DRW: Refactor to support draw call batching

Reviewers: brecht

Differential Revision: D4997

20 files changed, 254 insertions, 274 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_materials.c b/source/blender/draw/engines/eevee/eevee_materials.c
index 712bcc43f52..2158d395d84 100644
--- a/source/blender/draw/engines/eevee/eevee_materials.c
+++ b/source/blender/draw/engines/eevee/eevee_materials.c
@@ -48,6 +48,9 @@ static struct {
   char *frag_shader_lib;
   char *vert_shader_str;
   char *vert_shadow_shader_str;
+  char *vert_background_shader_str;
+  char *vert_volume_shader_str;
+  char *geom_volume_shader_str;
   char *volume_shader_lib;
 
   struct GPUShader *default_prepass_sh;
@@ -565,6 +568,15 @@ void EEVEE_materials_init(EEVEE_ViewLayerData *sldata,
     e_data.vert_shadow_shader_str = BLI_string_joinN(
         datatoc_common_view_lib_glsl, datatoc_common_hair_lib_glsl, datatoc_shadow_vert_glsl);
 
+    e_data.vert_background_shader_str = BLI_string_joinN(datatoc_common_view_lib_glsl,
+                                                         datatoc_background_vert_glsl);
+
+    e_data.vert_volume_shader_str = BLI_string_joinN(datatoc_common_view_lib_glsl,
+                                                     datatoc_volumetric_vert_glsl);
+
+    e_data.geom_volume_shader_str = BLI_string_joinN(datatoc_common_view_lib_glsl,
+                                                     datatoc_volumetric_geom_glsl);
+
     e_data.default_background = DRW_shader_create_with_lib(datatoc_background_vert_glsl,
                                                            NULL,
                                                            datatoc_default_world_frag_glsl,
@@ -637,7 +649,7 @@ struct GPUMaterial *EEVEE_material_world_lightprobe_get(struct Scene *scene, Wor
                                       wo,
                                       engine,
                                       options,
-                                      datatoc_background_vert_glsl,
+                                      e_data.vert_background_shader_str,
                                       NULL,
                                       e_data.frag_shader_lib,
                                       SHADER_DEFINES "#define PROBE_CAPTURE\n",
@@ -657,7 +669,7 @@ struct GPUMaterial *EEVEE_material_world_background_get(struct Scene *scene, Wor
                                       wo,
                                       engine,
                                       options,
-                                      datatoc_background_vert_glsl,
+                                      e_data.vert_background_shader_str,
                                       NULL,
                                       e_data.frag_shader_lib,
                                       SHADER_DEFINES "#define WORLD_BACKGROUND\n",
@@ -680,8 +692,8 @@ struct GPUMaterial *EEVEE_material_world_volume_get(struct Scene *scene, World *
                                      wo,
                                      engine,
                                      options,
-                                     datatoc_volumetric_vert_glsl,
-                                     datatoc_volumetric_geom_glsl,
+                                     e_data.vert_volume_shader_str,
+                                     e_data.geom_volume_shader_str,
                                      e_data.volume_shader_lib,
                                      defines,
                                      true);
@@ -741,8 +753,8 @@ struct GPUMaterial *EEVEE_material_mesh_volume_get(struct Scene *scene, Material
                                         ma,
                                         engine,
                                         options,
-                                        datatoc_volumetric_vert_glsl,
-                                        datatoc_volumetric_geom_glsl,
+                                        e_data.vert_volume_shader_str,
+                                        e_data.geom_volume_shader_str,
                                         e_data.volume_shader_lib,
                                         defines,
                                         true);
@@ -1338,6 +1350,24 @@ static void material_transparent(Material *ma,
   const float *spec_p = &ma->spec;
   const float *rough_p = &ma->roughness;
 
+  const bool use_prepass = ((ma->blend_flag & MA_BL_HIDE_BACKFACE) != 0);
+
+  DRWState cur_state;
+  DRWState all_state = (DRW_STATE_WRITE_DEPTH | DRW_STATE_WRITE_COLOR | DRW_STATE_CULL_BACK |
+                        DRW_STATE_DEPTH_LESS_EQUAL | DRW_STATE_DEPTH_EQUAL |
+                        DRW_STATE_BLEND_CUSTOM);
+
+  /* Depth prepass */
+  if (use_prepass) {
+    *shgrp_depth = DRW_shgroup_create(e_data.default_prepass_clip_sh, psl->transparent_pass);
+
+    cur_state = DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS_EQUAL;
+    cur_state |= (do_cull) ? DRW_STATE_CULL_BACK : 0;
+
+    DRW_shgroup_state_disable(*shgrp_depth, all_state);
+    DRW_shgroup_state_enable(*shgrp_depth, cur_state);
+  }
+
   if (ma->use_nodes && ma->nodetree) {
     static float error_col[3] = {1.0f, 0.0f, 1.0f};
     static float compile_col[3] = {0.5f, 0.5f, 0.5f};
@@ -1394,30 +1424,13 @@ static void material_transparent(Material *ma,
     DRW_shgroup_uniform_float(*shgrp, "roughness", rough_p, 1);
   }
 
-  const bool use_prepass = ((ma->blend_flag & MA_BL_HIDE_BACKFACE) != 0);
-
-  DRWState all_state = (DRW_STATE_WRITE_DEPTH | DRW_STATE_WRITE_COLOR | DRW_STATE_CULL_BACK |
-                        DRW_STATE_DEPTH_LESS_EQUAL | DRW_STATE_DEPTH_EQUAL |
-                        DRW_STATE_BLEND_CUSTOM);
-
-  DRWState cur_state = DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_CUSTOM;
+  cur_state = DRW_STATE_WRITE_COLOR | DRW_STATE_BLEND_CUSTOM;
   cur_state |= (use_prepass) ? DRW_STATE_DEPTH_EQUAL : DRW_STATE_DEPTH_LESS_EQUAL;
   cur_state |= (do_cull) ? DRW_STATE_CULL_BACK : 0;
 
   /* Disable other blend modes and use the one we want. */
   DRW_shgroup_state_disable(*shgrp, all_state);
   DRW_shgroup_state_enable(*shgrp, cur_state);
-
-  /* Depth prepass */
-  if (use_prepass) {
-    *shgrp_depth = DRW_shgroup_create(e_data.default_prepass_clip_sh, psl->transparent_pass);
-
-    cur_state = DRW_STATE_WRITE_DEPTH | DRW_STATE_DEPTH_LESS_EQUAL;
-    cur_state |= (do_cull) ? DRW_STATE_CULL_BACK : 0;
-
-    DRW_shgroup_state_disable(*shgrp_depth, all_state);
-    DRW_shgroup_state_enable(*shgrp_depth, cur_state);
-  }
 }
 
 /* Return correct material or &defmaterial if slot is empty. */
@@ -1734,6 +1747,9 @@ void EEVEE_materials_free(void)
   MEM_SAFE_FREE(e_data.frag_shader_lib);
   MEM_SAFE_FREE(e_data.vert_shader_str);
   MEM_SAFE_FREE(e_data.vert_shadow_shader_str);
+  MEM_SAFE_FREE(e_data.vert_background_shader_str);
+  MEM_SAFE_FREE(e_data.vert_volume_shader_str);
+  MEM_SAFE_FREE(e_data.geom_volume_shader_str);
   MEM_SAFE_FREE(e_data.volume_shader_lib);
   DRW_SHADER_FREE_SAFE(e_data.default_hair_prepass_sh);
   DRW_SHADER_FREE_SAFE(e_data.default_hair_prepass_clip_sh);
diff --git a/source/blender/draw/engines/gpencil/gpencil_draw_utils.c b/source/blender/draw/engines/gpencil/gpencil_draw_utils.c
index 882f2285296..9cf4a72dc31 100644
--- a/source/blender/draw/engines/gpencil/gpencil_draw_utils.c
+++ b/source/blender/draw/engines/gpencil/gpencil_draw_utils.c
@@ -415,6 +415,7 @@ static DRWShadingGroup *gpencil_shgroup_fill_create(GPENCIL_Data *vedata,
                                                     DRWPass *pass,
                                                     GPUShader *shader,
                                                     Object *ob,
+                                                    float (*obmat)[4],
                                                     bGPdata *gpd,
                                                     bGPDlayer *gpl,
                                                     MaterialGPencilStyle *gp_style,
@@ -428,6 +429,8 @@ static DRWShadingGroup *gpencil_shgroup_fill_create(GPENCIL_Data *vedata,
   /* e_data.gpencil_fill_sh */
   DRWShadingGroup *grp = DRW_shgroup_create(shader, pass);
 
