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Next attempt to get the reported number of lines correct for the 

"color shuffling" part.
Added more comments.
DEVEL_2_0_BRANCH-1
Karl Heinz Kremer 2001-04-01 02:28:55 +00:00
rodzic 618124e839
commit 5c9b31b16f
1 zmienionych plików z 89 dodań i 35 usunięć
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124
backend/epson.c
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@ -16,7 +16,7 @@
*/ */
#define SANE_EPSON_VERSION "SANE Epson Backend v0.2.01 - 2000-12-25" #define SANE_EPSON_VERSION "SANE Epson Backend v0.2.02 - 2001-03-31"
/* /*
This file is part of the SANE package. This file is part of the SANE package.
@ -58,8 +58,12 @@
If you do not wish that, delete this exception notice. */ If you do not wish that, delete this exception notice. */
/* /*
2000-03-31 Version 0.2.02
2001-03-17 Next attempt to get the reported number of lines correct
for the "color shuffling" part.
Added more comments.
2000-12-25 Version 0.2.01 2000-12-25 Version 0.2.01
Fixed problem with bilevel scanning with Perfection610: The Fixed problem with bilevel scanning with Perfection610: The
line count has to be an even number with this scanner. line count has to be an even number with this scanner.
Several initialization fixes regarding bit depth selection. Several initialization fixes regarding bit depth selection.
This version goes back into the CVS repository, the 1.0.4 This version goes back into the CVS repository, the 1.0.4
@ -195,6 +199,10 @@
*/ */
/* DON'T CHANGE THE NEXT LINE !!! */
/* #undef FORCE_COLOR_SHUFFLE */
#ifdef _AIX #ifdef _AIX
# include <lalloca.h> /* MUST come first for AIX! */ # include <lalloca.h> /* MUST come first for AIX! */
#endif #endif
@ -1014,8 +1022,10 @@ static SANE_Status set_resolution ( Epson_Scanner * s, int xres, int yres) {
} }
/* /*
* set_scan_area()
* *
* * Sends the "set scan area" command to the scanner with the currently selected scan area.
* This scan area is already corrected for "color shuffling" if necessary.
*/ */
static SANE_Status set_scan_area ( Epson_Scanner * s, int x, int y, int width, int height) { static SANE_Status set_scan_area ( Epson_Scanner * s, int x, int y, int width, int height) {
@ -1043,7 +1053,7 @@ static SANE_Status set_scan_area ( Epson_Scanner * s, int x, int y, int width, i
params[ 6] = height; params[ 6] = height;
params[ 7] = height >> 8; params[ 7] = height >> 8;
DBG( 1, "%p %d %d %d %d\n", ( void *) s, x, y, width, height); DBG( 1, "set_scan_area: %p %d %d %d %d\n", ( void *) s, x, y, width, height);
send( s, params, 8, &status); send( s, params, 8, &status);
status = expect_ack( s); status = expect_ack( s);
@ -1052,8 +1062,10 @@ static SANE_Status set_scan_area ( Epson_Scanner * s, int x, int y, int width, i
} }
/* /*
* set_color_correction_coefficients()
* *
* * Sends the "set color correction coefficients" command with the currently selected
* parameters to the scanner.
*/ */
static SANE_Status set_color_correction_coefficients ( Epson_Scanner * s) { static SANE_Status set_color_correction_coefficients ( Epson_Scanner * s) {
@ -1109,7 +1121,7 @@ static SANE_Status set_gamma_table ( Epson_Scanner * s) {
u_char gamma [ 257]; u_char gamma [ 257];
int n; int n;
int table; int table;
static const char gamma_cmds[] = { 'm', 'r', 'g', 'b' }; static const char gamma_cmds[] = { 'M', 'R', 'G', 'B' };
DBG( 1, "set_gamma_table: starting.\n" ); DBG( 1, "set_gamma_table: starting.\n" );
@ -1145,14 +1157,14 @@ static SANE_Status set_gamma_table ( Epson_Scanner * s) {
/* /*
* TODO: &status in send make no sense like that. * TODO: &status in send makes no sense like that.
*/ */
/* /*
When handling inverted images, we must also invert the user * When handling inverted images, we must also invert the user
supplied gamma function. This is *not* just 255-gamma - * supplied gamma function. This is *not* just 255-gamma -
this gives a negative image. * this gives a negative image.
