libvo/vo_svga.c

   1 /*
   2  * video driver for SVGAlib
   3  * by Zoltan Mark Vician <se7en@sch.bme.hu>
   4  * Code started: Mon Apr  1 23:25:47 2001
   5  * Some changes by Matan Ziv-Av <matan@svgalib.org>
   6  * complete rewrite by Ivan Kalvachev 19 Mar 2003
   7  *
   8  * This file is part of MPlayer.
   9  *
  10  * MPlayer is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * MPlayer is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  22  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  23  */
  24
  25 /*
  26 Wrangings:
  27  -  1bpp doesn't work right for me with '-double' and svgalib 1.4.3,
  28     but works OK with svgalib 1.9.17
  29  -  The HW acceleration is not tested - svgalibs supports few chipsets,
  30     and i don't have any of them. If it works for you then let me know.
  31     I will remove this warning after confirm its status.
  32  -  retrace sync works only in doublebuffer mode.
  33  -  the retrace sync may slow down decoding a lot - mplayer is blocked while
  34     waiting for retrace
  35  -  denoise3d fails to find common colorspace, use -vf denoise3d,scale
  36
  37 TODO:
  38  - let choose_best_mode take aspect into account
  39  - set palette from mpi->palette or mpi->plane[1]
  40  - make faster OSD black bars clear - need some OSD changes
  41  - Make nicer CONFIG parsing
  42  - change video mode logical width to match img->stride[0] - for HW only
  43 */
  44
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48
  49 #include <vga.h>
  50
  51 #include <limits.h>
  52
  53 #include "config.h"
  54 #include "video_out.h"
  55 #include "video_out_internal.h"
  56 #include "fastmemcpy.h"
  57 #include "osdep/getch2.h"
  58 #ifdef CONFIG_VIDIX
  59 #include "vosub_vidix.h"
  60 #endif
  61
  62 #include "sub.h"
  63
  64 #include "mp_msg.h"
  65 //#include "mp_image.h"
  66
  67 #include <assert.h>
  68
  69
  70 static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src,
  71                        unsigned char *srca, int stride);
  72 static uint32_t get_image(mp_image_t *mpi);
  73
  74 #define MAXPAGES 16
  75 #define PAGE_EMPTY 0
  76 #define PAGE_BUSY 1
  77
  78 #define CAP_ACCEL_CLEAR 8
  79 #define CAP_ACCEL_PUTIMAGE 4
  80 #define CAP_ACCEL_BACKGR 2
  81 #define CAP_LINEAR 1
  82
  83 static uint8_t zerobuf[8192];//used when clear screen with vga_draw
  84
  85 static int squarepix;
  86 static int force_vm=0;
  87 static int force_native=0;
  88 static int sync_flip=0;
  89 static int blackbar_osd=0;
  90 static int cpage,max_pages,old_page;
  91
  92 static vga_modeinfo * modeinfo;
  93 static int mode_stride; //keep it in case of vga_setlogicalwidth
  94 static int stride_granularity; //not yet used
  95 static int mode_bpp;
  96 static int mode_capabilities;
  97
  98 static int image_width,image_height; // used by OSD
  99 static int x_pos, y_pos;
 100
 101 static struct {
 102     int yoffset;//y position of the page
 103     int doffset;//display start of the page
 104     uint8_t * vbase;//memory start address of the page
 105     int locks;
 106 }PageStore[MAXPAGES];
 107
 108 static const vo_info_t info = {
 109     "SVGAlib",
 110     "svga",
 111     "Ivan Kalvachev <iive@users.sf.net>",
 112     ""
 113 };
 114
 115 #ifdef CONFIG_VIDIX
 116 static char vidix_name[32] = "";
 117 static vidix_grkey_t gr_key;
 118 #endif
 119
 120 LIBVO_EXTERN(svga)
 121
 122
 123 //return number of 1'st free page or -1 if no free one
 124 static inline int page_find_free(void){
 125     int i;
 126     for(i=0;i<max_pages;i++)
