source: trunk/third/librsvg/rsvg-paint-server.h @ 18805

/* vim: set sw=4: -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/*
   rsvg-paint-server.h : RSVG colors

   Copyright (C) 2000 Eazel, Inc.
   Copyright (C) 2002 Dom Lachowicz <cinamod@hotmail.com>

   This program 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 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library 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.

   Author: Raph Levien <raph@artofcode.com>
*/

#ifndef RSVG_PAINT_SERVER_H
#define RSVG_PAINT_SERVER_H

#include <glib/gtypes.h>
#include <libart_lgpl/art_render_gradient.h>
#include "rsvg-defs.h"

G_BEGIN_DECLS

typedef struct _RsvgGradientStop RsvgGradientStop;
typedef struct _RsvgGradientStops RsvgGradientStops;
typedef struct _RsvgLinearGradient RsvgLinearGradient;
typedef struct _RsvgRadialGradient RsvgRadialGradient;

typedef struct _RsvgPaintServer RsvgPaintServer;

typedef struct _RsvgPSCtx RsvgPSCtx;

struct _RsvgPSCtx {
        int dummy;
        /* todo: we need to take in some context information, including:
           
        1. The global affine transformation.
        
        2. User coordinates at time of reference (to implement
        gradientUnits = "userSpaceOnUse").
        
        3. Object bounding box (to implement gradientUnits =
        "objectBoundingBox").
        
        Maybe signal for lazy evaluation of object bbox.
        */
};

struct _RsvgGradientStop {
        double offset;
        guint32 rgba;
};

struct _RsvgGradientStops {
        int n_stop;
        RsvgGradientStop *stop;
};

struct _RsvgLinearGradient {
        RsvgDefVal super;
        gboolean obj_bbox;
        double affine[6]; /* user space to actual at time of gradient def */
        RsvgGradientStops *stops;
        ArtGradientSpread spread;
        double x1, y1;
        double x2, y2;
};

struct _RsvgRadialGradient {
        RsvgDefVal super;
        gboolean obj_bbox;
        double affine[6]; /* user space to actual at time of gradient def */
        RsvgGradientStops *stops;
        ArtGradientSpread spread;
        double cx, cy;
        double r;
        double fx, fy;
};

/* Create a new paint server based on a specification string. */
RsvgPaintServer *
rsvg_paint_server_parse (const RsvgDefs *defs, const char *str);

void
rsvg_render_paint_server (ArtRender *ar, RsvgPaintServer *ps,
                                                  const RsvgPSCtx *ctx);

void
rsvg_paint_server_ref (RsvgPaintServer *ps);

void
rsvg_paint_server_unref (RsvgPaintServer *ps);

RsvgRadialGradient *
rsvg_clone_radial_gradient (const RsvgRadialGradient *grad, gboolean * shallow_cloned);

RsvgLinearGradient *
rsvg_clone_linear_gradient (const RsvgLinearGradient *grad, gboolean * shallow_cloned);

G_END_DECLS

#endif