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-/* SPDX-License-Identifier: BSD-2-Clause */
-/*
-From http://jgt.akpeters.com/papers/McGuire08/
-
-Efficient, High-Quality Bayer Demosaic Filtering on GPUs
-
-Morgan McGuire
-
-This paper appears in issue Volume 13, Number 4.
----------------------------------------------------------
-Copyright (c) 2008, Morgan McGuire. All rights reserved.
-
-Modified by Linaro Ltd to integrate it into libcamera.
-Copyright (C) 2021, Linaro
-*/
-
-//Vertex Shader
-
-attribute vec4 vertexIn;
-attribute vec2 textureIn;
-
-uniform vec2 tex_size; /* The texture size in pixels */
-uniform vec2 tex_step;
-
-/** Pixel position of the first red pixel in the */
-/** Bayer pattern. [{0,1}, {0, 1}]*/
-uniform vec2 tex_bayer_first_red;
-
-/** .xy = Pixel being sampled in the fragment shader on the range [0, 1]
- .zw = ...on the range [0, sourceSize], offset by firstRed */
-varying vec4 center;
-
-/** center.x + (-2/w, -1/w, 1/w, 2/w); These are the x-positions */
-/** of the adjacent pixels.*/
-varying vec4 xCoord;
-
-/** center.y + (-2/h, -1/h, 1/h, 2/h); These are the y-positions */
-/** of the adjacent pixels.*/
-varying vec4 yCoord;
-
-void main(void) {
- center.xy = textureIn;
- center.zw = textureIn * tex_size + tex_bayer_first_red;
-
- xCoord = center.x + vec4(-2.0 * tex_step.x,
- -tex_step.x, tex_step.x, 2.0 * tex_step.x);
- yCoord = center.y + vec4(-2.0 * tex_step.y,
- -tex_step.y, tex_step.y, 2.0 * tex_step.y);
-
- gl_Position = vertexIn;
-}