Merge of first part of changes from the apricot branch, especially

the features that are needed to run the game. Compile tested with
scons, make, but not cmake, that seems to have an issue not related
to these changes. The changes include:

* GLSL support in the viewport and game engine, enable in the game
  menu in textured draw mode.
* Synced and merged part of the duplicated blender and gameengine/
  gameplayer drawing code.
* Further refactoring of game engine drawing code, especially mesh
  storage changed a lot.
* Optimizations in game engine armatures to avoid recomputations.
* A python function to get the framerate estimate in game.

* An option take object color into account in materials.
* An option to restrict shadow casters to a lamp's layers.
* Increase from 10 to 18 texture slots for materials, lamps, word.
  An extra texture slot shows up once the last slot is used.

* Memory limit for undo, not enabled by default yet because it
  needs the .B.blend to be changed.
* Multiple undo for image painting.

* An offset for dupligroups, so not all objects in a group have to
  be at the origin.

1 files changed, 144 insertions, 0 deletions

diff --git a/source/blender/gpu/GPU_extensions.h b/source/blender/gpu/GPU_extensions.h
new file mode 100644
index 00000000000..d3faa81ebb1
--- /dev/null
+++ b/source/blender/gpu/GPU_extensions.h
@@ -0,0 +1,144 @@
+/**
+ * $Id$
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This shader 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. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * This shader 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 shader; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2005 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): Brecht Van Lommel.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef GPU_EXTENSIONS_H
+#define GPU_EXTENSIONS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* GPU extensions support */
+
+struct Image;
+struct ImageUser;
+
+struct GPUTexture;
+typedef struct GPUTexture GPUTexture;
+
+struct GPUFrameBuffer;
+typedef struct GPUFrameBuffer GPUFrameBuffer;
+
+struct GPUShader;
+typedef struct GPUShader GPUShader;
+
+void GPU_extensions_init(void); /* call this before running any of the functions below */
+void GPU_extensions_exit(void);
+int GPU_extensions_minimum_support(void);
+int GPU_print_error(char *str);
+
+/* GPU Texture
+   - always returns unsigned char RGBA textures
+   - if texture with non square dimensions is created, depending on the
+     graphics card capabilities the texture may actually be stored in a
+	 larger texture with power of two dimensions. the actual dimensions
+	 may be querd with GPU_texture_opengl_width/height. GPU_texture_coord_2f
+	 calls glTexCoord2f with the coordinates adjust for this.
+   - can use reference counting:
+       - reference counter after GPU_texture_create is 1
+       - GPU_texture_ref increases by one
+       - GPU_texture_free decreases by one, and frees if 0
+	- if created with from_blender, will not free the texture
+*/
+
+GPUTexture *GPU_texture_create_1D(int w, float *pixels);
+GPUTexture *GPU_texture_create_2D(int w, int h, float *pixels);
+GPUTexture *GPU_texture_create_depth(int w, int h);
+GPUTexture *GPU_texture_from_blender(struct Image *ima,
+	struct ImageUser *iuser, double time);
+void GPU_texture_free(GPUTexture *tex);
+
+void GPU_texture_ref(GPUTexture *tex);
+
+void GPU_texture_bind(GPUTexture *tex, int number);
+void GPU_texture_unbind(GPUTexture *tex);
+
+GPUFrameBuffer *GPU_texture_framebuffer(GPUTexture *tex);
+
+int GPU_texture_target(GPUTexture *tex);
+int GPU_texture_opengl_width(GPUTexture *tex);
+int GPU_texture_opengl_height(GPUTexture *tex);
+
+/* GPU Framebuffer
+   - this is a wrapper for an OpenGL framebuffer object (FBO). in practice
+     multiple FBO's may be created, to get around limitations on the number
+	 of attached textures and the dimension requirements.
+   - after any of the GPU_framebuffer_* functions, GPU_framebuffer_restore must
+     be called before rendering to the window framebuffer again */
+
+GPUFrameBuffer *GPU_framebuffer_create();
+int GPU_framebuffer_texture_attach(GPUFrameBuffer *fb, GPUTexture *tex);
+void GPU_framebuffer_texture_detach(GPUFrameBuffer *fb, GPUTexture *tex);
+void GPU_framebuffer_texture_bind(GPUFrameBuffer *fb, GPUTexture *tex);
+void GPU_framebuffer_texture_unbind(GPUFrameBuffer *fb, GPUTexture *tex);
+void GPU_framebuffer_free(GPUFrameBuffer *fb);
+
+void GPU_framebuffer_restore();
+
+/* GPU Shader
+   - only for fragment shaders now
+   - must call texture bind before setting a texture as uniform! */
+
+GPUShader *GPU_shader_create(const char *vertexcode, const char *fragcode, GPUShader *lib);
+GPUShader *GPU_shader_create_lib(const char *code);
+void GPU_shader_free(GPUShader *shader);
+
+void GPU_shader_bind(GPUShader *shader);
+void GPU_shader_unbind();
+
+int GPU_shader_get_uniform(GPUShader *shader, char *name);
+void GPU_shader_uniform_vector(GPUShader *shader, int location, int length,
+	int arraysize, float *value);
+void GPU_shader_uniform_texture(GPUShader *shader, int location, GPUTexture *tex);
+
+int GPU_shader_get_attribute(GPUShader *shader, char *name);
+
+/* Vertex attributes for shaders */
+
+#define GPU_MAX_ATTRIB		32
+
+typedef struct GPUVertexAttribs {
+	struct {
+		int type;
+		int glindex;
+		char name[32];
+	} layer[GPU_MAX_ATTRIB];
+
+	int totlayer;
+} GPUVertexAttribs;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+