17 lines
525 B
C
17 lines
525 B
C
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#include "libi3.h"
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#include <math.h>
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extern xcb_screen_t *root_screen;
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/*
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* Convert a logical amount of pixels (e.g. 2 pixels on a “standard” 96 DPI
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* screen) to a corresponding amount of physical pixels on a standard or retina
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* screen, e.g. 5 pixels on a 227 DPI MacBook Pro 13" Retina screen.
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*
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*/
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int logical_px(const int logical) {
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const double dpi = (double)root_screen->height_in_pixels * 25.4 /
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(double)root_screen->height_in_millimeters;
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return ceil((dpi / 96.0) * logical);
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}
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