SkWriter32.h revision 046f1f6ff4b2b3f4571a9562e74f41e82419a4a1
1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 28a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2008 The Android Open Source Project 48a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com * 5ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Use of this source code is governed by a BSD-style license that can be 6ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * found in the LICENSE file. 78a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com */ 88a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 9ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 108a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#ifndef SkWriter32_DEFINED 118a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#define SkWriter32_DEFINED 128a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 1319382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkMatrix.h" 1494e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com#include "SkPath.h" 158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPoint.h" 164ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com#include "SkRRect.h" 1719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkRect.h" 182b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com#include "SkRegion.h" 1919382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkScalar.h" 2019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkStream.h" 2119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkTDArray.h" 2219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkTypes.h" 238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.comclass SkWriter32 : SkNoncopyable { 258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 26e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com /** 27e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com * The caller can specify an initial block of storage, which the caller manages. 2819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * 2919382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * SkWriter32 will try to back reserve and write calls with this external storage until the 3019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * first time an allocation doesn't fit. From then it will use dynamically allocated storage. 3119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * This used to be optional behavior, but pipe now relies on it. 32e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com */ 33046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkWriter32(void* external = NULL, size_t externalBytes = 0) 34046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org : fData(0) 35046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org , fCapacity(0) 36046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org , fUsed(0) 37046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org , fExternal(0) 38046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org { 3919382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org this->reset(external, externalBytes); 4019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 421cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com // return the current offset (will always be a multiple of 4) 43046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t bytesWritten() const { return fUsed; } 444469938e92d779dff05e745559e67907bbf21e78reed@google.com 454469938e92d779dff05e745559e67907bbf21e78reed@google.com SK_ATTR_DEPRECATED("use bytesWritten") 46adacc7067ad617cdc7bbef39192ca80f4b4d27f9robertphillips@google.com size_t size() const { return this->bytesWritten(); } 471cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com 4819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void reset(void* external = NULL, size_t externalBytes = 0) { 4919382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org SkASSERT(SkIsAlign4((uintptr_t)external)); 5019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org SkASSERT(SkIsAlign4(externalBytes)); 51046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org 52046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fData = (uint8_t*)external; 53046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fCapacity = externalBytes; 54046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fUsed = 0; 55046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fExternal = external; 56ff36a1d07f23f2b7feddaba110d448073a96f83ccommit-bot@chromium.org } 57ff36a1d07f23f2b7feddaba110d448073a96f83ccommit-bot@chromium.org 58046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org // Returns the current buffer. 59046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org // The pointer may be invalidated by any future write calls. 6019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org const uint32_t* contiguousArray() const { 61046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org return (uint32_t*)fData; 6219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 63b89a03c890668f98d9f8b269b6ad00824409435bskia.committer@gmail.com 645595af1b2ebe6590e98641464d43d22281a7f295reed@google.com // size MUST be multiple of 4 655595af1b2ebe6590e98641464d43d22281a7f295reed@google.com uint32_t* reserve(size_t size) { 665595af1b2ebe6590e98641464d43d22281a7f295reed@google.com SkASSERT(SkAlign4(size) == size); 67046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t offset = fUsed; 68046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t totalRequired = fUsed + size; 69046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org if (totalRequired > fCapacity) { 70046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org growToAtLeast(totalRequired); 7119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 72046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fUsed = totalRequired; 73046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org return (uint32_t*)(fData + offset); 7419382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 75b89a03c890668f98d9f8b269b6ad00824409435bskia.committer@gmail.com 76c6d3c444ca76feba5a8937dbc80626ade5347275commit-bot@chromium.org // Read or write 4 bytes at offset, which must be a multiple of 4 <= size(). 77046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org uint32_t read32At(size_t offset) { 78046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(SkAlign4(offset) == offset); 79046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(offset < fUsed); 80046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org return *(uint32_t*)(fData + offset); 81046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org } 82046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org 83046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org void write32At(size_t offset, uint32_t val) { 84046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(SkAlign4(offset) == offset); 85046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(offset < fUsed); 86046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org *(uint32_t*)(fData + offset) = val; 87046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org } 88a27096b4740775ae141fd0abaf456d706065c5eeskia.committer@gmail.com 898a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com bool writeBool(bool value) { 9019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org