textblotter.js

blot: function(options) {
        var x = options.x || 0, y = options.y || 0;
        var metrics = options.metrics || this.calculateMetrics(options);
        var lineStart = options.lineStart ? options.lineStart : 0;
        var lineCount = options.lineCount ? Math.min(metrics.lines.length, options.lineCount) 
            : metrics.lines.length;
        var canvas = options.canvas || new BetterCanvas(
                padding.x * 2 + x + metrics.w - 1,
                padding.y * 2 + y + lineCount * 10
            );
        if(options.bg) canvas.fill(options.bg);
        var charCount = 0;
        for(var l = lineStart; l < Math.min(metrics.lines.length, lineStart + lineCount); l++) {
            var maxChars = metrics.lines[l].chars.length;
            if(options.maxChars) maxChars = Math.min(maxChars,options.maxChars - charCount);
            for(var c = 0; c < maxChars; c++) {
                var char = metrics.lines[l].chars[c];
                if(char.char.text == ' ') continue;
                canvas.drawImage(image, char.char.x, char.char.y, char.w, char.char.h,
                    padding.x + x + char.x, padding.y + y + (l - lineStart) * 10 + (char.oy || 0) + vertOffset, 
                    char.w, char.char.h);
            }
            charCount += metrics.lines[l].chars.length;
        }
        return canvas.canvas;
    }