Dogcows Code - chaz/openbox/blob - otk_c/color.c

   1 // -*- mode: C; indent-tabs-mode: nil; -*-
   2
   3 #include "../config.h"
   4 #include "color.h"
   5 #include "display.h"
   6 #include "screeninfo.h"
   7
   8 #ifdef HAVE_STDLIB_H
   9 # include <stdlib.h>
  10 #endif
  11
  12 static Bool cleancache = False;
  13 static PyObject *colorcache = NULL;
  14
  15 static void parseColorName(OtkColor *self, const char *name) {
  16   XColor xcol;
  17
  18   // get rgb values from colorname
  19   xcol.red = 0;
  20   xcol.green = 0;
  21   xcol.blue = 0;
  22   xcol.pixel = 0;
  23
  24   if (!XParseColor(OBDisplay->display,
  25                    OtkDisplay_ScreenInfo(OBDisplay, self->screen)->colormap,
  26                    name, &xcol)) {
  27     fprintf(stderr, "OtkColor: color parse error: \"%s\"\n", name);
  28     self->red = self->green = self->blue = 0;
  29   } else {
  30     self->red = xcol.red >> 8;
  31     self->green = xcol.green >> 8;
  32     self->blue = xcol.blue >> 8;
  33   }
  34 }
  35
  36 static void doCacheCleanup() {
  37   unsigned long *pixels;
  38   int i, ppos;
  39   unsigned int count;
  40   PyObject *key; // this is a color too, but i dont need to use it as such
  41   OtkColor *color;
  42
  43   // ### TODO - support multiple displays!
  44   if (!PyDict_Size(colorcache)) return; // nothing to do
  45
  46   pixels = malloc(sizeof(unsigned long) * PyDict_Size(colorcache));
  47
  48   for (i = 0; i < ScreenCount(OBDisplay->display); i++) {
  49     count = 0;
  50     ppos = 0;
  51
  52     while (PyDict_Next(colorcache, &ppos, &key, (PyObject**)&color)) {
  53       // get the screen from the hash
  54       if (color->screen != i) continue; // wrong screen
  55
  56       // does someone other than the cache have a reference? (the cache gets 2)
  57       if (color->ob_refcnt > 2)
  58         continue;
  59
  60       pixels[count++] = color->pixel;
  61       PyDict_DelItem(colorcache, key);
  62       --ppos; // back up one in the iteration
  63     }
  64
  65     if (count > 0)
  66       XFreeColors(OBDisplay->display,
  67                   OtkDisplay_ScreenInfo(OBDisplay, i)->colormap,
  68                   pixels, count, 0);
  69   }
  70
  71   free(pixels);
  72   cleancache = False;
  73 }
  74
  75 static void allocate(OtkColor *self) {
  76   XColor xcol;
  77
  78   // allocate color from rgb values
  79   xcol.red =   self->red   | self->red   << 8;
  80   xcol.green = self->green | self->green << 8;
  81   xcol.blue =  self->blue  | self->blue  << 8;
  82   xcol.pixel = 0;
  83
  84   if (!XAllocColor(OBDisplay->display,
  85                    OtkDisplay_ScreenInfo(OBDisplay, self->screen)->colormap,
  86                    &xcol)) {
  87     fprintf(stderr, "OtkColor: color alloc error: rgb:%x/%x/%x\n",
  88             self->red, self->green, self->blue);
  89     xcol.pixel = 0;
  90   }
  91
  92   self->pixel = xcol.pixel;
  93
  94   if (cleancache)
  95     doCacheCleanup();
  96 }
  97
  98 PyObject *OtkColor_FromRGB(int r, int g, int b, int screen)
  99 {
 100   OtkColor *self = PyObject_New(OtkColor, &OtkColor_Type);
 101   PyObject *cached;
 102
 103   assert(screen >= 0); assert(r >= 0); assert(g >= 0); assert(b >= 0);
 104   assert(r <= 0xff); assert(g <= 0xff); assert(b <= 0xff);
 105
 106   if (!colorcache) colorcache = PyDict_New();
 107
 108   self->red = r;
 109   self->green = g;
 110   self->blue = b;
 111   self->screen = screen;
 112
 113   // does this color already exist in the cache?
 114   cached = PyDict_GetItem(colorcache, (PyObject*)self);
 115   if (cached) {
 116     Py_INCREF(cached);
 117     return cached;
 118   }
 119
 120   // add it to the cache
 121   PyDict_SetItem(colorcache, (PyObject*)self, (PyObject*)self);
 122   allocate(self);
 123   return (PyObject*)self;
 124 }
 125
 126 PyObject *OtkColor_FromName(const char *name, int screen)
 127 {
 128   OtkColor *self = PyObject_New(OtkColor, &OtkColor_Type);
 129   PyObject *cached;
 130
 131   assert(screen >= 0); assert(name);
 132
 133   if (!colorcache) colorcache = PyDict_New();
 134
 135   self->red = -1;
 136   self->green = -1;
 137   self->blue = -1;
 138   self->screen = screen;
 139
 140   parseColorName(self, name);
 141
 142   // does this color already exist in the cache?
 143   cached = PyDict_GetItem(colorcache, (PyObject*)self);
 144   if (cached) {
 145     Py_INCREF(cached);
 146     return cached;
 147   }
 148
 149   // add it to the cache
 150   PyDict_SetItem(colorcache, (PyObject*)self, (PyObject*)self);
 151   allocate(self);
 152   return (PyObject*)self;
 153 }
 154
 155 void OtkColor_CleanupColorCache()
 156 {
 157   cleancache = True;
 158 }
 159
 160
 161
 162 static void otkcolor_dealloc(OtkColor* self)
 163 {
 164   // when this is called, the color has already been cleaned out of the cache
 165   PyObject_Del((PyObject*)self);
 166 }
 167
 168 static int otkcolor_compare(OtkColor *c1, OtkColor *c2)
 169 {
 170   long result;
 171   unsigned long p1, p2;
 172
 173   p1 = c1->red << 16 | c1->green << 8 | c1->blue;
 174   p2 = c2->red << 16 | c2->green << 8 | c2->blue;
 175
 176   if (p1 < p2)
 177     result = -1;
 178   else if (p1 > p2)
 179     result = 1;
 180   else
 181     result = 0;
 182   return result;
 183 }
 184
 185 static PyObject *otkcolor_repr(OtkColor *self)
 186 {
 187   return PyString_FromFormat("rgb:%x/%x/%x", self->red, self->green,
 188                              self->blue);
 189 }
 190
 191 static long otkcolor_hash(OtkColor *self)
 192 {
 193   return self->screen << 24 | self->red << 16 | self->green << 8 | self->blue;
 194 }
 195
 196 PyTypeObject OtkColor_Type = {
 197   PyObject_HEAD_INIT(NULL)
 198   0,
 199   "OtkColor",
 200   sizeof(OtkColor),
 201   0,
 202   (destructor)otkcolor_dealloc, /*tp_dealloc*/
 203   0,                            /*tp_print*/
 204   0,                            /*tp_getattr*/
 205   0,                            /*tp_setattr*/
 206   (cmpfunc)otkcolor_compare,    /*tp_compare*/
 207   (reprfunc)otkcolor_repr,      /*tp_repr*/
 208   0,                            /*tp_as_number*/
 209   0,                            /*tp_as_sequence*/
 210   0,                            /*tp_as_mapping*/
 211   (hashfunc)otkcolor_hash,      /*tp_hash */
 212 };