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comparison: gfx/ots/src/maxp.cc
gfx/ots/src/maxp.cc
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| -1:000000000000 | 0:2cb4ee6ff11d |
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| 1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "maxp.h" | |
| 6 | |
| 7 // maxp - Maximum Profile | |
| 8 // http://www.microsoft.com/typography/otspec/maxp.htm | |
| 9 | |
| 10 #define TABLE_NAME "maxp" | |
| 11 | |
| 12 namespace ots { | |
| 13 | |
| 14 bool ots_maxp_parse(OpenTypeFile *file, const uint8_t *data, size_t length) { | |
| 15 Buffer table(data, length); | |
| 16 | |
| 17 OpenTypeMAXP *maxp = new OpenTypeMAXP; | |
| 18 file->maxp = maxp; | |
| 19 | |
| 20 uint32_t version = 0; | |
| 21 if (!table.ReadU32(&version)) { | |
| 22 return OTS_FAILURE_MSG("Failed to read version of maxp table"); | |
| 23 } | |
| 24 | |
| 25 if (version >> 16 > 1) { | |
| 26 return OTS_FAILURE_MSG("Bad maxp version %d", version); | |
| 27 } | |
| 28 | |
| 29 if (!table.ReadU16(&maxp->num_glyphs)) { | |
| 30 return OTS_FAILURE_MSG("Failed to read number of glyphs from maxp table"); | |
| 31 } | |
| 32 | |
| 33 if (!maxp->num_glyphs) { | |
| 34 return OTS_FAILURE_MSG("Bad number of glyphs 0 in maxp table"); | |
| 35 } | |
| 36 | |
| 37 if (version >> 16 == 1) { | |
| 38 maxp->version_1 = true; | |
| 39 if (!table.ReadU16(&maxp->max_points) || | |
| 40 !table.ReadU16(&maxp->max_contours) || | |
| 41 !table.ReadU16(&maxp->max_c_points) || | |
| 42 !table.ReadU16(&maxp->max_c_contours) || | |
| 43 !table.ReadU16(&maxp->max_zones) || | |
| 44 !table.ReadU16(&maxp->max_t_points) || | |
| 45 !table.ReadU16(&maxp->max_storage) || | |
| 46 !table.ReadU16(&maxp->max_fdefs) || | |
| 47 !table.ReadU16(&maxp->max_idefs) || | |
| 48 !table.ReadU16(&maxp->max_stack) || | |
| 49 !table.ReadU16(&maxp->max_size_glyf_instructions) || | |
| 50 !table.ReadU16(&maxp->max_c_components) || | |
| 51 !table.ReadU16(&maxp->max_c_depth)) { | |
| 52 return OTS_FAILURE_MSG("Failed to read maxp table"); | |
| 53 } | |
| 54 | |
| 55 if (maxp->max_zones == 0) { | |
| 56 // workaround for ipa*.ttf Japanese fonts. | |
| 57 OTS_WARNING("bad max_zones: %u", maxp->max_zones); | |
| 58 maxp->max_zones = 1; | |
| 59 } else if (maxp->max_zones == 3) { | |
| 60 // workaround for Ecolier-*.ttf fonts. | |
| 61 OTS_WARNING("bad max_zones: %u", maxp->max_zones); | |
| 62 maxp->max_zones = 2; | |
| 63 } | |
| 64 | |
| 65 if ((maxp->max_zones != 1) && (maxp->max_zones != 2)) { | |
| 66 return OTS_FAILURE_MSG("Bad max zones %d in maxp", maxp->max_zones); | |
| 67 } | |
| 68 } else { | |
| 69 maxp->version_1 = false; | |
| 70 } | |
| 71 | |
| 72 return true; | |
| 73 } | |
| 74 | |
| 75 bool ots_maxp_should_serialise(OpenTypeFile *file) { | |
| 76 return file->maxp != NULL; | |
| 77 } | |
| 78 | |
| 79 bool ots_maxp_serialise(OTSStream *out, OpenTypeFile *file) { | |
| 80 const OpenTypeMAXP *maxp = file->maxp; | |
| 81 | |
| 82 if (!out->WriteU32(maxp->version_1 ? 0x00010000 : 0x00005000) || | |
| 83 !out->WriteU16(maxp->num_glyphs)) { | |
| 84 return OTS_FAILURE_MSG("Failed to write maxp version or number of glyphs"); | |
| 85 } | |
| 86 | |
| 87 if (!maxp->version_1) return true; | |
| 88 | |
| 89 if (!out->WriteU16(maxp->max_points) || | |
| 90 !out->WriteU16(maxp->max_contours) || | |
| 91 !out->WriteU16(maxp->max_c_points) || | |
| 92 !out->WriteU16(maxp->max_c_contours)) { | |
| 93 return OTS_FAILURE_MSG("Failed to write maxp"); | |
| 94 } | |
| 95 | |
| 96 if (g_transcode_hints) { | |
| 97 if (!out->WriteU16(maxp->max_zones) || | |
| 98 !out->WriteU16(maxp->max_t_points) || | |
| 99 !out->WriteU16(maxp->max_storage) || | |
| 100 !out->WriteU16(maxp->max_fdefs) || | |
| 101 !out->WriteU16(maxp->max_idefs) || | |
| 102 !out->WriteU16(maxp->max_stack) || | |
| 103 !out->WriteU16(maxp->max_size_glyf_instructions)) { | |
| 104 return OTS_FAILURE_MSG("Failed to write more maxp"); | |
| 105 } | |
| 106 } else { | |
| 107 if (!out->WriteU16(1) || // max zones | |
| 108 !out->WriteU16(0) || // max twilight points | |
| 109 !out->WriteU16(0) || // max storage | |
| 110 !out->WriteU16(0) || // max function defs | |
| 111 !out->WriteU16(0) || // max instruction defs | |
| 112 !out->WriteU16(0) || // max stack elements | |
| 113 !out->WriteU16(0)) { // max instruction byte count | |
| 114 return OTS_FAILURE_MSG("Failed to write more maxp"); | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 if (!out->WriteU16(maxp->max_c_components) || | |
| 119 !out->WriteU16(maxp->max_c_depth)) { | |
| 120 return OTS_FAILURE_MSG("Failed to write yet more maxp"); | |
| 121 } | |
| 122 | |
| 123 return true; | |
| 124 } | |
| 125 | |
| 126 void ots_maxp_free(OpenTypeFile *file) { | |
| 127 delete file->maxp; | |
| 128 } | |
| 129 | |
| 130 } // namespace ots |
