mirror of
https://invent.kde.org/graphics/okular
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98 lines
3 KiB
C
98 lines
3 KiB
C
#define EXTERN
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#define INIT(x) =x
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#include "oconfig.h"
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struct WindowRec mane = {(Window) 0, 3, 0, 0, 0, 0, MAXDIM, 0, MAXDIM, 0};
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struct WindowRec currwin = {(Window) 0, 3, 0, 0, 0, 0, MAXDIM, 0, MAXDIM, 0};
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void
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init_pix(warn)
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Boolean warn;
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{
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static int shrink_allocated_for = 0;
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static Boolean colors_allocated = False;
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static int _copy = 0;
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int i;
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if (!colors_allocated)
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{
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Pixel plane_masks[4];
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Pixel pixel;
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XColor color, fc, bc;
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XGCValues values;
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if ( _gamma == 0.0) _gamma = 1.0;
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if (!_copy)
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/* allocate 4 color planes for 16 colors (for GXor drawing) */
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if (!XAllocColorCells(DISP, DefaultColormapOfScreen(SCRN),
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False, plane_masks, 4, &pixel, 1))
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_copy = True;
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/* get foreground and background RGB values for interpolating */
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fc.pixel = _fore_Pixel;
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XQueryColor(DISP, DefaultColormapOfScreen(SCRN), &fc);
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bc.pixel = _back_Pixel;
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XQueryColor(DISP, DefaultColormapOfScreen(SCRN), &bc);
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for (i = 0; i < 16; ++i) {
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double pow();
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double frac = _gamma > 0 ? pow((double) i / 15, 1 / _gamma)
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: 1 - pow((double) (15 - i) / 15, -_gamma);
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color.red = frac * ((double) fc.red - bc.red) + bc.red;
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color.green = frac * ((double) fc.green - bc.green) + bc.green;
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color.blue = frac * ((double) fc.blue - bc.blue) + bc.blue;
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color.pixel = pixel;
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color.flags = DoRed | DoGreen | DoBlue;
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if (!_copy) {
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if (i & 1) color.pixel |= plane_masks[0];
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if (i & 2) color.pixel |= plane_masks[1];
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if (i & 4) color.pixel |= plane_masks[2];
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if (i & 8) color.pixel |= plane_masks[3];
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XStoreColor(DISP, DefaultColormapOfScreen(SCRN), &color);
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palette[i] = color.pixel;
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}
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else {
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if (!XAllocColor(DISP, DefaultColormapOfScreen(SCRN),
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&color))
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palette[i] = (i * 100 >= density * 15)
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? _fore_Pixel : _back_Pixel;
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else
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palette[i] = color.pixel;
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}
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}
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/* Make sure fore_ and back_Pixel are a part of the palette */
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_fore_Pixel = palette[15];
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_back_Pixel = palette[0];
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if (mane.win != (Window) 0)
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XSetWindowBackground(DISP, mane.win, palette[0]);
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/* set the GC for inserting characters into the main bitmap
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* so that already drawn characters will not be overdrawn */
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values.function = GXand;
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values.foreground = _fore_Pixel;
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values.background = _back_Pixel;
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foreGC = ruleGC =
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XCreateGC(DISP, RootWindowOfScreen(SCRN),GCFunction|GCForeground|GCBackground, &values);
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colors_allocated = True;
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}
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if (shrink_allocated_for < mane.shrinkfactor) {
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if (pixeltbl != NULL) free((char *) pixeltbl);
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pixeltbl = (Pixel *) xmalloc((unsigned)
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(mane.shrinkfactor * mane.shrinkfactor + 1) * sizeof(Pixel),
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"pixel table");
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shrink_allocated_for = mane.shrinkfactor;
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}
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for (i = 0; i <= mane.shrinkfactor * mane.shrinkfactor; ++i)
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pixeltbl[i] =
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palette[(i * 30 + mane.shrinkfactor * mane.shrinkfactor)
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/ (2 * mane.shrinkfactor * mane.shrinkfactor)];
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}
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