mirror of
https://github.com/xdsopl/robot36.git
synced 2025-12-06 07:12:07 +01:00
124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/*
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robot36 - encode and decode images using SSTV in Robot 36 mode
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Written in 2011 by <Ahmet Inan> <xdsopl@googlemail.com>
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To the extent possible under law, the author(s) have dedicated all copyright and related and neighboring rights to this software to the public domain worldwide. This software is distributed without any warranty.
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You should have received a copy of the CC0 Public Domain Dedication along with this software. If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <SDL.h>
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#include "img.h"
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typedef struct {
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void (*close)(img_t *);
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uint8_t *pixel;
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int width;
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int height;
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SDL_Surface *screen;
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SDL_Thread *thread;
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int quit;
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} sdl_t;
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void handle_events()
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{
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SDL_Event event;
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while (SDL_PollEvent(&event)) {
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switch (event.type) {
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case SDL_KEYDOWN:
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switch (event.key.keysym.sym) {
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case SDLK_q:
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exit(0);
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break;
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case SDLK_ESCAPE:
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exit(0);
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break;
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default:
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break;
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}
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break;
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case SDL_QUIT:
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exit(0);
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break;
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default:
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break;
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}
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}
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}
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int update_sdl(void *data)
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{
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sdl_t *sdl = (sdl_t *)data;
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while (!sdl->quit) {
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for (int i = 0; i < sdl->width * sdl->height; i++) {
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uint8_t *src = sdl->pixel + i * 3;
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uint8_t *dst = sdl->screen->pixels + i * 4;
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dst[0] = src[2];
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dst[1] = src[1];
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dst[2] = src[0];
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dst[3] = 0;
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}
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SDL_Flip(sdl->screen);
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SDL_Delay(100);
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handle_events();
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}
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return 0;
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}
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void close_sdl(img_t *img)
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{
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sdl_t *sdl = (sdl_t *)img;
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sdl->quit = 1;
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SDL_WaitThread(sdl->thread, 0);
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SDL_Quit();
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free(sdl->pixel);
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}
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int open_sdl_write(img_t **p, char *name, int width, int height)
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{
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sdl_t *sdl = (sdl_t *)malloc(sizeof(sdl_t));
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sdl->close = close_sdl;
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atexit(SDL_Quit);
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SDL_Init(SDL_INIT_VIDEO);
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sdl->screen = SDL_SetVideoMode(width, height, 32, SDL_SWSURFACE);
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if (!sdl->screen) {
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fprintf(stderr, "couldnt open %s window %dx%d@32\n", name, width, height);
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SDL_Quit();
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free(sdl);
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return 0;
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}
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if (sdl->screen->format->BytesPerPixel != 4 || sdl->screen->w != width || sdl->screen->h != height) {
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fprintf(stderr, "requested %dx%d@32 but got %s window %dx%d@32\n", width, height, name, sdl->screen->w, sdl->screen->h);
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SDL_Quit();
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free(sdl);
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return 0;
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}
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SDL_WM_SetCaption("robot36", "robot36");
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SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
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sdl->width = width;
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sdl->height = height;
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sdl->pixel = malloc(width * height * 3);
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memset(sdl->pixel, 0, width * height * 3);
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memset(sdl->screen->pixels, 0, width * height * 4);
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sdl->quit = 0;
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sdl->thread = SDL_CreateThread(update_sdl, sdl);
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if (!sdl->thread) {
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fprintf(stderr, "Unable to create thread: %s\n", SDL_GetError());
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SDL_Quit();
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free(sdl);
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return 0;
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}
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*p = (img_t *)sdl;
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return 1;
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}
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