src/tesuto0.c

   1 #include <hw/cpu/cpu.h>
   2 #include <hw/dos/dos.h>
   3 #include <hw/vga/vga.h>
   4 #include <hw/vga/vrl.h>
   5
   6 #include "src/tesuto.h"
   7
   8 #define FILENAME_1 "data/aconita.vrl"
   9 #define FILENAME_2 "data/aconita.pal"
  10
  11 static unsigned char palette[768];
  12
  13 int main(int argc,char **argv) {
  14         struct vrl1_vgax_header *vrl_header;
  15         vrl1_vgax_offset_t *vrl_lineoffs;
  16         unsigned char *buffer;
  17         unsigned int bufsz;
  18         int fd;
  19         char *bakapee1,*bakapee2;
  20
  21         bakapee1=malloc(64);
  22         bakapee2=malloc(1024);
  23
  24         if (argc < 3) {
  25                 fprintf(stderr,"drawvrl <VRL file> <palette file>\n");
  26                 bakapee1 = FILENAME_1;//"data/aconita.vrl";
  27                 bakapee2 = FILENAME_2;//"data/aconita.pal";
  28                 //return 1;
  29         }else{
  30                 if(argv[1]) bakapee1 = argv[1];
  31                 if(argv[2]) bakapee2 = argv[2];
  32         }
  33         printf("1=%s    2=%s\n", bakapee1, bakapee2);
  34         while (getch() != 13);
  35
  36         fd = open(bakapee1,O_RDONLY|O_BINARY);
  37         if (fd < 0) {
  38                 fprintf(stderr,"Unable to open '%s'\n", bakapee1);
  39                 return 1;
  40         }
  41         {
  42                 unsigned long sz = lseek(fd,0,SEEK_END);
  43                 if (sz < sizeof(*vrl_header)) return 1;
  44                 if (sz >= 65535UL) return 1;
  45
  46                 bufsz = (unsigned int)sz;
  47                 buffer = malloc(bufsz);
  48                 if (buffer == NULL) return 1;
  49
  50                 lseek(fd,0,SEEK_SET);
  51                 if ((unsigned int)read(fd,buffer,bufsz) < bufsz) return 1;
  52
  53                 vrl_header = (struct vrl1_vgax_header*)buffer;
  54                 if (memcmp(vrl_header->vrl_sig,"VRL1",4) || memcmp(vrl_header->fmt_sig,"VGAX",4)) return 1;
  55                 if (vrl_header->width == 0 || vrl_header->height == 0) return 1;
  56         }
  57         close(fd);
  58
  59         probe_dos();
  60         if (!probe_vga()) {
  61                 printf("VGA probe failed\n");
  62                 return 1;
  63         }
  64         int10_setmode(19);
  65         update_state_from_vga();
  66         vga_enable_256color_modex(); // VGA mode X
  67         vga_state.vga_width = 320; // VGA lib currently does not update this
  68         vga_state.vga_height = 240; // VGA lib currently does not update this
  69
  70 #if 1 // 320x240 test mode: this is how Project 16 is using our code, enable for test case
  71         {
  72                 struct vga_mode_params cm;
  73
  74                 vga_read_crtc_mode(&cm);
  75
  76                 // 320x240 mode 60Hz
  77                 cm.vertical_total = 525;
  78                 cm.vertical_start_retrace = 0x1EA;
  79                 cm.vertical_end_retrace = 0x1EC;
  80                 cm.vertical_display_end = 480;
  81                 cm.vertical_blank_start = 489;
  82                 cm.vertical_blank_end = 517;
  83
  84                 vga_write_crtc_mode(&cm,0);
  85         }
  86         vga_state.vga_height = 240; // VGA lib currently does not update this
  87 #endif
  88
  89         /* load color palette */
  90         fd = open(bakapee2,O_RDONLY|O_BINARY);
  91         if (fd >= 0) {
  92                 unsigned int i;
  93
  94                 read(fd,palette,768);
  95                 close(fd);
  96
  97                 vga_palette_lseek(0);
  98                 for (i=0;i < 256;i++) vga_palette_write(palette[(i*3)+0]>>2,palette[(i*3)+1]>>2,palette[(i*3)+2]>>2);
  99         }
 100
 101         /* preprocess the sprite to generate line offsets */
 102         vrl_lineoffs = vrl1_vgax_genlineoffsets(vrl_header,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
 103         if (vrl_lineoffs == NULL) return 1;
 104
 105         {
 106                 unsigned int i,j,o;
 107
 108                 /* fill screen with a distinctive pattern */
 109                 for (i=0;i < vga_state.vga_width;i++) {
 110                         o = i >> 2;
 111                         vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
 112                         for (j=0;j < vga_state.vga_height;j++,o += vga_state.vga_stride)
 113                                 vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
 114                 }
 115         }
 116         //while (getch() != 13);
 117
 118 //      /* make distinctive pattern offscreen, render sprite, copy onscreen */
 119 //      {
 120 //              const unsigned int offscreen_ofs = (vga_state.vga_stride * vga_state.vga_height);
 121 //              unsigned int i,j,o,o2,x,y,rx,ry,w,h;
 122 //              unsigned int overdraw = 1;      // how many pixels to "overdraw" so that moving sprites with edge pixels don't leave streaks.
