OpenShot Library | libopenshot 0.3.3
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Color.cpp
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1
9// Copyright (c) 2008-2019 OpenShot Studios, LLC
10//
11// SPDX-License-Identifier: LGPL-3.0-or-later
12
13#include <cmath>
14
15#include "Color.h"
16#include "Exceptions.h"
17
18using namespace openshot;
19
20// Constructor which takes R,G,B,A
21Color::Color(unsigned char Red, unsigned char Green, unsigned char Blue, unsigned char Alpha) :
22 red(static_cast<double>(Red)),
23 green(static_cast<double>(Green)),
24 blue(static_cast<double>(Blue)),
25 alpha(static_cast<double>(Alpha)) { }
26
27// Constructor which takes 4 existing Keyframe curves
29 red(Red), green(Green), blue(Blue), alpha(Alpha) { }
30
31// Constructor which takes a QColor
32Color::Color(QColor qcolor) :
33 red(qcolor.red()),
34 green(qcolor.green()),
35 blue(qcolor.blue()),
36 alpha(qcolor.alpha()) { }
37
38
39// Constructor which takes a HEX color code
40Color::Color(std::string color_hex)
41 : Color::Color(QString::fromStdString(color_hex)) {}
42
43Color::Color(const char* color_hex)
44 : Color::Color(QString(color_hex)) {}
45
46// Get the HEX value of a color at a specific frame
47std::string Color::GetColorHex(int64_t frame_number) {
48
49 int r = red.GetInt(frame_number);
50 int g = green.GetInt(frame_number);
51 int b = blue.GetInt(frame_number);
52 int a = alpha.GetInt(frame_number);
53
54 return QColor( r,g,b,a ).name().toStdString();
55}
56
57// Get RGBA values for a specific frame as an integer vector
58std::vector<int> Color::GetColorRGBA(int64_t frame_number) {
59 std::vector<int> rgba;
60 rgba.push_back(red.GetInt(frame_number));
61 rgba.push_back(green.GetInt(frame_number));
62 rgba.push_back(blue.GetInt(frame_number));
63 rgba.push_back(alpha.GetInt(frame_number));
64
65 return rgba;
66}
67
68// Get the distance between 2 RGB pairs (alpha is ignored)
69long Color::GetDistance(long R1, long G1, long B1, long R2, long G2, long B2)
70{
71 long rmean = ( R1 + R2 ) / 2;
72 long r = R1 - R2;
73 long g = G1 - G2;
74 long b = B1 - B2;
75 return sqrt((((512+rmean)*r*r)>>8) + 4*g*g + (((767-rmean)*b*b)>>8));
76}
77
78// Generate JSON string of this object
79std::string Color::Json() const {
80
81 // Return formatted string
82 return JsonValue().toStyledString();
83}
84
85// Generate Json::Value for this object
86Json::Value Color::JsonValue() const {
87
88 // Create root json object
89 Json::Value root;
90 root["red"] = red.JsonValue();
91 root["green"] = green.JsonValue();
92 root["blue"] = blue.JsonValue();
93 root["alpha"] = alpha.JsonValue();
94
95 // return JsonValue
96 return root;
97}
98
99// Load JSON string into this object
100void Color::SetJson(const std::string value) {
101
102 // Parse JSON string into JSON objects
103 try
104 {
105 const Json::Value root = openshot::stringToJson(value);
106 // Set all values that match
107 SetJsonValue(root);
108 }
109 catch (const std::exception& e)
110 {
111 // Error parsing JSON (or missing keys)
112 throw InvalidJSON("JSON is invalid (missing keys or invalid data types)");
113 }
114}
115
116// Load Json::Value into this object
117void Color::SetJsonValue(const Json::Value root) {
118
119 // Set data from Json (if key is found)
120 if (!root["red"].isNull())
121 red.SetJsonValue(root["red"]);
122 if (!root["green"].isNull())
123 green.SetJsonValue(root["green"]);
124 if (!root["blue"].isNull())
125 blue.SetJsonValue(root["blue"]);
126 if (!root["alpha"].isNull())
127 alpha.SetJsonValue(root["alpha"]);
128}
Header file for Color class.
Header file for all Exception classes.
This class represents a color (used on the timeline and clips)
Definition Color.h:27
std::string Json() const
Generate JSON string of this object.
Definition Color.cpp:79
std::string GetColorHex(int64_t frame_number)
Get the HEX value of a color at a specific frame.
Definition Color.cpp:47
openshot::Keyframe blue
Curve representing the red value (0 - 255)
Definition Color.h:32
openshot::Keyframe red
Curve representing the red value (0 - 255)
Definition Color.h:30
openshot::Keyframe green
Curve representing the green value (0 - 255)
Definition Color.h:31
Color()
Default constructor.
Definition Color.h:36
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
Definition Color.cpp:117
openshot::Keyframe alpha
Curve representing the alpha value (0 - 255)
Definition Color.h:33
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
std::vector< int > GetColorRGBA(int64_t frame_number)
Definition Color.cpp:58
void SetJson(const std::string value)
Load JSON string into this object.
Definition Color.cpp:100
Json::Value JsonValue() const
Generate Json::Value for this object.
Definition Color.cpp:86
Exception for invalid JSON.
Definition Exceptions.h:218
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Definition KeyFrame.h:53
int GetInt(int64_t index) const
Get the rounded INT value at a specific index.
Definition KeyFrame.cpp:282
void SetJsonValue(const Json::Value root)
Load Json::Value into this object.
Definition KeyFrame.cpp:372
Json::Value JsonValue() const
Generate Json::Value for this object.
Definition KeyFrame.cpp:339
This namespace is the default namespace for all code in the openshot library.
Definition Compressor.h:29
const Json::Value stringToJson(const std::string value)
Definition Json.cpp:16