git.joshuawise.com / netwatch.git / blame
| Commit | Line | Data |
|---|---|---|
| cdde55f5 JW |
1 | #include <io.h> |
| 2 | #include <text.h> | |
| 3 | #include <paging.h> | |
| 4 | #include <minilib.h> | |
| 5 | #include <stdint.h> | |
| 74032dae JW |
6 | #include <output.h> |
| 7 | #include <smram.h> | |
| 1deef7f3 | 8 | #include <crc32.h> |
| cdde55f5 JW |
9 | |
| 10 | static unsigned char _font[256 * 32]; | |
| 11 | ||
| 12 | /* Must be called from a firstrun context, where we don't care about saving | |
| 13 | * 0x3CE state. */ | |
| 14 | void text_init() | |
| 15 | { | |
| 16 | unsigned char oldread; | |
| 74032dae | 17 | smram_state_t old_state = smram_save_state(); |
| cdde55f5 JW |
18 | outb(0x3CE, 0x05 /* Mode register */); |
| 19 | outb(0x3CF, inb(0x3CF) & ~(0x10 /* Odd/even */)); | |
| 20 | outb(0x3CE, 0x04 /* Read register */); | |
| 21 | oldread = inb(0x3CF); | |
| 22 | outb(0x3CF, 0x02 /* Font plane */); | |
| 74032dae | 23 | smram_aseg_set_state(SMRAM_ASEG_SMMCODE); |
| cdde55f5 | 24 | memcpy(_font, p2v(0xB8000), sizeof(_font)); |
| 74032dae | 25 | smram_restore_state(old_state); |
| cdde55f5 JW |
26 | outb(0x3CF, oldread); |
| 27 | } | |
| 28 | ||
| 66cd7e82 | 29 | void text_render(char *buf, int x, int y, int w, int h) |
| cdde55f5 | 30 | { |
| 74032dae | 31 | unsigned char *video = (unsigned char *)0xB8000; |
| cdde55f5 JW |
32 | unsigned int textx = x / 9; |
| 33 | unsigned int texty = y / 14; | |
| 34 | unsigned int cx, cy; | |
| 35 | unsigned char ch, at, font; | |
| 74032dae | 36 | smram_state_t old_state = smram_save_state(); |
| cdde55f5 | 37 | |
| 53b39ad0 | 38 | outputf("text_render: (%d,%d),(%d,%d)", buf, x, y, w, h); |
| 74032dae JW |
39 | |
| 40 | smram_aseg_set_state(SMRAM_ASEG_SMMCODE); | |
| cdde55f5 JW |
41 | for (cy = y; cy < (y + h); cy++) |
| 42 | { | |
| 77671f96 | 43 | cx = x; |
| cdde55f5 JW |
44 | texty = cy / 14; |
| 45 | textx = cx / 9; | |
| 7364b727 JW |
46 | ch = video[texty * 160 + textx * 2]; |
| 47 | at = video[texty * 160 + textx * 2 + 1]; | |
| cdde55f5 JW |
48 | font = _font[ch * 32 + cy % 14]; |
| 49 | for (cx = x; cx < (x + w); cx++) | |
| 50 | { | |
| 51 | unsigned int pos = cx % 9; | |
| 52 | if (pos == 0) | |
| 53 | { | |
| 54 | textx = cx / 9; | |
| 7364b727 JW |
55 | ch = video[texty * 160 + textx * 2]; |
| 56 | at = video[texty * 160 + textx * 2 + 1]; | |
| cdde55f5 JW |
57 | font = _font[ch * 32 + cy % 14]; |
| 58 | } | |
| 59 | /* XXX always BGR888 */ | |
| 60 | if (pos == 8) /* 9th pixel is cloned */ | |
| 61 | pos = 7; | |
| 62 | if ((font >> (7 - pos)) & 1) | |
| 63 | { | |
| 64 | *(buf++) = (at & 0x01) ? 0xFF : 0x00; | |
| 65 | *(buf++) = (at & 0x02) ? 0xFF : 0x00; | |
| 66 | *(buf++) = (at & 0x04) ? 0xFF : 0x00; | |
| 67 | } else { | |
| 68 | *(buf++) = (at & 0x10) ? 0xFF : 0x00; | |
| 69 | *(buf++) = (at & 0x20) ? 0xFF : 0x00; | |
| 70 | *(buf++) = (at & 0x40) ? 0xFF : 0x00; | |
| 71 | } | |
| 66cd7e82 | 72 | *(buf++) = 0; |
| cdde55f5 JW |
73 | } |
| 74 | } | |
| 74032dae | 75 | smram_restore_state(old_state); |
| cdde55f5 JW |
76 | } |
| 77 | ||
| 78 | uint32_t text_checksum(int x, int y, int w, int h) | |
| 79 | { | |
| 74032dae | 80 | unsigned char *video = (unsigned char *)0xB8000; |
| cdde55f5 JW |
81 | unsigned int textx = x / 9; |
| 82 | unsigned int texty = y / 14; | |
| 83 | int cx, cy; | |
| cdde55f5 | 84 | uint32_t cksm = 0; |
| 74032dae JW |
85 | smram_state_t old_state = smram_save_state(); |
| 86 | ||
| 74032dae | 87 | smram_aseg_set_state(SMRAM_ASEG_SMMCODE); |
| cdde55f5 JW |
88 | |
| 89 | for (cy = y; cy < (y + h); cy++) | |
| 90 | { | |
| 77671f96 | 91 | cx = x; |
| cdde55f5 JW |
92 | texty = cy / 14; |
| 93 | textx = cx / 9; | |
| f2da68c5 | 94 | cksm = crc32(video + texty * 160 + textx * 2, (w / 9) * 2 + 2, cksm); /* Err on the side of 'too many'. */ |
| cdde55f5 JW |
95 | } |
| 96 | ||
| 74032dae JW |
97 | smram_restore_state(old_state); |
| 98 | ||
| cdde55f5 JW |
99 | return cksm; |
| 100 | } |