Forgot to check in the new file.

1 files changed, 152 insertions, 0 deletions

diff --git a/dmagick/ImageView.d b/dmagick/ImageView.d
new file mode 100644
index 0000000..5cad837
--- /dev/null
+++ b/dmagick/ImageView.d
@@ -0,0 +1,152 @@
+module dmagick.ImageView;
+
+import std.array;
+
+import dmagick.Color;
+import dmagick.Exception;
+import dmagick.Geometry;
+import dmagick.Image;
+
+import dmagick.c.cache;
+import dmagick.c.geometry;
+import dmagick.c.pixel;
+
+class ImageView
+{
+	Image image;
+	RectangleInfo extent;
+
+	this(Image image, Geometry area)
+	{
+		if ( area.width + area.xOffset > image.columns ||
+			area.height + area.yOffset > image.rows )
+		{
+			throw new OptionException("Specified area is larger than the image");
+		}
+
+		this.image = image;
+		this.extent = area.rectangleInfo;
+	}
+
+	Row opIndex(size_t row)
+	{
+		PixelPacket* pixels = 
+			GetAuthenticPixels(image.imageRef, extent.x, extent.y, 1, extent.width, DMagickExceptionInfo());
+
+		return Row(image, pixels[0 .. extent.width]);
+	}
+
+	ImageView opSlice()
+	{
+		return opSlice(0, extent.height);
+	}
+
+	ImageView opSlice(size_t upper, size_t lower)
+	{
+		RectangleInfo newExtent = extent;
+
+		newExtent.y += upper;
+		newExtent.height = lower - upper;
+
+		return new Rows(image, Geometry(newExtent));
+	}
+
+	int opApply(int delegate(ref Row) dg)
+	{
+		//Use UpdateImageViewIterator ?
+	}
+}
+
+class Rows : ImageView
+{
+	this(Image image, Geometry area)
+	{
+		super(image, area);
+	}
+
+	override Row opIndex(size_t column)
+	{
+		PixelPacket* pixels = 
+			GetAuthenticPixels(image.imageRef, extent.x, extent.y, extent.height, 1, DMagickExceptionInfo());
+
+		return Row(image, pixels[0 .. extent.width]);
+	}
+
+	override ImageView opSlice()
+	{
+		return opSlice(0, extent.width);
+	}
+
+	override ImageView opSlice(size_t left, size_t right)
+	{
+		RectangleInfo newExtent = extent;
+
+		newExtent.x += left;
+		newExtent.width = right - left;
+
+		return new ImageView(image, Geometry(newExtent));
+	}
+}
+
+struct Row
+{
+	Image image;
+	PixelPacket[] pixels;
+	
+	this(Image image, PixelPacket[] pixels)
+	{
+		this.image = image;
+		this.pixels = pixels;
+	}
+
+	~this()
+	{
+		SyncAuthenticPixels(image.imageRef, DMagickExceptionInfo());
+	}
+
+	Color opIndex(size_t pixel)
+	{
+		return new Color(&(pixels[pixel]));
+	}
+
+	void opIndexAssign(Color color, size_t i)
+	{
+		pixels[i] = color.pixelPacket;
+	}
+
+	Row opSlice()
+	{
+		return this;
+	}
+
+	Row opSilce(size_t left, size_t right)
+	{
+		return Row(image, pixels[left .. right]);
+	}
+
+	void opSliceAssign(Color color)
+	{
+		opSliceAssign(color, 0, pixels.length);
+	}
+
+	void opSliceAssign(Color color, size_t left, size_t right)
+	{
+		foreach( i; left .. right )
+			this[i] = color;
+	}
+
+	@property bool empty()
+	{
+		return pixels.empty;
+	}
+
+	Color front()
+	{
+		return this[0];
+	}
+
+	void popFront()
+	{
+		pixels.popFront();
+	}
+}