385ee5c70b
This allows light sources to be specified in physical light units in addition to the regular energy multiplier. In order to avoid loss of precision at high values, brightness values are premultiplied by an exposure normalization value. In support of Physical Light Units this PR also renames CameraEffects to CameraAttributes.
171 lines
3.9 KiB
GLSL
171 lines
3.9 KiB
GLSL
/* clang-format off */
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#[modes]
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mode_background =
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mode_half_res = #define USE_HALF_RES_PASS
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mode_quarter_res = #define USE_QUARTER_RES_PASS
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mode_cubemap = #define USE_CUBEMAP_PASS
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mode_cubemap_half_res = #define USE_CUBEMAP_PASS \n#define USE_HALF_RES_PASS
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mode_cubemap_quarter_res = #define USE_CUBEMAP_PASS \n#define USE_QUARTER_RES_PASS
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#[specializations]
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#[vertex]
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layout(location = 0) in vec2 vertex_attrib;
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out vec2 uv_interp;
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/* clang-format on */
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void main() {
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uv_interp = vertex_attrib;
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gl_Position = vec4(uv_interp, 1.0, 1.0);
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}
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/* clang-format off */
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#[fragment]
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#define M_PI 3.14159265359
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#include "tonemap_inc.glsl"
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in vec2 uv_interp;
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/* clang-format on */
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uniform samplerCube radiance; //texunit:-1
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#ifdef USE_CUBEMAP_PASS
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uniform samplerCube half_res; //texunit:-2
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uniform samplerCube quarter_res; //texunit:-3
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#else
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uniform sampler2D half_res; //texunit:-2
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uniform sampler2D quarter_res; //texunit:-3
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#endif
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layout(std140) uniform GlobalShaderUniformData { //ubo:1
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vec4 global_shader_uniforms[MAX_GLOBAL_SHADER_UNIFORMS];
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};
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struct DirectionalLightData {
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vec4 direction_energy;
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vec4 color_size;
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bool enabled;
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};
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layout(std140) uniform DirectionalLights { //ubo:4
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DirectionalLightData data[MAX_DIRECTIONAL_LIGHT_DATA_STRUCTS];
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}
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directional_lights;
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/* clang-format off */
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#ifdef MATERIAL_UNIFORMS_USED
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layout(std140) uniform MaterialUniforms{ //ubo:3
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#MATERIAL_UNIFORMS
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};
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#endif
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/* clang-format on */
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#GLOBALS
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#ifdef USE_CUBEMAP_PASS
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#define AT_CUBEMAP_PASS true
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#else
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#define AT_CUBEMAP_PASS false
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#endif
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#ifdef USE_HALF_RES_PASS
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#define AT_HALF_RES_PASS true
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#else
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#define AT_HALF_RES_PASS false
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#endif
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#ifdef USE_QUARTER_RES_PASS
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#define AT_QUARTER_RES_PASS true
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#else
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#define AT_QUARTER_RES_PASS false
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#endif
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// mat4 is a waste of space, but we don't have an easy way to set a mat3 uniform for now
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uniform mat4 orientation;
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uniform vec4 projection;
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uniform vec3 position;
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uniform float time;
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uniform float luminance_multiplier;
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uniform float fog_aerial_perspective;
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uniform vec3 fog_light_color;
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uniform float fog_sun_scatter;
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uniform bool fog_enabled;
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uniform float fog_density;
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uniform float z_far;
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uniform uint directional_light_count;
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layout(location = 0) out vec4 frag_color;
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void main() {
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vec3 cube_normal;
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cube_normal.z = -1.0;
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cube_normal.x = (uv_interp.x + projection.x) / projection.y;
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cube_normal.y = (-uv_interp.y - projection.z) / projection.w;
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cube_normal = mat3(orientation) * cube_normal;
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cube_normal = normalize(cube_normal);
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vec2 uv = gl_FragCoord.xy; // uv_interp * 0.5 + 0.5;
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vec2 panorama_coords = vec2(atan(cube_normal.x, -cube_normal.z), acos(cube_normal.y));
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if (panorama_coords.x < 0.0) {
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panorama_coords.x += M_PI * 2.0;
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}
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panorama_coords /= vec2(M_PI * 2.0, M_PI);
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vec3 color = vec3(0.0, 0.0, 0.0);
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float alpha = 1.0; // Only available to subpasses
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vec4 half_res_color = vec4(1.0);
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vec4 quarter_res_color = vec4(1.0);
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vec4 custom_fog = vec4(0.0);
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#ifdef USE_CUBEMAP_PASS
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#ifdef USES_HALF_RES_COLOR
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half_res_color = texture(samplerCube(half_res, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), cube_normal);
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#endif
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#ifdef USES_QUARTER_RES_COLOR
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quarter_res_color = texture(samplerCube(quarter_res, material_samplers[SAMPLER_LINEAR_WITH_MIPMAPS_CLAMP]), cube_normal);
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#endif
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#else
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#ifdef USES_HALF_RES_COLOR
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half_res_color = textureLod(sampler2D(half_res, material_samplers[SAMPLER_LINEAR_CLAMP]), uv, 0.0);
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#endif
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#ifdef USES_QUARTER_RES_COLOR
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quarter_res_color = textureLod(sampler2D(quarter_res, material_samplers[SAMPLER_LINEAR_CLAMP]), uv, 0.0);
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#endif
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#endif
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{
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#CODE : SKY
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}
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color *= luminance_multiplier;
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// Convert to Linear for tonemapping so color matches scene shader better
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color = srgb_to_linear(color);
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color *= exposure;
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color = apply_tonemapping(color, white);
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color = linear_to_srgb(color);
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#ifdef USE_BCS
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color = apply_bcs(color, bcs);
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#endif
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#ifdef USE_COLOR_CORRECTION
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color = apply_color_correction(color, color_correction);
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#endif
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frag_color.rgb = color;
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frag_color.a = alpha;
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}
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