added: a new winix function: imgcrop

for cropping images (and thumbnails)
       www.domain.com/dir/file.jpg/imgcrop  -- crop an image
       www.domain.com/dir/file.jpg/imgcrop/thumb  -- crop an image's thumbnail
       www.domain.com/dir/file.jpg/imgcrop/newthumb  -- crop and create a new thumbnail (from an original image)
       www.domain.com/dir/imgcrop -- show images' list with above options
added: to Image class: some methods for cropping




git-svn-id: svn://ttmath.org/publicrep/winix/trunk@919 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/image.h

@@ -2,7 +2,7 @@
  * This file is a part of Winix
  * and is not publicly distributed
  * 
- * Copyright (c) 2010-2011, Tomasz Sowa
+ * Copyright (c) 2010-2013, Tomasz Sowa
  * All rights reserved.
  * 
  */
@@ -22,7 +22,7 @@
 class System;
 
 
-
+// aspect modes:
 // Width given, height automagically selected to preserve aspect ratio.
 #define WINIX_IMAGE_MODE_1	1
 
@@ -45,25 +45,74 @@ class System;
 #define WINIX_IMAGE_MODE_7	7
 
 
+
+
 // resizing
 #define WINIX_IMAGE_TYPE_RESIZE			1
 
 // generating a thumbnail
 #define WINIX_IMAGE_TYPE_CREATE_THUMB	2
 
+// cropping an image
+#define WINIX_IMAGE_TYPE_CROP			3
+
+// cropping an thumbnail
+#define WINIX_IMAGE_TYPE_CROP_THUMB		4
+
+// creating by cropping a new thumbnail (from an original image)
+#define WINIX_IMAGE_TYPE_CREATE_CROP_NEW_THUMB	5
 
 
+/*
 
+*/
 class Image : public BaseThread
 {
 public:
 
+	struct Scale
+	{
+		size_t cx;
+		size_t cy;
+		int aspect_mode;
+		int quality;
+
+		Scale()
+		{
+			cx = cy = 1;
+			aspect_mode = 2;
+			quality = 100;
+		};
+	};
+
+
 	void SetDb(Db * pdb);
 	void SetConfig(Config * pconfig);
 	void SetSystem(System * psystem);
 
-	void Resize(const Item & item, size_t cx, size_t cy, int aspect_mode, int quality);
-	void CreateThumb(const Item & item, size_t cx, size_t cy, int aspect_mode, int quality);
+
+	// returning scale info for a directory
+	Scale GetImageScale(long dir_id);
+
+	// returning scale info (for thumbnails) for a directory
+	Scale GetThumbScale(long dir_id);
+
+
+
+	void Resize(long file_id, size_t cx, size_t cy, int aspect_mode, int quality);
+
+	// creating a new thumbnail from an original image
+	void CreateThumb(long file_id, size_t thumb_cx, size_t thumb_cy, int aspect_mode, int quality);
+
+	// cropping an image (the thumbnail is not changed)
+	void Crop(long file_id, size_t xoffset, size_t yoffset, size_t cx, size_t cy, int quality);
+
+	// cropping an existing thumbnail
+	void CropThumb(long file_id, size_t xoffset, size_t yoffset, size_t cx, size_t cy, int quality);
+
+	// creating and cropping a new thumbnail (from an original image)
+	void CropNewThumb(long file_id, size_t xoffset, size_t yoffset, size_t cx, size_t cy,
+					  size_t thumb_cx, size_t thumb_cy, int aspect_mode, int quality);
 
 
 private:
@@ -75,13 +124,29 @@ private:
 	struct ImageItem
 	{
 		int type;		// WINIX_IMAGE_TYPE_*
-		Item file;
+		long file_id;
 		size_t cx;
 		size_t cy;
+		size_t xoffset;	// xoffset and yoffset are used when cropping
+		size_t yoffset;
+		size_t thumb_cx;
+		size_t thumb_cy;
 		int aspect_mode;
 		int quality;
 	};
 
+
+	template<typename int_type>
+	void SetMinMax(int_type & var, int var_min, int var_max)
+	{
+		if( static_cast<int>(var) < var_min )
+			var = var_min;
+
+		if( static_cast<int>(var) > var_max )
+			var = var_max;
+	}
+
+
 	// queue of thumbnails to create
 	typedef std::list<ImageItem> ImageTab;
 	ImageTab image_tab;
@@ -96,6 +161,7 @@ private:
 	std::string add_tempa;
 	std::string input_file_name;
 	std::string tmp_file_name;
+	Item file_work;
 
 	virtual bool SignalReceived();
 	virtual void Do();
@@ -104,10 +170,12 @@ private:
 	void CreateTmpFileName();
 	void SaveImage();
 	void CreateImage();
-	void SelectAspect();
+	void SelectAspect(size_t cx, size_t cy);
 	void EscapePath(const std::string & path, TextStream<std::string> & out, bool clear_stream = true);
 	void CheckParam(ImageItem & item);
 	void Add(const std::wstring & in, TextStream<std::string> & out);
+	void ImageSavedCorrectly();
+
 };