gstreamer/ext/vulkan/shaders/view_convert.frag

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/* GStreamer
* Copyright (C) 2020 Matthew Waters <matthew@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
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#version 450 core
#include "view_defines.h"
#include "swizzle.glsl"
layout(location = 0) in vec2 inTexCoord;
layout(set = 0, binding = 0) uniform ViewConvert {
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ivec4 in_reorder_idx;
ivec4 out_reorder_idx;
vec4 tex_offset;
vec4 tex_scale;
ivec2 tex_size;
int output_type;
mat3 downmix[2];
};
layout(set = 0, binding = 1) uniform sampler2D l_tex;
layout(set = 0, binding = 2) uniform sampler2D r_tex;
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layout(location = 0) out vec4 outColor0;
void main()
{
vec2 l_coord = inTexCoord * tex_scale.xy + tex_offset.xy;
vec2 r_coord = inTexCoord * tex_scale.zw + tex_offset.zw;
vec4 l = swizzle(texture(l_tex, l_coord), in_reorder_idx);
vec4 r = swizzle(texture(r_tex, r_coord), in_reorder_idx);
if (output_type == VIEW_MONO_DOWNMIX) {
vec3 lcol = l.rgb * l.a + vec3(1.0-l.a);
vec3 rcol = r.rgb * r.a + vec3(1.0-r.a);
if (l.a + r.a > 0.0) {
lcol = clamp (downmix[0] * lcol, 0.0, 1.0);
rcol = clamp (downmix[1] * rcol, 0.0, 1.0);
outColor0 = vec4 (lcol + rcol, 1.0);
} else {
outColor0 = vec4 (0.0);
}
} else if (output_type == VIEW_MONO_LEFT) {
outColor0 = swizzle(l, out_reorder_idx);
} else if (output_type == VIEW_MONO_RIGHT) {
outColor0 = swizzle(r, out_reorder_idx);
} else if (output_type == VIEW_SIDE_BY_SIDE) {
if (inTexCoord.x < 0.5) {
outColor0 = swizzle(l, out_reorder_idx);
} else {
outColor0 = swizzle(r, out_reorder_idx);
}
} else if (output_type == VIEW_TOP_BOTTOM) {
if (inTexCoord.y < 0.5) {
outColor0 = swizzle(l, out_reorder_idx);
} else {
outColor0 = swizzle(r, out_reorder_idx);
}
} else if (output_type == VIEW_COLUMN_INTERLEAVED) {
if (int(mod(l_coord.x * tex_size.x, 2.0)) == 0) {
outColor0 = swizzle(l, out_reorder_idx);
} else {
outColor0 = swizzle(r, out_reorder_idx);
}
} else if (output_type == VIEW_ROW_INTERLEAVED) {
if (int(mod(l_coord.y * tex_size.y, 2.0)) == 0) {
outColor0 = swizzle(l, out_reorder_idx);
} else {
outColor0 = swizzle(r, out_reorder_idx);
}
} else if (output_type == VIEW_CHECKERBOARD) {
if (int(mod(l_coord.x * tex_size.x, 2.0)) ==
int(mod(l_coord.y * tex_size.y, 2.0))) {
outColor0 = swizzle(l, out_reorder_idx);
} else {
outColor0 = swizzle(r, out_reorder_idx);
}
} else {
outColor0 = vec4(1.0, 0.0, 1.0, 1.0);
}
}