+  DRW_shgroup_uniform_mat4(grp, "gpModelMatrix", obmat);
+
   DRW_shgroup_uniform_vec4(grp, "color2", gp_style->mix_rgba, 1);
 
   /* set style type */
@@ -561,6 +564,7 @@ DRWShadingGroup *gpencil_shgroup_stroke_create(GPENCIL_Data *vedata,
                                                DRWPass *pass,
                                                GPUShader *shader,
                                                Object *ob,
+                                               float (*obmat)[4],
                                                bGPdata *gpd,
                                                bGPDlayer *gpl,
                                                bGPDstroke *gps,
@@ -582,6 +586,8 @@ DRWShadingGroup *gpencil_shgroup_stroke_create(GPENCIL_Data *vedata,
 
   DRW_shgroup_uniform_float(grp, "pixsize", stl->storage->pixsize, 1);
 
+  DRW_shgroup_uniform_mat4(grp, "gpModelMatrix", obmat);
+
   /* avoid wrong values */
   if ((gpd) && (gpd->pixfactor == 0.0f)) {
     gpd->pixfactor = GP_DEFAULT_PIX_FACTOR;
@@ -724,6 +730,7 @@ static DRWShadingGroup *gpencil_shgroup_point_create(GPENCIL_Data *vedata,
                                                      DRWPass *pass,
                                                      GPUShader *shader,
                                                      Object *ob,
+                                                     float (*obmat)[4],
                                                      bGPdata *gpd,
                                                      bGPDlayer *gpl,
                                                      bGPDstroke *gps,
@@ -744,6 +751,8 @@ static DRWShadingGroup *gpencil_shgroup_point_create(GPENCIL_Data *vedata,
   DRW_shgroup_uniform_vec2(grp, "Viewport", viewport_size, 1);
   DRW_shgroup_uniform_float(grp, "pixsize", stl->storage->pixsize, 1);
 
+  DRW_shgroup_uniform_mat4(grp, "gpModelMatrix", obmat);
+
   /* avoid wrong values */
   if ((gpd) && (gpd->pixfactor == 0.0f)) {
     gpd->pixfactor = GP_DEFAULT_PIX_FACTOR;
@@ -1568,6 +1577,9 @@ void gpencil_populate_buffer_strokes(GPENCIL_e_data *e_data,
       copy_v2_v2(stl->storage->gradient_s, brush->gpencil_settings->gradient_s);
       stl->storage->alignment_mode = (gp_style) ? gp_style->alignment_mode : GP_STYLE_FOLLOW_PATH;
 
+      float unit_mat[4][4];
+      unit_m4(unit_mat);
+
       /* if only one point, don't need to draw buffer because the user has no time to see it */
       if (gpd->runtime.sbuffer_used > 1) {
         if ((gp_style) && (gp_style->mode == GP_STYLE_MODE_LINE)) {
@@ -1576,6 +1588,7 @@ void gpencil_populate_buffer_strokes(GPENCIL_e_data *e_data,
               psl->drawing_pass,
               e_data->gpencil_stroke_sh,
               NULL,
+              unit_mat,
               gpd,
               NULL,
               NULL,
@@ -1600,6 +1613,7 @@ void gpencil_populate_buffer_strokes(GPENCIL_e_data *e_data,
               psl->drawing_pass,
               e_data->gpencil_point_sh,
               NULL,
+              unit_mat,
               gpd,
               NULL,
               NULL,
@@ -1786,6 +1800,7 @@ static void gpencil_shgroups_create(GPENCIL_e_data *e_data,
                                               stroke_pass,
                                               e_data->gpencil_stroke_sh,
                                               ob,
+                                              obmat,
                                               gpd,
                                               gpl,
                                               gps,
@@ -1794,23 +1809,26 @@ static void gpencil_shgroups_create(GPENCIL_e_data *e_data,
                                               elm->onion,
                                               scale,
                                               cache_ob->shading_type);
-        if ((do_onion) || (elm->onion == false)) {
-          DRW_shgroup_call_range_obmat(shgrp, cache->b_stroke.batch, obmat, start_stroke, len);
-        }
-        stl->storage->shgroup_id++;
-        start_stroke = elm->vertex_idx;
 
         /* set stencil mask id */
         if (gpencil_is_stencil_required(gp_style)) {
+          if (stencil_id == 1) {
+            /* Clear previous stencils. */
+            DRW_shgroup_clear_framebuffer(shgrp, GPU_STENCIL_BIT, 0, 0, 0, 0, 0.0f, 0x0);
+          }
           DRW_shgroup_stencil_mask(shgrp, stencil_id);
           stencil_id++;
         }
         else {
           /* Disable stencil for this type */
           DRW_shgroup_state_disable(shgrp, DRW_STATE_WRITE_STENCIL | DRW_STATE_STENCIL_NEQUAL);
-          /* set stencil mask id as not used */
-          DRW_shgroup_stencil_mask(shgrp, 0x0);
         }
+
+        if ((do_onion) || (elm->onion == false)) {
+          DRW_shgroup_call_range(shgrp, cache->b_stroke.batch, start_stroke, len);
+        }
+        stl->storage->shgroup_id++;
+        start_stroke = elm->vertex_idx;
         break;
       }
       case eGpencilBatchGroupType_Point: {
@@ -1820,6 +1838,7 @@ static void gpencil_shgroups_create(GPENCIL_e_data *e_data,
                                              stroke_pass,
                                              e_data->gpencil_point_sh,
                                              ob,
+                                             obmat,
                                              gpd,
                                              gpl,
                                              gps,
@@ -1829,16 +1848,14 @@ static void gpencil_shgroups_create(GPENCIL_e_data *e_data,
                                              scale,
                                              cache_ob->shading_type);
 
+        /* Disable stencil for this type */
+        DRW_shgroup_state_disable(shgrp, DRW_STATE_WRITE_STENCIL | DRW_STATE_STENCIL_NEQUAL);
+
         if ((do_onion) || (elm->onion == false)) {
-          DRW_shgroup_call_range_obmat(shgrp, cache->b_point.batch, obmat, start_point, len);
+          DRW_shgroup_call_range(shgrp, cache->b_point.batch, start_point, len);
         }
         stl->storage->shgroup_id++;
         start_point = elm->vertex_idx;
-
-        /* Disable stencil for this type */
-        DRW_shgroup_state_disable(shgrp, DRW_STATE_WRITE_STENCIL | DRW_STATE_STENCIL_NEQUAL);
-        /* set stencil mask id as not used */
-        DRW_shgroup_stencil_mask(shgrp, 0x0);
         break;
       }
       case eGpencilBatchGroupType_Fill: {
@@ -1848,30 +1865,32 @@ static void gpencil_shgroups_create(GPENCIL_e_data *e_data,
                                             stroke_pass,
                                             e_data->gpencil_fill_sh,
                                             ob,
+                                            obmat,
                                             gpd,
                                             gpl,
                                             gp_style,
                                             stl->storage->shgroup_id,
                                             cache_ob->shading_type);
 
