mirror of
git://projects.qi-hardware.com/ben-wpan.git
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113 lines
2.1 KiB
C
113 lines
2.1 KiB
C
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/*
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* atrf-path/gui.c - Graphical output for atrf-path
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*
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* Written 2011 by Werner Almesberger
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* Copyright 2011 Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "SDL.h"
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#include "SDL_gfxPrimitives.h"
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#include "at86rf230.h"
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#include "atrf.h"
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#include "misctxrx.h"
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#include "sweep.h"
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#include "gui.h"
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#define XRES 320
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#define YRES 240
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#define N_CHAN 16
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#define FG_RGBA 0xffffffff /* measurement color */
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#define CHAN_STEP 20 /* 4 pixels/MHz */
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#define SIDE_STEP 2
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#define CHAN_X_OFFSET 10
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#define Y_MIN -94
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#define Y_MAX -10
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static void segment(SDL_Surface *s, int *last_x, int *last_y, int x,
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const struct sample *res, int have_last)
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{
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int y = YRES-(res->avg-Y_MIN)/(Y_MAX-Y_MIN)*YRES-1;
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if (have_last) {
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aalineColor(s, *last_x, *last_y, x, y, FG_RGBA);
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}
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*last_x = x;
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*last_y = y;
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}
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static void draw(SDL_Surface *s, const struct sample *res)
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{
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int last_x, last_y;
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int x, i;
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x = CHAN_X_OFFSET;
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for (i = 0; i != N_CHAN; i++) {
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segment(s, &last_x, &last_y, x, res++, i);
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x += 2*SIDE_STEP;
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segment(s, &last_x, &last_y, x, res++, 1);
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x += CHAN_STEP-2*SIDE_STEP;
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}
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}
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static void clear(SDL_Surface *s)
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{
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SDL_FillRect(s, NULL, SDL_MapRGB(s->format, 0, 0, 0));
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}
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void gui(const struct sweep *sweep)
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{
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SDL_Surface *surf;
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SDL_Event event;
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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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fprintf(stderr, "SDL_init: %s\n", SDL_GetError());
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exit(1);
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}
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atexit(SDL_Quit);
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surf = SDL_SetVideoMode(XRES, YRES, 0, SDL_SWSURFACE);
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if (!surf) {
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fprintf(stderr, "SDL_SetVideoMode: %s\n", SDL_GetError());
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exit(1);
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}
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while (1) {
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struct sample res[N_CHAN*2];
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while (SDL_PollEvent(&event))
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if (event.type == SDL_KEYDOWN ||
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event.type == SDL_QUIT)
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return;
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do_sweep(sweep, res);
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SDL_LockSurface(surf);
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clear(surf);
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draw(surf, res);
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SDL_UnlockSurface(surf);
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SDL_UpdateRect(surf, 0, 0, 0, 0);
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}
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}
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