Added class for easily adding pattern support to DisplayDriver subclasses.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2637 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/server/Jamfile

@@ -9,6 +9,7 @@ Server app_server :
 	# Misc. Sources
 	Angle.cpp
 	TokenHandler.cpp
+	PatternHandler.cpp
 
 	# PortLink will disappear as soon as I can figure out how to link the server
 	# against libopenbeos

src/servers/app/server/PatternHandler.cpp

@@ -0,0 +1,139 @@
+//------------------------------------------------------------------------------
+//	Copyright (c) 2001-2002, OpenBeOS
+//
+//	Permission is hereby granted, free of charge, to any person obtaining a
+//	copy of this software and associated documentation files (the "Software"),
+//	to deal in the Software without restriction, including without limitation
+//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+//	and/or sell copies of the Software, and to permit persons to whom the
+//	Software is furnished to do so, subject to the following conditions:
+//
+//	The above copyright notice and this permission notice shall be included in
+//	all copies or substantial portions of the Software.
+//
+//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//	DEALINGS IN THE SOFTWARE.
+//
+//	File Name:		PatternHandler.cpp
+//	Author:			DarkWyrm <bpmagic@columbus.rr.com>
+//	Description:	Class for easy calculation and use of patterns
+//  
+//------------------------------------------------------------------------------
+#include <Point.h>
+#include "PatternHandler.h"
+
+/*!
+	\brief Void constructor
+	
+	The pattern is set to B_SOLID_HIGH, high color is set to black, and 
+	low color is set to white.
+*/
+PatternHandler::PatternHandler(void)
+{
+	_pat.type64=0xFFFFFFFFLL;
+	_high=new RGBColor(0,0,0,255);
+	_low=new RGBColor(255,255,255,255);
+}
+
+/*!
+	\brief Constructor initializes to given pattern
+	\param pat Pattern to use.
+	
+	This initializes to the given pattern or B_SOLID_HIGH if the pattern 
+	is NULL. High color is set to black, and low color is set to white.
+*/
+PatternHandler::PatternHandler(int8 *pat)
+{
+	if(pat)
+		_pat.type64=*((uint64*)pat);
+	else
+		_pat.type64=0xFFFFFFFFLL;
+
+	_high=new RGBColor(0,0,0,255);
+	_low=new RGBColor(255,255,255,255);
+}
+
+//! Destructor frees internal color variables
+PatternHandler::~PatternHandler(void)
+{
+	delete _high;
+	delete _low;
+}
+
+/*!
+	\brief Sets the pattern for the handler to the one given
+	\param pat Pattern to use.
+	
+	This initializes to the given pattern or B_SOLID_HIGH if the pattern 
+	is NULL.
+*/
+void PatternHandler::SetTarget(int8 *pat)
+{
+	if(pat)
+		_pat.type64=*((uint64*)pat);
+	else
+		_pat.type64=0xFFFFFFFFLL;
+}
+
+/*!
+	\brief Set the colors for the pattern to use
+	\param high High color for the handler
+	\param low Low color for the handler
+*/
+void PatternHandler::SetColors(const RGBColor &high, const RGBColor &low)
+{
+	*_high=high;
+	*_low=low;
+}
+
+/*!
+	\brief Obtains the color in the pattern at the specified coordinates
+	\param pt Coordinates to get the color for
+	\return Color for the coordinates
+*/
+RGBColor PatternHandler::GetColor(const BPoint &pt)
+{
+	return GetColor(pt.x,pt.y);
+}
+
+/*!
+	\brief Obtains the color in the pattern at the specified coordinates
+	\param x X coordinate to get the color for
+	\param y Y coordinate to get the color for
+	\return Color for the coordinates
+*/
+RGBColor PatternHandler::GetColor(const float &x, const float &y)
+{
+	int32 value=_pat.type8[(uint32)y%8] & (1 << (7-((uint32)x%8)) );
+
+	return (value==0)?*_low:*_high;
+}
+
+/*!
+	\brief Obtains the value of the pattern at the specified coordinates
+	\param x X coordinate to get the value for
+	\param y Y coordinate to get the value for
+	\return Value for the coordinates - true if high, false if low.
+*/
+bool PatternHandler::GetValue(const float &x, const float &y)
+{
+	int32 value=_pat.type8[(uint32)y%8] & (1 << (7-((uint32)x%8)) );
+
+	return (value==0)?false:true;
+}
+
+/*!
+	\brief Obtains the value of the pattern at the specified coordinates
+	\param pt Coordinates to get the value for
+	\return Value for the coordinates - true if high, false if low.
+*/
+bool PatternHandler::GetValue(const BPoint &pt)
+{
+	return GetValue(pt.x,pt.y);
+}
+

src/servers/app/server/PatternHandler.h

@@ -0,0 +1,63 @@
+//------------------------------------------------------------------------------
+//	Copyright (c) 2001-2002, OpenBeOS
+//
+//	Permission is hereby granted, free of charge, to any person obtaining a
+//	copy of this software and associated documentation files (the "Software"),
+//	to deal in the Software without restriction, including without limitation
+//	the rights to use, copy, modify, merge, publish, distribute, sublicense,
+//	and/or sell copies of the Software, and to permit persons to whom the
+//	Software is furnished to do so, subject to the following conditions:
+//
+//	The above copyright notice and this permission notice shall be included in
+//	all copies or substantial portions of the Software.
+//
+//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+//	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+//	DEALINGS IN THE SOFTWARE.
+//
+//	File Name:		PatternHandler.h
+//	Author:			DarkWyrm <bpmagic@columbus.rr.com>
+//	Description:	Class for easy calculation and use of patterns
+//  
+//------------------------------------------------------------------------------
+#ifndef PATTERNHADLER_H
+
+#include <SupportDefs.h>
+#include "RGBColor.h"
+
+typedef union
+{
+	uint64 type64;
+	uint8 type8[8];
+} pattern_union;
+
+/*!
+	\brief Class for easy calculation and use of patterns
+	
+	PatternHandlers are designed specifically for DisplayDriver subclasses. 
+	Pattern support can be easily added by setting the pattern to use via 
+	SetTarget, and then merely retrieving the value for the coordinates 
+	specified. 
+*/
+class PatternHandler
+{
+public:
+	PatternHandler(void);
+	PatternHandler(int8 *pat);
+	~PatternHandler(void);
+	void SetTarget(int8 *pat);
+	void SetColors(const RGBColor &high, const RGBColor &low);
+	RGBColor GetColor(const BPoint &pt);
+	RGBColor GetColor(const float &x, const float &y);
+	bool GetValue(const float &x, const float &y);
+	bool GetValue(const BPoint &pt);
+private:
+	pattern_union _pat;
+	RGBColor *_high,*_low;
+};
+
+#endif