mirror of
git://projects.qi-hardware.com/ben-wpan.git
synced 2024-11-23 00:58:26 +02:00
6ee514239e
- tools/atrf-*/atspi-*.c: renamed to atrf-*.c - tools/atrf-*/Makefile (MAIN): updated name of program - tools/atrf-*/*.c: updated path in title comment
100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
/*
|
|
* atrf-rssi/zgrid.c - Display a surface in faux 3D with SDL/SDL_gfx
|
|
*
|
|
* Written 2010 by Werner Almesberger
|
|
* Copyright 2010 Werner Almesberger
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
#include "SDL.h"
|
|
#include "SDL_gfxPrimitives.h"
|
|
|
|
#include "zgrid.h"
|
|
|
|
|
|
#define SWAP(x, y) \
|
|
do { typeof(x) swap_tmp = (x); (x) = (y); (y) = swap_tmp; } while (0)
|
|
|
|
|
|
static int *alloc_row(int nx)
|
|
{
|
|
int *p;
|
|
|
|
p = malloc(nx*sizeof(*p));
|
|
if (p)
|
|
return p;
|
|
perror("malloc");
|
|
exit(1);
|
|
}
|
|
|
|
|
|
static void draw_band(SDL_Surface *s, const int *ax, const int *ay,
|
|
const int *bx, const int *by, int n, uint32_t fg, uint32_t bg)
|
|
{
|
|
Sint16 px[4], py[4];
|
|
int i;
|
|
|
|
for (i = n-2; i >= 0; i--) {
|
|
px[0] = ax[i];
|
|
px[1] = ax[i+1];
|
|
px[2] = bx[i+1];
|
|
px[3] = bx[i];
|
|
py[0] = ay[i];
|
|
py[1] = ay[i+1];
|
|
py[2] = by[i+1];
|
|
py[3] = by[i];
|
|
filledPolygonColor(s, px, py, 4, bg);
|
|
aalineColor(s, ax[i+1], ay[i+1], bx[i+1], by[i+1], fg);
|
|
aalineColor(s, bx[i], by[i], bx[i+1], by[i+1], fg);
|
|
}
|
|
aalineColor(s, ax[0], ay[0], bx[0], by[0], fg);
|
|
}
|
|
|
|
|
|
static void draw_polyline(SDL_Surface *s, const int *px, const int *py,
|
|
int n, uint32_t rgba)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i != n-1; i++)
|
|
aalineColor(s, px[i], py[i], px[i+1], py[i+1], rgba);
|
|
}
|
|
|
|
|
|
void zgrid_draw(SDL_Surface *s, const int *z, int nx, int ny,
|
|
int sx, int sy, int sxy, int x0, int y0, uint32_t fg, uint32_t bg)
|
|
{
|
|
int *lx = alloc_row(nx);
|
|
int *ly = alloc_row(nx);
|
|
int *px = alloc_row(nx);
|
|
int *py = alloc_row(nx);
|
|
int x, y, yz0;
|
|
const int *zp;
|
|
uint8_t a;
|
|
|
|
for (y = ny-1; y >= 0; y--) {
|
|
a = (ny-1-y)*0xe0/(ny-1)+0x1f;
|
|
yz0 = s->h-y0-y*sy-1;
|
|
zp = z+y*nx;
|
|
for (x = 0; x != nx; x++) {
|
|
px[x] = x0+x*sx+y*sxy;
|
|
py[x] = yz0-zp[x];
|
|
}
|
|
if (y != ny-1) {
|
|
draw_band(s, px, py, lx, ly, nx, fg | a, bg);
|
|
}
|
|
SWAP(px, lx);
|
|
SWAP(py, ly);
|
|
}
|
|
draw_polyline(s, lx, ly, nx, fg | 0xff);
|
|
}
|