From 9c25532eb22532c2766b5a894ccd73c6cb8b407a Mon Sep 17 00:00:00 2001
From: auroux <auroux>
Date: Thu, 21 Jul 2011 22:07:33 +0000
Subject: [PATCH] wrapper for missing GdkPixbuf rendering function in newest
 poppler

---
 ChangeLog      |  1 +
 src/xo-file.c  |  2 +-
 src/xo-misc.c  | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/xo-misc.h  |  9 +++++
 src/xo-print.c |  2 +-
 5 files changed, 102 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c4ce61e..8be0914 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,7 @@ This version:
   - fix crash upon unplugging input devices
   - change close dialog box default to "save" (patch by Kit Barnes)
   - option to force PDF background rendering via cairo (slower but nicer)
+  - wrapper for missing GdkPixbuf rendering function in newest poppler
 
 Version 0.4.5 (Oct 2, 2009):
   - bugfixes for GTK+ 2.16/2.17 issues with xinput events
diff --git a/src/xo-file.c b/src/xo-file.c
index e26bcd1..6a1a659 100644
--- a/src/xo-file.c
+++ b/src/xo-file.c
@@ -1031,7 +1031,7 @@ gboolean bgpdf_scheduler_callback(gpointer data)
     else { // directly poppler -> pixbuf: faster, but bitmap font bug
       pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
                  FALSE, 8, scaled_width, scaled_height);
-      poppler_page_render_to_pixbuf(
+      wrapper_poppler_page_render_to_pixbuf(
                 pdfpage, 0, 0, scaled_width, scaled_height,
                 req->dpi/72, 0, pixbuf);
     }
diff --git a/src/xo-misc.c b/src/xo-misc.c
index 158b81b..65a948e 100644
--- a/src/xo-misc.c
+++ b/src/xo-misc.c
@@ -2197,3 +2197,93 @@ void install_focus_hooks(GtkWidget *w, gpointer data)
   if(GTK_IS_CONTAINER(w))
     gtk_container_forall(GTK_CONTAINER(w), install_focus_hooks, data);
 }
+
+// wrapper for missing poppler functions (defunct poppler-gdk api)
+
+static void
+wrapper_copy_cairo_surface_to_pixbuf (cairo_surface_t *surface,
+			      GdkPixbuf       *pixbuf)
+{
+  int cairo_width, cairo_height, cairo_rowstride;
+  unsigned char *pixbuf_data, *dst, *cairo_data;
+  int pixbuf_rowstride, pixbuf_n_channels;
+  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);
+
+  pixbuf_data = gdk_pixbuf_get_pixels (pixbuf);
+  pixbuf_rowstride = gdk_pixbuf_get_rowstride (pixbuf);
+  pixbuf_n_channels = gdk_pixbuf_get_n_channels (pixbuf);
+
+  if (cairo_width > gdk_pixbuf_get_width (pixbuf))
+    cairo_width = gdk_pixbuf_get_width (pixbuf);
+  if (cairo_height > gdk_pixbuf_get_height (pixbuf))
+    cairo_height = gdk_pixbuf_get_height (pixbuf);
+  for (y = 0; y < cairo_height; y++)
+    {
+      src = (unsigned int *) (cairo_data + y * cairo_rowstride);
+      dst = pixbuf_data + y * pixbuf_rowstride;
+      for (x = 0; x < cairo_width; x++) 
+	{
+	  dst[0] = (*src >> 16) & 0xff;
+	  dst[1] = (*src >> 8) & 0xff; 
+	  dst[2] = (*src >> 0) & 0xff;
+	  if (pixbuf_n_channels == 4)
+	      dst[3] = (*src >> 24) & 0xff;
+	  dst += pixbuf_n_channels;
+	  src++;
+	}
+    }
+}	
+
+void
+wrapper_poppler_page_render_to_pixbuf (PopplerPage *page,
+			       int src_x, int src_y,
+			       int src_width, int src_height,
+			       double scale,
+			       int rotation,
+			       GdkPixbuf *pixbuf)
+{
+  cairo_t *cr;
+  cairo_surface_t *surface;
+
+  surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
+					src_width, src_height);
+  cr = cairo_create (surface);
+  cairo_save (cr);
+  switch (rotation) {
+  case 90:
+	  cairo_translate (cr, src_x + src_width, -src_y);
+	  break;
+  case 180:
+	  cairo_translate (cr, src_x + src_width, src_y + src_height);
+	  break;
+  case 270:
+	  cairo_translate (cr, -src_x, src_y + src_height);
+	  break;
+  default:
+	  cairo_translate (cr, -src_x, -src_y);
+  }
+
+  if (scale != 1.0)
+	  cairo_scale (cr, scale, scale);
+
+  if (rotation != 0)
+	  cairo_rotate (cr, rotation * G_PI / 180.0);
+
+  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);
+
+  cairo_destroy (cr);
+
+  wrapper_copy_cairo_surface_to_pixbuf (surface, pixbuf);
+  cairo_surface_destroy (surface);
+}
diff --git a/src/xo-misc.h b/src/xo-misc.h
index 5be0c13..6f052da 100644
--- a/src/xo-misc.h
+++ b/src/xo-misc.h
@@ -107,6 +107,15 @@ void unset_flags(GtkWidget *w, gpointer flag);
 gboolean intercept_activate_events(GtkWidget *w, GdkEvent *ev, gpointer data);
 void install_focus_hooks(GtkWidget *w, gpointer data);
 
+// wrapper for a function no longer provided by poppler 0.17+
+void
+wrapper_poppler_page_render_to_pixbuf (PopplerPage *page,
+			       int src_x, int src_y,
+			       int src_width, int src_height,
+			       double scale,
+			       int rotation,
+			       GdkPixbuf *pixbuf);
+
 // defines for paper rulings
 
 #define RULING_MARGIN_COLOR 0xff0080ff
diff --git a/src/xo-print.c b/src/xo-print.c
index 8887984..df4afcd 100644
--- a/src/xo-print.c
+++ b/src/xo-print.c
@@ -728,7 +728,7 @@ int pdf_draw_bitmap_background(struct Page *pg, GString *str,
     width = (int) (PDFTOPPM_PRINTING_DPI * pgwidth/72.0);
     height = (int) (PDFTOPPM_PRINTING_DPI * pgheight/72.0);
     pix = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, width, height);
-    poppler_page_render_to_pixbuf(
+    wrapper_poppler_page_render_to_pixbuf(
        pdfpage, 0, 0, width, height, PDFTOPPM_PRINTING_DPI/72.0, 0, pix);
     g_object_unref(pdfpage);
   }
-- 
2.39.2