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> | |
| cdde55f5 JW |
8 | |
| 9 | static unsigned char _font[256 * 32]; | |
| 10 | ||
| 11 | /* Must be called from a firstrun context, where we don't care about saving | |
| 12 | * 0x3CE state. */ | |
| 13 | void text_init() | |
| 14 | { | |
| 15 | unsigned char oldread; | |
| 74032dae | 16 | smram_state_t old_state = smram_save_state(); |
| cdde55f5 JW |
17 | outb(0x3CE, 0x05 /* Mode register */); |
| 18 | outb(0x3CF, inb(0x3CF) & ~(0x10 /* Odd/even */)); | |
| 19 | outb(0x3CE, 0x04 /* Read register */); | |
| 20 | oldread = inb(0x3CF); | |
| 21 | outb(0x3CF, 0x02 /* Font plane */); | |
| 74032dae | 22 | smram_aseg_set_state(SMRAM_ASEG_SMMCODE); |
| cdde55f5 | 23 | memcpy(_font, p2v(0xB8000), sizeof(_font)); |
| 74032dae | 24 | smram_restore_state(old_state); |
| cdde55f5 JW |
25 | outb(0x3CF, oldread); |
| 26 | } | |
| 27 | ||
| 66cd7e82 | 28 | void text_render(char *buf, int x, int y, int w, int h) |
| cdde55f5 | 29 | { |
| 74032dae | 30 | unsigned char *video = (unsigned char *)0xB8000; |
| cdde55f5 JW |
31 | unsigned int textx = x / 9; |
| 32 | unsigned int texty = y / 14; | |
| 33 | unsigned int cx, cy; | |
| 34 | unsigned char ch, at, font; | |
| 74032dae | 35 | smram_state_t old_state = smram_save_state(); |
| cdde55f5 | 36 | |
| 74032dae JW |
37 | outputf("text_render: buf %08x, (%d,%d),(%d,%d)", buf, x, y, w, h); |
| 38 | ||
| 39 | smram_aseg_set_state(SMRAM_ASEG_SMMCODE); | |
| cdde55f5 JW |
40 | for (cy = y; cy < (y + h); cy++) |
| 41 | { | |
| 42 | texty = cy / 14; | |
| 43 | textx = cx / 9; | |
| 44 | ch = video[texty * 50 + textx * 2]; | |
| 45 | at = video[texty * 50 + textx * 2 + 1]; | |
| 46 | font = _font[ch * 32 + cy % 14]; | |
| 47 | for (cx = x; cx < (x + w); cx++) | |
| 48 | { | |
| 49 | unsigned int pos = cx % 9; | |
| 50 | if (pos == 0) | |
| 51 | { | |
| 52 | textx = cx / 9; | |
| 53 | ch = video[texty * 50 + textx * 2]; | |
| 54 | at = video[texty * 50 + textx * 2 + 1]; | |
| 55 | font = _font[ch * 32 + cy % 14]; | |
| 56 | } | |
| 57 | /* XXX always BGR888 */ | |
| 58 | if (pos == 8) /* 9th pixel is cloned */ | |
| 59 | pos = 7; | |
| 60 | if ((font >> (7 - pos)) & 1) | |
| 61 | { | |
| 62 | *(buf++) = (at & 0x01) ? 0xFF : 0x00; | |
| 63 | *(buf++) = (at & 0x02) ? 0xFF : 0x00; | |
| 64 | *(buf++) = (at & 0x04) ? 0xFF : 0x00; | |
| 65 | } else { | |
| 66 | *(buf++) = (at & 0x10) ? 0xFF : 0x00; | |
| 67 | *(buf++) = (at & 0x20) ? 0xFF : 0x00; | |
| 68 | *(buf++) = (at & 0x40) ? 0xFF : 0x00; | |
| 69 | } | |
| 66cd7e82 | 70 | *(buf++) = 0; |
| cdde55f5 JW |
71 | } |
| 72 | } | |
| 74032dae | 73 | smram_restore_state(old_state); |
| cdde55f5 JW |
74 | } |
| 75 | ||
| 76 | uint32_t text_checksum(int x, int y, int w, int h) | |
| 77 | { | |
| 74032dae | 78 | unsigned char *video = (unsigned char *)0xB8000; |
| cdde55f5 JW |
79 | unsigned int textx = x / 9; |
| 80 | unsigned int texty = y / 14; | |
| 81 | int cx, cy; | |
| 82 | unsigned char ch, at; | |
| 83 | uint32_t cksm = 0; | |
| 74032dae JW |
84 | smram_state_t old_state = smram_save_state(); |
| 85 | ||
| 86 | outputf("checksum: (%d,%d),(%d,%d)", x,y,w,h); | |
| 87 | ||
| 88 | smram_aseg_set_state(SMRAM_ASEG_SMMCODE); | |
| cdde55f5 JW |
89 | |
| 90 | for (cy = y; cy < (y + h); cy++) | |
| 91 | { | |
| 92 | texty = cy / 14; | |
| 93 | textx = cx / 9; | |
| 94 | ch = video[texty * 50 + textx * 2]; | |
| 95 | at = video[texty * 50 + textx * 2 + 1]; | |
| 96 | for (cx = x; cx < (x + w); cx++) | |
| 97 | { | |
| 98 | unsigned int pos = cx % 9; | |
| 99 | if (pos == 0) | |
| 100 | { | |
| 101 | textx = cx / 9; | |
| 102 | ch = video[texty * 50 + textx * 2]; | |
| 103 | at = video[texty * 50 + textx * 2 + 1]; | |
| 104 | } | |
| 105 | ||
| 106 | cksm += ch + (at << 16); | |
| 107 | } | |
| 108 | } | |
| 109 | ||
| 74032dae JW |
110 | smram_restore_state(old_state); |
| 111 | ||
| 112 | outputf("checksum: %08x", cksm); | |
| 113 | ||
| cdde55f5 JW |
114 | return cksm; |
| 115 | } |