Function ILAPIENTRY ilDefaultImage

DevIL/src-IL/src/il_manip.cpp:807–863

Creates an ugly 64x64 black and yellow checkerboard image.

//! Creates an ugly 64x64 black and yellow checkerboard image.
ILboolean ILAPIENTRY ilDefaultImage()
{
	ILubyte *TempData;
	ILubyte Yellow[3] = { 18, 246, 243 };
	ILubyte Black[3]  = { 0, 0, 0 };
	ILubyte *ColorPtr = Yellow;  // The start color
	ILboolean Color = IL_TRUE;

	// Loop Variables
	ILint v, w, x, y;

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

	if (!ilTexImage(64, 64, 1, 3, IL_BGR, IL_UNSIGNED_BYTE, NULL)) {
		return IL_FALSE;
	}
	iCurImage->Origin = IL_ORIGIN_LOWER_LEFT;
	TempData = iCurImage->Data;

	for (v = 0; v < 8; v++) {
		// We do this because after a "block" line ends, the next row of blocks
		// above starts with the ending colour, but the very inner loop switches them.
		if (Color) {
			Color = IL_FALSE;
			ColorPtr = Black;
		}
		else {
			Color = IL_TRUE;
			ColorPtr = Yellow;
		}

		for (w = 0; w < 8; w++) {
			for (x = 0; x < 8; x++) {
				for (y = 0; y < 8; y++, TempData += iCurImage->Bpp) {
					TempData[0] = ColorPtr[0];
					TempData[1] = ColorPtr[1];
					TempData[2] = ColorPtr[2];
				}

				// Switch to alternate between black and yellow
				if (Color) {
					Color = IL_FALSE;
					ColorPtr = Black;
				}
				else {
					Color = IL_TRUE;
					ColorPtr = Yellow;
				}
			}
		}
	}

	return IL_TRUE;
}