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 13f3c15b7cfc4eed2528f7db87ea6c1444b55ee856bungeman#include "../private/SkTemplates.h" 14c30dcb9b128887c7e16afe32fdf35105cc42380bcommit-bot@chromium.org#include "SkData.h" 1519382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkMatrix.h" 1694e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com#include "SkPath.h" 178a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#include "SkPoint.h" 184123d0ff867f41c40fd288b31f4c976069753cccJim Van Verth#include "SkPoint3.h" 194ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com#include "SkRRect.h" 2019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkRect.h" 212b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com#include "SkRegion.h" 2219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkScalar.h" 2319382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkStream.h" 2419382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org#include "SkTypes.h" 258a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 263f547cb6a7fcb86d01e063b99c2d8b79d356e87fbsalomonclass SK_API SkWriter32 : SkNoncopyable { 278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.compublic: 28e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com /** 29e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com * The caller can specify an initial block of storage, which the caller manages. 3019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * 3119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * SkWriter32 will try to back reserve and write calls with this external storage until the 3219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * first time an allocation doesn't fit. From then it will use dynamically allocated storage. 3319382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org * This used to be optional behavior, but pipe now relies on it. 34e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com */ 35a93a14a99816d25b773f0b12868143702baf44bfBen Wagner SkWriter32(void* external = nullptr, size_t externalBytes = 0) { 3619382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org this->reset(external, externalBytes); 3719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 388a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 391cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com // return the current offset (will always be a multiple of 4) 40046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t bytesWritten() const { return fUsed; } 414469938e92d779dff05e745559e67907bbf21e78reed@google.com 424469938e92d779dff05e745559e67907bbf21e78reed@google.com SK_ATTR_DEPRECATED("use bytesWritten") 43adacc7067ad617cdc7bbef39192ca80f4b4d27f9robertphillips@google.com size_t size() const { return this->bytesWritten(); } 441cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com 45a93a14a99816d25b773f0b12868143702baf44bfBen Wagner void reset(void* external = nullptr, size_t externalBytes = 0) { 4619382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org SkASSERT(SkIsAlign4((uintptr_t)external)); 4719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org SkASSERT(SkIsAlign4(externalBytes)); 48046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org 49046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fData = (uint8_t*)external; 50046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fCapacity = externalBytes; 51046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fUsed = 0; 52046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fExternal = external; 53ff36a1d07f23f2b7feddaba110d448073a96f83ccommit-bot@chromium.org } 54ff36a1d07f23f2b7feddaba110d448073a96f83ccommit-bot@chromium.org 555595af1b2ebe6590e98641464d43d22281a7f295reed@google.com // size MUST be multiple of 4 565595af1b2ebe6590e98641464d43d22281a7f295reed@google.com uint32_t* reserve(size_t size) { 575595af1b2ebe6590e98641464d43d22281a7f295reed@google.com SkASSERT(SkAlign4(size) == size); 58046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t offset = fUsed; 59046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org size_t totalRequired = fUsed + size; 60046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org if (totalRequired > fCapacity) { 61a87b21cd0041bac0d96b6836ac6e71a2dbcd4e10commit-bot@chromium.org this->growToAtLeast(totalRequired); 6219382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 63046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fUsed = totalRequired; 64046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org return (uint32_t*)(fData + offset); 6519382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 66b89a03c890668f98d9f8b269b6ad00824409435bskia.committer@gmail.com 67536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org /** 68536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org * Read a T record at offset, which must be a multiple of 4. Only legal if the record 69c30dcb9b128887c7e16afe32fdf35105cc42380bcommit-bot@chromium.org * was written atomically using the write methods below. 70536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org */ 71536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org template<typename T> 72536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org const T& readTAt(size_t offset) const { 73046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(SkAlign4(offset) == offset); 74046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(offset < fUsed); 75536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org return *(T*)(fData + offset); 76046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org } 77046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org 78536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org /** 79536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org * Overwrite a T record at offset, which must be a multiple of 4. Only legal if the record 80c30dcb9b128887c7e16afe32fdf35105cc42380bcommit-bot@chromium.org * was written atomically using the write methods below. 