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