From cca66b9ec4e494c1d919bff0f71a820d8afab1fa Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:24:48 +0200 Subject: Adding upstream version 1.2.2. Signed-off-by: Daniel Baumann --- src/display/nr-filter-diffuselighting.cpp | 236 ++++++++++++++++++++++++++++++ 1 file changed, 236 insertions(+) create mode 100644 src/display/nr-filter-diffuselighting.cpp (limited to 'src/display/nr-filter-diffuselighting.cpp') diff --git a/src/display/nr-filter-diffuselighting.cpp b/src/display/nr-filter-diffuselighting.cpp new file mode 100644 index 0000000..4ff758f --- /dev/null +++ b/src/display/nr-filter-diffuselighting.cpp @@ -0,0 +1,236 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * feDiffuseLighting renderer + * + * Authors: + * Niko Kiirala + * Jean-Rene Reinhard + * Krzysztof Kosiński + * + * Copyright (C) 2007-2010 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 + +#include "display/cairo-templates.h" +#include "display/cairo-utils.h" +#include "display/nr-3dutils.h" +#include "display/nr-filter-diffuselighting.h" +#include "display/nr-filter-slot.h" +#include "display/nr-filter-units.h" +#include "display/nr-filter-utils.h" +#include "display/nr-light.h" +#include "svg/svg-icc-color.h" +#include "svg/svg-color.h" + +namespace Inkscape { +namespace Filters { + +FilterDiffuseLighting::FilterDiffuseLighting() +{ + light_type = NO_LIGHT; + diffuseConstant = 1; + surfaceScale = 1; + lighting_color = 0xffffffff; +} + +FilterPrimitive * FilterDiffuseLighting::create() { + return new FilterDiffuseLighting(); +} + +FilterDiffuseLighting::~FilterDiffuseLighting() += default; + +struct DiffuseLight : public SurfaceSynth { + DiffuseLight(cairo_surface_t *bumpmap, double scale, double kd) + : SurfaceSynth(bumpmap) + , _scale(scale) + , _kd(kd) + {} + +protected: + guint32 diffuseLighting(int x, int y, NR::Fvector const &light, NR::Fvector const &light_components) { + NR::Fvector normal = surfaceNormalAt(x, y, _scale); + double k = _kd * NR::scalar_product(normal, light); + + guint32 r = CLAMP_D_TO_U8(k * light_components[LIGHT_RED]); + guint32 g = CLAMP_D_TO_U8(k * light_components[LIGHT_GREEN]); + guint32 b = CLAMP_D_TO_U8(k * light_components[LIGHT_BLUE]); + + ASSEMBLE_ARGB32(pxout, 255,r,g,b) + return pxout; + } + double _scale, _kd; +}; + +struct DiffuseDistantLight : public DiffuseLight { + DiffuseDistantLight(cairo_surface_t *bumpmap, SPFeDistantLight *light, guint32 color, + double scale, double diffuse_constant) + : DiffuseLight(bumpmap, scale, diffuse_constant) + { + DistantLight dl(light, color); + dl.light_vector(_lightv); + dl.light_components(_light_components); + } + + guint32 operator()(int x, int y) { + return diffuseLighting(x, y, _lightv, _light_components); + } +private: + NR::Fvector _lightv, _light_components; +}; + +struct DiffusePointLight : public DiffuseLight { + DiffusePointLight(cairo_surface_t *bumpmap, SPFePointLight *light, guint32 color, + Geom::Affine const &trans, double scale, double diffuse_constant, + double x0, double y0, int device_scale) + : DiffuseLight(bumpmap, scale, diffuse_constant) + , _light(light, color, trans, device_scale) + , _x0(x0) + , _y0(y0) + { + _light.light_components(_light_components); + } + + guint32 operator()(int x, int y) { + NR::Fvector light; + _light.light_vector(light, _x0 + x, _y0 + y, _scale * alphaAt(x, y)/255.0); + return diffuseLighting(x, y, light, _light_components); + } +private: + PointLight _light; + NR::Fvector _light_components; + double _x0, _y0; +}; + +struct DiffuseSpotLight : public DiffuseLight { + DiffuseSpotLight(cairo_surface_t *bumpmap, SPFeSpotLight *light, guint32 color, + Geom::Affine const &trans, double scale, double diffuse_constant, + double x0, double y0, int device_scale) + : DiffuseLight(bumpmap, scale, diffuse_constant) + , _light(light, color, trans, device_scale) + , _x0(x0) + , _y0(y0) + {} + + guint32 operator()(int x, int y) { + NR::Fvector light, light_components; + _light.light_vector(light, _x0 + x, _y0 + y, _scale * alphaAt(x, y)/255.0); + _light.light_components(light_components, light); + return diffuseLighting(x, y, light, light_components); + } +private: + SpotLight _light; + double _x0, _y0; +}; + +void FilterDiffuseLighting::render_cairo(FilterSlot &slot) +{ + cairo_surface_t *input = slot.getcairo(_input); + cairo_surface_t *out = ink_cairo_surface_create_same_size(input, CAIRO_CONTENT_COLOR_ALPHA); + + double r = SP_RGBA32_R_F(lighting_color); + double g = SP_RGBA32_G_F(lighting_color); + double b = SP_RGBA32_B_F(lighting_color); + + 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); + } + + // Only alpha channel of input is used, no need to check input color_interpolation_filter value. + SPColorInterpolation ci_fp = SP_CSS_COLOR_INTERPOLATION_AUTO; + if( _style ) { + ci_fp = (SPColorInterpolation)_style->color_interpolation_filters.computed; + + // Lighting 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 ); + guint32 color = SP_RGBA32_F_COMPOSE( r, g, b, 1.0 ); + + int device_scale = slot.get_device_scale(); + + Geom::Rect slot_area = slot.get_slot_area(); + Geom::Point p = slot_area.min(); + + // trans has inverse y... so we can't just scale by device_scale! We must instead explicitly + // scale the point and spot light coordinates (as well as "scale"). + + Geom::Affine trans = slot.get_units().get_matrix_primitiveunits2pb(); + + double x0 = p[Geom::X], y0 = p[Geom::Y]; + double scale = surfaceScale * trans.descrim() * device_scale; + + switch (light_type) { + case DISTANT_LIGHT: + ink_cairo_surface_synthesize(out, + DiffuseDistantLight(input, light.distant, color, scale, diffuseConstant)); + break; + case POINT_LIGHT: + ink_cairo_surface_synthesize(out, + DiffusePointLight(input, light.point, color, trans, scale, diffuseConstant, x0, y0, device_scale)); + break; + case SPOT_LIGHT: + ink_cairo_surface_synthesize(out, + DiffuseSpotLight(input, light.spot, color, trans, scale, diffuseConstant, x0, y0, device_scale)); + break; + default: { + cairo_t *ct = cairo_create(out); + cairo_set_source_rgba(ct, 0,0,0,1); + cairo_set_operator(ct, CAIRO_OPERATOR_SOURCE); + cairo_paint(ct); + cairo_destroy(ct); + } break; + } + + slot.set(_output, out); + cairo_surface_destroy(out); +} + +void FilterDiffuseLighting::set_icc(SVGICCColor *icc_color) { + icc = icc_color; +} + +void FilterDiffuseLighting::area_enlarge(Geom::IntRect &area, Geom::Affine const & /*trans*/) +{ + // TODO: support kernelUnitLength + + // We expand the area by 1 in every direction to avoid artifacts on tile edges. + // However, it means that edge pixels will be incorrect. + area.expandBy(1); +} + +double FilterDiffuseLighting::complexity(Geom::Affine const &) +{ + return 9.0; +} + +} /* 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 : -- cgit v1.2.3