/* clang-format off */
#[modes]
mode_background =
mode_half_res = #define USE_HALF_RES_PASS
mode_quarter_res = #define USE_QUARTER_RES_PASS
mode_cubemap = #define USE_CUBEMAP_PASS
mode_cubemap_half_res = #define USE_CUBEMAP_PASS \n#define USE_HALF_RES_PASS
mode_cubemap_quarter_res = #define USE_CUBEMAP_PASS \n#define USE_QUARTER_RES_PASS
#[specializations]
USE_MULTIVIEW = false
USE_INVERTED_Y = true
APPLY_TONEMAPPING = true
#[vertex]
layout(location = 0) in vec2 vertex_attrib;
out vec2 uv_interp;
/* clang-format on */
void main() {
#ifdef USE_INVERTED_Y
uv_interp = vertex_attrib;
#else
// We're doing clockwise culling so flip the order
uv_interp = vec2(vertex_attrib.x, vertex_attrib.y * -1.0);
#endif
gl_Position = vec4(uv_interp, -1.0, 1.0);
}
/* clang-format off */
#[fragment]
#define M_PI 3.14159265359
#include "tonemap_inc.glsl"
in vec2 uv_interp;
/* clang-format on */
uniform samplerCube radiance; //texunit:-1
#ifdef USE_CUBEMAP_PASS
uniform samplerCube half_res; //texunit:-2
uniform samplerCube quarter_res; //texunit:-3
#elif defined(USE_MULTIVIEW)
uniform sampler2DArray half_res; //texunit:-2
uniform sampler2DArray quarter_res; //texunit:-3
#else
uniform sampler2D half_res; //texunit:-2
uniform sampler2D quarter_res; //texunit:-3
#endif
layout(std140) uniform GlobalShaderUniformData { //ubo:1
vec4 global_shader_uniforms[MAX_GLOBAL_SHADER_UNIFORMS];
};
struct DirectionalLightData {
vec4 direction_energy;
vec4 color_size;
bool enabled;
};
layout(std140) uniform DirectionalLights { //ubo:4
DirectionalLightData data[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS];
}
directional_lights;
/* clang-format off */
#ifdef MATERIAL_UNIFORMS_USED
layout(std140) uniform MaterialUniforms{ //ubo:3
#MATERIAL_UNIFORMS
};
#endif
/* clang-format on */
#GLOBALS
#ifdef USE_CUBEMAP_PASS
#define AT_CUBEMAP_PASS true
#else
#define AT_CUBEMAP_PASS false
#endif
#ifdef USE_HALF_RES_PASS
#define AT_HALF_RES_PASS true
#else
#define AT_HALF_RES_PASS false
#endif
#ifdef USE_QUARTER_RES_PASS
#define AT_QUARTER_RES_PASS true
#else
#define AT_QUARTER_RES_PASS false
#endif
// mat4 is a waste of space, but we don't have an easy way to set a mat3 uniform for now
uniform mat4 orientation;
uniform vec4 projection;
uniform vec3 position;
uniform float time;
uniform float sky_energy_multiplier;
uniform float luminance_multiplier;
uniform float fog_aerial_perspective;
uniform vec4 fog_light_color;
uniform float fog_sun_scatter;
uniform bool fog_enabled;
uniform float fog_density;
uniform float fog_sky_affect;
uniform uint directional_light_count;
#ifdef USE_MULTIVIEW
layout(std140) uniform MultiviewData { // ubo:11
highp mat4 projection_matrix_view[MAX_VIEWS];
highp mat4 inv_projection_matrix_view[MAX_VIEWS];
highp vec4 eye_offset[MAX_VIEWS];
}
multiview_data;
#endif
layout(location = 0) out vec4 frag_color;
#ifdef USE_DEBANDING
// https://www.iryoku.com/next-generation-post-processing-in-call-of-duty-advanced-warfare
vec3 interleaved_gradient_noise(vec2 pos) {
const vec3 magic = vec3(0.06711056f, 0.00583715f, 52.9829189f);
float res = fract(magic.z * fract(dot(pos, magic.xy))) * 2.0 - 1.0;
return vec3(res, -res, res) / 255.0;
}
#endif
#if !defined(DISABLE_FOG)
vec4 fog_process(vec3 view, vec3 sky_color) {
vec3 fog_color = mix(fog_light_color.rgb, sky_color, fog_aerial_perspective);
if (fog_sun_scatter > 0.001) {
vec4 sun_scatter = vec4(0.0);
float sun_total = 0.0;
for (uint i = 0u; i < directional_light_count; i++) {
vec3 light_color = directional_lights.data[i].color_size.xyz * directional_lights.data[i].direction_energy.w;
float light_amount = pow(max(dot(view, directional_lights.data[i].direction_energy.xyz), 0.0), 8.0);
fog_color += light_color * light_amount * fog_sun_scatter;
}
}
return vec4(fog_color, 1.0);
}
#endif // !DISABLE_FOG
void main() {
vec3 cube_normal;
#ifdef USE_MULTIVIEW
// In multiview our projection matrices will contain positional and rotational offsets that we need to properly unproject.
