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Diffstat (limited to 'tests/PaintBreakTextTest.cpp')
-rw-r--r-- | tests/PaintBreakTextTest.cpp | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/tests/PaintBreakTextTest.cpp b/tests/PaintBreakTextTest.cpp new file mode 100644 index 0000000000..474bbf686a --- /dev/null +++ b/tests/PaintBreakTextTest.cpp @@ -0,0 +1,84 @@ +/* + * Copyright 2011-2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkPaint.h" +#include "Test.h" + +static void test_monotonic(skiatest::Reporter* reporter, + const SkPaint& paint, + const char* msg) { + const char* text = "sdfkljAKLDFJKEWkldfjlk#$%&sdfs.dsj"; + const size_t length = strlen(text); + const SkScalar width = paint.measureText(text, length); + + SkScalar mm = 0; + size_t nn = 0; + const SkScalar step = SkMaxScalar(width / 10, SK_Scalar1); + for (SkScalar w = 0; w <= width; w += step) { + SkScalar m; + const size_t n = paint.breakText(text, length, w, &m); + + REPORTER_ASSERT_MESSAGE(reporter, n <= length, msg); + REPORTER_ASSERT_MESSAGE(reporter, m <= width, msg); + + if (n == 0) { + REPORTER_ASSERT_MESSAGE(reporter, m == 0, msg); + } else { + // now assert that we're monotonic + if (n == nn) { + REPORTER_ASSERT_MESSAGE(reporter, m == mm, msg); + } else { + REPORTER_ASSERT_MESSAGE(reporter, n > nn, msg); + REPORTER_ASSERT_MESSAGE(reporter, m > mm, msg); + } + } + nn = n; + mm = m; + } +} + +static void test_eq_measure_text(skiatest::Reporter* reporter, + const SkPaint& paint, + const char* msg) { + const char* text = "The ultimate measure of a man is not where he stands in moments of comfort " + "and convenience, but where he stands at times of challenge and controversy."; + const size_t length = strlen(text); + const SkScalar width = paint.measureText(text, length); + + SkScalar mm; + const size_t length2 = paint.breakText(text, length, width, &mm); + REPORTER_ASSERT_MESSAGE(reporter, length2 == length, msg); + REPORTER_ASSERT_MESSAGE(reporter, mm == width, msg); +} + +static void test_long_text(skiatest::Reporter* reporter, + const SkPaint& paint, + const char* msg) { + static const int kSize = 16 * 1024; + SkAutoMalloc block(kSize); + memset(block.get(), 'a', kSize - 1); + char* text = static_cast<char*>(block.get()); + text[kSize - 1] = '\0'; + const SkScalar width = paint.measureText(text, kSize); + + SkScalar mm; + const size_t length = paint.breakText(text, kSize, width, &mm); + REPORTER_ASSERT_MESSAGE(reporter, length == kSize, msg); + REPORTER_ASSERT_MESSAGE(reporter, mm == width, msg); +} + +DEF_TEST(PaintBreakText, reporter) { + SkPaint paint; + test_monotonic(reporter, paint, "default"); + test_eq_measure_text(reporter, paint, "default"); + test_long_text(reporter, paint, "default"); + paint.setTextSize(SkIntToScalar(1 << 17)); + test_monotonic(reporter, paint, "huge text size"); + test_eq_measure_text(reporter, paint, "huge text size"); + paint.setTextSize(0); + test_monotonic(reporter, paint, "zero text size"); +} |