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jtlsrv-cpp/.static-build/include/vips/VRegion8.h

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+// VIPS region wrapper
+
+/*
+
+	This file is part of VIPS.
+
+	VIPS is free software; you can redistribute it and/or modify
+	it under the terms of the GNU Lesser General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Lesser General Public License for more details.
+
+	You should have received a copy of the GNU Lesser General Public License
+	along with this program; if not, write to the Free Software
+	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+	02110-1301  USA
+
+ */
+
+/*
+
+	These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
+
+ */
+
+#ifndef VIPS_VREGION_H
+#define VIPS_VREGION_H
+
+#include <vips/vips.h>
+
+VIPS_NAMESPACE_START
+
+/**
+ * A region of an image. Can be used to access raw pixel data.
+ * */
+class VRegion : public VObject {
+public:
+	/**
+	 * Create a VRegion that wraps a VipsRegion object. If steal
+	 * is STEAL, then this VRegion takes over ownership of the libvips
+	 * object and will automatically unref it.
+	 */
+	explicit VRegion(VipsRegion *region, VSteal steal = STEAL)
+		: VObject((VipsObject *) region, steal)
+	{
+	}
+
+	/**
+	 * Create a VRegion from an image.
+	 */
+	static VRegion
+	new_from_image(VImage image);
+
+	/**
+	 * Get a pointer to the underlying VipsRegion object.
+	 */
+	VipsRegion *
+	get_region() const
+	{
+		return (VipsRegion *) VObject::get_object();
+	}
+
+	/**
+	 * Prepare the region from VipsRect.
+	 */
+	void
+	prepare(const VipsRect *rect) const
+	{
+		if (vips_region_prepare(get_region(), rect))
+			throw VError();
+	}
+
+	/**
+	 * Prepare the region from rectangle coordinates.
+	 */
+	void
+	prepare(int left, int top, int width, int height) const
+	{
+		VipsRect rect = { left, top, width, height };
+
+		prepare(&rect);
+	}
+
+	/**
+	 * Get valid bounds of the region.
+	 */
+	VipsRect
+	valid() const
+	{
+		return get_region()->valid;
+	}
+
+	/**
+	 * Get pointer to the start of the region.
+	 */
+	VipsPel *
+	addr() const
+	{
+		return addr(0);
+	}
+
+	/**
+	 * Get pointer at the given index of the region.
+	 */
+	VipsPel *
+	addr(size_t i) const
+	{
+		return &VIPS_REGION_ADDR_TOPLEFT(get_region())[i];
+	}
+
+	/**
+	 * Get pointer at the given coordinates of the region.
+	 */
+	VipsPel *
+	addr(int x, int y) const
+	{
+		return VIPS_REGION_ADDR(get_region(), x, y);
+	}
+
+	/**
+	 * Get the stride (bytes per row, including padding) of the region.
+	 */
+	size_t
+	stride() const
+	{
+		return VIPS_REGION_LSKIP(get_region());
+	}
+
+	/**
+	 * Get VipsPel at the given index of the region.
+	 */
+	VipsPel
+	operator[](size_t i) const
+	{
+		return *addr(i);
+	}
+
+	/**
+	 * Get VipsPel at the given coordinates of the region.
+	 */
+	VipsPel
+	operator()(int x, int y) const
+	{
+		return *addr(x, y);
+	}
+};
+
+VIPS_NAMESPACE_END
+
+#endif /*VIPS_VREGION_H*/