Added some utility classes which will make finishing work on DisplayDriver much easier and cleaner

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8854 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/servers/app/GraphicsBuffer.h

@@ -0,0 +1,60 @@
+//------------------------------------------------------------------------------
+//	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:		GraphicsBuffer.h
+//	Author:			DarkWyrm <[email protected]>
+//
+//	Description:	Convenience class for working with graphics buffers
+//					Based on concepts from the Anti-Grain Geometry vector gfx library
+//------------------------------------------------------------------------------
+#ifndef GFX_BUFFER_H
+#define GFX_BUFFER_H
+
+#include <SupportDefs.h>
+
+class GraphicsBuffer
+{
+public:
+	GraphicsBuffer(uint8 *buffer, uint32 width, uint32 height, uint32 rowbytes);
+	~GraphicsBuffer();
+	
+	void SetTo(uint8 *buffer, uint32 width, uint32 height, uint32 rowbytes);
+	void Unset(void);
+	
+	uint8 *Bits(void) const { return fBuffer;    }
+	uint8 *RowAt(uint32 row) { return fRowList[row]; }
+	
+	uint32 Width(void) const { return fWidth;  }
+	uint32 Height(void) const { return fHeight; }
+	
+	uint32 BytesPerRow(void) const { return fBytesPerRow; }
+	
+private:
+	
+	uint32 fWidth;
+	uint32 fHeight;
+	uint8 *fBuffer;
+	uint8 **fRowList;
+	uint32 fBytesPerRow;
+	uint32 fMaxHeight;
+};
+
+#endif

headers/private/servers/app/IPoint.h

@@ -0,0 +1,116 @@
+//------------------------------------------------------------------------------
+//	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:		IPoint.h
+//	Author:			DarkWyrm <[email protected]>
+//					Based on BPoint code by Frans Van Nispen
+//	Description:	Integer BPoint class
+//------------------------------------------------------------------------------
+#ifndef	_IPOINT_H
+#define	_IPOINT_H
+
+// System Includes -------------------------------------------------------------
+#include <BeBuild.h>
+#include <SupportDefs.h>
+#include <Point.h>
+
+class BRect;
+
+class IPoint 
+{
+public:
+	int32 x;
+	int32 y;
+
+	IPoint(void);
+	IPoint(int32 X, int32 Y);
+	IPoint(const IPoint &p);
+	IPoint(const BPoint &p);
+		
+	IPoint &operator=(const IPoint &p);
+	IPoint &operator=(const BPoint &p);
+	void Set(int32 X, int32 Y);
+	
+	void ConstrainTo(BRect r);
+	
+	void PrintToStream() const;
+			
+	IPoint operator+(const IPoint &p) const;
+	IPoint operator+(const BPoint &p) const;
+	IPoint operator-(const IPoint &p) const;
+	IPoint operator-(const BPoint &p) const;
+	IPoint &operator+=(const IPoint &p);
+	IPoint &operator+=(const BPoint &p);
+	IPoint &operator-=(const IPoint &p);
+	IPoint &operator-=(const BPoint &p);
+
+	bool operator!=(const IPoint &p) const;
+	bool operator!=(const BPoint &p) const;
+	bool operator==(const IPoint &p) const;
+	bool operator==(const BPoint &p) const;
+};
+
+//------------------------------------------------------------------------------
+inline IPoint::IPoint(void)
+{
+	x = y = 0;
+}
+//------------------------------------------------------------------------------
+inline IPoint::IPoint(int32 X, int32 Y)
+{
+	x = X;
+	y = Y;
+}
+//------------------------------------------------------------------------------
+inline IPoint::IPoint(const IPoint& pt)
+{
+	x = pt.x;
+	y = pt.y;
+}
+//------------------------------------------------------------------------------
+inline IPoint::IPoint(const BPoint& pt)
+{
+	x = (int32)pt.x;
+	y = (int32)pt.y;
+}
+//------------------------------------------------------------------------------
+inline IPoint &IPoint::operator=(const IPoint& from)
+{
+	x = from.x;
+	y = from.y;
+	return *this;
+}
+//------------------------------------------------------------------------------
+inline IPoint &IPoint::operator=(const BPoint& from)
+{
+	x = (int32)from.x;
+	y = (int32)from.y;
+	return *this;
+}
+//------------------------------------------------------------------------------
+inline void IPoint::Set(int32 X, int32 Y)
+{
+	x = X;
+	y = Y;
+}
+//------------------------------------------------------------------------------
+
+#endif