 123 //                                              // if the sprite's edge pixels are clear anyway, you can set this to 0.
 124 //              VGA_RAM_PTR omemptr;
 125 //              int xdir=1,ydir=1;
 126 //
 127 //              /* starting coords. note: this technique is limited to x coordinates of multiple of 4 */
 128 //              x = 0;
 129 //              y = 0;
 130 //
 131 //              /* do it */
 132 //              omemptr = vga_state.vga_graphics_ram; // save original mem ptr
 133 //              while (1) {
 134 //                      /* stop animating if the user hits ENTER */
 135 //                      if (kbhit()) {
 136 //                              if (getch() == 13) break;
 137 //                      }
 138 //
 139 //                      /* render box bounds. y does not need modification, but x and width must be multiple of 4 */
 140 //                      if (x >= overdraw) rx = (x - overdraw) & (~3);
 141 //                      else rx = 0;
 142 //                      if (y >= overdraw) ry = (y - overdraw);
 143 //                      else ry = 0;
 144 //                      h = vrl_header->height + overdraw + y - ry;
 145 //                      w = (x + vrl_header->width + (overdraw*2) + 3/*round up*/ - rx) & (~3);
 146 //                      if ((rx+w) > vga_state.vga_width) w = vga_state.vga_width-rx;
 147 //                      if ((ry+h) > vga_state.vga_height) h = vga_state.vga_height-ry;
 148 //
 149 //                      /* replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0) */
 150 //                      vga_state.vga_draw_stride_limit = (vga_state.vga_width + 3/*round up*/ - x) >> 2;
 151 //                      vga_state.vga_draw_stride = w >> 2;
 152 //                      vga_state.vga_graphics_ram = omemptr + offscreen_ofs;
 153 //
 154 //                      /* first draw pattern corresponding to that part of the screen. this COULD be optimized, obviously, but it's designed for study.
 155 //                       * also note we don't have to use the same stride as the display! */
 156 //                      for (i=rx;i < (rx+w);i++) {
 157 //                              o = (i-rx) >> 2;
 158 //                              vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
 159 //                              for (j=ry;j < (ry+h);j++,o += vga_state.vga_draw_stride)
 160 //                                      vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
 161 //                      }
 162 //
 163 //                      /* then the sprite. note modding ram ptr means we just draw to (x&3,0) */
 164 //                      draw_vrl1_vgax_modex(x-rx,y-ry,vrl_header,vrl_lineoffs,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
 165 //
 166 //                      /* restore ptr */
 167 //                      vga_state.vga_graphics_ram = omemptr;
 168 //
 169 //                      /* block copy to visible RAM from offscreen */
 170 //                      vga_setup_wm1_block_copy();
 171 //                      o = offscreen_ofs; // source offscreen
 172 //                      o2 = (ry * vga_state.vga_stride) + (rx >> 2); // dest visible (original stride)
 173 //                      for (i=0;i < h;i++,o += vga_state.vga_draw_stride,o2 += vga_state.vga_stride) vga_wm1_mem_block_copy(o2,o,w >> 2);
 174 //                      /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
 175 //                      vga_restore_rm0wm0();
 176 //
 177 //                      /* restore stride */
 178 //                      vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = vga_state.vga_stride;
 179 //
 180 //                      /* step */
 181 //                      x += xdir;
 182 //                      y += ydir;
 183 //                      if (x >= (vga_state.vga_width - 1) || x == 0)
 184 //                              xdir = -xdir;
 185 //                      if (y >= (vga_state.vga_height - 1) || y == 0)
 186 //                              ydir = -ydir;
 187 //              }
 188 //      }
 189
 190         /* make distinctive pattern offscreen, render sprite, copy onscreen.
