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 Corrêa 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 :