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/*------------------------------------------------------------------------
* Copyright 2007-2009 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
#include "image.h"
#include "window.h"
#include "x.h"
static int ximage_cleanup(zbar_window_t *w)
{
window_state_t *x = w->state;
if (x->img.x)
free(x->img.x);
x->img.x = NULL;
return (0);
}
static inline int ximage_init(zbar_window_t *w, zbar_image_t *img,
int format_change)
{
ximage_cleanup(w);
XImage *ximg = w->state->img.x = calloc(1, sizeof(XImage));
ximg->width = img->width;
ximg->height = img->height;
ximg->format = ZPixmap;
ximg->byte_order = LSBFirst;
ximg->bitmap_unit = 8;
ximg->bitmap_bit_order = MSBFirst;
ximg->bitmap_pad = 8;
const zbar_format_def_t *fmt = _zbar_format_lookup(w->format);
if (fmt->group == ZBAR_FMT_RGB_PACKED) {
ximg->depth = ximg->bits_per_pixel = fmt->p.rgb.bpp << 3;
ximg->red_mask = (0xff >> RGB_SIZE(fmt->p.rgb.red))
<< RGB_OFFSET(fmt->p.rgb.red);
ximg->green_mask = (0xff >> RGB_SIZE(fmt->p.rgb.green))
<< RGB_OFFSET(fmt->p.rgb.green);
ximg->blue_mask = (0xff >> RGB_SIZE(fmt->p.rgb.blue))
<< RGB_OFFSET(fmt->p.rgb.blue);
} else {
ximg->depth = ximg->bits_per_pixel = 8;
ximg->red_mask = ximg->green_mask = ximg->blue_mask = 0xff;
}
if (!XInitImage(ximg))
return (err_capture_int(w, SEV_ERROR, ZBAR_ERR_XPROTO, __func__,
"unable to init XImage for format %x",
w->format));
w->dst_width = img->width;
w->dst_height = img->height;
/* FIXME implement some basic scaling */
w->scale_num = w->scale_den = 1;
zprintf(3,
"new XImage %.4s(%08" PRIx32 ") %dx%d"
" from %.4s(%08" PRIx32 ") %dx%d\n",
(char *)&w->format, w->format, ximg->width, ximg->height,
(char *)&img->format, img->format, img->width, img->height);
zprintf(4, " masks: %08lx %08lx %08lx\n", ximg->red_mask,
ximg->green_mask, ximg->blue_mask);
return (0);
}
static int ximage_draw(zbar_window_t *w, zbar_image_t *img)
{
window_state_t *x = w->state;
XImage *ximg = x->img.x;
assert(ximg);
ximg->data = (void *)img->data;
point_t src = { 0, 0 };
point_t dst = w->scaled_offset;
if (dst.x < 0) {
src.x = -dst.x;
dst.x = 0;
}
if (dst.y < 0) {
src.y = -dst.y;
dst.y = 0;
}
point_t size = w->scaled_size;
if (size.x > w->width)
size.x = w->width;
if (size.y > w->height)
size.y = w->height;
XPutImage(w->display, w->xwin, x->gc, ximg, src.x, src.y, dst.x, dst.y,
size.x, size.y);
ximg->data = NULL;
return (0);
}
static uint32_t ximage_formats[4][5] = {
{ /* 8bpp */
/* FIXME fourcc('Y','8','0','0'), */
fourcc('R', 'G', 'B', '1'), fourcc('B', 'G', 'R', '1'), 0 },
{ /* 16bpp */
fourcc('R', 'G', 'B', 'P'), fourcc('R', 'G', 'B', 'O'),
fourcc('R', 'G', 'B', 'R'), fourcc('R', 'G', 'B', 'Q'), 0 },
{ /* 24bpp */
fourcc('R', 'G', 'B', '3'), fourcc('B', 'G', 'R', '3'), 0 },
{ /* 32bpp */
fourcc('R', 'G', 'B', '4'), fourcc('B', 'G', 'R', '4'), 0 },
};
static int ximage_probe_format(zbar_window_t *w, uint32_t format)
{
const zbar_format_def_t *fmt = _zbar_format_lookup(format);
XVisualInfo visreq, *visuals = NULL;
memset(&visreq, 0, sizeof(XVisualInfo));
visreq.depth = fmt->p.rgb.bpp << 3;
visreq.red_mask = (0xff >> RGB_SIZE(fmt->p.rgb.red))
<< RGB_OFFSET(fmt->p.rgb.red);
visreq.green_mask = (0xff >> RGB_SIZE(fmt->p.rgb.green))
<< RGB_OFFSET(fmt->p.rgb.green);
visreq.blue_mask = (0xff >> RGB_SIZE(fmt->p.rgb.blue))
<< RGB_OFFSET(fmt->p.rgb.blue);
int n;
visuals = XGetVisualInfo(w->display,
VisualDepthMask | VisualRedMaskMask |
VisualGreenMaskMask | VisualBlueMaskMask,
&visreq, &n);
zprintf(8, "bits=%d r=%08lx g=%08lx b=%08lx: n=%d visuals=%p\n",
visreq.depth, visreq.red_mask, visreq.green_mask, visreq.blue_mask,
n, visuals);
if (!visuals)
return (1);
XFree(visuals);
if (!n)
return (-1);
return (0);
}
int _zbar_window_probe_ximage(zbar_window_t *w)
{
/* FIXME determine supported formats/depths */
int n;
XPixmapFormatValues *formats = XListPixmapFormats(w->display, &n);
if (!formats)
return (err_capture(w, SEV_ERROR, ZBAR_ERR_XPROTO, __func__,
"unable to query XImage formats"));
int i;
for (i = 0; i < n; i++) {
if (formats[i].depth & 0x7 || formats[i].depth > 0x20) {
zprintf(2, " [%d] depth=%d bpp=%d: not supported\n", i,
formats[i].depth, formats[i].bits_per_pixel);
continue;
}
int fmtidx = formats[i].depth / 8 - 1;
int j, n = 0;
for (j = 0; ximage_formats[fmtidx][j]; j++)
if (!ximage_probe_format(w, ximage_formats[fmtidx][j])) {
zprintf(2, " [%d] depth=%d bpp=%d: %.4s(%08" PRIx32 ")\n", i,
formats[i].depth, formats[i].bits_per_pixel,
(char *)&ximage_formats[fmtidx][j],
ximage_formats[fmtidx][j]);
_zbar_window_add_format(w, ximage_formats[fmtidx][j]);
n++;
}
if (!n)
zprintf(2, " [%d] depth=%d bpp=%d: no visuals\n", i,
formats[i].depth, formats[i].bits_per_pixel);
}
XFree(formats);
if (!w->formats || !w->formats[0])
return (err_capture(w, SEV_ERROR, ZBAR_ERR_UNSUPPORTED, __func__,
"no usable XImage formats found"));
w->init = ximage_init;
w->draw_image = ximage_draw;
w->cleanup = ximage_cleanup;
return (0);
}
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