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EasterEggScreen.cpp
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EasterEggScreen.cpp
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/*
* Copyright (C) 2018 Me and My Shadow
*
* This file is part of Me and My Shadow.
*
* Me and My Shadow 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 3 of the License, or
* (at your option) any later version.
*
* Me And My Shadow is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Me and My Shadow. If not, see <http://www.gnu.org/licenses/>.
*/
#include "EasterEggScreen.h"
#include "SoundManager.h"
#include "Render.h"
#include "Globals.h"
#include "Functions.h"
#include "InputManager.h"
#include <SDL_mixer.h>
#include <SDL_ttf.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <string>
#include <map>
//Define this to enable fake "ls -la" screen.
#define SCAM
#ifdef SCAM
const unsigned int randMaxPlusOne = (unsigned int)(RAND_MAX) + 1;
struct FakeSoundEffectState {
Sint16 buffer[4096];
int state;
int randContext;
int rand() {
randContext = (randContext * 1103515245 + 12345) & 0x7FFFFFFF;
return ((randContext << 15) | (randContext >> 16)) & RAND_MAX;
}
};
static void SDLCALL fakeSoundEffect(void *udata, Uint8 *stream_, int len) {
FakeSoundEffectState *state = (FakeSoundEffectState*)udata;
Sint16 *stream = (Sint16*)stream_;
int len2 = len / 2; // NOTE: len is in bytes, not in samples !!!
int len3 = len2;
if (len3 > sizeof(state->buffer) / sizeof(state->buffer[0])) {
len3 = sizeof(state->buffer) / sizeof(state->buffer[0]);
}
if (state->state & 0xFF) {
state->state--;
} else {
state->state = int(float(state->rand()) / float(randMaxPlusOne) * 9.0f) << 8;
if (state->state) state->state |= int(float(state->rand()) / float(randMaxPlusOne) * 10.0f);
else state->state |= int(float(state->rand()) / float(randMaxPlusOne) * 80.0f);
switch (state->state >> 8) {
case 1:
memcpy(state->buffer, stream, len3 * sizeof(Sint16));
break;
}
}
int i;
switch (state->state >> 8) {
case 0:
break;
case 1:
memcpy(stream, state->buffer, len3 * sizeof(Sint16));
break;
case 2:
for (i = 0; i < len2; i++) {
stream[i] = stream[i] >= 0 ? 0x7FFF : 0x8000;
}
break;
case 3:
for (i = 1; i < len2; i++) {
stream[i] ^= stream[i - 1];
}
break;
case 4:
for (i = 0; i < len2 / 2; i++) {
std::swap(stream[i], stream[len2 - 1 - i]);
}
break;
case 5:
for (i = 0; i < len2; i++) {
bool b = (stream[i] & 0x1000) != 0;
if (stream[i] < 0) b = !b;
stream[i] <<= 3;
if (b) stream[i] = ~stream[i];
}
break;
case 6:
memcpy(state->buffer, stream, len3 * sizeof(Sint16));
for (i = 0; i < len3; i += 2) {
stream[i / 2] = state->buffer[i];
}
for (i = 1; i < len3; i += 2) {
stream[(len3 + i) / 2] = state->buffer[i];
}
case 7:
for (i = 0; i < len2; i++) {
float f = float(stream[i]);
stream[i] = Sint32(f * f * f / 1073741824.0f);
}
break;
case 8:
for (i = 0; i < len2; i++) {
stream[i] = 0;
}
break;
}
}
FakeSoundEffectState fakeSoundEffectState;
static void scamDrawText(ImageManager& imageManager, SDL_Renderer& renderer,
const std::map<int, TexturePtr>& cache,
int fontWidth, int fontHeight,
int x, int y, const char* text)
{
int color = 0, x0 = x;
for (int i = 0;; i++) {
int c = (int)(unsigned char)text[i];
if (c == 0) break;
if (c == '\n') {
x = x0;
y += fontHeight;
} else if (c == ' ') {
x += fontWidth;
} else if (c >= 0x10 && c < 0x20) {
color = c & 0xF;
} else {
const int key = c | (color << 8);
auto it = cache.find(key);
if (it != cache.end()) {
applyTexture(x, y, const_cast<TexturePtr&>(it->second), renderer);
x += fontWidth;
}
}
}
}
//Show a fake never-ending "ls -la" screen unless the user press Ctrl+C.
bool easterEggScreen(ImageManager& imageManager, SDL_Renderer& renderer) {
//Some colors.
