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alloc colors.. i think!

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This commit is contained in:
Dana Jansens 2003-02-12 06:14:25 +00:00
parent 6b1381d69d
commit dd89811570
1 changed files with 63 additions and 8 deletions
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71
otk/pseudorendercontrol.cc
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@ -26,24 +26,79 @@ PseudoRenderControl::PseudoRenderControl(int screen)
const ScreenInfo *info = display->screenInfo(_screen);
int depth = info->depth();
_cpc = 4; // XXX THIS SHOULD BE A USER OPTION
_ncolors = _cpc * _cpc * _cpc;
_bpc = 2; // XXX THIS SHOULD BE A USER OPTION
assert(_bpc >= 1);
_ncolors = 1 << (_bpc * 3);
if (_cpc < 2 || _ncolors > 1 << depth) {
if (_ncolors > 1 << depth) {
fprintf(stderr,
_("PseudoRenderControl: Invalid colormap size. Using maximum size
available.\n"));
_cpc = 1 << (depth/3);
_ncolors = 1 << depth; // _cpc * _cpc * _cpc
_("PseudoRenderControl: Invalid colormap size. Resizing.\n"));
_bpc = 1 << (depth/3) >> 3;
_ncolors = 1 << (_bpc * 3);
}
_cpc = 1 << _bpc;
if (!(_colors = new XColor[_ncolors])) {
fprintf(stderr,
_("PseudoRenderControl: error allocating colormap\n"));
::exit(1);
}
// build a color cube
for (int n = _ncolors - 1,
r = (1 << (_bpc + 1)) -1, i = 0; i < _cpc; r >>= 1, ++i)
for (int g = (1 << (_bpc + 1)) -1, j = 0; j < _cpc; g >>= 1, ++j)
for (int b = (1 << (_bpc + 1)) -1, k = 0; k < _cpc; b >>= 1, ++k, --n) {
_colors[n].red = r | r << 8;
_colors[n].green = g | g << 8;
_colors[n].blue = b | b << 8;
_colors[n].flags = DoRed|DoGreen|DoBlue; // used to track allocation
}
// allocate the colors
for (int i = 0; i < _ncolors; i++)
if (!XAllocColor(**display, info->colormap(), &_colors[i]))
_colors[i].flags = 0; // mark it as unallocated
// try allocate any colors that failed allocation above
// get the allocated values from the X server (only the first 256 XXX why!?)
XColor icolors[256];
int incolors = (((1 << depth) > 256) ? 256 : (1 << depth));
for (int i = 0; i < incolors; i++)
icolors[i].pixel = i;
XQueryColors(**display, info->colormap(), icolors, incolors);
// try match unallocated ones
for (int i = 0; i < _ncolors; i++) {
if (!_colors[i].flags) { // if it wasn't allocated...
unsigned long closest = 0xffffffff, close = 0;
for (int ii = 0; ii < incolors; ii++) {
// find deviations
int r = (_colors[i].red - icolors[ii].red) & 0xff;
int g = (_colors[i].green - icolors[ii].green) & 0xff;
int b = (_colors[i].blue - icolors[ii].blue) & 0xff;
// find a weighted absolute deviation
unsigned long dev = (r * r) + (g * g) + (b * b);
if (dev < closest) {
closest = dev;
close = ii;
}
}
_colors[i].red = icolors[close].red;
_colors[i].green = icolors[close].green;
_colors[i].blue = icolors[close].blue;
// try alloc this closest color, it had better succeed!
if (XAllocColor(**display, info->colormap(), &_colors[i]))
_colors[i].flags = DoRed|DoGreen|DoBlue; // mark as alloced
else
assert(false); // wtf has gone wrong, its already alloced for chissake!
}
}
}
PseudoRenderControl::~PseudoRenderControl()