+        /* Disable stencil for this type */
+        DRW_shgroup_state_disable(shgrp, DRW_STATE_WRITE_STENCIL | DRW_STATE_STENCIL_NEQUAL);
+
         if ((do_onion) || (elm->onion == false)) {
-          DRW_shgroup_call_range_obmat(shgrp, cache->b_fill.batch, obmat, start_fill, len);
+          DRW_shgroup_call_range(shgrp, cache->b_fill.batch, start_fill, len);
         }
         stl->storage->shgroup_id++;
         start_fill = elm->vertex_idx;
-
-        /* Disable stencil for this type */
-        DRW_shgroup_state_disable(shgrp, DRW_STATE_WRITE_STENCIL | DRW_STATE_STENCIL_NEQUAL);
-        /* set stencil mask id as not used */
-        DRW_shgroup_stencil_mask(shgrp, 0x0);
         break;
       }
       case eGpencilBatchGroupType_Edit: {
         if (stl->g_data->shgrps_edit_point) {
           const int len = elm->vertex_idx - start_edit;
+
+          shgrp = DRW_shgroup_create_sub(stl->g_data->shgrps_edit_point);
+          DRW_shgroup_uniform_mat4(shgrp, "gpModelMatrix", obmat);
           /* use always the same group */
-          DRW_shgroup_call_range_obmat(
-              stl->g_data->shgrps_edit_point, cache->b_edit.batch, obmat, start_edit, len);
+          DRW_shgroup_call_range(
+              stl->g_data->shgrps_edit_point, cache->b_edit.batch, start_edit, len);
 
           start_edit = elm->vertex_idx;
         }
@@ -1880,9 +1899,12 @@ static void gpencil_shgroups_create(GPENCIL_e_data *e_data,
       case eGpencilBatchGroupType_Edlin: {
         if (stl->g_data->shgrps_edit_line) {
           const int len = elm->vertex_idx - start_edlin;
+
+          shgrp = DRW_shgroup_create_sub(stl->g_data->shgrps_edit_line);
+          DRW_shgroup_uniform_mat4(shgrp, "gpModelMatrix", obmat);
           /* use always the same group */
-          DRW_shgroup_call_range_obmat(
-              stl->g_data->shgrps_edit_line, cache->b_edlin.batch, obmat, start_edlin, len);
+          DRW_shgroup_call_range(
+              stl->g_data->shgrps_edit_line, cache->b_edlin.batch, start_edlin, len);
 
           start_edlin = elm->vertex_idx;
         }
diff --git a/source/blender/draw/engines/gpencil/gpencil_engine.c b/source/blender/draw/engines/gpencil/gpencil_engine.c
index 9efae54b376..b2e8cef1db2 100644
--- a/source/blender/draw/engines/gpencil/gpencil_engine.c
+++ b/source/blender/draw/engines/gpencil/gpencil_engine.c
@@ -61,6 +61,8 @@ extern char datatoc_gpencil_edit_point_geom_glsl[];
 extern char datatoc_gpencil_edit_point_frag_glsl[];
 extern char datatoc_gpencil_blend_frag_glsl[];
 
+extern char datatoc_gpu_shader_3D_smooth_color_frag_glsl[];
+
 extern char datatoc_common_colormanagement_lib_glsl[];
 extern char datatoc_common_view_lib_glsl[];
 
@@ -221,7 +223,12 @@ static void GPENCIL_create_shaders(void)
 
   /* used for edit lines for edit modes */
   if (!e_data.gpencil_line_sh) {
-    e_data.gpencil_line_sh = GPU_shader_get_builtin_shader(GPU_SHADER_3D_FLAT_COLOR);
+    e_data.gpencil_line_sh = DRW_shader_create_with_lib(
+        datatoc_gpencil_edit_point_vert_glsl,
+        NULL,
+        datatoc_gpu_shader_3D_smooth_color_frag_glsl,
+        datatoc_common_view_lib_glsl,
+        NULL);
   }
 
   /* used to filling during drawing */
@@ -279,6 +286,7 @@ static void GPENCIL_engine_free(void)
   DRW_SHADER_FREE_SAFE(e_data.gpencil_stroke_sh);
   DRW_SHADER_FREE_SAFE(e_data.gpencil_point_sh);
   DRW_SHADER_FREE_SAFE(e_data.gpencil_edit_point_sh);
+  DRW_SHADER_FREE_SAFE(e_data.gpencil_line_sh);
   DRW_SHADER_FREE_SAFE(e_data.gpencil_fullscreen_sh);
   DRW_SHADER_FREE_SAFE(e_data.gpencil_simple_fullscreen_sh);
   DRW_SHADER_FREE_SAFE(e_data.gpencil_blend_fullscreen_sh);
@@ -834,76 +842,13 @@ static void gpencil_draw_pass_range(GPENCIL_FramebufferList *fbl,
 
   const bool do_antialiasing = ((!stl->storage->is_mat_preview) && (multi));
 
-  DRWShadingGroup *shgrp = init_shgrp;
-  DRWShadingGroup *from_shgrp = init_shgrp;
-  DRWShadingGroup *to_shgrp = init_shgrp;
-  int stencil_tot = 0;
-  bool do_last = true;
-
   if (do_antialiasing) {
     MULTISAMPLE_GP_SYNC_ENABLE(stl->storage->multisamples, fbl);
   }
 
-  /* Loop all shading groups to separate by stencil groups. */
-  while ((shgrp) && (shgrp != end_shgrp)) {
-    do_last = true;
-    /* Count number of groups using stencil. */
-    if (DRW_shgroup_stencil_mask_get(shgrp) != 0) {
-      stencil_tot++;
-    }
-
-    /* Draw stencil group and clear stencil bit. This is required because the number of
-     * shading groups can be greater than the limit of 255 stencil values.
-     * Only count as stencil if the shading group has an stencil value assigned. This reduces
-     * the number of clears because Dots, Fills and some Line strokes don't need stencil.
-     */
-    if (stencil_tot == 255) {
-      DRW_draw_pass_subset(GPENCIL_3D_DRAWMODE(ob, gpd) ? psl->stroke_pass_3d :
-                                                          psl->stroke_pass_2d,
-                           from_shgrp,
-                           to_shgrp);
-      /* Clear Stencil and prepare for next group. */
-      if (do_antialiasing) {
-        GPU_framebuffer_clear_stencil(fbl->multisample_fb, 0x0);
-      }
-      else {
-        GPU_framebuffer_clear_stencil(fb, 0x0);
-      }
-
-      /* Set new init group and reset. */
-      do_last = false;
-
-      shgrp = DRW_shgroup_get_next(shgrp);
-      if (shgrp) {
-        from_shgrp = to_shgrp = shgrp;
-        stencil_tot = 0;
-        if (shgrp != end_shgrp) {
-          continue;
-        }
-        else {
-          do_last = true;
-          break;
-        }
-      }
-      else {
-        /* No more groups. */
-        break;
-      }
-    }
-
-    /* Still below stencil group limit. */
-    shgrp = DRW_shgroup_get_next(shgrp);
-    if (shgrp) {
-      to_shgrp = shgrp;
-    }
-  }
-
-  /* Draw last pending groups. */
-  if (do_last) {
-    DRW_draw_pass_subset(GPENCIL_3D_DRAWMODE(ob, gpd) ? psl->stroke_pass_3d : psl->stroke_pass_2d,
-                         from_shgrp,
-                         to_shgrp);
-  }
+  DRW_draw_pass_subset(GPENCIL_3D_DRAWMODE(ob, gpd) ? psl->stroke_pass_3d : psl->stroke_pass_2d,
+                       init_shgrp,
+                       end_shgrp);
 
   if (do_antialiasing) {
     MULTISAMPLE_GP_SYNC_DISABLE(stl->storage->multisamples, fbl, fb, txl);
diff --git a/source/blender/draw/engines/gpencil/gpencil_engine.h b/source/blender/draw/engines/gpencil/gpencil_engine.h
index 79bcffac512..27d537c9a20 100644
--- a/source/blender/draw/engines/gpencil/gpencil_engine.h
+++ b/source/blender/draw/engines/gpencil/gpencil_engine.h
@@ -390,6 +390,7 @@ struct DRWShadingGroup *gpencil_shgroup_stroke_create(struct GPENCIL_Data *vedat
                                                       struct DRWPass *pass,
                                                       struct GPUShader *shader,
                                                       struct Object *ob,
+                                                      float (*obmat)[4],
                                                       struct bGPdata *gpd,
                                                       struct bGPDlayer *gpl,
                                                       struct bGPDstroke *gps,
diff --git a/source/blender/draw/engines/gpencil/gpencil_render.c b/source/blender/draw/engines/gpencil/gpencil_render.c
index 7ee86bcc392..8ceecbb359d 100644
--- a/source/blender/draw/engines/gpencil/gpencil_render.c
+++ b/source/blender/draw/engines/gpencil/gpencil_render.c
@@ -308,6 +308,9 @@ void GPENCIL_render_to_image(void *vedata,
   DRW_render_object_iter(vedata, engine, draw_ctx->depsgraph, GPENCIL_render_cache);
 
