1ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 2a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org/* 3ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com * Copyright 2010 The Android Open Source Project 4a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org * 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. 7a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org */ 8a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 9ec3ed6a5ebf6f2c406d7bcf94b6bc34fcaeb976eepoger@google.com 10314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com#include "SkData.h" 11a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org#include "SkFlate.h" 12a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org#include "SkStream.h" 13a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 14fffb2f1bda1982d451bc249743b8cc414995d6a8justinlin@google.com#ifndef SK_HAS_ZLIB 15a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.orgbool SkFlate::HaveFlate() { return false; } 167453d0e450917209871c7ea54132bb5c18c7e2d3reed@google.combool SkFlate::Deflate(SkStream*, SkWStream*) { return false; } 17b14ef7315afafc5082791b7c49213ef99f3275cbepoger@google.combool SkFlate::Deflate(const void*, size_t, SkWStream*) { return false; } 18b14ef7315afafc5082791b7c49213ef99f3275cbepoger@google.combool SkFlate::Deflate(const SkData*, SkWStream*) { return false; } 197453d0e450917209871c7ea54132bb5c18c7e2d3reed@google.combool SkFlate::Inflate(SkStream*, SkWStream*) { return false; } 20a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org#else 21a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 22a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org// static 23a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.orgbool SkFlate::HaveFlate() { 24a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org return true; 25a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org} 26a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 27a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.orgnamespace { 28a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 29fffb2f1bda1982d451bc249743b8cc414995d6a8justinlin@google.com#ifdef SK_SYSTEM_ZLIB 30fffb2f1bda1982d451bc249743b8cc414995d6a8justinlin@google.com#include <zlib.h> 31fffb2f1bda1982d451bc249743b8cc414995d6a8justinlin@google.com#else 32a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org#include SK_ZLIB_INCLUDE 33fffb2f1bda1982d451bc249743b8cc414995d6a8justinlin@google.com#endif 34a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 35c7a38f38c938a9828af0a53040e3f27079c67da5vandebo@chromium.org// static 36c7a38f38c938a9828af0a53040e3f27079c67da5vandebo@chromium.orgconst size_t kBufferSize = 1024; 37c7a38f38c938a9828af0a53040e3f27079c67da5vandebo@chromium.org 387453d0e450917209871c7ea54132bb5c18c7e2d3reed@google.combool doFlate(bool compress, SkStream* src, SkWStream* dst) { 39a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org uint8_t inputBuffer[kBufferSize]; 40a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org uint8_t outputBuffer[kBufferSize]; 41a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org z_stream flateData; 42a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.zalloc = NULL; 43a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.zfree = NULL; 44a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.next_in = NULL; 45a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.avail_in = 0; 46a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.next_out = outputBuffer; 47a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.avail_out = kBufferSize; 48a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org int rc; 49a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (compress) 50a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = deflateInit(&flateData, Z_DEFAULT_COMPRESSION); 51a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org else 52a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = inflateInit(&flateData); 53a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (rc != Z_OK) 54a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org return false; 55a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 56a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org uint8_t* input = (uint8_t*)src->getMemoryBase(); 57a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org size_t inputLength = src->getLength(); 58ee34e35c8cefb5b384b34e4eb5ef8cb82774e5a0vandebo@chromium.org if (input == NULL || inputLength == 0) { 59a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org input = NULL; 60a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.next_in = inputBuffer; 61a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.avail_in = 0; 62a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } else { 63a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.next_in = input; 647fa2a65c0cfc714364490cb715171461143024e0reed@google.com flateData.avail_in = SkToUInt(inputLength); 65a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } 66a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 67a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = Z_OK; 68a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org while (true) { 69a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (flateData.avail_out < kBufferSize) { 70a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (!dst->write(outputBuffer, kBufferSize - flateData.avail_out)) { 71a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = Z_BUF_ERROR; 72a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org break; 73a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } 74a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.next_out = outputBuffer; 75a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.avail_out = kBufferSize; 76a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } 77ee34e35c8cefb5b384b34e4eb5ef8cb82774e5a0vandebo@chromium.org if (rc != Z_OK) 78ee34e35c8cefb5b384b34e4eb5ef8cb82774e5a0vandebo@chromium.org break; 79a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (flateData.avail_in == 0) { 80a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (input != NULL) 81a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org break; 82a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org size_t read = src->read(&inputBuffer, kBufferSize); 83a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (read == 0) 84a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org break; 85a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.next_in = inputBuffer; 867fa2a65c0cfc714364490cb715171461143024e0reed@google.com flateData.avail_in = SkToUInt(read); 87a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } 88a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (compress) 89a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = deflate(&flateData, Z_NO_FLUSH); 90a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org else 91a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = inflate(&flateData, Z_NO_FLUSH); 92a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } 93a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org while (rc == Z_OK) { 94a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (compress) 95a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = deflate(&flateData, Z_FINISH); 96a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org else 97a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org rc = inflate(&flateData, Z_FINISH); 98ee34e35c8cefb5b384b34e4eb5ef8cb82774e5a0vandebo@chromium.org if (flateData.avail_out < kBufferSize) { 99a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (!dst->write(outputBuffer, kBufferSize - flateData.avail_out)) 100a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org return false; 101a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.next_out = outputBuffer; 102a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org flateData.avail_out = kBufferSize; 103a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } 104a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org } 105a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 106a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (compress) 107a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org deflateEnd(&flateData); 108a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org else 109a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org inflateEnd(&flateData); 110a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org if (rc == Z_STREAM_END) 111a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org return true; 112a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org return false; 113a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org} 114a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 115a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org} 116a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 117a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org// static 1187453d0e450917209871c7ea54132bb5c18c7e2d3reed@google.combool SkFlate::Deflate(SkStream* src, SkWStream* dst) { 119c7a38f38c938a9828af0a53040e3f27079c67da5vandebo@chromium.org return doFlate(true, src, dst); 120a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org} 121a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 122314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.combool SkFlate::Deflate(const void* ptr, size_t len, SkWStream* dst) { 123314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com SkMemoryStream stream(ptr, len); 124314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com return doFlate(true, &stream, dst); 125314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com} 126314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com 127314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.combool SkFlate::Deflate(const SkData* data, SkWStream* dst) { 128314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com if (data) { 129314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com SkMemoryStream stream(data->data(), data->size()); 130314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com return doFlate(true, &stream, dst); 131314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com } 132314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com return false; 133314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com} 134314e9b3ba0b950b99e4d11e3302933014c35c3edreed@google.com 135a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org// static 1367453d0e450917209871c7ea54132bb5c18c7e2d3reed@google.combool SkFlate::Inflate(SkStream* src, SkWStream* dst) { 137c7a38f38c938a9828af0a53040e3f27079c67da5vandebo@chromium.org return doFlate(false, src, dst); 138a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org} 139a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org 140a09ef977b6799f01cd3fd64725fb3069da8be4bcvandebo@chromium.org#endif 141