File: Image.hh

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// Image.hh for Blackbox - an X11 Window manager
// Copyright (c) 1997 - 2000 Brad Hughes (bhughes@tcac.net)
//
// 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.

#ifndef   __Image_hh
#define   __Image_hh

#include <X11/Xlib.h>
#include <X11/Xutil.h>

#include "Timer.hh"

class BImage;
class BImageControl;


class BColor
{
private:
	int allocated;
	unsigned char red, green, blue;
	unsigned long pixel;

public:
	BColor(char r = 0, char g = 0, char b = 0)
	{
		red = r;
		green = g;
		blue = b;
		pixel = 0;
		allocated = 0;
	}

	inline const int &isAllocated(void) const
	{
		return allocated;
	}

	inline const unsigned char &getRed(void) const
	{
		return red;
	}
	inline const unsigned char &getGreen(void) const
	{
		return green;
	}
	inline const unsigned char &getBlue(void) const
	{
		return blue;
	}

	inline const unsigned long &getPixel(void) const
	{
		return pixel;
	}

	inline void setAllocated(int a)
	{
		allocated = a;
	}
	inline void setRGB(char r, char g, char b)
	{
		red = r;
		green = g;
		blue = b;
	}
	inline void setPixel(unsigned long p)
	{
		pixel = p;
	}
};


class BTexture
{
private:
	BColor color, colorTo, hiColor, loColor;
	unsigned long texture;

public:
	BTexture(void)
	{
		texture = 0;
	}

	inline BColor *getColor(void)
	{
		return &color;
	}
	inline BColor *getColorTo(void)
	{
		return &colorTo;
	}
	inline BColor *getHiColor(void)
	{
		return &hiColor;
	}
	inline BColor *getLoColor(void)
	{
		return &loColor;
	}

	inline const unsigned long &getTexture(void) const
	{
		return texture;
	}

	inline void setTexture(unsigned long t)
	{
		texture = t;
	}
	inline void addTexture(unsigned long t)
	{
		texture |= t;
	}
};


// bevel options
#define BImage_Flat		(1l<<1)
#define BImage_Sunken		(1l<<2)
#define BImage_Raised		(1l<<3)

// textures
#define BImage_Solid		(1l<<4)
#define BImage_Gradient		(1l<<5)

// gradients
#define BImage_Horizontal	(1l<<6)
#define BImage_Vertical		(1l<<7)
#define BImage_Diagonal		(1l<<8)
#define BImage_CrossDiagonal	(1l<<9)
#define BImage_Rectangle	(1l<<10)
#define BImage_Pyramid		(1l<<11)
#define BImage_PipeCross	(1l<<12)
#define BImage_Elliptic		(1l<<13)

// bevel types
#define BImage_Bevel1		(1l<<14)
#define BImage_Bevel2		(1l<<15)

// inverted image
#define BImage_Invert		(1l<<16)

// parent relative image
#define BImage_ParentRelative   (1l<<17)

#ifdef    INTERLACE
// fake interlaced image
#  define BImage_Interlaced	(1l<<18)
#endif // INTERLACE

#include "BaseDisplay.hh"
#include "LinkedList.hh"


class BImage
{
private:
	BImageControl *control;

#ifdef    INTERLACE
	Bool interlaced;
#endif // INTERLACE

	XColor *colors;

	BColor *from, *to;
	int red_offset, green_offset, blue_offset, red_bits, green_bits, blue_bits,
	ncolors, cpc, cpccpc;
	unsigned char *red, *green, *blue, *red_table, *green_table, *blue_table;
	unsigned int width, height, *xtable, *ytable;


protected:
	Pixmap renderPixmap(void);

	XImage *renderXImage(void);

	void invert(void);
	void bevel1(void);
	void bevel2(void);
	void dgradient(void);
	void egradient(void);
	void hgradient(void);
	void pgradient(void);
	void rgradient(void);
	void vgradient(void);
	void cdgradient(void);
	void pcgradient(void);


public:
	BImage(BImageControl *, unsigned int, unsigned int);
	~BImage(void);

	Pixmap render(BTexture *);
	Pixmap render_solid(BTexture *);
	Pixmap render_gradient(BTexture *);
};


class BImageControl : public TimeoutHandler
{
private:
	Bool dither;
	BaseDisplay *basedisplay;
	ScreenInfo *screeninfo;
#ifdef    TIMEDCACHE
	BTimer *timer;
#endif // TIMEDCACHE

	Colormap root_colormap;
	Window window;
	XColor *colors;
	int colors_per_channel, ncolors, screen_number, screen_depth,
	bits_per_pixel, red_offset, green_offset, blue_offset,
	red_bits, green_bits, blue_bits;
	unsigned char red_color_table[256], green_color_table[256],
	blue_color_table[256];
	unsigned int *grad_xbuffer, *grad_ybuffer, grad_buffer_width,
	grad_buffer_height;
	unsigned long *sqrt_table, cache_max;

	typedef struct Cache
	{
		Pixmap pixmap;

		unsigned int count, width, height;
		unsigned long pixel1, pixel2, texture;
	}
	Cache;

	LinkedList<Cache> *cache;


protected:
	Pixmap searchCache(unsigned int, unsigned int, unsigned long, BColor *,
	                   BColor *);


public:
	BImageControl(BaseDisplay *, ScreenInfo *, Bool = False, int = 4,
	              unsigned long = 300000l, unsigned long = 200l);
	virtual ~BImageControl(void);

	inline BaseDisplay *getBaseDisplay(void)
	{
		return basedisplay;
	}

	inline const Bool &doDither(void)
	{
		return dither;
	}

	inline const Colormap &getColormap(void) const
	{
		return root_colormap;
	}

	inline ScreenInfo *getScreenInfo(void)
	{
		return screeninfo;
	}

	inline const Window &getDrawable(void) const
	{
		return window;
	}

	inline Visual *getVisual(void)
	{
		return screeninfo->getVisual();
	}

	inline const int &getBitsPerPixel(void) const
	{
		return bits_per_pixel;
	}
	inline const int &getDepth(void) const
	{
		return screen_depth;
	}
	inline const int &getColorsPerChannel(void) const
	{
		return colors_per_channel;
	}

	unsigned long getColor(const char *);
	unsigned long getColor(const char *, unsigned char *, unsigned char *,
	                       unsigned char *);
	unsigned long getSqrt(unsigned int);

	Pixmap renderImage(unsigned int, unsigned int, BTexture *);

	void installRootColormap(void);
	void removeImage(Pixmap);
	void getColorTables(unsigned char **, unsigned char **, unsigned char **,
	                    int *, int *, int *, int *, int *, int *);
	void getXColorTable(XColor **, int *);
	void getGradientBuffers(unsigned int, unsigned int,
	                        unsigned int **, unsigned int **);
	void setDither(Bool d)
	{
		dither = d;
	}
	void setColorsPerChannel(int);
	void parseTexture(BTexture *, char *);
	void parseColor(BColor *, char * = 0);

	virtual void timeout(void);
};


#endif // __Image_hh