/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// r_misc.c

#include "quakedef.h"


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

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

	if (!r_render.value)
		return;

	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;
	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;
	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;
	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;
	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;
	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 ();
}

void R_InitParticles (void);

void gl_misc_start(void)
{
}

void gl_misc_shutdown(void)
{
}

void gl_misc_newmap(void)
{
}

/*
===============
R_Init
===============
*/
void GL_Misc_Init (void)
{	
	Cmd_AddCommand ("envmap", R_Envmap_f);	
	Cmd_AddCommand ("timerefresh", R_TimeRefresh_f);	

	R_RegisterModule("GL_Misc", gl_misc_start, gl_misc_shutdown, gl_misc_newmap);
}

extern void R_ClearParticles (void);
extern void GL_BuildLightmaps (void);

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

	r_viewleaf = NULL;
	R_Modules_NewMap();

	GL_BuildLightmaps ();

	SHOWLMP_clear();
}


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

For program optimization
====================
*/
qboolean intimerefresh = 0;
void R_TimeRefresh_f (void)
{
	int			i;
	float		start, stop, time;

	intimerefresh = 1;
	start = Sys_DoubleTime ();
	for (i = 0;i < 128;i++)
	{
		r_refdef.viewangles[0] = 0;
		r_refdef.viewangles[1] = i/128.0*360.0;
		r_refdef.viewangles[2] = 0;
		SCR_UpdateScreen();
	}

	stop = Sys_DoubleTime ();
	intimerefresh = 0;
	time = stop-start;
	Con_Printf ("%f seconds (%f fps)\n", time, 128/time);
}