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rockbox/apps/plugins/matrix.c
Nils Wallménius c80f6dad30 Fix out of bounds accesses in keybox and matrix 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22191 a1c6a512-1295-4272-9138-f99709370657
2009-08-06 19:02:59 +00:00

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 1999 Chris Allegretta
* Copyright (C) 2005 Alastair S - ported to podzilla
* Copyright (C) 2005 Jonas Häggqvist - ported to rockbox
*
*
* 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.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/*
* TODO:
* - The font is a bit large, create smaller one
* - For colour/greyscale displays, the font from the xscreensaver xmatrix
* should be converted and used
* BUGS:
* - The animation "dies" after a few seconds, not sure why. Works in sim.
* Symtom Fixed Oct 2007 GRaTT (Gerritt Gonzales)
*/
#include "plugin.h"
PLUGIN_HEADER
/* Images */
#define MAXCHARS 27 - 1
extern const fb_data matrix_bold[];
extern const fb_data matrix_normal[];
#define COL_W 14
#define COL_H 15
#define COLS LCD_WIDTH/COL_W
#define ROWS LCD_HEIGHT/COL_H
#define LEFTMARGIN (LCD_WIDTH-(COLS*COL_W))/2
#define TOPMARGIN (LCD_HEIGHT-(ROWS*COL_H))/2
#if (CONFIG_KEYPAD == IPOD_4G_PAD) || \
(CONFIG_KEYPAD == IPOD_3G_PAD) || \
(CONFIG_KEYPAD == IPOD_1G2G_PAD)
#define MATRIX_EXIT BUTTON_MENU
#define MATRIX_SLEEP_MORE BUTTON_SCROLL_BACK|BUTTON_REPEAT
#define MATRIX_SLEEP_LESS BUTTON_SCROLL_FWD|BUTTON_REPEAT
#define MATRIX_PAUSE BUTTON_PLAY
#elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
(CONFIG_KEYPAD == IRIVER_H300_PAD)
#define MATRIX_EXIT BUTTON_OFF
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_SELECT
#elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
#define MATRIX_EXIT BUTTON_POWER
#define MATRIX_SLEEP_MORE BUTTON_SCROLL_UP|BUTTON_REPEAT
#define MATRIX_SLEEP_LESS BUTTON_SCROLL_DOWN|BUTTON_REPEAT
#define MATRIX_PAUSE BUTTON_PLAY
#elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD)
#define MATRIX_EXIT BUTTON_POWER
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_PLAY
#elif (CONFIG_KEYPAD == GIGABEAT_PAD)
#define MATRIX_EXIT BUTTON_POWER
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_SELECT
#elif CONFIG_KEYPAD == SANSA_E200_PAD
#define MATRIX_EXIT BUTTON_POWER
#define MATRIX_SLEEP_MORE BUTTON_SCROLL_BACK|BUTTON_REPEAT
#define MATRIX_SLEEP_LESS BUTTON_SCROLL_FWD|BUTTON_REPEAT
#define MATRIX_PAUSE BUTTON_SELECT
#elif CONFIG_KEYPAD == SANSA_FUZE_PAD
#define MATRIX_EXIT (BUTTON_HOME|BUTTON_REPEAT)
#define MATRIX_SLEEP_MORE BUTTON_SCROLL_BACK|BUTTON_REPEAT
#define MATRIX_SLEEP_LESS BUTTON_SCROLL_FWD|BUTTON_REPEAT
#define MATRIX_PAUSE BUTTON_SELECT
#elif CONFIG_KEYPAD == SANSA_C200_PAD
#define MATRIX_EXIT BUTTON_POWER
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_SELECT
#elif (CONFIG_KEYPAD == GIGABEAT_S_PAD)
#define MATRIX_EXIT BUTTON_BACK