 127         if(PageStore[i].locks == PAGE_EMPTY) return i;
 128     return -1;
 129 }
 130
 131 static int preinit(const char *arg)
 132 {
 133     int i,rez;
 134     char s[64];
 135
 136     getch2_disable();
 137     memset(zerobuf,0,sizeof(zerobuf));
 138     force_vm=force_native=squarepix=0;
 139     sync_flip=vo_vsync;
 140     blackbar_osd=0;
 141
 142     if(arg)while(*arg) {
 143 #ifdef CONFIG_VIDIX
 144         if(memcmp(arg,"vidix",5)==0) {
 145             i=6;
 146             while(arg[i] && arg[i]!=':') i++;
 147             strncpy(vidix_name, arg+6, i-6);
 148             vidix_name[i-5]=0;
 149             if(arg[i]==':')i++;
 150             arg+=i;
 151             vidix_preinit(vidix_name, video_out_svga.old_functions);
 152         }
 153 #endif
 154         if(!strncmp(arg,"sq",2)) {
 155             squarepix=1;
 156             arg+=2;
 157             if( *arg == ':' ) arg++;
 158         }
 159
 160         if(!strncmp(arg,"native",6)) {
 161             force_native=1;
 162             arg+=6;
 163             if( *arg == ':' ) arg++;
 164         }
 165
 166         if(!strncmp(arg,"bbosd",5)) {
 167             blackbar_osd=1;
 168             arg+=5;
 169             if( *arg == ':' ) arg++;
 170         }
 171
 172         if(!strncmp(arg,"retrace",7)) {
 173             sync_flip=1;
 174             arg+=7;
 175             if( *arg == ':' ) arg++;
 176         }
 177
 178         if(*arg) {
 179             i=0;
 180             while(arg[i] && arg[i]!=':')i++;
 181             if(i<64){
 182                 strncpy(s, arg, i);
 183                 s[i]=0;
 184
 185                 force_vm=vga_getmodenumber(s);
 186                 if(force_vm>0) {
 187                     mp_msg(MSGT_VO,MSGL_V, "vo_svga: Forcing mode %i\n",force_vm);
 188                 }else{
 189                     force_vm = 0;
 190                 }
 191             }
 192             arg+=i;
 193             if(*arg==':')arg++;
 194         }
 195     }
 196
 197     rez = vga_init();
 198     if(rez != 0){
 199         mp_msg(MSGT_VO,MSGL_ERR, "vo_svga: vga_init() returned error=%d\n",rez);
 200     }
 201     return !!rez;
 202 }
 203
 204 static void svga_clear_box(int x,int y,int w,int h){
 205     uint8_t * rgbplane;
 206     int i;
 207
 208     if (mode_capabilities&CAP_ACCEL_CLEAR){
 209         mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: clearing box %d,%d - %d,%d with HW acceleration\n",
 210                x,y,w,h);
 211         if(mode_capabilities&CAP_ACCEL_BACKGR)
 212             vga_accel(ACCEL_SYNC);
 213         vga_accel(ACCEL_SETFGCOLOR,0);//black
 214         vga_accel(ACCEL_FILLBOX,x,y,w,h);
 215         return;
 216     }
 217     if (mode_capabilities & CAP_LINEAR){
 218         mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: clearing box %d,%d - %d,%d with memset\n",x,y,w,h);
 219         rgbplane=PageStore[0].vbase + (y*mode_stride) + (x*modeinfo->bytesperpixel);
 220         for(i=0;i<h;i++){
 221 //i'm afraid that memcpy is better optimized than memset;)
 222             fast_memcpy(rgbplane,zerobuf,w*modeinfo->bytesperpixel);
 223 //    memset(rgbplane,0,w*modeinfo->bytesperpixel);
 224             rgbplane+=mode_stride;
 225         }
 226         return;
 227     }
 228     //native
 229     mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: clearing box %d,%d - %d,%d with native draw \n",x,y,w,h);
 230     if(modeinfo->bytesperpixel!=0) w*=modeinfo->bytesperpixel;
 231     for(i=0;i<h;i++){
