Preparation code

<script>
  var glcanvas = document.createElement('canvas');
  var gl = glcanvas.getContext('experimental-webgl');
  
  var canvas1024 = document.createElement('canvas');
  canvas1024.width = 1024;
  canvas1024.height = 1024;
  var img1024 = new Image();
  var tex1024 = gl.createTexture();
  img1024.onload = function() {
      gl.bindTexture(gl.TEXTURE_2D, tex1024);
      gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img1024);
  };
  img1024.src = canvas1024.toDataURL();
  
  var canvas512 = document.createElement('canvas');
  canvas512.width = 512;
  canvas512.height = 512;
  var img512 = new Image();
  var tex512 = gl.createTexture();
  img512.onload = function() {
      gl.bindTexture(gl.TEXTURE_2D, tex512);
      gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img512);
  };
  img512.src = canvas512.toDataURL();
  
  var canvas256 = document.createElement('canvas');
  canvas256.width = 256;
  canvas256.height = 256;
  var img256 = new Image();
  var tex256 = gl.createTexture();
  img256.onload = function() {
      gl.bindTexture(gl.TEXTURE_2D, tex256);
      gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img256);
  };
  img256.src = canvas256.toDataURL();
</script>

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gl.bindTexture(gl.TEXTURE_2D, tex1024);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img1024);

gl.bindTexture(gl.TEXTURE_2D, tex1024);
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, img1024);

gl.bindTexture(gl.TEXTURE_2D, tex512);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img512);

gl.bindTexture(gl.TEXTURE_2D, tex512);
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, img512);

gl.bindTexture(gl.TEXTURE_2D, tex256);
gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, img256);

gl.bindTexture(gl.TEXTURE_2D, tex256);
gl.texSubImage2D(gl.TEXTURE_2D, 0, 0, 0, gl.RGBA, gl.UNSIGNED_BYTE, img256);

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published by Brian Chirls on 13th July 2011
• Revision 2: published by Brandon Jones on 7th August 2011
• Revision 3: published by Carlos R. on 11th August 2011
• Revision 5: published on 24th August 2011
• Revision 6: published by Ken Russell on 8th September 2011
• Revision 7: published by Jhonny on 10th October 2011
• Revision 8: published by Michael Bebenita on 9th December 2011
• Revision 9: published on 1st April 2012

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