Function ILAPIENTRY ilActiveLayer

DevIL/src-IL/src/il_stack.cpp:420–455

Used for setting the current layer if layers exist.

//! Used for setting the current layer if layers exist.
ILboolean ILAPIENTRY ilActiveLayer(ILuint Number)
{
	ILuint Current;
    ILimage *iTempImage;

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

	if (Number == 0) {
		return IL_TRUE;
	}

    iTempImage = iCurImage;
	iCurImage = iCurImage->Layers;
	if (iCurImage == NULL) {
		iCurImage = iTempImage;
		ilSetError(IL_ILLEGAL_OPERATION);
		return IL_FALSE;
	}

	//Number--;  // Skip 0 (parent image)
	for (Current = 1; Current < Number; Current++) {
		iCurImage = iCurImage->Layers;
		if (iCurImage == NULL) {
			ilSetError(IL_ILLEGAL_OPERATION);
			iCurImage = iTempImage;
			return IL_FALSE;
		}
	}

	ParentImage = IL_FALSE;

	return IL_TRUE;
}


ILuint ILAPIENTRY ilCreateSubImage(ILenum Type, ILuint Num)