1 #include "src/tesuto.h"
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4 #include <conio.h> // this is where Open Watcom hides the outp() etc. functions
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14 #pragma pack(push,1)
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16 uint8_t vrl_sig[4]; // +0x00 "VRL1"
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17 uint8_t fmt_sig[4]; // +0x04 "VGAX"
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18 uint16_t height; // +0x08 Sprite height
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19 uint16_t width; // +0x0A Sprite width
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20 int16_t hotspot_x; // +0x0C Hotspot offset (X) for programmer's reference
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21 int16_t hotspot_y; // +0x0E Hotspot offset (Y) for programmer's reference
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25 static unsigned char palette[768];
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27 void draw_vrl_modex(unsigned int x,unsigned int y,struct vrl_header *hdr,unsigned char *data,unsigned int datasz) {
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28 unsigned int vram_offset = (y * vga_stride) + (x >> 2);
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29 unsigned char *fence = data + datasz;
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30 unsigned char vga_plane = (x & 3);
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31 unsigned char run,skip,b;
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32 unsigned char far *draw;
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34 while (data < fence) {
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35 /* start of another vertical strip */
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36 draw = vga_graphics_ram + vram_offset;
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37 vga_write_sequencer(0x02/*map mask*/,1 << vga_plane);
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39 while (data < fence) {
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41 if (run == 0xFF) break;
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43 draw += skip * vga_stride;
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46 while (run > 0x80) {
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61 /* end of a vertical strip. next line? */
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62 if ((++vga_plane) == 4) {
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68 vga_write_sequencer(0x02/*map mask*/,0xF);
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71 int main(int argc,char **argv) {
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72 struct vrl_header *vrl_header;
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73 unsigned char *buffer;
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78 fprintf(stderr,"drawvrl <VRL file> <palette file>\n");
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82 fd = open(argv[1],O_RDONLY|O_BINARY);
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84 fprintf(stderr,"Unable to open '%s'\n",argv[1]);
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88 unsigned long sz = lseek(fd,0,SEEK_END);
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89 if (sz < sizeof(vrl_header)) return 1;
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90 if (sz >= 65535UL) return 1;
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92 bufsz = (unsigned int)sz;
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93 buffer = malloc(bufsz);
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94 if (buffer == NULL) return 1;
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96 lseek(fd,0,SEEK_SET);
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97 if ((unsigned int)read(fd,buffer,bufsz) < bufsz) return 1;
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99 vrl_header = (struct vrl_header*)buffer;
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100 if (memcmp(vrl_header->vrl_sig,"VRL1",4) || memcmp(vrl_header->fmt_sig,"VGAX",4)) return 1;
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101 if (vrl_header->width == 0 || vrl_header->height == 0) return 1;
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106 if (!probe_vga()) {
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107 printf("VGA probe failed\n");
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111 update_state_from_vga();
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112 vga_enable_256color_modex(); // VGA mode X
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114 /* load color palette */
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115 fd = open(argv[2],O_RDONLY|O_BINARY);
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119 read(fd,palette,768);
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122 vga_palette_lseek(0);
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123 for (i=0;i < 256;i++) vga_palette_write(palette[(i*3)+0]>>2,palette[(i*3)+1]>>2,palette[(i*3)+2]>>2);
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126 draw_vrl_modex(0,0,vrl_header,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
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127 while (getch() != 13);
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132 for (i=1;i < 320;i++)
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133 draw_vrl_modex(i,0,vrl_header,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
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135 while (getch() != 13);
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140 for (i=1;i < 200;i++)
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141 draw_vrl_modex(i,i,vrl_header,buffer+sizeof(*vrl_header),bufsz-sizeof(*vrl_header));
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143 while (getch() != 13);
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