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

		// destroy the metadata model
		if(tagmap) {
			for(TAGMAP::iterator i = tagmap->begin(); i != tagmap->end(); i++) {
				FITAG *tag = (*i).second;
				FreeImage_DeleteTag(tag);
			}

			delete tagmap;
			metadata->erase(model_iterator);
		}
	}

	return TRUE;
}

BOOL DLL_CALLCONV 
FreeImage_GetMetadata(FREE_IMAGE_MDMODEL model, FIBITMAP *dib, const char *key, FITAG **tag) {
	if(!dib || !key || !tag) {
		return FALSE;
	}

	TAGMAP *tagmap = NULL;
	*tag = NULL;

	// get the metadata model
	METADATAMAP *metadata = ((FREEIMAGEHEADER *)dib->data)->metadata;
	if(!(*metadata).empty()) {
		METADATAMAP::iterator model_iterator = metadata->find(model);
		if (model_iterator != metadata->end() ) {
			// this model exists : try to get the requested tag
			tagmap = model_iterator->second;
			TAGMAP::iterator tag_iterator = tagmap->find(key);
			if (tag_iterator != tagmap->end() ) {
				// get the requested tag
				*tag = tag_iterator->second;
			} 
		}
	}

	return (*tag != NULL) ? TRUE : FALSE;
}

/**
Build and set a FITAG whose type is FIDT_ASCII. 
@param model Metadata model to be filled
@param dib Image to be filled
@param key Tag key
@param value Tag value as a ASCII string
@return Returns TRUE if successful, returns FALSE otherwise
*/
BOOL DLL_CALLCONV 
FreeImage_SetMetadataKeyValue(FREE_IMAGE_MDMODEL model, FIBITMAP *dib, const char *key, const char *value) {
	if(!dib || !key || !value) {
		return FALSE;
	}
	// create a tag
	FITAG *tag = FreeImage_CreateTag();
	if(tag) {
		BOOL bSuccess = TRUE;
		// fill the tag
		DWORD tag_length = (DWORD)(strlen(value) + 1);
		bSuccess &= FreeImage_SetTagKey(tag, key);
		bSuccess &= FreeImage_SetTagLength(tag, tag_length);
		bSuccess &= FreeImage_SetTagCount(tag, tag_length);
		bSuccess &= FreeImage_SetTagType(tag, FIDT_ASCII);
		bSuccess &= FreeImage_SetTagValue(tag, value);
		if(bSuccess) {
			// set the tag
			bSuccess &= FreeImage_SetMetadata(model, dib, FreeImage_GetTagKey(tag), tag);
		}
		// delete the tag
		FreeImage_DeleteTag(tag);

		return bSuccess;
	}

	return FALSE;
}

// ----------------------------------------------------------

unsigned DLL_CALLCONV 
FreeImage_GetMetadataCount(FREE_IMAGE_MDMODEL model, FIBITMAP *dib) {
	if(!dib) {
		return FALSE;
	}

	TAGMAP *tagmap = NULL;

	// get the metadata model
	METADATAMAP *metadata = ((FREEIMAGEHEADER *)dib->data)->metadata;
	if( (*metadata).find(model) != (*metadata).end() ) {
		tagmap = (*metadata)[model];
	}
	if(!tagmap) {
		// this model, doesn't exist: return
		return 0;
	}

	// get the tag count
	return (unsigned)tagmap->size();
}

// ----------------------------------------------------------

unsigned DLL_CALLCONV
FreeImage_GetMemorySize(FIBITMAP *dib) {
	if (!dib) {
		return 0;
	}
	FREEIMAGEHEADER *header = (FREEIMAGEHEADER *)dib->data;
	BITMAPINFOHEADER *bih = FreeImage_GetInfoHeader(dib);

	BOOL header_only = !header->has_pixels || header->external_bits != NULL;
	BOOL need_masks = bih->biCompression == BI_BITFIELDS;
	unsigned width = bih->biWidth;
	unsigned height = bih->biHeight;
	unsigned bpp = bih->biBitCount;
	
	// start off with the size of the FIBITMAP structure
	size_t size = sizeof(FIBITMAP);
	
	// add sizes of FREEIMAGEHEADER, BITMAPINFOHEADER, palette and DIB data
	size += FreeImage_GetInternalImageSize(header_only, width, height, bpp, need_masks);