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basic text drawing function from PCSX

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This commit is contained in:
notaz 2012-11-11 21:00:45 +02:00
parent c688b90fe2
commit e515f1a40b
2 changed files with 58 additions and 0 deletions
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56
fonts.c
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@ -1,3 +1,6 @@
#include <stdio.h>
#include <stdarg.h>
unsigned char fontdata8x8[64*16] =
{
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
@ -216,3 +219,56 @@ unsigned char fontdata6x8[256][8] = {
{ 0x00>>2, 0x10>>2, 0x10>>2, 0x28>>2, 0x28>>2, 0x44>>2, 0x7c>>2, 0x00>>2, },
};
/* note: may use 1 extra pixel on the right */
void basic_text_out16_nf(void *fb, int w, int x, int y, const char *text)
{
int i, l;
unsigned short *screen;
unsigned short val = 0xffff;
screen = (unsigned short *)fb + x + y * w;
for (i = 0; ; i++, screen += 8)
{
char c = text[i];
if (c == 0)
break;
if (c == ' ')
continue;
for (l = 0; l < 8; l++)
{
unsigned char fd = fontdata8x8[c * 8 + l];
unsigned short *s = screen + l * w;
unsigned char fd1, fdp = 0;
if (fd&0x80) s[0] = val;
if (fd&0x40) s[1] = val;
if (fd&0x20) s[2] = val;
if (fd&0x10) s[3] = val;
if (fd&0x08) s[4] = val;
if (fd&0x04) s[5] = val;
if (fd&0x02) s[6] = val;
if (fd&0x01) s[7] = val;
// draw "shadow"
if (l > 0)
fdp = fontdata8x8[c * 8 + l - 1];
for (fd1 = 0x80; fd1 != 0; fd1 >>= 1, s++)
if (!(fd & (fd1 >> 1)) && ((fdp | fd) & fd1))
s[1] = (s[1] >> 1) & 0x7bef;
}
}
}
void basic_text_out16(void *fb, int w, int x, int y, const char *texto, ...)
{
va_list args;
char buffer[256];
va_start(args, texto);
vsnprintf(buffer, sizeof(buffer), texto, args);
va_end(args);
basic_text_out16_nf(fb, w, x, y, buffer);
}