Workbench: Opti: Only request OIT buffers if needed

diff --git a/source/blender/draw/engines/workbench/workbench_deferred.c b/source/blender/draw/engines/workbench/workbench_deferred.c
index 3f8a29a20a5b807e6cccbe4e4bcfc7f585202178..4e0ec0259c22c4e84bf545a82e14fcc9561696f5 100644 (file)
--- a/source/blender/draw/engines/workbench/workbench_deferred.c
+++ b/source/blender/draw/engines/workbench/workbench_deferred.c
@@ -339,6 +339,19 @@ static void workbench_init_object_data(DrawData *dd)
        data->shadow_bbox_dirty = true;
 }
 
+static void workbench_init_oit_framebuffer(WORKBENCH_FramebufferList *fbl, DefaultTextureList *dtxl)
+{
+       const float *size = DRW_viewport_size_get();
+       e_data.oit_accum_tx = DRW_texture_pool_query_2D(size[0], size[1], GPU_RGBA16F, &draw_engine_workbench_solid);
+       e_data.oit_revealage_tx = DRW_texture_pool_query_2D(size[0], size[1], GPU_R16F, &draw_engine_workbench_solid);
+
+       GPU_framebuffer_ensure_config(&fbl->transparent_accum_fb, {
+               GPU_ATTACHMENT_TEXTURE(dtxl->depth),
+               GPU_ATTACHMENT_TEXTURE(e_data.oit_accum_tx),
+               GPU_ATTACHMENT_TEXTURE(e_data.oit_revealage_tx),
+       });
+}
+
 void workbench_deferred_engine_init(WORKBENCH_Data *vedata)
 {
        WORKBENCH_FramebufferList *fbl = vedata->fbl;
@@ -460,10 +473,6 @@ void workbench_deferred_engine_init(WORKBENCH_Data *vedata)
                if (CAVITY_ENABLED(wpd)) {
                        e_data.cavity_buffer_tx = DRW_texture_pool_query_2D(size[0], size[1], GPU_R16, &draw_engine_workbench_solid);
                }
-               if (OIT_ENABLED(wpd)) {
-                       e_data.oit_accum_tx = DRW_texture_pool_query_2D(size[0], size[1], GPU_RGBA16F, &draw_engine_workbench_solid);
-                       e_data.oit_revealage_tx = DRW_texture_pool_query_2D(size[0], size[1], GPU_R16F, &draw_engine_workbench_solid);
-               }
 
                GPU_framebuffer_ensure_config(&fbl->prepass_fb, {
                        GPU_ATTACHMENT_TEXTURE(dtxl->depth),
@@ -499,13 +508,6 @@ void workbench_deferred_engine_init(WORKBENCH_Data *vedata)
                                GPU_ATTACHMENT_TEXTURE(e_data.object_id_tx),
                        });
                }
-               if (OIT_ENABLED(wpd)) {
-                       GPU_framebuffer_ensure_config(&fbl->transparent_accum_fb, {
-                               GPU_ATTACHMENT_TEXTURE(dtxl->depth),
-                               GPU_ATTACHMENT_TEXTURE(e_data.oit_accum_tx),
-                               GPU_ATTACHMENT_TEXTURE(e_data.oit_revealage_tx),
-                       });
-               }
        }
 
        {
@@ -1180,7 +1182,11 @@ void workbench_deferred_draw_scene(WORKBENCH_Data *vedata)
        GPU_framebuffer_bind(fbl->composite_fb);
        DRW_draw_pass(psl->background_pass);
 
-       if (OIT_ENABLED(wpd)) {
+       if (OIT_ENABLED(wpd) && !DRW_pass_is_empty(psl->transparent_accum_pass)) {
+               DefaultTextureList *dtxl = DRW_viewport_texture_list_get();
+               /* meh, late init to not request buffers we won't use. */
+               workbench_init_oit_framebuffer(fbl, dtxl);
+
                const float clear_color[4] = {0.0f, 0.0f, 0.0f, 1.0f};
                GPU_framebuffer_bind(fbl->transparent_accum_fb);
                GPU_framebuffer_clear_color(fbl->transparent_accum_fb, clear_color);