From a704318f507f486ac04834747eb209d0a9410702 Mon Sep 17 00:00:00 2001
From: Stijn Buys <ingar@osirion.org>
Date: Sun, 24 Oct 2010 16:02:09 +0000
Subject: keepalive optimizations, r_lights engine variable, OpenGL VBO support

---
 src/render/state.cc | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 50 insertions(+), 1 deletion(-)

(limited to 'src/render/state.cc')

diff --git a/src/render/state.cc b/src/render/state.cc
index 1a345c7..df2af75 100644
--- a/src/render/state.cc
+++ b/src/render/state.cc
@@ -7,6 +7,8 @@
 #include <string>
 #include <sstream>
 
+#include "SDL/SDL.h"
+
 #include "render/state.h"
 #include "render/gl.h"
 #include "render/render.h"
@@ -17,7 +19,9 @@ namespace render
 int	State::render_width = 0;
 int 	State::render_height = 0;
 float	State::render_aspect = 0;
-bool	State::render_has_generate_mipmaps = 0;
+bool	State::render_has_generate_mipmaps = false;
+bool	State::render_has_vbo = false;
+GLuint	State::render_vbo = 0;
 
 void State::init(int width, int height)
 {
@@ -45,10 +49,55 @@ void State::init(int width, int height)
 	} else {
 		con_warn << "Could not determine OpenGL version!" << std::endl;
 	}
+	
+	con_print << "  Hardware generate mipmaps ";
+	if (render_has_generate_mipmaps)
+		con_print << "enabled" << std::endl;
+	else
+		con_print << "disabled" << std::endl;
+	
+	// initialize gl functions
+	render_has_vbo = true;
+	gl::genbuffers = (gl::genbuffers_func) SDL_GL_GetProcAddress("glGenBuffers");
+	if (!gl::genbuffers) {
+		con_debug << "  glGenBuffers not available" << std::endl;
+		render_has_vbo = false;
+	}
+	
+	gl::deletebuffers = (gl::deletebuffers_func) SDL_GL_GetProcAddress("glDeleteBuffers");
+	if (!gl::deletebuffers) {
+		con_debug << "  glDeleteBuffers not available" << std::endl;
+		render_has_vbo = false;
+	}
+
+	gl::bindbuffer = (gl::bindbuffer_func) SDL_GL_GetProcAddress("glBindBuffer");
+	if (!gl::bindbuffer) {
+		con_debug << "  glBindBuffer not available" << std::endl;
+		render_has_vbo = false;
+	}
+	
+	gl::bufferdata = (gl::bufferdata_func) SDL_GL_GetProcAddress("glBufferData");
+	if (!gl::bufferdata) {
+		con_debug << "  glBufferData not available" << std::endl;
+		render_has_vbo = false;
+	}
+
+	con_print << "  Vertex bufer objects ";
+	if (render_has_vbo)
+		con_print << "enabled" << std::endl;
+	else
+		con_print << "disabled" << std::endl;
+
+	// Generate VBO
+	if (render_has_vbo)
+		gl::genbuffers(1, &render_vbo);
 }
 
 void State::shutdown()
 {
+	// Delete VBO
+	if (render_has_vbo)
+		gl::deletebuffers(1, &render_vbo);
 }
 
 void State::resize(int width, int height)
-- 
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