// r_misc.c

#include "quakedef.h"

byte *playerTranslation;

/*
==================
R_InitTextures
==================
*/
void	R_InitTextures (void)
{
	int		x,y, m;
	byte	*dest;

// create a simple checkerboard texture for the default
	r_notexture_mip = Hunk_AllocName (sizeof(texture_t) + 16*16+8*8+4*4+2*2, "notexture");
	
	r_notexture_mip->width = r_notexture_mip->height = 16;
	r_notexture_mip->offsets[0] = sizeof(texture_t);
	r_notexture_mip->offsets[1] = r_notexture_mip->offsets[0] + 16*16;
	r_notexture_mip->offsets[2] = r_notexture_mip->offsets[1] + 8*8;
	r_notexture_mip->offsets[3] = r_notexture_mip->offsets[2] + 4*4;
	
	for (m=0 ; m<4 ; m++)
	{
		dest = (byte *)r_notexture_mip + r_notexture_mip->offsets[m];
		for (y=0 ; y< (16>>m) ; y++)
			for (x=0 ; x< (16>>m) ; x++)
			{
				if (  (y< (8>>m) ) ^ (x< (8>>m) ) )
					*dest++ = 0;
				else
					*dest++ = 0xff;
			}
	}	
}

/*
byte	dottexture[8][8] =
{
	{0,1,1,0,0,0,0,0},
	{1,1,1,1,0,0,0,0},
	{1,1,1,1,0,0,0,0},
	{0,1,1,0,0,0,0,0},
	{0,0,0,0,1,0,0,0},
	{0,0,0,0,1,0,0,1},
	{0,0,0,0,0,0,1,0},
	{0,0,0,1,0,0,0,1},
};
*/

byte	dottexture[16][16] =
{
	{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//1
	{0,0,0,1,0,1,0,0,0,0,0,0,1,1,0,0},
	{0,0,0,0,1,0,0,0,0,0,0,1,1,1,1,0},
	{0,1,0,1,1,1,0,1,0,0,0,1,1,1,1,0},//4
	{0,0,1,1,1,1,1,0,0,0,0,0,1,1,0,0},
	{0,1,0,1,1,1,0,1,0,0,0,0,0,0,0,0},
	{0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0},
	{0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0},//8
	{0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0},
	{0,0,0,0,0,0,0,0,0,1,1,1,0,1,0,0},
	{0,0,0,0,0,0,0,0,1,1,0,1,1,0,1,0},
	{0,0,0,1,0,0,0,0,1,1,1,1,1,0,1,0},//12
	{0,1,1,1,0,0,0,0,1,1,0,1,1,0,1,0},
	{0,0,1,1,1,0,0,0,0,1,1,1,0,1,0,0},
	{0,0,1,0,0,0,0,0,0,0,1,1,1,0,0,0},
	{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},//16
};

void R_InitParticleTexture (void)
{
	int		x,y;
	byte	texsize = 16;//was 8
	byte	data[16][16][4];

	//
	// particle texture
	//
	particletexture = texture_extension_number++;
    GL_Bind(particletexture);

	for (x=0 ; x<texsize ; x++)
	{
		for (y=0 ; y<texsize ; y++)
		{
			data[y][x][0] = 255;
			data[y][x][1] = 255;
			data[y][x][2] = 255;
			data[y][x][3] = dottexture[x][y]*255;
		}
	}
	glTexImage2D (GL_TEXTURE_2D, 0, gl_alpha_format, texsize, texsize, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);

	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);

	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}

/*
===============
R_Envmap_f

Grab six views for environment mapping tests
===============
*/
void R_Envmap_f (void)
{
	byte	buffer[256*256*4];
	char	name[1024];

	glDrawBuffer  (GL_FRONT);
	glReadBuffer  (GL_FRONT);
	envmap = true;

	r_refdef.vrect.x = 0;
	r_refdef.vrect.y = 0;
	r_refdef.vrect.width = 256;
	r_refdef.vrect.height = 256;

	r_refdef.viewangles[0] = 0;
	r_refdef.viewangles[1] = 0;
	r_refdef.viewangles[2] = 0;
	GL_BeginRendering (&glx, &gly, &glwidth, &glheight);
	R_RenderView ();
	glReadPixels (0, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
	COM_WriteFile ("env0.rgb", buffer, sizeof(buffer));		

	r_refdef.viewangles[1] = 90;
	GL_BeginRendering (&glx, &gly, &glwidth, &glheight);
	R_RenderView ();
	glReadPixels (0, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
	COM_WriteFile ("env1.rgb", buffer, sizeof(buffer));		

	r_refdef.viewangles[1] = 180;
	GL_BeginRendering (&glx, &gly, &glwidth, &glheight);
	R_RenderView ();
	glReadPixels (0, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
	COM_WriteFile ("env2.rgb", buffer, sizeof(buffer));		

