1 files changed, 57 insertions, 0 deletions
diff --git a/source/blender/gpu/gawain/immediate.h b/source/blender/gpu/gawain/immediate.h
new file mode 100644
index 00000000000..9a013528aa8
--- /dev/null
+++ b/source/blender/gpu/gawain/immediate.h
@@ -0,0 +1,57 @@
+
+// Gawain immediate mode work-alike
+//
+// This code is part of the Gawain library, with modifications
+// specific to integration with Blender.
+//
+// Copyright 2016 Mike Erwin
+//
+// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of
+// the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+#pragma once
+
+#include "vertex_format.h"
+
+void immInit(void);
+void immDestroy(void);
+
+VertexFormat* immVertexFormat(void); // returns a cleared vertex format, ready for add_attrib
+
+void immBindProgram(GLuint program);
+void immUnbindProgram(void);
+
+void immBegin(GLenum primitive, unsigned vertex_ct); // must supply exactly vertex_ct vertices
+void immBeginAtMost(GLenum primitive, unsigned max_vertex_ct); // can supply fewer vertices
+void immEnd(void);
+
+void immAttrib1f(unsigned attrib_id, float x);
+void immAttrib2f(unsigned attrib_id, float x, float y);
+void immAttrib3f(unsigned attrib_id, float x, float y, float z);
+void immAttrib4f(unsigned attrib_id, float x, float y, float z, float w);
+
+void immAttrib3fv(unsigned attrib_id, const float data[3]);
+void immAttrib4fv(unsigned attrib_id, const float data[4]);
+
+void immAttrib3ub(unsigned attrib_id, unsigned char r, unsigned char g, unsigned char b);
+void immAttrib4ub(unsigned attrib_id, unsigned char r, unsigned char g, unsigned char b, unsigned char a);
+
+void immAttrib3ubv(unsigned attrib_id, const unsigned char data[4]);
+void immAttrib4ubv(unsigned attrib_id, const unsigned char data[4]);
+
+void immEndVertex(void); // and move on to the next vertex
+
+// provide 2D or 3D attribute value and end the current vertex, similar to glVertex:
+void immVertex2f(unsigned attrib_id, float x, float y);
+void immVertex3f(unsigned attrib_id, float x, float y, float z);
+
+void immVertex2fv(unsigned attrib_id, const float data[2]);
+void immVertex3fv(unsigned attrib_id, const float data[3]);
+
+// provide values that don't change for the entire draw call
+void immUniform4f(const char* name, float x, float y, float z, float w);
+
+// these set "uniform vec4 color"
+// TODO: treat as sRGB?
+void immUniformColor3ubv(const unsigned char data[3]);
+void immUniformColor4ubv(const unsigned char data[4]);