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_SELECT
#elif CONFIG_KEYPAD == IAUDIO_M3_PAD
#define MATRIX_EXIT BUTTON_RC_REC
#define MATRIX_SLEEP_MORE BUTTON_RC_VOL_UP
#define MATRIX_SLEEP_LESS BUTTON_RC_VOL_DOWN
#define MATRIX_PAUSE BUTTON_RC_PLAY
#elif (CONFIG_KEYPAD == COWOND2_PAD)
#define MATRIX_EXIT BUTTON_POWER
#elif CONFIG_KEYPAD == IAUDIO67_PAD
#define MATRIX_EXIT BUTTON_POWER
#define MATRIX_SLEEP_MORE BUTTON_VOLUP
#define MATRIX_SLEEP_LESS BUTTON_VOLDOWN
#define MATRIX_PAUSE BUTTON_PLAY
#elif CONFIG_KEYPAD == CREATIVEZVM_PAD
#define MATRIX_EXIT BUTTON_BACK
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_PLAY
#elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
#define MATRIX_EXIT BUTTON_POWER
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_SELECT
#elif (CONFIG_KEYPAD == ONDAVX747_PAD) || CONFIG_KEYPAD == MROBE500_PAD
#define MATRIX_EXIT BUTTON_POWER
#elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
#define MATRIX_EXIT BUTTON_REC
#define MATRIX_SLEEP_MORE BUTTON_UP
#define MATRIX_SLEEP_LESS BUTTON_DOWN
#define MATRIX_PAUSE BUTTON_PLAY
#else
#error Unsupported keypad
#endif
#ifdef HAVE_TOUCHSCREEN
#ifndef MATRIX_EXIT
#define MATRIX_EXIT BUTTON_TOPLEFT
#endif
#ifndef MATRIX_SLEEP_MORE
#define MATRIX_SLEEP_MORE BUTTON_MIDRIGHT
#endif
#ifndef MATRIX_SLEEP_LESS
#define MATRIX_SLEEP_LESS BUTTON_MIDLEFT
#endif
#ifndef MATRIX_PAUSE
#define MATRIX_PAUSE BUTTON_CENTER
#endif
#endif
#define SLEEP HZ/50
/* Each position is of this type */
typedef struct cmatrix {
int val;
int bold;
} cmatrix;
/* The matrix - who'd have guessed it was just a few hundred bytes? */
static cmatrix matrix[ROWS][COLS];
static int length[COLS];
static int spaces[COLS];
static int updates[COLS];
static void matrix_init(void) {
int i,j;
/* Seed rand */
rb->srand(*rb->current_tick);
/* Make the matrix */
for (i = 0; i <= ROWS; i++) {
for (j = 0; j <= COLS - 1; j++ ) {
matrix[i][j].val = -1;
matrix[i][j].bold = 0;
}
}
for (j = 0; j <= COLS - 1; j++) {
/* Set up spaces[] array of how many spaces to skip */
spaces[j] = rb->rand() % ROWS + 1;
/* And length of the stream */
length[j] = rb->rand() % (ROWS - 3) + 3;
/* Sentinel value for creation of new objects */
matrix[1][j].val = 129;
/* And set updates[] array for update speed. */
updates[j] = rb->rand() % 3 + 1;
}
}
static void matrix_blit_char(const int row, const int col, int cha)
{
if (cha == 129 || cha == 2 || cha > MAXCHARS)
cha = 0;
if (matrix[row][col].bold == 1) {
rb->lcd_bitmap_part(matrix_bold, cha*COL_W, 0, 392,
col*COL_W + LEFTMARGIN, row*COL_H + TOPMARGIN, COL_W, COL_H);
}
else {
rb->lcd_bitmap_part(matrix_normal, cha*COL_W, 0, 392,
col*COL_W + LEFTMARGIN, row*COL_H + TOPMARGIN, COL_W, COL_H);
}
}
static void matrix_loop(void)
{
int i, j = 0, y, z, firstcoldone = 0;
static int count = 0;
int randomness = 6;
count++;
if (count > 4)
