git.sesse.net Git - vlc/blob - plugins/glide/vout_glide.c

   1 /*****************************************************************************
   2  * vout_glide.c: 3dfx video output display method for 3dfx cards
   3  *****************************************************************************
   4  * Copyright (C) 2000 VideoLAN
   5  *
   6  * Authors:
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  21  *****************************************************************************/
  22
  23 /*****************************************************************************
  24  * Preamble
  25  *****************************************************************************/
  26 #include "defs.h"
  27
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <stdlib.h>                                                /* free() */
  30 #include <string.h>                                            /* strerror() */
  31
  32 #ifndef __linux__
  33 #include <conio.h>                                            /* for glide ? */
  34 #endif
  35 #include <glide.h>
  36
  37 #include "config.h"
  38 #include "common.h"
  39 #include "threads.h"
  40 #include "mtime.h"
  41 #include "plugins.h"
  42
  43 #include "video.h"
  44 #include "video_output.h"
  45
  46 #include "intf_msg.h"
  47 #include "main.h"
  48
  49 #define WIDTH 640
  50 #define HEIGHT 480
  51 #define BITS_PER_PLANE 16
  52 #define BYTES_PER_PIXEL 2
  53
  54 /*****************************************************************************
  55  * vout_sys_t: Glide video output method descriptor
  56  *****************************************************************************
  57  * This structure is part of the video output thread descriptor.
  58  * It describes the Glide specific properties of an output thread.
  59  *****************************************************************************/
  60 typedef struct vout_sys_s
  61 {
  62     GrLfbInfo_t                 p_buffer_info;           /* back buffer info */
  63
  64     /* Dummy video memory */
  65     byte_t *                    p_video;                      /* base adress */
  66     size_t                      i_page_size;                    /* page size */
  67
  68 } vout_sys_t;
  69
  70 /*****************************************************************************
  71  * Local prototypes
  72  *****************************************************************************/
  73 static int     GlideOpenDisplay   ( vout_thread_t *p_vout );
  74 static void    GlideCloseDisplay  ( vout_thread_t *p_vout );
  75
  76 /*****************************************************************************
  77  * vout_GlideCreate: allocates Glide video thread output method
  78  *****************************************************************************
  79  * This function allocates and initializes a Glide vout method.
  80  *****************************************************************************/
  81 int vout_GlideCreate( vout_thread_t *p_vout, char *psz_display,
  82                     int i_root_window, void *p_data )
  83 {
  84     /* Allocate structure */
  85     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  86     if( p_vout->p_sys == NULL )
  87     {
  88         intf_ErrMsg("error: %s\n", strerror(ENOMEM) );
  89         return( 1 );
  90     }
  91
  92     /* Open and initialize device */
  93     if( GlideOpenDisplay( p_vout ) )
  94     {
  95         intf_ErrMsg("vout error: can't open display\n");
  96         free( p_vout->p_sys );
  97         return( 1 );
  98     }
  99
 100     return( 0 );
 101 }
 102
 103 /*****************************************************************************
 104  * vout_GlideInit: initialize Glide video thread output method
 105  *****************************************************************************/
 106 int vout_GlideInit( vout_thread_t *p_vout )
 107 {
 108     return( 0 );
 109 }
 110
 111 /*****************************************************************************
 112  * vout_GlideEnd: terminate Glide video thread output method
 113  *****************************************************************************/
 114 void vout_GlideEnd( vout_thread_t *p_vout )
 115 {
 116     ;
 117 }
 118
 119 /*****************************************************************************
 120  * vout_GlideDestroy: destroy Glide video thread output method
 121  *****************************************************************************
 122  * Terminate an output method created by vout_CreateOutputMethod
 123  *****************************************************************************/
 124 void vout_GlideDestroy( vout_thread_t *p_vout )
 125 {
 126     GlideCloseDisplay( p_vout );
 127     free( p_vout->p_sys );
 128 }
 129
 130 /*****************************************************************************
 131  * vout_GlideManage: handle Glide events
 132  *****************************************************************************
 133  * This function should be called regularly by video output thread. It manages
 134  * console events. It returns a non null value on error.
 135  *****************************************************************************/
 136 int vout_GlideManage( vout_thread_t *p_vout )
 137 {
 138     return 0;
 139 }
 140
 141 /*****************************************************************************
 142  * vout_GlideDisplay: displays previously rendered output
 143  *****************************************************************************
 144  * This function send the currently rendered image to Glide image, waits until
 145  * it is displayed and switch the two rendering buffers, preparing next frame.
