143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/*------------------------------------------------------------------------
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* Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
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*
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* This file is part of the ZBar Bar Code Reader.
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*
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* The ZBar Bar Code Reader is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* The ZBar Bar Code Reader is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser Public License for more details.
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*
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* You should have received a copy of the GNU Lesser Public License
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* along with the ZBar Bar Code Reader; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* http://sourceforge.net/projects/zbar
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*------------------------------------------------------------------------*/
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#ifndef _WINDOW_H_
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#define _WINDOW_H_
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#include "config.h"
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#ifdef HAVE_INTTYPES_H
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#include <inttypes.h>
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#endif
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#include <stdlib.h>
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#include <zbar.h>
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#include "error.h"
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#include "mutex.h"
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#include "symbol.h"
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typedef struct window_state_s window_state_t;
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struct zbar_window_s {
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errinfo_t err; /* error reporting */
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zbar_image_t *image; /* last displayed image
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* NB image access must be locked!
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*/
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unsigned overlay; /* user set overlay level */
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uint32_t format; /* output format */
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unsigned width, height; /* current output size */
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unsigned max_width, max_height;
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uint32_t src_format; /* current input format */
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unsigned src_width; /* last displayed image size */
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unsigned src_height;
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unsigned dst_width; /* conversion target */
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unsigned dst_height;
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unsigned scale_num; /* output scaling */
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unsigned scale_den;
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point_t scaled_offset; /* output position and size */
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point_t scaled_size;
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uint32_t *formats; /* supported formats (zero terminated) */
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zbar_mutex_t imglock; /* lock displayed image */
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void *display;
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unsigned long xwin;
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unsigned long time; /* last image display in milliseconds */
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unsigned long time_avg; /* average of inter-frame times */
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window_state_t *state; /* platform/interface specific state */
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/* interface dependent methods */
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int (*init)(zbar_window_t *, zbar_image_t *, int);
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int (*draw_image)(zbar_window_t *, zbar_image_t *);
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int (*cleanup)(zbar_window_t *);
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};
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/* window.draw has to be thread safe wrt/other apis
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* FIXME should be a semaphore
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*/
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static inline int window_lock(zbar_window_t *w)
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{
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int rc = 0;
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if ((rc = _zbar_mutex_lock(&w->imglock))) {
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err_capture(w, SEV_FATAL, ZBAR_ERR_LOCKING, __func__,
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"unable to acquire lock");
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w->err.errnum = rc;
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return (-1);
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}
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return (0);
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}
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static inline int window_unlock(zbar_window_t *w)
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{
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int rc = 0;
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if ((rc = _zbar_mutex_unlock(&w->imglock))) {
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err_capture(w, SEV_FATAL, ZBAR_ERR_LOCKING, __func__,
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"unable to release lock");
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w->err.errnum = rc;
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return (-1);
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}
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return (0);
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}
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static inline int _zbar_window_add_format(zbar_window_t *w, uint32_t fmt)
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{
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int i;
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for (i = 0; w->formats && w->formats[i]; i++)
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if (w->formats[i] == fmt)
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return (i);
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w->formats = realloc(w->formats, (i + 2) * sizeof(uint32_t));
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w->formats[i] = fmt;
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w->formats[i + 1] = 0;
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return (i);
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}
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static inline point_t window_scale_pt(zbar_window_t *w, point_t p)
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{
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p.x = ((long)p.x * w->scale_num + w->scale_den - 1) / w->scale_den;
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p.y = ((long)p.y * w->scale_num + w->scale_den - 1) / w->scale_den;
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return (p);
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}
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/* PAL interface */
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extern int _zbar_window_attach(zbar_window_t *, void *, unsigned long);
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extern int _zbar_window_expose(zbar_window_t *, int, int, int, int);
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extern int _zbar_window_resize(zbar_window_t *);
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extern int _zbar_window_clear(zbar_window_t *);
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extern int _zbar_window_begin(zbar_window_t *);
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extern int _zbar_window_end(zbar_window_t *);
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extern int _zbar_window_draw_marker(zbar_window_t *, uint32_t, point_t);
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extern int _zbar_window_draw_polygon(zbar_window_t *, uint32_t, const point_t *,
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int);
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extern int _zbar_window_draw_text(zbar_window_t *, uint32_t, point_t,
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const char *);
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extern int _zbar_window_fill_rect(zbar_window_t *, uint32_t, point_t, point_t);
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extern int _zbar_window_draw_logo(zbar_window_t *);
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#endif
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