// Returns:
// -4 = no preview
// -2 = load still in progress or failed
int CHexEditDoc::GetBmpInfo(CString &format, CString &bpp, CString &width, CString &height)
{
// Clear strings in case of error return
format = "";
bpp = width = height = "";
if (pthread6_ == NULL)
return -4; // no bitmap preview for this file
format = "Unknown";
// Protect access to shared data
CSingleLock sl(&docdata_, TRUE);
if (preview_dib_ == NULL)
return -2;
ASSERT(preview_fif_ != FREE_IMAGE_FORMAT(-999));
if (preview_fif_ > FIF_UNKNOWN && preview_fif_ <= FIF_RAW)
{
format = CString(format_name[int(preview_fif_)]);
bpp.Format("%d bits/pixel", preview_bpp_);
width.Format("%u pixels", preview_width_);
height.Format("%u pixels", preview_height_);
}
return 0;
}
// Returns:
// -3 = no disk file
int CHexEditDoc::GetDiskBmpInfo(CString &format, CString &bpp, CString &width, CString &height)
{
// Clear strings in case of error return
format = "Unknown";
bpp = width = height = "";
//if (pthread6_ == NULL)
// return -4; // no bitmap preview for this file
if (pfile1_ == NULL)
return -3;
// Protect access to shared data
CSingleLock sl(&docdata_, TRUE);
// If we don't have the any info on the disk bitmap
if (preview_file_fif_ == FREE_IMAGE_FORMAT(-999))
{
preview_file_fif_ = FIF_UNKNOWN;
// Wrap FreeImage stuff in try block as FreeImage_Load may have memory access violations on bad data
try
{
FIBITMAP * dib = NULL;
// Load info about bitmap from the disk file
// (Unfortunately we have to load the whole bitmap into memory to get his info.)
preview_file_fif_ = FreeImage_GetFileType(pfile1_->GetFilePath());
if (preview_file_fif_ > FIF_UNKNOWN &&
(dib = FreeImage_Load(preview_file_fif_, pfile1_->GetFilePath())) != NULL)
{
preview_file_bpp_ = FreeImage_GetBPP(dib);
preview_file_width_ = FreeImage_GetWidth(dib);
preview_file_height_ = FreeImage_GetHeight(dib);
FreeImage_Unload(dib);
}
else
preview_file_fif_ = FIF_UNKNOWN;
}
catch (...)
{
preview_file_fif_ = FIF_UNKNOWN;
}
}
if (preview_file_fif_ > FIF_UNKNOWN && preview_file_fif_ <= FIF_RAW)
{
format = CString(format_name[int(preview_file_fif_)]);
bpp.Format("%d bits/pixel", preview_file_bpp_);
width.Format("%u pixels", preview_file_width_);
height.Format("%u pixels", preview_file_height_);
}
return 0;
}
static void saveImage(ofPixels_<PixelType> & pix, ofBuffer & buffer, ofImageFormat format, ofImageQualityType qualityLevel) {
//thanks to alvaro casinelli for the implementation
ofInitFreeImage();
if (pix.isAllocated() == false){
ofLog(OF_LOG_ERROR,"error saving image - pixels aren't allocated");
return;
}
#ifdef TARGET_LITTLE_ENDIAN
if(sizeof(PixelType) == 1) {
pix.swapRgb();
}
#endif
FIBITMAP * bmp = getBmpFromPixels(pix);
#ifdef TARGET_LITTLE_ENDIAN
if(sizeof(PixelType) == 1) {
pix.swapRgb();
}
#endif
if (bmp) // bitmap successfully created
{
// (b) open a memory stream to compress the image onto mem_buffer:
//
FIMEMORY *hmem = FreeImage_OpenMemory();
// (c) encode and save the image to the memory (on dib FIBITMAP image):
//
if(FREE_IMAGE_FORMAT(format) == FIF_JPEG) {
int quality = JPEG_QUALITYSUPERB;
switch(qualityLevel) {
case OF_IMAGE_QUALITY_WORST: quality = JPEG_QUALITYBAD; break;
case OF_IMAGE_QUALITY_LOW: quality = JPEG_QUALITYAVERAGE; break;
case OF_IMAGE_QUALITY_MEDIUM: quality = JPEG_QUALITYNORMAL; break;
case OF_IMAGE_QUALITY_HIGH: quality = JPEG_QUALITYGOOD; break;
case OF_IMAGE_QUALITY_BEST: quality = JPEG_QUALITYSUPERB; break;
}
FreeImage_SaveToMemory(FIF_JPEG, bmp, hmem, quality);
}else{
FreeImage_SaveToMemory((FREE_IMAGE_FORMAT)format, bmp, hmem);
}
/*
NOTE: at this point, hmem contains the entire data in memory stored in fif format. the
amount of space used by the memory is equal to file_size:
long file_size = FreeImage_TellMemory(hmem);
but can also be retrieved by FreeImage_AcquireMemory that retrieves both the
length of the buffer, and the buffer memory address.
