autodetect hardware generated mipmap support

1 files changed, 30 insertions, 3 deletions

diff --git a/src/render/state.cc b/src/render/state.cc
index 649493e..cc402ff 100644
--- a/src/render/state.cc
+++ b/src/render/state.cc
@@ -4,19 +4,46 @@
    the terms of the GNU General Public License version 2 
 */
 
+#include <string>
+#include <sstream>
+
 #include "render/state.h"
 #include "render/gl.h"
 #include "render/render.h"
 
 namespace render {
 
-int	State::render_width;
-int 	State::render_height;
-float	State::render_aspect;
+int	State::render_width = 0;
+int 	State::render_height = 0;
+float	State::render_aspect = 0;
+bool	State::render_has_generate_mipmaps = 0;
 
 void State::init(int width, int height)
 {
 	resize(width, height);
+
+	render_has_generate_mipmaps = false;
+	
+	std::string version(gl::version());
+	for (size_t i =0; i < version.size(); i++) {
+		if (version[i] == '.')
+			version[i] = ' ';
+	}
+
+	std::stringstream versionstream(version);
+	int major, minor;
+	if (versionstream >> major >> minor) {
+
+		if (major > 1) {
+			render_has_generate_mipmaps = true;
+		} else if (major == 1) {
+			if (minor >3)
+				render_has_generate_mipmaps = true;
+		}
+
+	} else {
+		con_warn << "Could not determine OpenGL version!" << std::endl;
+	}
 }
 
 void State::shutdown()