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hekate/ipl/gfx.c
2018-06-01 18:40:24 +03:00

330 lines
9.5 KiB
C
Executable file

/*
* Copyright (c) 2018 naehrwert
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdarg.h>
#include "gfx.h"
static const u8 _gfx_font[] = {
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0x00, 0x00, 0x3E, 0x66, 0x66, 0x3E, 0x06, 0x00, 0x00, 0x00, 0x7C, 0x66, 0x66, 0x7C, 0x60, 0x00,
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0x00, 0x18, 0x7E, 0x18, 0x18, 0x18, 0x70, 0x00, 0x00, 0x00, 0x66, 0x66, 0x66, 0x66, 0x7C, 0x00,
0x00, 0x00, 0x66, 0x66, 0x66, 0x3C, 0x18, 0x00, 0x00, 0x00, 0xC6, 0xD6, 0xFE, 0x7C, 0x6C, 0x00,
0x00, 0x00, 0x66, 0x3C, 0x18, 0x3C, 0x66, 0x00, 0x00, 0x00, 0x66, 0x66, 0x7C, 0x60, 0x3C, 0x00,
0x00, 0x00, 0x7E, 0x30, 0x18, 0x0C, 0x7E, 0x00, 0x00, 0x00, 0x18, 0x08, 0x08, 0x04, 0x08, 0x08,
0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x0C, 0x08, 0x08, 0x10, 0x08, 0x08,
0x00, 0x00, 0x00, 0x4c, 0x32, 0x00, 0x00, 0x00
};
void gfx_init_ctxt(gfx_ctxt_t *ctxt, u32 *fb, u32 width, u32 height, u32 stride)
{
ctxt->fb = fb;
ctxt->width = width;
ctxt->height = height;
ctxt->stride = stride;
}
void gfx_clear(gfx_ctxt_t *ctxt, u32 color)
{
for (u32 i = 0; i < ctxt->height * ctxt->stride; i++)
ctxt->fb[i] = color;
}
void gfx_con_init(gfx_con_t *con, gfx_ctxt_t *ctxt)
{
con->gfx_ctxt = ctxt;
con->x = 0;
con->y = 0;
con->fgcol = 0xFFCCCCCC;
con->fillbg = 0;
con->bgcol = 0xFF1B1B1B;
}
void gfx_con_setcol(gfx_con_t *con, u32 fgcol, int fillbg, u32 bgcol)
{
con->fgcol = fgcol;
con->fillbg = fillbg;
con->bgcol = bgcol;
}
void gfx_con_getpos(gfx_con_t *con, u32 *x, u32 *y)
{
*x = con->x;
*y = con->y;
}
void gfx_con_setpos(gfx_con_t *con, u32 x, u32 y)
{
con->x = x;
con->y = y;
}
void gfx_putc(gfx_con_t *con, char c)
{
if (c >= 32 && c <= 126)
{
u8 *cbuf = (u8 *)&_gfx_font[8 * (c - 32)];
u32 *fb = con->gfx_ctxt->fb + con->x + con->y * con->gfx_ctxt->stride;
for (u32 i = 0; i < 8; i++)
{
u8 v = *cbuf++;
for (u32 j = 0; j < 8; j++)
{
if (v & 1)
*fb = con->fgcol;
else if (con->fillbg)
*fb = con->bgcol;
v >>= 1;
fb++;
}
fb += con->gfx_ctxt->stride - 8;
}
con->x += 8;
}
else if (c == '\n')
{
con->x = 0;
con->y += 8;
if (con->y > con->gfx_ctxt->height - 8)
con->y = 0;
}
}
void gfx_puts(gfx_con_t *con, const char *s)
{
if (!s)
return;
for (; *s; s++)
gfx_putc(con, *s);
}
static void _gfx_putn(gfx_con_t *con, u32 v, int base, char fill, int fcnt)
{
char buf[65];
static const char digits[] = "0123456789ABCDEFghijklmnopqrstuvwxyz";
char *p;
int c = fcnt;
if (base > 36)
return;
p = buf + 64;
*p = 0;
do
{
c--;
*--p = digits[v % base];
v /= base;
} while (v);
if (fill != 0)
{
while (c > 0)
{
*--p = fill;
c--;
}
}
gfx_puts(con, p);
}
void gfx_printf(gfx_con_t *con, const char *fmt, ...)
