From 899841121260d62fc3f1c1728f82f5c02185dd97 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Sun, 8 Jul 2018 14:45:32 +0200
Subject: Rename pango-view/ dir to utils/

---
 utils/viewer-pangoft2.c | 162 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 utils/viewer-pangoft2.c

(limited to 'utils/viewer-pangoft2.c')

diff --git a/utils/viewer-pangoft2.c b/utils/viewer-pangoft2.c
new file mode 100644
index 00000000..87973c80
--- /dev/null
+++ b/utils/viewer-pangoft2.c
@@ -0,0 +1,162 @@
+/* viewer-pangoft2.c: PangoFT2 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 <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "viewer-render.h"
+#include "viewer.h"
+
+#include <pango/pangoft2.h>
+
+static void
+substitute_func (FcPattern *pattern,
+		 gpointer   data G_GNUC_UNUSED)
+{
+  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
+pangoft2_view_create (const PangoViewer *klass G_GNUC_UNUSED)
+{
+  PangoFontMap *fontmap;
+  fontmap = pango_ft2_font_map_new ();
+
+  pango_ft2_font_map_set_resolution (PANGO_FT2_FONT_MAP (fontmap), opt_dpi, opt_dpi);
+  pango_ft2_font_map_set_default_substitute (PANGO_FT2_FONT_MAP (fontmap), substitute_func, NULL, NULL);
+
+  return fontmap;
+}
+
+static void
+pangoft2_view_destroy (gpointer instance)
+{
+  g_object_unref (instance);
+}
+
+static PangoContext *
+pangoft2_view_get_context (gpointer instance)
+{
+  return pango_font_map_create_context (PANGO_FONT_MAP (instance));
+}
+
+static gpointer
+pangoft2_view_create_surface (gpointer instance G_GNUC_UNUSED,
+			      int      width,
+			      int      height)
+{
+  FT_Bitmap *bitmap;
+
+  bitmap = g_slice_new (FT_Bitmap);
+  bitmap->width = width;
+  bitmap->pitch = (bitmap->width + 3) & ~3;
+  bitmap->rows = height;
+  bitmap->buffer = g_malloc (bitmap->pitch * bitmap->rows);
+  bitmap->num_grays = 256;
+  bitmap->pixel_mode = ft_pixel_mode_grays;
+  memset (bitmap->buffer, 0x00, bitmap->pitch * bitmap->rows);
+
+  return bitmap;
+}
+
+static void
+pangoft2_view_destroy_surface (gpointer instance G_GNUC_UNUSED,
+			       gpointer surface)
+{
+  FT_Bitmap *bitmap = (FT_Bitmap *) surface;
+
+  g_free (bitmap->buffer);
+  g_slice_free (FT_Bitmap, bitmap);
+}
+
+static void
+render_callback (PangoLayout *layout,
+		 int          x,
+		 int          y,
+		 gpointer     context,
+		 gpointer     state G_GNUC_UNUSED)
+{
+  pango_ft2_render_layout ((FT_Bitmap *)context,
+			   layout,
+			   x, y);
+}
+
+static void
+pangoft2_view_render (gpointer      instance G_GNUC_UNUSED,
+		      gpointer      surface,
+		      PangoContext *context,
+		      int          *width,
+		      int          *height,
+		      gpointer      state)
+{
+  int pix_idx;
+  FT_Bitmap *bitmap = (FT_Bitmap *) surface;
+
+  do_output (context, render_callback, NULL, surface, state, width, height);
+
+  for (pix_idx=0; pix_idx<bitmap->pitch * bitmap->rows; pix_idx++)
+    bitmap->buffer[pix_idx] = 255 - bitmap->buffer[pix_idx];
+}
+
+static void
+pangoft2_view_write (gpointer instance G_GNUC_UNUSED,
+		     gpointer surface,
+		     FILE    *stream,
+		     int      width,
+		     int      height)
+{
+  int row;
+  FT_Bitmap *bitmap = (FT_Bitmap *) surface;
+
+  /* Write it as pgm to output */
+  fprintf(stream,
+	  "P5\n"
+	  "%d %d\n"
+	  "255\n", width, height);
+  for (row = 0; row < height; row++)
+    fwrite (bitmap->buffer + row * bitmap->pitch, 1, width, stream);
+}
+
+const PangoViewer pangoft2_viewer = {
+  "PangoFT2",
+  "ft2",
+  ".pgm",
+  pangoft2_view_create,
+  pangoft2_view_destroy,
+  pangoft2_view_get_context,
+  pangoft2_view_create_surface,
+  pangoft2_view_destroy_surface,
+  pangoft2_view_render,
+  pangoft2_view_write,
+  NULL,
+  NULL,
+  NULL
+};
-- 
cgit v1.2.1