From 831b3f813210b37d82c5777d33357f467321e4c0 Mon Sep 17 00:00:00 2001 From: Andrey Konovalov Date: Tue, 22 Jun 2021 16:46:47 +0300 Subject: qcam: viewfinder_gl: Copy the shaders for RAW8 Bayer format from motmot This commit copies the shaders from: https://github.com/motmot/libcamiface/commit/e36d51580510c211afc0430141085eb7a77d811b Signed-off-by: Andrey Konovalov Acked-by: Paul Elder Acked-by: Laurent Pinchart Signed-off-by: Laurent Pinchart --- src/qcam/assets/shader/bayer_8.vert | 70 +++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 src/qcam/assets/shader/bayer_8.vert (limited to 'src/qcam/assets/shader/bayer_8.vert') diff --git a/src/qcam/assets/shader/bayer_8.vert b/src/qcam/assets/shader/bayer_8.vert new file mode 100644 index 00000000..3354860f --- /dev/null +++ b/src/qcam/assets/shader/bayer_8.vert @@ -0,0 +1,70 @@ +/* +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. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the following + disclaimer in the documentation and/or other materials provided + with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +//Vertex Shader + + +/** (w,h,1/w,1/h) */ +uniform vec4 sourceSize; + +/** Pixel position of the first red pixel in the */ +/** Bayer pattern. [{0,1}, {0, 1}]*/ +uniform vec2 firstRed; + +/** .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 = gl_MultiTexCoord0.xy; + center.zw = gl_MultiTexCoord0.xy * sourceSize.xy + firstRed; + + vec2 invSize = sourceSize.zw; + xCoord = center.x + vec4(-2.0 * invSize.x, + -invSize.x, invSize.x, 2.0 * invSize.x); + yCoord = center.y + vec4(-2.0 * invSize.y, + -invSize.y, invSize.y, 2.0 * invSize.y); + + gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex; +} -- cgit v1.2.1