src/video/fbcon/SDL_fbvideo.h
author Ryan C. Gordon <icculus@icculus.org>
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Date: Sat, 10 Dec 2005 18:29:41 +0100 From: Alberto Mardegan <mardy@users.sourceforge.net> To: sdl@libsdl.org Subject: [SDL] [PATCH] Touchscreen support to fbcon via tslib Hi all! I'm new to this list, I just subscribed. I've attached to this e-mail a patch I've written in order to add Touchscreen support to SDL's fbcon module via the tslib library. Since it introduces a new dependency, I've also edited the the configure.in file and added it as a compile-time option. This patch is especially useful for handhelds (I've tested it in my Zaurus). Please consider applying it. :-) -- Saluti, Mardy http://interlingua.altervista.org
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2004 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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 "@(#) $Id$";
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#endif
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#ifndef _SDL_fbvideo_h
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#define _SDL_fbvideo_h
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#include <sys/types.h>
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#include <termios.h>
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#include <linux/fb.h>
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#include "SDL_mouse.h"
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#include "SDL_mutex.h"
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#include "SDL_sysvideo.h"
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#ifdef HAVE_TSLIB
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#include "tslib.h"
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#endif
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/* Hidden "this" pointer for the video functions */
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#define _THIS	SDL_VideoDevice *this
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/* This is the structure we use to keep track of video memory */
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typedef struct vidmem_bucket {
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	struct vidmem_bucket *prev;
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	int used;
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	int dirty;
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	char *base;
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	unsigned int size;
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	struct vidmem_bucket *next;
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} vidmem_bucket;
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/* Private display data */
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struct SDL_PrivateVideoData {
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	int console_fd;
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	struct fb_var_screeninfo cache_vinfo;
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	struct fb_var_screeninfo saved_vinfo;
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	int saved_cmaplen;
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	__u16 *saved_cmap;
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	int current_vt;
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	int saved_vt;
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	int keyboard_fd;
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	int saved_kbd_mode;
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	struct termios saved_kbd_termios;
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	int mouse_fd;
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#ifdef HAVE_TSLIB
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	struct tsdev *ts_dev;
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#endif
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	char *mapped_mem;
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	int mapped_memlen;
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	int mapped_offset;
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	char *mapped_io;
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	long mapped_iolen;
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	int flip_page;
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	char *flip_address[2];
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#define NUM_MODELISTS	4		/* 8, 16, 24, and 32 bits-per-pixel */
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	int SDL_nummodes[NUM_MODELISTS];
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	SDL_Rect **SDL_modelist[NUM_MODELISTS];
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	vidmem_bucket surfaces;
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	int surfaces_memtotal;
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	int surfaces_memleft;
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	SDL_mutex *hw_lock;
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	void (*wait_vbl)(_THIS);
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	void (*wait_idle)(_THIS);
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};
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/* Old variable names */
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#define console_fd		(this->hidden->console_fd)
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#define current_vt		(this->hidden->current_vt)
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#define saved_vt		(this->hidden->saved_vt)
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#define keyboard_fd		(this->hidden->keyboard_fd)
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#define saved_kbd_mode		(this->hidden->saved_kbd_mode)
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#define saved_kbd_termios	(this->hidden->saved_kbd_termios)
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#define mouse_fd		(this->hidden->mouse_fd)
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#ifdef HAVE_TSLIB
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#define ts_dev			(this->hidden->ts_dev)
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#endif /* HAVE_TSLIB */
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#define cache_vinfo		(this->hidden->cache_vinfo)
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#define saved_vinfo		(this->hidden->saved_vinfo)
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#define saved_cmaplen		(this->hidden->saved_cmaplen)
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#define saved_cmap		(this->hidden->saved_cmap)
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#define mapped_mem		(this->hidden->mapped_mem)
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#define mapped_memlen		(this->hidden->mapped_memlen)
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#define mapped_offset		(this->hidden->mapped_offset)
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#define mapped_io		(this->hidden->mapped_io)
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#define mapped_iolen		(this->hidden->mapped_iolen)
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#define flip_page		(this->hidden->flip_page)
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#define flip_address		(this->hidden->flip_address)
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#define SDL_nummodes		(this->hidden->SDL_nummodes)
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#define SDL_modelist		(this->hidden->SDL_modelist)
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#define surfaces		(this->hidden->surfaces)
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#define surfaces_memtotal	(this->hidden->surfaces_memtotal)
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#define surfaces_memleft	(this->hidden->surfaces_memleft)
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#define hw_lock			(this->hidden->hw_lock)
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#define wait_vbl		(this->hidden->wait_vbl)
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#define wait_idle		(this->hidden->wait_idle)
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/* Accelerator types that are supported by the driver, but are not
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   necessarily in the kernel headers on the system we compile on.
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*/
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#ifndef FB_ACCEL_MATROX_MGAG400
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#define FB_ACCEL_MATROX_MGAG400	26	/* Matrox G400			*/
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#endif
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#ifndef FB_ACCEL_3DFX_BANSHEE
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#define FB_ACCEL_3DFX_BANSHEE	31	/* 3Dfx Banshee			*/
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#endif
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/* These functions are defined in SDL_fbvideo.c */
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extern void FB_SavePaletteTo(_THIS, int palette_len, __u16 *area);
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extern void FB_RestorePaletteFrom(_THIS, int palette_len, __u16 *area);
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/* These are utility functions for working with video surfaces */
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static __inline__ void FB_AddBusySurface(SDL_Surface *surface)
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{
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	((vidmem_bucket *)surface->hwdata)->dirty = 1;
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}
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static __inline__ int FB_IsSurfaceBusy(SDL_Surface *surface)
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{
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	return ((vidmem_bucket *)surface->hwdata)->dirty;
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}
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static __inline__ void FB_WaitBusySurfaces(_THIS)
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{
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	vidmem_bucket *bucket;
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	/* Wait for graphic operations to complete */
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	wait_idle(this);
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	/* Clear all surface dirty bits */
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	for ( bucket=&surfaces; bucket; bucket=bucket->next ) {
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		bucket->dirty = 0;
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	}
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}
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static __inline__ void FB_dst_to_xy(_THIS, SDL_Surface *dst, int *x, int *y)
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{
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	*x = (long)((char *)dst->pixels - mapped_mem)%this->screen->pitch;
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	*y = (long)((char *)dst->pixels - mapped_mem)/this->screen->pitch;
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	if ( dst == this->screen ) {
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		*x += this->offset_x;
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		*y += this->offset_y;
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	}
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}
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0
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#endif /* _SDL_fbvideo_h */