shader.c

// Copyright 2017 OpenSWE1R Maintainers
// Licensed under GPLv2 or any later version
// Refer to the included LICENSE.txt file.

#include <stdlib.h>
#include <stdio.h>

#include "shader.h"

void PrintShaderLog(GLuint shader) {
  int infologLength = 0;
  int charsWritten  = 0;
  char *infoLog;

  glGetShaderiv(shader, GL_INFO_LOG_LENGTH,&infologLength);

  if (infologLength > 0) {
    infoLog = (char *)malloc(infologLength);
    glGetShaderInfoLog(shader, infologLength, &charsWritten, infoLog);
    printf("%s\n",infoLog);
    free(infoLog);
  }
  return;
}

void PrintShaderProgramLog(GLuint program) {
  int infologLength = 0;
  int charsWritten  = 0;
  char *infoLog;

  glGetProgramiv(program, GL_INFO_LOG_LENGTH,&infologLength);

  if (infologLength > 0) {
    infoLog = (char *)malloc(infologLength);
    glGetProgramInfoLog(program, infologLength, &charsWritten, infoLog);
    printf("%s\n",infoLog);
    free(infoLog);
  }

  return;
}

GLuint CreateShaderProgram(GLuint vertexShader, GLuint fragmentShader) {
  GLuint program = glCreateProgram();
  glAttachShader(program, vertexShader);
  glAttachShader(program, fragmentShader);
  return program;
}

bool LinkShaderProgram(GLuint program) {
  glLinkProgram(program);
  GLint isLinked = 0;
  glGetProgramiv(program, GL_LINK_STATUS, &isLinked);
  return isLinked != GL_FALSE;
}

GLuint CreateShader(const char* source, GLuint type) {
  GLuint shader = glCreateShader(type);
  glShaderSource(shader, 1, &source,NULL);
  glCompileShader(shader);
  return shader;
}