	r_refdef.viewangles[1] = 270;
	GL_BeginRendering (&glx, &gly, &glwidth, &glheight);
	R_RenderView ();
	glReadPixels (0, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
	COM_WriteFile ("env3.rgb", buffer, sizeof(buffer));		

	r_refdef.viewangles[0] = -90;
	r_refdef.viewangles[1] = 0;
	GL_BeginRendering (&glx, &gly, &glwidth, &glheight);
	R_RenderView ();
	glReadPixels (0, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
	COM_WriteFile ("env4.rgb", buffer, sizeof(buffer));		

	r_refdef.viewangles[0] = 90;
	r_refdef.viewangles[1] = 0;
	GL_BeginRendering (&glx, &gly, &glwidth, &glheight);
	R_RenderView ();
	glReadPixels (0, 0, 256, 256, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
	COM_WriteFile ("env5.rgb", buffer, sizeof(buffer));		

	envmap = false;
	glDrawBuffer  (GL_BACK);
	glReadBuffer  (GL_BACK);
	GL_EndRendering ();
}

/*
===============
R_Init
===============
*/
void R_Init (void)
{	
	extern byte *hunk_base;
	int counter;

	Cmd_AddCommand ("timerefresh", R_TimeRefresh_f);	
	Cmd_AddCommand ("envmap", R_Envmap_f);	
	Cmd_AddCommand ("pointfile", R_ReadPointFile_f);	

	Cvar_RegisterVariable (&r_norefresh);
	Cvar_RegisterVariable (&r_lightmap);
	Cvar_RegisterVariable (&r_fullbright);
	Cvar_RegisterVariable (&r_drawentities);
	Cvar_RegisterVariable (&r_drawviewmodel);
	Cvar_RegisterVariable (&r_shadows);
	Cvar_RegisterVariable (&r_mirroralpha);
	Cvar_RegisterVariable (&r_wateralpha);
	Cvar_RegisterVariable (&r_dynamic);
	Cvar_RegisterVariable (&r_novis);
	Cvar_RegisterVariable (&r_speeds);
	Cvar_RegisterVariable (&r_wholeframe);

	Cvar_RegisterVariable (&gl_clear);
	Cvar_RegisterVariable (&gl_texsort);
	Cvar_RegisterVariable (&gl_cull);
	Cvar_RegisterVariable (&gl_smoothmodels);
	Cvar_RegisterVariable (&gl_affinemodels);
	Cvar_RegisterVariable (&gl_polyblend);
	Cvar_RegisterVariable (&gl_flashblend);
	Cvar_RegisterVariable (&gl_playermip);
	Cvar_RegisterVariable (&gl_nocolors);

	Cvar_RegisterVariable (&gl_keeptjunctions);
	Cvar_RegisterVariable (&gl_reporttjunctions);

	R_InitParticles ();
	R_InitParticleTexture ();

#ifdef GLTEST
	Test_Init ();
#endif

	playertextures = texture_extension_number;
	texture_extension_number += 16;

	for(counter=0;counter<MAX_EXTRA_TEXTURES;counter++)
		gl_extra_textures[counter] = -1;

	playerTranslation = (byte *)COM_LoadHunkFile ("gfx/player.lmp");
	if (!playerTranslation)
		Sys_Error ("Couldn't load gfx/player.lmp");
}

extern int color_offsets[NUM_CLASSES];

/*
===============
R_TranslatePlayerSkin

Translates a skin texture by the per-player color lookup
===============
*/
void R_TranslatePlayerSkin (int playernum)
{
	extern	byte		player_8bit_texels[NUM_CLASSES][620*245];

	int		top, bottom;
	byte	translate[256];
	unsigned	translate32[256];
	int		i, j, s;
	model_t	*model;
	aliashdr_t *paliashdr;
	byte	*original;
	unsigned	pixels[512*256], *out;
	unsigned	scaled_width, scaled_height;
	int			inwidth, inheight;
	byte		*inrow;
	unsigned	frac, fracstep;
	byte	*sourceA, *sourceB, *colorA, *colorB;
	int		playerclass = (int)cl.scores[playernum].playerclass;

	for (i=0 ; i<256 ; i++)
		translate[i] = i;

	top = (cl.scores[playernum].colors & 0xf0) >> 4;
	bottom = (cl.scores[playernum].colors & 15);

	if (top > 10) top = 0;
	if (bottom > 10) bottom = 0;

	top -= 1;
	bottom -= 1;

	colorA = playerTranslation + 256 + color_offsets[playerclass-1];
	colorB = colorA + 256;
	sourceA = colorB + 256 + (top * 256);
	sourceB = colorB + 256 + (bottom * 256);
	for(i=0;i<256;i++,colorA++,colorB++,sourceA++,sourceB++)
	{
		if (top >= 0 && (*colorA != 255)) 
			translate[i] = *sourceA;
		if (bottom >= 0 && (*colorB != 255)) 
			translate[i] = *sourceB;
	}