vec4 unproject = vec4(uv_interp.xy, -1.0, 1.0); // unproject at the far plane
vec4 unprojected = multiview_data.inv_projection_matrix_view[ViewIndex] * unproject;
cube_normal = unprojected.xyz / unprojected.w;
// Unproject will give us the position between the eyes, need to re-offset.
cube_normal += multiview_data.eye_offset[ViewIndex].xyz;
#else
cube_normal.z = -1.0;
cube_normal.x = (uv_interp.x + projection.x) / projection.y;
cube_normal.y = (-uv_interp.y - projection.z) / projection.w;
#endif
cube_normal = mat3(orientation) * cube_normal;
cube_normal = normalize(cube_normal);
vec2 uv = gl_FragCoord.xy; // uv_interp * 0.5 + 0.5;
vec2 panorama_coords = vec2(atan(cube_normal.x, -cube_normal.z), acos(cube_normal.y));
if (panorama_coords.x < 0.0) {
panorama_coords.x += M_PI * 2.0;
}
panorama_coords /= vec2(M_PI * 2.0, M_PI);
vec3 color = vec3(0.0, 0.0, 0.0);
float alpha = 1.0; // Only available to subpasses
vec4 half_res_color = vec4(1.0);
vec4 quarter_res_color = vec4(1.0);
vec4 custom_fog = vec4(0.0);
#ifdef USE_CUBEMAP_PASS
#ifdef USES_HALF_RES_COLOR
half_res_color = texture(samplerCube(half_res, SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP), cube_normal);
#endif
#ifdef USES_QUARTER_RES_COLOR
quarter_res_color = texture(samplerCube(quarter_res, SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP), cube_normal);
#endif
#else
#ifdef USES_HALF_RES_COLOR
#ifdef USE_MULTIVIEW
half_res_color = textureLod(sampler2DArray(half_res, SAMPLER_LINEAR_CLAMP), vec3(uv, ViewIndex), 0.0);
#else
half_res_color = textureLod(sampler2D(half_res, SAMPLER_LINEAR_CLAMP), uv, 0.0);
#endif
#endif
#ifdef USES_QUARTER_RES_COLOR
#ifdef USE_MULTIVIEW
quarter_res_color = textureLod(sampler2DArray(quarter_res, SAMPLER_LINEAR_CLAMP), vec3(uv, ViewIndex), 0.0);
#else
quarter_res_color = textureLod(sampler2D(quarter_res, SAMPLER_LINEAR_CLAMP), uv, 0.0);
#endif
#endif
#endif
{
#CODE : SKY
}
color *= sky_energy_multiplier;
// Convert to Linear for tonemapping so color matches scene shader better
color = srgb_to_linear(color);
#if !defined(DISABLE_FOG) && !defined(USE_CUBEMAP_PASS)
// Draw "fixed" fog before volumetric fog to ensure volumetric fog can appear in front of the sky.
if (fog_enabled) {
vec4 fog = fog_process(cube_normal, color.rgb);
color.rgb = mix(color.rgb, fog.rgb, fog.a * fog_sky_affect);
}
if (custom_fog.a > 0.0) {
color.rgb = mix(color.rgb, custom_fog.rgb, custom_fog.a);
}
#endif // DISABLE_FOG
color *= exposure;
#ifdef APPLY_TONEMAPPING
color = apply_tonemapping(color, white);
#endif
color = linear_to_srgb(color);
frag_color.rgb = color * luminance_multiplier;
frag_color.a = alpha;
#ifdef USE_DEBANDING
frag_color.rgb += interleaved_gradient_noise(gl_FragCoord.xy) * sky_energy_multiplier * luminance_multiplier;
#endif
}
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