1 files changed, 48 insertions, 0 deletions
diff --git a/tests/system-gl.cc b/tests/system-gl.cc
new file mode 100644
index 0000000..b7c7dd6
--- /dev/null
+++ b/tests/system-gl.cc
@@ -0,0 +1,48 @@
+
+/* OpenGL helper functions */
+
+#include <iostream>
+#include "system-gl.h"
+#include <boost/algorithm/string.hpp>
+
+using namespace std;
+using namespace boost;
+
+void glew_dump() {
+  cerr << "GLEW version: " << glewGetString(GLEW_VERSION) << endl
+       << "Renderer: " << (const char *)glGetString(GL_RENDERER) << endl
+       << "Vendor: " << (const char *)glGetString(GL_VENDOR) << endl
+       << "OpenGL version: " << (const char *)glGetString(GL_VERSION) << endl;
+
+  string extensions((const char *)glGetString(GL_EXTENSIONS));
+  replace_all( extensions, " ", "\n " );
+  cerr << "Extensions: " << endl << " " << extensions << endl
+       << "Framebuffer and Stencil support:" << endl
+       << " GLEW_ARB_framebuffer_object: " << (bool)GLEW_ARB_framebuffer_object << endl
+       << " GLEW_EXT_framebuffer_object: " << (bool)GLEW_EXT_framebuffer_object << endl
+       << " GLEW_EXT_packed_depth_stencil: " << (bool)GLEW_EXT_packed_depth_stencil << endl
+       << " glewIsSupported(\"GL_ARB_framebuffer_object\"): " << (bool)glewIsSupported("GL_ARB_framebuffer_object") << endl
+       << " glewIsSupported(\"GL_EXT_framebuffer_object\"): " << (bool)glewIsSupported("GL_EXT_framebuffer_object") << endl
+       << " glewIsSupported(\"GL_EXT_packed_depth_stencil\"): " << (bool)glewIsSupported("GL_EXT_packed_depth_stencil") << endl;
+};
+
+const char * gl_errors[] = {
+  "GL_INVALID_ENUM", // 0x0500
+  "GL_INVALID_VALUE", // 0x0501
+  "GL_INVALID_OPERATION", // 0x0502
+  "GL_OUT_OF_MEMORY" // 0x0503
+};
+
+bool report_glerror(const char * task)
+{
+  GLenum tGLErr = glGetError();
+  if (tGLErr != GL_NO_ERROR) {
+    if ( (tGLErr-0x500)<=3 && (tGLErr-0x500)>=0 )
+      cerr << "OpenGL error " << gl_errors[tGLErr-0x500] << " while " << task << endl;
+    else
+      cerr << "OpenGL error " << hex << tGLErr << " while " << task << endl;
+    return true;
+  }
+  return false;
+}
+