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-rw-r--r--backend/escl/escl_pdf.c223
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diff --git a/backend/escl/escl_pdf.c b/backend/escl/escl_pdf.c
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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