GetPixel(x, y)

Extern
	#If LANG="cpp" Then
		Function GetColorPixel:Int(x:Int, y:Int)="diddy::getPixel"
	#Else
		Function GetColorPixel:Int(x:Int, y:Int)="diddy.getPixel"
	#End

Public

Function GetPixel:Int[](x:Int, y:Int)
	Local colorArr:Int[4]
	Local color:Int = GetColorPixel(x, y)
	'Print color
	colorArr[0] = (color Shr 16) & $ff
	colorArr[1] = (color Shr 8) & $ff
	colorArr[2] = color & $ff
	colorArr[3] = (color Shr 24) & $ff

	Return colorArr
End

var diddy = new Object();

diddy.getPixel=function(x, y){
	var tcanvas=document.getElementById("GameCanvas").getContext("2d")
	if (tcanvas==null)
		return 0;
	var img = tcanvas.getImageData(x, y, 1, 1); 
	var pix = img.data;
	return (pix[3]<<24) | (pix[0]<<16) | (pix[1]<<8) | pix[2];
};

class diddy
{
	static int getPixel(int x, int y)
	{
		ByteBuffer pixelBuffer = ByteBuffer.allocateDirect(4);
		pixelBuffer.order(ByteOrder.LITTLE_ENDIAN); 
		GL11 gl = MonkeyGame.app.graphics.gl;
		if (gl!=null) {
			gl.glReadPixels((int)x, (int)MonkeyGame.app.graphics.height - y, 1, 1, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, pixelBuffer);
			
			int red = pixelBuffer.get(0) & 0xff;
			int green = pixelBuffer.get(1) & 0xff;
			int blue = pixelBuffer.get(2) & 0xff;
			int alpha = pixelBuffer.get(3) & 0xff;
			// returning ARGB
			return (alpha<<24) | (red<<16) | (green<<8) |  blue;
		}
		return 0;
	}
}

class diddy
{
	public:

	static int getPixel(int x, int y)
	{
		unsigned char pix[4];
		glReadPixels(x, app->graphics->height-y ,1 ,1 ,GL_RGBA ,GL_UNSIGNED_BYTE ,pix);
		return (pix[3]<<24) | (pix[0]<<16) | (pix[1]<<8) |  pix[2];
	}
}

class diddy
{
	static public function getPixel(x:int, y:int):int{
		var alpha:Number = 0;
		var red:Number = 0;
		var green:Number = 0;
		var blue:Number = 0;
		
		var bmd:BitmapData = new BitmapData(1, 1);
		var matrix:Matrix = new Matrix();
		matrix.translate(-x, -y);
		bmd.draw(game.stage, matrix);
		var pixel:uint = bmd.getPixel(0, 0);

		alpha = pixel >> 24 & 0xFF;		
		red = pixel >> 16 & 0xFF;
		green = pixel >> 8 & 0xFF;
		blue = pixel & 0xFF;

		return pixel;
	}
}

Field pixel:Int[3]

Method OnRender:Int()
	If MouseDown()
		pixel = GetPixel(MouseX(), MouseY())
		Print "Red   = " + pixel[0]
		Print "Green = " + pixel[1]
		Print "Blue  = " + pixel[2]
	End
End

	static int getPixel(int x, int y)
	{
		unsigned char pix[4];
		glReadPixels(x, app->graphics->height-y ,1 ,1 ,GL_RGBA ,GL_UNSIGNED_BYTE ,pix);
		return (pix[3]<<24) | (pix[0]<<16) | (pix[1]<<8) |  pix[2];
	}

	public static int getPixel(int x, int y)
	{
		if ((x > 0 && y > 0 && x < gxtkApp.game.app.graphics.Width()) && (y < gxtkApp.game.app.graphics.Height()))
		{
			Texture2D backBufferData = new Texture2D(
				gxtkApp.game.app.graphics.device,
				gxtkApp.game.app.graphics.Width(),
				gxtkApp.game.app.graphics.Height());

			Rectangle sourceRectangle =	new Rectangle(x, y, 1, 1);

			Color[] retrievedColor = new Color[1];

			backBufferData.GetData<Color>(
				0,
				sourceRectangle,
				retrievedColor,
				0,
				1);
				
			bb_std_lang.Print("x="+x+",y="+y+" col="+retrievedColor[0].ToString());
		}
		return 0;
	}	

GraphicsDevice device = gxtkApp.game.app.graphics.device;
int w = device.PresentationParameters.BackBufferWidth;
int h = device.PresentationParameters.BackBufferHeight;

RenderTarget2D screenshot = new RenderTarget2D(device, w, h, false, SurfaceFormat.Color, DepthFormat.Depth24Stencil8); 


device.SetRenderTarget(screenshot);
gxtkApp.game.app.graphics.Flush();
device.SetRenderTarget(null);
Color[] data = new Color[w * h];
screenshot.GetData<Color>(data);
bb_std_lang.Print("x="+x+",y="+y+" col="+data[x*y].ToString());

Extern

Function GetImageColorPixel:Int(image:Surface, x:Int, y:Int)="diddy.getImagePixel"

Public

Function GetImagePixel:Int[](image:Image, x:Int, y:Int)
	Local colorArr:Int[4]

	Local color:Int = GetImageColorPixel(image.surface, x, y)

	colorArr[0] = (color Shr 16) & $ff
	colorArr[1] = (color Shr 8) & $ff
	colorArr[2] = color & $ff
	colorArr[3] = (color Shr 24) & $ff

	Return colorArr
End

diddy.getImagePixel=function(surface, x, y) {
	if (!bb_app_device.graphics.tmpCanvas) {
		bb_app_device.graphics.tmpCanvas=document.createElement( "canvas" );
	}
	var tgc=bb_app_device.graphics.tmpCanvas.getContext( "2d" );

	tgc.drawImage( surface.image , x, y, 1, 1, x, y, 1, 1);
	var imgData=tgc.getImageData( x, y , 1, 1);

	var pix = imgData.data;

	return (pix[3]<<24) | (pix[0]<<16) | (pix[1]<<8) | pix[2];
}

Extern

Function GetImageColorPixel:Int(image:Surface, x:Int, y:Int)="diddy.getImagePixel"

Public

Function GetImagePixel:Int[](image:Image, x:Int, y:Int)
	Local colorArr:Int[4]

	Local color:Int = GetImageColorPixel(image.surface, x, y)

	colorArr[0] = (color Shr 16) & $ff
	colorArr[1] = (color Shr 8) & $ff
	colorArr[2] = color & $ff
	colorArr[3] = (color Shr 24) & $ff

	Return colorArr
End

Function GrabImagePix:Void(anImage:Image)
	Local w:Int = anImage.Width()
	Local h:Int = anImage.Height()

	Local pix:Image
	Local pixel:Int[4]
	Local start% =  Millisecs()

	If w>0 And h>0 Then
		For Local i:Int = 0 Until w
			For Local j:Int = 0 Until h
				pix = anImage.GrabImage(i, j, 1, 1)
				pixel = GetImagePixel(pix, i, j)
				Print(i+","+j+" = "+ pixel[0]+","+pixel[1]+","+pixel[2]+" a="+pixel[3])
			Next
		Next
	End
	Local fin% =  Millisecs()			
	Print "Time = "+(fin-start)
End