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 #include <stdio.h>
  90 static void doCacheCleanup() {
  91   unsigned long *pixels;
  92   int i, ppos;
  93   unsigned int count;
  94   PyObject *key; // this is a color too, but i dont need to use it as such
  95   OtkColor *color;
  96
  97   // ### TODO - support multiple displays!
  98   if (!PyDict_Size(colorcache)) return; // nothing to do
  99
 100   printf("Cleaning Cache...\n");
 101
 102   pixels = malloc(sizeof(unsigned long) * PyDict_Size(colorcache));
 103
 104   for (i = 0; i < ScreenCount(OBDisplay->display); i++) {
 105     printf("Screen %d\n", i);
 106     count = 0;
 107     ppos = 0;
 108
 109     while (PyDict_Next(colorcache, &ppos, &key, (PyObject**)&color)) {
 110       // get the screen from the hash
 111       if (color->screen != i) continue; // wrong screen
 112
 113       printf("has %d refs\n", color->ob_refcnt);
 114
 115       // does someone other than the cache have a reference? (the cache gets 2)
 116       if (color->ob_refcnt > 2)
 117         continue;
 118
 119       printf("ppos: %d\n", ppos);
 120       printf("Cleaning pixel: %lx Count: %d\n", color->pixel, count+1);
 121
 122       pixels[count++] = color->pixel;
 123       printf("pixref references before: %d\n", color->ob_refcnt);
 124       PyDict_DelItem(colorcache, key);
 125       printf("pixref references after: %d\n", color->ob_refcnt);
 126       --ppos; // back up one in the iteration
 127     }
 128
 129     if (count > 0)
 130       XFreeColors(OBDisplay->display,
 131                   OtkDisplay_ScreenInfo(OBDisplay, i)->colormap,
 132                   pixels, count, 0);
 133     printf("Done Cleaning Cache. Cleaned %d pixels\n", count);
 134   }
 135
 136   free(pixels);
 137   cleancache = False;
 138 }
 139
 140 static void allocate(OtkColor *self) {
 141   XColor xcol;
 142
 143   assert(!self->allocated);
 144
 145   printf("allocating! %d\n", cleancache);
 146
 147   // allocate color from rgb values
 148   xcol.red =   self->red   | self->red   << 8;
 149   xcol.green = self->green | self->green << 8;
 150   xcol.blue =  self->blue  | self->blue  << 8;
 151   xcol.pixel = 0;
 152
 153   if (!XAllocColor(OBDisplay->display,
 154                    OtkDisplay_ScreenInfo(OBDisplay, self->screen)->colormap,
 155                    &xcol)) {
 156     fprintf(stderr, "OtkColor: color alloc error: rgb:%x/%x/%x\n",
 157             self->red, self->green, self->blue);
 158     xcol.pixel = 0;
 159   }
 160
 161   self->pixel = xcol.pixel;
 162   self->allocated = True;
 163
 164   if (cleancache)
 165     doCacheCleanup();
 166 }
 167
 168 PyObject *OtkColor_FromRGB(int r, int g, int b, int screen)
 169 {
 170   OtkColor *self = PyObject_New(OtkColor, &OtkColor_Type);
 171   PyObject *cached;
 172
 173   assert(screen >= 0); assert(r >= 0); assert(g >= 0); assert(b >= 0);
 174   assert(r <= 0xff); assert(g <= 0xff); assert(b <= 0xff);
 175
 176   if (!colorcache) colorcache = PyDict_New();
 177
 178   self->allocated = False;
 179   self->red = r;
 180   self->green = g;
 181   self->blue = b;
 182   self->pixel = 0;
 183   self->screen = screen;
 184
 185   // does this color already exist in the cache?
 186   cached = PyDict_GetItem(colorcache, (PyObject*)self);
 187   if (cached) {
 188     Py_INCREF(cached);
 189     return cached;
 190   }
 191
 192   // add it to the cache
 193   PyDict_SetItem(colorcache, (PyObject*)self, (PyObject*)self);
 194   return (PyObject*)self;
 195 }
 196
 197 PyObject *OtkColor_FromName(const char *name, int screen)
 198 {
 199   OtkColor *self = PyObject_New(OtkColor, &OtkColor_Type);
 200   PyObject *cached;
 201
 202   assert(screen >= 0); assert(name);
 203
 204   if (!colorcache) colorcache = PyDict_New();
 205
 206   self->allocated = False;
 207   self->red = -1;
 208   self->green = -1;
 209   self->blue = -1;
 210   self->pixel = 0;
 211   self->screen = screen;
 212
 213   parseColorName(self, name);
 214
 215   // does this color already exist in the cache?
 216   cached = PyDict_GetItem(colorcache, (PyObject*)self);
 217   if (cached) {
 218     Py_INCREF(cached);
 219     return cached;
 220   }
 221
 222   // add it to the cache
 223   PyDict_SetItem(colorcache, (PyObject*)self, (PyObject*)self);
 224   return (PyObject*)self;
 225 }
 226
 227 unsigned long OtkColor_Pixel(OtkColor *self)
 228 {
 229   if (!self->allocated)
 230     allocate(self);
 231   return self->pixel;
 232 }
 233
 234 void OtkColor_CleanupColorCache()
 235 {
 236   cleancache = True;
 237 }