Windowed Mode: GetPixels is wrong in different resolutions

I'm doing a simple getpixels in a certain area of a texture, and it's pulling the wrong locations depending on your desktop's resolution.

I am hard setting my canvas resolution in Index AND UI canvas to 1280x720.

Using the below code, I'm capturing the screen to a texture, and then in another texture, I'm cutting it up.

If my Windows Resolution is set different, I get different results. Anyway to resolve this issue?

I'm not using fullscreen whatsoever, it's just a hardcoded 1280x720 canvas which should be 1280x720 in every single Desktop resolution. Even if the aspect is the same, but the desktop resos are different, it will also give mixed results.

texture = ScreenCapture.CaptureScreenshotAsTexture(1);
//move to the right 370, up 22, grab a square of 540x675
Color[] c = texture.GetPixels (370, 22, 540,675);
Texture2D m2Texture = new Texture2D (540, 675);

m2Texture.SetPixels (c);
m2Texture.Apply ();

byte[] textureBytes = m2Texture.EncodeToPNG();

 

Unity is ninja adding a width/height to <canvas> even tho I hardcoded "canvas" and "#unity-canvas" to 1280x720

Just need to figure out how to remove that

 

config.devicePixelRatio = 1; fixes this issue in index.html

 

If Devicepixelratio isn't in your index file, cropping textures with rect will NEVER work correctly on desktop webgl.

Along the same lines of cropping textures, the below code uses too much memory in WebGL 1.0 Safari mobile and crashes (setpixels/getpixels). Desktop Webgl has no problems, since we aren't limited to like 500mb of ram like mobile safari. Destroying and Resetting textures doesn't make a difference as well. Full Screen screenshots are the only way on mobile webgl at the moment. I've been riding my memory usage in the profile pretty tight, so I'm well aware of the awful memory limitations in safari mobile. The webgl 1.0 limitation on safari mobile is really affecting my lighting/reflections really bad and it's insanely stressful as well. I could sit here and complain to you for hours about safari mobile, and how it's been holding Unity WebGL back for going on 10 years now since webplayer was deprecated.

Quote me if your pals ever have a meeting with them, because I'm pretty pissed about it, and have been for a LONG time.

//texture = ScreenCapture.CaptureScreenshotAsTexture(1);
//Texture2D m2Texture = new Texture2D (540, 675);
//Color[] c = texture.GetPixels (370, 22, 540,675);
//m2Texture.SetPixels (c);
//m2Texture.Apply ();
//byte[] textureBytes = m2Texture.EncodeToPNG();