mmdolze
15f2bf4ba3
Refactor todo entries in the documentation and add them to the TODO file Document some known bugs and remove some that are known to be fixed.
90 lines
2.4 KiB
C
90 lines
2.4 KiB
C
/** \file server/drivers/lcd_lib.c
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* LCD library of useful functions for drivers.
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*
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* Drawn from the "base driver" which really was the precursor
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* to this library.
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*
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* \todo Make use of the \c options parameter to specify SEAMLESS_HBARS,
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* the height of hbars, etc.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "lcd.h"
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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/**
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* This function places a hbar using the v0.5 API format and the given cellwidth.
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* It assumes that custom chars have been statically defined, so that number
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* 1 has 1 pixel, number 2 has 2 etc.
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*
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* LCDs that have the custom chars at other char numbers than 0 should put the
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* first custom char number in cc_offset.
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*/
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void
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lib_hbar_static (Driver *drvthis, int x, int y, int len, int promille, int options, int cellwidth, int cc_offset)
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{
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int total_pixels = ((long) 2 * len * cellwidth + 1 ) * promille / 2000;
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int pos;
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for (pos = 0; pos < len; pos ++ ) {
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int pixels = total_pixels - cellwidth * pos;
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if ( pixels >= cellwidth ) {
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/* write a "full" block to the screen... */
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#if defined(SEAMLESS_HBARS)
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drvthis->chr (drvthis, x+pos, y, cellwidth + cc_offset);
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#else
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drvthis->icon (drvthis, x+pos, y, ICON_BLOCK_FILLED);
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#endif
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}
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else if ( pixels > 0 ) {
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/* write a partial block... */
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drvthis->chr (drvthis, x+pos, y, pixels + cc_offset);
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break;
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}
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else {
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; /* write nothing (not even a space) */
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}
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}
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}
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/**
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* This function places a vbar using the v0.5 API format and the given cellwidth.
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* It assumes that custom chars have been statically defined, so that number
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* 1 has 1 pixel, number 2 has 2 etc., just like in good old times.
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*
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* LCDs that have the custom chars at other char numbers than 0 should put the
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* first custom char number in cc_offset.
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*/
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void
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lib_vbar_static (Driver *drvthis, int x, int y, int len, int promille, int options, int cellheight, int cc_offset)
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{
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int total_pixels = ((long) 2 * len * cellheight + 1 ) * promille / 2000;
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int pos;
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for (pos = 0; pos < len; pos ++ ) {
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int pixels = total_pixels - cellheight * pos;
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if ( pixels >= cellheight ) {
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/* write a "full" block to the screen... */
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drvthis->icon (drvthis, x, y-pos, ICON_BLOCK_FILLED);
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}
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else if ( pixels > 0 ) {
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/* write a partial block... */
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drvthis->chr (drvthis, x, y-pos, pixels + cc_offset);
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break;
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}
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else {
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; /* write nothing (not even a space) */
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}
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}
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}
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