PDFGlyphsToUnicodeTest.cpp 5.7 KB

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  1. /*
  2. * Copyright 2010 The Android Open Source Project
  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. #include "tests/Test.h"
  8. #ifdef SK_SUPPORT_PDF
  9. #include "include/core/SkData.h"
  10. #include "include/core/SkStream.h"
  11. #include "include/private/SkTo.h"
  12. #include "src/pdf/SkPDFMakeToUnicodeCmap.h"
  13. #include "src/utils/SkBitSet.h"
  14. static constexpr SkGlyphID kMaximumGlyphIndex = UINT16_MAX;
  15. static bool stream_equals(const SkDynamicMemoryWStream& stream, size_t offset,
  16. const char* buffer, size_t len) {
  17. if (len != strlen(buffer)) {
  18. return false;
  19. }
  20. const size_t streamSize = stream.bytesWritten();
  21. if (offset + len > streamSize) {
  22. return false;
  23. }
  24. SkAutoTMalloc<char> data(streamSize);
  25. stream.copyTo(data.get());
  26. return memcmp(data.get() + offset, buffer, len) == 0;
  27. }
  28. DEF_TEST(SkPDF_ToUnicode, reporter) {
  29. SkTDArray<SkUnichar> glyphToUnicode;
  30. SkTDArray<uint16_t> glyphsInSubset;
  31. SkPDFGlyphUse subset(1, kMaximumGlyphIndex);
  32. glyphToUnicode.push_back(0); // 0
  33. glyphToUnicode.push_back(0); // 1
  34. glyphToUnicode.push_back(0); // 2
  35. glyphsInSubset.push_back(3);
  36. glyphToUnicode.push_back(0x20); // 3
  37. glyphsInSubset.push_back(4);
  38. glyphToUnicode.push_back(0x25); // 4
  39. glyphsInSubset.push_back(5);
  40. glyphToUnicode.push_back(0x27); // 5
  41. glyphsInSubset.push_back(6);
  42. glyphToUnicode.push_back(0x28); // 6
  43. glyphsInSubset.push_back(7);
  44. glyphToUnicode.push_back(0x29); // 7
  45. glyphsInSubset.push_back(8);
  46. glyphToUnicode.push_back(0x2F); // 8
  47. glyphsInSubset.push_back(9);
  48. glyphToUnicode.push_back(0x33); // 9
  49. glyphToUnicode.push_back(0); // 10
  50. glyphsInSubset.push_back(11);
  51. glyphToUnicode.push_back(0x35); // 11
  52. glyphsInSubset.push_back(12);
  53. glyphToUnicode.push_back(0x36); // 12
  54. glyphsInSubset.push_back(13);
  55. glyphToUnicode.push_back(0x37); // 13
  56. for (uint16_t i = 14; i < 0xFE; ++i) {
  57. glyphToUnicode.push_back(0); // Zero from index 0x9 to 0xFD
  58. }
  59. glyphsInSubset.push_back(0xFE);
  60. glyphToUnicode.push_back(0x1010);
  61. glyphsInSubset.push_back(0xFF);
  62. glyphToUnicode.push_back(0x1011);
  63. glyphsInSubset.push_back(0x100);
  64. glyphToUnicode.push_back(0x1012);
  65. glyphsInSubset.push_back(0x101);
  66. glyphToUnicode.push_back(0x1013);
  67. SkGlyphID lastGlyphID = SkToU16(glyphToUnicode.count() - 1);
  68. SkDynamicMemoryWStream buffer;
  69. for (uint16_t v : glyphsInSubset) {
  70. subset.set(v);
  71. }
  72. SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 0,
  73. SkTMin<SkGlyphID>(0xFFFF, lastGlyphID));
  74. char expectedResult[] =
  75. "4 beginbfchar\n\
  76. <0003> <0020>\n\
  77. <0004> <0025>\n\
  78. <0008> <002F>\n\
  79. <0009> <0033>\n\
  80. endbfchar\n\
  81. 4 beginbfrange\n\
  82. <0005> <0007> <0027>\n\
  83. <000B> <000D> <0035>\n\
  84. <00FE> <00FF> <1010>\n\
  85. <0100> <0101> <1012>\n\
  86. endbfrange\n";
  87. REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResult,
  88. buffer.bytesWritten()));
  89. // Remove characters and ranges.
