/*** thinlib (c) 2000 Matthew Conte (matt@conte.com)****** This program is free software; you can redistribute it and/or** modify it under the terms of version 2 of the GNU Library General ** Public License as published by the Free Software Foundation.**** 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 ** Library General Public License for more details.  To obtain a ** copy of the GNU Library General Public License, write to the Free ** Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.**** Any permitted reproduction of these routines, in whole or in part,** must bear this legend.****** tl_video.h**** thinlib video routines** $Id: tl_video.c,v 1.6 2001/03/12 06:06:56 matt Exp $*/#include "tl_types.h"#include "tl_video.h"#include "tl_vesa.h"#include "tl_vga.h"#include "tl_aa.h"#include "tl_log.h"typedef struct viddriver_s{   const char *name;   int  (*init)(int width, int height, int bpp);   void (*shutdown)(void);   int  (*setmode)(int width, int height, int bpp);   void (*setpalette)(rgb_t *palette, int index, int length);   void (*waitvsync)(void);   bitmap_t *(*lock)(void);   void (*free)(int num_dirties, rect_t *dirty_rects);   void (*blit)(bitmap_t *primary, int num_dirties, rect_t *dirty_rects);   void (*set_scanlines)(bool scanlines_on);   int  caps;   bool scanlines;} viddriver_t;static viddriver_t vesa ={   "VESA 3.0 LFB",   thin_vesa_init,   thin_vesa_shutdown,   thin_vesa_setmode,   thin_vga_setpalette,   thin_vga_waitvsync,   thin_vesa_lockwrite,   thin_vesa_freewrite,   NULL,   NULL,   0,   false};static viddriver_t vga ={   "VGA",   thin_vga_init,   thin_vga_shutdown,   thin_vga_setmode,   thin_vga_setpalette,   thin_vga_waitvsync,   thin_vga_lockwrite,   thin_vga_freewrite,   NULL,   thin_vga_scanlines,   THIN_VIDEO_SCANLINES,   false};#ifndef NO_AALIBstatic viddriver_t aalib ={   "aa-lib",   thin_aa_init,   thin_aa_shutdown,   thin_aa_setmode,   thin_aa_setpalette,   NULL,   thin_aa_lockwrite,   thin_aa_freewrite,   thin_aa_blit,   NULL,   THIN_VIDEO_CUSTOMBLIT,   false};#endif /* !NO_AALIB */static viddriver_t *driver_list[] = {   &vesa,   &vga,#ifndef NO_AALIB   &aalib,#endif /* !NO_AALIB */   NULL};static viddriver_t driver = {   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   0,   false};int thin_vid_init(int width, int height, int bpp){   /* cascade driver checks by iterating through all drivers */   viddriver_t **iter;   for (iter = driver_list; *iter != NULL; iter++)   {      if (0 == (*iter)->init(width, height, bpp))      {         driver = **iter;         return 0;      }   }   driver.name = NULL;   thin_printf("thin: could not find any matching video modes.\n");   return -1;}void thin_vid_shutdown(void){   if (NULL != driver.name)   {      driver.shutdown();      memset(&driver, 0, sizeof(viddriver_t));   }}int thin_vid_getcaps(void){   return driver.caps;}int thin_vid_scanlines(bool scanlines_on){   if (NULL == driver.set_scanlines       || 0 == (driver.caps & THIN_VIDEO_SCANLINES))   {      return -1;   }   if (scanlines_on != driver.scanlines)   {      driver.scanlines = scanlines_on;      driver.set_scanlines(scanlines_on);   }   return 0;}int thin_vid_setmode(int width, int height, int bpp){   if (driver.setmode(width, height, bpp))   {      thin_printf("thin: could not set %s video mode %dx%d %dbpp\n",                  driver.name, width, height, bpp);      return -1;   }   return 0;}void thin_vid_setpalette(rgb_t *palette, int index, int length){   driver.setpalette(palette, index, length);}bitmap_t *thin_vid_lockwrite(void){   return driver.lock();}void thin_vid_freewrite(int num_dirties, rect_t *dirty_rects){   if (NULL != driver.free)      driver.free(num_dirties, dirty_rects);}void thin_vid_customblit(bitmap_t *primary, int num_dirties,                         rect_t *dirty_rects){   THIN_ASSERT(driver.blit);   driver.blit(primary, num_dirties, dirty_rects);}/*** $Log: tl_video.c,v $** Revision 1.6  2001/03/12 06:06:56  matt** better keyboard driver, support for bit depths other than 8bpp**** Revision 1.5  2001/02/01 06:28:26  matt** thinlib now works under NT/2000**** Revision 1.4  2000/12/16 17:36:38  matt** let's not crash if we shut down video twice...**** Revision 1.3  2000/12/14 14:10:14  matt** cleaner initialization**** Revision 1.2  2000/11/25 20:28:34  matt** moved verboseness into correct places**** Revision 1.1  2000/11/06 02:21:29  matt** initial revision***/