static jobject colorFromNative(JNIEnv *env, mapnik::color const& c) {
jobject ret=env->AllocObject(CLASS_COLOR);
env->SetIntField(ret, FIELD_COLOR_RED, c.red());
env->SetIntField(ret, FIELD_COLOR_GREEN, c.green());
env->SetIntField(ret, FIELD_COLOR_BLUE, c.blue());
env->SetIntField(ret, FIELD_COLOR_ALPHA, c.alpha());
return ret;
}
void agg_renderer<T0,T1>::draw_geo_extent(box2d<double> const& extent, mapnik::color const& color)
{
box2d<double> box = common_.t_.forward(extent);
double x0 = box.minx();
double x1 = box.maxx();
double y0 = box.miny();
double y1 = box.maxy();
unsigned rgba = color.rgba();
for (double x=x0; x<x1; x++)
{
pixmap_.setPixel(x, y0, rgba);
pixmap_.setPixel(x, y1, rgba);
}
for (double y=y0; y<y1; y++)
{
pixmap_.setPixel(x0, y, rgba);
pixmap_.setPixel(x1, y, rgba);
}
}
CHECK( conv(1.0) == 3 );
CHECK( conv(60.0) == 153 );
// should not overflow on invalid input
CHECK( conv(100000.0) == 255 );
CHECK( conv(-100000.0) == 0 );
mapnik::alpha_conv_impl conv2;
CHECK( conv2(0.5) == 128 );
CHECK( conv2(1.0) == 255 );
// should not overflow on invalid input
CHECK( conv2(60.0) == 255 );
CHECK( conv2(100000.0) == 255 );
CHECK( conv2(-100000.0) == 0 );
mapnik::hsl_conv_impl conv3;
mapnik::color c;
conv3(c, 1.0, 1.0, 1.0);
CHECK( c.alpha() == 255 );
CHECK( c.red() == 3 );
CHECK( c.green() == 3 );
CHECK( c.blue() == 3 );
// invalid
conv3(c, -1, -1, -1);
CHECK( c.alpha() == 255 ); // should not be touched by hsl converter
CHECK( c.red() == 0 );
CHECK( c.green() == 0 );
CHECK( c.blue() == 0 );
}
SECTION("hex colors")
{
void set_pixel(mapnik::image_32 & im, unsigned x, unsigned y, mapnik::color const& c)
{
im.setPixel(x, y, c.rgba());
}
#include "catch.hpp"
// mapnik
#include <mapnik/image.hpp>
#include <mapnik/color.hpp>
#include <mapnik/image_view_any.hpp>
#include <mapnik/image_util.hpp>
TEST_CASE("image view") {
SECTION("test rgba8") {
mapnik::image_rgba8 im(4,4);
mapnik::color c_red("red");
mapnik::color c_blue("blue");
mapnik::color c_green("green");
mapnik::color c_yellow("yellow");
mapnik::fill(im, c_red);
// Upper Left 2x2 is blue
mapnik::set_pixel(im, 0, 0, c_blue);
mapnik::set_pixel(im, 0, 1, c_blue);
mapnik::set_pixel(im, 1, 0, c_blue);
mapnik::set_pixel(im, 1, 1, c_blue);
// Upper Right 2x2 is green
mapnik::set_pixel(im, 2, 0, c_green);
mapnik::set_pixel(im, 2, 1, c_green);
mapnik::set_pixel(im, 3, 0, c_green);
mapnik::set_pixel(im, 3, 1, c_green);
// Lower Left 2x2 is yellow
mapnik::set_pixel(im, 0, 2, c_yellow);
mapnik::image_any im2_any(mapnik::image_rgba8(4,4,true,true));
// Fill the images with meaningfull values
mapnik::color c1(57,70,128,128); // This color is not premultiplied
mapnik::color c2(57,70,128,128, true); // This color is premultiplied
mapnik::fill(im, c1); // Because c1 is not premultiplied it will make the image not premultiplied
mapnik::fill(im_any, c1); // Because c1 is not premultiplied it will make the image not premultiplied
mapnik::fill(im2, c2); // Because c1 is premultiplied it will make the image premultiplied
mapnik::fill(im2_any, c2); // Because c1 is premultiplied it will make the image premultiplied
mapnik::apply_opacity(im, 0.75);
mapnik::apply_opacity(im_any, 0.75);
mapnik::apply_opacity(im2, 0.75);
mapnik::apply_opacity(im2_any, 0.75);
mapnik::color out;
// This should have only changed the alpha, as it was not premultipleid
out = mapnik::get_pixel<mapnik::color>(im, 0, 0);
CHECK(static_cast<int>(out.red()) == 57);
CHECK(static_cast<int>(out.green()) == 70);
CHECK(static_cast<int>(out.blue()) == 128);
CHECK(static_cast<int>(out.alpha()) == 96);
out = mapnik::get_pixel<mapnik::color>(im_any, 0, 0);
CHECK(static_cast<int>(out.red()) == 57);
CHECK(static_cast<int>(out.green()) == 70);
CHECK(static_cast<int>(out.blue()) == 128);
CHECK(static_cast<int>(out.alpha()) == 96);
// This will be different because it is demultiplied then premultiplied again after setting alpha
out = mapnik::get_pixel<mapnik::color>(im2, 0, 0);
CHECK(static_cast<int>(out.red()) == 43);
CHECK(static_cast<int>(out.green()) == 53);