*/ */
for( table = 0; table < 4; table++ ) { for( table = 0; table < 4; table++ ) {
gamma[0] = gamma_cmds[ table ]; gamma[0] = gamma_cmds[ table ];
@ -1183,8 +1195,11 @@ static SANE_Status set_gamma_table ( Epson_Scanner * s) {
} }
/* /*
* check_ext_status()
* *
* * Requests the extended status flag from the scanner. The "warming up" condition
* is reported as a warning (only visible if debug level is set to 10 or greater) -
* every other condition is reported as an error.
*/ */
static SANE_Status check_ext_status ( Epson_Scanner * s) { static SANE_Status check_ext_status ( Epson_Scanner * s) {
@ -1384,12 +1399,6 @@ static SANE_Status eject ( Epson_Scanner * s) {
* *
*/ */
#ifdef OBSOLETE
static Epson_Device dummy_dev =
{ { NULL, "Epson", NULL, "flatbed scanner" }
};
#endif
static int num_devices= 0; /* number of EPSON scanners attached to backend */ static int num_devices= 0; /* number of EPSON scanners attached to backend */
static Epson_Device *first_dev = NULL; /* first EPSON scanner in list */ static Epson_Device *first_dev = NULL; /* first EPSON scanner in list */
static Epson_Scanner *first_handle = NULL; static Epson_Scanner *first_handle = NULL;
@ -2138,7 +2147,7 @@ static SANE_Status init_options ( Epson_Scanner * s) {
s->opt[OPT_BIT_DEPTH].constraint_type = SANE_CONSTRAINT_WORD_LIST; s->opt[OPT_BIT_DEPTH].constraint_type = SANE_CONSTRAINT_WORD_LIST;
s->opt[OPT_BIT_DEPTH].constraint.word_list = bitDepthList; s->opt[OPT_BIT_DEPTH].constraint.word_list = bitDepthList;
s->opt[OPT_BIT_DEPTH].cap |= SANE_CAP_INACTIVE; s->opt[OPT_BIT_DEPTH].cap |= SANE_CAP_INACTIVE;
s->val[OPT_BIT_DEPTH].w = bitDepthList[1]; s->val[OPT_BIT_DEPTH].w = bitDepthList[1]; /* the first "real" element is the default */
if (bitDepthList[0] == 1) /* only one element in the list -> hide the option */ if (bitDepthList[0] == 1) /* only one element in the list -> hide the option */
s->opt[OPT_BIT_DEPTH].cap |= SANE_CAP_INACTIVE; s->opt[OPT_BIT_DEPTH].cap |= SANE_CAP_INACTIVE;
@ -3528,6 +3537,22 @@ SANE_Status sane_get_parameters ( SANE_Handle handle, SANE_Parameters * params)
s->params.pixels_per_line = SANE_UNFIX( s->val[ OPT_BR_X].w - s->val[ OPT_TL_X].w) / 25.4 * ndpi; s->params.pixels_per_line = SANE_UNFIX( s->val[ OPT_BR_X].w - s->val[ OPT_TL_X].w) / 25.4 * ndpi;
s->params.lines = SANE_UNFIX( s->val[ OPT_BR_Y].w - s->val[ OPT_TL_Y].w) / 25.4 * ndpi; s->params.lines = SANE_UNFIX( s->val[ OPT_BR_Y].w - s->val[ OPT_TL_Y].w) / 25.4 * ndpi;
/*
* Make sure that the number of lines is correct for color shuffling:
* The shuffling alghorithm produces 2xline_distance lines at the
* beginning and the same amount at the end of the scan that are not
* useable. If s->params.lines gets negative, 0 lines are reported
* back to the frontend.
*/
if (s->hw->color_shuffle)
{
s->params.lines -= 4*s->line_distance;
if (s->params.lines < 0)
{
s->params.lines = 0;
}
}
DBG( 3, "Preview = %d\n", s->val[OPT_PREVIEW].w); DBG( 3, "Preview = %d\n", s->val[OPT_PREVIEW].w);
DBG( 3, "Resolution = %d\n", s->val[OPT_RESOLUTION].w); DBG( 3, "Resolution = %d\n", s->val[OPT_RESOLUTION].w);
@ -3540,7 +3565,8 @@ SANE_Status sane_get_parameters ( SANE_Handle handle, SANE_Parameters * params)
, SANE_UNFIX( s->val[ OPT_BR_Y].w) , SANE_UNFIX( s->val[ OPT_BR_Y].w)
); );
/* Calculate bytes_per_pixel and bytes_per_line for /*
* Calculate bytes_per_pixel and bytes_per_line for
* any color depths. * any color depths.