this->write32(value); 918a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com return value; 928a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 93fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 948a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void writeInt(int32_t value) { 9519382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org this->write32(value); 968a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 97fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 988a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void write8(int32_t value) { 998a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *(int32_t*)this->reserve(sizeof(value)) = value & 0xFF; 1008a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 101fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 1028a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void write16(int32_t value) { 1038a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *(int32_t*)this->reserve(sizeof(value)) = value & 0xFFFF; 1048a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 105fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 1068a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void write32(int32_t value) { 1078a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *(int32_t*)this->reserve(sizeof(value)) = value; 1088a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 109fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 11019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void writePtr(void* value) { 11119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org *(void**)this->reserve(sizeof(value)) = value; 11251c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com } 11351c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com 1148a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void writeScalar(SkScalar value) { 1158a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *(SkScalar*)this->reserve(sizeof(value)) = value; 1168a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 117fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 1188a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void writePoint(const SkPoint& pt) { 1198a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *(SkPoint*)this->reserve(sizeof(pt)) = pt; 1208a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 121fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 1228a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void writeRect(const SkRect& rect) { 1238a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *(SkRect*)this->reserve(sizeof(rect)) = rect; 1248a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 125306ab9d5de38f2a547fd1d69aedbe69b5c6617ccskia.committer@gmail.com 1265587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com void writeIRect(const SkIRect& rect) { 1275587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com *(SkIRect*)this->reserve(sizeof(rect)) = rect; 1285587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com } 1295587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com 1304ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com void writeRRect(const SkRRect& rrect) { 1314ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com rrect.writeToMemory(this->reserve(SkRRect::kSizeInMemory)); 1324ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com } 133306ab9d5de38f2a547fd1d69aedbe69b5c6617ccskia.committer@gmail.com 13494e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com void writePath(const SkPath& path) { 13594e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com size_t size = path.writeToMemory(NULL); 13694e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com SkASSERT(SkAlign4(size) == size); 13794e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com path.writeToMemory(this->reserve(size)); 13894e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com } 13994e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com 1402b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com void writeMatrix(const SkMatrix& matrix) { 14194e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com size_t size = matrix.writeToMemory(NULL); 1422b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com SkASSERT(SkAlign4(size) == size); 14394e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com matrix.writeToMemory(this->reserve(size)); 1442b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com } 145fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 1462b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com void writeRegion(const SkRegion& rgn) { 14794e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com size_t size = rgn.writeToMemory(NULL); 1482b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com SkASSERT(SkAlign4(size) == size); 14994e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com rgn.writeToMemory(this->reserve(size)); 1502b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com } 1512b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com 1528a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // write count bytes (must be a multiple of 4) 1538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void writeMul4(const void* values, size_t size) { 1545b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com this->write(values, size); 1555b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com } 1565b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com 1575b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com /** 1585b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com * Write size bytes from values. size must be a multiple of 4, though 1595b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com * values need not be 4-byte aligned. 1605b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com */ 1615b3d5349bedf37ec6fcf03bac04cf33129fc176areed@google.com void write(const void* values, size_t size) { 1628a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com SkASSERT(SkAlign4(size) == size); 1638a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com memcpy(this->reserve(size), values, size); 1648a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 165fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 1665a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com /** 1675a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com * Reserve size bytes. Does not need to be 4 byte aligned. The remaining space (if any) will be 1685a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com * filled in with zeroes. 1695a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com */ 17019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org uint32_t* reservePad(size_t size) { 17119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org uint32_t* p = this->reserve(SkAlign4(size)); 17219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org uint8_t* tail = (uint8_t*)p + size; 17319382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org switch (SkAlign4(size) - size) { 17419382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org default: SkDEBUGFAIL("SkAlign4(x) - x should always be 0, 1, 2, or 3."); 17519382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org case 3: *tail++ = 0x00; // fallthrough is intentional 17619382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org case 2: *tail++ = 0x00; // fallthrough is intentional 17719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org case 1: *tail++ = 0x00; 17819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org case 0: ;/*nothing to do*/ 17919382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 18019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org return p; 18119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 1825a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com 1835a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com /** 1845a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com * Write size bytes from src, and pad to 4 byte alignment with zeroes. 