doslib probe DOS, CPU, and VGA. exit politely if not VGA.

[16.git] / src / bakapi.c

diff --git a/src/bakapi.c b/src/bakapi.c
index 16a0c77f07b49f2f79ca54072774cad219f70ddd..9a5412c752b1935703a8f8008d0be51e51e08e6f 100755 (executable)
--- a/src/bakapi.c
+++ b/src/bakapi.c
@@ -1,5 +1,5 @@
 /* Project 16 Source Code~
- * Copyright (C) 2012-2015 sparky4 & pngwen & andrius4669
+ * Copyright (C) 2012-2016 sparky4 & pngwen & andrius4669 & joncampbell123
  *
  * This file is part of Project 16.
  *
@@ -33,6 +33,27 @@ int ch=0x0;
 void
 main(int argc, char *argvar[])
 {
+       // DOSLIB: check our environment
+       probe_dos();
+
+       // DOSLIB: what CPU are we using?
+       // NTS: I can see from the makefile Sparky4 intends this to run on 8088 by the -0 switch in CFLAGS.
+       //      So this code by itself shouldn't care too much what CPU it's running on. Except that other
+       //      parts of this project (DOSLIB itself) rely on CPU detection to know what is appropriate for
+       //      the CPU to carry out tasks. --J.C.
+       cpu_probe();
+
+       // DOSLIB: check for VGA
+       if (!probe_vga()) {
+               printf("VGA probe failed\n");
+               return;
+       }
+       // hardware must be VGA or higher!
+       if (!(vga_state.vga_flags & VGA_IS_VGA)) {
+               printf("This program requires VGA or higher graphics hardware\n");
+               return;
+       }
+
        // main variables values
        d=4; // switch variable
        key=2; // default screensaver number
@@ -44,7 +65,30 @@ main(int argc, char *argvar[])
 #ifdef MXLIB
        VGAmodeX(1, &gvar);
 #else
-       mxSetMode(3);
+       int10_setmode(19);
+       update_state_from_vga();
+       vga_enable_256color_modex(); // VGA mode X
+       vga_state.vga_width = 320; // VGA lib currently does not update this
+       vga_state.vga_height = 240; // VGA lib currently does not update this
+
+//#if 1 // 320x240 test mode: this is how Project 16 is using our code, enable for test case
+       {
+               struct vga_mode_params cm;
+
+               vga_read_crtc_mode(&cm);
+
+               // 320x240 mode 60Hz
+               cm.vertical_total = 525;
+               cm.vertical_start_retrace = 0x1EA;
+               cm.vertical_end_retrace = 0x1EC;
+               cm.vertical_display_end = 480;
+               cm.vertical_blank_start = 489;
+               cm.vertical_blank_end = 517;
+
+               vga_write_crtc_mode(&cm,0);
+       }
+       vga_state.vga_height = 240; // VGA lib currently does not update this
+//#endif
 #endif
        bakapee.xx = rand()&0%gvar.video.page[0].width;
        bakapee.yy = rand()&0%gvar.video.page[0].height;
@@ -54,6 +98,7 @@ main(int argc, char *argvar[])
        bakapee.bakax=0;
        bakapee.bakay=0;
        bakapee.coor=0;
+       bakapee.tile=0;
 
        /* setup camera and screen~ */
        gvar.video.page[0] = modexDefaultPage(&gvar.video.page[0]);
@@ -77,27 +122,76 @@ main(int argc, char *argvar[])
                }
                else
                {
-                       #ifndef MXLIB
-                       mxChangeMode(0);
+#ifndef MXLIB
+                       int10_setmode(3);
 #else
                        VGAmodeX(0, &gvar);
 #endif
-                       //modexLeave();
                        // user imput switch
-                       fprintf(stderr, "xx=%d  yy=%d\n", bakapee.xx, bakapee.yy);
+                       fprintf(stderr, "xx=%d  yy=%d   tile=%d\n", bakapee.xx, bakapee.yy, bakapee.tile);
                        printf("Enter 1, 2, 3, 4, or 6 to run a screensaver, or enter 0 to quit.\n", getch());  // prompt the user
-                       scanf("%d", &key);
+                       //scanf("%d", &key);
+                       if(scanf("%d", &key) != 1)
+                       {
+                               printf("%d\n", key);
+                       }
+                       getch();
                        //if(key==3){xx=yy=0;} // crazy screen saver wwww
-                       if(key==0){ d=0; }else{
-                               gvar.video.page[0] = modexDefaultPage(&gvar.video.page[0]);
-                               gvar.video.page[0].width += (TILEWH*2);
-                               gvar.video.page[0].height += (TILEWH*2);
+                       switch (key)
+                       {
+                               case 0:
+                                       d=0;
+                               break;
+                               case 65536:
+                                       switch (bakapee.tile)
+                                       {
+                                               case 0:
+                                                       bakapee.tile=1;
+                                               break;
+                                               case 1:
+                                                       bakapee.tile=0;
+                                               break;
+                                       }
+                                       d=2;
+                               default:
 #ifdef MXLIB
-                               VGAmodeX(1, &gvar);
+                                       gvar.video.page[0] = modexDefaultPage(&gvar.video.page[0]);
+                                       gvar.video.page[0].width += (TILEWH*2);
+                                       gvar.video.page[0].height += (TILEWH*2);
+                                       VGAmodeX(1, &gvar);
 #else
-                               mxChangeMode(3);
+                                               probe_dos();
+       if (!probe_vga()) {
+               printf("VGA probe failed\n");
+               return 1;
+       }
+       int10_setmode(19);
+       update_state_from_vga();
+       vga_enable_256color_modex(); // VGA mode X
+       vga_state.vga_width = 320; // VGA lib currently does not update this
+       vga_state.vga_height = 240; // VGA lib currently does not update this
+
+//#if 1 // 320x240 test mode: this is how Project 16 is using our code, enable for test case
+       {
+               struct vga_mode_params cm;
+
+               vga_read_crtc_mode(&cm);
+
+               // 320x240 mode 60Hz
+               cm.vertical_total = 525;
+               cm.vertical_start_retrace = 0x1EA;
+               cm.vertical_end_retrace = 0x1EC;
+               cm.vertical_display_end = 480;
+               cm.vertical_blank_start = 489;
+               cm.vertical_blank_end = 517;
+
+               vga_write_crtc_mode(&cm,0);
+       }
+       vga_state.vga_height = 240; // VGA lib currently does not update this
+//#endif
 #endif
-                               modexShowPage(&gvar.video.page[0]);
+                                       modexShowPage(&gvar.video.page[0]);
+                               break;
                        }
                }
        }