19f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 29f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jmemmac.c 39f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 49f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Copyright (C) 1992-1997, Thomas G. Lane. 59f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This file is part of the Independent JPEG Group's software. 69f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * For conditions of distribution and use, see the accompanying README file. 79f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 89f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jmemmac.c provides an Apple Macintosh implementation of the system- 99f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * dependent portion of the JPEG memory manager. 109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * If you use jmemmac.c, then you must define USE_MAC_MEMMGR in the 129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * JPEG_INTERNALS part of jconfig.h. 139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jmemmac.c uses the Macintosh toolbox routines NewPtr and DisposePtr 159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * instead of malloc and free. It accurately determines the amount of 169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * memory available by using CompactMem. Notice that if left to its 179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * own devices, this code can chew up all available space in the 189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * application's zone, with the exception of the rather small "slop" 199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * factor computed in jpeg_mem_available(). The application can ensure 209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * that more space is left over by reducing max_memory_to_use. 219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Large images are swapped to disk using temporary files and System 7.0+'s 239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * temporary folder functionality. 249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that jmemmac.c depends on two features of MacOS that were first 269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * introduced in System 7: FindFolder and the FSSpec-based calls. 279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * If your application uses jmemmac.c and is run under System 6 or earlier, 289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and the jpeg library decides it needs a temporary file, it will abort, 299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * printing error messages about requiring System 7. (If no temporary files 309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * are created, it will run fine.) 319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * If you want to use jmemmac.c in an application that might be used with 339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * System 6 or earlier, then you should remove dependencies on FindFolder 349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and the FSSpec calls. You will need to replace FindFolder with some 359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * other mechanism for finding a place to put temporary files, and you 369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * should replace the FSSpec calls with their HFS equivalents: 379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * FSpDelete -> HDelete 399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * FSpGetFInfo -> HGetFInfo 409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * FSpCreate -> HCreate 419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * FSpOpenDF -> HOpen *** Note: not HOpenDF *** 429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * FSMakeFSSpec -> (fill in spec by hand.) 439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * (Use HOpen instead of HOpenDF. HOpen is just a glue-interface to PBHOpen, 459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * which is on all HFS macs. HOpenDF is a System 7 addition which avoids the 469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * ages-old problem of names starting with a period.) 479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Contributed by Sam Bushell (jsam@iagu.on.net) and 499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Dan Gildor (gyld@in-touch.com). 509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define JPEG_INTERNALS 539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jinclude.h" 549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jpeglib.h" 559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include "jmemsys.h" /* import the system-dependent declarations */ 569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef USE_MAC_MEMMGR /* make sure user got configuration right */ 589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project You forgot to define USE_MAC_MEMMGR in jconfig.h. /* deliberate syntax error */ 599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <Memory.h> /* we use the MacOS memory manager */ 629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <Files.h> /* we use the MacOS File stuff */ 639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <Folders.h> /* we use the MacOS HFS stuff */ 649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <Script.h> /* for smSystemScript */ 659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#include <Gestalt.h> /* we use Gestalt to test for specific functionality */ 669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */ 689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#define TEMP_FILE_NAME "JPG%03d.TMP" 699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project#endif 709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectstatic int next_file_num; /* to distinguish among several temp files */ 729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Memory allocation and freeing are controlled by the MacOS library 769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * routines NewPtr() and DisposePtr(), which allocate fixed-address 779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * storage. Unfortunately, the IJG library isn't smart enough to cope 789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * with relocatable storage. 799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void *) 829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_get_small (j_common_ptr cinfo, size_t sizeofobject) 839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return (void *) NewPtr(sizeofobject); 859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject) 899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DisposePtr((Ptr) object); 919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * "Large" objects are treated the same as "small" ones. 969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * NB: we include FAR keywords in the routine declarations simply for 979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * consistency with the rest of the IJG code; FAR should expand to empty 989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * on rational architectures like the Mac. 999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void FAR *) 1029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_get_large (j_common_ptr cinfo, size_t sizeofobject) 1039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return (void FAR *) NewPtr(sizeofobject); 1059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 1089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject) 1099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project DisposePtr((Ptr) object); 1119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This routine computes the total memory space available for allocation. 1169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(long) 1199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, 1209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long max_bytes_needed, long already_allocated) 1219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long limit = cinfo->mem->max_memory_to_use - already_allocated; 1239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long slop, mem; 1249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Don't ask for more than what application has told us we may use */ 1269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (max_bytes_needed > limit && limit > 0) 1279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project max_bytes_needed = limit; 1289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Find whether there's a big enough free block in the heap. 1299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * CompactMem tries to create a contiguous block of the requested size, 1309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and then returns the size of the largest free block (which could be 1319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * much more or much less than we asked for). 1329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * We add some slop to ensure we don't use up all available memory. 1339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project slop = max_bytes_needed / 16 + 32768L; 1359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project mem = CompactMem(max_bytes_needed + slop) - slop; 1369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (mem < 0) 1379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project mem = 0; /* sigh, couldn't even get the slop */ 1389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Don't take more than the application says we can have */ 1399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if (mem > limit && limit > 0) 1409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project mem = limit; 1419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return mem; 1429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Backing store (temporary file) management. 