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 player_t player[1];
  14
  15 int main(int argc,char **argv) {
  16         struct vrl1_vgax_header *vrl_header;
  17         vrl1_vgax_offset_t *vrl_lineoffs;
  18         unsigned char *buffer;
  19         unsigned int bufsz;
  20         int fd;
  21         char *bakapee1,*bakapee2;
  22
  23         bakapee1=malloc(64);
  24         bakapee2=malloc(1024);
  25
  26         IN_Startup();
  27         IN_Default(0,&player,ctrl_Joystick);
  28         IN_initplayer(&player, 0);
  29
  30         if (argc < 3) {
  31                 fprintf(stderr,"drawvrl <VRL file> <palette file>\n");
  32                 bakapee1 = FILENAME_1;//"data/aconita.vrl";
  33                 bakapee2 = FILENAME_2;//"data/aconita.pal";
  34                 //return 1;
  35         }else{
  36                 if(argv[1]) bakapee1 = argv[1];
  37                 if(argv[2]) bakapee2 = argv[2];
  38         }
  39
  40         fd = open(bakapee1,O_RDONLY|O_BINARY);
  41         if (fd < 0) {
  42                 fprintf(stderr,"Unable to open '%s'\n", bakapee1);
  43                 return 1;
  44         }
  45         {
  46                 unsigned long sz = lseek(fd,0,SEEK_END);
  47                 if (sz < sizeof(*vrl_header)) return 1;
  48                 if (sz >= 65535UL) return 1;
  49
  50                 bufsz = (unsigned int)sz;
  51                 buffer = malloc(bufsz);
  52                 if (buffer == NULL) return 1;
  53
  54                 lseek(fd,0,SEEK_SET);
  55                 if ((unsigned int)read(fd,buffer,bufsz) < bufsz) return 1;
  56
  57                 vrl_header = (struct vrl1_vgax_header*)buffer;
  58                 if (memcmp(vrl_header->vrl_sig,"VRL1",4) || memcmp(vrl_header->fmt_sig,"VGAX",4)) return 1;
  59                 if (vrl_header->width == 0 || vrl_header->height == 0) return 1;
  60         }
  61         close(fd);
  62
  63         probe_dos();
  64         if (!probe_vga()) {
  65                 printf("VGA probe failed\n");
  66                 return 1;
  67         }
  68         VGAmodeX(1, 1, &gvar);
  69
  70         /* load color palette */
  71         fd = open(bakapee2,O_RDONLY|O_BINARY);
  72         if (fd >= 0) {
  73                 unsigned int i;
  74
  75                 read(fd,palette,768);
  76                 close(fd);
  77
  78                 vga_palette_lseek(0);
  79                 for (i=0;i < 256;i++) vga_palette_write(palette[(i*3)+0]>>2,palette[(i*3)+1]>>2,palette[(i*3)+2]>>2);
  80         }
  81
  82         /* preprocess the sprite to generate line offsets */
  83         vrl_lineoffs = vrl1_vgax_genlineoffsets(vrl_header,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
  84         if (vrl_lineoffs == NULL) return 1;
  85
  86         /* setup camera and screen~ */
  87         modexHiganbanaPageSetup(&gvar.video);
  88         gvar.video.page[1].dx=gvar.video.page[0].dx=16;
  89         gvar.video.page[1].dy=gvar.video.page[0].dy=16;
  90         modexShowPage(&(gvar.video.page[0]));
  91
  92         #define VMEMHEIGHT gvar.video.page[0].height+gvar.video.page[1].height
  93
  94         //4     this dose the screen
  95         {
  96                 unsigned int i,j,o;
  97                 /* fill screen with a distinctive pattern */
  98                 for (i=0;i < gvar.video.page[0].width;i++) {
  99                         o = i >> 2;
 100                         vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
 101                         for (j=0;j < VMEMHEIGHT;j++,o += gvar.video.page[0].stridew)
 102                                 vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
 103                 }
 104         }
 105
 106         //while (getch() != 13);
 107
 108         /* make distinctive pattern offscreen, render sprite, copy onscreen.
 109          * this time, we render the distinctive pattern to another offscreen location and just copy.
 110          * note this version is much faster too! */
 111         {
 112                 unsigned int i,j,o,o2;
 113                 int x,y,rx,ry,w,h;
 114                 unsigned int overdraw = 1;      // how many pixels to "overdraw" so that moving sprites with edge pixels don't leave streaks.
 115                                                 // if the sprite's edge pixels are clear anyway, you can set this to 0.
