56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ncurses.h>
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#include "msg.h"
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#include "display.h"
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void setup_display() {
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initscr(); // ncurses initialization
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curs_set(0); // invisible cursor
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}
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void cleanup_display() {
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endwin(); // clean ncurses shutdown
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}
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/*
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image[row][col] >>> image[row*width+col];
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uint32_t width; // normally 80
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uint32_t height; // normally 25, may vary
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char *image; // dimension is width x height
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*/
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static void print_current_image(const struct message* msg, int start, int end) {
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end = 80; // end is ignored and 80 is used, should be handled properly later
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//move(0,0); // start in the upper left corner
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char *pic = msg->image; // get a ptr to the actual image
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for (int row=0; row < 25; row++) { // iterate over rows
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char *original_line = pic + row * msg->width; // pointer to the start of the line to print
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char *line = (char*) malloc(end-start+1); // allocate a line because we modify it
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strcpy(line, original_line + start); // get a line from the right start
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line[end-start] = '\0'; // terminate it
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mvprintw(row, 0, "%s", line); // print it
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free(line); // free it
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}
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refresh(); // refresh the screen
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}
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void callback(const struct message *msg, const struct prog_info *pinfo) {
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printf("in callback, tst=%d\n", msg->timestamp);
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// calculate the actual offset to use
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int start = msg->timestamp % msg->width + pinfo->client_offset;
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print_current_image(msg, start, start+80);
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}
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