   GPENCIL_cache_finish(vedata);
+
+  DRW_render_instance_buffer_finish();
+
   GPENCIL_draw_scene(vedata);
 
   /* combined data */
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_edit_point_vert.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_edit_point_vert.glsl
index a1cfb2ae4ae..f75322f90e2 100644
--- a/source/blender/draw/engines/gpencil/shaders/gpencil_edit_point_vert.glsl
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_edit_point_vert.glsl
@@ -1,4 +1,6 @@
 
+uniform mat4 gpModelMatrix;
+
 in vec3 pos;
 in vec4 color;
 in float size;
@@ -8,7 +10,7 @@ out float finalThickness;
 
 void main()
 {
-  gl_Position = point_object_to_ndc(pos);
+  gl_Position = point_world_to_ndc((gpModelMatrix * vec4(pos, 1.0)).xyz);
   finalColor = color;
   finalThickness = size;
 }
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_fill_vert.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_fill_vert.glsl
index eb452f4c660..263dc570423 100644
--- a/source/blender/draw/engines/gpencil/shaders/gpencil_fill_vert.glsl
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_fill_vert.glsl
@@ -1,4 +1,6 @@
 
+uniform mat4 gpModelMatrix;
+
 in vec3 pos;
 in vec4 color;
 in vec2 texCoord;
@@ -8,7 +10,7 @@ out vec2 texCoord_interp;
 
 void main(void)
 {
-  gl_Position = point_object_to_ndc(pos);
+  gl_Position = point_world_to_ndc((gpModelMatrix * vec4(pos, 1.0)).xyz);
   finalColor = color;
   texCoord_interp = texCoord;
 }
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_point_vert.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_point_vert.glsl
index ef8b361373f..87963c66858 100644
--- a/source/blender/draw/engines/gpencil/shaders/gpencil_point_vert.glsl
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_point_vert.glsl
@@ -6,6 +6,7 @@ uniform float pixfactor;
 uniform int viewport_xray;
 uniform int shading_type[2];
 uniform vec4 wire_color;
+uniform mat4 gpModelMatrix;
 
 in vec3 pos;
 in vec4 color;
@@ -30,8 +31,8 @@ float defaultpixsize = pixsize * (1000.0 / pixfactor);
 
 void main()
 {
-  gl_Position = point_object_to_ndc(pos);
-  finalprev_pos = point_object_to_ndc(prev_pos);
+  gl_Position = point_world_to_ndc((gpModelMatrix * vec4(pos, 1.0)).xyz);
+  finalprev_pos = point_world_to_ndc((gpModelMatrix * vec4(prev_pos, 1.0)).xyz);
   finalColor = color;
 
   if (keep_size == TRUE) {
diff --git a/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_vert.glsl b/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_vert.glsl
index c7089f357f9..582b9a7f249 100644
--- a/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_vert.glsl
+++ b/source/blender/draw/engines/gpencil/shaders/gpencil_stroke_vert.glsl
@@ -6,6 +6,7 @@ uniform float pixfactor;
 uniform int viewport_xray;
 uniform int shading_type[2];
 uniform vec4 wire_color;
+uniform mat4 gpModelMatrix;
 
 in vec3 pos;
 in vec4 color;
@@ -28,7 +29,7 @@ float defaultpixsize = pixsize * (1000.0 / pixfactor);
 
 void main(void)
 {
-  gl_Position = point_object_to_ndc(pos);
+  gl_Position = point_world_to_ndc((gpModelMatrix * vec4(pos, 1.0)).xyz);
   finalColor = color;
 
   if (keep_size == TRUE) {
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_forward_depth_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_forward_depth_frag.glsl
index 505b4822ad6..abd8c1f6579 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_forward_depth_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_forward_depth_frag.glsl
@@ -1,5 +1,6 @@
-uniform int object_id = 0;
+
 layout(location = 0) out uint objectId;
+
 uniform float ImageTransparencyCutoff = 0.1;
 #ifdef V3D_SHADING_TEXTURE_COLOR
 uniform sampler2D image;
@@ -10,11 +11,10 @@ in vec2 uv_interp;
 void main()
 {
 #ifdef V3D_SHADING_TEXTURE_COLOR
-  vec4 diffuse_color = texture(image, uv_interp);
-  if (diffuse_color.a < ImageTransparencyCutoff) {
+  if (texture(image, uv_interp).a < ImageTransparencyCutoff) {
     discard;
   }
 #endif
 
-  objectId = uint(object_id);
+  objectId = uint(resource_id + 1) & 0xFFu;
 }
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_forward_transparent_accum_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_forward_transparent_accum_frag.glsl
index 3333dfeff38..f799ce41cb2 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_forward_transparent_accum_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_forward_transparent_accum_frag.glsl
@@ -8,8 +8,7 @@ uniform float alpha = 0.5;
 uniform vec2 invertedViewportSize;
 uniform vec4 viewvecs[3];
 
-uniform vec3 materialDiffuseColor;
-uniform vec3 materialSpecularColor;
+uniform vec4 materialColorAndMetal;
 uniform float materialRoughness;
 
 uniform float shadowMultiplier = 0.5;
@@ -42,17 +41,17 @@ layout(location = 1) out
 
 void main()
 {
-  vec4 diffuse_color;
+  vec4 base_color;
 
 #if defined(V3D_SHADING_TEXTURE_COLOR)
-  diffuse_color = workbench_sample_texture(image, uv_interp, imageNearest, imagePremultiplied);
-  if (diffuse_color.a < ImageTransparencyCutoff) {
+  base_color = workbench_sample_texture(image, uv_interp, imageNearest, imagePremultiplied);
+  if (base_color.a < ImageTransparencyCutoff) {
     discard;
   }
 #elif defined(V3D_SHADING_VERTEX_COLOR)
-  diffuse_color = vec4(vertexColor, 1.0);
+  base_color.rgb = vertexColor;
 #else
-  diffuse_color = vec4(materialDiffuseColor, 1.0);
+  base_color.rgb = materialColorAndMetal.rgb;
 #endif /* V3D_SHADING_TEXTURE_COLOR */
 
   vec2 uv_viewport = gl_FragCoord.xy * invertedViewportSize;
@@ -64,7 +63,7 @@ void main()
 
   /* -------- SHADING --------- */
 #ifdef V3D_LIGHTING_FLAT
-  vec3 shaded_color = diffuse_color.rgb;
+  vec3 shaded_color = base_color.rgb;
 
 #elif defined(V3D_LIGHTING_MATCAP)
   bool flipped = world_data.matcap_orientation != 0;
@@ -75,11 +74,20 @@ void main()
 #  else
   vec3 matcap_specular = vec3(0.0);
 #  endif
-  vec3 shaded_color = matcap_diffuse * diffuse_color.rgb + matcap_specular;
+  vec3 shaded_color = matcap_diffuse * base_color.rgb + matcap_specular;
 
 #elif defined(V3D_LIGHTING_STUDIO)
+#  ifdef V3D_SHADING_SPECULAR_HIGHLIGHT
+  float metallic = materialColorAndMetal.a;
+  vec3 specular_color = mix(vec3(0.05), base_color.rgb, metallic);
+  vec3 diffuse_color = mix(base_color.rgb, vec3(0.0), metallic);
+#  else
+  vec3 specular_color = vec3(0.0);
+  vec3 diffuse_color = base_color.rgb;
+#  endif
+
   vec3 shaded_color = get_world_lighting(
-      world_data, diffuse_color.rgb, materialSpecularColor, materialRoughness, nor, I_vs);
+      world_data, diffuse_color, specular_color, materialRoughness, nor, I_vs);
 #endif
 
