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/* sane - Scanner Access Now Easy.
Copyright (C) 2019 Thierry HUCHARD <thierry@ordissimo.com>
This file is part of the SANE package.
SANE is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your
option) any later version.
SANE is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with sane; see the file COPYING. If not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
This file implements a SANE backend for eSCL scanners. */
#define DEBUG_DECLARE_ONLY
#include "../include/sane/config.h"
#include "escl.h"
#include "../include/sane/sanei.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stddef.h>
#include <math.h>
#include <errno.h>
#if(defined HAVE_POPPLER_GLIB)
#include <poppler/glib/poppler.h>
#endif
#include <setjmp.h>
#if(defined HAVE_POPPLER_GLIB)
#define INPUT_BUFFER_SIZE 4096
static unsigned char*
set_file_in_buffer(FILE *fp, int *size)
{
char buffer[1024] = { 0 };
unsigned char *data = (unsigned char *)calloc(1, sizeof(char));
int nx = 0;
while(!feof(fp))
{
int n = fread(buffer,sizeof(char),1024,fp);
unsigned char *t = realloc(data, nx + n + 1);
if (t == NULL) {
DBG(10, "not enough memory (realloc returned NULL)");
free(data);
return NULL;
}
data = t;
memcpy(&(data[nx]), buffer, n);
nx = nx + n;
data[nx] = 0;
}
*size = nx;
return data;
}
static unsigned char *
cairo_surface_to_pixels (cairo_surface_t *surface, int bps)
{
int cairo_width, cairo_height, cairo_rowstride;
unsigned char *data, *dst, *cairo_data;
unsigned int *src;
int x, y;
cairo_width = cairo_image_surface_get_width (surface);
cairo_height = cairo_image_surface_get_height (surface);
cairo_rowstride = cairo_image_surface_get_stride (surface);
cairo_data = cairo_image_surface_get_data (surface);
data = (unsigned char*)calloc(1, sizeof(unsigned char) * (cairo_height * cairo_width * bps));
for (y = 0; y < cairo_height; y++)
{
src = (unsigned int *) (cairo_data + y * cairo_rowstride);
dst = data + y * (cairo_width * bps);
for (x = 0; x < cairo_width; x++)
{
dst[0] = (*src >> 16) & 0xff;
dst[1] = (*src >> 8) & 0xff;
dst[2] = (*src >> 0) & 0xff;
dst += bps;
src++;
}
}
return data;
}
SANE_Status
get_PDF_data(capabilities_t *scanner, int *width, int *height, int *bps)
{
cairo_surface_t *cairo_surface = NULL;
cairo_t *cr;
PopplerPage *page;
PopplerDocument *doc;
double dw, dh;
int w, h, size = 0;
char *data = NULL;
unsigned char* surface = NULL;
SANE_Status status = SANE_STATUS_GOOD;
data = (char*)set_file_in_buffer(scanner->tmp, &size);
if (!data) {
DBG(1, "Error : poppler_document_new_from_data");
status = SANE_STATUS_INVAL;
goto close_file;
}
doc = poppler_document_new_from_data(data,
size,
NULL,
NULL);
if (!doc) {
DBG(1, "Error : poppler_document_new_from_data");
status = SANE_STATUS_INVAL;
goto free_file;
}
page = poppler_document_get_page (doc, 0);
if (!page) {
DBG(1, "Error : poppler_document_get_page");
status = SANE_STATUS_INVAL;
goto free_doc;
}
poppler_page_get_size (page, &dw, &dh);
dw = (double)scanner->caps[scanner->source].default_resolution * dw / 72.0;
dh = (double)scanner->caps[scanner->source].default_resolution * dh / 72.0;
w = (int)ceil(dw);
h = (int)ceil(dh);
cairo_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, w, h);
if (!cairo_surface) {
DBG(1, "Error : cairo_image_surface_create");
status = SANE_STATUS_INVAL;
goto free_page;
}
cr = cairo_create (cairo_surface);
if (!cairo_surface) {
DBG(1, "Error : cairo_create");
status = SANE_STATUS_INVAL;
goto free_surface;
}
cairo_scale (cr, (double)scanner->caps[scanner->source].default_resolution / 72.0,
(double)scanner->caps[scanner->source].default_resolution / 72.0);
cairo_save (cr);
poppler_page_render (page, cr);
cairo_restore (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_DEST_OVER);
cairo_set_source_rgb (cr, 1, 1, 1);
cairo_paint (cr);
int st = cairo_status(cr);
if (st)
{
DBG(1, "%s", cairo_status_to_string (st));
status = SANE_STATUS_INVAL;
goto destroy_cr;
}
*bps = 3;
DBG(1, "Escl Pdf : Image Size [%dx%d]\n", w, h);
surface = cairo_surface_to_pixels (cairo_surface, *bps);
if (!surface) {
status = SANE_STATUS_NO_MEM;
DBG(1, "Escl Pdf : Surface Memory allocation problem");
goto destroy_cr;
}
// If necessary, trim the image.
surface = escl_crop_surface(scanner, surface, w, h, *bps, width, height);
if (!surface) {
DBG(1, "Escl Pdf Crop: Surface Memory allocation problem");
status = SANE_STATUS_NO_MEM;
}
destroy_cr:
cairo_destroy (cr);
free_surface:
cairo_surface_destroy (cairo_surface);
free_page:
g_object_unref (page);
free_doc:
g_object_unref (doc);
free_file:
free(data);
close_file:
if (scanner->tmp)
fclose(scanner->tmp);
scanner->tmp = NULL;
return status;
}
#else
SANE_Status
get_PDF_data(capabilities_t __sane_unused__ *scanner,
int __sane_unused__ *width,
int __sane_unused__ *height,
int __sane_unused__ *bps)
{
return (SANE_STATUS_INVAL);
}
#endif
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