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diff --git a/source/blender/gpu/GPU_shader_interface.h b/source/blender/gpu/GPU_shader_interface.h
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+/*
+ * ***** 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) 2016 by Mike Erwin.
+ * All rights reserved.
+ *
+ * Contributor(s): Blender Foundation
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/gpu/GPU_shader_interface.h
+ *  \ingroup gpu
+ *
+ * GPU shader interface (C --> GLSL)
+ */
+
+#ifndef __GPU_SHADER_INTERFACE_H__
+#define __GPU_SHADER_INTERFACE_H__
+
+#include "GPU_common.h"
+
+typedef enum {
+	GPU_UNIFORM_NONE = 0, /* uninitialized/unknown */
+
+	GPU_UNIFORM_MODEL,      /* mat4 ModelMatrix */
+	GPU_UNIFORM_VIEW,       /* mat4 ViewMatrix */
+	GPU_UNIFORM_MODELVIEW,  /* mat4 ModelViewMatrix */
+	GPU_UNIFORM_PROJECTION, /* mat4 ProjectionMatrix */
+	GPU_UNIFORM_VIEWPROJECTION, /* mat4 ViewProjectionMatrix */
+	GPU_UNIFORM_MVP,        /* mat4 ModelViewProjectionMatrix */
+
+	GPU_UNIFORM_MODEL_INV,           /* mat4 ModelMatrixInverse */
+	GPU_UNIFORM_VIEW_INV,            /* mat4 ViewMatrixInverse */
+	GPU_UNIFORM_MODELVIEW_INV,       /* mat4 ModelViewMatrixInverse */
+	GPU_UNIFORM_PROJECTION_INV,      /* mat4 ProjectionMatrixInverse */
+	GPU_UNIFORM_VIEWPROJECTION_INV,  /* mat4 ViewProjectionMatrixInverse */
+
+	GPU_UNIFORM_NORMAL,      /* mat3 NormalMatrix */
+	GPU_UNIFORM_WORLDNORMAL, /* mat3 WorldNormalMatrix */
+	GPU_UNIFORM_CAMERATEXCO, /* vec4 CameraTexCoFactors */
+	GPU_UNIFORM_ORCO,        /* vec3 OrcoTexCoFactors[] */
+
+	GPU_UNIFORM_COLOR, /* vec4 color */
+	GPU_UNIFORM_EYE, /* vec3 eye */
+	GPU_UNIFORM_CALLID, /* int callId */
+
+	GPU_UNIFORM_CUSTOM, /* custom uniform, not one of the above built-ins */
+
+	GPU_NUM_UNIFORMS, /* Special value, denotes number of builtin uniforms. */
+} GPUUniformBuiltin;
+
+typedef struct GPUShaderInput {
+	struct GPUShaderInput *next;
+	uint32_t name_offset;
+	uint name_hash;
+	GPUUniformBuiltin builtin_type; /* only for uniform inputs */
+	uint32_t gl_type; /* only for attrib inputs */
+	int32_t size; /* only for attrib inputs */
+	int32_t location;
+} GPUShaderInput;
+
+#define GPU_NUM_SHADERINTERFACE_BUCKETS 257
+#define GPU_SHADERINTERFACE_REF_ALLOC_COUNT 16
+
+typedef struct GPUShaderInterface {
+	int32_t program;
+	uint32_t name_buffer_offset;
+	GPUShaderInput *attrib_buckets[GPU_NUM_SHADERINTERFACE_BUCKETS];
+	GPUShaderInput *uniform_buckets[GPU_NUM_SHADERINTERFACE_BUCKETS];
+	GPUShaderInput *ubo_buckets[GPU_NUM_SHADERINTERFACE_BUCKETS];
+	GPUShaderInput *builtin_uniforms[GPU_NUM_UNIFORMS];
+	char *name_buffer;
+	struct GPUBatch **batches; /* references to batches using this interface */
+	uint batches_len;
+} GPUShaderInterface;
+
+GPUShaderInterface *GPU_shaderinterface_create(int32_t program_id);
+void GPU_shaderinterface_discard(GPUShaderInterface *);
+
+const GPUShaderInput *GPU_shaderinterface_uniform(const GPUShaderInterface *, const char *name);
+const GPUShaderInput *GPU_shaderinterface_uniform_builtin(const GPUShaderInterface *, GPUUniformBuiltin);
+const GPUShaderInput *GPU_shaderinterface_ubo(const GPUShaderInterface *, const char *name);
+const GPUShaderInput *GPU_shaderinterface_attr(const GPUShaderInterface *, const char *name);
+
+/* keep track of batches using this interface */
+void GPU_shaderinterface_add_batch_ref(GPUShaderInterface *, struct GPUBatch *);
+void GPU_shaderinterface_remove_batch_ref(GPUShaderInterface *, struct GPUBatch *);
+
+#endif /* __GPU_SHADER_INTERFACE_H__ */