void Texture::vFlipImage(
unsigned char *pImage,
bool boFlipHorizontal,
bool boFlipVertical,
unsigned short width, //GLushort width,
unsigned short height, //GLushort height,
unsigned char bpp //GLbyte bpp
)
/*
Written: 21 Mar. 2010: JH
Purpose: The image might come out flipped, so we flip it back
*/
{
unsigned char // GLbyte
m_iBpp = bpp / 8;
if (boFlipHorizontal){
for (int h = 0; h < height; h++) {
for (int w = 0; w < width / 2; w++){
vSwap(pImage + (h * width + w) * m_iBpp, pImage + (h * width + width - w - 1)* m_iBpp, m_iBpp);
}
}
}
if (boFlipVertical){
for (int w = 0; w < width; w++){
for (int h = 0; h < height / 2; h++) {
vSwap(pImage + (h * width + w) * m_iBpp, pImage + ((height - h - 1) * width + w)* m_iBpp, m_iBpp);
}
}
}
}
void m_rc4_init (BYTE *D, unsigned char *key, int keylen) {
BYTE *S = D+8;
unsigned char T[256];
int i, j=0;
// Initialization of the state vector S
for (i=0; i < 256; i++) {
S[i] = i;
T[i] = key[i % keylen];
}
// Initial permutation of S using the key
for (i=0; i < 256; i++) {
j = (j + S[i] + T[i]) % 256;
vSwap (S, i, j);
}
// Initialize initial i and j
int *p_int = (int *)D;
*p_int = 0;
*(p_int+1) = 0;
return;
}
BYTE m_rc4_gen(BYTE *D) {
BYTE *S = D+8;
int i, j, t;
BYTE obyte;
int *p_int = (int *)D;
// Initialization of i and j
i = *p_int;
j = *(p_int+1);
// Generate one byte of the PSRN stream
i = (i+1) % 256;
j = (j + S[i]) % 256;
vSwap(S, i, j);
t = (S[i] + S[j]) % 256;
obyte = S[t];
// Set the new values of i and j into the input vector
*p_int = i;
*(p_int+1) = j;
return (obyte);
}
