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authorBehdad Esfahbod <behdad@behdad.org>2018-07-08 14:45:32 +0200
committerBehdad Esfahbod <behdad@behdad.org>2018-07-08 14:45:32 +0200
commit899841121260d62fc3f1c1728f82f5c02185dd97 (patch)
tree643abf1f58c3b627b786d3b89a103a0df956172f /utils/viewer-pangoft2.c
parent5ec478dac9146175de7ba4a1f88ebbab963f4c0f (diff)
downloadpango-899841121260d62fc3f1c1728f82f5c02185dd97.tar.gz
Rename pango-view/ dir to utils/
Diffstat (limited to 'utils/viewer-pangoft2.c')
-rw-r--r--utils/viewer-pangoft2.c162
1 files changed, 162 insertions, 0 deletions
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
+};