Function createProgram

hello-gl2/app/src/main/cpp/gl_code.cpp:80–116

}

GLuint createProgram(const char* pVertexSource, const char* pFragmentSource) {
  GLuint vertexShader = loadShader(GL_VERTEX_SHADER, pVertexSource);
  if (!vertexShader) {
    return 0;
  }

  GLuint pixelShader = loadShader(GL_FRAGMENT_SHADER, pFragmentSource);
  if (!pixelShader) {
    return 0;
  }

  GLuint program = glCreateProgram();
  if (program) {
    glAttachShader(program, vertexShader);
    checkGlError("glAttachShader");
    glAttachShader(program, pixelShader);
    checkGlError("glAttachShader");
    glLinkProgram(program);
    GLint linkStatus = GL_FALSE;
    glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
    if (linkStatus != GL_TRUE) {
      GLint bufLength = 0;
      glGetProgramiv(program, GL_INFO_LOG_LENGTH, &bufLength);
      if (bufLength) {
        char* buf = (char*)malloc(bufLength);
        if (buf) {
          glGetProgramInfoLog(program, bufLength, NULL, buf);
          LOGE("Could not link program:\n%s\n", buf);
          free(buf);
        }
      }
      glDeleteProgram(program);
      program = 0;
    }
  }
  return program;
}

GLuint gProgram;
GLuint gvPositionHandle;