 116                 VGA_RAM_PTR omemptr;
 117                 int xdir=1,ydir=1;
 118
 119                 //4     this dose the sprite? wwww
 120                 /* fill pattern offset with a distinctive pattern */
 121                 for (i=0;i < gvar.video.page[0].width;i++) {
 122                         o = (i >> 2) + (0x10000UL - (uint16_t)gvar.video.page[1].data);
 123                         vga_write_sequencer(0x02/*map mask*/,1 << (i&3));
 124                         for (j=0;j < VMEMHEIGHT;j++,o += gvar.video.page[0].stridew)
 125                                 vga_state.vga_graphics_ram[o] = (i^j)&15; // VRL samples put all colors in first 15!
 126                 }
 127
 128                 /* starting coords. note: this technique is limited to x coordinates of multiple of 4 */
 129                 x = 0;
 130                 y = 0;
 131
 132                 /* do it */
 133                 omemptr = vga_state.vga_graphics_ram; // save original mem ptr
 134
 135                 while(!IN_KeyDown(sc_Escape))
 136                 {
 137                         IN_ReadControl(0,&player);
 138                         if(IN_KeyDown(2)) modexShowPage(&(gvar.video.page[0]));
 139                         if(IN_KeyDown(3)) modexShowPage(&(gvar.video.page[1]));
 140                         if(IN_KeyDown(68))      //f10
 141                         {
 142                                 //gvar.kurokku.fpscap=!gvar.kurokku.fpscap;
 143                                 IN_UserInput(1,1);
 144                         }
 145
 146                         /* render box bounds. y does not need modification, but x and width must be multiple of 4 */
 147                         if (x >= overdraw) rx = (x - overdraw) & (~3);
 148                         else rx = -(gvar.video.page[0].dx);
 149                         if (y >= overdraw) ry = (y - overdraw);
 150                         else ry = -(gvar.video.page[0].dy);
 151                         h = vrl_header->height + overdraw + y - ry;
 152                         w = (x + vrl_header->width + (overdraw*2) + 3/*round up*/ - rx) & (~3);
 153                         if ((rx+w) > gvar.video.page[0].width) w = gvar.video.page[0].width-rx;
 154                         if ((ry+h) > gvar.video.page[0].height) h = (gvar.video.page[0].height)-ry;
 155
 156                         /* block copy pattern to where we will draw the sprite */
 157                         vga_setup_wm1_block_copy();
 158                         o2 = gvar.video.page[0].pagesize;
 159                         o = (0x10000UL - (uint16_t)gvar.video.page[1].data) + (ry * gvar.video.page[0].stridew) + (rx >> 2); // source offscreen
 160                         for (i=0;i < h;i++,o += gvar.video.page[0].stridew,o2 += (w >> 2)) vga_wm1_mem_block_copy(o2,o,w >> 2);
 161                         /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
 162                         vga_restore_rm0wm0();
 163
 164                         /* replace VGA stride with our own and mem ptr. then sprite rendering at this stage is just (0,0) */
 165                         vga_state.vga_draw_stride_limit = (gvar.video.page[0].width + 3/*round up*/ - x) >> 2;
 166                         vga_state.vga_draw_stride = w >> 2;
 167                         vga_state.vga_graphics_ram = omemptr + gvar.video.page[0].pagesize;
 168
 169                         /* then the sprite. note modding ram ptr means we just draw to (x&3,0) */
 170                         draw_vrl1_vgax_modex(x-rx,y-ry,vrl_header,vrl_lineoffs,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
 171
 172                         /* restore ptr */
 173                         vga_state.vga_graphics_ram = omemptr;
 174
 175                         /* block copy to visible RAM from offscreen */
 176                         vga_setup_wm1_block_copy();
 177                         o = gvar.video.page[0].pagesize; // source offscreen
 178                         o2 = (ry * gvar.video.page[0].stridew) + (rx >> 2); // dest visible (original stride)
 179                         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);
 180                         /* must restore Write Mode 0/Read Mode 0 for this code to continue drawing normally */
 181                         vga_restore_rm0wm0();
 182
 183                         /* restore stride */
 184                         vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = gvar.video.page[0].stridew;
 185
 186                         /* step */
 187                         x += xdir; y += ydir;
 188                         if ((x + vrl_header->width) >= ((gvar.video.page[0].width + gvar.video.page[0].dx) - 1) || x == -(gvar.video.page[0].dx))
 189                                 xdir = -xdir;
 190                         if ((y + vrl_header->height) >= ((gvar.video.page[0].height + gvar.video.page[0].dy) - 1) || y == -(gvar.video.page[0].dy))
 191                                 ydir = -ydir;
 192                         //printf("[x%u y%u]     [rx%u ry%u]             [w%u h%u]\n", x, y, rx, ry, w, h);
 193                 }
 194         }
 195
 196         IN_UserInput(1,1);
 197
 198         while(!IN_KeyDown(sc_Escape))
 199         {
 200                 if(IN_KeyDown(2)) modexShowPage(&(gvar.video.page[0]));
 201                 if(IN_KeyDown(3)) modexShowPage(&(gvar.video.page[1]));
 202         }
 203
 204         modexShowPage(&(gvar.video.page[0]));
 205         /* another handy "demo" effect using VGA write mode 1.
