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update search strip function with improvements done for gl841 part

merge-requests/1/head
Stphane Voltz 2009-10-07 06:17:12 +02:00
rodzic a11150afed
commit 8a6f2ed22e
1 zmienionych plików z 64 dodań i 16 usunięć
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80
backend/genesys_gl646.c
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@ -4673,37 +4673,85 @@ gl646_search_strip (Genesys_Device * dev, SANE_Bool forward, SANE_Bool black)
}
/* search data to find black strip */
for (y = 0; y < settings.lines && !found; y++)
/* when searching forward, we only need one line of the searched color since we
* will scan forward. But when doing backward search, we need all the area of the
* same color */
if (forward)
{
/* count of white/black pixels depending on the color searched */
count = 0;
for (x = 0; x < settings.pixels; x++)
for (y = 0; y < settings.lines && !found; y++)
{
/* when searching for black, detect white pixels */
if (black && data[y * settings.pixels + x] > 60)
count = 0;
/* count of white/black pixels depending on the color searched */
for (x = 0; x < settings.pixels; x++)
{
count++;
/* when searching for black, detect white pixels */
if (black && data[y * settings.pixels + x] > 60)
{
count++;
}
/* when searching for white, detect black pixels */
if (!black && data[y * settings.pixels + x] < 60)
{
count++;
}
}
/* when searching for white, detect black pixels */
if (!black && data[y * settings.pixels + x] < 60)
/* at end of line, if count >= 3%, line is not fully of the desired color
* so we must go to next line of the buffer */
/* count*100/pixels < 3 */
if ((count * 100) / settings.pixels < 3)
{
count++;
found = 1;
DBG (DBG_data,
"gl841_search_strip: strip found forward during pass %d at line %d\n",
pass, y);
}
else
{
DBG (DBG_data, "gl841_search_strip: pixels=%d, count=%d\n",
settings.pixels, count);
}
}
}
else /* since calibration scans are done forward, we need the whole area
to be of the required color when searching backward */
{
count = 0;
for (y = 0; y < settings.lines; y++)
{
/* count of white/black pixels depending on the color searched */
for (x = 0; x < settings.pixels; x++)
{
/* when searching for black, detect white pixels */
if (black && data[y * settings.pixels + x] > 60)
{
count++;
}
/* when searching for white, detect black pixels */
if (!black && data[y * settings.pixels + x] < 60)
{
count++;
}
}
}
/* at end of line, if count >0, line is not fully of the desired color
* so we must go to next line of the buffer */
if (count == 0)
/* at end of area, if count >= 3%, area is not fully of the desired color
* so we must go to next buffer */
if ((count * 100) / (settings.pixels * settings.lines) < 3)
{
found = 1;
DBG (DBG_data,
"gl646_search_strip: strip found during pass %d at line %d\n",
pass, y);
"gl841_search_strip: strip found backward during pass %d \n", pass);
}
else
{
DBG (DBG_data, "gl841_search_strip: pixels=%d, count=%d\n",
settings.pixels, count);
}
}
free (data);
pass++;
}
free (data);
if (found)
{
status = SANE_STATUS_GOOD;