SDL_Color colors[] = {
{ 0xC0, 0xC0, 0xC0, 0xFF }, //lightgray
{ 0x00, 0xFF, 0x00, 0xFF }, //green
{ 0x00, 0x00, 0xFF, 0xFF }, //blue
{ 0x00, 0xFF, 0xFF, 0xFF }, //cyan
{ 0xFF, 0x00, 0xFF, 0xFF }, //magenta
};
const int numberOfColors = sizeof(colors) / sizeof(colors[0]);
int fontWidth = 0;
TTF_GlyphMetrics(fontMono, 'W', NULL, NULL, NULL, NULL, &fontWidth);
//Initialize some textures.
std::map<int, TexturePtr> cache;
for (int i = 0; i < numberOfColors; i++) {
for (int c = 33; c <= 126; c++) {
const char s[2] = { (char)c, 0 };
const int key = c | (i << 8);
cache[key] = textureFromText(renderer, *fontMono, s, colors[i]);
}
}
const char* extensions[] = {
"\x11sh", "\x11py",
"\x14png", "\x14jpg",
"txt", "c", "cpp", "h", "map", "lst", "lua",
};
const int numberOfExtensions = sizeof(extensions) / sizeof(extensions[0]);
const char* users[] = {
"root", "user", "me", "shadow"
};
const int numberOfUsers = sizeof(users) / sizeof(users[0]);
const char* months[12] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
};
const int numOfDays[12] = {
31, 28, 31, 30, 31, 30,
31, 31, 30, 31, 30, 31,
};
const int fontHeight = TTF_FontHeight(fontMono);
//Keep the last resize event, this is to only process one.
SDL_Event lastResize = {};
bool ret = false, isRunning = true;
char s0[72] = {}, s1[72] = {}, s2[256] = {};
for (int i = 0; i < 60; i++) {
s0[i] = int(float(rand()) / float(randMaxPlusOne) * 15.0f);
}
if (getSettings()->getBoolValue("music")) {
fakeSoundEffectState.state = int(float(rand()) / float(randMaxPlusOne) * 80.0f);
fakeSoundEffectState.randContext = rand() ^ (rand() << 16);
Mix_SetPostMix(fakeSoundEffect, &fakeSoundEffectState);
}
for (int t = 0; isRunning; t++) {
while (SDL_PollEvent(&event)) {
//Check if we need to quit, if so enter the exit state.
if (event.type == SDL_QUIT){
setNextState(STATE_EXIT);
isRunning = false;
}
//Check for a resize event.
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
lastResize = event;
continue;
}
//Check Ctrl+C.
if (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_c
&& (event.key.keysym.mod & KMOD_CTRL) != 0 && (event.key.keysym.mod & ~KMOD_CTRL) == 0)
{
ret = true;
isRunning = false;
}
//Set the cursor type to the default one, the GUI can change that if needed.
currentCursor = CURSOR_POINTER;
//Let the input manager handle the events.
inputMgr.updateState(true);
}
//Process the resize event.
if (lastResize.type == SDL_WINDOWEVENT){
//TODO - used to be SDL_VIDEORESIZE
// so this may trigger on more events than intended
event = lastResize;
onVideoResize(imageManager, renderer);
//After resize we erase the event type
//TODO - used to be SDL_NOEVENT
lastResize.type = SDL_FIRSTEVENT;
}
//update input state (??)
inputMgr.updateState(false);
//Don't update the screen when the sound glitches.
if (fakeSoundEffectState.state >> 8) {
SDL_Delay(1000 / FPS);
continue;
}
//Clear the screen.
