View3D: Tweak GLSL preview, use only lamps enabled in active render layer and material light group.

This change makes lighting in GLSL preview more accurate, though it still
doesn't support material's "Exclusive" option.

Technical note: Changes in view3d_draw.c are not essential, these avoid
preparing unused shadow buffers.

Reviewers: brecht

Reviewed By: brecht

Differential Revision: https://developer.blender.org/D457

2 files changed, 19 insertions, 1 deletions

diff --git a/source/blender/gpu/GPU_material.h b/source/blender/gpu/GPU_material.h
index bc410cb8369..1011ac80901 100644
--- a/source/blender/gpu/GPU_material.h
+++ b/source/blender/gpu/GPU_material.h
@@ -47,6 +47,7 @@ struct Image;
 struct bNode;
 struct LinkNode;
 struct Scene;
+struct SceneRenderLayer;
 struct GPUVertexAttribs;
 struct GPUNode;
 struct GPUNodeLink;
@@ -135,6 +136,7 @@ void GPU_material_free(struct Material *ma);
 
 void GPU_materials_free(void);
 
+bool GPU_lamp_override_visible(GPULamp *lamp, struct SceneRenderLayer *srl, struct Material *ma);
 void GPU_material_bind(GPUMaterial *material, int oblay, int viewlay, double time, int mipmap, float viewmat[4][4], float viewinv[4][4]);
 void GPU_material_bind_uniforms(GPUMaterial *material, float obmat[4][4], float obcol[4], float autobumpscale);
 void GPU_material_unbind(GPUMaterial *material);
diff --git a/source/blender/gpu/intern/gpu_material.c b/source/blender/gpu/intern/gpu_material.c
index 0f05a7f0cda..4b070a4568a 100644
--- a/source/blender/gpu/intern/gpu_material.c
+++ b/source/blender/gpu/intern/gpu_material.c
@@ -58,6 +58,7 @@
 #include "BKE_node.h"
 #include "BKE_scene.h"
 #include "BKE_texture.h"
+#include "BKE_group.h"
 
 #include "IMB_imbuf_types.h"
 
@@ -259,18 +260,33 @@ void GPU_material_free(Material *ma)
 	BLI_freelistN(&ma->gpumaterial);
 }
 
+bool GPU_lamp_override_visible(GPULamp *lamp, SceneRenderLayer *srl, Material *ma)
+{
+	if (srl && srl->light_override)
+		return BKE_group_object_exists(srl->light_override, lamp->ob);
+	else if (ma && ma->group)
+		return BKE_group_object_exists(ma->group, lamp->ob);
+	else
+		return true;
+}
+
 void GPU_material_bind(GPUMaterial *material, int oblay, int viewlay, double time, int mipmap, float viewmat[4][4], float viewinv[4][4])
 {
 	if (material->pass) {
 		LinkData *nlink;
 		GPULamp *lamp;
 		GPUShader *shader = GPU_pass_shader(material->pass);
+		SceneRenderLayer *srl = BLI_findlink(&material->scene->r.layers, material->scene->r.actlay);
+
+		if (srl)
+			viewlay &= srl->lay;
 
 		/* handle layer lamps */
 		for (nlink=material->lamps.first; nlink; nlink=nlink->next) {
 			lamp= nlink->data;
 
-			if (!lamp->hide && (lamp->lay & viewlay) && (!(lamp->mode & LA_LAYER) || (lamp->lay & oblay))) {
+			if (!lamp->hide && (lamp->lay & viewlay) && (!(lamp->mode & LA_LAYER) || (lamp->lay & oblay))
+			    && GPU_lamp_override_visible(lamp, srl, material->ma)) {
 				lamp->dynenergy = lamp->energy;
 				copy_v3_v3(lamp->dyncol, lamp->col);
 			}