Allow printing multiple pages per sheet. Fixes bug #395573.

[evince.git] / backend / pdf / ev-poppler.cc

diff --git a/backend/pdf/ev-poppler.cc b/backend/pdf/ev-poppler.cc
index 4b6b114e23b7b0d97b0773c9d67694fab83b442d..38a96a533a4d75fd4b397513fce56e06a48bdbad 100644 (file)
--- a/backend/pdf/ev-poppler.cc
+++ b/backend/pdf/ev-poppler.cc
@@ -32,6 +32,9 @@
 #ifdef HAVE_CAIRO_PDF
 #include <cairo-pdf.h>
 #endif
+#ifdef HAVE_CAIRO_PS
+#include <cairo-ps.h>
+#endif
 #include <glib/gi18n.h>
 
 #include "ev-poppler.h"
@@ -49,6 +52,10 @@
 #include "ev-attachment.h"
 #include "ev-image.h"
 
+#if defined (HAVE_CAIRO_PDF) || defined (HAVE_CAIRO_PS)
+#define HAVE_CAIRO_PRINT
+#endif
+
 typedef struct {
        PdfDocument *document;
        char *text;
@@ -61,8 +68,17 @@ typedef struct {
 typedef struct {
        EvFileExporterFormat format;
        PopplerPSFile *ps_file;
-#ifdef HAVE_CAIRO_PDF
-       cairo_t *pdf_cairo;
+
+       /* Pages per sheet */
+       gint pages_per_sheet;
+       gint pages_printed;
+       gint pages_x;
+       gint pages_y;
+       gdouble page_width;
+       gdouble page_height;
+       
+#ifdef HAVE_CAIRO_PRINT
+       cairo_t *cr;
 #endif
 } PdfPrintContext;
 
@@ -1516,10 +1532,10 @@ pdf_print_context_free (PdfPrintContext *ctx)
                poppler_ps_file_free (ctx->ps_file);
                ctx->ps_file = NULL;
        }
-#ifdef HAVE_CAIRO_PDF
-       if (ctx->pdf_cairo) {
-               cairo_destroy (ctx->pdf_cairo);
-               ctx->pdf_cairo = NULL;
+#ifdef HAVE_CAIRO_PRINT
+       if (ctx->cr) {
+               cairo_destroy (ctx->cr);
+               ctx->cr = NULL;
        }
 #endif
        g_free (ctx);
@@ -1531,35 +1547,87 @@ pdf_document_file_exporter_begin (EvFileExporter        *exporter,
 {
        PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
        PdfPrintContext *ctx;
-
+       gdouble width, height;
+       gboolean change_orient = FALSE;
+#ifdef HAVE_CAIRO_PRINT
+       cairo_surface_t *surface = NULL;
+#endif
+       
        if (pdf_document->print_ctx)
                pdf_print_context_free (pdf_document->print_ctx);
        pdf_document->print_ctx = g_new0 (PdfPrintContext, 1);
        ctx = pdf_document->print_ctx;
        ctx->format = fc->format;
-       
+       ctx->pages_per_sheet = fc->pages_per_sheet;
+
+       switch (fc->pages_per_sheet) {
+               default:
+               case 1:
+                       ctx->pages_x = 1;
+                       ctx->pages_y = 1;
+                       break;
+               case 2:
+                       change_orient = TRUE;
+                       ctx->pages_x = 2;
+                       ctx->pages_y = 1;
+                       break;
+               case 4:
+                       ctx->pages_x = 2;
+                       ctx->pages_y = 2;
+                       break;
+               case 6:
+                       change_orient = TRUE;
+                       ctx->pages_x = 3;
+                       ctx->pages_y = 2;
+                       break;
+               case 9:
+                       ctx->pages_x = 3;
+                       ctx->pages_y = 3;
+                       break;
+               case 16:
+                       ctx->pages_x = 4;
+                       ctx->pages_y = 4;
+                       break;
+       }
+
+       if (change_orient) {
+               width = fc->paper_height;
+               height = fc->paper_width;
+       } else {
+               width = fc->paper_width;
+               height = fc->paper_height;
+       }
+
+       ctx->page_width = width / ctx->pages_x;
+       ctx->page_height = height / ctx->pages_y;
+
+       ctx->pages_printed = 0;
+
        switch (fc->format) {
                case EV_FILE_FORMAT_PS:
+#ifdef HAVE_CAIRO_PS
+                       surface = cairo_ps_surface_create (fc->filename, width, height);
+#else
                        ctx->ps_file = poppler_ps_file_new (pdf_document->document,
                                                            fc->filename, fc->first_page,
                                                            fc->last_page - fc->first_page + 1);
                        poppler_ps_file_set_paper_size (ctx->ps_file, fc->paper_width, fc->paper_height);
                        poppler_ps_file_set_duplex (ctx->ps_file, fc->duplex);
-
+#endif /* HAVE_CAIRO_PS */
                        break;
-               case EV_FILE_FORMAT_PDF: {
+               case EV_FILE_FORMAT_PDF:
 #ifdef HAVE_CAIRO_PDF
-                       cairo_surface_t *surface;
-                       
-                       surface = cairo_pdf_surface_create (fc->filename, fc->paper_width, fc->paper_height);
-                       ctx->pdf_cairo = cairo_create (surface);
-                       cairo_surface_destroy (surface);
+                       surface = cairo_pdf_surface_create (fc->filename, width, height);
 #endif
-               }
                        break;
                default:
                        g_assert_not_reached ();
        }
+
+#ifdef HAVE_CAIRO_PRINT
+       ctx->cr = cairo_create (surface);
+       cairo_surface_destroy (surface);
+#endif
 }
 
