Function iLoadSunInternal

DevIL/src-IL/src/il_sun.cpp:199–359

ILboolean iLoadSunInternal(void)
{
	SUNHEAD	Header;
	BITFILE	*File;
	ILuint	i, j, Padding, Offset, BytesRead;
	ILubyte	PaddingData[16];

	if (iCurImage == NULL) {
		ilSetError(IL_ILLEGAL_OPERATION);
		return IL_FALSE;
	}

	//@TODO: Right now, iGetSunHead cannot fail.
	if (!iGetSunHead(&Header) || !iCheckSun(&Header)) {
		ilSetError(IL_INVALID_FILE_HEADER);
		return IL_FALSE;
	}

	switch (Header.Depth)
	{
		case 1:  //@TODO: Find a file to test this on.
			File = bfile(iGetFile());
			if (File == NULL)
				return IL_FALSE;

			if (!ilTexImage(Header.Width, Header.Height, 1, 1, IL_COLOUR_INDEX, IL_UNSIGNED_BYTE, NULL))
				return IL_FALSE;
			if (Header.ColorMapLength != 0) {
				// Data should be an index into the color map, but the color map should only be RGB (6 bytes, 2 entries).
				if (Header.ColorMapLength != 6) {
					ilSetError(IL_INVALID_FILE_HEADER);
					return IL_FALSE;
				}
			}
			iCurImage->Pal.Palette = (ILubyte*)ialloc(6);  // Just need 2 entries in the color map.
			if (Header.ColorMapLength == 0) {  // Create the color map
				iCurImage->Pal.Palette[0] = 0x00;  // Entry for black
				iCurImage->Pal.Palette[1] = 0x00;
				iCurImage->Pal.Palette[2] = 0x00;
				iCurImage->Pal.Palette[3] = 0xFF;  // Entry for white
				iCurImage->Pal.Palette[4] = 0xFF;
				iCurImage->Pal.Palette[5] = 0xFF;
			}
			else {
				iread(iCurImage->Pal.Palette, 1, 6);  // Read in the color map.
			}
			iCurImage->Pal.PalSize = 6;
			iCurImage->Pal.PalType = IL_PAL_RGB24;

			Padding = (16 - (iCurImage->Width % 16)) % 16;  // Has to be aligned on a 16-bit boundary.  The rest is padding.

			// Reads the bits
			for (i = 0; i < iCurImage->Height; i++) {
				bread(&iCurImage->Data[iCurImage->Width * i], 1, iCurImage->Width, File);
				//bseek(File, BitPadding, IL_SEEK_CUR);  //@TODO: This function does not work correctly.
				bread(PaddingData, 1, Padding, File);  // Skip padding bits.
			}
			break;