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src/Source/FreeImage/PluginRAW.cpp  view on Meta::CPAN

			for(unsigned y = 0; y < height; y++) {
				FIRGB16 *output = (FIRGB16*)FreeImage_GetScanLine(dib, height - 1 - y);
				for(unsigned x = 0; x < width; x++) {
					output[x].red   = raw_data[0];
					output[x].green = raw_data[1];
					output[x].blue  = raw_data[2];
					raw_data += 3;
				}
			}
		} else if(bpp == 8) {
			// allocate output dib
			dib = FreeImage_AllocateT(FIT_BITMAP, width, height, 24);
			if(!dib) {
				throw FI_MSG_ERROR_DIB_MEMORY;
			}
			// write data
			BYTE *raw_data = (BYTE*)image->data;
			for(unsigned y = 0; y < height; y++) {
				RGBTRIPLE *output = (RGBTRIPLE*)FreeImage_GetScanLine(dib, height - 1 - y);
				for(unsigned x = 0; x < width; x++) {
					output[x].rgbtRed   = raw_data[0];
					output[x].rgbtGreen = raw_data[1];
					output[x].rgbtBlue  = raw_data[2];
					raw_data += 3;
				}
			}
		}
		
		return dib;

	} catch(const char *text) {
		FreeImage_Unload(dib);
		FreeImage_OutputMessageProc(s_format_id, text);
		return NULL;
	}
}

/** 
Get the embedded JPEG preview image from RAW picture with included Exif Data. 
@param RawProcessor Libraw handle
@param flags JPEG load flags
@return Returns the loaded dib if successfull, returns NULL otherwise
*/
static FIBITMAP * 
libraw_LoadEmbeddedPreview(LibRaw *RawProcessor, int flags) {
	FIBITMAP *dib = NULL;
	libraw_processed_image_t *thumb_image = NULL;
	
	try {
		// unpack data
		if(RawProcessor->unpack_thumb() != LIBRAW_SUCCESS) {
			// run silently "LibRaw : failed to run unpack_thumb"
			return NULL;
		}

		// retrieve thumb image
		int error_code = 0;
		thumb_image = RawProcessor->dcraw_make_mem_thumb(&error_code);
		if(thumb_image) {
			if(thumb_image->type != LIBRAW_IMAGE_BITMAP) {
				// attach the binary data to a memory stream
				FIMEMORY *hmem = FreeImage_OpenMemory((BYTE*)thumb_image->data, (DWORD)thumb_image->data_size);
				// get the file type
				FREE_IMAGE_FORMAT fif = FreeImage_GetFileTypeFromMemory(hmem, 0);
				if(fif == FIF_JPEG) {
					// rotate according to Exif orientation
					flags |= JPEG_EXIFROTATE;
				}
				// load an image from the memory stream
				dib = FreeImage_LoadFromMemory(fif, hmem, flags);
				// close the stream
				FreeImage_CloseMemory(hmem);
			} else if((flags & FIF_LOAD_NOPIXELS) != FIF_LOAD_NOPIXELS) {
				// convert processed data to output dib
				dib = libraw_ConvertProcessedImageToDib(thumb_image);
			}
		} else {
			throw "LibRaw : failed to run dcraw_make_mem_thumb";
		}

		// clean-up and return
		RawProcessor->dcraw_clear_mem(thumb_image);

		return dib;

	} catch(const char *text) {
		// clean-up and return
		if(thumb_image) {
			RawProcessor->dcraw_clear_mem(thumb_image);
		}
		if(text != NULL) {
			FreeImage_OutputMessageProc(s_format_id, text);
		}
	}

	return NULL;
}
/**
Load raw data and convert to FIBITMAP
@param RawProcessor Libraw handle
@param bitspersample Output bitdepth (8- or 16-bit)
@return Returns the loaded dib if successfull, returns NULL otherwise
*/
static FIBITMAP * 
libraw_LoadRawData(LibRaw *RawProcessor, int bitspersample) {
	FIBITMAP *dib = NULL;

	try {
		// set decoding parameters
		// -----------------------
		
		// (-6) 16-bit or 8-bit
		RawProcessor->imgdata.params.output_bps = bitspersample;
		// (-g power toe_slope)
		if(bitspersample == 16) {
			// set -g 1 1 for linear curve
			RawProcessor->imgdata.params.gamm[0] = 1;
			RawProcessor->imgdata.params.gamm[1] = 1;
		} else if(bitspersample == 8) {
			// by default settings for rec. BT.709 are used: power 2.222 (i.e. gamm[0]=1/2.222) and slope 4.5
			RawProcessor->imgdata.params.gamm[0] = 1/2.222;