// Internal function used to save the Sgi.
ILboolean iSaveSgiInternal()
{
ILuint i, c;
ILboolean Compress;
ILimage *Temp = iCurImage;
ILubyte *TempData;
if (iCurImage == NULL) {
ilSetError(IL_ILLEGAL_OPERATION);
return IL_FALSE;
}
if (iCurImage->Format != IL_LUMINANCE
//while the sgi spec doesn't directly forbid rgb files with 2
//channels, they are quite uncommon and most apps don't support
//them. so convert lum_a images to rgba before writing.
//&& iCurImage->Format != IL_LUMINANCE_ALPHA
&& iCurImage->Format != IL_RGB
&& iCurImage->Format != IL_RGBA) {
if (iCurImage->Format == IL_BGRA || iCurImage->Format == IL_LUMINANCE_ALPHA)
Temp = iConvertImage(iCurImage, IL_RGBA, DetermineSgiType(iCurImage->Type));
else
Temp = iConvertImage(iCurImage, IL_RGB, DetermineSgiType(iCurImage->Type));
}
else if (iCurImage->Type > IL_UNSIGNED_SHORT) {
Temp = iConvertImage(iCurImage, iCurImage->Format, DetermineSgiType(iCurImage->Type));
}
//compression of images with 2 bytes per channel doesn't work yet
Compress = iGetInt(IL_SGI_RLE) && Temp->Bpc == 1;
if (Temp == NULL)
return IL_FALSE;
SaveBigUShort(SGI_MAGICNUM); // 'Magic' number
if (Compress)
iputc(1);
else
iputc(0);
if (Temp->Type == IL_UNSIGNED_BYTE)
iputc(1);
else if (Temp->Type == IL_UNSIGNED_SHORT)
iputc(2);
// Need to error here if not one of the two...
if (Temp->Format == IL_LUMINANCE || Temp->Format == IL_COLOUR_INDEX)
SaveBigUShort(2);
else
SaveBigUShort(3);
SaveBigUShort((ILushort)Temp->Width);
SaveBigUShort((ILushort)Temp->Height);
SaveBigUShort((ILushort)Temp->Bpp);
switch (Temp->Type)
{
case IL_BYTE:
SaveBigInt(SCHAR_MIN); // Minimum pixel value
SaveBigInt(SCHAR_MAX); // Maximum pixel value
break;
case IL_UNSIGNED_BYTE:
SaveBigInt(0); // Minimum pixel value
SaveBigInt(UCHAR_MAX); // Maximum pixel value
break;
case IL_SHORT:
SaveBigInt(SHRT_MIN); // Minimum pixel value
SaveBigInt(SHRT_MAX); // Maximum pixel value
break;
case IL_UNSIGNED_SHORT:
SaveBigInt(0); // Minimum pixel value
SaveBigInt(USHRT_MAX); // Maximum pixel value
break;
}
SaveBigInt(0); // Dummy value
if (FName) {
c = ilCharStrLen(FName);
c = c < 79 ? 79 : c;
iwrite(FName, 1, c);
c = 80 - c;
for (i = 0; i < c; i++) {
iputc(0);
}
}
else {
for (i = 0; i < 80; i++) {
iputc(0);
}
}
SaveBigUInt(0); // Colormap
// Padding
for (i = 0; i < 101; i++) {
SaveLittleInt(0);
}
if (iCurImage->Origin == IL_ORIGIN_UPPER_LEFT) {
TempData = iGetFlipped(Temp);
if (TempData == NULL) {
if (Temp!= iCurImage)
ilCloseImage(Temp);
return IL_FALSE;
}
}
else {
TempData = Temp->Data;
}
if (!Compress) {
for (c = 0; c < Temp->Bpp; c++) {
for (i = c; i < Temp->SizeOfData; i += Temp->Bpp) {
iputc(TempData[i]); // Have to save each colour plane separately.