 206          * we can take what's on screen and vertically squash it like an old analog TV set turning off. */
 207         {
 208                 unsigned int blank_line_ofs = (gvar.video.page[0].stridew * gvar.video.page[0].height * 2);
 209                 unsigned int copy_ofs = (gvar.video.page[0].stridew * gvar.video.page[0].height);
 210                 unsigned int display_ofs = 0x0000;
 211                 unsigned int i,y,soh,doh,dstart;
 212                 unsigned int dh_blankfill = 8;
 213                 unsigned int dh_step = 8;
 214                 uint32_t sh,dh,yf,ystep;
 215
 216                 /* copy active display (0) to offscreen buffer (0x4000) */
 217                 vga_state.vga_draw_stride_limit = vga_state.vga_draw_stride = gvar.video.page[0].stridew;
 218                 vga_setup_wm1_block_copy();
 219                 vga_wm1_mem_block_copy(copy_ofs,display_ofs,gvar.video.page[0].stridew * gvar.video.page[0].height);
 220                 vga_restore_rm0wm0();
 221
 222                 /* need a blank line as well */
 223                 for (i=0;i < gvar.video.page[0].stridew;i++) vga_state.vga_graphics_ram[i+blank_line_ofs] = 0;
 224
 225                 sh = dh = gvar.video.page[0].height;
 226                 while (dh >= dh_step) {
 227                         /* stop animating if the user hits ENTER */
 228                         if (kbhit()) {
 229                                 if (getch() == 13) break;
 230                         }
 231
 232                         /* wait for vsync end */
 233                         vga_wait_for_vsync_end();
 234
 235                         /* what scalefactor to use for stretching? */
 236                         ystep = (0x10000UL * sh) / dh;
 237                         dstart = (gvar.video.page[0].height - dh) / 2; // center the squash effect on screen, otherwise it would squash to top of screen
 238                         doh = display_ofs;
 239                         soh = copy_ofs;
 240                         yf = 0;
 241                         y = 0;
 242
 243                         /* for performance, keep VGA in write mode 1 the entire render */
 244                         vga_setup_wm1_block_copy();
 245
 246                         /* blank lines */
 247                         if (dstart >= dh_blankfill) y = dstart - dh_blankfill;
 248                         else y = 0;
 249                         doh = gvar.video.page[0].stridew * y;
 250
 251                         while (y < dstart) {
 252                                 vga_wm1_mem_block_copy(doh,blank_line_ofs,gvar.video.page[0].stridew);
 253                                 doh += gvar.video.page[0].stridew;
 254                                 y++;
 255                         }
 256
 257                         /* draw */
 258                         while (y < (dh+dstart)) {
 259                                 soh = copy_ofs + ((yf >> 16UL) * gvar.video.page[0].stridew);
 260                                 vga_wm1_mem_block_copy(doh,soh,gvar.video.page[0].stridew);
 261                                 doh += gvar.video.page[0].stridew;
 262                                 yf += ystep;
 263                                 y++;
 264                         }
 265
 266                         /* blank lines */
 267                         while (y < gvar.video.page[0].height && y < (dh+dstart+dh_blankfill)) {
 268                                 vga_wm1_mem_block_copy(doh,blank_line_ofs,gvar.video.page[0].stridew);
 269                                 doh += gvar.video.page[0].stridew;
 270                                 y++;
 271                         }
 272
 273                         /* done */
 274                         vga_restore_rm0wm0();
 275
 276                         /* wait for vsync */
 277                         vga_wait_for_vsync();
 278
 279                         /* make it shrink */
 280                         dh -= dh_step;
 281                         if (dh < 40) dh_step = 1;
 282                 }
 283         }
 284
 285         IN_Shutdown();
 286         VGAmodeX(0, 1, &gvar);
 287         free(vrl_lineoffs);
 288         buffer = NULL;
 289         free(buffer);
 290         bufsz = 0;
 291         free(bakapee1);
 292         free(bakapee2);
 293         return 0;
 294 }