Revision 99
complete restructure
| lab5.c | ||
|---|---|---|
| 35 | 35 |
} |
| 36 | 36 |
|
| 37 | 37 |
int(video_test_init)(uint16_t mode, uint8_t delay) {
|
| 38 |
int r; |
|
| 39 |
if ((r = get_permissions_first_mbyte())) |
|
| 40 |
panic("%s: sys_privctl (ADD MEM) failed: %d\n", __func__, r);
|
|
| 38 | 41 |
|
| 39 |
set_graphics_mode(mode); |
|
| 42 |
if (set_graphics_mode(mode)) {
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|
| 43 |
printf("%s: failed to set graphic mode %x.\n", __func__, mode);
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|
| 44 |
if (vg_exit()) |
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| 45 |
printf("%s: vg_exit failed to exit to text mode.\n", __func__);
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| 46 |
return 1; |
|
| 47 |
}; |
|
| 40 | 48 |
|
| 49 |
vbe_mode_info_t vbe_mem_info; |
|
| 50 |
|
|
| 51 |
if (vbe_get_mode_information(mode, &vbe_mem_info)) {
|
|
| 52 |
printf("%s: failed to get information for mode %x.\n", __func__, mode);
|
|
| 53 |
if (vg_exit()) |
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| 54 |
printf("%s: vg_exit failed to exit to text mode.\n", __func__);
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| 55 |
return 1; |
|
| 56 |
} |
|
| 57 |
|
|
| 58 |
unsigned int vram_base = vbe_mem_info.PhysBasePtr; |
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| 59 |
unsigned int vram_size = vbe_mem_info.XResolution * vbe_mem_info.YResolution * ((vbe_mem_info.BitsPerPixel + 7) >> 3); |
|
| 60 |
|
|
| 61 |
map_vram(vram_base, vram_size); // if function fails it aborts program |
|
| 62 |
|
|
| 41 | 63 |
tickdelay(micros_to_ticks(delay*1e6)); |
| 42 | 64 |
|
| 43 |
vg_exit(); |
|
| 65 |
if (vg_exit()) {
|
|
| 66 |
printf("%s: vg_exit failed to exit to text mode.\n", __func__);
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|
| 67 |
if (free_memory()) |
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| 68 |
printf("%s: lm_free failed\n", __func__);
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| 69 |
return 1; |
|
| 70 |
} |
|
| 71 |
|
|
| 72 |
if (free_memory()) {
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| 73 |
printf("%s: lm_free failed\n", __func__);
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| 74 |
return 1; |
|
| 75 |
} |
|
| 76 |
|
|
| 44 | 77 |
return 0; |
| 45 | 78 |
} |
| 46 | 79 |
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