DRW : Add new view_update mechanism.

This makes updates for the viewport cleaner and also add the possibility to add a new callback called when the scene is updated.

source/blender/draw/DRW_engine.h

@@ -66,6 +66,8 @@ void DRW_engine_viewport_data_size_get(
         const void *engine_type,
         int *r_fbl_len, int *r_txl_len, int *r_psl_len, int *r_stl_len);
 
+void DRW_notify_view_update(const struct bContext *C);
+
 void DRW_draw_view(const struct bContext *C);
 
 void DRW_draw_render_loop_ex(

source/blender/draw/engines/basic/basic_engine.c

@@ -261,7 +261,8 @@ DrawEngineType draw_engine_basic_type = {
 	&BASIC_cache_populate,
 	&BASIC_cache_finish,
 	NULL,
-	&BASIC_draw_scene
+	&BASIC_draw_scene,
+	NULL,
 };
 
 /* Note: currently unused, we may want to register so we can see this when debugging the view. */

source/blender/draw/engines/clay/clay_engine.c

@@ -923,7 +923,8 @@ DrawEngineType draw_engine_clay_type = {
 	&CLAY_cache_populate,
 	&CLAY_cache_finish,
 	NULL,
-	&CLAY_draw_scene
+	&CLAY_draw_scene,
+	NULL,
 };
 
 RenderEngineType DRW_engine_viewport_clay_type = {

source/blender/draw/engines/external/external_engine.c

@@ -216,7 +216,8 @@ DrawEngineType draw_engine_external_type = {
 	&EXTERNAL_cache_populate,
 	&EXTERNAL_cache_finish,
 	NULL,
-	&EXTERNAL_draw_scene
+	&EXTERNAL_draw_scene,
+	NULL,
 };
 
 /* Note: currently unused, we should not register unless we want to see this when debugging the view. */

source/blender/draw/intern/DRW_render.h

@@ -136,6 +136,8 @@ typedef struct DrawEngineType {
 
 	void (*draw_background)(void *vedata);
 	void (*draw_scene)(void *vedata);
+
+	void (*view_update)(void *vedata);
 } DrawEngineType;
 
 #ifndef __DRW_ENGINE_H__

source/blender/draw/intern/draw_manager.c

@@ -2549,6 +2549,8 @@ static void DRW_viewport_var_init(void)
 	if (RST.bound_tex_slots == NULL) {
 		RST.bound_tex_slots = MEM_callocN(sizeof(bool) * GPU_max_textures(), "Bound Texture Slots");
 	}
+
+	memset(viewport_matrix_override.override, 0x0, sizeof(viewport_matrix_override.override));
 }
 
 void DRW_viewport_matrix_get(float mat[4][4], DRWViewportMatrixType type)
@@ -2615,8 +2617,7 @@ DefaultTextureList *DRW_viewport_texture_list_get(void)
 
 void DRW_viewport_request_redraw(void)
 {
-	/* XXXXXXXXXXX HAAAAAAAACKKKK */
-	WM_main_add_notifier(NC_MATERIAL | ND_SHADING_DRAW, NULL);
+	GPU_viewport_tag_update(DST.viewport);
 }
 
 /** \} */
@@ -3138,6 +3139,50 @@ static void DRW_debug_gpu_stats(void)
 	DRW_stats_draw(&rect);
 }
 
+/* -------------------------------------------------------------------- */
+
+/** \name View Update
+ * \{ */
+
+void DRW_notify_view_update(const bContext *C)
+{
+	struct Depsgraph *graph = CTX_data_depsgraph(C);
+	ARegion *ar = CTX_wm_region(C);
+	View3D *v3d = CTX_wm_view3d(C);
+	RegionView3D *rv3d = ar->regiondata;
+	Scene *scene = DEG_get_evaluated_scene(graph);
+	SceneLayer *sl = DEG_get_evaluated_scene_layer(graph);
+
+	if (rv3d->viewport == NULL) {
+		return;
+	}
+
+
+	/* Reset before using it. */
+	memset(&DST, 0x0, sizeof(DST));
+
+	DST.viewport = rv3d->viewport;
+	DST.draw_ctx = (DRWContextState){
+		ar, rv3d, v3d, scene, sl, OBACT_NEW(sl), C,
+	};
+
+	DRW_engines_enable(scene, sl);
+
+	for (LinkData *link = DST.enabled_engines.first; link; link = link->next) {
+		DrawEngineType *engine = link->data;
+		ViewportEngineData *data = DRW_viewport_engine_data_get(engine);
+
+		if (engine->view_update) {
+			engine->view_update(data);
+		}
+	}
+
+	DST.viewport = NULL;
+
+	DRW_engines_disable();
+}
+
+/** \} */
 
