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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
* Copyright (C) 2020, Linaro
*
* YUV_3_planes_UV.frag - Fragment shader code for YUV420 format
*/
#ifdef GL_ES
precision mediump float;
#endif
varying vec2 textureOut;
uniform sampler2D tex_y;
uniform sampler2D tex_u;
uniform sampler2D tex_v;
void main(void)
{
vec3 yuv;
vec3 rgb;
mat3 yuv2rgb_bt601_mat = mat3(
vec3(1.164, 1.164, 1.164),
vec3(0.000, -0.392, 2.017),
vec3(1.596, -0.813, 0.000)
);
yuv.x = texture2D(tex_y, textureOut).r - 0.063;
yuv.y = texture2D(tex_u, textureOut).r - 0.500;
yuv.z = texture2D(tex_v, textureOut).r - 0.500;
rgb = yuv2rgb_bt601_mat * yuv;
gl_FragColor = vec4(rgb, 1.0);
}
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