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# haxe-ui
  • o
    1+=3
  • b
    > i guess you could just set p[i] = 0xFF0000; i += 3
  • o
    did you look at what Hugh was saying about allowing direct access
  • b
    its almost identical to what im doing
  • o
    could you allow the image to be adjusted under then getData
  • b
    (i hadnt seen it though, no)
  • b
    i have no idea what that means
  • o
    since I presume that would work without layout called again
  • b
    i also dont know what that means
  • o
    #if cpp var native = nme.native.ImageBuffer.fromBitmapData(bmp); if (native!=null) { var mutablePtr = native.value.Edit(); for(i in 0...native.value.Width()*native.value.Height()) { mutablePtr.setAt(i*3,0); mutablePtr.setAt(i*3+1,255); mutablePtr.setAt(i*3+2,0); } } #end
  • o
    is this acting on the bitmap directly so the image layout rebuild is not used?
  • b
    there is no "layout" this is the wxImage raw data buffer
  • o
    I assumed it would need to re-evalute the getData and getAlpha information
  • o
    : BitmapData.getData calls getPixels which copies the contents to a byte array. If you modify the array, you will need to set it back the the image. The code to directly access the pixels is a little out of date, but it can be used - and possibly updated using the same underlying calls.
  • o
    I don't know just wondered
  • b
    thats got nothing to with wx...
  • b
    with the hx.Image.imageData you are working directly with the raw data that it currently contains in memory
  • b
    Copy code
    haxe
class Main {
    public static function main() {
        var app = new App();
        app.init();

        var frame:Frame = new Frame(null, "hxWidgets");

        frame.resize(800, 600);

        var panel = new Panel(frame);
        
        var image:Image = new Image(Resource.getBytes("haxe-logo.png"));
        image.imageData.setRGB(10, 0, 255, 0, 0);
        image.imageData.setRGB(10, 1, 0, 255, 0);
        image.imageData.setRGB(10, 2, 0, 0, 255);
        image.imageData.set(10, 3, 0xFF00FF);
        image.imageData.set(10, 4, 0xFFFF00);
        image.imageData.set(10, 5, 0x00FFFF);

        var b = new Bitmap(image);
        var bmp:StaticBitmap = new StaticBitmap(frame, b);
        
        frame.layout();
        frame.show();

        app.run();
        app.exit();
    }
}
  • o
    I am unsure on how to build an empty image of width height...
    Copy code
    Haxe
panel.bind(EventType.PAINT, function(e) {
    var dc:PaintDC = new PaintDC(panel);
    dc.background = StockBrushes.BRUSH_BLACK;
    dc.clear();
    var gc: GraphicsContext = new GraphicsContext( panel );
    gc.pen = new Pen( 0xFF0000, 3 );
    gc.brush = new Brush( 0x880000 );
    var image: hx.widgets.Image = createImage( 1024, 768 );
    var p = @:privateAccess image.imageRef.ptr.getData();
    var l = Std.int( image.width * image.height );
    var i = 0;
    while( i < l ){
        p[i++] = 0xFF;
        p[i++] = 0x00;
        p[i++] = 0x00;
    }
    gc.drawBitmap( new Bitmap( image ) );
});
    surely this should work...
    Copy code
    var image: hx.widgets.Image = createImage( 1024, 768 );
  • o
    since if null it builds it for me?
  • b
    what is "createImage"?
  • b
    var image = new Image(1024, 768)
    should work
  • o
    oh wait will try
  • b
    and creating a new image on each paint even seems a little mad... tough probably not an issue
  • o
    Copy code
    Haxe
            var dc:PaintDC = new PaintDC(panel);
            dc.background = StockBrushes.BRUSH_BLACK;
            dc.clear();
            
            var gc: GraphicsContext = new GraphicsContext( panel );

            gc.pen = new Pen( 0xFF0000, 3 );
            gc.brush = new Brush( 0x880000 );
        
            
            var image: hx.widgets.Image = new hx.widgets.Image( 1024, 768 );
            
            for( i in 0...image.width ){
                for( j in 0...image.height ){
                    image.imageData.set( i, j, 0xFF0000 );
                }
            }
            
            gc.drawBitmap( new Bitmap( image ) );
  • o
    Am I missing something? Did you check creating a blank image?
  • b
    Copy code
    haxe
        image = new Image(100, 100);
        image.imageData.clear(0xFF00FF);
        
        image.imageData.setRGB(10, 0, 255, 0, 0);
        image.imageData.setRGB(10, 1, 0, 255, 0);
        image.imageData.setRGB(10, 2, 0, 0, 255);
        image.imageData.set(10, 3, 0xFF00FF);
        image.imageData.set(10, 4, 0xFFFF00);
        image.imageData.set(10, 5, 0x00FFFF);
  • b
    why are you trying to do this on a paint event?
  • b
    if you are just trying to test, why not use my code snippet above
  • b
    this one
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