newtree/source/vid_sdl.c

/*
	vid_sdl.c

	Video driver for Sam Lantinga's Simple DirectMedia Layer

	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:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <SDL.h>

#include "cvar.h"
#include "d_local.h"
#include "host.h"
#include "qendian.h"
#include "sys.h"
#include "va.h"
#include "vid.h"

// static float oldin_grab = 0;

cvar_t  *vid_fullscreen;
extern viddef_t    vid;                // global video state
unsigned short  d_8to16table[256];

int modestate; // fixme: just to avoid cross-comp. errors - remove later
                                                        
// The original defaults
#define    BASEWIDTH    320
#define    BASEHEIGHT   200

int    VGA_width, VGA_height, VGA_rowbytes, VGA_bufferrowbytes = 0;
byte    *VGA_pagebase;

static SDL_Surface *screen = NULL;

void
VID_InitBuffers (int width, int height)
{
	int tbuffersize, tcachesize;
	void *vid_surfcache;

	// Calculate the sizes we want first
	tbuffersize = vid.width * vid.height * sizeof (*d_pzbuffer);
	tcachesize = D_SurfaceCacheForRes(width, height);

	// Free the old z-buffer
	if (d_pzbuffer) {
		free (d_pzbuffer);
		d_pzbuffer = NULL;
	}

	// Free the old surface cache
	vid_surfcache = D_SurfaceCacheAddress ();
	if (vid_surfcache) {
		D_FlushCaches ();
		free (vid_surfcache);
		vid_surfcache = NULL;
	}

	// Allocate the new z-buffer
	d_pzbuffer = calloc (tbuffersize, 1);
	if (!d_pzbuffer) {
		Sys_Error ("Not enough memory for video mode\n");
	}

	// Allocate the new surface cache; free the z-buffer if we fail
	vid_surfcache = calloc (tcachesize, 1);
	if (!vid_surfcache) {
		free (d_pzbuffer);
		d_pzbuffer = NULL;
		Sys_Error ("Not enough memory for video mode\n");
	}

	D_InitCaches (vid_surfcache, tcachesize);
}

void
VID_SetPalette (unsigned char *palette)
{
    int i;
    SDL_Color colors[256];

    for ( i=0; i<256; ++i ) {
        colors[i].r = *palette++;
        colors[i].g = *palette++;
        colors[i].b = *palette++;
    }
    SDL_SetColors (screen, colors, 0, 256);
}

void
VID_ShiftPalette (unsigned char *palette)
{
    VID_SetPalette (palette);
}

void
VID_Init (unsigned char *palette)
{
    //Uint8 video_bpp;
    //Uint16 video_w, video_h;
    Uint32 flags;

    // Load the SDL library
    if (SDL_Init(SDL_INIT_VIDEO)<0) //|SDL_INIT_AUDIO|SDL_INIT_CDROM) < 0)
	    Sys_Error("VID: Couldn't load SDL: %s", SDL_GetError());

    // Set up display mode (width and height)
    VID_GetWindowSize (BASEWIDTH, BASEHEIGHT);
    vid.maxwarpwidth = WARP_WIDTH;
    vid.maxwarpheight = WARP_HEIGHT;

    // Set video width, height and flags
    flags = (SDL_SWSURFACE|SDL_HWPALETTE);
    if ( vid_fullscreen->int_val )
        flags |= SDL_FULLSCREEN;

    // Initialize display
    if (!(screen = SDL_SetVideoMode(vid.width, vid.height, 8, flags)))
        Sys_Error("VID: Couldn't set video mode: %s\n", SDL_GetError());
    VID_SetPalette(palette);
    VID_SetCaption("");

    // now know everything we need to know about the buffer
    VGA_width = vid.conwidth = vid.width;
    VGA_height = vid.conheight = vid.height;
    vid.aspect = ((float)vid.height / (float)vid.width) * (320.0 / 240.0);
    vid.numpages = 1;
    vid.colormap = host_colormap;
    vid.fullbright = 256 - LittleLong (*((int *)vid.colormap + 2048));
    VGA_pagebase = vid.buffer = screen->pixels;
    VGA_rowbytes = vid.rowbytes = screen->pitch;
    vid.conbuffer = vid.buffer;
    vid.conrowbytes = vid.rowbytes;
    vid.direct = 0;

    // allocate z buffer and surface cache
    VID_InitBuffers (vid.width, vid.height);

    // initialize the mouse
    SDL_ShowCursor(0);

}

void
VID_Init_Cvars ()
{
    vid_fullscreen = Cvar_Get ("vid_fullscreen", "0", CVAR_ROM, "Toggles fullscreen game mode");
}

void
VID_Shutdown (void)
{
    SDL_Quit();
}

void
VID_Update (vrect_t *rects)
{
    SDL_Rect *sdlrects;
    int n, i;
    vrect_t *rect;

    // Two-pass system, since Quake doesn't do it the SDL way...

    // First, count the number of rectangles
    n = 0;
    for (rect = rects; rect; rect = rect->pnext)
        ++n;

    // Second, copy them to SDL rectangles and update
	if(!(sdlrects=(SDL_Rect *)calloc(1,n*sizeof(SDL_Rect))))
        	Sys_Error("Out of memory!");
    i = 0;
    for (rect = rects; rect; rect = rect->pnext) {
        sdlrects[i].x = rect->x;
        sdlrects[i].y = rect->y;
        sdlrects[i].w = rect->width;
        sdlrects[i].h = rect->height;
        ++i;
    }
    SDL_UpdateRects(screen, n, sdlrects);
}

/*
================
D_BeginDirectRect
================
*/
void
D_BeginDirectRect (int x, int y, byte *pbitmap, int width, int height)
{
    Uint8 *offset;


    if (!screen) return;
    if ( x < 0 ) x = screen->w+x-1;
    offset = (Uint8 *)screen->pixels + y*screen->pitch + x;
    while ( height-- ) {
        memcpy(offset, pbitmap, width);
        offset += screen->pitch;
        pbitmap += width;
    }
}

/*
================
D_EndDirectRect
================
*/
void
D_EndDirectRect (int x, int y, int width, int height)
{
    if (!screen) return;
    if (x < 0) x = screen->w+x-1;
    SDL_UpdateRect(screen, x, y, width, height);
}

void    
VID_LockBuffer ( void )
{
}       

void
VID_UnlockBuffer ( void )
{
}       

void
VID_SetCaption (char *text)
{
	if (text && *text) {
		char *temp = strdup (text);
		SDL_WM_SetCaption(va ("%s %s: %s", PROGRAM, VERSION, temp), NULL);
		free (temp);
	} else {
		SDL_WM_SetCaption(va ("%s %s", PROGRAM, VERSION), NULL);
	}
}