Add dmagick.CoderInfo.

3 files changed, 116 insertions, 1 deletions

diff --git a/dmagick/CoderInfo.d b/dmagick/CoderInfo.d
new file mode 100644
index 0000000..e003763
--- /dev/null
+++ b/dmagick/CoderInfo.d
@@ -0,0 +1,115 @@
+/**
+ * Copyright: Mike Wey 2011
+ * License:   zlib (See accompanying LICENSE file)
+ * Authors:   Mike Wey
+ */
+
+module dmagick.CoderInfo;
+
+import std.conv;
+import std.string;
+
+import dmagick.Exception;
+
+import dmagick.c.magick;
+
+/**
+ * This provides information about the image formats supported by
+ * Imagemagick. The MatchType determines if a coder should be returned
+ * in the array. MatchType.Any matches both MatchType.True
+ * and MatchType.True.
+ * 
+ * Params:
+ *     readable   = Does the coder need to provide read support.
+ *     writable   = Does the coder need to provide write support.
+ *     multiFrame = Does the coder need to provide multi frame support.
+ */
+CoderInfo[] coderInfoList(MatchType readable, MatchType writable, MatchType multiFrame)
+{
+	size_t length;
+	CoderInfo[] list;
+
+	const(MagickInfo)*[] infoList =
+		GetMagickInfoList("*", &length, DMagickExceptionInfo())[0 .. length];
+
+	foreach ( info; infoList )
+	{
+		CoderInfo coder = CoderInfo(info);
+
+		if ( readable == MatchType.False && coder.readable )
+			continue;
+
+		if ( writable == MatchType.False && coder.writable )
+			continue;
+
+		if ( multiFrame == MatchType.False && coder.supportsMultiFrame )
+			continue;
+
+		list ~= coder;
+	}
+
+	return list;
+}
+
+/**
+ * CoderInfo provides the means to get information regarding ImageMagick
+ * support for an image format (designated by a magick string). It may be
+ * used to provide information for a specific named format (provided as an
+ * argument to the constructor).
+ */
+struct CoderInfo
+{
+	/**
+	 * Format name. (e.g. "GIF")
+	 */
+	string name;
+
+	/**
+	 * Format description. (e.g.  "CompuServe graphics interchange format")
+	 */
+	string description;
+
+	/**
+	 * Format is readable.
+	 */
+	bool readable;
+
+	/**
+	 * Format is writable.
+	 */
+	bool writable;
+
+	/**
+	 * Format supports multiple frames.
+	 */
+	bool supportsMultiFrame;
+
+
+	/**
+	 * Construct object corresponding to named format. (e.g. "GIF")
+	 */
+	this (string format)
+	{
+		const(MagickInfo)* info =
+			GetMagickInfo(toStringz(format), DMagickExceptionInfo());
+
+		this(info);
+	}
+
+	this (const(MagickInfo)* info)
+	{
+		name = to!(string)(info.name);
+		description = to!(string)(info.description);
+		readable = info.decoder !is null;
+		writable = info.encoder !is null;
+		supportsMultiFrame = info.adjoin != 0;
+	}
+}
+
+///
+enum MatchType
+{
+	Any,  /// Don't care.
+	True, /// Matches.
+	False /// Doesn't match.
+}
diff --git a/dmagick/ImageView.d b/dmagick/ImageView.d
index 79b39c4..567e0de 100644
--- a/dmagick/ImageView.d
+++ b/dmagick/ImageView.d
@@ -153,7 +153,6 @@ class ImageView
 	 * Support the usage of foreach to loop over the rows in the view.
 	 * The foreach is executed in parallel.
 	 */
-	//TODO: Should the foreach be parallel?
 	int opApply(int delegate(ref Pixels) dg)
 	{
 		shared(int) progress;
diff --git a/docs/dmagick.ddoc b/docs/dmagick.ddoc
index ab7f726..afe58fc 100644
--- a/docs/dmagick.ddoc
+++ b/docs/dmagick.ddoc
@@ -31,6 +31,7 @@ NAVIGATION =
 
 $(LIST
 	$(NAVLINK Array),
+	$(NAVLINK Coderinfo),
 	$(NAVLINK Color),
 	$(NAVLINK ColorCMYK),
 	$(NAVLINK ColorGray),