void ofPixels_<PixelType>::copyFrom(const ofPixels_<PixelType> & mom){ if(mom.isAllocated()) { allocate(mom.getWidth(), mom.getHeight(), mom.getNumChannels()); memcpy(pixels, mom.getPixels(), mom.getWidth() * mom.getHeight() * mom.getBytesPerPixel()); } }
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; } if(format==OF_IMAGE_FORMAT_JPEG && pix.getNumChannels()==4){ ofPixels pix3 = pix; pix3.setNumChannels(3); saveImage(pix3,buffer,format,qualityLevel); 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, const std::filesystem::path& _fileName, ofImageQualityType qualityLevel) { ofInitFreeImage(); if (_pix.isAllocated() == false){ ofLogError("ofImage") << "saveImage(): couldn't save \"" << _fileName << "\", pixels are not allocated"; return false; } ofFilePath::createEnclosingDirectory(_fileName); std::string fileName = ofToDataPath(_fileName); FREE_IMAGE_FORMAT fif = FIF_UNKNOWN; fif = FreeImage_GetFileType(fileName.c_str(), 0); if(fif == FIF_UNKNOWN) { // or guess via filename fif = FreeImage_GetFIFFromFilename(fileName.c_str()); } if(fif==FIF_JPEG && (_pix.getNumChannels()==4 || _pix.getBitsPerChannel() > 8)){ ofPixels pix3 = _pix; pix3.setNumChannels(3); return saveImage(pix3,_fileName,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 bool retValue = false; if((fif != FIF_UNKNOWN) && FreeImage_FIFSupportsReading(fif)) { if(fif == 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; } retValue = FreeImage_Save(fif, bmp, fileName.c_str(), quality); } else { if(qualityLevel != OF_IMAGE_QUALITY_BEST) { ofLogWarning("ofImage") << "saveImage(): ofImageCompressionType only applies to JPEGs," << " ignoring value for \" "<< fileName << "\""; } if (fif == FIF_GIF) { FIBITMAP* convertedBmp; if(_pix.getImageType() == OF_IMAGE_COLOR_ALPHA) { // this just converts the image to grayscale so it can save something convertedBmp = FreeImage_ConvertTo8Bits(bmp); } else { // this will create a 256-color palette from the image convertedBmp = FreeImage_ColorQuantize(bmp, FIQ_NNQUANT); } retValue = FreeImage_Save(fif, convertedBmp, fileName.c_str()); if (convertedBmp != nullptr){ FreeImage_Unload(convertedBmp); } } else { retValue = FreeImage_Save(fif, bmp, fileName.c_str()); } } } if (bmp != nullptr){ FreeImage_Unload(bmp); } return retValue; }