void ShutdownModernGLPatch(){
if(vtx.vao_handle){
if(vtx.p_pre_gl_buffer){
glUnmapBuffer(GL_ARRAY_BUFFER);
vtx.p_buffer_loc = 0;
vtx.p_pre_gl_buffer = 0;
}
glDeleteVertexArrays(1, &vtx.vao_handle);
glDeleteBuffers(1,&vtx.vbo_handle);
glDeleteBuffers(1,&vtx.transform_ubo_handle);
glDeleteBuffers(1,&vtx.lighting_ubo_handle);
}
vtx.p_buffer_loc = 0;
DeleteShaderProgram(&texture_shader);
DeleteShaderProgram(&colour_shader);
DeleteShaderProgram(&light_map_shader);
glswShutdown();
DestroyStack();
}
void Shader::CreateAndLinkProgram()
{
DeleteShaderProgram();
_program = glCreateProgram();
if (_shaders[VERTEX_SHADER] != 0)
{
glAttachShader(_program, _shaders[VERTEX_SHADER]);
}
if (_shaders[FRAGMENT_SHADER] != 0)
{
glAttachShader(_program, _shaders[FRAGMENT_SHADER]);
}
if (_shaders[GEOMETRY_SHADER] != 0)
{
glAttachShader(_program, _shaders[GEOMETRY_SHADER]);
}
//link and check whether the program links fine
GLint status;
glLinkProgram(_program);
glGetProgramiv(_program, GL_LINK_STATUS, &status);
if (status == GL_FALSE) {
GLint infoLogLength;
glGetProgramiv(_program, GL_INFO_LOG_LENGTH, &infoLogLength);
GLchar *infoLog = new GLchar[infoLogLength];
glGetProgramInfoLog(_program, infoLogLength, NULL, infoLog);
cerr << "Link log: " << infoLog << endl;
delete[] infoLog;
}
glDeleteShader(_shaders[VERTEX_SHADER]);
glDeleteShader(_shaders[FRAGMENT_SHADER]);
glDeleteShader(_shaders[GEOMETRY_SHADER]);
}
//static variables
GLuint ab=0;
#define BUFFER_OFFSET(i) ((char *)NULL + (i))
int main ()
{
int i=0;
int ab=0;
float clr[3] = {0.0f, 0.3f, 0.6f};
float add[3] = {0.001f, 0.002f, 0.003f};
unsigned int position_attrib_idx = 0;
//GL stuff
SShader vertexShader;
SShader fragmentShader;
SShaderProgram program;
CPlatform platform;
Create(&platform, "", 2, 1, 1024, 768, 8, 8, 8, 8, 16, 8, 0);
//-------------------
//setup the shaders
CreateShader(&vertexShader, VERT, &pVertexShader, 1);
CreateShader(&fragmentShader, FRAG, &pFragmentShader, 1);
CreateShaderProgram(&program);
AddShaderToProgram(&program, &vertexShader);
AddShaderToProgram(&program, &fragmentShader);
SetAttributeLocation(&program, position_attrib_idx, "position"); //needs to be calleb before linking
LinkShaderProgram(&program);
glGenBuffers(1, &ab); //array buffer
//fill buffers
glBindBuffer(GL_ARRAY_BUFFER, ab);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
//-------------------
//tell openGL how to interperet the data
glBindBuffer(GL_ARRAY_BUFFER, ab);
glEnableVertexAttribArray(0);
glVertexAttribPointer(position_attrib_idx, 3, GL_FLOAT, GL_FALSE, 12, 0);
//set rendering states
glEnable(GL_CULL_FACE);
glClearColor(0, 0, 0, 0.0f); //alpha to 0, should make triangle appear over console
Start(&program); //even when glDeleteProgram is called the program won't be deleted until it is out of use
while (!IS_BUTTON_PRESSED(platform.m_keyboard.key[KB_ESC]))
{
Tick(&platform);
glClear(GL_COLOR_BUFFER_BIT);
SetVec3ByName(&program, "uColour", clr);
glDrawArrays( GL_TRIANGLES, 0, 3);
SwapBuffers(&platform);
for(i=0;i<3;i++)
{
clr[i]+=add[i];
if(clr[i]>1.0f)add[i]*=-1.0f;
if(clr[i]<0.0f)add[i]*=-1.0f;
}
}
Stop();
Shader::~Shader(void)
{
DeleteShaderProgram();
_attributeList.clear();
_uniformLocationList.clear();
}
