReject(r10));
83
84    SkMatrix m = SkMatrix::Scale(2, 2);
85    m.setTranslateX(10.0f);
86    m.setTranslateY(10.0f);
87    canvas.setMatrix(m);
88    SkRect r11 = SkRect::MakeLTRB(5.0f, 5.0f, 100.0f, 100.0f);
89    SkRect r12 = SkRect::MakeLTRB(5.0f, 50.0f, 100.0f, 100.0f);
90    SkRect r13 = SkRect::MakeLTRB(50.0f, 5.0f, 100.0f, 100.0f);
91    REPORTER_ASSERT(reporter, false == canvas.quickReject(r11));
92    REPORTER_ASSERT(reporter, true == canvas.quickReject(r12));
93    REPORTER_ASSERT(reporter, true == canvas.quickReject(r13));
94}
95
96DEF_TEST(QuickReject, reporter) {
97    test_drawBitmap(reporter);
98    test_layers(reporter);
99    test_quick_reject(reporter);
100}
101
102// Regression test to make sure that we keep fIsScaleTranslate up to date on the canvas.
103// It is possible to set a new matrix on the canvas without calling setMatrix().  This tests
104// that code path.
105DEF_TEST(QuickReject_MatrixState, reporter) {
106    SkCanvas canvas(100, 100);
107
108    SkMatrix matrix;
109    matrix.setRotate(45.0f);
110    canvas.setMatrix(matrix);
111
112    SkPaint paint;
113    sk_sp<SkImageFilter> filter = SkImageFilters::DistantLitDiffuse(
114            SkPoint3::Make(1.0f, 1.0f, 1.0f), 0xFF0000FF, 2.0f, 0.5f, nullptr);
115    REPORTER_ASSERT(reporter, filter);
116    paint.setImageFilter(filter);
117    SkCanvas::SaveLayerRec rec;
118    rec.fPaint = &paint;
119    canvas.saveLayer(rec);
120
121    // quickReject() will assert if the matrix is out of sync.
122    canvas.quickReject(SkRect::MakeWH(100.0f, 100.0f));
123}
124