/**
\return 1 on success, 0 on failure
\brief Test a U_BITMAPINFO object.
\param Bmi pointer to a U_BITMAPINFO object.
\param blimit one byte past the end of the record.
*/
int bitmapinfo_safe(
const char *Bmi,
const char *blimit
){
int ClrUsed;
if(IS_MEM_UNSAFE(Bmi, offsetof(U_BITMAPINFO,bmiHeader) + sizeof(U_BITMAPINFOHEADER), blimit))return(0);
ClrUsed = get_real_color_count(Bmi + offsetof(U_BITMAPINFO,bmiHeader));
if(ClrUsed && IS_MEM_UNSAFE(Bmi, offsetof(U_BITMAPINFO,bmiColors) + ClrUsed*sizeof(U_RGBQUAD), blimit))return(0);
return(1);
}
int e2s_get_DIB_params(PU_BITMAPINFO Bmi, const U_RGBQUAD **ct, uint32_t *numCt,
uint32_t *width, uint32_t *height, uint32_t *colortype,
uint32_t *invert) {
uint32_t bic;
/* if biCompression is not U_BI_RGB some or all of the following might not
* hold real values */
PU_BITMAPINFOHEADER Bmih = &(Bmi->bmiHeader);
bic = Bmih->biCompression;
*width = Bmih->biWidth;
*colortype = Bmih->biBitCount;
if (Bmih->biHeight < 0) {
*height = -Bmih->biHeight;
*invert = 1;
} else {
*height = Bmih->biHeight;
*invert = 0;
}
if (bic == U_BI_RGB) {
*numCt = get_real_color_count((const char *)Bmih);
if (numCt) {
*ct = (PU_RGBQUAD)((char *)Bmi + sizeof(U_BITMAPINFOHEADER));
} else {
*ct = NULL;
}
} else if (bic ==
U_BI_BITFIELDS) { /* to date only encountered once, for 32 bit,
from PPT*/
*numCt = 0;
*ct = NULL;
bic = U_BI_RGB; /* there seems to be no difference, at least for the 32
bit images */
} else {
*numCt = Bmih->biSizeImage;
*ct = NULL;
}
return (bic);
}
