#pragma once

#pragma data_seg(".glCreateProgram")
static const char* glCreateProgram = "glCreateProgram";

#pragma data_seg(".glCreateShader")
static const char* glCreateShader = "glCreateShader";

#pragma data_seg(".glShaderSource")
static const char* glShaderSource = "glShaderSource";

#pragma data_seg(".glCompileShader")
static const char* glCompileShader = "glCompileShader";

#pragma data_seg(".glAttachShader")
static const char* glAttachShader = "glAttachShader";

#pragma data_seg(".glLinkProgram")
static const char* glLinkProgram = "glLinkProgram";

#pragma data_seg(".glUseProgram")
static const char* glUseProgram = "glUseProgram";

#pragma data_seg(".glActiveTexture")
static const char* glActiveTexture = "glActiveTexture";

#pragma code_seg(".UseShader")
inline void UseShader(GLuint shader)
{
	_asm
	{
		mov		eax, shader
		push	shaders[eax*4]
		push	dword ptr [glUseProgram]

		call	dword ptr [wglGetProcAddress]
		call    eax
	}
}

#pragma code_seg(".CreateShader")
inline void CreateShaders()
{
		_asm
		{
			xor			esi, esi

shaderloop:
			push        8B30h 
			push        dword ptr [glCreateShader]   
			push        8B31h 
			push        dword ptr [glCreateShader]   
			push        dword ptr [glCreateProgram] 

			call        dword ptr [wglGetProcAddress] 
			call        eax  
			mov         ebx,eax 

			call        dword ptr [wglGetProcAddress] 
			call        eax  
			mov         edi,eax 

			call        dword ptr [wglGetProcAddress] 
			call        eax  
			mov         edx,eax  
			lea         eax, fsh[esi*4] 

			push        ebx   
			push        dword ptr [glLinkProgram] 

			push        edx
			push        ebx  
			push        dword ptr [glAttachShader]  

			push        edx  
			push        dword ptr [glCompileShader] 

			push        0    
			push        eax  
			push        1    
			push        edx 
			push        dword ptr [glShaderSource]  

			push        edi
			push        ebx  
			push        dword ptr [glAttachShader]  

			push        edi  
			push        dword ptr [glCompileShader] 

			push        0    
			push        offset vertexShader
			push        1    
			push        edi 
			push        dword ptr [glShaderSource]  

			mov			edi, dword ptr [wglGetProcAddress]
			call        edi
			call        eax  
			call        edi
			call        eax 
			call        edi
			call        eax  
			call        edi
			call        eax  
			call        edi
			call        eax  
			call        edi
			call        eax 
			call        edi
			call        eax  

			mov         dword ptr shaders[esi*4], ebx
			inc			esi
			test		esi, shaderCount
			jz			shaderLoop
	}
}

#pragma code_seg(".CreateOGL")
inline void CreateOGL()
{
	_asm
	{
		push	hdc
		push	offset pfd
		push	offset pfd
		push	hdc
		call	dword ptr [ChoosePixelFormat]
		push	eax
		push	hdc
		call	dword ptr [SetPixelFormat]
		call	dword ptr [wglCreateContext]
		push	eax
		push	hdc
		call	dword ptr [wglMakeCurrent]
	}
}

#pragma code_seg(".DrawFrame")
void DrawFrame()
{	
	glLoadIdentity();
	glTranslated(1, 1, x_Sin(time)*3);
	glRotatef(-time * 10, 0, 1, 0);
	UseShader(WORLD_GLSL);
	glNormal3f(WIDTH, HEIGHT, ASPECT);
	glColor3f(time, 0, 0);
	glRects(-1, -1, 1, 1);

	SwapBuffers(hdc);
}