//
// defaultShader constructor
//
// This constructor actually compiles and links the GLSL shader,
// so it must be called with a current context active.
////////////////////////////////////////////////////////////////////////////////
defaultShader::defaultShader() : m_program(0), m_fShader(0), m_vShader(0) {
if (glShadingLanguageSupport) {
m_program = glCreateProgramObject();
m_vShader = glCreateShaderObject( GL_VERTEX_SHADER);
m_fShader = glCreateShaderObject( GL_FRAGMENT_SHADER);
glAttachObject( m_program, m_vShader);
glAttachObject( m_program, m_fShader);
const char *temp = vShader;
glShaderSource( m_vShader, 1, &temp, NULL);
temp = fShader;
glShaderSource( m_fShader, 1, &temp, NULL);
GLint success;
glCompileShader( m_vShader);
glGetObjectParameteriv( m_vShader, GL_COMPILE_STATUS, &success);
if (! success) {
//figure out why we didn't compile
char log[256];
//printf("Failed to compile vertex shader\n");
glGetInfoLog( m_vShader, 256, NULL, log);
//printf(" Infolog: %s\n", log);
}
glCompileShader( m_fShader);
glGetObjectParameteriv( m_fShader, GL_COMPILE_STATUS, &success);
if (! success) {
//figure out why we didn't compile
char log[256];
//printf("Failed to compile fragment shader\n");
glGetInfoLog( m_fShader, 256, NULL, log);
//printf(" Infolog: %s\n", log);
}
glLinkProgram( m_program);
glGetObjectParameteriv( m_program, GL_LINK_STATUS, &success);
if (! success) {
//figure out why we didn't link
char log[256];
//printf("Failed to link\n");
glGetInfoLog( m_program, 256, NULL, log);
//printf(" Infolog: %s\n", log);
}
}
}
void printLog(GLuint handle, bool is_program)
{
//Why write two log printing functions when you can use FUNCTION POINTERS AND TERNARY OPERATORS >:D
GLboolean (*glIs)(GLuint) = is_program? glIsProgram : glIsShader;
void (*glGetiv)(GLuint, GLenum, GLint *) = is_program? glGetProgramiv : glGetShaderiv;
void (*glGetInfoLog)(GLuint, GLsizei, GLsizei *, GLchar *) = is_program? glGetProgramInfoLog : glGetShaderInfoLog;
if (glIs(handle)) {
int log_length = 0;
int max_length = log_length;
glGetiv(handle, GL_INFO_LOG_LENGTH, &max_length);
char *info_log = (char *)malloc(max_length);
glGetInfoLog(handle, max_length, &log_length, info_log);
if (log_length > 0) {
printf("%s\n", info_log);
}
free(info_log);
} else {
printf("Name %d is not a %s.\n", handle, is_program?"program":"shader");
}
}
