From ae9e7fbf3a8bf45b08951b650aec3f91997fafc3 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sun, 13 Sep 2020 01:04:20 +0300 Subject: qcam: viewfinder_gl: Merge the semi-planar UV and VU shaders MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use macros to select the U and V pattern, to avoid code duplication between the two semi-planar shaders. Signed-off-by: Laurent Pinchart Reviewed-by: Niklas Söderlund --- src/qcam/assets/shader/YUV_2_planes.frag | 39 ++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/qcam/assets/shader/YUV_2_planes.frag (limited to 'src/qcam/assets/shader/YUV_2_planes.frag') diff --git a/src/qcam/assets/shader/YUV_2_planes.frag b/src/qcam/assets/shader/YUV_2_planes.frag new file mode 100644 index 00000000..125f1c85 --- /dev/null +++ b/src/qcam/assets/shader/YUV_2_planes.frag @@ -0,0 +1,39 @@ +/* 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; + +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; +#if defined(YUV_PATTERN_UV) + yuv.y = texture2D(tex_u, textureOut).r - 0.500; + yuv.z = texture2D(tex_u, textureOut).g - 0.500; +#elif defined(YUV_PATTERN_VU) + yuv.y = texture2D(tex_u, textureOut).g - 0.500; + yuv.z = texture2D(tex_u, textureOut).r - 0.500; +#else +#error Invalid pattern +#endif + + rgb = yuv2rgb_bt601_mat * yuv; + gl_FragColor = vec4(rgb, 1.0); +} -- cgit v1.2.1