1 /* 2 * Copyright 2011 Google Inc. All Rights Reserved. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "sfntly/data/writable_font_data.h" 18 19 #include "sfntly/data/memory_byte_array.h" 20 #include "sfntly/data/growable_memory_byte_array.h" 21 22 namespace sfntly { 23 24 WritableFontData::WritableFontData(ByteArray* ba) : ReadableFontData(ba) { 25 } 26 27 WritableFontData::~WritableFontData() {} 28 29 // static 30 CALLER_ATTACH 31 WritableFontData* WritableFontData::CreateWritableFontData(int32_t length) { 32 ByteArrayPtr ba; 33 if (length > 0) { 34 ba = new MemoryByteArray(length); 35 ba->SetFilledLength(length); 36 } else { 37 ba = new GrowableMemoryByteArray(); 38 } 39 WritableFontDataPtr wfd = new WritableFontData(ba); 40 return wfd.Detach(); 41 } 42 43 // TODO(arthurhsu): re-investigate the memory model of this function. It's 44 // not too useful without copying, but it's not performance 45 // savvy to do copying. 46 CALLER_ATTACH 47 WritableFontData* WritableFontData::CreateWritableFontData(ByteVector* b) { 48 ByteArrayPtr ba = new GrowableMemoryByteArray(); 49 ba->Put(0, b); 50 WritableFontDataPtr wfd = new WritableFontData(ba); 51 return wfd.Detach(); 52 } 53 54 int32_t WritableFontData::WriteByte(int32_t index, byte_t b) { 55 array_->Put(BoundOffset(index), b); 56 return 1; 57 } 58 59 int32_t WritableFontData::WriteBytes(int32_t index, 60 byte_t* b, 61 int32_t offset, 62 int32_t length) { 63 return array_->Put(BoundOffset(index), 64 b, 65 offset, 66 BoundLength(index, length)); 67 } 68 69 int32_t WritableFontData::WriteBytes(int32_t index, ByteVector* b) { 70 assert(b); 71 return WriteBytes(index, &((*b)[0]), 0, b->size()); 72 } 73 74 int32_t WritableFontData::WriteBytesPad(int32_t index, 75 ByteVector* b, 76 int32_t offset, 77 int32_t length, 78 byte_t pad) { 79 int32_t written = 80 array_->Put(BoundOffset(index), 81 &((*b)[0]), 82 offset, 83 BoundLength(index, 84 std::min<int32_t>(length, b->size() - offset))); 85 written += WritePadding(written + index, length - written, pad); 86 return written; 87 } 88 89 int32_t WritableFontData::WritePadding(int32_t index, int32_t count) { 90 return WritePadding(index, count, (byte_t)0); 91 } 92 93 int32_t WritableFontData::WritePadding(int32_t index, int32_t count, 94 byte_t pad) { 95 for (int32_t i = 0; i < count; ++i) { 96 array_->Put(index + i, pad); 97 } 98 return count; 99 } 100 101 int32_t WritableFontData::WriteChar(int32_t index, byte_t c) { 102 return WriteByte(index, c); 103 } 104 105 int32_t WritableFontData::WriteUShort(int32_t index, int32_t us) { 106 WriteByte(index, (byte_t)((us >> 8) & 0xff)); 107 WriteByte(index + 1, (byte_t)(us & 0xff)); 108 return 2; 109 } 110 111 int32_t WritableFontData::WriteUShortLE(int32_t index, int32_t us) { 112 WriteByte(index, (byte_t)(us & 0xff)); 113 WriteByte(index + 1, (byte_t)((us >> 8) & 0xff)); 114 return 2; 115 } 116 117 int32_t WritableFontData::WriteShort(int32_t index, int32_t s) { 118 return WriteUShort(index, s); 119 } 120 121 int32_t WritableFontData::WriteUInt24(int32_t index, int32_t ui) { 122 WriteByte(index, (byte_t)((ui >> 16) & 0xff)); 123 WriteByte(index + 1, (byte_t)((ui >> 8) & 0xff)); 124 WriteByte(index + 2, (byte_t)(ui & 0xff)); 125 return 3; 126 } 127 128 int32_t WritableFontData::WriteULong(int32_t index, int64_t ul) { 129 WriteByte(index, (byte_t)((ul >> 24) & 0xff)); 130 WriteByte(index + 1, (byte_t)((ul >> 16) & 0xff)); 131 WriteByte(index + 2, (byte_t)((ul >> 8) & 0xff)); 132 WriteByte(index + 3, (byte_t)(ul & 0xff)); 133 return 4; 134 } 135 136 int32_t WritableFontData::WriteULongLE(int32_t index, int64_t ul) { 137 WriteByte(index, (byte_t)(ul & 0xff)); 138 WriteByte(index + 1, (byte_t)((ul >> 8) & 0xff)); 139 WriteByte(index + 2, (byte_t)((ul >> 16) & 0xff)); 140 WriteByte(index + 3, (byte_t)((ul >> 24) & 0xff)); 141 return 4; 142 } 143 144 int32_t WritableFontData::WriteLong(int32_t index, int64_t l) { 145 return WriteULong(index, l); 146 } 147 148 int32_t WritableFontData::WriteFixed(int32_t index, int32_t f) { 149 return WriteLong(index, f); 150 } 151 152 int32_t WritableFontData::WriteDateTime(int32_t index, int64_t date) { 153 WriteULong(index, (date >> 32) & 0xffffffff); 154 WriteULong(index + 4, date & 0xffffffff); 155 return 8; 156 } 157 158 void WritableFontData::CopyFrom(InputStream* is, int32_t length) { 159 array_->CopyFrom(is, length); 160 } 161 162 void WritableFontData::CopyFrom(InputStream* is) { 163 array_->CopyFrom(is); 164 } 165 166 CALLER_ATTACH FontData* WritableFontData::Slice(int32_t offset, 167 int32_t length) { 168 if (offset < 0 || offset + length > Size()) { 169 #if !defined (SFNTLY_NO_EXCEPTION) 170 throw IndexOutOfBoundsException( 171 "Attempt to bind data outside of its limits"); 172 #endif 173 return NULL; 174 } 175 FontDataPtr slice = new WritableFontData(this, offset, length); 176 return slice.Detach(); 177 } 178 179 CALLER_ATTACH FontData* WritableFontData::Slice(int32_t offset) { 180 if (offset > Size()) { 181 #if !defined (SFNTLY_NO_EXCEPTION) 182 throw IndexOutOfBoundsException( 183 "Attempt to bind data outside of its limits"); 184 #endif 185 return NULL; 186 } 187 FontDataPtr slice = new WritableFontData(this, offset); 188 return slice.Detach(); 189 } 190 191 WritableFontData::WritableFontData(WritableFontData* data, int32_t offset) 192 : ReadableFontData(data, offset) { 193 } 194 195 WritableFontData::WritableFontData(WritableFontData* data, 196 int32_t offset, 197 int32_t length) 198 : ReadableFontData(data, offset, length) { 199 } 200 201 } // namespace sfntly 202