 232         vga_drawscansegment(zerobuf,x,y+i,w);
 233     }
 234 };
 235
 236 static uint32_t svga_draw_image(mp_image_t *mpi){
 237     int i,x,y,w,h;
 238     int stride;
 239     uint8_t *rgbplane, *base;
 240     int bytesperline;
 241     int page;
 242
 243     if(mpi->flags & MP_IMGFLAG_DIRECT){
 244         mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: drawing direct rendered surface\n");
 245         cpage=(uint32_t)mpi->priv;
 246         assert((cpage>=0)&&(cpage<max_pages));
 247         return VO_TRUE; //it's already done
 248     }
 249 //  if (mpi->flags&MP_IMGFLAGS_DRAWBACK)
 250 //  return VO_TRUE;//direct render method 2
 251
 252 //find a free page to draw into
 253 //if there is no one then use the current one
 254     page = page_find_free();
 255     if(page>=0) cpage=page;
 256     PageStore[cpage].locks=PAGE_BUSY;
 257
 258 // these variables are used in loops
 259     x = mpi->x;
 260     y = mpi->y;
 261     w = mpi->w;
 262     h = mpi->h;
 263     stride = mpi->stride[0];
 264     rgbplane = mpi->planes[0] + y*stride + (x*mpi->bpp)/8;
 265     x+=x_pos;//center
 266     y+=y_pos;
 267
 268     if(mpi->bpp >= 8){//for modes<8 use only native
 269         if( (mode_capabilities&CAP_ACCEL_PUTIMAGE) && (x==0) && (w==mpi->width) &&
 270             (stride == mode_stride) ){ //only monolite image can be accelerated
 271             w=(stride*8)/mpi->bpp;//we transfer pixels in the stride so the source
 272 //ACCELERATE
 273             mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: using HW PutImage (x=%d,y=%d,w=%d,h=%d)\n",x,y,w,h);
 274             if(mode_capabilities & CAP_ACCEL_BACKGR)
 275                 vga_accel(ACCEL_SYNC);
 276
 277             vga_accel(ACCEL_PUTIMAGE,x,y+PageStore[cpage].yoffset,w,h,rgbplane);
 278             return VO_TRUE;
 279         }
 280
 281         if( mode_capabilities&CAP_LINEAR){
 282 //DIRECT
 283             mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: using Direct memcpy (x=%d,y=%d,w=%d,h=%d)\n",x,y,w,h);
 284             bytesperline=(w*mpi->bpp)/8;
 285             base=PageStore[cpage].vbase + (y*mode_stride) + (x*mpi->bpp)/8;
 286
 287             for(i=0;i<h;i++){
 288                 mem2agpcpy(base,rgbplane,bytesperline);
 289                 base+=mode_stride;
 290                 rgbplane+=stride;
 291             }
 292             return VO_TRUE;
 293         }
 294     }//(modebpp>=8
 295
 296
 297 //NATIVE
 298     {
 299         int length;
 300         length=(w*mpi->bpp)/8;
 301         //one byte per pixel! svgalib innovation
 302         if(mpi->imgfmt==IMGFMT_RG4B || mpi->imgfmt==IMGFMT_BG4B) length=w;
 303
 304         mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: using Native vga_draw(x=%d,y=%d,w=%d,h=%d)\n",x,y,w,h);
 305         y+=PageStore[cpage].yoffset;//y position of the page beggining
 306         for(i=0;i<h;i++){
 307             vga_drawscansegment(rgbplane,x,y+i,length);
 308             rgbplane+=stride;
 309         }
 310     }
 311     return VO_TRUE;
 312 }
 313
 314 static int bpp_from_vminfo(vga_modeinfo *vminfo){
 315     switch(vminfo->colors){
 316         case 2: return 1;
 317         case 16: return 4;
 318         case 256: return 8;
 319         case 32768: return 15;
 320         case 65536: return 16;
 321         case 1<<24: return 8*vminfo->bytesperpixel;
 322     }
 323     return 0;
 324 }
 325
 326 static int find_best_svga_mode(int req_w,int req_h, int req_bpp){
 327     int badness,prev_badness;
 328     int bestmode,lastmode;
 329     int i;
