libs/PictureBase.h

   1 /* -*-c-*- */
   2
   3 #ifndef Picture_Base_H
   4 #define Picture_Base_H
   5
   6 #include "config.h"
   7
   8 #ifdef HAVE_XRENDER
   9 #define XRenderSupport 1
  10 #else
  11 #define XRenderSupport 0
  12 #endif
  13
  14 #ifdef XPM
  15 #define XpmSupport 1
  16 #else
  17 #define XpmSupport 0
  18 #endif
  19
  20 #ifdef HAVE_PNG
  21 #define PngSupport 1
  22 #else
  23 #define PngSupport 0
  24 #endif
  25
  26 extern Bool Pdefault;
  27 extern Visual *Pvisual;
  28 extern Colormap Pcmap;
  29 extern unsigned int Pdepth;
  30 extern Display *Pdpy;     /* Save area for display pointer */
  31 extern Bool PUseDynamicColors;
  32
  33 typedef struct
  34 {
  35         int color_limit;
  36         int strict;
  37         int allocate;
  38         int not_dynamic;
  39         int use_named_table;
  40 } PictureColorLimitOption;
  41
  42 /**
  43  * Set a colon-separated path, with environment variable expansions.
  44  * Expand '+' to be the value of the previous path.
  45  *
  46  * Parameters:
  47  * p_path          pointer to the path variable
  48  * newpath         new value for *p_path
  49  * free_old_path   set true if we should free the memory pointed to
  50  *                 by p_path on entry
  51  *
  52  * The value of newpath is copied into a newly-allocated place, to which
  53  * '*p_path' will point to upon return.  The memory region pointed to by
  54  * '*p_path' upon entry will be freed if 'free_old_path' is true.
  55  *
  56  **/
  57 void setPath(char** p_path, const char* newpath, int free_old_path);
  58
  59 /**
  60  * Search along colon-separated path for filename, with optional suffix.
  61  *
  62  * Parameters:
  63  * path          colon-separated path of directory names
  64  * filename      basename of file to search for
  65  * suffix        if non-NULL, filename may have this suffix
  66  * type          mode sought for file
  67  *
  68  * For each DIR in the path, search for DIR/filename then
  69  * DIR/<filename><suffix> (if suffix is non-NULL).  Return the full path of
  70  * the first found.
  71  *
  72  * The parameter type is a mask consisting of one or more of R_OK, W_OK, X_OK
  73  * and F_OK.  R_OK, W_OK and X_OK request checking whether the file exists and
  74  * has read, write and execute permissions, respectively.  F_OK just requests
  75  * checking for the existence of the file.
  76  *
  77  * Returns: full pathname of sought-after file, or NULL.  The return value
  78  *          points to allocated memory that the caller must free.
  79  *
  80  **/
  81 char* searchPath(
  82         const char* path, const char* filename, const char* suffix, int type);
  83
  84 /* This routine called during modules initialization. Fvwm has its own code
  85  * in fvwm.c */
  86 void PictureInitCMap(Display *dpy);
  87
  88 /* as above but force to use the default visual. If use_my_color_limit is True
  89  * also enable color limitation (independent than the fvwm one). */
  90 void PictureInitCMapRoot(
  91         Display *dpy, Bool init_color_limit, PictureColorLimitOption *opt,
  92         Bool use_my_color_limit, Bool init_dither);
  93
  94 /* Analogue of the Xlib WhitePixel and BlackPixel functions but use the
  95    Pvisual */
  96 Pixel PictureWhitePixel(void);
  97 Pixel PictureBlackPixel(void);
  98
  99 /* for initialization of the white and black pixel (for fvwm as PictureInitCMap*
 100  * do this) */
 101 void PictureSetupWhiteAndBlack(void);
 102
 103 /* Analogue of the Xlib DefaultGC function but take care of the Pdepth:
 104    - If Pdepth == DefaultDepth return the DefaultGC
 105    - If Pdepth != DefaultDepth and first call create a static gc with the win
 106    and return the gc
 107    -  If Pdepth != DefaultDepth and already called return the static gc */
