135 lines
2.9 KiB
C
135 lines
2.9 KiB
C
#include "net.h"
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#include "canvas.h"
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#include <stdlib.h>
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#include <errno.h>
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#include <stdio.h> //sprintf
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int px_width = 1024;
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int px_height = 1024;
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// Helper functions
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static int util_str_starts_with(const char* prefix, const char* str) {
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char cp, cs;
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while ((cp = *prefix++) == (cs = *str++)) {
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if (cp == 0)
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return 1;
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}
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return !cp;
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}
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// server callbacks
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void px_on_connect(NetClient *client) {
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}
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void px_on_read(NetClient *client, char *line) {
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if (util_str_starts_with("PX ", line)) {
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const char * ptr = line + 3;
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char * endptr = (char*) ptr;
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errno = 0;
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unsigned int x = strtoul(ptr, &endptr, 10);
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if (endptr == ptr || errno) {
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net_err(client,
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"First parameter missing or invalid (should be decimal)");
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return;
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}
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unsigned int y = strtoul((ptr = endptr), &endptr, 10);
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if (endptr == ptr || errno) {
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net_err(client,
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"Second parameter missing or invalid (should be decimal)");
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return;
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}
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// PX <x> <y> -> Get RGB color at position (x,y) or '0x000000' for out-of-range queries
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if (*endptr == 0) {
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uint32_t c;
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canvas_get_px(x, y, &c);
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char str[64];
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sprintf(str, "PX %u %u %06X", x, y, (c >> 8));
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net_send(client, str);
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return;
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}
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// PX <x> <y> BB|RRGGBB|RRGGBBAA
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unsigned long int c = strtoul((ptr = endptr), &endptr, 16);
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if (endptr == ptr || errno) {
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net_err(client,
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"Third parameter missing or invalid (should be hex color)");
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return;
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}
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if (endptr - 1 - 6 == ptr) {
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// RGB -> RGBA
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c = (c << 8) + 0xff;
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} else if (endptr - 1 - 8 == ptr) {
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// done
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} else if (endptr - 1 - 2 == ptr) {
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// WW -> RGBA
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c = (c << 24) + (c << 16) + (c << 8) + 0xff;
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} else {
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net_err(client,
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"Color hex code must be 2, 6 or 8 characters long (WW, RGB or RGBA)");
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return;
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}
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canvas_set_px(x, y, c);
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} else if (util_str_starts_with("SIZE", line)) {
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char str[64];
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sprintf(str, "SIZE %d %d", px_width, px_height);
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net_send(client, str);
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} else if (util_str_starts_with("HELP", line)) {
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net_send(client,
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"\
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PX x y: Get color at position (x,y)\n\
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PX x y rrggbb(aa): Draw a pixel (with optional alpha channel)\n\
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SIZE: Get canvas size");
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} else {
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net_err(client, "Unknown command");
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}
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}
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void px_on_close(NetClient *client, int error) {
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}
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void px_on_key(int key, int scancode, int mods) {
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if (key == 300) { // F11
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int display = canvas_get_display();
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if (display < 0)
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canvas_fullscreen(0);
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else
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canvas_fullscreen(-1);
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} else if (key == 301) { // F12
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canvas_fullscreen(canvas_get_display() + 1);
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} else if (key == 81 || key == 256) { // q or ESC
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canvas_close();
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}
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}
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void px_on_resize() {
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canvas_get_size(&px_width, &px_height);
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}
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void px_on_window_close() {
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printf("Window closed\n");
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net_stop();
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}
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int main(int argc, char **argv) {
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canvas_start(1024, &px_on_window_close);
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canvas_setcb_key(&px_on_key);
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canvas_setcb_resize(&px_on_resize);
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net_start(1337, &px_on_connect, &px_on_read, &px_on_close);
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return 0;
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}
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