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// ==========================================================
// FreeImage 3 Test Script
//
// Design and implementation by
// - Hervé Drolon (drolon@infonie.fr)
//
// This file is part of FreeImage 3
//
// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
// THIS DISCLAIMER.
//
// Use at your own risk!
// ==========================================================
#include "TestSuite.h"
void testSaveMemIO(const char *lpszPathName) {
FIMEMORY *hmem = NULL;
// load a regular file
FREE_IMAGE_FORMAT fif = FreeImage_GetFileType(lpszPathName);
FIBITMAP *dib = FreeImage_Load(fif, lpszPathName, 0);
// open a memory handle
hmem = FreeImage_OpenMemory();
// save the file to memory
FreeImage_SaveToMemory(fif, dib, hmem, 0);
// at this point, hmem contains the entire PNG data in memory.
// the amount of space used by the memory is equal to file_size
long file_size = FreeImage_TellMemory(hmem);
printf("File size : %ld\n", file_size);
// its easy load an image from memory as well
// seek to the start of the memory stream
FreeImage_SeekMemory(hmem, 0L, SEEK_SET);
// get the file type
FREE_IMAGE_FORMAT mem_fif = FreeImage_GetFileTypeFromMemory(hmem, 0);
// load an image from the memory handle
FIBITMAP *check = FreeImage_LoadFromMemory(mem_fif, hmem, 0);
// save as a regular file
FreeImage_Save(FIF_PNG, check, "dump.png", PNG_DEFAULT);
// make sure to free the data since FreeImage_SaveToMemory
// will cause it to be malloc'd
FreeImage_CloseMemory(hmem);
FreeImage_Unload(check);
FreeImage_Unload(dib);
}
//you could also have image data in memory via some other method, and just set
//fmh.data to point to it, and set both fmh.datalen and fmh.filelen to the
//size of that data, then FreeImage_LoadFromMemory could load the image from that memory
void testLoadMemIO(const char *lpszPathName) {
struct stat buf;
int result;
// get data associated with lpszPathName
result = stat(lpszPathName, &buf);
if(result == 0) {
// allocate a memory buffer and load temporary data
BYTE *mem_buffer = (BYTE*)malloc(buf.st_size * sizeof(BYTE));
if(mem_buffer) {
FILE *stream = fopen(lpszPathName, "rb");
if(stream) {
fread(mem_buffer, sizeof(BYTE), buf.st_size, stream);
fclose(stream);
// attach the binary data to a memory stream
FIMEMORY *hmem = FreeImage_OpenMemory(mem_buffer, buf.st_size);
// get the file type
FREE_IMAGE_FORMAT fif = FreeImage_GetFileTypeFromMemory(hmem, 0);
// load an image from the memory stream
FIBITMAP *check = FreeImage_LoadFromMemory(fif, hmem, PNG_DEFAULT);
// save as a regular file
FreeImage_Save(FIF_PNG, check, "blob.png", PNG_DEFAULT);
FreeImage_Unload(check);
// close the stream
FreeImage_CloseMemory(hmem);
}
}
// user is responsible for freeing the data
free(mem_buffer);
}
}
void testAcquireMemIO(const char *lpszPathName) {
FIMEMORY *hmem = NULL;
// load a regular file
FREE_IMAGE_FORMAT fif = FreeImage_GetFileType(lpszPathName);
FIBITMAP *dib = FreeImage_Load(fif, lpszPathName, 0);
// open and allocate a memory stream
hmem = FreeImage_OpenMemory();
// save the file to memory
FreeImage_SaveToMemory(FIF_PNG, dib, hmem, PNG_DEFAULT);
FreeImage_Unload(dib);
// get the buffer from the memory stream
BYTE *mem_buffer = NULL;
DWORD size_in_bytes = 0;
FreeImage_AcquireMemory(hmem, &mem_buffer, &size_in_bytes);
// save the buffer in a file stream
FILE *stream = fopen("buffer.png", "wb");
if(stream) {
fwrite(mem_buffer, sizeof(BYTE), size_in_bytes, stream);
fclose(stream);
}
// close and free the memory stream
FreeImage_CloseMemory(hmem);
}
void testMemIO(const char *lpszPathName) {
testSaveMemIO(lpszPathName);
testLoadMemIO(lpszPathName);
testAcquireMemIO(lpszPathName);
}
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