9 static unsigned char _font[256 * 32];
11 /* Must be called from a firstrun context, where we don't care about saving
15 unsigned char oldread;
16 smram_state_t old_state = smram_save_state();
17 outb(0x3CE, 0x05 /* Mode register */);
18 outb(0x3CF, inb(0x3CF) & ~(0x10 /* Odd/even */));
19 outb(0x3CE, 0x04 /* Read register */);
21 outb(0x3CF, 0x02 /* Font plane */);
22 smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
23 memcpy(_font, p2v(0xB8000), sizeof(_font));
24 smram_restore_state(old_state);
28 void text_render(char *buf, int x, int y, int w, int h)
30 unsigned char *video = (unsigned char *)0xB8000;
31 unsigned int textx = x / 9;
32 unsigned int texty = y / 14;
34 unsigned char ch, at, font;
35 smram_state_t old_state = smram_save_state();
37 outputf("text_render: buf %08x, (%d,%d),(%d,%d)", buf, x, y, w, h);
39 smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
40 for (cy = y; cy < (y + h); cy++)
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++)
49 unsigned int pos = cx % 9;
53 ch = video[texty * 50 + textx * 2];
54 at = video[texty * 50 + textx * 2 + 1];
55 font = _font[ch * 32 + cy % 14];
57 /* XXX always BGR888 */
58 if (pos == 8) /* 9th pixel is cloned */
60 if ((font >> (7 - pos)) & 1)
62 *(buf++) = (at & 0x01) ? 0xFF : 0x00;
63 *(buf++) = (at & 0x02) ? 0xFF : 0x00;
64 *(buf++) = (at & 0x04) ? 0xFF : 0x00;
66 *(buf++) = (at & 0x10) ? 0xFF : 0x00;
67 *(buf++) = (at & 0x20) ? 0xFF : 0x00;
68 *(buf++) = (at & 0x40) ? 0xFF : 0x00;
73 smram_restore_state(old_state);
76 uint32_t text_checksum(int x, int y, int w, int h)
78 unsigned char *video = (unsigned char *)0xB8000;
79 unsigned int textx = x / 9;
80 unsigned int texty = y / 14;
84 smram_state_t old_state = smram_save_state();
86 outputf("checksum: (%d,%d),(%d,%d)", x,y,w,h);
88 smram_aseg_set_state(SMRAM_ASEG_SMMCODE);
90 for (cy = y; cy < (y + h); cy++)
94 ch = video[texty * 50 + textx * 2];
95 at = video[texty * 50 + textx * 2 + 1];
96 for (cx = x; cx < (x + w); cx++)
98 unsigned int pos = cx % 9;
102 ch = video[texty * 50 + textx * 2];
103 at = video[texty * 50 + textx * 2 + 1];
106 cksm += ch + (at << 16);
110 smram_restore_state(old_state);
112 outputf("checksum: %08x", cksm);