OpenShot Library | libopenshot
0.2.2
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28 #include "../../include/effects/Saturation.h"
35 init_effect_details();
42 init_effect_details();
46 void Saturation::init_effect_details()
64 std::shared_ptr<QImage> frame_image = frame->GetImage();
78 unsigned char *pixels = (
unsigned char *) frame_image->bits();
79 for (
int pixel = 0, byte_index=0; pixel < frame_image->width() * frame_image->height(); pixel++, byte_index+=4)
82 int R = pixels[byte_index];
83 int G = pixels[byte_index + 1];
84 int B = pixels[byte_index + 2];
85 int A = pixels[byte_index + 3];
88 double p = sqrt( (R * R * pR) +
93 R = p + (R - p) * saturation_value;
94 G = p + (G - p) * saturation_value;
95 B = p + (B - p) * saturation_value;
103 pixels[byte_index] = R;
104 pixels[byte_index + 1] = G;
105 pixels[byte_index + 2] = B;
106 pixels[byte_index + 3] = A;
138 bool success = reader.parse( value, root );
141 throw InvalidJSON(
"JSON could not be parsed (or is invalid)",
"");
151 throw InvalidJSON(
"JSON is invalid (missing keys or invalid data types)",
"");
162 if (!root[
"saturation"].isNull())
171 root[
"id"] =
add_property_json(
"ID", 0.0,
"string",
Id(), NULL, -1, -1,
true, requested_frame);
172 root[
"position"] =
add_property_json(
"Position", Position(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
173 root[
"layer"] =
add_property_json(
"Track", Layer(),
"int",
"", NULL, 0, 20,
false, requested_frame);
174 root[
"start"] =
add_property_json(
"Start", Start(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
175 root[
"end"] =
add_property_json(
"End", End(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
false, requested_frame);
176 root[
"duration"] =
add_property_json(
"Duration", Duration(),
"float",
"", NULL, 0, 30 * 60 * 60 * 48,
true, requested_frame);
182 return root.toStyledString();
EffectInfoStruct info
Information about the current effect.
void Id(string value)
Set basic properties.
This namespace is the default namespace for all code in the openshot library.
string class_name
The class name of the effect.
string PropertiesJSON(int64_t requested_frame)
Json::Value JsonValue()
Generate Json::JsonValue for this object.
virtual Json::Value JsonValue()=0
Generate Json::JsonValue for this object.
Json::Value add_property_json(string name, float value, string type, string memo, Keyframe *keyframe, float min_value, float max_value, bool readonly, int64_t requested_frame)
Generate JSON for a property.
double GetValue(int64_t index)
Get the value at a specific index.
A Keyframe is a collection of Point instances, which is used to vary a number or property over time.
Exception for invalid JSON.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
bool has_audio
Determines if this effect manipulates the audio of a frame.
string description
The description of this effect and what it does.
void SetJson(string value)
Load JSON string into this object.
Json::Value JsonValue()
Generate Json::JsonValue for this object.
string name
The name of the effect.
virtual void SetJsonValue(Json::Value root)=0
Load Json::JsonValue into this object.
bool has_video
Determines if this effect manipulates the image of a frame.
std::shared_ptr< Frame > GetFrame(std::shared_ptr< Frame > frame, int64_t frame_number)
This method is required for all derived classes of EffectBase, and returns a modified openshot::Frame...
int constrain(int color_value)
Constrain a color value from 0 to 255.
string Json()
Get and Set JSON methods.
void SetJsonValue(Json::Value root)
Load Json::JsonValue into this object.
Saturation()
Blank constructor, useful when using Json to load the effect properties.
Keyframe saturation
The color saturation: 0.0 = black and white, 1.0 = normal, 2.0 = double saturation.