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lprint-testpage.c
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//
// Test page generator for LPrint, a Label Printer Application
//
// Copyright © 2021 by Michael R Sweet.
//
// Licensed under Apache License v2.0. See the file "LICENSE" for more
// information.
//
//
// Include necessary headers...
//
#include "lprint.h"
//
// 'lprintTestFilterCB()' - Print a test page.
//
bool // O - `true` on success, `false` on failure
lprintTestFilterCB(
pappl_job_t *job, // I - Job
pappl_device_t *device, // I - Output device
void *cbdata) // I - Callback data (not used)
{
pappl_pr_driver_data_t data; // Printer driver data
pappl_pr_options_t *options = papplJobCreatePrintOptions(job, 1, false);
// Print options
unsigned char *line = NULL, // Output line
*lineptr, // Pointer into line
white = 0x00, // White pixel
black = 0xff, // Black pixel
gray0 = 0xaa, // Gray pixel for even lines
gray1 = 0x55; // Gray pixel for odd lines
unsigned y, // Current position in page
ytop, yend, ybottom, // Top/end-of-image/bottom lines in page
x1mm, y1mm, // Number of bytes/rows for 2mm
pw, ph; // Image width and height
const char **pixels, // Output image pixels
*pixel; // Current output pixel
bool ret = false; // Return value
static const char *portrait[] = // Portrait label image
{
" ",
" TTT ",
" TT ",
" TT ",
" TT T ",
" TTTTTTTTTTTTTT ",
" TTTTTTTTTTTTTT ",
" TT T ",
" TT ",
" TT ",
" TTT ",
" ",
" ",
" SS SSS ",
" SS SSSSS ",
" SS SS SS ",
" SS SS SS ",
" SS SS SS ",
" SS SS SS ",
" SS SS SS ",
" SS SS SS ",
" SSSSS SS ",
" SSS SS ",
" ",
" ",
" EEE EEE ",
" EE EE ",
" EE EEEE EE ",
" EE EE EE ",
" EE EE EE ",
" EE EE EE ",
" EE EE EE ",
" EE EE EE ",
" EEEEEEEEEEEEEE ",
" EEEEEEEEEEEEEE ",
" ",
" ",
" TTT ",
" TT ",
" TT ",
" TT T ",
" TTTTTTTTTTTTTT ",
" TTTTTTTTTTTTTT ",
" TT T ",
" TT ",
" TT ",
" TTT ",
" "
};
static const char *landscape[] = // Landscape label image
{
" ",
" TTTTTTTTTT EEEEEEEEEE SSSS TTTTTTTTTT ",
" TTTTTTTTTT EEEEEEEEEE SSSSSSSS TTTTTTTTTT ",
" T TT T EE E SSS SSS T TT T ",
" TT EE SS S TT ",
" TT EE SS TT ",
" TT EE E SSS TT ",
" TT EEEEEEEE SSSS TT ",
" TT EEEEEEEE SSSS TT ",
" TT EE E SSS TT ",
" TT EE SS TT ",
" TT EE S SS TT ",
" TT EE E SSS SSS TT ",
" TT EEEEEEEEEE SSSSSSSS TT ",
" TTTT EEEEEEEEEE SSSS TTTT ",
" "
};
(void)cbdata;
// Validate options and allocate a line buffer...
if (!options)
goto done;
if ((line = malloc(options->header.cupsBytesPerLine)) == NULL)
{
papplLogJob(job, PAPPL_LOGLEVEL_ERROR, "Unable to allocate %u bytes for test page: %s", options->header.cupsBytesPerLine, strerror(errno));
goto done;
}
if ((x1mm = options->header.HWResolution[0] / 200) == 0)
x1mm = 1;
if ((y1mm = 8 * (options->header.HWResolution[1] / 200)) == 0)
y1mm = 1;
if (options->header.cupsWidth > options->header.cupsHeight)
{
// Send landscape raster...
pixels = landscape;
pw = 48;
ph = 16;
}
else
{
// Send portrait raster...