* *
* The default color depth is stored in mode_params.depth: * The default color depth is stored in mode_params.depth:
@ -3996,38 +4022,61 @@ SANE_Status sane_start ( SANE_Handle handle)
{ {
s->line_distance = s->hw->max_line_distance * ndpi / s->hw->optical_res; s->line_distance = s->hw->max_line_distance * ndpi / s->hw->optical_res;
if (s->line_distance != 0) if (s->line_distance != 0)
{ {
s->hw->color_shuffle = SANE_TRUE; s->hw->color_shuffle = SANE_TRUE;
} }
else else
s->hw->color_shuffle = SANE_FALSE; s->hw->color_shuffle = SANE_FALSE;
} }
/*
* for debugging purposes:
*/
#ifdef FORCE_COLOR_SHUFFLE
DBG(0, "Test mode: FORCE_COLOR_SHUFFLE = TRUE\n");
s->hw->color_shuffle = SANE_TRUE;
#endif
/* modify the scan area */
/*
* Modify the scan area: If the scanner requires color shuffling, then we try to
* scan more lines to compensate for the lines that will be removed from the scan
* due to the color shuffling alghorithm.
* At this time we add two times the line distance to the number of scan lines if
* this is possible - if not, then we try to calculate the number of additional
* lines according to the selected scan area.
*/
if (s->hw->color_shuffle == SANE_TRUE) if (s->hw->color_shuffle == SANE_TRUE)
{ {
#if 0
top -= s->line_distance; /* start the scan 2*line_distance earlier */
top -= 2*s->line_distance;
if (top < 0) if (top < 0)
{ {
top = 0; top = 0;
} }
#endif
s->params.lines += 2* s->line_distance; /* scan 4*line_distance lines more */
s->params.lines += 4*s->line_distance;
} }
if (SANE_UNFIX( s->val[ OPT_BR_Y].w) / 25.4 * ndpi < s->params.lines) /*
{ * If (top + s->params.lines) is larger than the max scan area, reset
s->params.lines = (int) SANE_UNFIX(s->val[OPT_BR_Y].w) / 25.4 * ndpi + 0.5; * the number of scan lines:
} */
if (SANE_UNFIX( s->val[ OPT_BR_Y].w) / 25.4 * ndpi < (s->params.lines + top))
{
s->params.lines = ((int) SANE_UNFIX(s->val[OPT_BR_Y].w) /
25.4 * ndpi + 0.5) - top;
}
status = set_scan_area( s, left, top, s->params.pixels_per_line, s->params.lines); status = set_scan_area( s, left, top, s->params.pixels_per_line,
s->params.lines);
if( SANE_STATUS_GOOD != status) { if( SANE_STATUS_GOOD != status) {
DBG( 1, "sane_start: set_scan_area failed: %s\n", sane_strstatus( status)); DBG( 1, "sane_start: set_scan_area failed: %s\n",
sane_strstatus( status));
return status; return status;
} }
@ -4041,7 +4090,8 @@ SANE_Status sane_start ( SANE_Handle handle)
*/ */
if (((s->hw->cmd->level[0] == 'B') && if (((s->hw->cmd->level[0] == 'B') &&
( (s->hw->level >= 5) || ( (s->hw->level >= 4) && (! mode_params[s->val[ OPT_MODE].w].color)))) ( (s->hw->level >= 5) || ( (s->hw->level >= 4) &&
(! mode_params[s->val[ OPT_MODE].w].color))))
|| ( s->hw->cmd->level[0] == 'D') ) || ( s->hw->cmd->level[0] == 'D') )
{ {
s->block = SANE_TRUE; s->block = SANE_TRUE;
@ -4555,11 +4605,15 @@ START_READ:
* this time this is the only 14 bit scanner, so I'm using this information * this time this is the only 14 bit scanner, so I'm using this information
* to reverse the re-order rule. * to reverse the re-order rule.
* This has to be checked again after new 14bit scanners are released !!! * This has to be checked again after new 14bit scanners are released !!!
*
* The GT-8700 is the Asian version of the Perfection1640.
*/ */
needStrangeReorder = needStrangeReorder =
strstr(s->hw->sane.model, "1640") && strstr(s->hw->sane.model, "1640") &&
strstr(s->hw->sane.model, "Perfection") && ((strstr(s->hw->sane.model, "1640") &&
strstr(s->hw->sane.model, "Perfection")) ||
strstr(s->hw->sane.model, "GT-8700")) &&
s->params.format == SANE_FRAME_RGB && s->params.format == SANE_FRAME_RGB &&
s->hw->maxDepth == 14; s->hw->maxDepth == 14;