 #ifdef V3D_SHADING_SHADOW
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_prepass_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_prepass_frag.glsl
index c673b2484de..b5f95f2dcf8 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_prepass_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_prepass_frag.glsl
@@ -1,7 +1,5 @@
-uniform int object_id = 0;
 
-uniform vec3 materialDiffuseColor;
-uniform float materialMetallic;
+uniform vec4 materialColorAndMetal;
 uniform float materialRoughness;
 
 uniform sampler2D image;
@@ -48,7 +46,7 @@ void main()
 #  elif defined(V3D_SHADING_VERTEX_COLOR)
   color.rgb = vertexColor;
 #  else
-  color.rgb = materialDiffuseColor;
+  color.rgb = materialColorAndMetal.rgb;
 #  endif
 
 #  ifdef V3D_LIGHTING_MATCAP
@@ -56,7 +54,7 @@ void main()
   metallic = float(gl_FrontFacing);
   roughness = 0.0;
 #  else
-  metallic = materialMetallic;
+  metallic = materialColorAndMetal.a;
   roughness = materialRoughness;
 #  endif
 
@@ -64,7 +62,7 @@ void main()
   /* Add some variation to the hairs to avoid uniform look. */
   float hair_variation = hair_rand * 0.1;
   color = clamp(color - hair_variation, 0.0, 1.0);
-  metallic = clamp(materialMetallic - hair_variation, 0.0, 1.0);
+  metallic = clamp(materialColorAndMetal.a - hair_variation, 0.0, 1.0);
   roughness = clamp(materialRoughness - hair_variation, 0.0, 1.0);
 #  endif
 
@@ -73,7 +71,7 @@ void main()
 #endif /* MATDATA_PASS_ENABLED */
 
 #ifdef OBJECT_ID_PASS_ENABLED
-  objectId = uint(object_id);
+  objectId = uint(resource_id + 1) & 0xFFu;
 #endif
 
 #ifdef NORMAL_VIEWPORT_PASS_ENABLED
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl b/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl
index 7eb12dbdeb9..04dd9ab85bb 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_prepass_vert.glsl
@@ -25,6 +25,10 @@ out vec2 uv_interp;
 out vec3 vertexColor;
 #endif
 
+#ifdef OBJECT_ID_PASS_ENABLED
+RESOURCE_ID_VARYING
+#endif
+
 /* From http://libnoise.sourceforge.net/noisegen/index.html */
 float integer_noise(int n)
 {
@@ -91,12 +95,18 @@ void main()
 #endif
 
 #ifdef NORMAL_VIEWPORT_PASS_ENABLED
-  normal_viewport = normal_object_to_view(nor);
 #  ifndef HAIR_SHADER
+  normal_viewport = normal_object_to_view(nor);
   normal_viewport = normalize(normal_viewport);
+#  else
+  normal_viewport = normal_world_to_view(nor);
 #  endif
 #endif
 
+#ifdef OBJECT_ID_PASS_ENABLED
+  PASS_RESOURCE_ID
+#endif
+
 #ifdef USE_WORLD_CLIP_PLANES
   world_clip_planes_calc_clip_distance(world_pos);
 #endif
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_volume_frag.glsl b/source/blender/draw/engines/workbench/shaders/workbench_volume_frag.glsl
index 4a9b0ae3b7d..c24c335189e 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_volume_frag.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_volume_frag.glsl
@@ -1,6 +1,4 @@
 
-uniform vec3 OrcoTexCoFactors[2];
-
 uniform sampler2D depthBuffer;
 
 uniform sampler3D densityTexture;
@@ -216,13 +214,13 @@ void main()
   vs_ray_dir /= abs(vs_ray_dir.z);
 
   /* TODO(fclem) Precompute the matrix/ */
-  vec3 ls_ray_dir = mat3(ViewMatrixInverse) * vs_ray_dir * OrcoTexCoFactors[1] * 2.0;
+  vec3 ls_ray_dir = mat3(ViewMatrixInverse) * vs_ray_dir * OrcoTexCoFactors[1].xyz * 2.0;
   ls_ray_dir = mat3(ModelMatrixInverse) * ls_ray_dir;
   vec3 ls_ray_ori = point_view_to_object(vs_ray_ori);
   vec3 ls_ray_end = point_view_to_object(vs_ray_end);
 
-  ls_ray_ori = (OrcoTexCoFactors[0] + ls_ray_ori * OrcoTexCoFactors[1]) * 2.0 - 1.0;
-  ls_ray_end = (OrcoTexCoFactors[0] + ls_ray_end * OrcoTexCoFactors[1]) * 2.0 - 1.0;
+  ls_ray_ori = (OrcoTexCoFactors[0].xyz + ls_ray_ori * OrcoTexCoFactors[1].xyz) * 2.0 - 1.0;
+  ls_ray_end = (OrcoTexCoFactors[0].xyz + ls_ray_end * OrcoTexCoFactors[1].xyz) * 2.0 - 1.0;
 
   /* TODO: Align rays to volume center so that it mimics old behaviour of slicing the volume. */
 
diff --git a/source/blender/draw/engines/workbench/shaders/workbench_volume_vert.glsl b/source/blender/draw/engines/workbench/shaders/workbench_volume_vert.glsl
index 6f0bb56fafd..3542a1a91fc 100644
--- a/source/blender/draw/engines/workbench/shaders/workbench_volume_vert.glsl
+++ b/source/blender/draw/engines/workbench/shaders/workbench_volume_vert.glsl
@@ -1,10 +1,11 @@
 
-uniform vec3 OrcoTexCoFactors[2];
 uniform float slicePosition;
 uniform int sliceAxis; /* -1 is no slice, 0 is X, 1 is Y, 2 is Z. */
 
 in vec3 pos;
 
+RESOURCE_ID_VARYING
+
 #ifdef VOLUME_SLICE
 in vec3 uvs;
 
@@ -27,6 +28,8 @@ void main()
 #else
   vec3 final_pos = pos;
 #endif
-  final_pos = ((final_pos * 0.5 + 0.5) - OrcoTexCoFactors[0]) / OrcoTexCoFactors[1];
+  final_pos = ((final_pos * 0.5 + 0.5) - OrcoTexCoFactors[0].xyz) / OrcoTexCoFactors[1].xyz;
   gl_Position = point_object_to_ndc(final_pos);
+
+  PASS_RESOURCE_ID
 }
diff --git a/source/blender/draw/engines/workbench/workbench_deferred.c b/source/blender/draw/engines/workbench/workbench_deferred.c
index 262ea7110a4..e41cba1d3bd 100644
--- a/source/blender/draw/engines/workbench/workbench_deferred.c
+++ b/source/blender/draw/engines/workbench/workbench_deferred.c
@@ -83,7 +83,6 @@ static struct {
   struct GPUTexture *composite_buffer_tx; /* ref only, not alloced */
 
   SceneDisplay display; /* world light direction for shadows */
-  int next_object_id;
 
   struct GPUUniformBuffer *sampling_ubo;
   struct GPUTexture *jitter_tx;
@@ -147,6 +146,7 @@ static char *workbench_build_prepass_frag(void)
 {
   DynStr *ds = BLI_dynstr_new();
 
+  BLI_dynstr_append(ds, datatoc_common_view_lib_glsl);
   BLI_dynstr_append(ds, datatoc_workbench_data_lib_glsl);
   BLI_dynstr_append(ds, datatoc_workbench_common_lib_glsl);
   BLI_dynstr_append(ds, datatoc_workbench_prepass_frag_glsl);
@@ -330,7 +330,6 @@ static struct GPUTexture *create_jitter_texture(int num_samples)
 static void workbench_init_object_data(DrawData *dd)
 {
   WORKBENCH_ObjectData *data = (WORKBENCH_ObjectData *)dd;
-  data->object_id = ((e_data.next_object_id++) & 0xff) + 1;
   data->shadow_bbox_dirty = true;
 }
 
@@ -379,11 +378,10 @@ void workbench_deferred_engine_init(WORKBENCH_Data *vedata)
     workbench_effect_info_init(stl->effects);
   }
 
