mirror of
git://projects.qi-hardware.com/antorcha.git
synced 2024-12-01 19:57:30 +02:00
131 lines
2.5 KiB
C
131 lines
2.5 KiB
C
/*
|
|
* tools/ant-cl/plot.c - Sample plot
|
|
*
|
|
* Written 2012 by Werner Almesberger
|
|
* Copyright 2012 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 <stdlib.h>
|
|
|
|
#include "SDL.h"
|
|
#include "SDL_gfxPrimitives.h"
|
|
|
|
#include "plot.h"
|
|
|
|
|
|
#define XRES 1024
|
|
#define YRES 1024
|
|
|
|
#define RADIUS 3
|
|
|
|
#define OLD_RGBA 0xffffff20
|
|
#define NEW_RGBA 0xffffffff
|
|
|
|
|
|
static SDL_Surface *surf;
|
|
static int first = 1;
|
|
static int last_x, last_y;
|
|
|
|
static SDL_Surface *back;
|
|
static SDL_Rect back_rect = {
|
|
.x = 0,
|
|
.y = 0,
|
|
.w = 2*RADIUS+1,
|
|
.h = 2*RADIUS+1,
|
|
};
|
|
|
|
static SDL_Rect front_rect = {
|
|
.w = 2*RADIUS+1,
|
|
.h = 2*RADIUS+1,
|
|
};
|
|
|
|
|
|
int plot(int x, int y)
|
|
{
|
|
SDL_Event event;
|
|
|
|
if (!first) {
|
|
SDL_BlitSurface(back, &back_rect, surf, &front_rect);
|
|
SDL_LockSurface(surf);
|
|
filledCircleColor(surf, last_x, last_y, RADIUS, OLD_RGBA);
|
|
SDL_UnlockSurface(surf);
|
|
}
|
|
|
|
front_rect.x = x;
|
|
front_rect.y = y;
|
|
x += RADIUS;
|
|
y += RADIUS;
|
|
|
|
SDL_BlitSurface(surf, &front_rect, back, &back_rect);
|
|
SDL_LockSurface(surf);
|
|
filledCircleColor(surf, x, y, RADIUS, NEW_RGBA);
|
|
SDL_UnlockSurface(surf);
|
|
|
|
if (!first)
|
|
SDL_UpdateRect(surf,
|
|
last_x-RADIUS, last_y-RADIUS, 2*RADIUS+1, 2*RADIUS+1);
|
|
SDL_UpdateRect(surf, x-RADIUS, y-RADIUS, 2*RADIUS+1, 2*RADIUS+1);
|
|
|
|
first = 0;
|
|
last_x = x;
|
|
last_y = y;
|
|
|
|
while (SDL_PollEvent(&event))
|
|
switch (event.type) {
|
|
case SDL_KEYDOWN:
|
|
switch (event.key.keysym.sym) {
|
|
case SDLK_c:
|
|
SDL_LockSurface(surf);
|
|
SDL_FillRect(surf, NULL,
|
|
SDL_MapRGB(surf->format, 0, 0, 0));
|
|
SDL_UpdateRect(surf, 0, 0, 0, 0);
|
|
SDL_UnlockSurface(surf);
|
|
break;
|
|
case SDLK_q:
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case SDL_QUIT:
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
|
|
void plot_init(void)
|
|
{
|
|
const SDL_PixelFormat *f;
|
|
|
|
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
|
|
fprintf(stderr, "SDL_init: %s\n", SDL_GetError());
|
|
exit(1);
|
|
}
|
|
atexit(SDL_Quit);
|
|
|
|
surf = SDL_SetVideoMode(XRES+2*RADIUS+1, YRES+2*RADIUS+1, 0,
|
|
SDL_SWSURFACE);
|
|
if (!surf) {
|
|
fprintf(stderr, "SDL_SetVideoMode: %s\n", SDL_GetError());
|
|
exit(1);
|
|
}
|
|
|
|
f = surf->format;
|
|
back = SDL_CreateRGBSurface(SDL_SWSURFACE, 2*RADIUS+1, 2*RADIUS+1,
|
|
f->BitsPerPixel, f->Rmask, f->Gmask, f->Bmask, f->Amask);
|
|
if (!back) {
|
|
fprintf(stderr, "SDL_SetVideoMode: %s\n", SDL_GetError());
|
|
exit(1);
|
|
}
|
|
}
|