 330     vga_modeinfo *vminfo;
 331 //int best aspect mode // best linear mode // best normal mode (no modeX)
 332
 333     prev_badness = 0;//take care of special case below
 334     bestmode = 0; //0 is the TEXT mode
 335     lastmode = vga_lastmodenumber();
 336     for(i=1;i<=lastmode;i++){
 337         vminfo = vga_getmodeinfo(i);
 338         if( vminfo == NULL ) continue;
 339         mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: testing mode %d (%s)\n",i,vga_getmodename(i));
 340         if( vga_hasmode(i) == 0 ) continue;
 341         if( req_bpp != bpp_from_vminfo(vminfo) )continue;
 342         if( (vminfo->width < req_w) || (vminfo->height < req_h) ) continue;
 343             badness=(vminfo->width * vminfo->height) - (req_h * req_w);
 344         //put here aspect calculations
 345         if(squarepix)
 346             if( vminfo->width*3 != vminfo->height*4 ) continue;
 347
 348         if( bestmode==0 || prev_badness >= badness ){//modeX etc...
 349             prev_badness=badness;
 350             bestmode=i;
 351             mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: found good mode %d with badness %d\n",i,badness);
 352         }
 353     }
 354     return bestmode;
 355 }
 356
 357 static int control(uint32_t request, void *data)
 358 {
 359     switch (request) {
 360         case VOCTRL_QUERY_FORMAT:
 361             return query_format(*((uint32_t*)data));
 362         case VOCTRL_DRAW_IMAGE:
 363             return svga_draw_image( (mp_image_t *)data);
 364         case VOCTRL_GET_IMAGE:
 365             return get_image(data);
 366     }
 367
 368 #ifdef CONFIG_VIDIX
 369     if (vidix_name[0])
 370         return vidix_control(request, data);
 371 #endif
 372
 373     return VO_NOTIMPL;
 374 }
 375
 376 //
 377 // This function is called to init the video driver for specific mode
 378 //
 379 static int config(uint32_t width, uint32_t height, uint32_t d_width,
 380                        uint32_t d_height, uint32_t flags, char *title,
 381                        uint32_t format) {
 382     int32_t req_w = width;// (d_width > 0 ? d_width : width);
 383     int32_t req_h = height;// (d_height > 0 ? d_height : height);
 384     uint16_t vid_mode = 0;
 385     int32_t req_bpp;
 386
 387     uint32_t accflags;
 388     mp_msg(MSGT_VO,MSGL_V, "vo_svga: config(%i, %i, %i, %i, %08x, %s, %08x)\n", width, height,
 389            d_width, d_height, flags, title, format);
 390 //Only RGB modes supported
 391     if (!IMGFMT_IS_RGB(format) && !IMGFMT_IS_BGR(format)) {assert(0);return -1;}
 392     req_bpp = IMGFMT_BGR_DEPTH(format);
 393
 394     if( vo_dbpp!=0 && vo_dbpp!=req_bpp) {assert(0);return-1;}
 395
 396     if(!force_vm) {
 397         mp_msg(MSGT_VO,MSGL_V, "vo_svga: Looking for the best resolution...\n");
 398         mp_msg(MSGT_VO,MSGL_V, "vo_svga: req_w: %d, req_h: %d, bpp: %d\n",req_w,req_h,req_bpp);
 399         vid_mode=find_best_svga_mode(req_w,req_h,req_bpp);
 400         if(vid_mode==0)
 401             return 1;
 402         modeinfo=vga_getmodeinfo(vid_mode);
 403     }else{//force_vm
 404         vid_mode=force_vm;
 405         if(vga_hasmode(vid_mode) == 0){
 406             mp_tmsg(MSGT_VO,MSGL_ERR, "[VO_SVGA] Forced vid_mode %d (%s) not available.\n",
 407                    vid_mode,vga_getmodename(vid_mode));
 408             return 1; //error;
 409         }
 410         modeinfo=vga_getmodeinfo(vid_mode);
 411         if( (modeinfo->width < req_w) || (modeinfo->height < req_h) ){