-  if (!e_data.next_object_id) {
+  if (!e_data.shadow_pass_sh) {
     WORKBENCH_DEFERRED_Shaders *sh_data = &e_data.sh_data[draw_ctx->sh_cfg];
     memset(sh_data->prepass_sh_cache, 0, sizeof(sh_data->prepass_sh_cache));
     memset(e_data.composite_sh_cache, 0, sizeof(e_data.composite_sh_cache));
-    e_data.next_object_id = 1;
 #ifdef DEBUG_SHADOW_VOLUME
     const char *shadow_frag = datatoc_workbench_shadow_debug_frag_glsl;
 #else
@@ -868,18 +866,11 @@ static WORKBENCH_MaterialData *get_or_create_material_data(WORKBENCH_Data *vedat
   WORKBENCH_PassList *psl = vedata->psl;
   WORKBENCH_PrivateData *wpd = stl->g_data;
   WORKBENCH_MaterialData *material;
-  WORKBENCH_ObjectData *engine_object_data = (WORKBENCH_ObjectData *)DRW_drawdata_ensure(
-      &ob->id,
-      &draw_engine_workbench_solid,
-      sizeof(WORKBENCH_ObjectData),
-      &workbench_init_object_data,
-      NULL);
   WORKBENCH_MaterialData material_template;
   const bool is_ghost = (ob->dtx & OB_DRAWXRAY);
 
   /* Solid */
   workbench_material_update_data(wpd, ob, mat, &material_template, color_type);
-  material_template.object_id = OBJECT_ID_PASS_ENABLED(wpd) ? engine_object_data->object_id : 1;
   material_template.color_type = color_type;
   material_template.ima = ima;
   material_template.iuser = iuser;
@@ -899,8 +890,7 @@ static WORKBENCH_MaterialData *get_or_create_material_data(WORKBENCH_Data *vedat
         shader, (ob->dtx & OB_DRAWXRAY) ? psl->ghost_prepass_pass : psl->prepass_pass);
     workbench_material_copy(material, &material_template);
     DRW_shgroup_stencil_mask(material->shgrp, (ob->dtx & OB_DRAWXRAY) ? 0x00 : 0xFF);
-    DRW_shgroup_uniform_int(material->shgrp, "object_id", &material->object_id, 1);
-    workbench_material_shgroup_uniform(wpd, material->shgrp, material, ob, true, true, interp);
+    workbench_material_shgroup_uniform(wpd, material->shgrp, material, ob, true, interp);
     BLI_ghash_insert(wpd->material_hash, POINTER_FROM_UINT(hash), material);
   }
   return material;
@@ -943,8 +933,7 @@ static void workbench_cache_populate_particles(WORKBENCH_Data *vedata, Object *o
           (ob->dtx & OB_DRAWXRAY) ? psl->ghost_prepass_hair_pass : psl->prepass_hair_pass,
           shader);
       DRW_shgroup_stencil_mask(shgrp, (ob->dtx & OB_DRAWXRAY) ? 0x00 : 0xFF);
-      DRW_shgroup_uniform_int(shgrp, "object_id", &material->object_id, 1);
-      workbench_material_shgroup_uniform(wpd, shgrp, material, ob, true, true, interp);
+      workbench_material_shgroup_uniform(wpd, shgrp, material, ob, true, interp);
     }
   }
 }
diff --git a/source/blender/draw/engines/workbench/workbench_forward.c b/source/blender/draw/engines/workbench/workbench_forward.c
index 1cbc60ef858..890359e8fda 100644
--- a/source/blender/draw/engines/workbench/workbench_forward.c
+++ b/source/blender/draw/engines/workbench/workbench_forward.c
@@ -63,8 +63,6 @@ static struct {
   struct GPUTexture *transparent_accum_tx;     /* ref only, not alloced */
   struct GPUTexture *transparent_revealage_tx; /* ref only, not alloced */
   struct GPUTexture *composite_buffer_tx;      /* ref only, not alloced */
-
-  int next_object_id;
 } e_data = {{{{NULL}}}};
 
 /* Shaders */
@@ -98,6 +96,18 @@ static char *workbench_build_forward_vert(bool is_hair)
   return str;
 }
 
+static char *workbench_build_forward_outline_frag(void)
+{
+  DynStr *ds = BLI_dynstr_new();
+
+  BLI_dynstr_append(ds, datatoc_common_view_lib_glsl);
+  BLI_dynstr_append(ds, datatoc_workbench_forward_depth_frag_glsl);
+
+  char *str = BLI_dynstr_get_cstring(ds);
+  BLI_dynstr_free(ds);
+  return str;
+}
+
 static char *workbench_build_forward_transparent_accum_frag(void)
 {
   DynStr *ds = BLI_dynstr_new();
@@ -129,12 +139,6 @@ static char *workbench_build_forward_composite_frag(void)
   return str;
 }
 
-static void workbench_init_object_data(DrawData *dd)
-{
-  WORKBENCH_ObjectData *data = (WORKBENCH_ObjectData *)dd;
-  data->object_id = ((e_data.next_object_id++) & 0xff) + 1;
-}
-
 WORKBENCH_MaterialData *workbench_forward_get_or_create_material_data(WORKBENCH_Data *vedata,
                                                                       Object *ob,
                                                                       Material *mat,
@@ -149,18 +153,11 @@ WORKBENCH_MaterialData *workbench_forward_get_or_create_material_data(WORKBENCH_
   WORKBENCH_PassList *psl = vedata->psl;
   WORKBENCH_PrivateData *wpd = stl->g_data;
   WORKBENCH_MaterialData *material;
-  WORKBENCH_ObjectData *engine_object_data = (WORKBENCH_ObjectData *)DRW_drawdata_ensure(
-      &ob->id,
-      &draw_engine_workbench_solid,
-      sizeof(WORKBENCH_ObjectData),
-      &workbench_init_object_data,
-      NULL);
   WORKBENCH_MaterialData material_template;
   DRWShadingGroup *grp;
 
   /* Solid */
   workbench_material_update_data(wpd, ob, mat, &material_template, color_type);
-  material_template.object_id = OBJECT_ID_PASS_ENABLED(wpd) ? engine_object_data->object_id : 1;
   material_template.color_type = color_type;
   material_template.ima = ima;
   material_template.iuser = iuser;
@@ -205,7 +202,7 @@ WORKBENCH_MaterialData *workbench_forward_get_or_create_material_data(WORKBENCH_
       DRW_shgroup_uniform_float_copy(grp, "shadowFocus", wpd->shadow_focus);
     }
 
-    workbench_material_shgroup_uniform(wpd, grp, material, ob, false, false, interp);
+    workbench_material_shgroup_uniform(wpd, grp, material, ob, false, interp);
     material->shgrp = grp;
 
     /* Depth */
@@ -219,8 +216,6 @@ WORKBENCH_MaterialData *workbench_forward_get_or_create_material_data(WORKBENCH_
       material->shgrp_object_outline = DRW_shgroup_create(sh_data->object_outline_sh,
                                                           psl->object_outline_pass);
     }
-    material->object_id = engine_object_data->object_id;
-    DRW_shgroup_uniform_int(material->shgrp_object_outline, "object_id", &material->object_id, 1);
     if (draw_ctx->sh_cfg == GPU_SHADER_CFG_CLIPPED) {
       DRW_shgroup_state_enable(material->shgrp_object_outline, DRW_STATE_CLIP_PLANES);
     }
@@ -292,26 +287,30 @@ void workbench_forward_outline_shaders_ensure(WORKBENCH_PrivateData *wpd, eGPUSh
     char *defines_texture = workbench_material_build_defines(wpd, true, false, false);
     char *defines_hair = workbench_material_build_defines(wpd, false, true, false);
     char *forward_vert = workbench_build_forward_vert(false);
+    char *forward_frag = workbench_build_forward_outline_frag();
     char *forward_hair_vert = workbench_build_forward_vert(true);
 
