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 otkcolor_dealloc(OtkColor* self)
  16 {
  17   // when this is called, the color has already been cleaned out of the cache
  18   PyObject_Del((PyObject*)self);
  19 }
  20
  21 static int otkcolor_compare(OtkColor *c1, OtkColor *c2)
  22 {
  23   long result;
  24   unsigned long p1, p2;
  25
  26   p1 = c1->red << 16 | c1->green << 8 | c1->blue;
  27   p2 = c2->red << 16 | c2->green << 8 | c2->blue;
  28
  29   if (p1 < p2)
  30     result = -1;
  31   else if (p1 > p2)
  32     result = 1;
  33   else
  34     result = 0;
  35   return result;
  36 }
  37
  38 static PyObject *otkcolor_repr(OtkColor *self)
  39 {
  40   return PyString_FromFormat("rgb:%x/%x/%x", self->red, self->green,
  41                              self->blue);
  42 }
  43
  44 static long otkcolor_hash(OtkColor *self)
  45 {
  46   return self->screen << 24 | self->red << 16 | self->green << 8 | self->blue;
  47 }
  48
  49 static PyTypeObject OtkColor_Type = {
  50   PyObject_HEAD_INIT(NULL)
  51   0,
  52   "Color",
  53   sizeof(OtkColor),
  54   0,
  55   (destructor)otkcolor_dealloc, /*tp_dealloc*/
  56   0,                            /*tp_print*/
  57   0,                            /*tp_getattr*/
  58   0,                            /*tp_setattr*/
  59   (cmpfunc)otkcolor_compare,    /*tp_compare*/
  60   (reprfunc)otkcolor_repr,      /*tp_repr*/
  61   0,                            /*tp_as_number*/
  62   0,                            /*tp_as_sequence*/
  63   0,                            /*tp_as_mapping*/
  64   (hashfunc)otkcolor_hash,      /*tp_hash */
  65 };
  66
  67
  68 static void parseColorName(OtkColor *self, const char *name) {
  69   XColor xcol;
  70
  71   // get rgb values from colorname
  72   xcol.red = 0;
  73   xcol.green = 0;
  74   xcol.blue = 0;
  75   xcol.pixel = 0;
  76
  77   if (!XParseColor(OBDisplay->display,
  78                    OtkDisplay_ScreenInfo(OBDisplay, self->screen)->colormap,
  79                    name, &xcol)) {
  80     fprintf(stderr, "OtkColor: color parse error: \"%s\"\n", name);
  81     self->red = self->green = self->blue = 0;
  82   } else {
  83     self->red = xcol.red >> 8;
  84     self->green = xcol.green >> 8;
  85     self->blue = xcol.blue >> 8;
  86   }
  87 }
  88
  89 static void doCacheCleanup() {
  90   unsigned long *pixels;
  91   int i, ppos;
  92   unsigned int count;
  93   PyObject *key; // this is a color too, but i dont need to use it as such
  94   OtkColor *color;
  95
  96   // ### TODO - support multiple displays!
  97   if (!PyDict_Size(colorcache)) return; // nothing to do
  98
  99   pixels = malloc(sizeof(unsigned long) * PyDict_Size(colorcache));
 100
 101   for (i = 0; i < ScreenCount(OBDisplay->display); i++) {
 102     count = 0;
 103     ppos = 0;
 104
 105     while (PyDict_Next(colorcache, &ppos, &key, (PyObject**)&color)) {
 106       // get the screen from the hash
 107       if (color->screen != i) continue; // wrong screen
 108
 109       // does someone other than the cache have a reference? (the cache gets 2)
 110       if (color->ob_refcnt > 2)
 111         continue;
 112
 113       pixels[count++] = color->pixel;
 114       PyDict_DelItem(colorcache, key);
 115       --ppos; // back up one in the iteration
 116     }
 117
 118     if (count > 0)
 119       XFreeColors(OBDisplay->display,
 120                   OtkDisplay_ScreenInfo(OBDisplay, i)->colormap,
 121                   pixels, count, 0);
 122   }
 123
 124   free(pixels);
 125   cleancache = False;
 126 }
 127
 128 static void allocate(OtkColor *self) {
 129   XColor xcol;
 130
 131   assert(!self->allocated);
 132
 133   // allocate color from rgb values
 134   xcol.red =   self->red   | self->red   << 8;
 135   xcol.green = self->green | self->green << 8;
 136   xcol.blue =  self->blue  | self->blue  << 8;
 137   xcol.pixel = 0;
 138
 139   if (!XAllocColor(OBDisplay->display,
 140                    OtkDisplay_ScreenInfo(OBDisplay, self->screen)->colormap,
 141                    &xcol)) {
 142     fprintf(stderr, "OtkColor: color alloc error: rgb:%x/%x/%x\n",
 143             self->red, self->green, self->blue);
 144     xcol.pixel = 0;
 145   }
 146
 147   self->pixel = xcol.pixel;
 148   self->allocated = True;
 149
 150   if (cleancache)
 151     doCacheCleanup();
 152 }
 153
 154 PyObject *OtkColor_FromRGB(int r, int g, int b, int screen)
 155 {
 156   OtkColor *self = PyObject_New(OtkColor, &OtkColor_Type);
 157   PyObject *cached;
 158
 159   assert(screen >= 0); assert(r >= 0); assert(g >= 0); assert(b >= 0);
 160   assert(r <= 0xff); assert(g <= 0xff); assert(b <= 0xff);
 161
 162   if (!colorcache) colorcache = PyDict_New();
 163
 164   self->allocated = False;
 165   self->red = r;
 166   self->green = g;
 167   self->blue = b;
 168   self->pixel = 0;
 169   self->screen = screen;
 170
 171   // does this color already exist in the cache?
 172   cached = PyDict_GetItem(colorcache, (PyObject*)self);
 173   if (cached) {
 174     Py_INCREF(cached);
 175     return cached;
 176   }
 177
 178   // add it to the cache
 179   PyDict_SetItem(colorcache, (PyObject*)self, (PyObject*)self);
 180   return (PyObject*)self;
 181 }
 182
 183 PyObject *OtkColor_FromName(const char *name, int screen)
 184 {
 185   OtkColor *self = PyObject_New(OtkColor, &OtkColor_Type);
 186   PyObject *cached;
 187
 188   assert(screen >= 0); assert(name);
 189
 190   if (!colorcache) colorcache = PyDict_New();
 191
 192   self->allocated = False;
 193   self->red = -1;
 194   self->green = -1;
 195   self->blue = -1;
 196   self->pixel = 0;
 197   self->screen = screen;
 198
 199   parseColorName(self, name);
 200
 201   // does this color already exist in the cache?
 202   cached = PyDict_GetItem(colorcache, (PyObject*)self);
 203   if (cached) {
 204     Py_INCREF(cached);
 205     return cached;
 206   }
 207
 208   // add it to the cache
 209   PyDict_SetItem(colorcache, (PyObject*)self, (PyObject*)self);
 210   return (PyObject*)self;
 211 }
 212
 213 unsigned long OtkColor_Pixel(OtkColor *self)
 214 {
 215   if (!self->allocated)
 216     allocate(self);
 217   return self->pixel;
 218 }
 219
 220 void OtkColor_CleanupColorCache()
 221 {
 222   cleancache = True;
 223 }