 412             mp_tmsg(MSGT_VO,MSGL_ERR, "[VO_SVGA] Forced vid_mode %d (%s) too small.\n",
 413                    vid_mode,vga_getmodename(vid_mode));
 414             return 1;
 415         }
 416     }
 417     mode_bpp=bpp_from_vminfo(modeinfo);
 418
 419     mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Vid_mode: %d, %dx%d %dbpp.\n",
 420            vid_mode,modeinfo->width,modeinfo->height,mode_bpp);
 421
 422     if (vga_setmode(vid_mode) == -1) {
 423         mp_tmsg(MSGT_VO,MSGL_ERR, "[VO_SVGA] Vga_setmode(%d) failed.\n",vid_mode);
 424         uninit();
 425         return 1; // error
 426     }
 427     /* set 332 palette for 8 bpp */
 428     if(mode_bpp==8){
 429         int i;
 430         for(i=0; i<256; i++)
 431             vga_setpalette(i, ((i>>5)&7)*9, ((i>>2)&7)*9, (i&3)*21);
 432     }
 433     /* set 121 palette for 4 bpp */
 434     else if(mode_bpp==4){
 435         int i;
 436         for(i=0; i<16; i++)
 437         vga_setpalette(i, ((i>>3)&1)*63, ((i>>1)&3)*21, (i&1)*63);
 438     }
 439     //if we change the logical width, we should know the granularity
 440     stride_granularity=8;//according to man vga_logicalwidth
 441     if(modeinfo->flags & EXT_INFO_AVAILABLE){
 442         stride_granularity=modeinfo->linewidth_unit;
 443     }
 444     //look for hardware acceleration
 445     mode_capabilities=0;//NATIVE;
 446     if(!force_native){//if we want to use only native drawers
 447         if(modeinfo->flags & HAVE_EXT_SET){//support for hwaccel interface
 448             accflags=vga_ext_set(VGA_EXT_AVAILABLE,VGA_AVAIL_ACCEL);
 449             if(accflags & ACCELFLAG_FILLBOX) // clear screen
 450                 mode_capabilities|=CAP_ACCEL_CLEAR;
 451             if(accflags & ACCELFLAG_PUTIMAGE)//support for mem->vid transfer
 452                 mode_capabilities|=CAP_ACCEL_PUTIMAGE;
 453             if((accflags & ACCELFLAG_SETMODE) && (accflags & ACCELFLAG_SYNC)){
 454                 vga_accel(ACCEL_SETMODE,BLITS_IN_BACKGROUND);
 455                 mode_capabilities|=CAP_ACCEL_BACKGR;//can draw in backgraund
 456             }
 457         }
 458         if(modeinfo->flags & IS_LINEAR){
 459             mode_capabilities|=CAP_LINEAR; //don't use bank & vga_draw
 460         }
 461         else{
 462             if(modeinfo->flags & CAPABLE_LINEAR){
 463                 int vid_mem_size;
 464                 vid_mem_size = vga_setlinearaddressing();
 465                 if(vid_mem_size != -1){
 466                     modeinfo=vga_getmodeinfo(vid_mode);//sometimes they change parameters
 467                     mode_capabilities|=CAP_LINEAR;
 468                 }
 469             }
 470         }
 471     }//fi force native
 472     if(mode_capabilities&CAP_LINEAR){
 473         mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Video mode is linear and memcpy could be used for image transfer.\n");
 474     }
 475     if(mode_capabilities&CAP_ACCEL_PUTIMAGE){
 476         mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Video mode has hardware acceleration and put_image could be used.\n");
 477         mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] If it works for you I would like to know.\n[VO_SVGA] (send log with `mplayer test.avi -v -v -v -v &> svga.log`). Thx!\n");
 478     }
 479
 480 //here is the place to handle strides for accel_ modes;
 481     mode_stride=modeinfo->linewidth;
 482 //we may try to set a bigger stride for video mode that will match the mpi->stride,
 483 //this way we will transfer more data, but HW put_image can do it in backgraund!
