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/* 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 ( unsigned 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;
}
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