headers/private/servers/app/PixelRenderer.h

@@ -0,0 +1,125 @@
+//------------------------------------------------------------------------------
+//	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:		PixelRenderer.cpp
+//	Author:			DarkWyrm <[email protected]>
+//
+//	Description:	Base class for pixel plotting renderers
+//					Based on concepts from the Anti-Grain Geometry vector gfx library
+//------------------------------------------------------------------------------
+#ifndef PIXEL_RENDERER
+#define PIXEL_RENDERER
+
+#include "GraphicsBuffer.h"
+#include "GraphicsDefs.h"
+#include "RGBColor.h"
+
+class IPoint;
+
+class PixelRenderer
+{
+public:
+	PixelRenderer(GraphicsBuffer &buffer);
+	virtual ~PixelRenderer(void);
+	
+	virtual color_space ColorSpace(void) { return B_NO_COLOR_SPACE; }
+	
+	virtual RGBColor GetPixel(const IPoint &pt);
+	virtual void PutPixel(const IPoint &pt, RGBColor &c);
+	virtual void PutHLine(const IPoint &pt, const uint32 length, RGBColor &c);
+	virtual void PutVLine(const IPoint &pt, const uint32 length, RGBColor &c);
+	
+	virtual void SetBuffer(GraphicsBuffer &buffer) { fBuffer=&buffer; }
+	GraphicsBuffer *GetBuffer(void) const { return fBuffer; }
+
+private:
+	GraphicsBuffer *fBuffer;
+};
+
+class PixelRendererRGBA32 : public PixelRenderer
+{
+public:
+	PixelRendererRGBA32(GraphicsBuffer &buffer);
+	virtual ~PixelRendererRGBA32(void);
+	
+	virtual color_space ColorSpace(void) { return B_RGBA32; }
+	
+	virtual RGBColor GetPixel(const IPoint &pt);
+	virtual void PutPixel(const IPoint &pt, RGBColor &c);
+	virtual void PutHLine(const IPoint &pt, const uint32 length, RGBColor &c);
+	virtual void PutVLine(const IPoint &pt, const uint32 length, RGBColor &c);
+};
+
+class PixelRendererRGB16 : public PixelRenderer
+{
+public:
+	PixelRendererRGB16(GraphicsBuffer &buffer);
+	virtual ~PixelRendererRGB16(void);
+	
+	virtual color_space ColorSpace(void) { return B_RGB16; }
+	
+	virtual RGBColor GetPixel(const IPoint &pt);
+	virtual void PutPixel(const IPoint &pt, RGBColor &c);
+	virtual void PutHLine(const IPoint &pt, const uint32 length, RGBColor &c);
+	virtual void PutVLine(const IPoint &pt, const uint32 length, RGBColor &c);
+};
+
+class PixelRendererRGBA15 : public PixelRenderer
+{
+public:
+	PixelRendererRGBA15(GraphicsBuffer &buffer);
+	virtual ~PixelRendererRGBA15(void);
+	
+	virtual color_space ColorSpace(void) { return B_RGBA15; }
+	
+	virtual RGBColor GetPixel(const IPoint &pt);
+	virtual void PutPixel(const IPoint &pt, RGBColor &c);
+	virtual void PutHLine(const IPoint &pt, const uint32 length, RGBColor &c);
+	virtual void PutVLine(const IPoint &pt, const uint32 length, RGBColor &c);
+};
+
+class PixelRendererCMAP8 : public PixelRenderer
+{
+public:
+	PixelRendererCMAP8(GraphicsBuffer &buffer);
+	virtual ~PixelRendererCMAP8(void);
+	
+	virtual color_space ColorSpace(void) { return B_CMAP8; }
+	
+	virtual RGBColor GetPixel(const IPoint &pt);
+	virtual void PutPixel(const IPoint &pt, RGBColor &c);
+	virtual void PutHLine(const IPoint &pt, const uint32 length, RGBColor &c);
+	virtual void PutVLine(const IPoint &pt, const uint32 length, RGBColor &c);
+};
+
+// TODO: These inlines probably should go in ColorUtils
+inline uint16 MakeRGB16Color(uint8 r, uint8 g, uint8 b)
+{
+	return (uint16)(((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3));
+}
+
+// TODO: Doublecheck to make sure the shifting is correct in MakeRGBA15Color
+inline uint16 MakeRGBA15Color(uint8 r, uint8 g, uint8 b, bool visible=true)
+{
+	return (uint16)(((r & 0xF8) << 7) | ((g & 0xF8) << 2) | (b >> 3));
+}
+
+#endif

headers/private/servers/app/SystemPalette.h

@@ -31,6 +31,6 @@
 #include <GraphicsDefs.h>
 
 void GenerateSystemPalette(rgb_color *palette);
-extern rgb_color system_palette[];
+extern const rgb_color system_palette[];
 
 #endif