 484
 485 //now let's see how many pages we can use
 486     max_pages = modeinfo->maxpixels/(modeinfo->height * modeinfo->width);
 487     if(max_pages > MAXPAGES) max_pages = MAXPAGES;
 488     if(!vo_doublebuffering) max_pages=1;
 489 //fill PageStore structs
 490     {
 491         int i;
 492         uint8_t * GRAPH_MEM;
 493         int dof;
 494         GRAPH_MEM=vga_getgraphmem();
 495         for(i=0;i<max_pages;i++){
 496             //calculate display offset
 497             dof = i * modeinfo->height * modeinfo->width;
 498             if(modeinfo->bytesperpixel != 0) dof*=modeinfo->bytesperpixel;
 499             //check video chip limitations
 500             if( dof != (dof & modeinfo->startaddressrange) ){
 501                 max_pages=i;//page 0 will never come here
 502                 break;
 503             }
 504             PageStore[i].yoffset = i * modeinfo->height;//starting y offset
 505             PageStore[i].vbase = GRAPH_MEM + i*modeinfo->height*mode_stride; //memory base address
 506             PageStore[i].doffset = dof; //display offset
 507             PageStore[i].locks = PAGE_EMPTY;
 508         }
 509     }
 510     assert(max_pages>0);
 511     mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Video mode has %d page(s).\n",max_pages);
 512     //15bpp
 513     if(modeinfo->bytesperpixel!=0)
 514         vga_claimvideomemory(max_pages * modeinfo->height * modeinfo->width * modeinfo->bytesperpixel);
 515     else
 516         vga_claimvideomemory(max_pages * modeinfo->height * modeinfo->width * mode_bpp / 8);
 517
 518     cpage=old_page=0;
 519     svga_clear_box(0,0,modeinfo->width,modeinfo->height * max_pages);
 520
 521     image_height=req_h;
 522     image_width=req_w;
 523     x_pos = (modeinfo->width  - req_w) / 2;
 524     y_pos = (modeinfo->height - req_h) / 2;
 525     x_pos &= ~(15); //align x offset position to 16 pixels
 526     mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Centering image. Starting at (%d,%d)\n",x_pos,y_pos);
 527
 528 #ifdef CONFIG_VIDIX
 529
 530     if(vidix_name[0]){
 531         vidix_init(width, height, x_pos, y_pos, modeinfo->width, modeinfo->height,
 532                    format, mode_bpp, modeinfo->width,modeinfo->height);
 533         mp_tmsg(MSGT_VO,MSGL_INFO, "[VO_SVGA] Using VIDIX. w=%i h=%i  mw=%i mh=%i\n",width,height,
 534                modeinfo->width,modeinfo->height);
 535         vidix_start();
 536         /*set colorkey*/
 537         if(vidix_grkey_support()){
 538             vidix_grkey_get(&gr_key);
 539             gr_key.key_op = KEYS_PUT;
 540             if (!(vo_colorkey & 0xFF000000)) {
 541                 gr_key.ckey.op = CKEY_TRUE;
 542                 gr_key.ckey.red = (vo_colorkey & 0x00FF0000) >> 16;
 543                 gr_key.ckey.green = (vo_colorkey & 0x0000FF00) >> 8;
 544                 gr_key.ckey.blue = vo_colorkey & 0x000000FF;
 545             } else
 546                 gr_key.ckey.op = CKEY_FALSE;
 547             vidix_grkey_set(&gr_key);
 548         }
 549     }
 550 #endif
 551
 552     vga_setdisplaystart(0);
 553     return 0;
 554 }
 555