 /* -------------------------------------------------------------------- */
 

source/blender/draw/modes/edit_armature_mode.c

@@ -152,5 +152,6 @@ DrawEngineType draw_engine_edit_armature_type = {
 	&EDIT_ARMATURE_cache_populate,
 	NULL,
 	NULL,
-	&EDIT_ARMATURE_draw_scene
+	&EDIT_ARMATURE_draw_scene,
+	NULL,
 };

source/blender/draw/modes/edit_curve_mode.c

@@ -329,5 +329,6 @@ DrawEngineType draw_engine_edit_curve_type = {
 	&EDIT_CURVE_cache_populate,
 	&EDIT_CURVE_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&EDIT_CURVE_draw_scene
+	&EDIT_CURVE_draw_scene,
+	NULL,
 };

source/blender/draw/modes/edit_lattice_mode.c

@@ -292,5 +292,6 @@ DrawEngineType draw_engine_edit_lattice_type = {
 	&EDIT_LATTICE_cache_populate,
 	&EDIT_LATTICE_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&EDIT_LATTICE_draw_scene
+	&EDIT_LATTICE_draw_scene,
+	NULL,
 };

source/blender/draw/modes/edit_mesh_mode.c

@@ -593,5 +593,6 @@ DrawEngineType draw_engine_edit_mesh_type = {
 	&EDIT_MESH_cache_populate,
 	NULL,
 	NULL,
-	&EDIT_MESH_draw_scene
+	&EDIT_MESH_draw_scene,
+	NULL,
 };

source/blender/draw/modes/edit_metaball_mode.c

@@ -264,5 +264,6 @@ DrawEngineType draw_engine_edit_metaball_type = {
 	&EDIT_METABALL_cache_populate,
 	&EDIT_METABALL_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&EDIT_METABALL_draw_scene
+	&EDIT_METABALL_draw_scene,
+	NULL,
 };

source/blender/draw/modes/edit_surface_mode.c

@@ -264,5 +264,6 @@ DrawEngineType draw_engine_edit_surface_type = {
 	&EDIT_SURFACE_cache_populate,
 	&EDIT_SURFACE_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&EDIT_SURFACE_draw_scene
+	&EDIT_SURFACE_draw_scene,
+	NULL,
 };

source/blender/draw/modes/edit_text_mode.c

@@ -307,5 +307,6 @@ DrawEngineType draw_engine_edit_text_type = {
 	&EDIT_TEXT_cache_populate,
 	&EDIT_TEXT_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&EDIT_TEXT_draw_scene
+	&EDIT_TEXT_draw_scene,
+	NULL,
 };

source/blender/draw/modes/object_mode.c

@@ -1876,5 +1876,6 @@ DrawEngineType draw_engine_object_type = {
 	&OBJECT_cache_populate,
 	NULL,
 	NULL,
-	&OBJECT_draw_scene
+	&OBJECT_draw_scene,
+	NULL,
 };

source/blender/draw/modes/paint_texture_mode.c

@@ -412,5 +412,6 @@ DrawEngineType draw_engine_paint_texture_type = {
 	&PAINT_TEXTURE_cache_populate,
 	&PAINT_TEXTURE_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&PAINT_TEXTURE_draw_scene
+	&PAINT_TEXTURE_draw_scene,
+	NULL,
 };

source/blender/draw/modes/paint_vertex_mode.c

@@ -211,5 +211,6 @@ DrawEngineType draw_engine_paint_vertex_type = {
 	&PAINT_VERTEX_cache_populate,
 	NULL,
 	NULL,
-	&PAINT_VERTEX_draw_scene
+	&PAINT_VERTEX_draw_scene,
+	NULL,
 };

source/blender/draw/modes/paint_weight_mode.c

@@ -249,5 +249,6 @@ DrawEngineType draw_engine_paint_weight_type = {
 	&PAINT_WEIGHT_cache_populate,
 	NULL,
 	NULL,
-	&PAINT_WEIGHT_draw_scene
+	&PAINT_WEIGHT_draw_scene,
+	NULL,
 };

source/blender/draw/modes/particle_mode.c

@@ -259,5 +259,6 @@ DrawEngineType draw_engine_particle_type = {
 	&PARTICLE_cache_populate,
 	&PARTICLE_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&PARTICLE_draw_scene
+	&PARTICLE_draw_scene,
+	NULL,
 };

source/blender/draw/modes/pose_mode.c

@@ -193,5 +193,6 @@ DrawEngineType draw_engine_pose_type = {
 	&POSE_cache_populate,
 	NULL,
 	NULL,
-	&POSE_draw_scene
+	&POSE_draw_scene,
+	NULL,
 };

source/blender/draw/modes/sculpt_mode.c

@@ -300,5 +300,6 @@ DrawEngineType draw_engine_sculpt_type = {
 	&SCULPT_cache_populate,
 	&SCULPT_cache_finish,
 	NULL, /* draw_background but not needed by mode engines */
-	&SCULPT_draw_scene
+	&SCULPT_draw_scene,
+	NULL,
 };

source/blender/editors/render/CMakeLists.txt

@@ -25,6 +25,7 @@ set(INC
 	../../blenloader
 	../../blentranslation
 	../../depsgraph
+	../../draw
 	../../gpu
 	../../imbuf
 	../../bmesh

source/blender/editors/render/render_update.c

@@ -41,6 +41,8 @@
 #include "DNA_world_types.h"
 #include "DNA_windowmanager_types.h"
 