81536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org */ 82536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org template<typename T> 83536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org void overwriteTAt(size_t offset, const T& value) { 84046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(SkAlign4(offset) == offset); 85046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(offset < fUsed); 86536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org *(T*)(fData + offset) = value; 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 1224123d0ff867f41c40fd288b31f4c976069753cccJim Van Verth void writePoint3(const SkPoint3& pt) { 1234123d0ff867f41c40fd288b31f4c976069753cccJim Van Verth *(SkPoint3*)this->reserve(sizeof(pt)) = pt; 1244123d0ff867f41c40fd288b31f4c976069753cccJim Van Verth } 1254123d0ff867f41c40fd288b31f4c976069753cccJim Van Verth 1268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com void writeRect(const SkRect& rect) { 1278a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com *(SkRect*)this->reserve(sizeof(rect)) = rect; 1288a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com } 129306ab9d5de38f2a547fd1d69aedbe69b5c6617ccskia.committer@gmail.com 1305587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com void writeIRect(const SkIRect& rect) { 1315587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com *(SkIRect*)this->reserve(sizeof(rect)) = rect; 1325587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com } 1335587ac09beec4c056332504f3fa85990520b43fddjsollen@google.com 1344ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com void writeRRect(const SkRRect& rrect) { 1354ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com rrect.writeToMemory(this->reserve(SkRRect::kSizeInMemory)); 1364ed0fb768409bf97b79899c3990d8c15f5e9d784reed@google.com } 137306ab9d5de38f2a547fd1d69aedbe69b5c6617ccskia.committer@gmail.com 13894e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com void writePath(const SkPath& path) { 139a93a14a99816d25b773f0b12868143702baf44bfBen Wagner size_t size = path.writeToMemory(nullptr); 14094e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com SkASSERT(SkAlign4(size) == size); 14194e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com path.writeToMemory(this->reserve(size)); 14294e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com } 14394e75ee46a569cbcdf61fb7f04ee3a69d3ca0896djsollen@google.com 1446d6d603c812a6c9bb3e70157be909d355233ba6dCary Clark void writeMatrix(const SkMatrix& matrix); 145fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 1462b2ede3e713065e1bac461787b0aafb03eaf871fdjsollen@google.com void writeRegion(const SkRegion& rgn) { 147a93a14a99816d25b773f0b12868143702baf44bfBen Wagner size_t size = rgn.writeToMemory(nullptr); 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); 163e0021c0b05e78e12cd58727e770f28a45a848bb4mtklein sk_careful_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) { 171536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org size_t alignedSize = SkAlign4(size); 172536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org uint32_t* p = this->reserve(alignedSize); 173536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org if (alignedSize != size) { 174536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org SkASSERT(alignedSize >= 4); 175536ac5e20c2ec2008993c0677ba8cbc5ae0f34cfcommit-bot@chromium.org p[alignedSize / 4 - 1] = 0; 17619382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 17719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org return p; 17819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 1795a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com 1805a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com /** 1815a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com * Write size bytes from src, and pad to 4 byte alignment with zeroes. 1825a7c6be72b940dde8ff6ad2485a09aecd56a2660scroggo@google.com */ 18319382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void writePad(const void* src, size_t size) { 184cff15aa36d750bc84bd6a48a66c9969f57476decmtklein sk_careful_memcpy(this->reservePad(size), src, size); 18519382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 186dde0956375e87027df2fdd80d430dd819c217aacreed@google.com 187dde0956375e87027df2fdd80d430dd819c217aacreed@google.com /** 188dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * Writes a string to the writer, which can be retrieved with 189dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * SkReader32::readString(). 190dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * The length can be specified, or if -1 is passed, it will be computed by 1910038c12f337b7037ef698e2723099c7e3b19c4camtklein@google.com * calling strlen(). The length must be < max size_t. 1920038c12f337b7037ef698e2723099c7e3b19c4camtklein@google.com * 1930038c12f337b7037ef698e2723099c7e3b19c4camtklein@google.com * If you write NULL, it will be read as "". 194dde0956375e87027df2fdd80d430dd819c217aacreed@google.com */ 195dde0956375e87027df2fdd80d430dd819c217aacreed@google.com void writeString(const char* str, size_t len = (size_t)-1); 196dde0956375e87027df2fdd80d430dd819c217aacreed@google.com 197dde0956375e87027df2fdd80d430dd819c217aacreed@google.com /** 198dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * Computes the size (aligned to multiple of 4) need to write the string 199dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * in a call to writeString(). If the length is not specified, it will be 200dde0956375e87027df2fdd80d430dd819c217aacreed@google.com * computed by calling strlen(). 