 108 GC PictureDefaultGC(Display *dpy, Window win);
 109
 110 /* these can be used to switch visuals before calling GetPicture */
 111 /* do NOT use with CachePicture */
 112 void PictureUseDefaultVisual(void);
 113 void PictureUseFvwmVisual(void);
 114 void PictureSaveFvwmVisual(void);
 115
 116 /** Returns current setting of the image path **/
 117 char* PictureGetImagePath(void);
 118
 119
 120 /** Sets image path to newpath.  Environment variables are expanded, and '+'
 121     is expanded to previous value of imagepath.  The new path is in
 122     newly-allocated memory, so newpath may be freed or re-used.  **/
 123 void PictureSetImagePath(const char* newpath);
 124
 125
 126 /** Search for file along pathlist.  If pathlist is NULL, will use the current
 127     imagepath setting.  If filename is not found, but filename.gz is found,
 128     will return the latter.  Mode is typically R_OK.  See searchPath() for
 129     more details.  **/
 130 char* PictureFindImageFile(
 131         const char* filename, const char* pathlist, int mode);
 132
 133 typedef struct FvwmPictureThing
 134 {
 135         struct FvwmPictureThing *next;
 136         char *name;
 137         unsigned long stamp;  /* should be FileStamp */
 138         unsigned long fpa_mask;
 139         Pixmap picture;
 140         Pixmap mask;
 141         Pixmap alpha;
 142         unsigned int depth;
 143         unsigned int width;
 144         unsigned int height;
 145         unsigned int count;
 146         Pixel *alloc_pixels;
 147         int nalloc_pixels;
 148         Bool no_limit;
 149 } FvwmPicture;
 150
 151 typedef struct
 152 {
 153         unsigned alpha : 1;
 154         unsigned alloc_pixels : 1;
 155 } FvwmPictureFlags;
 156
 157 #define FPAM_NO_ALLOC_PIXELS (1)       /* do not return the allocated pixels
 158                                         * this is used only if PUseDynamicColors,
 159                                         * if not the allocated pixels are never
 160                                         * returned */
 161 #define FPAM_NO_COLOR_LIMIT  (1 << 1)  /* do not use color limitation */
 162 #define FPAM_NO_ALPHA        (1 << 2)  /* do not return the alpha channel */
 163 #define FPAM_DITHER          (1 << 3)  /* dither the image */
 164 #define FPAM_TINT            (1 << 4)  /* tint the image */
 165 #define FPAM_MONOCHROME      (1 << 5)  /* reduce the color depth to 1-bit */
 166
 167 typedef struct
 168 {
 169         unsigned mask : 6;
 170         XColor tint;
 171         int tint_percent;
 172 } FvwmPictureAttributes;
 173
 174 /* tint no yet implemented */
 175 #define PICTURE_FPA_AGREE(p,fpa) (p->fpa_mask == fpa.mask)
 176
 177 #define FRAM_HAVE_ADDED_ALPHA       (1)
 178 #define FRAM_HAVE_TINT              (1 << 1)
 179 #define FRAM_HAVE_UNIFORM_COLOR     (1 << 2)
 180 #define FRAM_DEST_IS_A_WINDOW       (1 << 3)
 181 #define FRAM_HAVE_ICON_CSET         (1 << 4)
 182
 183 #include "Colorset.h"
 184
 185 typedef struct
 186 {
 187         unsigned mask : 5;
 188         int added_alpha_percent;
 189         Pixel tint;
 190         int tint_percent;
 191         Pixel uniform_pixel;
 192         colorset_t *colorset;
 193 } FvwmRenderAttributes;
 194
 195 #define PICTURE_HAS_ALPHA(picture,cset) \
 196     ((picture && picture->alpha != None) ||                   \
 197      (cset >= 0 && Colorset[cset].icon_alpha_percent < 100))
 198 /* alpha limit if we cannot use the alpha channel */
 199 #define PICTURE_ALPHA_LIMIT 130
 200
 201 typedef struct
 202 {
 203         Colormap cmap;
 204         int dither;
 205         int no_limit;
 206         Bool is_8;
 207         unsigned long *pixels_table;
 208         int pixels_table_size;
 209 } PictureImageColorAllocator;
 210
 211 #endif /* Picture_Base_H */