+#include "DRW_engine.h"
+
 #include "BLI_listbase.h"
 #include "BLI_threads.h"
 #include "BLI_utildefines.h"
@@ -137,6 +139,16 @@ void ED_render_scene_update(Main *bmain, Scene *scene, int updated)
 
 					engine->flag &= ~RE_ENGINE_DO_UPDATE;
 					engine->type->view_update(engine, C);
+
+				}
+				else if ((RE_engines_find(scene->r.engine)->flag & RE_USE_LEGACY_PIPELINE) == 0) {
+					if (updated) {
+						CTX_wm_screen_set(C, sc);
+						CTX_wm_area_set(C, sa);
+						CTX_wm_region_set(C, ar);
+
+						DRW_notify_view_update(C);
+					}
 				}
 			}
 		}

source/blender/gpu/GPU_viewport.h

@@ -101,6 +101,9 @@ void *GPU_viewport_texture_list_get(GPUViewport *viewport);
 void  GPU_viewport_size_get(const GPUViewport *viewport, int size[2]);
 void  GPU_viewport_size_set(GPUViewport *viewport, const int size[2]);
 
+void GPU_viewport_tag_update(GPUViewport *viewport);
+bool GPU_viewport_do_update(GPUViewport *viewport);
+
 /* Texture pool */
 GPUTexture *GPU_viewport_texture_pool_query(GPUViewport *viewport, void *engine, int width, int height, int channels, int format);
 

source/blender/gpu/intern/gpu_viewport.c

@@ -72,7 +72,9 @@ struct GPUViewport {
 	/* debug */
 	GPUTexture *debug_depth;
 	int size[2];
+
 	int samples;
+	int flag;
 
 	ListBase data;  /* ViewportEngineData wrapped in LinkData */
 	unsigned int data_hash;  /* If hash mismatch we free all ViewportEngineData in this viewport */
@@ -83,11 +85,27 @@ struct GPUViewport {
 	ListBase tex_pool;  /* ViewportTempTexture list : Temporary textures shared across draw engines */
 };
 
+enum {
+	DO_UPDATE = (1 << 0),
+};
+
 static void gpu_viewport_buffers_free(FramebufferList *fbl, int fbl_len, TextureList *txl, int txl_len);
 static void gpu_viewport_storage_free(StorageList *stl, int stl_len);
 static void gpu_viewport_passes_free(PassList *psl, int psl_len);
 static void gpu_viewport_texture_pool_free(GPUViewport *viewport);
 
+void GPU_viewport_tag_update(GPUViewport *viewport)
+{
+	viewport->flag |= DO_UPDATE;
+}
+
+bool GPU_viewport_do_update(GPUViewport *viewport)
+{
+	bool ret = (viewport->flag & DO_UPDATE);
+	viewport->flag &= ~DO_UPDATE;
+	return ret;
+}
+
 GPUViewport *GPU_viewport_create(void)
 {
 	GPUViewport *viewport = MEM_callocN(sizeof(GPUViewport), "GPUViewport");

source/blender/windowmanager/intern/wm_draw.c

@@ -58,6 +58,7 @@
 #include "GPU_draw.h"
 #include "GPU_extensions.h"
 #include "GPU_immediate.h"
+#include "GPU_viewport.h"
 
 #include "RE_engine.h"
 
@@ -136,6 +137,7 @@ static void wm_region_test_render_do_draw(const Scene *scene, ScrArea *sa, ARegi
 	if (sa->spacetype == SPACE_VIEW3D) {
 		RegionView3D *rv3d = ar->regiondata;
 		RenderEngine *engine = (rv3d) ? rv3d->render_engine : NULL;
+		GPUViewport *viewport = (rv3d) ? rv3d->viewport : NULL;
 
 		if (engine && (engine->flag & RE_ENGINE_DO_DRAW)) {
 			View3D *v3d = sa->spacedata.first;
@@ -149,6 +151,9 @@ static void wm_region_test_render_do_draw(const Scene *scene, ScrArea *sa, ARegi
 
 			engine->flag &= ~RE_ENGINE_DO_DRAW;
 		}
+		else if (viewport && GPU_viewport_do_update(viewport)) {
+			ED_region_tag_redraw(ar);
+		}
 	}
 }