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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:24:48 +0000 |
commit | cca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch) | |
tree | 146f39ded1c938019e1ed42d30923c2ac9e86789 /src/display/nr-filter-merge.cpp | |
parent | Initial commit. (diff) | |
download | inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.tar.xz inkscape-cca66b9ec4e494c1d919bff0f71a820d8afab1fa.zip |
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/display/nr-filter-merge.cpp')
-rw-r--r-- | src/display/nr-filter-merge.cpp | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/display/nr-filter-merge.cpp b/src/display/nr-filter-merge.cpp new file mode 100644 index 0000000..9ebfe40 --- /dev/null +++ b/src/display/nr-filter-merge.cpp @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * feMerge filter effect renderer + * + * Authors: + * Niko Kiirala <niko@kiirala.com> + * + * Copyright (C) 2007 authors + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <vector> +#include "display/cairo-utils.h" +#include "display/nr-filter-merge.h" +#include "display/nr-filter-slot.h" +#include "display/nr-filter-utils.h" + +namespace Inkscape { +namespace Filters { + +FilterMerge::FilterMerge() : + _input_image(1, NR_FILTER_SLOT_NOT_SET) +{} + +FilterPrimitive * FilterMerge::create() { + return new FilterMerge(); +} + +FilterMerge::~FilterMerge() += default; + +void FilterMerge::render_cairo(FilterSlot &slot) +{ + if (_input_image.empty()) return; + + SPColorInterpolation ci_fp = SP_CSS_COLOR_INTERPOLATION_AUTO; + if( _style ) { + ci_fp = (SPColorInterpolation)_style->color_interpolation_filters.computed; + } + + Geom::Rect vp = filter_primitive_area( slot.get_units() ); + slot.set_primitive_area(_output, vp); // Needed for tiling + + // output is RGBA if at least one input is RGBA + bool rgba32 = false; + cairo_surface_t *out = nullptr; + for (int & i : _input_image) { + cairo_surface_t *in = slot.getcairo(i); + if (cairo_surface_get_content(in) == CAIRO_CONTENT_COLOR_ALPHA) { + out = ink_cairo_surface_create_identical(in); + set_cairo_surface_ci( out, ci_fp ); + rgba32 = true; + break; + } + } + + if (!rgba32) { + out = ink_cairo_surface_create_identical(slot.getcairo(_input_image[0])); + } + cairo_t *out_ct = cairo_create(out); + + for (int & i : _input_image) { + cairo_surface_t *in = slot.getcairo(i); + + set_cairo_surface_ci( in, ci_fp ); + cairo_set_source_surface(out_ct, in, 0, 0); + cairo_paint(out_ct); + } + + cairo_destroy(out_ct); + slot.set(_output, out); + cairo_surface_destroy(out); +} + +bool FilterMerge::can_handle_affine(Geom::Affine const &) +{ + // Merge is a per-pixel primitive and is immutable under transformations + return true; +} + +double FilterMerge::complexity(Geom::Affine const &) +{ + return 1.02; +} + +bool FilterMerge::uses_background() +{ + for (int input : _input_image) { + if (input == NR_FILTER_BACKGROUNDIMAGE || input == NR_FILTER_BACKGROUNDALPHA) { + return true; + } + } + return false; +} + +void FilterMerge::set_input(int slot) { + _input_image[0] = slot; +} + +void FilterMerge::set_input(int input, int slot) { + if (input < 0) return; + + if (static_cast<int>(_input_image.size()) > input) { + _input_image[input] = slot; + } else { + for (int i = static_cast<int>(_input_image.size()) ; i < input ; i++) { + _input_image.push_back(NR_FILTER_SLOT_NOT_SET); + } + _input_image.push_back(slot); + } +} + +} /* 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 : |