}
}
}
else {
iSaveRleSgi(TempData, Temp->Width, Temp->Height, Temp->Bpp, Temp->Bps);
}
if (TempData != Temp->Data)
ifree(TempData);
if (Temp != iCurImage)
ilCloseImage(Temp);
return IL_TRUE;
}
// Internal function used to save the Sgi.
ILboolean iSaveSgiInternal()
{
ILuint i, c;
ILboolean Compress;
ILimage *Temp = iCurImage;
ILubyte *TempData;
Compress = iGetInt(IL_SGI_RLE);
if (iCurImage == NULL) {
ilSetError(IL_ILLEGAL_OPERATION);
return IL_FALSE;
}
if (iCurImage->Format != IL_RGB && iCurImage->Format != IL_RGBA) {
if (iCurImage->Format == IL_BGRA)
Temp = iConvertImage(iCurImage, IL_RGBA, DetermineSgiType(iCurImage->Type));
else
Temp = iConvertImage(iCurImage, IL_RGB, DetermineSgiType(iCurImage->Type));
}
else if (iCurImage->Type > IL_UNSIGNED_SHORT) {
Temp = iConvertImage(iCurImage, iCurImage->Format, DetermineSgiType(iCurImage->Type));
}
if (Temp == NULL)
return IL_FALSE;
SaveBigUShort(SGI_MAGICNUM); // 'Magic' number
if (Compress)
iputc(1);
else
iputc(0);
if (Temp->Type == IL_UNSIGNED_BYTE)
iputc(1);
else if (Temp->Type == IL_UNSIGNED_SHORT)
iputc(2);
// Need to error here if not one of the two...
if (Temp->Format == IL_LUMINANCE || Temp->Format == IL_COLOUR_INDEX)
SaveBigUShort(2);
else
SaveBigUShort(3);
SaveBigUShort((ILushort)Temp->Width);
SaveBigUShort((ILushort)Temp->Height);
SaveBigUShort((ILushort)Temp->Bpp);
switch (Temp->Type)
{
case IL_BYTE:
SaveBigInt(SCHAR_MIN); // Minimum pixel value
SaveBigInt(SCHAR_MAX); // Maximum pixel value
break;
case IL_UNSIGNED_BYTE:
SaveBigInt(0); // Minimum pixel value
SaveBigInt(UCHAR_MAX); // Maximum pixel value
break;
case IL_SHORT:
SaveBigInt(SHRT_MIN); // Minimum pixel value
SaveBigInt(SHRT_MAX); // Maximum pixel value
break;
case IL_UNSIGNED_SHORT:
SaveBigInt(0); // Minimum pixel value
SaveBigInt(USHRT_MAX); // Maximum pixel value
break;
}
SaveBigInt(0); // Dummy value
if (FName) {
c = strlen(FName);
c = c < 79 ? 79 : c;
iwrite(FName, 1, c);
c = 80 - c;
for (i = 0; i < c; i++) {
iputc(0);
}
}
else {
for (i = 0; i < 80; i++) {
iputc(0);
}
}
SaveBigUInt(0); // Colormap
// Padding
for (i = 0; i < 101; i++) {
SaveLittleInt(0);
}
if (iCurImage->Origin == IL_ORIGIN_UPPER_LEFT) {
TempData = iGetFlipped(Temp);
if (TempData == NULL) {
if (Temp!= iCurImage)
ilCloseImage(Temp);
return IL_FALSE;
}
}
else {
TempData = Temp->Data;
}
if (!Compress) {
for (c = 0; c < Temp->Bpp; c++) {
for (i = c; i < Temp->SizeOfData; i += Temp->Bpp) {
iputc(TempData[i]); // Have to save each colour plane separately.
}
}
}
else {
iSaveRleSgi(TempData);
}
if (TempData != Temp->Data)
ifree(TempData);
if (Temp != iCurImage)
ilCloseImage(Temp);
return IL_TRUE;
}
