So I'm trying to experiment with GUI's and ran into a brick wall here.

 

public class test_GUIScreen extends GuiScreen
{

int guiWidth = 256; //image is a 256x256 png
int guiHeight = 256;

int guiX = (width-guiWidth)/2; //centering 
int guiY = (height-guiHeight)/2;

GuiButton Test; //unused buton

@Override
public void drawScreen(int mouseX, int mouseY, float partialTicks)
{
	GL11.glColor4f(1, 1, 1, 1);
	drawDefaultBackground();
	mc.renderEngine.bindTexture(new ResourceLocation("test", "textures/gui/testtex3.png"));
	this.drawTexturedModalRect(guiX, guiY, 0, 0, guiWidth, guiHeight);
	super.drawScreen(mouseX, mouseY, partialTicks);
}

@Override
public void initGui()
{
//		buttonList.clear();
//		buttonList.add(Test = new GuiButton(0, guiX+1, guiY+2, 30, 20, "Test"));
	super.initGui();
}

@Override
protected void actionPerformed(GuiButton Button) throws IOException
{
	switch(Button.id)
	{
		case 0:
		case 1:
		case 2:
	}
	super.actionPerformed(Button);
}

@Override
protected void mouseClicked(int mouseX, int mouseY, int mouseButton) throws IOException
{
	super.mouseClicked(mouseX, mouseY, mouseButton);
}


}

 

This code is making the texture appear in the top left corner of the screen but I need it in the center . Can someone please share their insight?  :'( 

 

Is your GUI taking up the full size of the PNG file?

 

The width/height you specify are purely the size of your ACTUAL GUI within the file. So, if you have a 256x256 file, but your drawn GUI is actually only 200x200, it's the 200x200 you need to specify.

Yes, the gui is taking up the full size of the png