  90. buffer.reset();
  91. SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 8,
  92. SkTMin<SkGlyphID>(0x00FF, lastGlyphID));
  93. char expectedResultChop1[] =
  94. "2 beginbfchar\n\
  95. <0008> <002F>\n\
  96. <0009> <0033>\n\
  97. endbfchar\n\
  98. 2 beginbfrange\n\
  99. <000B> <000D> <0035>\n\
  100. <00FE> <00FF> <1010>\n\
  101. endbfrange\n";
  102. REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop1,
  103. buffer.bytesWritten()));
  104. // Remove characters from range to downdrade it to one char.
  105. buffer.reset();
  106. SkPDFAppendCmapSections(&glyphToUnicode[0], &subset, &buffer, true, 0x00D,
  107. SkTMin<SkGlyphID>(0x00FE, lastGlyphID));
  108. char expectedResultChop2[] =
  109. "2 beginbfchar\n\
  110. <000D> <0037>\n\
  111. <00FE> <1010>\n\
  112. endbfchar\n";
  113. REPORTER_ASSERT(reporter, stream_equals(buffer, 0, expectedResultChop2,
  114. buffer.bytesWritten()));
  115. buffer.reset();
  116. SkPDFAppendCmapSections(&glyphToUnicode[0], nullptr, &buffer, false, 0xFC,
  117. SkTMin<SkGlyphID>(0x110, lastGlyphID));
  118. char expectedResultSingleBytes[] =
  119. "2 beginbfchar\n\
  120. <01> <0000>\n\
  121. <02> <0000>\n\
  122. endbfchar\n\
  123. 1 beginbfrange\n\
  124. <03> <06> <1010>\n\
  125. endbfrange\n";
  126. REPORTER_ASSERT(reporter, stream_equals(buffer, 0,
  127. expectedResultSingleBytes,
  128. buffer.bytesWritten()));
  129. glyphToUnicode.reset();
  130. glyphsInSubset.reset();
  131. SkPDFGlyphUse subset2(1, kMaximumGlyphIndex);
  132. // Test mapping:
  133. // I n s t a l
  134. // Glyph id 2c 51 56 57 44 4f
  135. // Unicode 49 6e 73 74 61 6c
  136. for (SkUnichar i = 0; i < 100; ++i) {
  137. glyphToUnicode.push_back(i + 29);
  138. }
  139. lastGlyphID = SkToU16(glyphToUnicode.count() - 1);
  140. glyphsInSubset.push_back(0x2C);
  141. glyphsInSubset.push_back(0x44);
  142. glyphsInSubset.push_back(0x4F);
  143. glyphsInSubset.push_back(0x51);
  144. glyphsInSubset.push_back(0x56);
  145. glyphsInSubset.push_back(0x57);
  146. SkDynamicMemoryWStream buffer2;
  147. for (uint16_t v : glyphsInSubset) {
  148. subset2.set(v);
  149. }
  150. SkPDFAppendCmapSections(&glyphToUnicode[0], &subset2, &buffer2, true, 0,
  151. SkTMin<SkGlyphID>(0xFFFF, lastGlyphID));
  152. char expectedResult2[] =
  153. "4 beginbfchar\n\
  154. <002C> <0049>\n\
  155. <0044> <0061>\n\
  156. <004F> <006C>\n\
  157. <0051> <006E>\n\
  158. endbfchar\n\
  159. 1 beginbfrange\n\
  160. <0056> <0057> <0073>\n\
  161. endbfrange\n";
  162. REPORTER_ASSERT(reporter, stream_equals(buffer2, 0, expectedResult2,
  163. buffer2.bytesWritten()));
  164. }
  165. #endif