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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* GimpText
* Copyright (C) 2003 Sven Neumann <sven@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <glib-object.h>
#define PANGO_ENABLE_ENGINE
#include <pango/pangoft2.h>
#include "text-types.h"
#include "gimptext-bitmap.h"
/* for compatibility with older freetype versions */
#ifndef FT_LOAD_TARGET_MONO
#define FT_LOAD_TARGET_MONO FT_LOAD_MONOCHROME
#endif
void
gimp_text_render_bitmap (PangoFont *font,
PangoGlyph glyph,
FT_Int32 flags,
FT_Matrix *trafo,
gint x,
gint y,
FT_Bitmap *bitmap)
{
FT_Face face;
gint y_start, y_limit, x_start, x_limit;
gint ix, iy;
const guchar *src;
guchar *dest;
face = pango_fc_font_lock_face (PANGO_FC_FONT (font));
FT_Set_Transform (face, trafo, NULL);
FT_Load_Glyph (face, (FT_UInt) glyph, flags);
FT_Render_Glyph (face->glyph,
(flags & FT_LOAD_TARGET_MONO ?
ft_render_mode_mono : ft_render_mode_normal));
x = PANGO_PIXELS (x);
y = PANGO_PIXELS (y);
x_start = MAX (0, - (x + face->glyph->bitmap_left));
x_limit = MIN (face->glyph->bitmap.width,
bitmap->width - (x + face->glyph->bitmap_left));
y_start = MAX (0, - (y - face->glyph->bitmap_top));
y_limit = MIN (face->glyph->bitmap.rows,
bitmap->rows - (y - face->glyph->bitmap_top));
src = face->glyph->bitmap.buffer + y_start * face->glyph->bitmap.pitch;
dest = bitmap->buffer +
(y_start + y - face->glyph->bitmap_top) * bitmap->pitch +
x_start + x + face->glyph->bitmap_left;
switch (face->glyph->bitmap.pixel_mode)
{
case ft_pixel_mode_grays:
src += x_start;
for (iy = y_start; iy < y_limit; iy++)
{
const guchar *s = src;
guchar *d = dest;
for (ix = x_start; ix < x_limit; ix++)
{
switch (*s)
{
case 0:
break;
case 0xff:
*d = 0xff;
default:
*d = MIN ((gushort) *d + (const gushort) *s, 0xff);
break;
}
s++;
d++;
}
dest += bitmap->pitch;
src += face->glyph->bitmap.pitch;
}
break;
case ft_pixel_mode_mono:
src += x_start / 8;
for (iy = y_start; iy < y_limit; iy++)
{
const guchar *s = src;
guchar *d = dest;
for (ix = x_start; ix < x_limit; ix++)
{
if ((*s) & (1 << (7 - (ix % 8))))
*d |= 0xff;
if ((ix % 8) == 7)
s++;
d++;
}
dest += bitmap->pitch;
src += face->glyph->bitmap.pitch;
}
break;
default:
break;
}
pango_fc_font_unlock_face (PANGO_FC_FONT (font));
}
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