{
va_list ap;
int fill, fcnt;
va_start(ap, fmt);
while(*fmt)
{
if(*fmt == '%')
{
fmt++;
fill = 0;
fcnt = 0;
if ((*fmt >= '0' && *fmt <= '9') || *fmt == ' ')
{
fcnt = *fmt;
fmt++;
if (*fmt >= '0' && *fmt <= '9')
{
fill = fcnt;
fcnt = *fmt - '0';
fmt++;
}
else
{
fill = ' ';
fcnt -= '0';
}
}
switch(*fmt)
{
case 'c':
gfx_putc(con, va_arg(ap, u32));
break;
case 's':
gfx_puts(con, va_arg(ap, char *));
break;
case 'd':
_gfx_putn(con, va_arg(ap, u32), 10, fill, fcnt);
break;
case 'x':
case 'X':
_gfx_putn(con, va_arg(ap, u32), 16, fill, fcnt);
break;
case 'k':
con->fgcol = va_arg(ap, u32);
break;
case 'K':
con->bgcol = va_arg(ap, u32);
con->fillbg = fcnt;
break;
case '%':
gfx_putc(con, '%');
break;
case '\0':
goto out;
default:
gfx_putc(con, '%');
gfx_putc(con, *fmt);
break;
}
}
else
gfx_putc(con, *fmt);
fmt++;
}
out:
va_end(ap);
}
void gfx_hexdump(gfx_con_t *con, u32 base, const u8 *buf, u32 len)
{
for(u32 i = 0; i < len; i++)
{
if(i % 0x10 == 0)
{
if(i != 0)
{
gfx_puts(con, "| ");
for(u32 j = 0; j < 0x10; j++)
{
u8 c = buf[i - 0x10 + j];
if(c >= 32 && c <= 126)
gfx_putc(con, c);
else
gfx_putc(con, '.');
}
gfx_putc(con, '\n');
}
gfx_printf(con, "%08x: ", base + i);
}
gfx_printf(con, "%02x ", buf[i]);
if (i == len - 1)
{
int ln = len % 0x10 != 0;
u32 k = 0x10 - 1;
if (ln)
{
k = len & 0xF - 1;
for (u32 j = 0; j < 0x10 - k; j++)
gfx_puts(con, " ");
}
gfx_puts(con, "| ");
for(u32 j = 0; j < (ln ? k : k + 1); j++)
{
u8 c = buf[i - k + j];
if(c >= 32 && c <= 126)
gfx_putc(con, c);
else
gfx_putc(con, '.');
}
gfx_putc(con, '\n');
}
}
gfx_putc(con, '\n');
}
static int abs(int x)
{
if (x < 0)
return -x;
return x;
}
void gfx_set_pixel(gfx_ctxt_t *ctxt, u32 x, u32 y, u32 color)
{
ctxt->fb[x + y * ctxt->stride] = color;
}
void gfx_line(gfx_ctxt_t *ctxt, int x0, int y0, int x1, int y1, u32 color)
{
int dx = abs(x1-x0), sx = x0 < x1 ? 1 : -1;
int dy = abs(y1-y0), sy = y0 < y1 ? 1 : -1;
int err = (dx > dy ? dx : -dy) / 2, e2;
while (1)
{
gfx_set_pixel(ctxt, x0, y0, color);
if (x0 == x1 && y0 == y1)
break;
e2 = err;
if (e2 >-dx) { err -= dy; x0 += sx; }
if (e2 < dy) { err += dx; y0 += sy; }
}
}