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 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(reporter, n <= length, msg); 27 REPORTER_ASSERT(reporter, m <= width, msg); 28 29 if (n == 0) { 30 REPORTER_ASSERT(reporter, m == 0, msg); 31 } else { 32 // now assert that we're monotonic 33 if (n == nn) { 34 REPORTER_ASSERT(reporter, m == mm, msg); 35 } else { 36 REPORTER_ASSERT(reporter, n > nn, msg); 37 REPORTER_ASSERT(reporter, m > mm, msg); 38 } 39 } 40 nn = n; 41 mm = m; 42 } 43 } 44 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(reporter, length2 == length, msg); 56 REPORTER_ASSERT(reporter, mm == width, msg); 57 } 58 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(reporter, length == kSize, msg); 72 REPORTER_ASSERT(reporter, mm == width, msg); 73 } 74 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
