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Diffstat (limited to 'src/display/nr-filter-flood.cpp')
-rw-r--r-- | src/display/nr-filter-flood.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/display/nr-filter-flood.cpp b/src/display/nr-filter-flood.cpp new file mode 100644 index 0000000..2a0996d --- /dev/null +++ b/src/display/nr-filter-flood.cpp @@ -0,0 +1,140 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * feFlood filter primitive renderer + * + * Authors: + * Felipe CorrĂȘa da Silva Sanches <juca@members.fsf.org> + * Tavmjong Bah <tavmjong@free.fr> (use primitive filter region) + * + * Copyright (C) 2007, 2011 authors + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" // only include where actually required! +#endif + +#include "display/cairo-utils.h" +#include "display/nr-filter-flood.h" +#include "display/nr-filter-slot.h" +#include "svg/svg-icc-color.h" +#include "svg/svg-color.h" +#include "color.h" + +namespace Inkscape { +namespace Filters { + +FilterFlood::FilterFlood() += default; + +FilterPrimitive * FilterFlood::create() { + return new FilterFlood(); +} + +FilterFlood::~FilterFlood() += default; + +void FilterFlood::render_cairo(FilterSlot &slot) +{ + cairo_surface_t *input = slot.getcairo(_input); + + double r = SP_RGBA32_R_F(color); + double g = SP_RGBA32_G_F(color); + double b = SP_RGBA32_B_F(color); + double a = opacity; + + if (icc) { + guchar ru, gu, bu; + icc_color_to_sRGB(icc, &ru, &gu, &bu); + r = SP_COLOR_U_TO_F(ru); + g = SP_COLOR_U_TO_F(gu); + b = SP_COLOR_U_TO_F(bu); + } + + cairo_surface_t *out = ink_cairo_surface_create_same_size(input, CAIRO_CONTENT_COLOR_ALPHA); + + SPColorInterpolation ci_fp = SP_CSS_COLOR_INTERPOLATION_AUTO; + if( _style ) { + ci_fp = (SPColorInterpolation)_style->color_interpolation_filters.computed; + + // Flood color is always defined in terms of sRGB, preconvert to linearRGB + // if color_interpolation_filters set to linearRGB (for efficiency assuming + // next filter primitive has same value of cif). + if( ci_fp == SP_CSS_COLOR_INTERPOLATION_LINEARRGB ) { + r = srgb_to_linear( r ); + g = srgb_to_linear( g ); + b = srgb_to_linear( b ); + } + } + set_cairo_surface_ci(out, ci_fp ); + + // Get filter primitive area in user units + Geom::Rect fp = filter_primitive_area( slot.get_units() ); + + // Convert to Cairo units + Geom::Rect fp_cairo = fp * slot.get_units().get_matrix_user2pb(); + + // Get area in slot (tile to fill) + Geom::Rect sa = slot.get_slot_area(); + + // Get overlap + Geom::OptRect optoverlap = intersect( fp_cairo, sa ); + if( optoverlap ) { + + Geom::Rect overlap = *optoverlap; + + double dx = fp_cairo.min()[Geom::X] - sa.min()[Geom::X]; + double dy = fp_cairo.min()[Geom::Y] - sa.min()[Geom::Y]; + if( dx < 0.0 ) dx = 0.0; + if( dy < 0.0 ) dy = 0.0; + + cairo_t *ct = cairo_create(out); + cairo_set_source_rgba(ct, r, g, b, a); + cairo_set_operator(ct, CAIRO_OPERATOR_SOURCE); + cairo_rectangle(ct, dx, dy, overlap.width(), overlap.height() ); + cairo_fill(ct); + cairo_destroy(ct); + } + + slot.set(_output, out); + cairo_surface_destroy(out); +} + +bool FilterFlood::can_handle_affine(Geom::Affine const &) +{ + // flood is a per-pixel primitive and is immutable under transformations + return true; +} + +void FilterFlood::set_color(guint32 c) { + color = c; +} + +void FilterFlood::set_opacity(double o) { + opacity = o; +} + +void FilterFlood::set_icc(SVGICCColor *icc_color) { + icc = icc_color; +} +double FilterFlood::complexity(Geom::Affine const &) +{ + // flood is actually less expensive than normal rendering, + // but when flood is processed, the object has already been rendered + return 1.0; +} + +} /* namespace Filters */ +} /* 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:fileencoding=utf-8:textwidth=99 : |