//Includes and Define's:
#include "main.h"

//Globals:
extern BOOL				g_bKeys[256];
extern HDC				g_hdc;
UINT					g_uTexture;
FLOAT					g_fRotation = 0.0f;
FLOAT					g_fAlpha = 1.0f;
UINT					g_uFont;

//Functions:
void Initialize(){
	HFONT font, oldfont;

	//Set OpenGL options
	glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
	glClearDepth(1.0f);
	glDepthFunc(GL_LEQUAL);
	glEnable(GL_DEPTH_TEST);
	glEnable(GL_TEXTURE_2D);
	glEnable(GL_BLEND);
	glShadeModel(GL_SMOOTH);
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);

	//Load texture
	#ifdef _DEBUG
		g_uTexture = LoadTextureRAW("C:\\Documents and Settings\\cesar\\Mijn documenten\\Visual Studio 2005\\Projects\\OpenGL Template\\release\\texture.raw", 256, 256);
	#else
		g_uTexture = LoadTextureRAW("texture.raw", 256, 256);
	#endif

	//Load a font
	g_uFont = glGenLists(96);
	font = CreateFont(-12, 0, 0, 0, FW_DONTCARE, FALSE, FALSE, FALSE, ANSI_CHARSET, OUT_TT_PRECIS, CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY, FF_DONTCARE|DEFAULT_PITCH, "Arial");
	oldfont = (HFONT)SelectObject(g_hdc, font);
	wglUseFontBitmaps(g_hdc, 32, 96, g_uFont);
	SelectObject(g_hdc, oldfont);
	DeleteObject(font);

	//Create a timer
	timer_Set(1, 30, &RotateQuadOfDoom);

	trace("Initialized");
}
void Deinitialize(){
	//Delete font
	glDeleteLists(g_uFont, 96);

	//Delete texture
	glDeleteTextures(1, &g_uTexture);

	trace("Deinitialized");
}
void Render(){
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	//text!
	glLoadIdentity();
	glTranslatef(0.0f,0.0f,-1.0f);
	glColor3f(0.0f, 1.0f, 0.0f); //when i change it to anything other than 0.0f, 1.0f, 0.0f, it shows black text
	glRasterPos2f(0.2f, 0.0f);
	DisplayText(10, 10, g_uFont, "Hello World! %.f degrees!", g_fRotation);

	glLoadIdentity();
	glTranslatef(0.0f, 0.0f, -4.0f);
	glRotatef(g_fRotation, 0.0f, 1.0f, 0.0f);

	//Blend!
	glColor4f(1.0f, 1.0f, 1.0f, g_fAlpha);
	glBlendFunc(GL_SRC_ALPHA,GL_ONE);

	//Quad with texture:
	glBindTexture(GL_TEXTURE_2D, g_uTexture);
	glBegin(GL_QUADS);
	if(g_fRotation <= 90 || g_fRotation >= 270){
		glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 0.0f);
		glTexCoord2f(1.0f, 0.0f); glVertex3f(1.0f, -1.0f, 0.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f(1.0f, 1.0f, 0.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 0.0f);
	}else{
		glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 0.0f);
		glTexCoord2f(0.0f, 0.0f); glVertex3f(1.0f, -1.0f, 0.0f);
		glTexCoord2f(0.0f, 1.0f); glVertex3f(1.0f, 1.0f, 0.0f);
		glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 0.0f);
	}
	glEnd();
}

void KeyDown(UINT key){
	
}

void KeyUp(UINT key){
	switch(key){
		case VK_ESCAPE:
			PostQuitMessage(0);
		break;
		case 'T':
			if(glIsEnabled(GL_TEXTURE_2D)){
				glDisable(GL_TEXTURE_2D);
				trace("Disabled textures");
			}else{
				glEnable(GL_TEXTURE_2D);
				trace("Enabled textures");
			}
		break;
		case 222:
			trace("console!");
		break;
		case VK_UP:
			g_fAlpha += 0.05f;
			if(g_fAlpha > 1.0f){
				g_fAlpha = 1.0f;
			}
			trace("Set alpha: %d%", (INT)(g_fAlpha*101));
		break;
		case VK_DOWN:
			g_fAlpha -= 0.05f;
			if(g_fAlpha < 0.0f){
				g_fAlpha = 0.0f;
			}
			trace("Set alpha: %d%", (INT)(g_fAlpha*101));
		break;
	}
}

void RotateQuadOfDoom(UINT id){
	if(!g_bKeys[VK_SPACE]){
		if(g_fRotation >= 360){
			g_fRotation = 0;
		}else{
			g_fRotation += 1;
		}
	}
}
void DisplayText(INT x, INT y, UINT font, LPSTR pszFormat, ...){
	LPSTR pszText;
	va_list args;
	INT iSize;

	va_start(args, pszFormat);

	iSize = _vscprintf(pszFormat, args) + 3;
	pszText = (LPSTR)GlobalAlloc(GPTR, iSize);
	vsnprintf(pszText, iSize, pszFormat, args);
	va_end(args);

	glPushAttrib(GL_LIST_BIT);
	//glLoadIdentity();
	//glTranslated(x, y, 1);
	glListBase(font - 32);
	glCallLists(strlen(pszText), GL_UNSIGNED_BYTE, pszText);
	glPopAttrib();

	GlobalFree(pszText);
}