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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include "vbe.h"
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4
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5 #define REALPTR(s, o) (void*)(((uint32_t)(s) << 4) + (uint32_t)(o))
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6 #define VBEPTR(x) REALPTR(((x) & 0xffff0000) >> 16, (x) & 0xffff)
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7 #define VBEPTR_SEG(x) (((x) & 0xffff0000) >> 16)
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8 #define VBEPTR_OFF(x) ((x) & 0xffff)
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9
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10 struct video_mode {
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11 int xres, yres, bpp;
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12 };
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13
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14 void sort_modes(struct video_mode *arr, int sz, int field);
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15 /*int modecmp(const void *pa, const void *pb);*/
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16
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17 int main(int argc, char **argv)
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18 {
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19 int i, nmodes;
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20 struct vbe_info *vbe;
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21 struct vbe_mode_info *mode;
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22 uint16_t *modes;
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23 struct video_mode *vmodes;
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24 char *vendor, *product, *prod_rev;
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25
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26 if(!(vbe = vbe_get_info())) {
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27 fprintf(stderr, "VBE not found\n");
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28 return 1;
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29 }
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30
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31 if(!(vendor = VBEPTR(vbe->oem_vendor_name_ptr)) || !*vendor) {
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32 vendor = "unknown";
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33 }
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34 if(!(product = VBEPTR(vbe->oem_product_name_ptr)) || !*product) {
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35 product = "unknown";
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36 }
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37 if(!(prod_rev = VBEPTR(vbe->oem_product_rev_ptr)) || !*prod_rev) {
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38 prod_rev = "unknown";
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39 }
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40
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41 printf("VBE version: %x.%x\n", vbe->version >> 8, vbe->version & 0xff);
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42 printf("Graphics adapter: %s, %s (%s)\n", vendor, product, prod_rev);
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43 printf("Video memory: %dkb\n", vbe->total_mem << 6);
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44
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45 modes = VBEPTR(vbe->vid_mode_ptr);
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46 nmodes = 0;
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47 for(i=0; i<1024; i++) {
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48 if(modes[i] == 0xffff) break;
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49 nmodes++;
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50 }
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51 printf("%d video modes found:\n", nmodes);
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52
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53 if(!(vmodes = malloc(nmodes * sizeof *vmodes))) {
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54 fprintf(stderr, "failed to allocate video modes array\n");
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55 return 1;
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56 }
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57
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58 for(i=0; i<nmodes; i++) {
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59 if(!(mode = vbe_get_mode_info(modes[i]))) {
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60 fprintf(stderr, "failed to get mode %d info\n", i);
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61 }
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62 vmodes[i].xres = mode->xres;
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63 vmodes[i].yres = mode->yres;
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64 vmodes[i].bpp = mode->bpp;
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65 }
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66
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67 /*qsort(vmodes, nmodes, sizeof *vmodes, modecmp);*/
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68 sort_modes(vmodes, nmodes, 2);
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69 sort_modes(vmodes, nmodes, 1);
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70
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71 for(i=0; i<nmodes; i++) {
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72 if(i == 0 || vmodes[i].xres != vmodes[i - 1].xres ||
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73 vmodes[i].yres != vmodes[i - 1].yres) {
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74 printf("\n%4dx%d - depth:", vmodes[i].xres, vmodes[i].yres);
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75 }
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76 printf(" %d", vmodes[i].bpp);
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77 }
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78 putchar('\n');
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79
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80 free(vmodes);
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81 return 0;
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82 }
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83 /*
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84 int modecmp(const void *pa, const void *pb)
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85 {
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86 const struct video_mode *va = pa;
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87 const struct video_mode *vb = pb;
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88
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89 return va->xres * va->yres < vb->xres * vb->yres;
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90 }
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91 */
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92
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93 void sort_modes(struct video_mode *arr, int sz, int field)
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94 {
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95 int i, j;
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96 struct video_mode tmp;
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97
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98 for(i=0; i<sz; i++) {
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99 for(j=i+1; j<sz; j++) {
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100 if(((int*)(arr + i))[field] >= ((int*)(arr + j))[field]) {
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101 tmp = arr[i];
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102 arr[i] = arr[j];
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103 arr[j] = tmp;
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104 }
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105 }
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106 }
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107 }
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