add system-gl.cc

1 files changed, 50 insertions, 0 deletions

diff --git a/src/system-gl.cc b/src/system-gl.cc
new file mode 100644
index 0000000..2e3f3bc
--- /dev/null
+++ b/src/system-gl.cc
@@ -0,0 +1,50 @@
+
+/* OpenGL helper functions */
+
+#include <iostream>
+#include <sstream>
+#include <string>
+#include "system-gl.h"
+#include <boost/algorithm/string.hpp>
+
+using namespace std;
+using namespace boost;
+
+string glew_dump(bool dumpall)
+{
+  stringstream out;
+  out << "GLEW version: " << glewGetString(GLEW_VERSION) << endl
+       << "GL Renderer: " << (const char *)glGetString(GL_RENDERER) << endl
+       << "GL Vendor: " << (const char *)glGetString(GL_VENDOR) << endl
+       << "OpenGL Version: " << (const char *)glGetString(GL_VERSION) << endl;
+
+  out << "GL Extensions: " << endl;
+  if (dumpall) {
+    string extensions((const char *)glGetString(GL_EXTENSIONS));
+    replace_all( extensions, " ", "\n " );
+    out << " " << extensions << endl;
+  }
+
+  out << "GL_ARB_framebuffer_object: "
+      << (glewIsSupported("GL_ARB_framebuffer_object") ? "yes" : "no")
+      << endl
+      << "GL_EXT_framebuffer_object: "
+      << (glewIsSupported("GL_EXT_framebuffer_object") ? "yes" : "no")
+      << endl
+      << "GL_EXT_packed_depth_stencil: "
+      << (glewIsSupported("GL_EXT_packed_depth_stencil") ? "yes" : "no")
+      << endl;
+
+  return out.str();
+};
+
+bool report_glerror(const char * function)
+{
+  GLenum tGLErr = glGetError();
+  if (tGLErr != GL_NO_ERROR) {
+    cerr << "OpenGL error 0x" << hex << tGLErr << ": " << gluErrorString(tGLErr) << " after " << function << endl;
+    return true;
+  }
+  return false;
+}
+