mirror of https://github.com/GNOME/gimp.git
269 lines
6.9 KiB
C
269 lines
6.9 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* GimpText
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* Copyright (C) 2003 Sven Neumann <sven@gimp.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <glib-object.h>
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#include <pango/pangoft2.h>
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#include <freetype/ftglyph.h>
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#include <freetype/ftoutln.h>
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#include "text/text-types.h"
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#include "core/gimpimage.h"
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#include "vectors/gimpbezierstroke.h"
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#include "vectors/gimpvectors.h"
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#include "gimptext.h"
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#include "gimptext-private.h"
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#include "gimptext-vectors.h"
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#include "gimptextlayout.h"
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#include "gimptextlayout-render.h"
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typedef struct _RenderContext RenderContext;
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struct _RenderContext
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{
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GimpVectors *vectors;
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GimpStroke *stroke;
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GimpAnchor *anchor;
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gint offset_x;
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gint offset_y;
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};
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static void gimp_text_render_vectors (PangoFont *font,
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PangoGlyph *glyph,
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gint flags,
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gint x,
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gint y,
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RenderContext *context);
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GimpVectors *
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gimp_text_vectors_new (GimpImage *image,
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GimpText *text)
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{
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GimpVectors *vectors;
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GimpTextLayout *layout;
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RenderContext context = { 0, };
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g_return_val_if_fail (GIMP_IS_IMAGE (image), NULL);
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g_return_val_if_fail (GIMP_IS_TEXT (text), NULL);
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vectors = gimp_vectors_new (image, NULL);
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if (text->text)
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{
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gimp_object_set_name_safe (GIMP_OBJECT (vectors), text->text);
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layout = gimp_text_layout_new (text, image);
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context.vectors = vectors;
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gimp_text_layout_render (layout,
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(GimpTextRenderFunc) gimp_text_render_vectors,
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&context);
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g_object_unref (layout);
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}
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return vectors;
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}
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static void
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gimp_text_vector_coords (RenderContext *context,
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const FT_Vector *vector,
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GimpCoords *coords)
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{
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coords->x = context->offset_x + (gdouble) vector->x / 64.0;
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coords->y = context->offset_y - (gdouble) vector->y / 64.0;
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coords->pressure = 1.0;
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coords->xtilt = 0.5;
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coords->ytilt = 0.5;
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coords->wheel = 0.5;
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}
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static gint
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moveto (FT_Vector *to,
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gpointer data)
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{
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RenderContext *context = (RenderContext *) data;
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GimpCoords coords;
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g_printerr ("moveto %f, %f\n", to->x / 64.0, to->y / 64.0);
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gimp_text_vector_coords (context, to, &coords);
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context->stroke = gimp_bezier_stroke_new ();
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gimp_vectors_stroke_add (context->vectors, context->stroke);
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g_object_unref (context->stroke);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, NULL, EXTEND_SIMPLE);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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return 0;
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}
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static gint
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lineto (FT_Vector *to,
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gpointer data)
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{
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RenderContext *context = (RenderContext *) data;
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GimpCoords coords;
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g_printerr ("lineto %f, %f\n", to->x / 64.0, to->y / 64.0);
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if (! context->stroke)
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return 0;
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gimp_text_vector_coords (context, to, &coords);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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return 0;
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}
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static gint
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conicto (FT_Vector *control,
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FT_Vector *to,
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gpointer data)
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{
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RenderContext *context = (RenderContext *) data;
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GimpCoords coords;
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g_printerr ("conicto %f, %f\n", to->x / 64.0, to->y / 64.0);
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if (! context->stroke)
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return 0;
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gimp_text_vector_coords (context, control, &coords);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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gimp_text_vector_coords (context, to, &coords);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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return 0;
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}
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static gint
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cubicto (FT_Vector *control1,
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FT_Vector *control2,
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FT_Vector *to,
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gpointer data)
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{
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RenderContext *context = (RenderContext *) data;
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GimpCoords coords;
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g_printerr ("cubicto %f, %f\n", to->x / 64.0, to->y / 64.0);
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if (! context->stroke)
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return 0;
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gimp_text_vector_coords (context, control1, &coords);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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gimp_text_vector_coords (context, to, &coords);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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gimp_text_vector_coords (context, control2, &coords);
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context->anchor =
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gimp_bezier_stroke_extend (GIMP_BEZIER_STROKE (context->stroke),
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&coords, context->anchor, EXTEND_SIMPLE);
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return 0;
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}
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static void
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gimp_text_render_vectors (PangoFont *font,
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PangoGlyph *pango_glyph,
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gint flags,
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gint x,
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gint y,
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RenderContext *context)
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{
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const FT_Outline_Funcs outline_funcs =
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{
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moveto,
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lineto,
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conicto,
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cubicto,
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0,
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0
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};
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FT_Face face;
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FT_Glyph glyph;
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face = pango_ft2_font_get_face (font);
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FT_Load_Glyph (face, (FT_UInt) pango_glyph, flags);
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FT_Get_Glyph (face->glyph, &glyph);
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if (face->glyph->format == FT_GLYPH_FORMAT_OUTLINE)
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{
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FT_OutlineGlyph outline_glyph = (FT_OutlineGlyph) glyph;
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context->offset_x = x;
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context->offset_y = y;
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FT_Outline_Decompose (&outline_glyph->outline, &outline_funcs, context);
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}
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FT_Done_Glyph (glyph);
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}
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