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svg renderer - render gradient with only one color-stop as solid color fill/stroke [WIP]

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This commit is contained in:
Artem Pavlenko 2021-05-04 15:10:29 +01:00
parent ffb6db7b4d
commit 7819ca7bd3
1 changed files with 61 additions and 6 deletions
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55
include/mapnik/svg/svg_renderer_agg.hpp
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@ -163,6 +163,7 @@ public:
unsigned g = stop_color.green();
unsigned b = stop_color.blue();
unsigned a = stop_color.alpha();
std::cerr << "stop offset:" << st.first << std::endl;
m_gradient_lut.add_color(st.first, agg::rgba8_pre(r, g, b, int(a * opacity)));
}
if (m_gradient_lut.build_lut())
@ -227,6 +228,8 @@ public:
interpolator_type,
gradient_adaptor_type,
color_func_type>;
std::cerr << x1 <<"," << y1 << "," << x2 << "," << y2 << std::endl;
// scale everything up since agg turns things into integers a bit too soon
int scaleup=255;
x1 *= scaleup;
@ -299,10 +302,27 @@ public:
}
if(attr.fill_gradient.get_gradient_type() != NO_GRADIENT)
{
std::size_t size = attr.fill_gradient.get_stop_array().size();
if (size == 1)
{
auto const& stop = attr.fill_gradient.get_stop_array()[0];
mapnik::color const& stop_color = stop.second;
unsigned r = stop_color.red();
unsigned g = stop_color.green();
unsigned b = stop_color.blue();
unsigned a = stop_color.alpha();
color = agg::rgba8_pre(r, g, b, a);
ScanlineRenderer ren_s(ren);
ren_s.color(color);
render_scanlines(ras, sl, ren_s);
}
else
{
render_gradient(ras, sl, ren, attr.fill_gradient, transform,
attr.fill_opacity * attr.opacity * opacity, symbol_bbox, curved_trans, attr.index);
}
}
else
{
ras.filling_rule(attr.even_odd_flag ? fill_even_odd : fill_non_zero);
@ -343,9 +363,27 @@ public:
ras.add_path(curved_dashed_stroked_trans, attr.index);
if (attr.stroke_gradient.get_gradient_type() != NO_GRADIENT)
{
std::size_t size = attr.stroke_gradient.get_stop_array().size();
if (size == 1)
{
auto const& stop = attr.stroke_gradient.get_stop_array()[0];
mapnik::color const& stop_color = stop.second;
unsigned r = stop_color.red();
unsigned g = stop_color.green();
unsigned b = stop_color.blue();
unsigned a = stop_color.alpha();
color = agg::rgba8_pre(r, g, b, a);
ScanlineRenderer ren_s(ren);
ren_s.color(color);
render_scanlines(ras, sl, ren_s);
}
else
{
render_gradient(ras, sl, ren, attr.stroke_gradient, transform,
attr.stroke_opacity * attr.opacity * opacity, symbol_bbox, curved_trans, attr.index);
}
}
else
{
ras.filling_rule(fill_non_zero);
@ -376,10 +414,27 @@ public:
ras.reset();
ras.add_path(curved_stroked_trans, attr.index);
if (attr.stroke_gradient.get_gradient_type() != NO_GRADIENT)
{
std::size_t size = attr.stroke_gradient.get_stop_array().size();
if (size == 1)
{
auto const& stop = attr.stroke_gradient.get_stop_array()[0];
mapnik::color const& stop_color = stop.second;
unsigned r = stop_color.red();
unsigned g = stop_color.green();
unsigned b = stop_color.blue();
unsigned a = stop_color.alpha();
color = agg::rgba8_pre(r, g, b, a);
ScanlineRenderer ren_s(ren);
ren_s.color(color);
render_scanlines(ras, sl, ren_s);
}
else
{
render_gradient(ras, sl, ren, attr.stroke_gradient, transform,
attr.stroke_opacity * attr.opacity * opacity, symbol_bbox, curved_trans, attr.index);
}
}
else
{
ras.filling_rule(fill_non_zero);