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      1 /*
      2  * Copyright 2011 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 "SkUtils.h"
     10 #include "Test.h"
     11 
     12 // Unicode Variation Selector ranges: inclusive
     13 #define UVS_MIN0    0x180B
     14 #define UVS_MAX0    0x180D
     15 #define UVS_MIN1    0xFE00
     16 #define UVS_MAX1    0xFE0F
     17 #define UVS_MIN2    0xE0100
     18 #define UVS_MAX2    0xE01EF
     19 
     20 static bool isUVS(SkUnichar uni) {
     21     return (uni >= UVS_MIN0 && uni <= UVS_MAX0) ||
     22            (uni >= UVS_MIN1 && uni <= UVS_MAX1) ||
     23            (uni >= UVS_MIN2 && uni <= UVS_MAX2);
     24 }
     25 
     26 static void test_uvs(skiatest::Reporter* reporter) {
     27     // [min, max], [min, max] ... inclusive
     28     static const SkUnichar gRanges[] = {
     29         UVS_MIN0, UVS_MAX0, UVS_MIN1, UVS_MAX1, UVS_MIN2, UVS_MAX2
     30     };
     31 
     32     for (size_t i = 0; i < SK_ARRAY_COUNT(gRanges); i += 2) {
     33         for (SkUnichar uni = gRanges[i] - 8; uni <= gRanges[i+1] + 8; ++uni) {
     34             bool uvs0 = isUVS(uni);
     35             bool uvs1 = SkUnichar_IsVariationSelector(uni);
     36             REPORTER_ASSERT(reporter, uvs0 == uvs1);
     37         }
     38     }
     39 }
     40 
     41 // Simple test to ensure that when we call textToGlyphs, we get the same
     42 // result (for the same text) when using UTF8, UTF16, UTF32.
     43 // TODO: make the text more complex (i.e. incorporate chars>7bits)
     44 static void test_textencodings(skiatest::Reporter* reporter) {
     45     const char text8[] = "ABCDEFGabcdefg0123456789";
     46     uint16_t text16[sizeof(text8)];
     47     int32_t  text32[sizeof(text8)];
     48     size_t len8 = strlen(text8);
     49     size_t len16 = len8 * 2;
     50     size_t len32 = len8 * 4;
     51 
     52     // expand our 8bit chars to 16 and 32
     53     for (size_t i = 0; i < len8; ++i) {
     54         text32[i] = text16[i] = text8[i];
     55     }
     56 
     57     uint16_t glyphs8[sizeof(text8)];
     58     uint16_t glyphs16[sizeof(text8)];
     59     uint16_t glyphs32[sizeof(text8)];
     60 
     61     SkPaint paint;
     62 
     63     paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
     64     int count8  = paint.textToGlyphs(text8,  len8,  glyphs8);
     65 
     66     paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
     67     int count16 = paint.textToGlyphs(text16, len16, glyphs16);
     68 
     69     paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
     70     int count32 = paint.textToGlyphs(text32, len32, glyphs32);
     71 
     72     REPORTER_ASSERT(reporter, (int)len8 == count8);
     73     REPORTER_ASSERT(reporter, (int)len8 == count16);
     74     REPORTER_ASSERT(reporter, (int)len8 == count32);
     75 
     76     REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs16, count8 * sizeof(uint16_t)));
     77     REPORTER_ASSERT(reporter, !memcmp(glyphs8, glyphs32, count8 * sizeof(uint16_t)));
     78 }
     79 
     80 DEF_TEST(Unicode, reporter) {
     81     test_uvs(reporter);
     82     test_textencodings(reporter);
     83 }
     84