GLDebug.h

Go to the documentation of this file.

#pragma once
 
#include <iostream>
#include <exception>


class GLException : public std::exception {
public:
  GLException(const std::string& whatStr) : whatStr(whatStr) {}
  virtual const char* what() const throw() {
    return whatStr.c_str();
  }
private:
  std::string whatStr; 
};

struct Dimensions {
  uint32_t width;  
  uint32_t height; 

  float aspect() const {return float(width)/float(height);}
};

std::string errorString(GLenum glerr);
 
#ifndef NDEBUG


#define MAX_GL_ERROR_COUNT 10

void errorOut(const std::string& statement, const std::string& location,
              uint32_t line, const std::string& file, uint32_t errnum);

# define GL(stmt)                                                      \
do {                                                                 \
GLenum glerr;                                                      \
uint32_t counter = 0;                                              \
while((glerr = glGetError()) != GL_NO_ERROR) {                     \
errorOut(#stmt, "before", __LINE__, __FILE__,                    \
static_cast<uint32_t>(glerr));                           \
counter++;                                                       \
if (counter > MAX_GL_ERROR_COUNT) break;                         \
}                                                                  \
stmt;                                                              \
counter = 0;                                                       \
while((glerr = glGetError()) != GL_NO_ERROR) {                     \
errorOut(#stmt, "in", __LINE__, __FILE__,                        \
static_cast<uint32_t>(glerr));                           \
counter++;                                                       \
if (counter > MAX_GL_ERROR_COUNT) break;                         \
}                                                                  \
} while(0)

#else
# define GL(stmt) do { stmt; } while(0)
#endif

void checkAndThrow();

void checkAndThrowShader(GLuint shader);

void checkAndThrowProgram(GLuint program);