1855a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com */ 18619382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void writePad(const void* src, size_t size) { 18719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org memcpy(this->reservePad(size), src, size); 18819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 189dde0956375e87027df2fdd80d430dd819c217aacreed@google.com 190dde0956375e87027df2fdd80d430dd819c217aacreed@google.com /** 191dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * Writes a string to the writer, which can be retrieved with 192dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * SkReader32::readString(). 193dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * The length can be specified, or if -1 is passed, it will be computed by 1940038c12f337b7037ef698e2723099c7e3b19c4camtklein@google.com * calling strlen(). The length must be < max size_t. 1950038c12f337b7037ef698e2723099c7e3b19c4camtklein@google.com * 1960038c12f337b7037ef698e2723099c7e3b19c4camtklein@google.com * If you write NULL, it will be read as "". 197dde0956375e87027df2fdd80d430dd819c217aacreed@google.com */ 198dde0956375e87027df2fdd80d430dd819c217aacreed@google.com void writeString(const char* str, size_t len = (size_t)-1); 199dde0956375e87027df2fdd80d430dd819c217aacreed@google.com 200dde0956375e87027df2fdd80d430dd819c217aacreed@google.com /** 201dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * Computes the size (aligned to multiple of 4) need to write the string 202dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * in a call to writeString(). If the length is not specified, it will be 203dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * computed by calling strlen(). 204dde0956375e87027df2fdd80d430dd819c217aacreed@google.com */ 205dde0956375e87027df2fdd80d430dd819c217aacreed@google.com static size_t WriteStringSize(const char* str, size_t len = (size_t)-1); 206dde0956375e87027df2fdd80d430dd819c217aacreed@google.com 2071cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com /** 2081cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com * Move the cursor back to offset bytes from the beginning. 209c6d3c444ca76feba5a8937dbc80626ade5347275commit-bot@chromium.org * offset must be a multiple of 4 no greater than size(). 2101cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com */ 21119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void rewindToOffset(size_t offset) { 21219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org SkASSERT(SkAlign4(offset) == offset); 213046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(offset <= bytesWritten()); 214046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fUsed = offset; 21519382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 2161cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com 2178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // copy into a single buffer (allocated by caller). Must be at least size() 21819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void flatten(void* dst) const { 219046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org memcpy(dst, fData, fUsed); 22019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 22119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org 22219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org bool writeToStream(SkWStream* stream) const { 223046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org return stream->write(fData, fUsed); 22419382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 225fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 2268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // read from the stream, and write up to length bytes. Return the actual 2278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // number of bytes written. 22819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org size_t readFromStream(SkStream* stream, size_t length) { 22919382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org return stream->read(this->reservePad(length), length); 2305595af1b2ebe6590e98641464d43d22281a7f295reed@google.com } 231e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com 23219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.orgprivate: 233046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org void growToAtLeast(size_t size); 2341cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com 235046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org uint8_t* fData; // Points to either fInternal or fExternal. 236046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t fCapacity; // Number of bytes we can write to fData. 237046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t fUsed; // Number of bytes written. 238046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org void* fExternal; // Unmanaged memory block. 239046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkTDArray<uint8_t> fInternal; // Managed memory block. 2408a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 2418a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 24251c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com/** 24351c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * Helper class to allocated SIZE bytes as part of the writer, and to provide 24451c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * that storage to the constructor as its initial storage buffer. 24551c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * 24651c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * This wrapper ensures proper alignment rules are met for the storage. 24751c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com */ 24851c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.comtemplate <size_t SIZE> class SkSWriter32 : public SkWriter32 { 24951c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.compublic: 25019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org SkSWriter32() : SkWriter32(fData.fStorage, SIZE) {} 251fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 25251c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.comprivate: 25351c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com union { 25451c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com void* fPtrAlignment; 25551c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com double fDoubleAlignment; 25651c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com char fStorage[SIZE]; 25751c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com } fData; 25851c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com}; 25951c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com 2608a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 261