+    const char *define_id_pass = "#define OBJECT_ID_PASS_ENABLED\n";
+
     sh_data->object_outline_sh = GPU_shader_create_from_arrays({
         .vert = (const char *[]){sh_cfg_data->lib, forward_vert, NULL},
-        .frag = (const char *[]){datatoc_workbench_forward_depth_frag_glsl, NULL},
-        .defs = (const char *[]){sh_cfg_data->def, defines, NULL},
+        .frag = (const char *[]){forward_frag, NULL},
+        .defs = (const char *[]){sh_cfg_data->def, defines, define_id_pass, NULL},
     });
     sh_data->object_outline_texture_sh = GPU_shader_create_from_arrays({
         .vert = (const char *[]){sh_cfg_data->lib, forward_vert, NULL},
-        .frag = (const char *[]){datatoc_workbench_forward_depth_frag_glsl, NULL},
-        .defs = (const char *[]){sh_cfg_data->def, defines_texture, NULL},
+        .frag = (const char *[]){forward_frag, NULL},
+        .defs = (const char *[]){sh_cfg_data->def, defines_texture, define_id_pass, NULL},
     });
     sh_data->object_outline_hair_sh = GPU_shader_create_from_arrays({
         .vert = (const char *[]){sh_cfg_data->lib, forward_hair_vert, NULL},
-        .frag = (const char *[]){datatoc_workbench_forward_depth_frag_glsl, NULL},
-        .defs = (const char *[]){sh_cfg_data->def, defines_hair, NULL},
+        .frag = (const char *[]){forward_frag, NULL},
+        .defs = (const char *[]){sh_cfg_data->def, defines_hair, define_id_pass, NULL},
     });
 
     MEM_freeN(forward_hair_vert);
     MEM_freeN(forward_vert);
+    MEM_freeN(forward_frag);
     MEM_freeN(defines);
     MEM_freeN(defines_texture);
     MEM_freeN(defines_hair);
@@ -527,7 +526,7 @@ static void workbench_forward_cache_populate_particles(WORKBENCH_Data *vedata, O
       DRWShadingGroup *shgrp = DRW_shgroup_hair_create(
           ob, psys, md, psl->transparent_accum_pass, shader);
       DRW_shgroup_uniform_block(shgrp, "world_block", wpd->world_ubo);
-      workbench_material_shgroup_uniform(wpd, shgrp, material, ob, false, false, interp);
+      workbench_material_shgroup_uniform(wpd, shgrp, material, ob, false, interp);
       DRW_shgroup_uniform_vec4(shgrp, "viewvecs[0]", (float *)wpd->viewvecs, 3);
       /* Hairs have lots of layer and can rapidly become the most prominent surface.
        * So lower their alpha artificially. */
@@ -551,7 +550,6 @@ static void workbench_forward_cache_populate_particles(WORKBENCH_Data *vedata, O
       WORKBENCH_FORWARD_Shaders *sh_data = &e_data.sh_data[draw_ctx->sh_cfg];
       shgrp = DRW_shgroup_hair_create(
           ob, psys, md, vedata->psl->object_outline_pass, sh_data->object_outline_hair_sh);
-      DRW_shgroup_uniform_int(shgrp, "object_id", &material->object_id, 1);
     }
   }
 }
diff --git a/source/blender/draw/engines/workbench/workbench_materials.c b/source/blender/draw/engines/workbench/workbench_materials.c
index e050877187e..c90604678db 100644
--- a/source/blender/draw/engines/workbench/workbench_materials.c
+++ b/source/blender/draw/engines/workbench/workbench_materials.c
@@ -44,20 +44,15 @@ void workbench_material_update_data(WORKBENCH_PrivateData *wpd,
                                     WORKBENCH_MaterialData *data,
                                     int color_type)
 {
-  copy_v3_fl3(data->diffuse_color, 0.8f, 0.8f, 0.8f);
-  copy_v3_v3(data->base_color, data->diffuse_color);
-  copy_v3_fl3(data->specular_color, 0.05f, 0.05f, 0.05f); /* Dielectric: 5% reflective. */
   data->metallic = 0.0f;
   data->roughness = 0.632455532f; /* sqrtf(0.4f); */
   data->alpha = wpd->shading.xray_alpha;
 
   if (color_type == V3D_SHADING_SINGLE_COLOR) {
-    copy_v3_v3(data->diffuse_color, wpd->shading.single_color);
-    copy_v3_v3(data->base_color, data->diffuse_color);
+    copy_v3_v3(data->base_color, wpd->shading.single_color);
   }
   else if (color_type == V3D_SHADING_ERROR_COLOR) {
-    copy_v3_fl3(data->diffuse_color, 0.8, 0.0, 0.8);
-    copy_v3_v3(data->base_color, data->diffuse_color);
+    copy_v3_fl3(data->base_color, 0.8, 0.0, 0.8);
   }
   else if (color_type == V3D_SHADING_RANDOM_COLOR) {
     uint hash = BLI_ghashutil_strhash_p_murmur(ob->id.name);
@@ -67,30 +62,24 @@ void workbench_material_update_data(WORKBENCH_PrivateData *wpd,
 
     float hue = BLI_hash_int_01(hash);
     float hsv[3] = {hue, HSV_SATURATION, HSV_VALUE};
-    hsv_to_rgb_v(hsv, data->diffuse_color);
-    copy_v3_v3(data->base_color, data->diffuse_color);
+    hsv_to_rgb_v(hsv, data->base_color);
   }
   else if (ELEM(color_type, V3D_SHADING_OBJECT_COLOR, V3D_SHADING_VERTEX_COLOR)) {
-    copy_v3_v3(data->diffuse_color, ob->color);
-    copy_v3_v3(data->base_color, data->diffuse_color);
     data->alpha *= ob->color[3];
+    copy_v3_v3(data->base_color, ob->color);
   }
   else {
     /* V3D_SHADING_MATERIAL_COLOR or V3D_SHADING_TEXTURE_COLOR */
     if (mat) {
       data->alpha *= mat->a;
+      copy_v3_v3(data->base_color, &mat->r);
       if (workbench_is_specular_highlight_enabled(wpd)) {
-        copy_v3_v3(data->base_color, &mat->r);
-        mul_v3_v3fl(data->diffuse_color, &mat->r, 1.0f - mat->metallic);
-        mul_v3_v3fl(data->specular_color, &mat->r, mat->metallic);
-        add_v3_fl(data->specular_color, 0.05f * (1.0f - mat->metallic));
         data->metallic = mat->metallic;
         data->roughness = sqrtf(mat->roughness); /* Remap to disney roughness. */
       }
-      else {
-        copy_v3_v3(data->base_color, &mat->r);
-        copy_v3_v3(data->diffuse_color, &mat->r);
-      }
+    }
+    else {
+      copy_v3_fl(data->base_color, 0.8f);
     }
   }
 }
@@ -160,34 +149,40 @@ char *workbench_material_build_defines(WORKBENCH_PrivateData *wpd,
   return str;
 }
 
-uint workbench_material_get_hash(WORKBENCH_MaterialData *material_template, bool is_ghost)
+uint workbench_material_get_hash(WORKBENCH_MaterialData *mat, bool is_ghost)
 {
-  uint input[4];
-  uint result;
-  float *color = material_template->diffuse_color;
-  input[0] = (uint)(color[0] * 512);
-  input[1] = (uint)(color[1] * 512);
-  input[2] = (uint)(color[2] * 512);
-  input[3] = material_template->object_id;
-  result = BLI_ghashutil_uinthash_v4_murmur(input);
-
-  color = material_template->specular_color;
-  input[0] = (uint)(color[0] * 512);
-  input[1] = (uint)(color[1] * 512);
-  input[2] = (uint)(color[2] * 512);
-  input[3] = (uint)(material_template->roughness * 512);
-  result += BLI_ghashutil_uinthash_v4_murmur(input);
-
-  result += BLI_ghashutil_uinthash((uint)(material_template->alpha * 512));
-  result += BLI_ghashutil_uinthash((uint)is_ghost);
-  result += BLI_ghashutil_uinthash(material_template->color_type);
-
-  /* add texture reference */
-  if (material_template->ima) {
-    result += BLI_ghashutil_inthash_p_murmur(material_template->ima);
-  }
-
-  return result;
+  union {
+    struct {
+      /* WHATCH: Keep in sync with View3DShading.color_type max value. */
+      uchar color_type;
+      uchar diff_r;
+      uchar diff_g;
+      uchar diff_b;
+
+      uchar alpha;
+      uchar ghost;
+      uchar metal;
+      uchar roughness;
+
+      void *ima;
+    };
+    /* HACK to ensure input is 4 uint long. */
+    uint a[4];
+  } input = {.color_type = (uchar)(mat->color_type),
+             .diff_r = (uchar)(mat->base_color[0] * 0xFF),
+             .diff_g = (uchar)(mat->base_color[1] * 0xFF),
+             .diff_b = (uchar)(mat->base_color[2] * 0xFF),
+
+             .alpha = (uint)(mat->alpha * 0xFF),
+             .ghost = (uchar)is_ghost,
+             .metal = (uchar)(mat->metallic * 0xFF),
+             .roughness = (uchar)(mat->roughness * 0xFF),
+
+             .ima = mat->ima};
+
+  BLI_assert(sizeof(input) == sizeof(uint) * 4);
+
+  return BLI_ghashutil_uinthash_v4((uint *)&input);
 }
 