	//
	// locate the original skin pixels
	//
	currententity = &cl_entities[1+playernum];
	model = currententity->model;
	if (!model)
		return;		// player doesn't have a model yet
	paliashdr = (aliashdr_t *)Mod_Extradata (model);
	s = paliashdr->skinwidth * paliashdr->skinheight;

	if (playerclass >= 1 && 
		playerclass <= NUM_CLASSES)
		original = player_8bit_texels[playerclass-1];
	else
		original = player_8bit_texels[0];

	if (s & 3)
		Sys_Error ("R_TranslateSkin: s&3");

	// because this happens during gameplay, do it fast
	// instead of sending it through gl_upload 8
    GL_Bind(playertextures + playernum);

#if 0
	byte	translated[320*200];

	for (i=0 ; i<s ; i+=4)
	{
		translated[i] = translate[original[i]];
		translated[i+1] = translate[original[i+1]];
		translated[i+2] = translate[original[i+2]];
		translated[i+3] = translate[original[i+3]];
	}


	// don't mipmap these, because it takes too long
	GL_Upload8 (translated, paliashdr->skinwidth, paliashdr->skinheight, false, false, true);
#else
	for (i=0 ; i<256 ; i++)
		translate32[i] = d_8to24table[translate[i]];
	scaled_width = gl_max_size.value < 512 ? gl_max_size.value : 512;
	scaled_height = gl_max_size.value < 256 ? gl_max_size.value : 256;

	// allow users to crunch sizes down even more if they want
	scaled_width >>= (int)gl_playermip.value;
	scaled_height >>= (int)gl_playermip.value;

	inwidth = paliashdr->skinwidth;
	inheight = paliashdr->skinheight;
	out = pixels;
	fracstep = inwidth*0x10000/scaled_width;
	for (i=0 ; i<scaled_height ; i++, out += scaled_width)
	{
		inrow = original + inwidth*(i*inheight/scaled_height);
		frac = fracstep >> 1;
		for (j=0 ; j<scaled_width ; j+=4)
		{
			out[j] = translate32[inrow[frac>>16]];
			frac += fracstep;
			out[j+1] = translate32[inrow[frac>>16]];
			frac += fracstep;
			out[j+2] = translate32[inrow[frac>>16]];
			frac += fracstep;
			out[j+3] = translate32[inrow[frac>>16]];
			frac += fracstep;
		}
	}
	glTexImage2D (GL_TEXTURE_2D, 0, gl_solid_format, scaled_width, scaled_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, pixels);

	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
#endif

}


/*
===============
R_NewMap
===============
*/
void R_NewMap (void)
{
	int		i;
	
	for (i=0 ; i<256 ; i++)
		d_lightstylevalue[i] = 264;		// normal light value

	memset (&r_worldentity, 0, sizeof(r_worldentity));
	r_worldentity.model = cl.worldmodel;

// clear out efrags in case the level hasn't been reloaded
// FIXME: is this one short?
	for (i=0 ; i<cl.worldmodel->numleafs ; i++)
		cl.worldmodel->leafs[i].efrags = NULL;
		 	
	r_viewleaf = NULL;
	R_ClearParticles ();

	GL_BuildLightmaps ();

	// identify sky texture
	skytexturenum = -1;
	mirrortexturenum = -1;
	for (i=0 ; i<cl.worldmodel->numtextures ; i++)
	{
		if (!cl.worldmodel->textures[i])
			continue;
		if (!strncmp(cl.worldmodel->textures[i]->name,"sky",3) )
			skytexturenum = i;
		if (!strncmp(cl.worldmodel->textures[i]->name,"window02_1",10) )
			mirrortexturenum = i;
	}
#ifdef QUAKE2
	R_LoadSkys ();
#endif
}


/*
====================
R_TimeRefresh_f

For program optimization
====================
*/
void R_TimeRefresh_f (void)
{
	int			i;
	float		start, stop, time;
	int			startangle;
	vrect_t		vr;

	glDrawBuffer  (GL_FRONT);
	glFinish ();

	start = Sys_FloatTime ();
	for (i=0 ; i<128 ; i++)
	{
		r_refdef.viewangles[1] = i/128.0*360.0;
		R_RenderView ();
	}

	glFinish ();
	stop = Sys_FloatTime ();
	time = stop-start;
	Con_Printf ("%f seconds (%f fps)\n", time, 128/time);

	glDrawBuffer  (GL_BACK);
	GL_EndRendering ();
}

void D_FlushCaches (void)
{
}