Color.cpp
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/**
* @file
* @brief Source file for EffectBase class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @section LICENSE
*
* Copyright (c) 2008-2014 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "../include/Color.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)
{
// Set initial points
red.AddPoint(1, (float)Red);
green.AddPoint(1, (float)Green);
blue.AddPoint(1, (float)Blue);
alpha.AddPoint(1, (float)Alpha);
}
// Constructor which takes 4 existing Keyframe curves
Color::Color(Keyframe Red, Keyframe Green, Keyframe Blue, Keyframe Alpha)
{
// Assign existing keyframes
red = Red;
green = Green;
blue = Blue;
alpha = Alpha;
}
// Constructor which takes a HEX color code
Color::Color(string color_hex)
{
// Create a QColor from hex
QColor color(QString::fromStdString(color_hex));
red.AddPoint(1, color.red());
green.AddPoint(1, color.green());
blue.AddPoint(1, color.blue());
alpha.AddPoint(1, color.alpha());
}
// Get the HEX value of a color at a specific frame
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 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
string Color::Json() {
// Return formatted string
return JsonValue().toStyledString();
}
// Generate Json::JsonValue for this object
Json::Value Color::JsonValue() {
// 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(string value) {
// Parse JSON string into JSON objects
Json::Value root;
Json::Reader reader;
bool success = reader.parse( value, root );
if (!success)
// Raise exception
throw InvalidJSON("JSON could not be parsed (or is invalid)", "");
try
{
// Set all values that match
SetJsonValue(root);
}
catch (exception e)
{
// Error parsing JSON (or missing keys)
throw InvalidJSON("JSON is invalid (missing keys or invalid data types)", "");
}
}
// Load Json::JsonValue into this object
void Color::SetJsonValue(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"]);
}
openshot::Color::Color
Color()
Default constructor.
Definition: Color.h:51
openshot::Color::JsonValue
Json::Value JsonValue()
Generate Json::JsonValue for this object.
Definition: Color.cpp:92
openshot::Color::green
Keyframe green
Curve representing the green value (0 - 255)
Definition: Color.h:46
openshot
This namespace is the default namespace for all code in the openshot library.
Definition: AudioBufferSource.h:45
openshot::Color::GetColorHex
string GetColorHex(int64_t frame_number)
Get the HEX value of a color at a specific frame.
Definition: Color.cpp:64
openshot::Color::SetJsonValue
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
Definition: Color.cpp:129
openshot::Keyframe::GetInt
int GetInt(int64_t index)
Get the rounded INT value at a specific index.
Definition: KeyFrame.cpp:248
openshot::Color::Json
string Json()
Get and Set JSON methods.
Definition: Color.cpp:85
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:75
openshot::Keyframe::AddPoint
void AddPoint(Point p)
Add a new point on the key-frame. Each point has a primary coordinate, a left handle,...
Definition: KeyFrame.cpp:72
openshot::Keyframe
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Definition: KeyFrame.h:64
openshot::InvalidJSON
Exception for invalid JSON.
Definition: Exceptions.h:152
openshot::Color::blue
Keyframe blue
Curve representing the red value (0 - 255)
Definition: Color.h:47
openshot::Keyframe::JsonValue
Json::Value JsonValue()
Generate Json::JsonValue for this object.
Definition: KeyFrame.cpp:321
OpenShot Wipe Tests.e
e
Definition: OpenShot Wipe Tests.py:28
a
#define a
openshot::Color::red
Keyframe red
Curve representing the red value (0 - 255)
Definition: Color.h:45
openshot::Keyframe::SetJsonValue
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
Definition: KeyFrame.cpp:362
openshot::Color::SetJson
void SetJson(string value)
Load JSON string into this object.
Definition: Color.cpp:106
openshot::Color::alpha
Keyframe alpha
Curve representing the alpha value (0 - 255)
Definition: Color.h:48