Function msImageCreate

maputil.c:1450–1587

* Generic function to Initalize an image object. */

 *  Generic function to Initalize an image object.
 */
imageObj *msImageCreate(int width, int height, outputFormatObj *format, 
                        char *imagepath, char *imageurl, double resolution,
                        double defresolution, colorObj *bg)
{
    imageObj *image = NULL;
    if(MS_RENDERER_PLUGIN(format)) {
        
    	image = format->vtable->createImage(width,height,format,bg);
        if (image == NULL)
        {
            msSetError(MS_MEMERR, "Unable to create new image object.", "msImageCreate()");
            return NULL;
        }

    	image->format = format;
        format->refcount++;

        image->width = width;
        image->height = height;
        image->imagepath = NULL;
        image->imageurl = NULL;
        image->tilecache = NULL;
        image->ntiles = 0;
        image->resolution = resolution;
        image->resolutionfactor = resolution/defresolution;

        if (imagepath)
            image->imagepath = msStrdup(imagepath);
        if (imageurl)
            image->imageurl = msStrdup(imageurl);

        return image;
    }
    else if( MS_RENDERER_RAWDATA(format) )
    {
        if( format->imagemode != MS_IMAGEMODE_INT16
            && format->imagemode != MS_IMAGEMODE_FLOAT32 
            && format->imagemode != MS_IMAGEMODE_BYTE )
        {
            msSetError(MS_IMGERR, 
                       "Attempt to use illegal imagemode with rawdata renderer.",
                       "msImageCreate()" );
            return NULL;
        }

        image = (imageObj *)calloc(1,sizeof(imageObj));
        if (image == NULL)
        {
            msSetError(MS_MEMERR, "Unable to create new image object.", "msImageCreate()");
            return NULL;
        }

        if( format->imagemode == MS_IMAGEMODE_INT16 )
            image->img.raw_16bit = (short *) 
                msSmallCalloc(sizeof(short),width*height*format->bands);
        else if( format->imagemode == MS_IMAGEMODE_FLOAT32 )
            image->img.raw_float = (float *) 
                msSmallCalloc(sizeof(float),width*height*format->bands);