Cleanup: EEVEE: Remove unused IRRADIANCE_CUBEMAP

source/blender/draw/engines/eevee/eevee_lightcache.c

@@ -53,9 +53,6 @@
 #if defined(IRRADIANCE_SH_L2)
 #  define IRRADIANCE_SAMPLE_SIZE_X 4 /* 3 in reality */
 #  define IRRADIANCE_SAMPLE_SIZE_Y 4 /* 3 in reality */
-#elif defined(IRRADIANCE_CUBEMAP)
-#  define IRRADIANCE_SAMPLE_SIZE_X 8
-#  define IRRADIANCE_SAMPLE_SIZE_Y 8
 #elif defined(IRRADIANCE_HL2)
 #  define IRRADIANCE_SAMPLE_SIZE_X 4 /* 3 in reality */
 #  define IRRADIANCE_SAMPLE_SIZE_Y 2

source/blender/draw/engines/eevee/eevee_lightprobes.c

@@ -179,8 +179,6 @@ void EEVEE_lightprobes_init(EEVEE_ViewLayerData *sldata, EEVEE_Data *vedata)
     if (!sldata->fallback_lightcache) {
 #if defined(IRRADIANCE_SH_L2)
       int grid_res = 4;
-#elif defined(IRRADIANCE_CUBEMAP)
-      int grid_res = 8;
 #elif defined(IRRADIANCE_HL2)
       int grid_res = 4;
 #endif
@@ -1114,9 +1112,6 @@ void EEVEE_lightbake_filter_diffuse(EEVEE_ViewLayerData *sldata,
   /* NOTE : Keep in sync with load_irradiance_cell() */
 #if defined(IRRADIANCE_SH_L2)
   int size[2] = {3, 3};
-#elif defined(IRRADIANCE_CUBEMAP)
-  int size[2] = {8, 8};
-  pinfo->samples_len = 1024.0f;
 #elif defined(IRRADIANCE_HL2)
   int size[2] = {3, 2};
   pinfo->samples_len = 1024.0f;

source/blender/draw/engines/eevee/eevee_lookdev.c

@@ -170,8 +170,6 @@ void EEVEE_lookdev_cache_init(EEVEE_Data *vedata,
       if (stl->lookdev_lightcache == NULL) {
 #if defined(IRRADIANCE_SH_L2)
         int grid_res = 4;
-#elif defined(IRRADIANCE_CUBEMAP)
-        int grid_res = 8;
 #elif defined(IRRADIANCE_HL2)
         int grid_res = 4;
 #endif

source/blender/draw/engines/eevee/eevee_private.h

@@ -53,14 +53,11 @@ extern struct DrawEngineType draw_engine_eevee_type;
 
 /* Only define one of these. */
 // #define IRRADIANCE_SH_L2
-// #define IRRADIANCE_CUBEMAP
 #define IRRADIANCE_HL2
 #define HAMMERSLEY_SIZE 1024
 
 #if defined(IRRADIANCE_SH_L2)
 #  define SHADER_IRRADIANCE "#define IRRADIANCE_SH_L2\n"
-#elif defined(IRRADIANCE_CUBEMAP)
-#  define SHADER_IRRADIANCE "#define IRRADIANCE_CUBEMAP\n"
 #elif defined(IRRADIANCE_HL2)
 #  define SHADER_IRRADIANCE "#define IRRADIANCE_HL2\n"
 #endif

source/blender/draw/engines/eevee/shaders/irradiance_lib.glsl

@@ -3,11 +3,7 @@ uniform sampler2DArray irradianceGrid;
 
 #define IRRADIANCE_LIB
 
-#ifdef IRRADIANCE_CUBEMAP
-struct IrradianceData {
-  vec3 color;
-};
-#elif defined(IRRADIANCE_SH_L2)
+#if defined(IRRADIANCE_SH_L2)
 struct IrradianceData {
   vec3 shcoefs[9];
 };
@@ -21,24 +17,7 @@ IrradianceData load_irradiance_cell(int cell, vec3 N)
 {
   /* Keep in sync with diffuse_filter_probe() */
 
