1 /*
2 * Copyright 2011-2016 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 "SkAutoMalloc.h"
9 #include "SkPaint.h"
10 #include "Test.h"
11
test_monotonic(skiatest::Reporter * reporter,const SkPaint & paint,const char * msg)12 static void test_monotonic(skiatest::Reporter* reporter,
13 const SkPaint& paint,
14 const char* msg) {
15 const char* text = "sdfkljAKLDFJKEWkldfjlk#$%&sdfs.dsj";
16 const size_t length = strlen(text);
17 const SkScalar width = paint.measureText(text, length);
18
19 SkScalar mm = 0;
20 size_t nn = 0;
21 const SkScalar step = SkMaxScalar(width / 10, SK_Scalar1);
22 for (SkScalar w = 0; w <= width; w += step) {
23 SkScalar m;
24 const size_t n = paint.breakText(text, length, w, &m);
25
26 REPORTER_ASSERT_MESSAGE(reporter, n <= length, msg);
27 REPORTER_ASSERT_MESSAGE(reporter, m <= width, msg);
28
29 if (n == 0) {
30 REPORTER_ASSERT_MESSAGE(reporter, m == 0, msg);
31 } else {
32 // now assert that we're monotonic
33 if (n == nn) {
34 REPORTER_ASSERT_MESSAGE(reporter, m == mm, msg);
35 } else {
36 REPORTER_ASSERT_MESSAGE(reporter, n > nn, msg);
37 REPORTER_ASSERT_MESSAGE(reporter, m > mm, msg);
38 }
39 }
40 nn = n;
41 mm = m;
42 }
43 }
44
test_eq_measure_text(skiatest::Reporter * reporter,const SkPaint & paint,const char * msg)45 static void test_eq_measure_text(skiatest::Reporter* reporter,
46 const SkPaint& paint,
47 const char* msg) {
48 const char* text = "The ultimate measure of a man is not where he stands in moments of comfort "
49 "and convenience, but where he stands at times of challenge and controversy.";
50 const size_t length = strlen(text);
51 const SkScalar width = paint.measureText(text, length);
52
53 SkScalar mm;
54 const size_t length2 = paint.breakText(text, length, width, &mm);
55 REPORTER_ASSERT_MESSAGE(reporter, length2 == length, msg);
56 REPORTER_ASSERT_MESSAGE(reporter, mm == width, msg);
57 }
58
test_long_text(skiatest::Reporter * reporter,const SkPaint & paint,const char * msg)59 static void test_long_text(skiatest::Reporter* reporter,
60 const SkPaint& paint,
61 const char* msg) {
62 static const int kSize = 16 * 1024;
63 SkAutoMalloc block(kSize);
64 memset(block.get(), 'a', kSize - 1);
65 char* text = static_cast<char*>(block.get());
66 text[kSize - 1] = '\0';
67 const SkScalar width = paint.measureText(text, kSize);
68
69 SkScalar mm;
70 const size_t length = paint.breakText(text, kSize, width, &mm);
71 REPORTER_ASSERT_MESSAGE(reporter, length == kSize, msg);
72 REPORTER_ASSERT_MESSAGE(reporter, mm == width, msg);
73 }
74
DEF_TEST(PaintBreakText,reporter)75 DEF_TEST(PaintBreakText, reporter) {
76 SkPaint paint;
77 test_monotonic(reporter, paint, "default");
78 test_eq_measure_text(reporter, paint, "default");
79 test_long_text(reporter, paint, "default");
80 paint.setTextSize(SkIntToScalar(1 << 17));
81 test_monotonic(reporter, paint, "huge text size");
82 test_eq_measure_text(reporter, paint, "huge text size");
83 paint.setTextSize(0);
84 test_monotonic(reporter, paint, "zero text size");
85 }
86