+++ /dev/null
-#include <io.h>
-#include <text.h>
-#include <paging.h>
-#include <minilib.h>
-#include <stdint.h>
-
-static unsigned char _font[256 * 32];
-
-/* Must be called from a firstrun context, where we don't care about saving
- * 0x3CE state. */
-void text_init()
-{
- unsigned char oldread;
- outb(0x3CE, 0x05 /* Mode register */);
- outb(0x3CF, inb(0x3CF) & ~(0x10 /* Odd/even */));
- outb(0x3CE, 0x04 /* Read register */);
- oldread = inb(0x3CF);
- outb(0x3CF, 0x02 /* Font plane */);
- memcpy(_font, p2v(0xB8000), sizeof(_font));
- outb(0x3CF, oldread);
-}
-
-void text_render(unsigned char *buf, unsigned int x, unsigned int y, unsigned int w, unsigned int h)
-{
- unsigned char *video = p2v(0xB8000);
- unsigned int textx = x / 9;
- unsigned int texty = y / 14;
- unsigned int cx, cy;
- unsigned char ch, at, font;
-
- for (cy = y; cy < (y + h); cy++)
- {
- texty = cy / 14;
- textx = cx / 9;
- ch = video[texty * 50 + textx * 2];
- at = video[texty * 50 + textx * 2 + 1];
- font = _font[ch * 32 + cy % 14];
- for (cx = x; cx < (x + w); cx++)
- {
- unsigned int pos = cx % 9;
- if (pos == 0)
- {
- textx = cx / 9;
- ch = video[texty * 50 + textx * 2];
- at = video[texty * 50 + textx * 2 + 1];
- font = _font[ch * 32 + cy % 14];
- }
- /* XXX always BGR888 */
- if (pos == 8) /* 9th pixel is cloned */
- pos = 7;
- if ((font >> (7 - pos)) & 1)
- {
- *(buf++) = (at & 0x01) ? 0xFF : 0x00;
- *(buf++) = (at & 0x02) ? 0xFF : 0x00;
- *(buf++) = (at & 0x04) ? 0xFF : 0x00;
- } else {
- *(buf++) = (at & 0x10) ? 0xFF : 0x00;
- *(buf++) = (at & 0x20) ? 0xFF : 0x00;
- *(buf++) = (at & 0x40) ? 0xFF : 0x00;
- }
- }
- }
-}
-
-uint32_t text_checksum(int x, int y, int w, int h)
-{
- unsigned char *video = p2v(0xB8000);
- unsigned int textx = x / 9;
- unsigned int texty = y / 14;
- int cx, cy;
- unsigned char ch, at;
- uint32_t cksm = 0;
-
- for (cy = y; cy < (y + h); cy++)
- {
- texty = cy / 14;
- textx = cx / 9;
- ch = video[texty * 50 + textx * 2];
- at = video[texty * 50 + textx * 2 + 1];
- for (cx = x; cx < (x + w); cx++)
- {
- unsigned int pos = cx % 9;
- if (pos == 0)
- {
- textx = cx / 9;
- ch = video[texty * 50 + textx * 2];
- at = video[texty * 50 + textx * 2 + 1];
- }
-
- cksm += ch + (at << 16);
- }
- }
-
- return cksm;
-}