OpenShot Library | libopenshot  0.3.3
Public Member Functions | Public Attributes | List of all members
openshot::Crop Class Reference

This class crops a frame image (from any side), and can be animated with openshot::Keyframe curves over time. More...

#include <effects/Crop.h>

Inheritance diagram for openshot::Crop:
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Collaboration diagram for openshot::Crop:
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Public Member Functions

 Crop ()
 Blank constructor, useful when using Json to load the effect properties. More...
 
 Crop (Keyframe left, Keyframe top, Keyframe right, Keyframe bottom, Keyframe x=0.0, Keyframe y=0.0)
 
std::shared_ptr< openshot::FrameGetFrame (int64_t frame_number) override
 This method is required for all derived classes of ClipBase, and returns a new openshot::Frame object. All Clip keyframes and effects are resolved into pixels. More...
 
std::shared_ptr< openshot::FrameGetFrame (std::shared_ptr< openshot::Frame > frame, int64_t frame_number) override
 This method is required for all derived classes of ClipBase, and returns a modified openshot::Frame object. More...
 
std::string Json () const override
 Generate JSON string of this object. More...
 
Json::Value JsonValue () const override
 Generate Json::Value for this object. More...
 
std::string PropertiesJSON (int64_t requested_frame) const override
 
void SetJson (const std::string value) override
 Load JSON string into this object. More...
 
void SetJsonValue (const Json::Value root) override
 Load Json::Value into this object. More...
 
- Public Member Functions inherited from openshot::EffectBase
Json::Value BasePropertiesJSON (int64_t requested_frame) const
 Generate JSON object of base properties (recommended to be used by all effects) More...
 
int constrain (int color_value)
 Constrain a color value from 0 to 255. More...
 
void DisplayInfo (std::ostream *out=&std::cout)
 Display effect information in the standard output stream (stdout) More...
 
virtual std::string GetVisibleObjects (int64_t frame_number) const
 Get the indexes and IDs of all visible objects in the given frame. More...
 
void InitEffectInfo ()
 
virtual std::string Json (int64_t requested_frame) const
 
Json::Value JsonInfo () const
 Generate JSON object of meta data / info. More...
 
int Order () const
 Get the order that this effect should be executed. More...
 
void Order (int new_order)
 Set the order that this effect should be executed. More...
 
openshot::ClipBaseParentClip ()
 Parent clip object of this effect (which can be unparented and NULL) More...
 
void ParentClip (openshot::ClipBase *new_clip)
 Set parent clip object of this effect. More...
 
std::string ParentClipId () const
 Return the ID of this effect's parent clip. More...
 
virtual void SetJson (int64_t requested_frame, const std::string value)
 
void SetParentEffect (std::string parentEffect_id)
 Set the parent effect from which this properties will be set to. More...
 
virtual ~EffectBase ()=default
 
- Public Member Functions inherited from openshot::ClipBase
 ClipBase ()
 Constructor for the base clip. More...
 
virtual void End (float value)
 Set end position (in seconds) of clip (trim end of video) More...
 
void Id (std::string value)
 
void Layer (int value)
 Set layer of clip on timeline (lower number is covered by higher numbers) More...
 
bool operator< (ClipBase &a)
 
bool operator<= (ClipBase &a)
 
bool operator> (ClipBase &a)
 
bool operator>= (ClipBase &a)
 
void Position (float value)
 

Set the Id of this clip object

More...
 
void Start (float value)
 Set start position (in seconds) of clip (trim start of video) More...
 
virtual ~ClipBase ()=default
 

Public Attributes

Keyframe bottom
 Size of bottom bar. More...
 
Keyframe left
 Size of left bar. More...
 
bool resize
 Auto-resize image after crop operation. More...
 
Keyframe right
 Size of right bar. More...
 
Keyframe top
 Size of top bar. More...
 
Keyframe x
 X-offset. More...
 
Keyframe y
 Y-offset. More...
 
- Public Attributes inherited from openshot::EffectBase
EffectInfoStruct info
 Information about the current effect. More...
 
EffectBaseparentEffect
 Parent effect (which properties will set this effect properties) More...
 
std::map< int, std::shared_ptr< openshot::TrackedObjectBase > > trackedObjects
 Map of Tracked Object's by their indices (used by Effects that track objects on clips) More...
 

Additional Inherited Members

- Protected Member Functions inherited from openshot::ClipBase
Json::Value add_property_choice_json (std::string name, int value, int selected_value) const
 Generate JSON choice for a property (dropdown properties) More...
 
Json::Value add_property_json (std::string name, float value, std::string type, std::string memo, const Keyframe *keyframe, float min_value, float max_value, bool readonly, int64_t requested_frame) const
 Generate JSON for a property. More...
 
- Protected Attributes inherited from openshot::EffectBase
openshot::ClipBaseclip
 Pointer to the parent clip instance (if any) More...
 
- Protected Attributes inherited from openshot::ClipBase
float end
 The position in seconds to end playing (used to trim the ending of a clip) More...
 
std::string id
 ID Property for all derived Clip and Effect classes. More...
 
int layer
 The layer this clip is on. Lower clips are covered up by higher clips. More...
 
float position
 The position on the timeline where this clip should start playing. More...
 
std::string previous_properties
 This string contains the previous JSON properties. More...
 
float start
 The position in seconds to start playing (used to trim the beginning of a clip) More...
 
openshot::TimelineBasetimeline
 Pointer to the parent timeline instance (if any) More...
 

