openscad/src/colormap.cc

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#include "colormap.h"
#include "boosty.h"
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#include "printutils.h"
#include "PlatformUtils.h"
#include <boost/property_tree/json_parser.hpp>
static const char *DEFAULT_COLOR_SCHEME_NAME = "Cornfield";
// See http://lolengine.net/blog/2013/01/13/fast-rgb-to-hsv
static void rgbtohsv(float r, float g, float b, float &h, float &s, float &v)
{
float K = 0.f;
if (g < b)
{
std::swap(g, b);
K = -1.f;
}
if (r < g)
{
std::swap(r, g);
K = -2.f / 6.f - K;
}
float chroma = r - std::min(g, b);
h = fabs(K + (g - b) / (6.f * chroma + 1e-20f));
s = chroma / (r + 1e-20f);
v = r;
}
RenderColorScheme::RenderColorScheme() : _path("")
{
_name = DEFAULT_COLOR_SCHEME_NAME;
_index = 1000;
_show_in_gui = true;
_color_scheme.insert(ColorScheme::value_type(BACKGROUND_COLOR, Color4f(0xff, 0xff, 0xe5)));
_color_scheme.insert(ColorScheme::value_type(AXES_COLOR, Color4f(0x00, 0x00, 0x00)));
_color_scheme.insert(ColorScheme::value_type(OPENCSG_FACE_FRONT_COLOR, Color4f(0xf9, 0xd7, 0x2c)));
_color_scheme.insert(ColorScheme::value_type(OPENCSG_FACE_BACK_COLOR, Color4f(0x9d, 0xcb, 0x51)));
_color_scheme.insert(ColorScheme::value_type(CGAL_FACE_FRONT_COLOR, Color4f(0xf9, 0xd7, 0x2c)));
_color_scheme.insert(ColorScheme::value_type(CGAL_FACE_2D_COLOR, Color4f(0x00, 0xbf, 0x99)));
_color_scheme.insert(ColorScheme::value_type(CGAL_FACE_BACK_COLOR, Color4f(0x9d, 0xcb, 0x51)));
_color_scheme.insert(ColorScheme::value_type(CGAL_EDGE_FRONT_COLOR, Color4f(0xff, 0xec, 0x5e)));
_color_scheme.insert(ColorScheme::value_type(CGAL_EDGE_BACK_COLOR, Color4f(0xab, 0xd8, 0x56)));
_color_scheme.insert(ColorScheme::value_type(CGAL_EDGE_2D_COLOR, Color4f(0xff, 0x00, 0x00)));
_color_scheme.insert(ColorScheme::value_type(CROSSHAIR_COLOR, Color4f(0x80, 0x00, 0x00)));
}
RenderColorScheme::RenderColorScheme(fs::path path) : _path(path)
{
try {
boost::property_tree::read_json(boosty::stringy(path).c_str(), pt);
_name = pt.get<std::string>("name");
_index = pt.get<int>("index");
_show_in_gui = pt.get<bool>("show-in-gui");
addColor(BACKGROUND_COLOR, "background");
addColor(AXES_COLOR, "axes-color");
addColor(OPENCSG_FACE_FRONT_COLOR, "opencsg-face-front");
addColor(OPENCSG_FACE_BACK_COLOR, "opencsg-face-back");
addColor(CGAL_FACE_FRONT_COLOR, "cgal-face-front");
addColor(CGAL_FACE_2D_COLOR, "cgal-face-2d");
addColor(CGAL_FACE_BACK_COLOR, "cgal-face-back");
addColor(CGAL_EDGE_FRONT_COLOR, "cgal-edge-front");
addColor(CGAL_EDGE_BACK_COLOR, "cgal-edge-back");
addColor(CGAL_EDGE_2D_COLOR, "cgal-edge-2d");
addColor(CROSSHAIR_COLOR, "crosshair");
} catch (const std::exception & e) {
PRINTB("Error reading color scheme file '%s': %s", boosty::stringy(path).c_str() % e.what());
_error = e.what();
_name = "";
_index = 0;
_show_in_gui = false;
}
}
RenderColorScheme::~RenderColorScheme()
{
}
bool RenderColorScheme::valid() const
{
return !_name.empty();
}
const std::string & RenderColorScheme::name() const
{
return _name;
}
int RenderColorScheme::index() const
{
return _index;
}
bool RenderColorScheme::showInGui() const
{
return _show_in_gui;
}
std::string RenderColorScheme::path() const
{
return _path.string();
}
std::string RenderColorScheme::error() const
{
return _error;
}
ColorScheme & RenderColorScheme::colorScheme()
{
return _color_scheme;
}
const boost::property_tree::ptree & RenderColorScheme::propertyTree() const
{
return pt;
}
void RenderColorScheme::addColor(RenderColor colorKey, std::string key)
{
const boost::property_tree::ptree& colors = pt.get_child("colors");
std::string color = colors.get<std::string>(key);
if ((color.length() == 7) && (color.at(0) == '#')) {
char *endptr;
unsigned int val = strtol(color.substr(1).c_str(), &endptr, 16);
int r = (val >> 16) & 0xff;
int g = (val >> 8) & 0xff;
int b = val & 0xff;
_color_scheme.insert(ColorScheme::value_type(colorKey, Color4f(r, g, b)));
} else {
throw std::invalid_argument(std::string("invalid color value for key '") + key + "': '" + color + "'");
}
}
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ColorMap *ColorMap::inst(bool erase)
{
static ColorMap *instance = new ColorMap;
if (erase) {
delete instance;
instance = NULL;
}
return instance;
}
ColorMap::ColorMap()
{
colorSchemeSet = enumerateColorSchemes();
dump();
}
ColorMap::~ColorMap()
{
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}
const char * ColorMap::defaultColorSchemeName() const
{
return DEFAULT_COLOR_SCHEME_NAME;
}
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const ColorScheme &ColorMap::defaultColorScheme() const
{
return *findColorScheme(DEFAULT_COLOR_SCHEME_NAME);
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}
const ColorScheme *ColorMap::findColorScheme(const std::string &name) const
{
for (colorscheme_set_t::const_iterator it = colorSchemeSet.begin();it != colorSchemeSet.end();it++) {
RenderColorScheme *scheme = (*it).second.get();
if (name == scheme->name()) {
return &scheme->colorScheme();
}
}
return NULL;
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}
void ColorMap::dump() const
{
PRINTD("Listing available color schemes...");
std::list<std::string> names = colorSchemeNames();
unsigned int length = 0;
for (std::list<std::string>::const_iterator it = names.begin();it != names.end();it++) {
length = (*it).length() > length ? (*it).length() : length;
}
for (colorscheme_set_t::const_iterator it = colorSchemeSet.begin();it != colorSchemeSet.end();it++) {
const RenderColorScheme *cs = (*it).second.get();
const char gui = cs->showInGui() ? 'G' : '-';
if (cs->path().empty()) {
PRINTDB("%6d:%c: %s (built-in)", cs->index() % gui % boost::io::group(std::setw(length), cs->name()));
} else {
PRINTDB("%6d:%c: %s from %s", cs->index() % gui % boost::io::group(std::setw(length), cs->name()) % cs->path());
}
}
PRINTD("done.");
}
std::list<std::string> ColorMap::colorSchemeNames(bool guiOnly) const
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{
std::list<std::string> colorSchemeNames;
for (colorscheme_set_t::const_iterator it = colorSchemeSet.begin();it != colorSchemeSet.end();it++) {
const RenderColorScheme *scheme = (*it).second.get();
if (guiOnly && !scheme->showInGui()) {
continue;
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}
colorSchemeNames.push_back(scheme->name());
}
return colorSchemeNames;
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}
Color4f ColorMap::getColor(const ColorScheme &cs, const RenderColor rc)
{
if (cs.count(rc)) return cs.at(rc);
if (ColorMap::inst()->defaultColorScheme().count(rc)) return ColorMap::inst()->defaultColorScheme().at(rc);
return Color4f(0, 0, 0, 127);
}
Color4f ColorMap::getColorHSV(const Color4f &col)
{
float h, s, v;
rgbtohsv(col[0], col[1], col[2], h, s, v);
return Color4f(h, s, v, col[3]);
}
/**
* Calculate contrast color. Based on the article
* http://gamedev.stackexchange.com/questions/38536/given-a-rgb-color-x-how-to-find-the-most-contrasting-color-y
*
* @param col the input color
* @return a color with high contrast to the input color
*/
Color4f ColorMap::getContrastColor(const Color4f &col)
{
Color4f hsv = ColorMap::getColorHSV(col);
float Y = 0.2126 * col[0] + 0.7152 * col[1] + 0.0722 * col[2];
float S = hsv[1];
if (S < 0.5) {
// low saturation, choose between black / white based on luminance Y
float val = Y > 0.5 ? 0.0f : 1.0f;
return Color4f(val, val, val, 1.0f);
} else {
float H = 360 * hsv[0];
if ((H < 60) || (H > 300)) {
return Color4f(0.0f, 1.0f, 1.0f, 1.0f); // red -> cyan
} else if (H < 180) {
return Color4f(1.0f, 0.0f, 1.0f, 1.0f); // green -> magenta
} else {
return Color4f(1.0f, 1.0f, 0.0f, 1.0f); // blue -> yellow
}
}
}
void ColorMap::enumerateColorSchemesInPath(colorscheme_set_t &result_set, const fs::path basePath)
{
const fs::path color_schemes = basePath / "color-schemes" / "render";
PRINTDB("Enumerating color schemes from '%s'", boosty::stringy(color_schemes).c_str());
fs::directory_iterator end_iter;
if (fs::exists(color_schemes) && fs::is_directory(color_schemes)) {
for (fs::directory_iterator dir_iter(color_schemes); dir_iter != end_iter; ++dir_iter) {
if (!fs::is_regular_file(dir_iter->status())) {
continue;
}
const fs::path path = (*dir_iter).path();
if (!(path.extension() == ".json")) {
continue;
}
RenderColorScheme *colorScheme = new RenderColorScheme(path);
if (colorScheme->valid() && (findColorScheme(colorScheme->name()) == 0)) {
result_set.insert(colorscheme_set_t::value_type(colorScheme->index(), boost::shared_ptr<RenderColorScheme>(colorScheme)));
PRINTDB("Found file '%s' with color scheme '%s' and index %d",
colorScheme->path() % colorScheme->name() % colorScheme->index());
} else {
PRINTDB("Invalid file '%s': %s", colorScheme->path() % colorScheme->error());
delete colorScheme;
}
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}
}
}
ColorMap::colorscheme_set_t ColorMap::enumerateColorSchemes()
{
colorscheme_set_t result_set;
RenderColorScheme *defaultColorScheme = new RenderColorScheme();
result_set.insert(colorscheme_set_t::value_type(defaultColorScheme->index(),
boost::shared_ptr<RenderColorScheme>(defaultColorScheme)));
enumerateColorSchemesInPath(result_set, PlatformUtils::resourceBasePath());
enumerateColorSchemesInPath(result_set, PlatformUtils::userConfigPath());
return result_set;
}