SDL_SetRenderDrawColor(&renderer, 0, 0, 0, 255);
SDL_RenderClear(&renderer);
const int rows = SCREEN_HEIGHT / fontHeight - 1;
for (int row = 0; row < rows; row++) {
//Generate some random text.
int m = int(float(rand()) / float(randMaxPlusOne) * 56.0f);
int carry = 0;
for (int i = 0; i < 60; i++) {
int c = s0[59 - i] + carry;
if (i <= m) c += int(float(rand()) / float(randMaxPlusOne) * 15.0f);
carry = 0;
while (c >= 15) {
c -= 15;
carry++;
}
s0[59 - i] = c;
}
int lp;
for (lp = 0; s0[lp]; lp++) {
char c = s0[lp] - 4;
if (c >= 0 && c < 10) {
s1[lp] = c + '0';
} else if (c == 10) {
s1[lp] = '_';
} else {
break;
}
}
s1[lp] = 0;
if (lp < 60) s0[lp] = 4;
//Choose a random extension.
int extension = int(float(rand()) / float(randMaxPlusOne) * 20.0f);
const char* ext = NULL;
int color = 0;
if (extension < numberOfExtensions) {
ext = extensions[extension];
if (ext[0] >= 0x10 && ext[0] < 0x20) {
color = ext[0] & 0xF;
ext++;
}
}
if (ext) {
s1[lp] = '.';
s1[lp + 1] = 0;
strcat(s1 + lp, ext);
lp = strlen(s1);
}
//Choose a random color.
if (extension >= numberOfExtensions) {
int r = int(float(rand()) / float(randMaxPlusOne) * 10.0f);
if (r <= 2) color = r;
}
bool isLink = int(float(rand()) / float(randMaxPlusOne) * 10.0f) == 0;
//Choose a random user.
const char* user = users[int(float(rand()) / float(randMaxPlusOne) * float(numberOfUsers))];
//Choose a random permission
const char* permission = NULL;
switch (int(float(rand()) / float(randMaxPlusOne) * 10.0f)) {
case 0:
permission = (color == 1 || color == 2) ? "rwxrwxrwx" : "rw-rw-rw-";
break;
case 1:
permission = (color == 1 || color == 2) ? "rwx------" : "rw-------";
break;
default:
permission = (color == 1 || color == 2) ? "rwxr-xr-x" : "rw-r--r--";
break;
}
//Choose a random size
int size = 0;
if (isLink) {
size = 3 + lp;
} else if (color == 2) {
size = 4096;
} else {
size = int(float(rand()) / float(randMaxPlusOne) * 10000.0f);
}
int num = 1;
if (color == 2) {
num = int(float(rand()) / float(randMaxPlusOne) * 10.0f);
}
//Choose a random date
char date[8];
{
int d = int(float(rand()) / float(randMaxPlusOne) * 365.0f);
int m = 0;
while (d >= numOfDays[m]) {
d -= numOfDays[m];
m++;
}
sprintf(date, "%s %2d", months[m], d + 1);
}
//Choose a random year or time
char year[8];
if (int(float(rand()) / float(randMaxPlusOne) * 10.0f) == 0) {
sprintf(year, "%d", 1970 + int(float(rand()) / float(randMaxPlusOne) * 100.0f));
} else {
sprintf(year, "%02d:%02d", int(float(rand()) / float(randMaxPlusOne) * 24.0f), int(float(rand()) / float(randMaxPlusOne) * 60.0f));
}
//Put them together
if (isLink) {
sprintf(s2, "l%s %d %-6s %-6s %4d %s %5s \x13.%s\x10 -> %c../%s",
permission, num, user, user, size, date, year, s1, 0x10 + color, s1
);
} else {
sprintf(s2, "%c%s %d %-6s %-6s %4d %s %5s %c.%s",
color == 2 ? 'd' : '-', permission, num, user, user, size, date, year, 0x10 + color, s1
);
}
//Show text
scamDrawText(imageManager, renderer, cache, fontWidth, fontHeight, 0, row * fontHeight, s2);
}
//Show a caret.
if (t & 0x10) {
SDL_Rect r = { 0, rows * fontHeight, fontWidth, fontHeight };
SDL_SetRenderDrawColor(&renderer, 0x80, 0xFF, 0, 0xFF);
SDL_RenderDrawRect(&renderer, &r);
}
//display it
flipScreen(renderer);
SDL_Delay(1000 / FPS);
}
Mix_SetPostMix(NULL, NULL);
return ret;
}
#else
// Only play a sound.
bool easterEggScreen(ImageManager& imageManager, SDL_Renderer& renderer) {
//play a sound effect
getSoundManager()->playSound("hit");
return true;
}
#endif

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