 int workbench_material_get_composite_shader_index(WORKBENCH_PrivateData *wpd)
@@ -315,35 +310,28 @@ void workbench_material_shgroup_uniform(WORKBENCH_PrivateData *wpd,
                                         DRWShadingGroup *grp,
                                         WORKBENCH_MaterialData *material,
                                         Object *ob,
-                                        const bool use_metallic,
                                         const bool deferred,
                                         const int interp)
 {
-  if (!deferred || workbench_is_matdata_pass_enabled(wpd)) {
-    if (workbench_material_determine_color_type(wpd, material->ima, ob, false) ==
-        V3D_SHADING_TEXTURE_COLOR) {
-      GPUTexture *tex = GPU_texture_from_blender(material->ima, material->iuser, GL_TEXTURE_2D);
-      DRW_shgroup_uniform_texture(grp, "image", tex);
-      DRW_shgroup_uniform_bool_copy(
-          grp, "imagePremultiplied", (material->ima->alpha_mode == IMA_ALPHA_PREMUL));
-      DRW_shgroup_uniform_bool_copy(grp, "imageNearest", (interp == SHD_INTERP_CLOSEST));
-    }
-    else {
-      DRW_shgroup_uniform_vec3(grp,
-                               "materialDiffuseColor",
-                               (use_metallic) ? material->base_color : material->diffuse_color,
-                               1);
-    }
+  if (!(!deferred || workbench_is_matdata_pass_enabled(wpd))) {
+    return;
+  }
 
-    if (workbench_is_specular_highlight_enabled(wpd)) {
-      if (use_metallic) {
-        DRW_shgroup_uniform_float(grp, "materialMetallic", &material->metallic, 1);
-      }
-      else {
-        DRW_shgroup_uniform_vec3(grp, "materialSpecularColor", material->specular_color, 1);
-      }
-      DRW_shgroup_uniform_float(grp, "materialRoughness", &material->roughness, 1);
-    }
+  const bool use_highlight = workbench_is_specular_highlight_enabled(wpd);
+  const bool use_texture = (V3D_SHADING_TEXTURE_COLOR == workbench_material_determine_color_type(
+                                                             wpd, material->ima, ob, false));
+  if (use_texture) {
+    GPUTexture *tex = GPU_texture_from_blender(material->ima, material->iuser, GL_TEXTURE_2D);
+    DRW_shgroup_uniform_texture(grp, "image", tex);
+    DRW_shgroup_uniform_bool_copy(
+        grp, "imagePremultiplied", (material->ima->alpha_mode == IMA_ALPHA_PREMUL));
+    DRW_shgroup_uniform_bool_copy(grp, "imageNearest", (interp == SHD_INTERP_CLOSEST));
+  }
+
+  DRW_shgroup_uniform_vec4(grp, "materialColorAndMetal", material->base_color, 1);
+
+  if (use_highlight) {
+    DRW_shgroup_uniform_float(grp, "materialRoughness", &material->roughness, 1);
   }
 
   if (WORLD_CLIPPING_ENABLED(wpd)) {
@@ -354,10 +342,7 @@ void workbench_material_shgroup_uniform(WORKBENCH_PrivateData *wpd,
 void workbench_material_copy(WORKBENCH_MaterialData *dest_material,
                              const WORKBENCH_MaterialData *source_material)
 {
-  dest_material->object_id = source_material->object_id;
   copy_v3_v3(dest_material->base_color, source_material->base_color);
-  copy_v3_v3(dest_material->diffuse_color, source_material->diffuse_color);
-  copy_v3_v3(dest_material->specular_color, source_material->specular_color);
   dest_material->metallic = source_material->metallic;
   dest_material->roughness = source_material->roughness;
   dest_material->ima = source_material->ima;
diff --git a/source/blender/draw/engines/workbench/workbench_private.h b/source/blender/draw/engines/workbench/workbench_private.h
index d880d5d58b5..f51da581827 100644
--- a/source/blender/draw/engines/workbench/workbench_private.h
+++ b/source/blender/draw/engines/workbench/workbench_private.h
@@ -281,13 +281,8 @@ typedef struct WORKBENCH_EffectInfo {
 } WORKBENCH_EffectInfo;
 
 typedef struct WORKBENCH_MaterialData {
-  float base_color[3];
-  float diffuse_color[3];
-  float specular_color[3];
-  float alpha;
-  float metallic;
-  float roughness;
-  int object_id;
+  float base_color[3], metallic;
+  float roughness, alpha;
   int color_type;
   int interp;
   Image *ima;
@@ -308,8 +303,6 @@ typedef struct WORKBENCH_ObjectData {
   float shadow_min[3], shadow_max[3];
   BoundBox shadow_bbox;
   bool shadow_bbox_dirty;
-
-  int object_id;
 } WORKBENCH_ObjectData;
 
 /* inline helper functions */
@@ -500,7 +493,6 @@ void workbench_material_shgroup_uniform(WORKBENCH_PrivateData *wpd,
                                         DRWShadingGroup *grp,
                                         WORKBENCH_MaterialData *material,
                                         Object *ob,
-                                        const bool use_metallic,
                                         const bool deferred,
                                         const int interp);
 void workbench_material_copy(WORKBENCH_MaterialData *dest_material,
diff --git a/source/blender/draw/engines/workbench/workbench_volume.c b/source/blender/draw/engines/workbench/workbench_volume.c
index 7ae9d90daff..e017661b6cd 100644
--- a/source/blender/draw/engines/workbench/workbench_volume.c
+++ b/source/blender/draw/engines/workbench/workbench_volume.c
@@ -27,6 +27,7 @@
 
 #include "BLI_rand.h"
 #include "BLI_dynstr.h"
+#include "BLI_string_utils.h"
 
 #include "DNA_modifier_types.h"
 #include "DNA_object_force_types.h"
@@ -54,6 +55,7 @@ static struct {
 extern char datatoc_workbench_volume_vert_glsl[];
 extern char datatoc_workbench_volume_frag_glsl[];
 extern char datatoc_common_view_lib_glsl[];
+extern char datatoc_gpu_shader_common_obinfos_lib_glsl[];
 
 static GPUShader *volume_shader_get(bool slice, bool coba, bool cubic)
 {
@@ -78,12 +80,16 @@ static GPUShader *volume_shader_get(bool slice, bool coba, bool cubic)
     char *defines = BLI_dynstr_get_cstring(ds);
     BLI_dynstr_free(ds);
 
+    char *libs = BLI_string_joinN(datatoc_common_view_lib_glsl,
+                                  datatoc_gpu_shader_common_obinfos_lib_glsl);
+
     e_data.volume_sh[id] = DRW_shader_create_with_lib(datatoc_workbench_volume_vert_glsl,
                                                       NULL,
                                                       datatoc_workbench_volume_frag_glsl,
-                                                      datatoc_common_view_lib_glsl,
+                                                      libs,
                                                       defines);
 
+    MEM_freeN(libs);
     MEM_freeN(defines);
   }