Detailed Description

This class crops a frame image (from any side), and can be animated with openshot::Keyframe curves over time.

Cropping images can be useful when wanting to remove a border around an image or video, and animating the crop can create some very interesting effects.

Definition at line 37 of file Crop.h.

Constructor & Destructor Documentation

◆ Crop() [1/2]

Crop::Crop ( )

Blank constructor, useful when using Json to load the effect properties.

Default constructor, useful when using Json to load the effect properties.

Definition at line 26 of file Crop.cpp.

◆ Crop() [2/2]

Crop::Crop ( Keyframe  left,
Keyframe  top,
Keyframe  right,
Keyframe  bottom,
Keyframe  x = 0.0,
Keyframe  y = 0.0 
)

Default constructor, which takes 4 curves. These curves animate the crop over time.

Parameters
leftThe curve to adjust the left bar size (between 0 and 1)
topThe curve to adjust the top bar size (between 0 and 1)
rightThe curve to adjust the right bar size (between 0 and 1)
bottomThe curve to adjust the bottom bar size (between 0 and 1)
xx-offset of original image in output frame (-1.0 - 1.0)
yy-offset of original image in output frame (-1.0 - 1.0)

Definition at line 28 of file Crop.cpp.

Member Function Documentation

◆ GetFrame() [1/2]

std::shared_ptr<openshot::Frame> openshot::Crop::GetFrame ( int64_t  frame_number)
inlineoverridevirtual

This method is required for all derived classes of ClipBase, and returns a new openshot::Frame object. All Clip keyframes and effects are resolved into pixels.

Returns
A new openshot::Frame object
Parameters
frame_numberThe frame number (starting at 1) of the clip or effect on the timeline.

Implements openshot::ClipBase.

Definition at line 74 of file Crop.h.

◆ GetFrame() [2/2]

std::shared_ptr< openshot::Frame > Crop::GetFrame ( std::shared_ptr< openshot::Frame frame,
int64_t  frame_number 
)
overridevirtual

This method is required for all derived classes of ClipBase, and returns a modified openshot::Frame object.

The frame object is passed into this method and used as a starting point (pixels and audio). All Clip keyframes and effects are resolved into pixels.

Returns
The modified openshot::Frame object
Parameters
frameThe frame object that needs the clip or effect applied to it
frame_numberThe frame number (starting at 1) of the clip or effect on the timeline.

Implements openshot::ClipBase.

Definition at line 54 of file Crop.cpp.

◆ Json()

std::string Crop::Json ( ) const
overridevirtual

Generate JSON string of this object.

Reimplemented from openshot::EffectBase.

Definition at line 119 of file Crop.cpp.

◆ JsonValue()

Json::Value Crop::JsonValue ( ) const
overridevirtual

Generate Json::Value for this object.

Reimplemented from openshot::EffectBase.

Definition at line 126 of file Crop.cpp.

Referenced by Json().

◆ PropertiesJSON()

std::string Crop::PropertiesJSON ( int64_t  requested_frame) const
overridevirtual

Get all properties for a specific frame (perfect for a UI to display the current state of all properties at any time)

Implements openshot::ClipBase.

Definition at line 184 of file Crop.cpp.

◆ SetJson()

void Crop::SetJson ( const std::string  value)
overridevirtual

Load JSON string into this object.

Reimplemented from openshot::EffectBase.

Definition at line 144 of file Crop.cpp.

◆ SetJsonValue()

void Crop::SetJsonValue ( const Json::Value  root)
overridevirtual

Load Json::Value into this object.

Reimplemented from openshot::EffectBase.

Definition at line 161 of file Crop.cpp.

Referenced by SetJson().

Member Data Documentation

◆ bottom

Keyframe openshot::Crop::bottom

Size of bottom bar.

Definition at line 48 of file Crop.h.

Referenced by GetFrame(), JsonValue(), PropertiesJSON(), and SetJsonValue().

◆ left

Keyframe openshot::Crop::left

Size of left bar.

Definition at line 45 of file Crop.h.

Referenced by GetFrame(), JsonValue(), PropertiesJSON(), and SetJsonValue().

◆ resize

bool openshot::Crop::resize

Auto-resize image after crop operation.

Definition at line 51 of file Crop.h.

Referenced by GetFrame(), JsonValue(), PropertiesJSON(), and SetJsonValue().

◆ right

Keyframe openshot::Crop::right

Size of right bar.

Definition at line 47 of file Crop.h.

Referenced by GetFrame(), JsonValue(), PropertiesJSON(), and SetJsonValue().

◆ top

Keyframe openshot::Crop::top

Size of top bar.

Definition at line 46 of file Crop.h.

Referenced by GetFrame(), JsonValue(), PropertiesJSON(), and SetJsonValue().

◆ x

Keyframe openshot::Crop::x

X-offset.

Definition at line 49 of file Crop.h.

Referenced by GetFrame(), JsonValue(), PropertiesJSON(), and SetJsonValue().

◆ y

Keyframe openshot::Crop::y

Y-offset.

Definition at line 50 of file Crop.h.

Referenced by GetFrame(), JsonValue(), PropertiesJSON(), and SetJsonValue().


The documentation for this class was generated from the following files: