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