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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 sts=4 ts=4 expandtab: */
/*
rsvg-shapes.c: Draw shapes with cairo
Copyright (C) 2005 Dom Lachowicz <cinamod@hotmail.com>
Copyright (C) 2005 Caleb Moore <c.moore@student.unsw.edu.au>
Copyright (C) 2005 Red Hat, Inc.
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.
Authors: Dom Lachowicz <cinamod@hotmail.com>,
Caleb Moore <c.moore@student.unsw.edu.au>
Carl Worth <cworth@cworth.org>
*/
#include "rsvg-cairo-draw.h"
#include "rsvg-cairo-clip.h"
#include "rsvg-cairo-render.h"
#include "rsvg-styles.h"
#include "rsvg-path.h"
#include <math.h>
#include <string.h>
typedef struct RsvgCairoClipRender RsvgCairoClipRender;
struct RsvgCairoClipRender {
RsvgCairoRender super;
RsvgCairoRender *parent;
};
#define RSVG_CAIRO_CLIP_RENDER(render) (_RSVG_RENDER_CIC ((render), RSVG_RENDER_TYPE_CAIRO_CLIP, RsvgCairoClipRender))
static void
rsvg_cairo_clip_apply_affine (RsvgCairoClipRender *render, cairo_matrix_t *affine)
{
RsvgCairoRender *cairo_render = &render->super;
cairo_matrix_t matrix;
gboolean nest = cairo_render->cr != cairo_render->initial_cr;
cairo_matrix_init (&matrix,
affine->xx, affine->yx,
affine->xy, affine->yy,
affine->x0 + (nest ? 0 : render->parent->offset_x),
affine->y0 + (nest ? 0 : render->parent->offset_y));
cairo_set_matrix (cairo_render->cr, &matrix);
}
static void
rsvg_cairo_clip_render_path (RsvgDrawingCtx * ctx, const cairo_path_t *path)
{
RsvgCairoClipRender *render = RSVG_CAIRO_CLIP_RENDER (ctx->render);
RsvgCairoRender *cairo_render = &render->super;
RsvgState *state = rsvg_current_state (ctx);
cairo_t *cr;
cr = cairo_render->cr;
rsvg_cairo_clip_apply_affine (render, &state->affine);
cairo_set_fill_rule (cr, rsvg_current_state (ctx)->clip_rule);
cairo_append_path (cr, path);
}
static void
rsvg_cairo_clip_render_surface (RsvgDrawingCtx *ctx,
cairo_surface_t *surface,
double src_x,
double src_y,
double w,
double h)
{
}
static void
rsvg_cairo_clip_render_free (RsvgRender * self)
{
RsvgCairoClipRender *clip_render = RSVG_CAIRO_CLIP_RENDER (self);
g_free (clip_render);
}
static void
rsvg_cairo_clip_push_discrete_layer (RsvgDrawingCtx * ctx)
{
}
static void
rsvg_cairo_clip_pop_discrete_layer (RsvgDrawingCtx * ctx)
{
}
static void
rsvg_cairo_clip_add_clipping_rect (RsvgDrawingCtx * ctx, double x, double y, double w, double h)
{
}
static RsvgRender *
rsvg_cairo_clip_render_new (cairo_t * cr, RsvgCairoRender *parent)
{
RsvgCairoClipRender *clip_render = g_new0 (RsvgCairoClipRender, 1);
RsvgCairoRender *cairo_render = &clip_render->super;
RsvgRender *render = &cairo_render->super;
g_assert (parent->super.type == RSVG_RENDER_TYPE_CAIRO);
render->type = RSVG_RENDER_TYPE_CAIRO_CLIP;
render->free = rsvg_cairo_clip_render_free;
render->create_pango_context = rsvg_cairo_create_pango_context;
render->render_pango_layout = rsvg_cairo_render_pango_layout;
render->render_surface = rsvg_cairo_clip_render_surface;
render->render_path = rsvg_cairo_clip_render_path;
render->pop_discrete_layer = rsvg_cairo_clip_pop_discrete_layer;
render->push_discrete_layer = rsvg_cairo_clip_push_discrete_layer;
render->add_clipping_rect = rsvg_cairo_clip_add_clipping_rect;
render->get_surface_of_node = NULL;
cairo_render->initial_cr = parent->cr;
cairo_render->cr = cr;
clip_render->parent = parent;
return render;
}
void
rsvg_cairo_clip (RsvgDrawingCtx * ctx, RsvgClipPath * clip, RsvgBbox * bbox)
{
RsvgCairoRender *save = RSVG_CAIRO_RENDER (ctx->render);
cairo_matrix_t affinesave;
ctx->render = rsvg_cairo_clip_render_new (save->cr, save);
/* Horribly dirty hack to have the bbox premultiplied to everything */
if (clip->units == objectBoundingBox) {
cairo_matrix_t bbtransform;
cairo_matrix_init (&bbtransform,
bbox->rect.width,
0,
0,
bbox->rect.height,
bbox->rect.x,
bbox->rect.y);
affinesave = clip->super.state->affine;
cairo_matrix_multiply (&clip->super.state->affine, &bbtransform, &clip->super.state->affine);
}
rsvg_state_push (ctx);
_rsvg_node_draw_children ((RsvgNode *) clip, ctx, 0);
rsvg_state_pop (ctx);
if (clip->units == objectBoundingBox)
clip->super.state->affine = affinesave;
g_free (ctx->render);
cairo_clip (save->cr);
ctx->render = &save->super;
}
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