-#if defined(IRRADIANCE_CUBEMAP)
-
-#  define AMBIANT_CUBESIZE 8
-  ivec2 cell_co = ivec2(AMBIANT_CUBESIZE);
-  int cell_per_row = textureSize(irradianceGrid, 0).x / cell_co.x;
-  cell_co.x *= cell % cell_per_row;
-  cell_co.y *= cell / cell_per_row;
-
-  vec2 texelSize = 1.0 / vec2(AMBIANT_CUBESIZE);
-
-  vec2 uvs = mapping_octahedron(N, texelSize);
-  uvs *= vec2(AMBIANT_CUBESIZE) / vec2(textureSize(irradianceGrid, 0));
-  uvs += vec2(cell_co) / vec2(textureSize(irradianceGrid, 0));
-
-  IrradianceData ir;
-  ir.color = texture(irradianceGrid, vec3(uvs, 0.0)).rgb;
-
-#elif defined(IRRADIANCE_SH_L2)
+#if defined(IRRADIANCE_SH_L2)
 
   ivec2 cell_co = ivec2(3, 3);
   int cell_per_row = textureSize(irradianceGrid, 0).x / cell_co.x;
@@ -164,9 +143,7 @@ vec3 hl2_basis(vec3 N, vec3 cubesides[3])
 
 vec3 compute_irradiance(vec3 N, IrradianceData ird)
 {
-#if defined(IRRADIANCE_CUBEMAP)
-  return ird.color;
-#elif defined(IRRADIANCE_SH_L2)
+#if defined(IRRADIANCE_SH_L2)
   return spherical_harmonics_L2(N, ird.shcoefs);
 #else /* defined(IRRADIANCE_HL2) */
   return hl2_basis(N, ird.cubesides);

source/blender/draw/engines/eevee/shaders/lightprobe_filter_diffuse_frag.glsl

@@ -111,32 +111,7 @@ void main()
 
   FragColor = vec4(sh, 1.0);
 #else
-#  if defined(IRRADIANCE_CUBEMAP)
-  /* Downside: Need lots of memory for storage, distortion due to octahedral mapping */
-  const vec2 map_size = vec2(16.0);
-  const vec2 texelSize = 1.0 / map_size;
-  vec2 uvs = mod(gl_FragCoord.xy, map_size) * texelSize;
-  const float paddingSize = 1.0;
-
-  /* Add a N pixel border to ensure filtering is correct
-   * for N mipmap levels. */
-  uvs = (uvs - texelSize * paddingSize) / (1.0 - 2.0 * texelSize * paddingSize);
-
-  /* edge mirroring : only mirror if directly adjacent
-   * (not diagonally adjacent) */
-  vec2 m = abs(uvs - 0.5) + 0.5;
-  vec2 f = floor(m);
-  if (f.x - f.y != 0.0) {
-    uvs = 1.0 - uvs;
-  }
-
-  /* clamp to [0-1] */
-  uvs = fract(uvs);
-
-  /* get cubemap vector */
-  vec3 cubevec = octahedral_to_cubemap_proj(uvs);
-
-#  elif defined(IRRADIANCE_HL2)
+#  if defined(IRRADIANCE_HL2)
   /* Downside: very very low resolution (6 texels), bleed lighting because of interpolation */
   int x = int(gl_FragCoord.x) % 3;
   int y = int(gl_FragCoord.y) % 2;

source/blender/draw/engines/eevee/shaders/lightprobe_grid_fill_frag.glsl

@@ -6,8 +6,6 @@ void main()
 {
 #if defined(IRRADIANCE_SH_L2)
   const ivec2 data_size = ivec2(3, 3);
-#elif defined(IRRADIANCE_CUBEMAP)
-  const ivec2 data_size = ivec2(8, 8);
 #elif defined(IRRADIANCE_HL2)
   const ivec2 data_size = ivec2(3, 2);
 #endif