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/*
* Helper functions to use cairo with inkscape
*
* Copyright (C) 2007 bulia byak
* Copyright (C) 2008 Johan Engelen
*
* Released under GNU GPL
*
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdexcept>
#include <cairo.h>
#include <2geom/matrix.h>
#include "display/cairo-utils.h"
#include "display/inkscape-cairo.h"
#include "color.h"
namespace Inkscape {
CairoGroup::CairoGroup(cairo_t *_ct) : ct(_ct), pushed(false) {}
CairoGroup::~CairoGroup() {
if (pushed) {
cairo_pattern_t *p = cairo_pop_group(ct);
cairo_pattern_destroy(p);
}
}
void CairoGroup::push() {
cairo_push_group(ct);
pushed = true;
}
void CairoGroup::push_with_content(cairo_content_t content) {
cairo_push_group_with_content(ct, content);
pushed = true;
}
cairo_pattern_t *CairoGroup::pop() {
if (pushed) {
cairo_pattern_t *ret = cairo_pop_group(ct);
pushed = false;
return ret;
} else {
throw std::logic_error("Cairo group popped without pushing it first");
}
}
Cairo::RefPtr<Cairo::Pattern> CairoGroup::popmm() {
if (pushed) {
cairo_pattern_t *ret = cairo_pop_group(ct);
Cairo::RefPtr<Cairo::Pattern> retmm(new Cairo::Pattern(ret, true));
pushed = false;
return retmm;
} else {
throw std::logic_error("Cairo group popped without pushing it first");
}
}
void CairoGroup::pop_to_source() {
if (pushed) {
cairo_pop_group_to_source(ct);
pushed = false;
}
}
CairoContext::CairoContext(cairo_t *obj, bool ref)
: Cairo::Context(obj, ref)
{}
void CairoContext::transform(Geom::Matrix const &m)
{
cairo_matrix_t cm;
cm.xx = m[0];
cm.xy = m[2];
cm.x0 = m[4];
cm.yx = m[1];
cm.yy = m[3];
cm.y0 = m[5];
cairo_transform(cobj(), &cm);
}
void CairoContext::set_source_rgba32(guint32 color)
{
double red = SP_RGBA32_R_F(color);
double gre = SP_RGBA32_G_F(color);
double blu = SP_RGBA32_B_F(color);
double alp = SP_RGBA32_A_F(color);
cairo_set_source_rgba(cobj(), red, gre, blu, alp);
}
void CairoContext::append_path(Geom::PathVector const &pv)
{
feed_pathvector_to_cairo(cobj(), pv);
}
Cairo::RefPtr<CairoContext> CairoContext::create(Cairo::RefPtr<Cairo::Surface> const &target)
{
cairo_t *ct = cairo_create(target->cobj());
Cairo::RefPtr<CairoContext> ret(new CairoContext(ct, true));
return ret;
}
} // namespace Inkscape
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
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