count = 1;
for (j = 0; j <= COLS - 1; j++) {
if (count > updates[j]) {
/* New style scrolling */
if (matrix[0][j].val == -1 && matrix[1][j].val == 129
&& spaces[j] > 0) {
matrix[0][j].val = -1;
spaces[j]--;
} else if (matrix[0][j].val == -1 && matrix[1][j].val == 129){
length[j] = rb->rand() % (ROWS - 3) + 3;
matrix[0][j].val = rb->rand() % (MAXCHARS-1) + 1;
if (rb->rand() % 2 == 1)
matrix[0][j].bold = 2;
spaces[j] = rb->rand() % ROWS + 1;
}
i = 0;
y = 0;
firstcoldone = 0;
while (i <= ROWS) {
/* Skip over spaces */
/* this is whear the characters were disappearing */
/*
while (i <= ROWS && (matrix[i][j].val == 129 ||
matrix[i][j].val == -1))
i++;
*/
/* A little more random now for spaces */
if (rb->rand() % randomness == 1){
while (i <= ROWS && (matrix[i][j].val == 129 ||
matrix[i][j].val == -1)){
i++;
randomness--;
if(randomness <=1)
randomness = 6;}
}else{
randomness++;
if(randomness >6)
randomness = 6;
}
if (i > ROWS)
break;
/* Go to the head of this collumn */
z = i;
y = 0;
while (i <= ROWS && (matrix[i][j].val != 129 &&
matrix[i][j].val != -1)) {
i++;
y++;
}
if (i > ROWS) {
matrix[z][j].val = 129;
matrix[ROWS - 1][j].bold = 1;
matrix_blit_char(z - 1, j, matrix[z][j].val);
continue;
}
matrix[i][j].val = rb->rand() % (MAXCHARS-1) + 1;
if (matrix[i - 1][j].bold == 2) {
matrix[i - 1][j].bold = 1;
matrix[i][j].bold = 2;
}
/* If we're at the top of the collumn and it's reached its
* full length (about to start moving down), we do this
* to get it moving. This is also how we keep segments
* not already growing from growing accidentally =>
*/
if (y > length[j] || firstcoldone) {
matrix[z][j].val = 129;
matrix[0][j].val = -1;
}
firstcoldone = 1;
i++;
}
for (i = 1; i <= ROWS; i++) {
if (matrix[i][j].val == 0 || matrix[i][j].bold == 2) {
if (matrix[i][j].val == 0)
matrix_blit_char(i - 1, j, 20);
else
matrix_blit_char(i - 1, j, matrix[i][j].val);
} else {
if (matrix[i][j].val == 1)
matrix_blit_char(i - 1, j, 2);
else if (matrix[i][j].val == -1)
matrix_blit_char(i - 1, j, 129);
else
matrix_blit_char(i - 1, j, matrix[i][j].val);
}
}
}
}
}
enum plugin_status plugin_start(const void* parameter) {
int button;
int sleep = SLEEP;
bool frozen = false;
(void)parameter;
rb->lcd_set_background(LCD_BLACK);
rb->lcd_set_backdrop(NULL);
rb->lcd_clear_display();
matrix_init();
while (1) {
if (!frozen) {
matrix_loop();
rb->lcd_update();
rb->sleep(sleep);
}
button = rb->button_get(frozen);
switch(button) {
case MATRIX_PAUSE:
frozen = !frozen;
break;
case MATRIX_EXIT:
return PLUGIN_OK;
break;
case MATRIX_SLEEP_MORE:
/* Sleep longer */
sleep += SLEEP;
break;
case MATRIX_SLEEP_LESS:
/* Sleep less */
sleep -= SLEEP;
if (sleep < 0) sleep = 0;
break;
default:
if (rb->default_event_handler(button) == SYS_USB_CONNECTED) {
return PLUGIN_USB_CONNECTED;
}
break;
}
}
return PLUGIN_OK;
}
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