 556 static int draw_slice(uint8_t *image[],int stride[],
 557                int w, int h, int x, int y) {
 558     assert(0);
 559     return VO_ERROR;//this is yv12 only -> vf_scale should do all transforms
 560 }
 561
 562 static int draw_frame(uint8_t *src[]) {
 563     assert(0);
 564     return VO_ERROR;//this one should not be called
 565 }
 566
 567 static void draw_osd(void)
 568 {
 569     mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: draw_osd()\n");
 570     //only modes with bytesperpixel>0 can draw OSD
 571     if(modeinfo->bytesperpixel==0) return;
 572     if(!(mode_capabilities&CAP_LINEAR)) return;//force_native will remove OSD
 573
 574     if(blackbar_osd){
 575 //111
 576 //3 4
 577 //222
 578         svga_clear_box(0,0 + PageStore[cpage].yoffset,
 579                        modeinfo->width, y_pos);
 580         svga_clear_box(0, image_height + y_pos + PageStore[cpage].yoffset,
 581                        modeinfo->width, modeinfo->height-(image_height+ y_pos));
 582         svga_clear_box(0, y_pos + PageStore[cpage].yoffset,
 583                        x_pos, image_height);
 584         svga_clear_box(image_width + x_pos, y_pos + PageStore[cpage].yoffset,
 585                        modeinfo->width-(x_pos+image_width), image_height);
 586 //    vo_remove_text(modeinfo->width, modeinfo->height, clear_alpha);
 587         vo_draw_text(modeinfo->width, modeinfo->height, draw_alpha);
 588     }else{
 589         vo_draw_text(image_width, image_height, draw_alpha);
 590     }
 591 }
 592
 593 static void flip_page(void) {
 594     PageStore[old_page].locks=PAGE_EMPTY;
 595     PageStore[cpage].locks=PAGE_BUSY;
 596
 597     mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: viewing page %d\n",cpage);
 598     if(sync_flip && old_page!=cpage){
 599         mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga:vga_waitretrace\n");
 600         vga_waitretrace();
 601     }
 602     vga_setdisplaystart(PageStore[cpage].doffset);
 603
 604     old_page=cpage;//cpage will be overwriten on next draw_image
 605 }
 606
 607 static void check_events(void) {
 608 }
 609
 610 static void uninit(void) {
 611
 612 #ifdef CONFIG_VIDIX
 613     if(vidix_name[0])vidix_term();
 614 #endif
 615     vga_setmode(TEXT);
 616 }
 617
 618 /* --------------------------------------------------------------------- */
 619 static int query_format(uint32_t format) {
 620     int32_t req_bpp,flags;
 621     int i,lastmode;
 622     vga_modeinfo * vminfo;
 623
 624     mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: query_format=%X \n",format);
 625 //only RGB modes supported
 626     if( (!IMGFMT_IS_RGB(format)) && (!IMGFMT_IS_BGR(format)) ) return 0;
 627
 628 // Reject different endian
 629 #if HAVE_BIGENDIAN
 630     if (IMGFMT_IS_BGR(format)) return 0;
 631 #else
 632     if (IMGFMT_IS_RGB(format)) return 0;
 633 #endif
 634
 635     //svgalib supports only BG4B! if we want BGR4 we have to emulate it (sw)
 636     if( format==IMGFMT_BGR4 || format==IMGFMT_RGB4) return 0;
 637     req_bpp = IMGFMT_RGB_DEPTH(format);
 638     if( vo_dbpp>0 && vo_dbpp!=req_bpp ) return 0; //support -bpp options