1479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Backing store objects are only used when the value returned by 1489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * jpeg_mem_available is less than the total space needed. You can dispense 1499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * with these routines if you have plenty of virtual memory; see jmemnobs.c. 1509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 1519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 1549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectread_backing_store (j_common_ptr cinfo, backing_store_ptr info, 1559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project void FAR * buffer_address, 1569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long file_offset, long byte_count) 1579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long bytes = byte_count; 1599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long retVal; 1609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr ) 1629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_TFILE_SEEK); 1639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project retVal = FSRead ( info->temp_file, &bytes, 1659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (unsigned char *) buffer_address ); 1669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( retVal != noErr || bytes != byte_count ) 1679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_TFILE_READ); 1689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 1729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectwrite_backing_store (j_common_ptr cinfo, backing_store_ptr info, 1739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project void FAR * buffer_address, 1749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long file_offset, long byte_count) 1759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long bytes = byte_count; 1779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long retVal; 1789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr ) 1809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_TFILE_SEEK); 1819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project retVal = FSWrite ( info->temp_file, &bytes, 1839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project (unsigned char *) buffer_address ); 1849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( retVal != noErr || bytes != byte_count ) 1859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXIT(cinfo, JERR_TFILE_WRITE); 1869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectMETHODDEF(void) 1909f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectclose_backing_store (j_common_ptr cinfo, backing_store_ptr info) 1919f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 1929f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project FSClose ( info->temp_file ); 1939f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project FSpDelete ( &(info->tempSpec) ); 1949f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 1959f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1969f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 1979f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 1989f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Initial opening of a backing-store object. 1999f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * 2009f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * This version uses FindFolder to find the Temporary Items folder, 2019f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * and puts the temporary file in there. 2029f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2039f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2049f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 2059f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, 2069f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long total_bytes_needed) 2079f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2089f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project short tmpRef, vRefNum; 2099f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long dirID; 2109f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project FInfo finderInfo; 2119f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project FSSpec theSpec; 2129f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project Str255 fName; 2139f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project OSErr osErr; 2149f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project long gestaltResponse = 0; 2159f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2169f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Check that FSSpec calls are available. */ 2179f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project osErr = Gestalt( gestaltFSAttr, &gestaltResponse ); 2189f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( ( osErr != noErr ) 2199f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project || !( gestaltResponse & (1<<gestaltHasFSSpecCalls) ) ) 2209f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required"); 2219f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* TO DO: add a proper error message to jerror.h. */ 2229f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2239f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Check that FindFolder is available. */ 2249f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project osErr = Gestalt( gestaltFindFolderAttr, &gestaltResponse ); 2259f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( ( osErr != noErr ) 2269f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project || !( gestaltResponse & (1<<gestaltFindFolderPresent) ) ) 2279f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required."); 2289f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* TO DO: add a proper error message to jerror.h. */ 2299f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2309f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project osErr = FindFolder ( kOnSystemDisk, kTemporaryFolderType, kCreateFolder, 2319f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project &vRefNum, &dirID ); 2329f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( osErr != noErr ) 2339f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXITS(cinfo, JERR_TFILE_CREATE, "- temporary items folder unavailable"); 2349f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* TO DO: Try putting the temp files somewhere else. */ 2359f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2369f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* Keep generating file names till we find one that's not in use */ 2379f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project for (;;) { 2389f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project next_file_num++; /* advance counter */ 2399f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2409f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project sprintf(info->temp_name, TEMP_FILE_NAME, next_file_num); 2419f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project strcpy ( (Ptr)fName+1, info->temp_name ); 2429f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project *fName = strlen (info->temp_name); 2439f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project osErr = FSMakeFSSpec ( vRefNum, dirID, fName, &theSpec ); 2449f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2459f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( (osErr = FSpGetFInfo ( &theSpec, &finderInfo ) ) != noErr ) 2469f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project break; 2479f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project } 2489f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2499f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project osErr = FSpCreate ( &theSpec, '????', '????', smSystemScript ); 2509f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( osErr != noErr ) 2519f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name); 2529f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2539f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project osErr = FSpOpenDF ( &theSpec, fsRdWrPerm, &(info->temp_file) ); 2549f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project if ( osErr != noErr ) 2559f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name); 2569f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2579f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project info->tempSpec = theSpec; 2589f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2599f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project info->read_backing_store = read_backing_store; 2609f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project info->write_backing_store = write_backing_store; 2619f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project info->close_backing_store = close_backing_store; 2629f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name); 2639f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2649f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2659f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2669f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project/* 2679f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * These routines take care of any system-dependent initialization and 2689f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * cleanup required. 2699f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2709f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2719f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(long) 2729f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_mem_init (j_common_ptr cinfo) 2739f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2749f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project next_file_num = 0; 2759f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2769f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* max_memory_to_use will be initialized to FreeMem()'s result; 2779f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * the calling application might later reduce it, for example 2789f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * to leave room to invoke multiple JPEG objects. 2799f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * Note that FreeMem returns the total number of free bytes; 2809f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project * it may not be possible to allocate a single block of this size. 2819f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project */ 2829f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project return FreeMem(); 2839f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 2849f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project 2859f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source ProjectGLOBAL(void) 2869f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Projectjpeg_mem_term (j_common_ptr cinfo) 2879f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project{ 2889f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project /* no work */ 2899f5d49a1588e438ae7ceabd0c94172117e3303aaThe Android Open Source Project} 290