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src/Source/Metadata/TagConversion.cpp  view on Meta::CPAN

				return "Unknown";
			}
		}
		break;

		case TAG_COMPONENTS_CONFIGURATION:
		{
			const char *componentStrings[7] = {"", "Y", "Cb", "Cr", "R", "G", "B"};
			BYTE *pvalue = (BYTE*)FreeImage_GetTagValue(tag);
			for(DWORD i = 0; i < MIN((DWORD)4, FreeImage_GetTagCount(tag)); i++) {
				int j = pvalue[i];
				if(j > 0 && j < 7)
					buffer += componentStrings[j];
			}
			return buffer.c_str();
		}
		break;

		case TAG_COMPRESSED_BITS_PER_PIXEL:
		{
			FIRational r(tag);
			buffer = r.toString();
			if(buffer == "1")
				buffer += " bit/pixel";
			else 
				buffer += " bits/pixel";
			return buffer.c_str();
		}
		break;

		case TAG_X_RESOLUTION:
		case TAG_Y_RESOLUTION:
		case TAG_FOCAL_PLANE_X_RES:
		case TAG_FOCAL_PLANE_Y_RES:
		case TAG_BRIGHTNESS_VALUE:
		case TAG_EXPOSURE_BIAS_VALUE:
		{
			FIRational r(tag);
			buffer = r.toString();
			return buffer.c_str();
		}
		break;

		case TAG_RESOLUTION_UNIT:
		case TAG_FOCAL_PLANE_UNIT:
		{
			unsigned short resolutionUnit = *((unsigned short *)FreeImage_GetTagValue(tag));
			switch (resolutionUnit) {
				case 1:
					return "(No unit)";
				case 2:
					return "inches";
				case 3:
					return "cm";
				default:
					break;
			}
		}
		break;

		case TAG_YCBCR_POSITIONING:
		{
			unsigned short yCbCrPosition = *((unsigned short *)FreeImage_GetTagValue(tag));
			switch (yCbCrPosition) {
				case 1:
					return "Center of pixel array";
				case 2:
					return "Datum point";
				default:
					break;
			}
		} 
		break;

		case TAG_EXPOSURE_TIME:
		{
			FIRational r(tag);
			buffer = r.toString();
			buffer += " sec";
			return buffer.c_str();
		}
		break;

		case TAG_SHUTTER_SPEED_VALUE:
		{
			FIRational r(tag);
			LONG apexValue = r.longValue();
			LONG apexPower = 1 << apexValue;
			sprintf(format, "1/%d sec", (int)apexPower);
			buffer += format;
			return buffer.c_str();
		}
		break;

		case TAG_APERTURE_VALUE:
		case TAG_MAX_APERTURE_VALUE:
		{
			FIRational r(tag);
			double apertureApex = r.doubleValue();
	        double rootTwo = sqrt((double)2);
			double fStop = pow(rootTwo, apertureApex);
			sprintf(format, "F%.1f", fStop);
			buffer += format;
			return buffer.c_str();
		}
		break;

		case TAG_FNUMBER:
		{
			FIRational r(tag);
			double fnumber = r.doubleValue();
			sprintf(format, "F%.1f", fnumber);
			buffer += format;
			return buffer.c_str();
		}
		break;

		case TAG_FOCAL_LENGTH:
		{
			FIRational r(tag);
			double focalLength = r.doubleValue();