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Image.hh

// 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


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