example2.c

#include "pbPlots.h"
#include "supportLib.h"

int main(){
	_Bool success;
	StringReference *errorMessage;

	double xs [] = {-2, -1, 0, 1, 2};
	double ys [] = {2, -1, -2, -1, 2};

	StartArenaAllocator();

	ScatterPlotSeries *series = GetDefaultScatterPlotSeriesSettings();
	series->xs = xs;
	series->xsLength = 5;
	series->ys = ys;
	series->ysLength = 5;
	series->linearInterpolation = true;
	series->lineType = L"dashed";
	series->lineTypeLength = wcslen(series->lineType);
	series->lineThickness = 2;
	series->color = GetGray(0.3);

	ScatterPlotSettings *settings = GetDefaultScatterPlotSettings();
	settings->width = 600;
	settings->height = 400;
	settings->autoBoundaries = true;
	settings->autoPadding = true;
	settings->title = L"x^2 - 2";
	settings->titleLength = wcslen(settings->title);
	settings->xLabel = L"X axis";
	settings->xLabelLength = wcslen(settings->xLabel);
	settings->yLabel = L"Y axis";
	settings->yLabelLength = wcslen(settings->yLabel);
	ScatterPlotSeries *s [] = {series};
	settings->scatterPlotSeries = s;
	settings->scatterPlotSeriesLength = 1;

	RGBABitmapImageReference *canvasReference = CreateRGBABitmapImageReference();
	errorMessage = (StringReference *)malloc(sizeof(StringReference));
	success = DrawScatterPlotFromSettings(canvasReference, settings, errorMessage);

	if(success){
		ByteArray *pngdata = ConvertToPNG(canvasReference->image);
		WriteToFile(pngdata, "example2.png");
		DeleteImage(canvasReference->image);
	}else{
		fprintf(stderr, "Error: ");
		for(int i = 0; i < errorMessage->stringLength; i++){
			fprintf(stderr, "%c", errorMessage->string[i]);
		}
		fprintf(stderr, "\n");
	}

	FreeAllocations();

	return success ? 0 : 1;
}