Function IsPointWithinClx

Source/engine/render/clx_render.cpp:464–515

}

bool IsPointWithinClx(Point position, ClxSprite clx)
{
	const uint8_t *src = clx.pixelData();
	const uint8_t *end = src + clx.pixelDataSize();
	const uint16_t width = clx.width();

	int xCur = 0;
	int yCur = clx.height() - 1;
	while (src < end) {
		if (yCur != position.y) {
			SkipSize skipSize {};
			skipSize.xOffset = xCur;
			src = SkipRestOfLineWithOverrun(src, width, skipSize);
			yCur -= skipSize.wholeLines;
			xCur = skipSize.xOffset;
			if (yCur < position.y)
				return false;
			continue;
		}

		while (xCur < width) {
			uint8_t val = *src++;
			if (!IsClxOpaque(val)) {
				// ignore transparent
				xCur += val;
				if (xCur > position.x)
					return false;
				continue;
			}

			if (IsClxOpaqueFill(val)) {
				val = GetClxOpaqueFillWidth(val);
				const uint8_t color = *src++;
				if (xCur <= position.x && position.x < xCur + val)
					return color != 0; // ignore shadows
				xCur += val;
			} else {
				val = GetClxOpaquePixelsWidth(val);
				for (uint8_t pixel = 0; pixel < val; pixel++) {
					const uint8_t color = *src++;
					if (xCur == position.x)
						return color != 0; // ignore shadows
					xCur++;
				}
			}
		}

		return false;
	}

	return false;
}

std::pair<int, int> ClxMeasureSolidHorizontalBounds(ClxSprite clx)
{