Bug 328067 – Install pango-view

2006-02-06  Behdad Esfahbod  <behdad@gnome.org>

        Bug 328067 – Install pango-view

        Added a rather generic framework for a pango-view example.  All
        backends have their own pango*-view built, and a pango-view binary
        is built too, that can choose backend via --backend.  This one is
        installed in bindir.

        * examples/Makefile.am: Updated, to build pangox-view, pangoft2-view,
        pangoxft-view, pangocairo-view, and pango-view.

        * examples/viewer.h, examples/viewer-x.c, examples/viewer-x.h
        examples/viewer-cairo.c, examples/viewer-cairo.h,
        examples/viewer-main.c, examples/viewer-pangox.c,
        examples/viewer-pangoft2.c, examples/viewer-pangoxft.c,
        examples/viewer-pangocairo.c, examples/pango-view.c,
        examples/pango-xview.c, examples/pango-ft2view.c,
        examples/pango-xftview.c, examples/pango-cairoview.c: Added.

        * examples/cairoview.c, examples/xftview.c, examples/pangoft2topgm.c,
        examples/viewer-qt.cc, examples/viewer-qt.h: Removed.

        * configure.in: Check for Cairo Xlib backend, also AC_DEFINE various
        backend bits.

1 files changed, 151 insertions, 0 deletions

diff --git a/examples/viewer-pangoxft.c b/examples/viewer-pangoxft.c
new file mode 100644
index 00000000..497c17af
--- /dev/null
+++ b/examples/viewer-pangoxft.c
@@ -0,0 +1,151 @@
+/* viewer-pangoxft.c: PangoXft viewer backend.
+ *
+ * Copyright (C) 1999,2004,2005 Red Hat, Inc.
+ * Copyright (C) 2001 Sun Microsystems
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#include <config.h>
+
+#include "renderdemo.h"
+#include "viewer-x.h"
+
+#include <pango/pangoxft.h>
+
+static void
+default_substitute (FcPattern *pattern,
+		    gpointer   data)
+{
+  FcPatternDel (pattern, FC_DPI);
+  FcPatternAddInteger (pattern, FC_DPI, opt_dpi);
+
+  if (opt_hinting != HINT_DEFAULT)
+    {
+      FcPatternDel (pattern, FC_HINTING);
+      FcPatternAddBool (pattern, FC_HINTING, opt_hinting != HINT_NONE);
+      
+      FcPatternDel (pattern, FC_AUTOHINT);
+      FcPatternAddBool (pattern, FC_AUTOHINT, opt_hinting == HINT_AUTO);
+    }
+}
+
+static gpointer
+pangoxft_view_create (const PangoViewer *klass)
+{
+  XViewer *instance;
+
+  instance = x_view_create (klass);
+
+  XftInit (NULL);
+
+  pango_xft_set_default_substitute (instance->display, instance->screen,
+				    default_substitute, NULL, NULL);
+
+  return instance;
+}
+
+static void 
+pangoxft_view_destroy (gpointer instance)
+{
+  XViewer *x = (XViewer *)instance;
+
+  pango_xft_shutdown_display (x->display, x->screen);
+
+  x_view_destroy (instance);
+}
+
+static PangoContext *
+pangoxft_view_get_context (gpointer instance)
+{
+  XViewer *x = (XViewer *) instance;
+
+  return pango_xft_get_context (x->display, x->screen);
+}
+
+typedef struct 
+{
+  XftDraw *draw;
+  XftColor color;
+} MyXftContext;
+
+static void
+render_callback (PangoLayout *layout,
+		 int          x,
+		 int          y,
+		 gpointer     context,
+		 gpointer     state)
+{
+  MyXftContext *xft_context = (MyXftContext *) context;
+
+  pango_xft_render_layout (xft_context->draw,
+			   &xft_context->color,
+			   layout,
+			   x, y);
+}
+
+static void 
+pangoxft_view_render (gpointer      instance,
+		      gpointer      surface,
+		      PangoContext *context,
+		      int           width,
+		      int           height,
+		      gpointer      state)
+{
+  XViewer *x = (XViewer *) instance;
+  Pixmap pixmap = (Pixmap) surface;
+  MyXftContext xft_context;
+  XftDraw *draw;
+  XftColor color;
+
+  draw = XftDrawCreate (x->display, pixmap,
+			DefaultVisual (x->display, x->screen),
+			DefaultColormap (x->display, x->screen));
+
+  color.color.red = 0xffff;
+  color.color.blue = 0xffff;
+  color.color.green = 0xffff;
+  color.color.alpha = 0xffff;
+
+  XftDrawRect (draw, &color, 0, 0, width, height);
+
+  color.color.red = 0x0;
+  color.color.green = 0x0;
+  color.color.blue = 0x0;
+  color.color.alpha = 0xffff;
+
+  xft_context.draw = draw;
+  xft_context.color = color;
+
+  do_output (context, render_callback, NULL, &xft_context, state, NULL, NULL);
+
+  XftDrawDestroy (draw);
+}
+
+const PangoViewer pangoxft_viewer = {
+  "PangoXft",
+  "xft",
+  NULL,
+  pangoxft_view_create,
+  pangoxft_view_destroy,
+  pangoxft_view_get_context,
+  x_view_create_surface,
+  x_view_destroy_surface,
+  pangoxft_view_render,
+  NULL,
+  x_view_create_window,
+  x_view_destroy_window,
+  x_view_display
+};