 146  *****************************************************************************/
 147 void vout_GlideDisplay( vout_thread_t *p_vout )
 148 {
 149     grLfbUnlock( GR_LFB_WRITE_ONLY, GR_BUFFER_BACKBUFFER );
 150
 151     grBufferSwap( 0 );
 152
 153     if ( grLfbLock(GR_LFB_WRITE_ONLY, GR_BUFFER_BACKBUFFER,
 154                    GR_LFBWRITEMODE_565, GR_ORIGIN_UPPER_LEFT, FXFALSE,
 155                    &p_vout->p_sys->p_buffer_info) == FXFALSE )
 156     {
 157         intf_ErrMsg( "vout error: can't take 3dfx back buffer lock\n" );
 158     }
 159 }
 160
 161 /* following functions are local */
 162
 163 /*****************************************************************************
 164  * GlideOpenDisplay: open and initialize 3dfx device
 165  *****************************************************************************/
 166
 167 static int GlideOpenDisplay( vout_thread_t *p_vout )
 168 {
 169     static char version[80];
 170     GrHwConfiguration hwconfig;
 171     GrScreenResolution_t resolution = GR_RESOLUTION_640x480;
 172     GrLfbInfo_t p_front_buffer_info;                    /* front buffer info */
 173
 174     p_vout->i_width =                   WIDTH;
 175     p_vout->i_height =                  HEIGHT;
 176     p_vout->i_screen_depth =            BITS_PER_PLANE;
 177     p_vout->i_bytes_per_pixel =         BYTES_PER_PIXEL;
 178     /* bytes per line value overriden later */
 179     p_vout->i_bytes_per_line =          1024 * BYTES_PER_PIXEL;
 180
 181     p_vout->p_sys->i_page_size = WIDTH * HEIGHT * BYTES_PER_PIXEL;
 182
 183     p_vout->i_red_mask =   0xf800;
 184     p_vout->i_green_mask = 0x07e0;
 185     p_vout->i_blue_mask =  0x001f;
 186
 187     /* Map two framebuffers a the very beginning of the fb */
 188     p_vout->p_sys->p_video = malloc( p_vout->p_sys->i_page_size * 2 );
 189     if( (int)p_vout->p_sys->p_video == -1 )
 190     {
 191         intf_ErrMsg( "vout error: can't map video memory (%s)\n",
 192                      strerror(errno) );
 193         return( 1 );
 194     }
 195
 196     grGlideGetVersion( version );
 197     grGlideInit();
 198
 199     if( !grSstQueryHardware(&hwconfig) )
 200     {
 201         intf_ErrMsg( "vout error: can't get 3dfx hardware config\n" );
 202         return( 1 );
 203     }
 204
 205     grSstSelect( 0 );
 206     if( !grSstWinOpen(0, resolution, GR_REFRESH_60Hz,
 207                         GR_COLORFORMAT_ABGR, GR_ORIGIN_UPPER_LEFT, 2, 1) )
 208     {
 209         intf_ErrMsg( "vout error: can't open 3dfx screen\n" );
 210         return( 1 );
 211     }
 212
 213     /* disable dithering */
 214     //grDitherMode( GR_DITHER_DISABLE );
 215
 216     /* clear both buffers */
 217     grRenderBuffer( GR_BUFFER_BACKBUFFER );
 218     grBufferClear( 0, 0, 0 );
 219     grRenderBuffer( GR_BUFFER_FRONTBUFFER );
 220     grBufferClear( 0, 0, 0 );
 221     grRenderBuffer( GR_BUFFER_BACKBUFFER );
 222
 223     p_vout->p_sys->p_buffer_info.size = sizeof( GrLfbInfo_t );
 224     p_front_buffer_info.size          = sizeof( GrLfbInfo_t );
 225
 226     /* lock the buffers to find their adresses */
 227     if ( grLfbLock(GR_LFB_WRITE_ONLY, GR_BUFFER_FRONTBUFFER,
 228                    GR_LFBWRITEMODE_565, GR_ORIGIN_UPPER_LEFT, FXFALSE,
 229                    &p_front_buffer_info) == FXFALSE )
 230     {
 231         intf_ErrMsg( "vout error: can't take 3dfx front buffer lock\n" );
 232         grGlideShutdown();
 233         return( 1 );
 234     }
 235     grLfbUnlock( GR_LFB_WRITE_ONLY, GR_BUFFER_FRONTBUFFER );
 236
 237     if ( grLfbLock(GR_LFB_WRITE_ONLY, GR_BUFFER_BACKBUFFER,
 238                    GR_LFBWRITEMODE_565, GR_ORIGIN_UPPER_LEFT, FXFALSE,
 239                    &p_vout->p_sys->p_buffer_info) == FXFALSE )
 240     {
 241         intf_ErrMsg( "vout error: can't take 3dfx back buffer lock\n" );
 242         grGlideShutdown();
 243         return( 1 );
 244     }
 245     grLfbUnlock(GR_LFB_WRITE_ONLY, GR_BUFFER_BACKBUFFER );
 246
 247     /* Get the number of bytes per line */
 248     p_vout->i_bytes_per_line = p_vout->p_sys->p_buffer_info.strideInBytes;
 249
 250     grBufferClear( 0, 0, 0 );
 251
 252     /* Set and initialize buffers */
 253     vout_SetBuffers( p_vout, p_vout->p_sys->p_buffer_info.lfbPtr,
 254                      p_front_buffer_info.lfbPtr );
 255
 256     return( 0 );
 257 }
 258
 259 /*****************************************************************************
 260  * GlideCloseDisplay: close and reset 3dfx device
 261  *****************************************************************************
 262  * Returns all resources allocated by GlideOpenDisplay and restore the original
 263  * state of the device.
 264  *****************************************************************************/
 265 static void GlideCloseDisplay( vout_thread_t *p_vout )
 266 {
 267     /* unlock the hidden buffer */
 268     grLfbUnlock( GR_LFB_WRITE_ONLY, GR_BUFFER_BACKBUFFER );
 269
 270     /* shutdown Glide */
 271     grGlideShutdown();
 272     free( p_vout->p_sys->p_video );
 273 }
 274