Merge pull request #288 from openscad/issue11_2

Issue11 2

1 files changed, 89 insertions, 0 deletions

diff --git a/src/system-gl.cc b/src/system-gl.cc
new file mode 100644
index 0000000..0c436e5
--- /dev/null
+++ b/src/system-gl.cc
@@ -0,0 +1,89 @@
+
+/* OpenGL helper functions */
+
+#include <algorithm>
+#include <iostream>
+#include <vector>
+#include <sstream>
+#include <string>
+#include "system-gl.h"
+#include <boost/algorithm/string.hpp>
+#include <boost/format.hpp>
+
+using namespace std;
+using namespace boost;
+
+double gl_version()
+{
+	string tmp((const char*)glGetString( GL_VERSION ));
+	vector<string> strs;
+	split(strs, tmp, is_any_of("."));
+	stringstream out;
+	if ( strs.size() >= 2)
+		out << strs[0] << "." << strs[1];
+	else
+		out << "0.0";
+	double d;
+	out >> d;
+	return d;
+}
+
+string glew_extensions_dump()
+{
+	std::string tmp;
+	if ( gl_version() >= 3.0 ) {
+    GLint numexts = 0;
+    glGetIntegerv(GL_NUM_EXTENSIONS, &numexts);
+    for ( int i=0;i<numexts;i++ ) {
+			tmp += (const char *) glGetStringi(GL_EXTENSIONS, i);
+			tmp += " ";
+		}
+	} else {
+ 	 tmp = (const char *) glGetString(GL_EXTENSIONS);
+	}
+	vector<string> extensions;
+	split( extensions, tmp, is_any_of(" "));
+	sort( extensions.begin(), extensions.end() );
+	stringstream out;
+	out << "GL Extensions:";
+	for ( int i=0;i<extensions.size();i++ )	out << extensions[i] << "\n";
+	return out.str();
+}
+
+string glew_dump()
+{
+  GLint rbits, gbits, bbits, abits, dbits, sbits;
+  glGetIntegerv(GL_RED_BITS, &rbits);
+  glGetIntegerv(GL_GREEN_BITS, &gbits);
+  glGetIntegerv(GL_BLUE_BITS, &bbits);
+  glGetIntegerv(GL_ALPHA_BITS, &abits);
+  glGetIntegerv(GL_DEPTH_BITS, &dbits);
+  glGetIntegerv(GL_STENCIL_BITS, &sbits);
+
+  stringstream out;
+  out << "GLEW version: " << glewGetString(GLEW_VERSION)
+      << "\nOpenGL Version: " << (const char *)glGetString(GL_VERSION)
+      << "\nGL Renderer: " << (const char *)glGetString(GL_RENDERER)
+      << "\nGL Vendor: " << (const char *)glGetString(GL_VENDOR)
+      << boost::format("\nRGBA(%d%d%d%d), depth(%d), stencil(%d)") %
+          rbits % gbits % bbits % abits % dbits % sbits;
+  out << "\nGL_ARB_framebuffer_object: "
+      << (glewIsSupported("GL_ARB_framebuffer_object") ? "yes" : "no")
+      << "\nGL_EXT_framebuffer_object: "
+      << (glewIsSupported("GL_EXT_framebuffer_object") ? "yes" : "no")
+      << "\nGL_EXT_packed_depth_stencil: "
+      << (glewIsSupported("GL_EXT_packed_depth_stencil") ? "yes" : "no")
+	    << "\n";
+  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;
+}
+