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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Linaro
*
* YUV_2_planes.frag - Fragment shader code for NV12, NV16 and NV24 formats
*/
#ifdef GL_ES
precision mediump float;
#endif
varying vec2 textureOut;
uniform sampler2D tex_y;
uniform sampler2D tex_u;
const mat3 yuv2rgb_matrix = mat3(
YUV2RGB_MATRIX
);
const vec3 yuv2rgb_offset = vec3(
YUV2RGB_Y_OFFSET / 255.0, 128.0 / 255.0, 128.0 / 255.0
);
void main(void)
{
vec3 yuv;
yuv.x = texture2D(tex_y, textureOut).r;
#if defined(YUV_PATTERN_UV)
yuv.y = texture2D(tex_u, textureOut).r;
yuv.z = texture2D(tex_u, textureOut).a;
#elif defined(YUV_PATTERN_VU)
yuv.y = texture2D(tex_u, textureOut).a;
yuv.z = texture2D(tex_u, textureOut).r;
#else
#error Invalid pattern
#endif
vec3 rgb = yuv2rgb_matrix * (yuv - yuv2rgb_offset);
gl_FragColor = vec4(rgb, 1.0);
}
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