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/* 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, bytes;
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++)
bytes = 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
};
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