1 files changed, 92 insertions, 0 deletions
diff --git a/source/blender/draw/intern/draw_hair_private.h b/source/blender/draw/intern/draw_hair_private.h
new file mode 100644
index 00000000000..2e6c9a0d3c1
--- /dev/null
+++ b/source/blender/draw/intern/draw_hair_private.h
@@ -0,0 +1,92 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2017 by Blender Foundation.
+ * All rights reserved.
+ *
+ * Contributor(s): Blender Foundation, Mike Erwin, Dalai Felinto
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file draw_hair_private.h
+ *  \ingroup draw
+ */
+
+#ifndef __DRAW_HAIR_PRIVATE_H__
+#define __DRAW_HAIR_PRIVATE_H__
+
+#define MAX_LAYER_NAME_CT   3 /* u0123456789, u, a0123456789 */
+#define MAX_LAYER_NAME_LEN  DECIMAL_DIGITS_BOUND(unsigned int) + 2
+#define MAX_THICKRES        2 /* see eHairType */
+#define MAX_HAIR_SUBDIV     4 /* see hair_subdiv rna */
+
+struct Object;
+struct ParticleSystem;
+struct ModifierData;
+struct ParticleHairCache;
+
+typedef struct ParticleHairFinalCache {
+	/* Output of the subdivision stage: vertex buff sized to subdiv level. */
+	Gwn_VertBuf *proc_buf;
+	GPUTexture *proc_tex;
+
+	 /* Just contains a huge index buffer used to draw the final hair. */
+	Gwn_Batch *proc_hairs[MAX_THICKRES];
+
+	int strands_res; /* points per hair, at least 2 */
+} ParticleHairFinalCache;
+
+typedef struct ParticleHairCache {
+	Gwn_VertBuf *pos;
+	Gwn_IndexBuf *indices;
+	Gwn_Batch *hairs;
+
+	/* Hair Procedural display: Interpolation is done on the GPU. */
+	Gwn_VertBuf *proc_point_buf; /* Input control points */
+	GPUTexture *point_tex;
+
+	Gwn_VertBuf *proc_strand_buf; /* Infos of control points strands (segment count and base index) */
+	GPUTexture *strand_tex;
+
+	Gwn_VertBuf *proc_uv_buf[MAX_MTFACE];
+	GPUTexture *uv_tex[MAX_MTFACE];
+	char uv_layer_names[MAX_MTFACE][MAX_LAYER_NAME_CT][MAX_LAYER_NAME_LEN];
+
+	Gwn_VertBuf *proc_col_buf[MAX_MCOL];
+	GPUTexture *col_tex[MAX_MCOL];
+	char col_layer_names[MAX_MCOL][MAX_LAYER_NAME_CT][MAX_LAYER_NAME_LEN];
+
+	int num_uv_layers;
+	int num_col_layers;
+
+	ParticleHairFinalCache final[MAX_HAIR_SUBDIV];
+
+	int strands_count;
+	int elems_count;
+	int point_count;
+} ParticleHairCache;
+
+bool particles_ensure_procedural_data(
+        struct Object *object,
+        struct ParticleSystem *psys,
+        struct ModifierData *md,
+        struct ParticleHairCache **r_hair_cache,
+        int subdiv,
+        int thickness_res);
+
+#endif /* __DRAW_HAIR_PRIVATE_H__ */