2 * Copyright 2013 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #include "SkDeviceLooper.h"
9 #include "SkRasterClip.h"
12 static void make_bm(SkBitmap* bm, int w, int h) {
13 bm->allocPixels(SkImageInfo::Make(w, h, kAlpha_8_SkColorType,
14 kPremul_SkAlphaType));
17 static bool equal(const SkRasterClip& a, const SkRasterClip& b) {
19 return b.isBW() && a.bwRgn() == b.bwRgn();
21 return a.isAA() && a.aaRgn() == b.aaRgn();
30 { { 4000, 10 }, { 0, 0, 4000, 10 }, { 0, 0, 4000, 4000 } },
31 { { 10, 4000 }, { 0, 0, 10, 4000 }, { 0, 0, 4000, 4000 } },
32 // very large devce, small rect
33 { { 32000, 10 }, { 0, 0, 32000, 10 }, { 0, 0, 4000, 4000 } },
34 { { 10, 32000 }, { 0, 0, 10, 32000 }, { 0, 0, 4000, 4000 } },
35 // very large device, small clip
36 { { 32000, 10 }, { 0, 0, 4000, 10 }, { 0, 0, 32000, 32000 } },
37 { { 10, 32000 }, { 0, 0, 10, 4000 }, { 0, 0, 32000, 32000 } },
40 static void test_simple(skiatest::Reporter* reporter) {
42 for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
44 make_bm(&bitmap, gRec[i].fDevSize.width(), gRec[i].fDevSize.height());
46 SkRasterClip rc(gRec[i].fRCBounds);
48 for (int aa = 0; aa <= 1; ++aa) {
49 SkDeviceLooper looper(bitmap, rc, gRec[i].fRect, SkToBool(aa));
51 bool valid = looper.next();
52 REPORTER_ASSERT(reporter, valid);
54 REPORTER_ASSERT(reporter, looper.getBitmap().width() == bitmap.width());
55 REPORTER_ASSERT(reporter, looper.getBitmap().height() == bitmap.height());
56 REPORTER_ASSERT(reporter, equal(looper.getRC(), rc));
58 REPORTER_ASSERT(reporter, !looper.next());
61 // test that a rect that doesn't intersect returns no loops
63 SkIRect r = rc.getBounds();
64 r.offset(r.width(), 0);
65 SkDeviceLooper looper(bitmap, rc, r, false);
66 REPORTER_ASSERT(reporter, !looper.next());
71 // mask-bits are interpreted as the areas where the clip is visible
75 static void make_rgn(SkRegion* rgn, int w, int h, unsigned mask) {
76 SkASSERT(SkAlign2(w));
77 SkASSERT(SkAlign2(h));
80 const SkIRect baseR = SkIRect::MakeWH(w, h);
83 for (int y = 0; y <= 1; ++y) {
84 for (int x = 0; x <= 1; ++x) {
87 r.offset(x * w, y * h);
88 rgn->op(r, SkRegion::kUnion_Op);
95 static void test_complex(skiatest::Reporter* reporter) {
96 // choose size values that will result in 4 quadrants, given fAA setting
97 const int BW_SIZE = 17 * 1000;
98 const int AA_SIZE = 7 * 1000;
104 { { BW_SIZE, BW_SIZE }, false },
105 { { AA_SIZE, AA_SIZE }, true },
108 for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
109 const int w = gRec[i].fSize.width();
110 const int h = gRec[i].fSize.height();
113 make_bm(&bitmap, w, h);
115 const SkIRect rect = SkIRect::MakeWH(w, h);
117 // mask-bits are interpreted as the areas where the clip is visible
121 for (int mask = 0; mask <= 15; ++mask) {
123 make_rgn(&rgn, w, h, mask);
126 rc.op(rgn, SkRegion::kReplace_Op);
128 SkDeviceLooper looper(bitmap, rc, rect, gRec[i].fAA);
129 while (looper.next()) {
130 REPORTER_ASSERT(reporter, !looper.getRC().isEmpty());
136 DEF_TEST(DeviceLooper, reporter) {
137 test_simple(reporter);
138 test_complex(reporter);