bool GLWrapper::createAndCompileShader(const std::string & shaderSource, GLenum shaderType, GLuint & handle, std::ostream & shaderErrorOutput)
{
const GLchar * shaderSourcePointer = shaderSource.c_str();
handle = GLLOG(glCreateShader(shaderType));ERROR_CHECK;
GLLOG(glShaderSource(handle, 1, &shaderSourcePointer, NULL));ERROR_CHECK;
GLLOG(glCompileShader(handle));ERROR_CHECK;
GLint compileStatus(0);
GLLOG(glGetShaderiv(handle, GL_COMPILE_STATUS, &compileStatus));ERROR_CHECK;
GLint bufferSize(0);
GLLOG(glGetShaderiv(handle, GL_INFO_LOG_LENGTH, &bufferSize));ERROR_CHECK;
GLchar* infoLog = new GLchar[bufferSize+1];
GLsizei infoLogLength;
GLLOG(glGetShaderInfoLog(handle, bufferSize, &infoLogLength, infoLog));ERROR_CHECK;
infoLog[bufferSize] = '\0';
shaderErrorOutput << infoLog;
delete[] infoLog;
if (!compileStatus)
{
GLLOG(glDeleteShader(handle));ERROR_CHECK;
handle = 0;
return false;
}
else
return true;
}
bool compileShader(GLuint handle, GLenum stype, const char* src) {
int shader_len = strlen(src);
glShaderSource(handle, 1, &src, &shader_len);
glCompileShader(handle);
if (!compileStatus(handle)) {
char buff[2048];
int nwritten;
glGetShaderInfoLog(handle, 2048, &nwritten, buff);
const char* typelabel = stype == GL_VERTEX_SHADER ? "vertex" : (stype == GL_FRAGMENT_SHADER ? "fragment" : "unknown");
printf("Error in %s shader\n%s\n", typelabel, buff);
return false;
}
return true;
}
