diff options
Diffstat (limited to 'utils/viewer-pangoft2.c')
| -rw-r--r-- | utils/viewer-pangoft2.c | 162 |
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 +}; |