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make lineart work when number of segments is higher than 1

merge-requests/1/head
Stphane Voltz 2011-01-03 21:35:44 +01:00
rodzic dd2a64e9a4
commit de2af06d35
1 zmienionych plików z 85 dodań i 24 usunięć
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109
backend/genesys.c
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@ -4790,6 +4790,13 @@ genesys_fill_segmented_buffer (Genesys_Device * dev, uint8_t *work_buffer_dst, s
{
size_t count;
SANE_Status status;
uint8_t odd,even,mask;
uint16_t merged;
int depth,i;
depth = dev->settings.depth;
if (dev->settings.scan_mode == SCAN_MODE_LINEART)
depth = 1;
/* fill buffer if needed */
if (dev->oe_buffer.avail == 0)
@ -4817,32 +4824,86 @@ genesys_fill_segmented_buffer (Genesys_Device * dev, uint8_t *work_buffer_dst, s
count++;
dev->cur++;
}
else if(dev->settings.depth==8 && dev->settings.double_xres==SANE_FALSE)
else
{
while (dev->cur < dev->len && count < size)
{
/* copy even pixel */
work_buffer_dst[count] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->oe_buffer.pos];
/* copy odd pixel */
work_buffer_dst[count + 1] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->dist + dev->oe_buffer.pos];
/* update counter and pointer */
count += 2;
dev->cur++;
/* here we must handle the segments to copy data */
if(dev->segnb==2)
{
if(depth==8)
{
while (dev->cur < dev->len && count < size)
{
/* copy even pixel */
work_buffer_dst[count] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->oe_buffer.pos];
/* copy odd pixel */
work_buffer_dst[count + 1] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->dist + dev->oe_buffer.pos];
/* update counter and pointer */
count += 2;
dev->cur++;
}
}
else if(depth==16)
{
while (dev->cur < dev->len && count < size)
{
/* copy even pixel */
work_buffer_dst[count] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->oe_buffer.pos];
work_buffer_dst[count+1] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->oe_buffer.pos+1];
/* copy odd pixel */
work_buffer_dst[count + 2] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->dist + dev->oe_buffer.pos];
work_buffer_dst[count + 3] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->dist + dev->oe_buffer.pos+1];
/* update counter and pointer */
count += 4;
dev->cur+=2;
}
} else { /* lineart case */
while (dev->cur < dev->len && count < size)
{
/* get values to merge */
odd = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->oe_buffer.pos];
even = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->dist + dev->oe_buffer.pos];
/* interleave bits .... */
merged=0;
for(i=7;i>=0;i--)
{
mask=1<<i;
if(odd & mask)
{
merged |= 1;
}
merged<<=1;
if(even & mask)
{
merged |= 1;
}
/* don't shift on last bit */
if(i>0)
{
merged<<=1;
}
}
/* store result */
work_buffer_dst[count] = merged >> 8;
work_buffer_dst[count+1] = merged & 255;
/* update counter and pointer */
count += 2;
dev->cur++;
}
}
}
}
else if(dev->settings.depth==16 && dev->settings.double_xres==SANE_FALSE)
{
while (dev->cur < dev->len && count < size)
{
/* copy even pixel */
work_buffer_dst[count] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->oe_buffer.pos];
work_buffer_dst[count+1] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->oe_buffer.pos+1];
/* copy odd pixel */
work_buffer_dst[count + 2] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->dist + dev->oe_buffer.pos];
work_buffer_dst[count + 3] = dev->oe_buffer.buffer[dev->cur + dev->skip + dev->dist + dev->oe_buffer.pos+1];
/* update counter and pointer */
count += 4;
dev->cur+=2;
else if(dev->segnb==4)
{
DBG (DBG_error, "%s: %d is an unimplemented segment number ....\n",__FUNCTION__,dev->segnb);
return SANE_STATUS_INVAL;
}
else
{
DBG (DBG_error, "%s: %d is an unimplemented segment number ....\n",__FUNCTION__,dev->segnb);
return SANE_STATUS_INVAL;
}
}