201dde0956375e87027df2fdd80d430dd819c217aacreed@google.com */ 202dde0956375e87027df2fdd80d430dd819c217aacreed@google.com static size_t WriteStringSize(const char* str, size_t len = (size_t)-1); 203dde0956375e87027df2fdd80d430dd819c217aacreed@google.com 204f70b531daaf47db1ee95c70da9843f1dd1f418d3reed void writeData(const SkData* data) { 205f70b531daaf47db1ee95c70da9843f1dd1f418d3reed uint32_t len = data ? SkToU32(data->size()) : 0; 206f70b531daaf47db1ee95c70da9843f1dd1f418d3reed this->write32(len); 207f70b531daaf47db1ee95c70da9843f1dd1f418d3reed if (data) { 208f70b531daaf47db1ee95c70da9843f1dd1f418d3reed this->writePad(data->data(), len); 209f70b531daaf47db1ee95c70da9843f1dd1f418d3reed } 210f70b531daaf47db1ee95c70da9843f1dd1f418d3reed } 211f70b531daaf47db1ee95c70da9843f1dd1f418d3reed 212f70b531daaf47db1ee95c70da9843f1dd1f418d3reed static size_t WriteDataSize(const SkData* data) { 213f70b531daaf47db1ee95c70da9843f1dd1f418d3reed return 4 + SkAlign4(data ? data->size() : 0); 214f70b531daaf47db1ee95c70da9843f1dd1f418d3reed } 215f70b531daaf47db1ee95c70da9843f1dd1f418d3reed 2161cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com /** 2171cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com * Move the cursor back to offset bytes from the beginning. 218c6d3c444ca76feba5a8937dbc80626ade5347275commit-bot@chromium.org * offset must be a multiple of 4 no greater than size(). 2191cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com */ 22019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void rewindToOffset(size_t offset) { 22119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org SkASSERT(SkAlign4(offset) == offset); 222046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org SkASSERT(offset <= bytesWritten()); 223046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org fUsed = offset; 22419382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 2251cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com 2268a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // copy into a single buffer (allocated by caller). Must be at least size() 22719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org void flatten(void* dst) const { 228046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org memcpy(dst, fData, fUsed); 22919382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 23019382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org 23119382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org bool writeToStream(SkWStream* stream) const { 232046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org return stream->write(fData, fUsed); 23319382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org } 234fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 2358a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // read from the stream, and write up to length bytes. Return the actual 2368a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com // number of bytes written. 23719382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org size_t readFromStream(SkStream* stream, size_t length) { 23819382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.org return stream->read(this->reservePad(length), length); 2395595af1b2ebe6590e98641464d43d22281a7f295reed@google.com } 240e49aca968ca27d90ca919a972a86839ecaf1224areed@google.com 241c30dcb9b128887c7e16afe32fdf35105cc42380bcommit-bot@chromium.org /** 242c30dcb9b128887c7e16afe32fdf35105cc42380bcommit-bot@chromium.org * Captures a snapshot of the data as it is right now, and return it. 243c30dcb9b128887c7e16afe32fdf35105cc42380bcommit-bot@chromium.org */ 244fde05114e6c4107b36e1aa571c64d31def40f613reed sk_sp<SkData> snapshotAsData() const; 24519382421b916aab00be7265815ba4e2690adf2c9commit-bot@chromium.orgprivate: 246046f1f6ff4b2b3f4571a9562e74f41e82419a4a1commit-bot@chromium.org void growToAtLeast(size_t size); 2471cf58d03a87e1ff17cd47e9de3da4c678456618dreed@google.com 248ca21a00c736d05686c84ab874ce6a49008da6a76commit-bot@chromium.org uint8_t* fData; // Points to either fInternal or fExternal. 249ca21a00c736d05686c84ab874ce6a49008da6a76commit-bot@chromium.org size_t fCapacity; // Number of bytes we can write to fData. 250ca21a00c736d05686c84ab874ce6a49008da6a76commit-bot@chromium.org size_t fUsed; // Number of bytes written. 251ca21a00c736d05686c84ab874ce6a49008da6a76commit-bot@chromium.org void* fExternal; // Unmanaged memory block. 252ca21a00c736d05686c84ab874ce6a49008da6a76commit-bot@chromium.org SkAutoTMalloc<uint8_t> fInternal; // Managed memory block. 2538a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com}; 2548a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com 25551c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com/** 25651c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * Helper class to allocated SIZE bytes as part of the writer, and to provide 25751c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * that storage to the constructor as its initial storage buffer. 25851c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * 25951c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com * This wrapper ensures proper alignment rules are met for the storage. 26051c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com */ 26151c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.comtemplate <size_t SIZE> class SkSWriter32 : public SkWriter32 { 26251c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.compublic: 263a87b21cd0041bac0d96b6836ac6e71a2dbcd4e10commit-bot@chromium.org SkSWriter32() { this->reset(); } 264a87b21cd0041bac0d96b6836ac6e71a2dbcd4e10commit-bot@chromium.org 265a87b21cd0041bac0d96b6836ac6e71a2dbcd4e10commit-bot@chromium.org void reset() {this->INHERITED::reset(fData.fStorage, SIZE); } 266fbfcd5602128ec010c82cb733c9cdc0a3254f9f3rmistry@google.com 26751c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.comprivate: 26851c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com union { 26951c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com void* fPtrAlignment; 27051c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com double fDoubleAlignment; 27151c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com char fStorage[SIZE]; 27251c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com } fData; 273a87b21cd0041bac0d96b6836ac6e71a2dbcd4e10commit-bot@chromium.org 274a87b21cd0041bac0d96b6836ac6e71a2dbcd4e10commit-bot@chromium.org typedef SkWriter32 INHERITED; 27551c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com}; 27651c62a6cfadc302bb65bb5a98e358c93223dc73freed@google.com 2778a1c16ff38322f0210116fa7293eb8817c7e477ereed@android.com#endif 278