*/
#ifdef TARGET_WIN32
DWORD size_in_bytes = 0;
#else
uint32_t size_in_bytes = 0;
#endif
// Save compressed data on mem_buffer
// note: FreeImage_AquireMemory allocates space for aux_mem_buffer):
//
unsigned char *mem_buffer = NULL;
if (!FreeImage_AcquireMemory(hmem, &mem_buffer, &size_in_bytes))
cout << "Error aquiring compressed image from memory" << endl;
/*
Now, before closing the memory stream, copy the content of mem_buffer
to an auxiliary buffer
*/
buffer.set((char*)mem_buffer,size_in_bytes);
// Finally, close the FIBITMAP object, or we will get a memory leak:
FreeImage_Unload(bmp);
// Close the memory stream (otherwise we may get a memory leak).
FreeImage_CloseMemory(hmem);
}
}
static bool saveImage(const ofPixels_<PixelType> & _pix, ofBuffer & buffer, ofImageFormat format, ofImageQualityType qualityLevel) {
// thanks to alvaro casinelli for the implementation
ofInitFreeImage();
if (_pix.isAllocated() == false){
ofLogError("ofImage","saveImage(): couldn't save to ofBuffer, pixels are not allocated");
return false;
}
if(format==OF_IMAGE_FORMAT_JPEG && (_pix.getNumChannels()==4 || _pix.getBitsPerChannel() > 8)){
ofPixels pix3 = _pix;
pix3.setNumChannels(3);
return saveImage(pix3,buffer,format,qualityLevel);
}
FIBITMAP * bmp = nullptr;
#ifdef TARGET_LITTLE_ENDIAN
if(sizeof(PixelType) == 1 && (_pix.getPixelFormat()==OF_PIXELS_RGB || _pix.getPixelFormat()==OF_PIXELS_RGBA)) { // Make a local copy.
ofPixels_<PixelType> pix = _pix;
pix.swapRgb();
bmp = getBmpFromPixels(pix);
}else{
#endif
bmp = getBmpFromPixels(_pix);
#ifdef TARGET_LITTLE_ENDIAN
}
#endif
if (bmp) // bitmap successfully created
{
bool returnValue;
// (b) open a memory stream to compress the image onto mem_buffer:
//
FIMEMORY *hmem = FreeImage_OpenMemory();
// (c) encode and save the image to the memory (on dib FIBITMAP image):
//
if(FREE_IMAGE_FORMAT(format) == FIF_JPEG) {
int quality = JPEG_QUALITYSUPERB;
switch(qualityLevel) {
case OF_IMAGE_QUALITY_WORST: quality = JPEG_QUALITYBAD; break;
case OF_IMAGE_QUALITY_LOW: quality = JPEG_QUALITYAVERAGE; break;
case OF_IMAGE_QUALITY_MEDIUM: quality = JPEG_QUALITYNORMAL; break;
case OF_IMAGE_QUALITY_HIGH: quality = JPEG_QUALITYGOOD; break;
case OF_IMAGE_QUALITY_BEST: quality = JPEG_QUALITYSUPERB; break;
}
returnValue = FreeImage_SaveToMemory(FIF_JPEG, bmp, hmem, quality);
}else{
returnValue = FreeImage_SaveToMemory((FREE_IMAGE_FORMAT)format, bmp, hmem);
}
/*
NOTE: at this point, hmem contains the entire data in memory stored in fif format. the
amount of space used by the memory is equal to file_size:
long file_size = FreeImage_TellMemory(hmem);
but can also be retrieved by FreeImage_AcquireMemory that retrieves both the
length of the buffer, and the buffer memory address.
*/
#ifdef TARGET_WIN32
DWORD size_in_bytes = 0;
#else
std::uint32_t size_in_bytes = 0;
#endif
// Save compressed data on mem_buffer
// note: FreeImage_AquireMemory allocates space for aux_mem_buffer):
//
unsigned char *mem_buffer = nullptr;
if (!FreeImage_AcquireMemory(hmem, &mem_buffer, &size_in_bytes)){
ofLogError("ofImage") << "saveImage(): couldn't save to ofBuffer, aquiring compressed image from memory failed";
return false;
}
/*
Now, before closing the memory stream, copy the content of mem_buffer
to an auxiliary buffer
*/
buffer.set((char*)mem_buffer,size_in_bytes);
// Finally, close the FIBITMAP object, or we will get a memory leak:
FreeImage_Unload(bmp);
// Close the memory stream (otherwise we may get a memory leak).
FreeImage_CloseMemory(hmem);
return returnValue;
}else{
return false;
}
}
