From 7f4c880147719d7b2d3cd97c68ad5af76764042b Mon Sep 17 00:00:00 2001
From: madmaxoft <github@xoft.cz>
Date: Fri, 30 Aug 2013 20:46:16 +0200
Subject: AnvilStats: Implemented a cImageComposingCallback class.

This will ease the creation of callbacks that produce per-region images of stuff.
---
 Tools/AnvilStats/ImageComposingCallback.h | 95 +++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 Tools/AnvilStats/ImageComposingCallback.h

(limited to 'Tools/AnvilStats/ImageComposingCallback.h')

diff --git a/Tools/AnvilStats/ImageComposingCallback.h b/Tools/AnvilStats/ImageComposingCallback.h
new file mode 100644
index 000000000..c04dc869f
--- /dev/null
+++ b/Tools/AnvilStats/ImageComposingCallback.h
@@ -0,0 +1,95 @@
+
+// ImageComposingCallback
+
+// Declares the cImageComposingCallback class that implements a subset of cCallback for composing per-region images
+
+
+
+
+
+#pragma once
+
+#include "Callback.h"
+
+
+
+
+/** Implements the plumbing for composing per-region images from multiple chunks.
+To use this class, create a descendant that writes the image data using
+SetPixel() or SetPixelURow() functions.
+
+For the purpose of this class the image data is indexed U (horz) * V (vert), to avoid confusion with other coords.
+The image is a 32bpp raw imagedata, written into a BMP file.
+*/
+class cImageComposingCallback :
+	public cCallback
+{
+public:
+	enum
+	{
+		INVALID_REGION_COORD = 99999,  ///< Used for un-assigned region coords
+		IMAGE_WIDTH = 32 * 16,
+		IMAGE_HEIGHT = 32 * 16,
+		PIXEL_COUNT = IMAGE_WIDTH * IMAGE_HEIGHT,  ///< Total pixel count of the image data
+	} ;
+	
+	cImageComposingCallback(const AString & a_FileNamePrefix);
+	virtual ~cImageComposingCallback();
+
+	// cCallback overrides:
+	virtual bool OnNewRegion(int a_RegionX, int a_RegionZ) override;
+	virtual void OnRegionFinished(int a_RegionX, int a_RegionZ) override;
+	
+	// New introduced overridable functions:
+	
+	/// Called when a file is about to be saved, to generate the filename
+	virtual AString GetFileName(int a_RegionX, int a_RegionZ);
+	
+	/// Called before the file is saved
+	virtual void OnBeforeImageSaved(int a_RegionX, int a_RegionZ, const AString & a_FileName) {}
+	
+	/// Called after the image is saved to a file
+	virtual void OnAfterImageSaved(int a_RegionX, int a_RegionZ, const AString & a_FileName) {}
+	
+	/// Called when a new region is beginning, to erase the image data
+	virtual void OnEraseImage(void);
+	
+	// Functions for manipulating the image:
+	
+	/// Erases the entire image with the specified color
+	void EraseImage(int a_Color);
+	
+	/// Erases the specified chunk's portion of the image with the specified color. Note that chunk coords are relative to the current region
+	void EraseChunk(int a_Color, int a_RelChunkX, int a_RelChunkZ);
+	
+	/// Returns the current region X coord
+	int GetCurrentRegionX(void) const { return m_CurrentRegionX; }
+	
+	/// Returns the current region Z coord
+	int GetCurrentRegionZ(void) const { return m_CurrentRegionZ; }
+	
+	/// Sets the pixel at the specified UV coords to the specified color
+	void SetPixel(int a_RelU, int a_RelV, int a_Color);
+	
+	/// Returns the color of the pixel at the specified UV coords; -1 if outside
+	int GetPixel(int a_RelU, int a_RelV);
+	
+	/// Sets a row of pixels. a_Pixels is expected to be a_CountU pixels wide. a_RelUStart + a_CountU is assumed less than image width
+	void SetPixelURow(int a_RelUStart, int a_RelV, int a_CountU, int * a_Pixels);
+	
+protected:
+	/// Prefix for the filenames, when generated by the default GetFileName() function
+	AString m_FileNamePrefix;
+	
+	/// Coords of the currently processed region
+	int m_CurrentRegionX, m_CurrentRegionZ;
+	
+	/// Raw image data; 1 MiB worth of data, therefore unsuitable for stack allocation. [u + IMAGE_WIDTH * v]
+	int * m_ImageData;
+	
+	void SaveImage(const AString & a_FileName);
+} ;
+
+
+
+
-- 
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