Function msDrawVBarChartLayer

mapchart.c:400–462

}

int msDrawVBarChartLayer(mapObj *map, layerObj *layer, imageObj *image)
{
    shapeObj    shape;
    int         status=MS_SUCCESS;
    const char *chartSizeProcessingKey=msLayerGetProcessingKey( layer,"CHART_SIZE" );
    const char *chartScaleProcessingKey=msLayerGetProcessingKey( layer,"CHART_SCALE" );
    float barWidth,scale=1.0;
    float *values;
    styleObj **styles;
    pointObj center;
    int numvalues = layer->numclasses; 
    if(chartSizeProcessingKey==NULL)
    {
        barWidth=20;
    }
    else
    {
        if(sscanf(chartSizeProcessingKey ,"%f",&barWidth) != 1) {
            msSetError(MS_MISCERR, "msDrawChart format error for processing key \"CHART_SIZE\"", "msDrawVBarChartLayer()");
            return MS_FAILURE;
        }
    }

    if(chartScaleProcessingKey){
        if(sscanf(chartScaleProcessingKey,"%f",&scale)!=1) {
            msSetError(MS_MISCERR, "Error reading value for processing key \"CHART_SCALE\"", "msDrawVBarChartLayer()");
            return MS_FAILURE;
        }
    }
    msInitShape(&shape);

    values=(float*)calloc(numvalues,sizeof(float));
    MS_CHECK_ALLOC(values, numvalues*sizeof(float), MS_FAILURE);
    styles = (styleObj**)malloc(numvalues*sizeof(styleObj*));
    if (styles == NULL)
    {
        msSetError(MS_MEMERR, "%s: %d: Out of memory allocating %u bytes.\n", "msDrawVBarChartLayer()",
                   __FILE__, __LINE__, numvalues*sizeof(styleObj*)); 
        free(values);
        return MS_FAILURE;
    }

    while(MS_SUCCESS == getNextShape(map,layer,values,styles,&shape)) {
        int i;
        double h=0;
        for(i=0;i<numvalues;i++) {
            values[i]*=scale;
            h += values[i];
        }
        msDrawStartShape(map, layer, image, &shape);
        if(findChartPoint(map, &shape, barWidth,h, &center)==MS_SUCCESS) {
            status = msDrawVBarChart(map,image,
                &center,
                values, styles, numvalues,
                barWidth);
        }
        msDrawEndShape(map,layer,image,&shape);
        msFreeShape(&shape);