From 561c35c8824cd062ecc504e3d75469ea954565c2 Mon Sep 17 00:00:00 2001
From: juliandescottes <julian.descottes@gmail.com>
Date: Tue, 4 Sep 2012 08:35:58 +0200
Subject: [PATCH] Adding Frame Renderer utility

---
 js/rendering/FrameRenderer.js | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 js/rendering/FrameRenderer.js

diff --git a/js/rendering/FrameRenderer.js b/js/rendering/FrameRenderer.js
new file mode 100644
index 00000000..f5c07c54
--- /dev/null
+++ b/js/rendering/FrameRenderer.js
@@ -0,0 +1,31 @@
+(function () {
+	var ns = $.namespace("pskl.rendering");
+	ns.FrameRenderer = function () {};
+
+	ns.FrameRenderer.prototype.render = function (frame, canvas, dpi) {
+		var color;
+		for(var col = 0, num_col = frame.length; col < num_col; col++) {
+			for(var row = 0, num_row = frame[col].length; row < num_row; row++) {
+				color = frame[col][row];
+				this.drawPixelInCanvas(col, row, canvas, color, dpi);
+			}
+		}
+	};
+
+	ns.FrameRenderer.prototype.drawPixelInCanvas = function () {
+		var context = canvas.getContext('2d');
+		if(color == Constants.TRANSPARENT_COLOR) {
+			context.clearRect(col * dpi, row * dpi, dpi, dpi);   
+		} 
+		else {
+			if(color != Constants.SELECTION_TRANSPARENT_COLOR) {
+				// TODO(vincz): Found a better design to update the palette, it's called too frequently.
+				$.publish(Events.COLOR_USED, [color]);
+			}
+			context.fillStyle = color;
+			context.fillRect(col * dpi, row * dpi, dpi, dpi);
+		}
+
+	} 
+
+})();
\ No newline at end of file