Make shadow vert shaders always contain their content but ensure they are never used when shadow maps are disabled, remove uneeded shadow frag shader

assets/voxygen/shaders/light-shadows-directed-frag.glsl

@@ -1,48 +0,0 @@
-// NOTE: We currently do nothing, and just rely on the default shader behavior.
-//
-// However, in the future we might apply some depth transforms here.
-
-#version 420 core
-// #extension ARB_texture_storage : enable
-
-#include <constants.glsl>
-
-#define LIGHTING_TYPE LIGHTING_TYPE_REFLECTION
-
-#define LIGHTING_REFLECTION_KIND LIGHTING_REFLECTION_KIND_GLOSSY
-
-#if (FLUID_MODE == FLUID_MODE_CHEAP)
-#define LIGHTING_TRANSPORT_MODE LIGHTING_TRANSPORT_MODE_IMPORTANCE
-#elif (FLUID_MODE == FLUID_MODE_SHINY)
-#define LIGHTING_TRANSPORT_MODE LIGHTING_TRANSPORT_MODE_RADIANCE
-#endif
-
-#define LIGHTING_DISTRIBUTION_SCHEME LIGHTING_DISTRIBUTION_SCHEME_MICROFACET
-
-#define LIGHTING_DISTRIBUTION LIGHTING_DISTRIBUTION_BECKMANN
-
-// // Currently, we only need globals for the far plane.
-// #include <globals.glsl>
-// // Currently, we only need lights for the light position
-// #include <light.glsl>
-
-// in vec3 FragPos; // FragPos from GS (output per emitvertex)
-// flat in int FragLayer;
-
-void main()
-{
-    // Only need to do anything with point lights, since sun and moon should already have nonlinear
-    // distance.
-    /*if (FragLayer > 0) */{
-        // get distance between fragment and light source
-        // float lightDistance = length(FragPos - lights[FragLayer & 31].light_pos.xyz);
-
-        // // // map to [0;1] range by dividing by far_plane
-        // lightDistance = lightDistance / screen_res.w;//FragPos.w;//screen_res.w;
-
-        // // // write this as modified depth
-        // // // lightDistance =  -1000.0 / (lightDistance + 10000.0);
-        // // // lightDistance /= screen_res.w;
-        // gl_FragDepth = lightDistance;//  / /*FragPos.w;*/screen_res.w;//-1000.0 / (lightDistance + 1000.0);//lightDistance
-    }
-}

assets/voxygen/shaders/light-shadows-directed-vert.glsl

@@ -54,7 +54,6 @@ uniform u_locals {
 const int EXTRA_NEG_Z = 32768;
 
 void main() {
-#if (SHADOW_MODE == SHADOW_MODE_MAP)
     vec3 f_chunk_pos = vec3(ivec3((uvec3(v_pos_norm) >> uvec3(0, 6, 12)) & uvec3(0x3Fu, 0x3Fu, 0xFFFFu)) - ivec3(0, 0, EXTRA_NEG_Z));
     vec3 f_pos = f_chunk_pos + (model_offs - focus_off.xyz);
     // f_pos = v_pos;
@@ -66,5 +65,4 @@ void main() {
     // gl_Position.z = clamp(gl_Position.z, -abs(gl_Position.w), abs(gl_Position.w));
     // shadowMapCoord = lights[gl_InstanceID].light_pos * gl_Vertex;
     // vec4(v_pos, 0.0, 1.0);
-#endif
 }

assets/voxygen/shaders/light-shadows-figure-vert.glsl

@@ -70,7 +70,6 @@ uniform u_bones {
 // out vec4 shadowMapCoord;
 
 void main() {
-#if (SHADOW_MODE == SHADOW_MODE_MAP)
     uint bone_idx = (v_pos_norm >> 27) & 0xFu;
     vec3 pos = (vec3((uvec3(v_pos_norm) >> uvec3(0, 9, 18)) & uvec3(0x1FFu)) - 256.0) / 2.0;
 
@@ -80,5 +79,4 @@ void main() {
     ).xyz + (model_pos - focus_off.xyz/* + vec3(0.0, 0.0, 0.0001)*/);
 
     gl_Position = shadowMatrices * vec4(f_pos, 1.0);
-#endif
 }

voxygen/src/render/renderer/drawer.rs

@@ -124,9 +124,13 @@ impl<'frame> Drawer<'frame> {
     /// Get the render mode.
     pub fn render_mode(&self) -> &super::super::RenderMode { self.borrow.mode }
 
-    /// Returns None if the shadow renderer is not enabled or the pipelines are
-    /// not available yet
+    /// Returns None if the shadow renderer is not enabled at some level or the
+    /// pipelines are not available yet
     pub fn shadow_pass(&mut self) -> Option<ShadowPassDrawer> {
+        if !self.borrow.mode.shadow.is_map() {
+            return None;
+        }
+
         if let ShadowMap::Enabled(ref shadow_renderer) = self.borrow.shadow?.map {
             let encoder = self.encoder.as_mut().unwrap();
             let device = self.borrow.device;
@@ -256,13 +260,18 @@ impl<'frame> Drawer<'frame> {
         }
     }
 
-    /// Does nothing if the shadow pipelines are not available
+    /// Does nothing if the shadow pipelines are not available or shadow map
+    /// rendering is disabled
     pub fn draw_point_shadows<'data: 'frame>(
         &mut self,
         matrices: &[shadow::PointLightMatrix; 126],
         chunks: impl Clone
         + Iterator<Item = (&'data Model<terrain::Vertex>, &'data terrain::BoundLocals)>,
     ) {
+        if !self.borrow.mode.shadow.is_map() {
+            return;
+        }
+
         if let Some(ShadowMap::Enabled(ref shadow_renderer)) = self.borrow.shadow.map(|s| &s.map) {
             let device = self.borrow.device;
             let mut encoder = self

voxygen/src/render/renderer/pipeline_creation.rs

@@ -630,6 +630,7 @@ fn create_ingame_and_shadow_pipelines(
             terrain,
             // player_shadow_pipeline,
         },
+        // TODO: skip creating these if the shadow map setting is not enabled
         shadow: ShadowPipelines {
             point: Some(point_shadow),
             directed: Some(terrain_directed_shadow),