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ubb-la/gui.c: label channels

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This commit is contained in:
Werner Almesberger 2013-01-30 23:16:42 -03:00
parent 444e0811bf
commit f99b62636f
1 changed files with 47 additions and 2 deletions
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49
ubb-la/gui.c
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@ -10,11 +10,17 @@
* (at your option) any later version.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE /* for vasprintf */
#endif
#include <stdarg.h>
#include <stdint.h>
#include <stdlib.h>
#include "SDL.h"
#include "SDL_gfxPrimitives.h"
#include "SDL_gfxPrimitives_font.h"
#include "gui.h"
@ -29,8 +35,9 @@
#define XRES 320 /* canvas width */
#define YRES 240 /* canvas height */
#define LEVEL_RGBA 0xffff00ff
#define BOUNCE_RGBA 0xff8080ff
#define LEVEL_RGBA 0xffff00ff /* constant level or single change */
#define BOUNCE_RGBA 0xff8080ff /* bouncing signal */
#define LABEL_RGBA 0xffffffff /* channel label */
#define CH_XOFF 30
#define CH_YOFF 30
@ -80,6 +87,41 @@ static void update(void)
}
/* ----- Text output ------------------------------------------------------- */
/*
* stringColor from SDL_gfx fails for some reason. SDL_ttf is just too much
* compatibility trouble. So we do our own.
*/
static void textf(int x, int y, uint32_t color, const char *fmt, ...)
{
va_list ap;
char *s;
uint8_t *p;
int ix, iy;
int res;
va_start(ap, fmt);
res = vasprintf(&s, fmt, ap);
va_end(ap);
(void) res;
while (*s) {
p = gfxPrimitivesFontdata+(*s << 3);
for (iy = 0; iy != 8; iy++) {
for (ix = 0; ix != 8; ix++)
if ((*p << ix) & 0x80)
pixelColor(surf, x+ix, y+iy, color);
p++;
}
x += 8;
s++;
}
}
/* ----- Waveform elements ------------------------------------------------- */
@ -237,12 +279,15 @@ void gui(const uint8_t *buf, int skip, int nibbles)
int pos = (skip+nibbles) >> 1;
int zoom; /* < 0: zoom out; 0: 1 pixel = 1 sample; > 1: zoom in */
int min_zoom = 0;
int i;
while (XRES-CH_XOFF < (nibbles-skip) >> -min_zoom)
min_zoom--;
zoom = min_zoom;
while (1) {
clear();
for (i = 0; i != 4; i++)
textf(0, ch_y(i, 1), LABEL_RGBA, "CH%d", i);
show_buffer(buf, skip, nibbles, CH_XOFF, XRES, zoom, pos);
update();