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out vec4 fragColor;
uniform mat4 ProjectionMatrix;
uniform usampler2D objectId;
uniform sampler2D colorBuffer;
uniform sampler2D specularBuffer;
uniform sampler2D normalBuffer;
/* normalBuffer contains viewport normals */
uniform sampler2D cavityBuffer;
uniform vec2 invertedViewportSize;
uniform vec4 viewvecs[3];
uniform float shadowMultiplier;
uniform float lightMultiplier;
uniform float shadowShift = 0.1;
uniform mat3 normalWorldMatrix;
#ifdef STUDIOLIGHT_ORIENTATION_VIEWNORMAL
uniform sampler2D matcapImage;
#endif
layout(std140) uniform world_block {
WorldData world_data;
};
void main()
{
ivec2 texel = ivec2(gl_FragCoord.xy);
vec2 uv_viewport = gl_FragCoord.xy * invertedViewportSize;
uint object_id = texelFetch(objectId, texel, 0).r;
#ifndef V3D_SHADING_OBJECT_OUTLINE
if (object_id == NO_OBJECT_ID) {
fragColor = vec4(background_color(world_data, uv_viewport.y), world_data.background_alpha);
return;
}
#else /* !V3D_SHADING_OBJECT_OUTLINE */
float object_outline = calculate_object_outline(objectId, texel, object_id);
if (object_id == NO_OBJECT_ID) {
vec3 background = background_color(world_data, uv_viewport.y);
if (object_outline == 0.0) {
fragColor = vec4(background, world_data.background_alpha);
}
else {
fragColor = vec4(mix(world_data.object_outline_color.rgb, background, object_outline), clamp(world_data.background_alpha, 1.0, object_outline));
}
return;
}
#endif /* !V3D_SHADING_OBJECT_OUTLINE */
vec4 diffuse_color = texelFetch(colorBuffer, texel, 0);
/* Do we need normals */
#ifdef NORMAL_VIEWPORT_PASS_ENABLED
# ifdef WORKBENCH_ENCODE_NORMALS
vec3 normal_viewport = normal_decode(texelFetch(normalBuffer, texel, 0).rg);
if (diffuse_color.a == 0.0) {
normal_viewport = -normal_viewport;
}
# else /* WORKBENCH_ENCODE_NORMALS */
vec3 normal_viewport = texelFetch(normalBuffer, texel, 0).rgb;
# endif /* WORKBENCH_ENCODE_NORMALS */
#endif
vec3 I_vs = view_vector_from_screen_uv(uv_viewport, viewvecs, ProjectionMatrix);
#ifdef STUDIOLIGHT_ORIENTATION_VIEWNORMAL
bool flipped = world_data.matcap_orientation != 0;
vec2 matcap_uv = matcap_uv_compute(I_vs, normal_viewport, flipped);
diffuse_color = textureLod(matcapImage, matcap_uv, 0.0);
#endif
#ifdef V3D_SHADING_SPECULAR_HIGHLIGHT
vec4 specular_data = texelFetch(specularBuffer, texel, 0);
vec3 specular_color = get_world_specular_lights(world_data, specular_data, normal_viewport, I_vs);
#else
vec3 specular_color = vec3(0.0);
#endif
#ifdef V3D_LIGHTING_FLAT
vec3 diffuse_light = vec3(1.0);
#endif
#ifdef V3D_LIGHTING_MATCAP
vec3 diffuse_light = texelFetch(specularBuffer, texel, 0).rgb;
#endif
#ifdef V3D_LIGHTING_STUDIO
# ifdef STUDIOLIGHT_ORIENTATION_CAMERA
vec3 diffuse_light = get_camera_diffuse_light(world_data, normal_viewport);
# endif
# ifdef STUDIOLIGHT_ORIENTATION_WORLD
vec3 normal_world = normalWorldMatrix * normal_viewport;
vec3 diffuse_light = get_world_diffuse_light(world_data, normal_world);
# endif
#endif
vec3 shaded_color = diffuse_light * diffuse_color.rgb + specular_color;
#ifdef V3D_SHADING_CAVITY
vec2 cavity = texelFetch(cavityBuffer, texel, 0).rg;
shaded_color *= 1.0 - cavity.x;
shaded_color *= 1.0 + cavity.y;
#endif
#ifdef V3D_SHADING_SHADOW
float light_factor = -dot(normal_viewport, world_data.lights[0].light_direction_vs.xyz);
/* The step function might be ok for meshes but it's
* clearly not the case for hairs. Do smoothstep in this case. */
float shadow_mix = (diffuse_color.a == 1.0 || diffuse_color.a == 0.0)
? step(-shadowShift, -light_factor)
: smoothstep(1.0, shadowShift, light_factor);
float light_multiplier = mix(lightMultiplier, shadowMultiplier, shadow_mix);
#else /* V3D_SHADING_SHADOW */
float light_multiplier = 1.0;
#endif /* V3D_SHADING_SHADOW */
shaded_color *= light_multiplier;
#ifdef V3D_SHADING_OBJECT_OUTLINE
shaded_color = mix(world_data.object_outline_color.rgb, shaded_color, object_outline);
#endif /* V3D_SHADING_OBJECT_OUTLINE */
fragColor = vec4(shaded_color, 1.0);
}
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