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Color.cpp
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// Copyright (c) 2008-2019 OpenShot Studios, LLC
//
// SPDX-License-Identifier: LGPL-3.0-or-later
#include <cmath>
#include "Color.h"
#include "Exceptions.h"
using namespace openshot;
// Constructor which takes R,G,B,A
Color::Color(unsigned char Red, unsigned char Green, unsigned char Blue, unsigned char Alpha) :
red(static_cast<double>(Red)),
green(static_cast<double>(Green)),
blue(static_cast<double>(Blue)),
alpha(static_cast<double>(Alpha)) { }
// Constructor which takes 4 existing Keyframe curves
Color::Color(Keyframe Red, Keyframe Green, Keyframe Blue, Keyframe Alpha) :
red(Red), green(Green), blue(Blue), alpha(Alpha) { }
// Constructor which takes a QColor
Color::Color(QColor qcolor) :
red(qcolor.red()),
green(qcolor.green()),
blue(qcolor.blue()),
alpha(qcolor.alpha()) { }
// Constructor which takes a HEX color code
Color::Color(std::string color_hex)
: Color::Color(QString::fromStdString(color_hex)) {}
Color::Color(const char* color_hex)
: Color::Color(QString(color_hex)) {}
// Get the HEX value of a color at a specific frame
std::string Color::GetColorHex(int64_t frame_number) {
int r = red.GetInt(frame_number);
int g = green.GetInt(frame_number);
int b = blue.GetInt(frame_number);
int a = alpha.GetInt(frame_number);
return QColor( r,g,b,a ).name().toStdString();
}
// Get RGBA values for a specific frame as an integer vector
std::vector<int> Color::GetColorRGBA(int64_t frame_number) {
std::vector<int> rgba;
rgba.push_back(red.GetInt(frame_number));
rgba.push_back(green.GetInt(frame_number));
rgba.push_back(blue.GetInt(frame_number));
rgba.push_back(alpha.GetInt(frame_number));
return rgba;
}
// Get the distance between 2 RGB pairs (alpha is ignored)
long Color::GetDistance(long R1, long G1, long B1, long R2, long G2, long B2)
{
long rmean = ( R1 + R2 ) / 2;
long r = R1 - R2;
long g = G1 - G2;
long b = B1 - B2;
return sqrt((((512+rmean)*r*r)>>8) + 4*g*g + (((767-rmean)*b*b)>>8));
}
// Generate JSON string of this object
std::string Color::Json() const {
// Return formatted string
return JsonValue().toStyledString();
}
// Generate Json::Value for this object
Json::Value Color::JsonValue() const {
// Create root json object
Json::Value root;
root["red"] = red.JsonValue();
root["green"] = green.JsonValue();
root["blue"] = blue.JsonValue();
root["alpha"] = alpha.JsonValue();
// return JsonValue
return root;
}
// Load JSON string into this object
void Color::SetJson(const std::string value) {
// Parse JSON string into JSON objects
try
{
const Json::Value root = openshot::stringToJson(value);
// Set all values that match
SetJsonValue(root);
}
catch (const std::exception& e)
{
// Error parsing JSON (or missing keys)
throw InvalidJSON("JSON is invalid (missing keys or invalid data types)");
}
}
// Load Json::Value into this object
void Color::SetJsonValue(const Json::Value root) {
// Set data from Json (if key is found)
if (!root["red"].isNull())
red.SetJsonValue(root["red"]);
if (!root["green"].isNull())
green.SetJsonValue(root["green"]);
if (!root["blue"].isNull())
blue.SetJsonValue(root["blue"]);
if (!root["alpha"].isNull())
alpha.SetJsonValue(root["alpha"]);
}
Color.h
Header file for Color class.
Exceptions.h
Header file for all Exception classes.
openshot::Color
This class represents a color (used on the timeline and clips)
Definition Color.h:27
openshot::Color::Json
std::string Json() const
Generate JSON string of this object.
Definition Color.cpp:79
openshot::Color::GetColorHex
std::string GetColorHex(int64_t frame_number)
Get the HEX value of a color at a specific frame.
Definition Color.cpp:47
openshot::Color::blue
openshot::Keyframe blue
Curve representing the red value (0 - 255)
Definition Color.h:32
openshot::Color::red
openshot::Keyframe red
Curve representing the red value (0 - 255)
Definition Color.h:30
openshot::Color::green
openshot::Keyframe green
Curve representing the green value (0 - 255)
Definition Color.h:31
openshot::Color::Color
Color()
Default constructor.
Definition Color.h:36
openshot::Color::SetJsonValue
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
Definition Color.cpp:117
openshot::Color::alpha
openshot::Keyframe alpha
Curve representing the alpha value (0 - 255)
Definition Color.h:33
openshot::Color::GetDistance
static long GetDistance(long R1, long G1, long B1, long R2, long G2, long B2)
Get the distance between 2 RGB pairs. (0=identical colors, 10=very close colors, 760=very different c...
Definition Color.cpp:69
openshot::Color::GetColorRGBA
std::vector< int > GetColorRGBA(int64_t frame_number)
Definition Color.cpp:58
openshot::Color::SetJson
void SetJson(const std::string value)
Load JSON string into this object.
Definition Color.cpp:100
openshot::Color::JsonValue
Json::Value JsonValue() const
Generate Json::Value for this object.
Definition Color.cpp:86
openshot::InvalidJSON
Exception for invalid JSON.
Definition Exceptions.h:218
openshot::Keyframe
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Definition KeyFrame.h:53
openshot::Keyframe::GetInt
int GetInt(int64_t index) const
Get the rounded INT value at a specific index.
Definition KeyFrame.cpp:282
openshot::Keyframe::SetJsonValue
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
Definition KeyFrame.cpp:372
openshot::Keyframe::JsonValue
Json::Value JsonValue() const
Generate Json::Value for this object.
Definition KeyFrame.cpp:339
openshot
This namespace is the default namespace for all code in the openshot library.
Definition Compressor.h:29
openshot::stringToJson
const Json::Value stringToJson(const std::string value)
Definition Json.cpp:16