 191          * this time, we render the distinctive pattern to another offscreen location and just copy.
 192          * note this version is much faster too! */
 193         {
 194                 const unsigned int offscreen_ofs = (vga_state.vga_stride * vga_state.vga_height);
 195                 const unsigned int pattern_ofs = 0x10000UL - (vga_state.vga_stride * vga_state.vga_height);
 196                 unsigned int i,j,o,o2,x,y,rx,ry,w,h;
 197                 unsigned int overdraw = 1;      // how many pixels to "overdraw" so that moving sprites with edge pixels don't leave streaks.
 198                                                 // if the sprite's edge pixels are clear anyway, you can set this to 0.
 199                 VGA_RAM_PTR omemptr;
 200                 int xdir=1,ydir=1;
 201
 202                 /* fill pattern offset with a distinctive pattern */
 203                 for (i=0;i < vga_state.vga_width;i++) {
 204                         o = (i >> 2) + pattern_ofs;
 205                         vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
 206                         for (j=0;j < vga_state.vga_height;j++,o += vga_state.vga_stride)
 207                                 vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
 208                 }
 209
 210                 /* starting coords. note: this technique is limited to x coordinates of multiple of 4 */
 211                 x = 0;
 212                 y = 0;
 213
 214                 /* do it */
 215                 omemptr = vga_state.vga_graphics_ram; // save original mem ptr
 216                 while (1) {
 217                         /* stop animating if the user hits ENTER */
 218                         if (kbhit()) {
 219                                 if (getch() == 13) break;
 220                         }
 221
 222                         /* render box bounds. y does not need modification, but x and width must be multiple of 4 */
 223                         if (x >= overdraw) rx = (x - overdraw) & (~3);
 224                         else rx = 0;
 225                         if (y >= overdraw) ry = (y - overdraw);
 226                         else ry = 0;
 227                         h = vrl_header->height + overdraw + y - ry;
 228                         w = (x + vrl_header->width + (overdraw*2) + 3/*round up*/ - rx) & (~3);
 229                         if ((rx+w) > vga_state.vga_width) w = vga_state.vga_width-rx;
 230                         if ((ry+h) > vga_state.vga_height) h = vga_state.vga_height-ry;
 231
 232                         /* block copy pattern to where we will draw the sprite */
 233                         vga_setup_wm1_block_copy();
 234                         o2 = offscreen_ofs;
 235                         o = pattern_ofs + (ry * vga_state.vga_stride) + (rx >> 2); // source offscreen
 236                         for (i=0;i < h;i++,o += vga_state.vga_stride,o2 += (w >> 2)) vga_wm1_mem_block_copy(o2,o,w >> 2);
 237                         /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
 238                         vga_restore_rm0wm0();
 239
 240                         /* replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0) */
 241                         vga_state.vga_draw_stride_limit = (vga_state.vga_width + 3/*round up*/ - x) >> 2;
 242                         vga_state.vga_draw_stride = w >> 2;
 243                         vga_state.vga_graphics_ram = omemptr + offscreen_ofs;
 244
 245                         /* then the sprite. note modding ram ptr means we just draw to (x&3,0) */
 246                         draw_vrl1_vgax_modex(x-rx,y-ry,vrl_header,vrl_lineoffs,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
 247
 248                         /* restore ptr */
 249                         vga_state.vga_graphics_ram = omemptr;
 250
 251                         /* block copy to visible RAM from offscreen */
 252                         vga_setup_wm1_block_copy();
 253                         o = offscreen_ofs; // source offscreen
 254                         o2 = (ry * vga_state.vga_stride) + (rx >> 2); // dest visible (original stride)
 255                         for (i=0;i < h;i++,o += vga_state.vga_draw_stride,o2 += vga_state.vga_stride) vga_wm1_mem_block_copy(o2,o,w >> 2);
 256                         /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
 257                         vga_restore_rm0wm0();
 258
 259                         /* restore stride */
 260                         vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = vga_state.vga_stride;
 261
 262                         /* step */
 263                         x += xdir;
 264                         y += ydir;
 265                         if (x >= (vga_state.vga_width - 1) || x == 0)
 266                                 xdir = -xdir;
 267                         if (y >= (vga_state.vga_height - 1) || y == 0)
 268                                 ydir = -ydir;
 269                 }
 270         }
 271
 272         /* another handy "demo" effect using VGA write mode 1.