 639 //scan all modes
 640     lastmode = vga_lastmodenumber();
 641     for(i=1;i<=lastmode;i++){
 642         vminfo = vga_getmodeinfo(i);
 643         if( vminfo == NULL ) continue;
 644         if( vga_hasmode(i) == 0 ) continue;
 645         if( req_bpp != bpp_from_vminfo(vminfo) ) continue;
 646         if( (force_vm > 0) && (force_vm != i) )  continue;//quick hack
 647         flags = VFCAP_CSP_SUPPORTED|
 648                 VFCAP_CSP_SUPPORTED_BY_HW|
 649                 VFCAP_ACCEPT_STRIDE|
 650                 0;
 651         if(req_bpp>8) flags|=VFCAP_OSD;
 652         return flags;
 653     }
 654     return 0;
 655 }
 656
 657 static void draw_alpha(int x0, int y0, int w, int h, unsigned char *src,
 658                        unsigned char *srca, int stride) {
 659     char* base;
 660
 661     mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: draw_alpha(x0=%d,y0=%d,w=%d,h=%d,src=%p,srca=%p,stride=%d\n",
 662            x0,y0,w,h,src,srca,stride);
 663     if(!blackbar_osd) {
 664         //drawing in the image, so place the stuff there
 665         x0+=x_pos;
 666         y0+=y_pos;
 667     }
 668
 669     mp_msg(MSGT_VO,MSGL_DBG4, "vo_svga: OSD draw in page %d\n",cpage);
 670     base=PageStore[cpage].vbase + y0*mode_stride + x0*modeinfo->bytesperpixel;
 671     switch (mode_bpp) {
 672         case 32:
 673             vo_draw_alpha_rgb32(w, h, src, srca, stride, base, mode_stride);
 674             break;
 675         case 24:
 676             vo_draw_alpha_rgb24(w, h, src, srca, stride, base, mode_stride);
 677             break;
 678         case 16:
 679             vo_draw_alpha_rgb16(w, h, src, srca, stride, base, mode_stride);
 680             break;
 681         case 15:
 682             vo_draw_alpha_rgb15(w, h, src, srca, stride, base, mode_stride);
 683             break;
 684     }
 685 }
 686
 687 static uint32_t get_image(mp_image_t *mpi){
 688     int page;
 689
 690     if(!IMGFMT_IS_BGR(mpi->imgfmt) && !IMGFMT_IS_RGB(mpi->imgfmt) ){
 691         assert(0);//should never happen
 692         return VO_FALSE;
 693     }
 694
 695     if (
 696         ( (mpi->type != MP_IMGTYPE_STATIC) && (mpi->type != MP_IMGTYPE_TEMP)) ||
 697         (mpi->flags & MP_IMGFLAG_PLANAR) ||
 698         (mpi->flags & MP_IMGFLAG_YUV)
 699        )
 700     return VO_FALSE;
 701
 702 //reading from video memory is horribly slow
 703     if( !(mpi->flags & MP_IMGFLAG_READABLE) && vo_directrendering &&
 704         (mode_capabilities & CAP_LINEAR) ){
 705
 706 //find free page and reserve it
 707         page=page_find_free();
 708         if(page >= 0){
 709             PageStore[page].locks=PAGE_BUSY;
 710
 711             mpi->flags |= MP_IMGFLAG_DIRECT;
 712             mpi->stride[0] = mode_stride;
 713             mpi->planes[0] = PageStore[page].vbase +
 714                              y_pos*mode_stride + (x_pos*mpi->bpp)/8;
 715             mpi->priv=(void *)page;
 716             mp_msg(MSGT_VO,MSGL_DBG3, "vo_svga: direct render allocated! page=%d\n",page);
 717             return VO_TRUE;
 718         }
 719     }
 720
 721     return VO_FALSE;
 722 }