/// <summary>
/// Render an image from a list of instructions that manipulate a 2d context of a canvas
/// </summary>
/// <param name="pngPath">Canvas output png path</param>
/// <param name="contextVariableName">Name of the 2d context variable</param>
/// <param name="script">Script to parse</param>
/// <param name="width">Canvas width</param>
/// <param name="height">Canvas height</param>
/// <param name="notProcessInstuction">List of not processed instructions</param>
/// <returns>Number of processed instructions</returns>
public static int RenderScriptWith2dContextToPng(string pngPath, string contextVariableName, string script,
int width, int height, List<string> notProcessInstuction = null)
{
int nbProcessed = 0;
using (var canvas = new Canvas(width, height))
{
var context = canvas.getContext("2d");
var instructions = script.Split(new[] { ';', '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var inst in instructions)
{
if (!inst.Contains(contextVariableName))
{
if (notProcessInstuction != null && !string.IsNullOrWhiteSpace(inst))
notProcessInstuction.Add(inst);
continue;
}
var idxAssign = inst.IndexOf('=');
if (idxAssign < 0)
{
CallFunctionFromScriptInstruction(inst, context);
}
else
{
CallAssignFromScriptInstruction(inst, context);
}
nbProcessed++;
}
canvas.SaveToPng(pngPath);
}
return nbProcessed;
}
public CanvasRenderingContext2d(Canvas canvas)
{
state.shadowBlur = 0;
state.shadowOffsetX = 0;
state.shadowOffsetY = 0;
state.globalAlpha = 1;
state.fillColor = new Color(0, 0, 0, 1);
state.strokeColor = new Color(0, 0, 0, 1);
state.patternQuality = Cairo.Filter.Good;
state.textDrawingMode = "path";
canvas.Context.Antialias = Antialias.Subpixel;
this.canvas = canvas;
}