 273          * we can take what's on screen and vertically squash it like an old analog TV set turning off. */
 274         {
 275                 unsigned int blank_line_ofs = (vga_state.vga_stride * vga_state.vga_height * 2);
 276                 unsigned int copy_ofs = (vga_state.vga_stride * vga_state.vga_height);
 277                 unsigned int display_ofs = 0x0000;
 278                 unsigned int i,y,soh,doh,dstart;
 279                 unsigned int dh_blankfill = 8;
 280                 unsigned int dh_step = 8;
 281                 uint32_t sh,dh,yf,ystep;
 282
 283                 /* copy active display (0) to offscreen buffer (0x4000) */
 284                 vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = vga_state.vga_stride;
 285                 vga_setup_wm1_block_copy();
 286                 vga_wm1_mem_block_copy(copy_ofs,display_ofs,vga_state.vga_stride * vga_state.vga_height);
 287                 vga_restore_rm0wm0();
 288
 289                 /* need a blank line as well */
 290                 for (i=0;i < vga_state.vga_stride;i++) vga_state.vga_graphics_ram[i+blank_line_ofs] = 0;
 291
 292                 sh = dh = vga_state.vga_height;
 293                 while (dh >= dh_step) {
 294                         /* stop animating if the user hits ENTER */
 295                         if (kbhit()) {
 296                                 if (getch() == 13) break;
 297                         }
 298
 299                         /* wait for vsync end */
 300                         vga_wait_for_vsync_end();
 301
 302                         /* what scalefactor to use for stretching? */
 303                         ystep = (0x10000UL * sh) / dh;
 304                         dstart = (vga_state.vga_height - dh) / 2; // center the squash effect on screen, otherwise it would squash to top of screen
 305                         doh = display_ofs;
 306                         soh = copy_ofs;
 307                         yf = 0;
 308                         y = 0;
 309
 310                         /* for performance, keep VGA in write mode 1 the entire render */
 311                         vga_setup_wm1_block_copy();
 312
 313                         /* blank lines */
 314                         if (dstart >= dh_blankfill) y = dstart - dh_blankfill;
 315                         else y = 0;
 316                         doh = vga_state.vga_stride * y;
 317
 318                         while (y < dstart) {
 319                                 vga_wm1_mem_block_copy(doh,blank_line_ofs,vga_state.vga_stride);
 320                                 doh += vga_state.vga_stride;
 321                                 y++;
 322                         }
 323
 324                         /* draw */
 325                         while (y < (dh+dstart)) {
 326                                 soh = copy_ofs + ((yf >> 16UL) * vga_state.vga_stride);
 327                                 vga_wm1_mem_block_copy(doh,soh,vga_state.vga_stride);
 328                                 doh += vga_state.vga_stride;
 329                                 yf += ystep;
 330                                 y++;
 331                         }
 332
 333                         /* blank lines */
 334                         while (y < vga_state.vga_height && y < (dh+dstart+dh_blankfill)) {
 335                                 vga_wm1_mem_block_copy(doh,blank_line_ofs,vga_state.vga_stride);
 336                                 doh += vga_state.vga_stride;
 337                                 y++;
 338                         }
 339
 340                         /* done */
 341                         vga_restore_rm0wm0();
 342
 343                         /* wait for vsync */
 344                         vga_wait_for_vsync();
 345
 346                         /* make it shrink */
 347                         dh -= dh_step;
 348                         if (dh < 40) dh_step = 1;
 349                 }
 350         }
 351
 352         int10_setmode(3);
 353         free(vrl_lineoffs);
 354         buffer = NULL;
 355         free(buffer);
 356         bufsz = 0;
 357         return 0;
 358 }