CImage *CImageYCbCrtoRGB(CImage *cimg)
{
CImage *ncimg=NULL;
int p,n,i;
ncimg = CreateCImage(cimg->C[0]->ncols,cimg->C[0]->nrows);
n = ncimg->C[0]->ncols*ncimg->C[0]->nrows;
for (p=0; p < n; p++){
i = triplet(cimg->C[0]->val[p],cimg->C[1]->val[p],cimg->C[2]->val[p]);
i = YCbCr2RGB(i);
ncimg->C[0]->val[p]=t0(i);
ncimg->C[1]->val[p]=t1(i);
ncimg->C[2]->val[p]=t2(i);
}
return(ncimg);
}
ILboolean iLoadPcdInternal()
{
ILubyte VertOrientation;
ILuint Width, Height, i, Total, x, CurPos = 0;
ILubyte *Y1=NULL, *Y2=NULL, *CbCr=NULL, r = 0, g = 0, b = 0;
ILuint PicNum;
if (iCurImage == NULL) {
ilSetError(IL_ILLEGAL_OPERATION);
return IL_FALSE;
}
iseek(72, IL_SEEK_CUR);
if (iread(&VertOrientation, 1, 1) != 1)
return IL_FALSE;
iseek(-72, IL_SEEK_CUR); // Can't rewind
PicNum = iGetInt(IL_PCD_PICNUM);
switch (PicNum)
{
case 0:
iseek(0x02000, IL_SEEK_CUR);
Width = 192;
Height = 128;
break;
case 1:
iseek(0x0b800, IL_SEEK_CUR);
Width = 384;
Height = 256;
break;
case 2:
iseek(0x30000, IL_SEEK_CUR);
Width = 768;
Height = 512;
break;
default:
ilSetError(IL_INVALID_PARAM);
return IL_FALSE;
}
if (itell() == IL_EOF) // Supposed to have data here.
return IL_FALSE;
Y1 = (ILubyte*)ialloc(Width);
Y2 = (ILubyte*)ialloc(Width);
CbCr = (ILubyte*)ialloc(Width);
if (Y1 == NULL || Y2 == NULL || CbCr == NULL) {
ifree(Y1);
ifree(Y2);
ifree(CbCr);
return IL_FALSE;
}
if (!ilTexImage(Width, Height, 1, 3, IL_RGB, IL_UNSIGNED_BYTE, NULL)) {
return IL_FALSE;
}
iCurImage->Origin = IL_ORIGIN_LOWER_LEFT;
Total = Height >> 1;
for (i = 0; i < Total; i++) {
iread(Y1, 1, Width);
iread(Y2, 1, Width);
if (iread(CbCr, 1, Width) != Width) { // Only really need to check the last one.
ifree(Y1);
ifree(Y2);
ifree(CbCr);
return IL_FALSE;
}
for (x = 0; x < Width; x++) {
YCbCr2RGB(Y1[x], CbCr[x / 2], CbCr[(Width / 2) + (x / 2)], &r, &g, &b);
iCurImage->Data[CurPos++] = r;
iCurImage->Data[CurPos++] = g;
iCurImage->Data[CurPos++] = b;
}
for (x = 0; x < Width; x++) {
YCbCr2RGB(Y2[x], CbCr[x / 2], CbCr[(Width / 2) + (x / 2)], &r, &g, &b);
iCurImage->Data[CurPos++] = r;
iCurImage->Data[CurPos++] = g;
iCurImage->Data[CurPos++] = b;
}
}
ifree(Y1);
ifree(Y2);
ifree(CbCr);
// Not sure how it is...the documentation is hard to understand
if ((VertOrientation & 0x3F) != 8)
iCurImage->Origin = IL_ORIGIN_LOWER_LEFT;
else
iCurImage->Origin = IL_ORIGIN_UPPER_LEFT;
return ilFixImage();
}
