Eevee: Initial commit

Basic support for lamps. Only diffuse.

1 files changed, 103 insertions, 0 deletions

diff --git a/source/blender/draw/engines/eevee/eevee_lights.c b/source/blender/draw/engines/eevee/eevee_lights.c
new file mode 100644
index 00000000000..b3459901616
--- /dev/null
+++ b/source/blender/draw/engines/eevee/eevee_lights.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2016, Blender Foundation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contributor(s): Blender Institute
+ *
+ */
+
+/** \file eevee_lights.c
+ *  \ingroup DNA
+ */
+
+#include "DRW_render.h"
+
+#include "eevee_private.h"
+
+#define MAX_LIGHT 210 /* TODO : find size by dividing UBO max size by light data size */
+
+typedef struct EEVEE_Light {
+	float position[3], pad;
+	float color[3], spec;
+	float spot_size, spot_blend, area_x, area_y;
+} EEVEE_Light;
+
+static struct {
+	ListBase lamps; /* Lamps gathered during cache iteration */
+} g_data = {NULL}; /* Transient data */
+
+void EEVEE_lights_init(EEVEE_StorageList *stl)
+{
+	stl->lights_info = MEM_callocN(sizeof(EEVEE_LightsInfo), "EEVEE_LightsInfo");
+	stl->lights_data = MEM_mallocN(sizeof(EEVEE_Light) * MAX_LIGHT, "EEVEE_LightsUboStorage");
+	stl->lights_ref  = MEM_mallocN(sizeof(Object *) * MAX_LIGHT, "EEVEE lights_ref");
+	stl->lights_ubo  = DRW_uniformbuffer_create(sizeof(EEVEE_Light) * MAX_LIGHT, NULL);
+}
+
+void EEVEE_lights_cache_init(EEVEE_StorageList *stl)
+{
+	BLI_listbase_clear(&g_data.lamps);
+	stl->lights_info->light_count = 0;
+}
+
+void EEVEE_lights_cache_add(EEVEE_StorageList *stl, Object *ob)
+{
+	BLI_addtail(&g_data.lamps, BLI_genericNodeN(ob));
+	stl->lights_info->light_count += 1;
+}
+
+void EEVEE_lights_cache_finish(EEVEE_StorageList *stl)
+{
+	int light_ct = stl->lights_info->light_count;
+
+	if (light_ct > MAX_LIGHT) {
+		printf("Too much lamps in the scene !!!\n");
+		stl->lights_info->light_count = MAX_LIGHT;
+	}
+
+	if (light_ct > 0) {
+		int i = 0;
+		for (LinkData *link = g_data.lamps.first; link && i < MAX_LIGHT; link = link->next, i++) {
+			Object *ob = (Object *)link->data;
+			stl->lights_ref[i] = ob;
+		}
+	}
+	BLI_freelistN(&g_data.lamps);
+
+	/* We changed light data so we need to upload it */
+	EEVEE_lights_update(stl);
+}
+
+void EEVEE_lights_update(EEVEE_StorageList *stl)
+{
+	int light_ct = stl->lights_info->light_count;
+
+	/* TODO only update if data changes */
+	/* Update buffer with lamp data */
+	for (int i = 0; i < light_ct; ++i) {
+		EEVEE_Light *evli = stl->lights_data + i;
+		Object *ob = stl->lights_ref[i];
+		Lamp *la = (Lamp *)ob->data;
+
+		copy_v3_v3(evli->position, ob->obmat[3]);
+		evli->color[0] = la->r * la->energy;
+		evli->color[1] = la->g * la->energy;
+		evli->color[2] = la->b * la->energy;
+	}
+
+	/* Upload buffer to GPU */
+	DRW_uniformbuffer_update(stl->lights_ubo, stl->lights_data);
+}