pixels = portrait;
pw = 16;
ph = 48;
}
if (((pw + 2) * x1mm) > options->header.cupsWidth || ((ph + 2) * y1mm) > options->header.cupsHeight)
{
papplLogJob(job, PAPPL_LOGLEVEL_ERROR, "Label too small to print test page.");
goto done;
}
pw *= x1mm;
ph *= y1mm;
ytop = (options->header.cupsHeight - ph) / 2;
yend = ytop + ph;
ybottom = options->header.cupsHeight - y1mm;
papplLogJob(job, PAPPL_LOGLEVEL_DEBUG, "pw=%u, ph=%u, ytop=%u, yend=%u, ybottom=%u", pw, ph, ytop, yend, ybottom);
// Start the page...
papplPrinterGetDriverData(papplJobGetPrinter(job), &data);
papplJobSetImpressions(job, 1);
if (!(data.rstartjob_cb)(job, options, device))
goto done;
if (!(data.rstartpage_cb)(job, options, device, 1))
goto done;
// Send lines for the test label:
//
// +---------------+
// |...............|
// |... ...|
// |... T E S T ...|
// |... ...|
// |...............|
// +---------------+
// Top border (2mm)
memset(line, black, options->header.cupsBytesPerLine);
for (y = 0; y < y1mm; y ++)
{
if (!(data.rwriteline_cb)(job, options, device, y, line))
goto done;
}
// Side borders and gray shading on upper half
for (; y < ytop; y ++)
{
memset(line, (y & 1) ? gray1 : gray0, options->header.cupsBytesPerLine);
memset(line, black, x1mm);
memset(line + options->header.cupsBytesPerLine - x1mm, black, x1mm);
if (!(data.rwriteline_cb)(job, options, device, y, line))
goto done;
}
// Side borders, gray shading, and image pixels in middle
for (; y < yend; y ++)
{
memset(line, (y & 1) ? gray1 : gray0, options->header.cupsBytesPerLine);
memset(line, black, x1mm);
memset(line + options->header.cupsBytesPerLine - x1mm, black, x1mm);
for (pixel = pixels[(y - ytop) / y1mm], lineptr = line + (options->header.cupsBytesPerLine - pw) / 2; *pixel; pixel ++, lineptr += x1mm)
memset(lineptr, isspace(*pixel) ? white : black, x1mm);
if (!(data.rwriteline_cb)(job, options, device, y, line))
goto done;
}
// Side borders and gray shading on lower half
for (; y < ybottom; y ++)
{
memset(line, (y & 1) ? gray1 : gray0, options->header.cupsBytesPerLine);
memset(line, black, x1mm);
memset(line + options->header.cupsBytesPerLine - x1mm, black, x1mm);
if (!(data.rwriteline_cb)(job, options, device, y, line))
goto done;
}
// Bottom border (2mm)
memset(line, black, options->header.cupsBytesPerLine);
for (; y < options->header.cupsHeight; y ++)
{
if (!(data.rwriteline_cb)(job, options, device, y, line))
goto done;
}
// Finish up...
if (!(data.rendpage_cb)(job, options, device, 1))
goto done;
if (!(data.rendjob_cb)(job, options, device))
goto done;
ret = true;
papplJobSetImpressionsCompleted(job, 1);
done:
free(line);
papplJobDeletePrintOptions(options);
return (ret);
}
//
// 'lprintTestPageCB()' - Print a test page.
//
const char * // O - Test page file
lprintTestPageCB(
pappl_printer_t *printer, // I - Printer
char *buffer, // I - Filename buffer
size_t bufsize) // I - Size of filename buffer
{
int fd; // File descriptor
char testpage[] = LPRINT_TESTPAGE_HEADER;
// Test page file header
if ((fd = papplCreateTempFile(buffer, bufsize, "testpage", "tst")) < 0)
{
papplLogPrinter(printer, PAPPL_LOGLEVEL_ERROR, "Unable to create temporary file for test page: %s", strerror(errno));
return (NULL);
}
if (write(fd, testpage, sizeof(testpage)) < 0)
{
papplLogPrinter(printer, PAPPL_LOGLEVEL_ERROR, "Unable to write temporary file for test page: %s", strerror(errno));
close(fd);
return (NULL);
}
close(fd);
return (buffer);
}