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out vec4 fragColor;
uniform mat4 ProjectionMatrix;
uniform mat4 ViewMatrixInverse;
uniform usampler2D objectId;
uniform sampler2D colorBuffer;
uniform sampler2D specularBuffer;
uniform sampler2D normalBuffer;
/* normalBuffer contains viewport normals */
uniform sampler2D cavityBuffer;
uniform sampler2D matcapImage;
uniform vec2 invertedViewportSize;
uniform vec4 viewvecs[3];
uniform float shadowMultiplier;
uniform float lightMultiplier;
uniform float shadowShift = 0.1;
uniform float shadowFocus = 1.0;
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 {
/* Do correct alpha blending. */
vec4 background_color = vec4(background, 1.0) * world_data.background_alpha;
vec4 outline_color = vec4(world_data.object_outline_color.rgb, 1.0);
fragColor = mix(outline_color, background_color, object_outline);
fragColor = vec4(fragColor.rgb / max(1e-8, fragColor.a), fragColor.a);
}
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);
/* -------- SHADING --------- */
#ifdef V3D_LIGHTING_FLAT
vec3 shaded_color = diffuse_color.rgb;
#elif defined(V3D_LIGHTING_MATCAP)
bool flipped = world_data.matcap_orientation != 0;
vec2 matcap_uv = matcap_uv_compute(I_vs, normal_viewport, flipped);
vec3 matcap = textureLod(matcapImage, matcap_uv, 0.0).rgb;
vec3 shaded_color = matcap * diffuse_color.rgb;
#elif defined(V3D_LIGHTING_STUDIO)
# ifdef V3D_SHADING_SPECULAR_HIGHLIGHT
vec4 specular_data = texelFetch(specularBuffer, texel, 0);
# else
vec4 specular_data = vec4(0.0);
# endif
vec3 shaded_color = get_world_lighting(world_data,
diffuse_color.rgb, specular_data.rgb, specular_data.a,
normal_viewport, I_vs);
#endif
/* -------- POST EFFECTS --------- */
#ifdef WB_CAVITY
/* Using UNORM texture so decompress the range */
shaded_color *= texelFetch(cavityBuffer, texel, 0).r * CAVITY_BUFFER_RANGE;
#endif
#ifdef V3D_SHADING_SHADOW
float light_factor = -dot(normal_viewport, world_data.shadow_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 = smoothstep(shadowFocus, shadowShift, light_factor);
shaded_color *= mix(lightMultiplier, shadowMultiplier, shadow_mix);
#endif
#ifdef V3D_SHADING_OBJECT_OUTLINE
shaded_color = mix(world_data.object_outline_color.rgb, shaded_color, object_outline);
#endif
fragColor = vec4(shaded_color, 1.0);
}
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