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host_shaders: Improve anaglyph quality

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* Use matrices optimized for LCD displays
This commit is contained in:
GPUCode 2023-07-30 00:41:56 +03:00
parent ea928374a6
commit 96c375229b
1 changed files with 26 additions and 15 deletions
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41
src/video_core/host_shaders/opengl_present_anaglyph.frag
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@ -4,17 +4,16 @@
//? #version 430 core
// Anaglyph Red-Cyan shader based on Dubois algorithm
// Constants taken from the paper:
// "Conversion of a Stereo Pair to Anaglyph with
// the Least-Squares Projection Method"
// Eric Dubois, March 2009
const mat3 l = mat3( 0.437, 0.449, 0.164,
-0.062,-0.062,-0.024,
-0.048,-0.050,-0.017);
const mat3 r = mat3(-0.011,-0.032,-0.007,
0.377, 0.761, 0.009,
-0.026,-0.093, 1.234);
// https://cybereality.com/rendepth-red-cyan-anaglyph-filter-optimized-for-stereoscopic-3d-on-lcd-monitors/
const mat3 left_filter = mat3(
vec3(0.4561, 0.500484, 0.176381),
vec3(-0.400822, -0.0378246, -0.0157589),
vec3(-0.0152161, -0.0205971, -0.00546856));
const mat3 right_filter = mat3(
vec3(-0.0434706, -0.0879388, -0.00155529),
vec3(0.378476, 0.73364, -0.0184503),
vec3(-0.0721527, -0.112961, 1.2264));
layout(location = 0) in vec2 frag_tex_coord;
layout(location = 0) out vec4 color;
@ -25,8 +24,20 @@ layout(binding = 1) uniform sampler2D color_texture_r;
uniform vec4 resolution;
uniform int layer;
void main() {
vec4 color_tex_l = texture(color_texture, frag_tex_coord);
vec4 color_tex_r = texture(color_texture_r, frag_tex_coord);
color = vec4(color_tex_l.rgb*l+color_tex_r.rgb*r, color_tex_l.a);
const vec3 gamma_map = vec3(1.6, 0.8, 1.0);
vec3 correct_color(vec3 original) {
vec3 corrected;
corrected.r = pow(original.r, 1.0 / gamma_map.r);
corrected.g = pow(original.g, 1.0 / gamma_map.g);
corrected.b = pow(original.b, 1.0 / gamma_map.b);
return corrected;
}
void main() {
vec4 color_left = texture(color_texture, frag_tex_coord);
vec4 color_right = texture(color_texture_r, frag_tex_coord);
vec3 optimized_color = clamp(color_left.rgb * left_filter, vec3(0.0), vec3(1.0)) +
clamp(color_right.rgb * right_filter, vec3(0.0), vec3(1.0));
color = vec4(correct_color(optimized_color), color_left.a);
}