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Merge branch 'fix-escl-resolution-with-jpeg' into 'master' 

Fix scan all resolution with JPEG.

See merge request sane-project/backends!617
merge-requests/619/head
Ordissimo 2021-03-31 16:12:51 +00:00
rodzic de5b27c995 f99687b3cc
commit eb702d33c4
2 zmienionych plików z 30 dodań i 22 usunięć
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1
backend/escl/escl.c
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@ -1381,6 +1381,7 @@ sane_control_option(SANE_Handle h, SANE_Int n, SANE_Action a, void *v, SANE_Int
break;
case OPT_RESOLUTION:
handler->val[n].w = _get_resolution(handler, (int)(*(SANE_Word *) v));
handler->scanner->caps[handler->scanner->source].default_resolution = handler->val[n].w;
if (i)
*i |= SANE_INFO_RELOAD_PARAMS | SANE_INFO_RELOAD_OPTIONS | SANE_INFO_INEXACT;
break;

51
backend/escl/escl_jpeg.c
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@ -192,34 +192,41 @@ get_JPEG_data(capabilities_t *scanner, int *width, int *height, int *bps)
cinfo.out_color_space = JCS_RGB;
cinfo.quantize_colors = FALSE;
jpeg_calc_output_dimensions(&cinfo);
if (cinfo.output_width < (unsigned int)scanner->caps[scanner->source].width)
scanner->caps[scanner->source].width = cinfo.output_width;
if (scanner->caps[scanner->source].pos_x < 0)
scanner->caps[scanner->source].pos_x = 0;
double ratio = (double)cinfo.output_width / (double)scanner->caps[scanner->source].width;
int rw = (int)((double)scanner->caps[scanner->source].width * ratio);
int rh = (int)((double)scanner->caps[scanner->source].height * ratio);
int rx = (int)((double)scanner->caps[scanner->source].pos_x * ratio);
int ry = (int)((double)scanner->caps[scanner->source].pos_y * ratio);
if (cinfo.output_height < (unsigned int)scanner->caps[scanner->source].height)
scanner->caps[scanner->source].height = cinfo.output_height;
if (scanner->caps[scanner->source].pos_y < 0)
scanner->caps[scanner->source].pos_y = 0;
if (cinfo.output_width < (unsigned int)rw)
rw = cinfo.output_width;
if (rx < 0)
rx = 0;
if (cinfo.output_height < (unsigned int)rh)
rh = cinfo.output_height;
if (ry < 0)
ry = 0;
DBG(10, "1-JPEF Geometry [%dx%d|%dx%d]\n",
scanner->caps[scanner->source].pos_x,
scanner->caps[scanner->source].pos_y,
scanner->caps[scanner->source].width,
scanner->caps[scanner->source].height);
x_off = scanner->caps[scanner->source].pos_x;
if (x_off > (unsigned int)scanner->caps[scanner->source].width) {
w = scanner->caps[scanner->source].width;
rx,
ry,
rw,
rh);
x_off = rx;
if (x_off > (unsigned int)rw) {
w = rw;
x_off = 0;
}
else
w = scanner->caps[scanner->source].width - x_off;
y_off = scanner->caps[scanner->source].pos_y;
if(y_off > (unsigned int)scanner->caps[scanner->source].height) {
h = scanner->caps[scanner->source].height;
w = rw - x_off;
y_off = ry;
if(y_off > (unsigned int)rh) {
h = rh;
y_off = 0;
}
else
h = scanner->caps[scanner->source].height - y_off;
h = rh - y_off;
DBG(10, "2-JPEF Geometry [%dx%d|%dx%d]\n",
x_off,
y_off,
@ -242,7 +249,7 @@ get_JPEG_data(capabilities_t *scanner, int *width, int *height, int *bps)
if (y_off > 0)
jpeg_skip_scanlines(&cinfo, y_off);
pos = 0;
while (cinfo.output_scanline < (unsigned int)scanner->caps[scanner->source].height) {
while (cinfo.output_scanline < (unsigned int)rh) {
rowptr[0] = (JSAMPROW)surface + (lineSize * pos); // ..cinfo.output_scanline);
jpeg_read_scanlines(&cinfo, rowptr, (JDIMENSION) 1);
pos++;
@ -253,7 +260,7 @@ get_JPEG_data(capabilities_t *scanner, int *width, int *height, int *bps)
*width = w;
*height = h;
*bps = cinfo.output_components;
jpeg_finish_decompress(&cinfo);
// jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
fclose(scanner->tmp);
scanner->tmp = NULL;