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