 static void
@@ -1569,30 +1637,41 @@ pdf_document_file_exporter_do_page (EvFileExporter  *exporter,
        PdfDocument *pdf_document = PDF_DOCUMENT (exporter);
        PdfPrintContext *ctx = pdf_document->print_ctx;
        PopplerPage *poppler_page;
+#ifdef HAVE_CAIRO_PRINT
+       gdouble page_width, page_height;
+       gint    x, y;
+#endif
 
        g_return_if_fail (pdf_document->print_ctx != NULL);
 
        poppler_page = poppler_document_get_page (pdf_document->document, rc->page);
+       
+#ifdef HAVE_CAIRO_PRINT
+       x = (ctx->pages_printed % ctx->pages_per_sheet) % ctx->pages_x;
+       y = (ctx->pages_printed % ctx->pages_per_sheet) / ctx->pages_x;
+       poppler_page_get_size (poppler_page, &page_width, &page_height);
+       
+       cairo_save (ctx->cr);
+       cairo_translate (ctx->cr,
+                        x * ctx->page_width,
+                        y * ctx->page_height);
+       cairo_scale (ctx->cr,
+                    ctx->page_width / page_width,
+                    ctx->page_height / page_height);
 
-       switch (ctx->format) {
-               case EV_FILE_FORMAT_PS:
-                       poppler_page_render_to_ps (poppler_page, ctx->ps_file);
-                       break;
-               case EV_FILE_FORMAT_PDF:
-#ifdef HAVE_CAIRO_PDF
-                       cairo_save (ctx->pdf_cairo);
-#endif
 #ifdef HAVE_POPPLER_PAGE_RENDER
-                       poppler_page_render (poppler_page, ctx->pdf_cairo);
-#endif
-#ifdef HAVE_CAIRO_PDF
-                       cairo_show_page (ctx->pdf_cairo);
-                       cairo_restore (ctx->pdf_cairo);
+       poppler_page_render (poppler_page, ctx->cr);
 #endif
-                       break;
-               default:
-                       g_assert_not_reached ();
+       ctx->pages_printed++;
+                       
+       if (ctx->pages_printed % ctx->pages_per_sheet == 0) {
+               cairo_show_page (ctx->cr);
        }
+       cairo_restore (ctx->cr);
+#else /* HAVE_CAIRO_PRINT */
+       if (ctx->format == EV_FILE_FORMAT_PS)
+               poppler_page_render_to_ps (poppler_page, ctx->ps_file);
+#endif /* HAVE_CAIRO_PRINT */
        
        g_object_unref (poppler_page);
 }
@@ -1615,6 +1694,14 @@ pdf_document_file_exporter_get_capabilities (EvFileExporter *exporter)
                EV_FILE_EXPORTER_CAN_COLLATE |
                EV_FILE_EXPORTER_CAN_REVERSE |
                EV_FILE_EXPORTER_CAN_SCALE |
+#ifdef HAVE_CAIRO_PRINT
+#ifdef HAVE_POPPLER_PAGE_RENDER
+#if GTK_CHECK_VERSION (2, 11, 1)
+               EV_FILE_EXPORTER_CAN_NUMBER_UP |
+#endif
+#endif
+#endif
+               
 #ifdef HAVE_CAIRO_PDF
 #ifdef HAVE_POPPLER_PAGE_RENDER
                EV_FILE_EXPORTER_CAN_GENERATE_PDF |