The Image Util Transform APIs provides functions for transfroming of images .

Required Header

#include <image_util.h>

Overview

Image Util API provides support for transforming of images. The API allows :

Image transformation(Colorspace conversion/Resize/Rotate/Crop) .

The API allows to transform(Colorspace conversion/Resize/Rotate/Crop) including convert the colorspace(image_util_colorspace_e) of an image by calling image_util_transform_run() function.

Functions
int	image_util_transform_create (transformation_h *handle)
	Creates a handle to image util transform.
int	image_util_transform_set_hardware_acceleration (transformation_h handle, bool mode)
	Sets the image util's accurate mode.
int	image_util_transform_set_colorspace (transformation_h handle, image_util_colorspace_e colorspace)
	Sets the information of the converting.
int	image_util_transform_set_resolution (transformation_h handle, unsigned int width, unsigned int height)
	Sets the information of the resizing.
int	image_util_transform_set_rotation (transformation_h handle, image_util_rotation_e rotation)
	Sets the information of the rotating.
int	image_util_transform_set_crop_area (transformation_h handle, unsigned int start_x, unsigned int start_y, unsigned int end_x, unsigned int end_y)
	Sets the information of the cropping.
int	image_util_transform_get_colorspace (transformation_h handle, image_util_colorspace_e *colorspace)
	Gets the colorspace of the image buffer.
int	image_util_transform_get_resolution (transformation_h handle, unsigned int width, unsigned int height)
	Gets the resolution of the image buffer.
int	image_util_transform_get_rotation (transformation_h handle, image_util_rotation_e *rotation)
	Gets the information of the rotating.
int	image_util_transform_get_crop_area (transformation_h handle, unsigned int start_x, unsigned int start_y, unsigned int end_x, unsigned int end_y)
	Gets the information of the cropping.
int	image_util_transform_run (transformation_h handle, media_packet_h src, image_util_transform_completed_cb callback, void *user_data)
	Transforms the image for given image util handle.
int	image_util_transform_destroy (transformation_h handle)
	Destroys a handle to image util.
Typedefs
typedef struct transformation_s *	transformation_h
	Image util handle.
typedef void(*	image_util_transform_completed_cb )(media_packet_h dst, int error_code, void user_data)
	Called when transform is finished just before returning the output.

Typedef Documentation

typedef void(* image_util_transform_completed_cb)(media_packet_h *dst, int error_code, void *user_data)

Called when transform is finished just before returning the output.

Since :: 2.3.1

Remarks:: The dst should be released using media_packet_destroy().
The callback is called in a separate thread(not in the main loop).

Parameters:

[in,out]	dst	The result buffer of image util transform
[in]	error_code	The error code of image util transform
[in]	user_data	The user data passed from the callback registration function

Precondition:: image_util_transform_run() will invoke this function.

typedef struct transformation_s* transformation_h

Image util handle.

Since :: 2.3.1

Enumeration Type Documentation

enum image_util_rotation_e

Enumeration for rotation.

Since :: 2.3.1

Enumerator:

IMAGE_UTIL_ROTATION_NONE	None
IMAGE_UTIL_ROTATION_90	Rotation 90 degree
IMAGE_UTIL_ROTATION_180	Rotation 180 degree
IMAGE_UTIL_ROTATION_270	Rotation 270 degree
IMAGE_UTIL_ROTATION_FLIP_HORZ	Flip horizontal
IMAGE_UTIL_ROTATION_FLIP_VERT	Flip vertical

Function Documentation

int image_util_transform_create ( transformation_h * handle )

Creates a handle to image util transform.

This function creates a handle to image util transform.

Since :: 2.3.1

Remarks:: The handle should be released using image_util_transform_destroy().

Parameters:

[out] handle A handle to image util transform

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_OUT_OF_MEMORY	Out of memory

See also:: image_util_transform_destroy()

int image_util_transform_destroy ( transformation_h handle )

Destroys a handle to image util.

The function frees all resources related to the image util handle. The image util handle no longer can be used to perform any operation. A new image util handle has to be created before the next usage.

Since :: 2.3.1

Parameters:

[in] handle The handle to image util transform

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter

See also:: image_util_transform_create()

int image_util_transform_get_colorspace	(	transformation_h	handle,
		image_util_colorspace_e *	colorspace
	)

Gets the colorspace of the image buffer.

Since :: 2.3.1

Parameters:

[in]	handle	The handle to image util transform
[in,out]	colorspace	The colorspace of the image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation
IMAGE_UTIL_ERROR_NOT_SUPPORTED_FORMAT	Not supported format

Precondition:: image_util_transform_create().
image_util_transform_set_crop_area().

See also:: image_util_transform_create(); image_util_transform_destroy()

int image_util_transform_get_crop_area	(	transformation_h	handle,
		unsigned int *	start_x,
		unsigned int *	start_y,
		unsigned int *	end_x,
		unsigned int *	end_y
	)

Gets the information of the cropping.

Since :: 2.3.1

Parameters:

[in]	handle	The handle to image util transform
[in,out]	start_x	The start x position of cropped source image buffer
[in,out]	start_y	The start y position of cropped source image buffer
[in,out]	end_x	The end x position of cropped source image buffer
[in,out]	end_y	The end y position of cropped source image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: image_util_transform_create().
image_util_transform_set_crop_area().

See also:: image_util_transform_create(); image_util_transform_destroy()

int image_util_transform_get_resolution	(	transformation_h	handle,
		unsigned int *	width,
		unsigned int *	height
	)

Gets the resolution of the image buffer.

Since :: 2.3.1

Parameters:

[in]	handle	The handle to image util transform
[in,out]	width	The width of source image buffer
[in,out]	height	The height of source image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: image_util_transform_create().
image_util_transform_set_resolution().

See also:: image_util_transform_create(); image_util_transform_destroy()

int image_util_transform_get_rotation	(	transformation_h	handle,
		image_util_rotation_e *	rotation
	)

Gets the information of the rotating.

Since :: 2.3.1

Parameters:

[in]	handle	The handle to image util transform
[in,out]	rotation	The rotation value of image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: image_util_transform_create().
image_util_transform_set_rotation().

See also:: image_util_transform_create(); image_util_transform_destroy()

int image_util_transform_run	(	transformation_h	handle,
		media_packet_h	src,
		image_util_transform_completed_cb	callback,
		void *	user_data
	)

Transforms the image for given image util handle.

The function execute asynchronously, which contains complete callback
If you set more than two transforming, the order of running is crop or resolution, colorspace converting, rotation.

Since :: 2.3.1

Remarks:: If H/W acceleration is not set, transformation is done via S/W acceleration.

Parameters:

[in]	handle	The handle of transform
[in]	src	The handle to image util transform
[in]	callback	The callback function to be invoked
[in]	user_data	The user data to be passed to the callback function

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation

See also:: image_util_transform_create(); image_util_transform_set_hardware_acceleration; image_util_transform_destroy()

int image_util_transform_set_colorspace	(	transformation_h	handle,
		image_util_colorspace_e	colorspace
	)

Sets the information of the converting.

Since :: 2.3.1

Parameters:

[in]	handle	The handle to image util transform
[in]	colorspace	The colorspace of the image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation
IMAGE_UTIL_ERROR_NOT_SUPPORTED_FORMAT	Not supported format

Precondition:: image_util_transform_create().

See also:: image_util_transform_create(); image_util_transform_run(); image_util_transform_destroy()

int image_util_transform_set_crop_area	(	transformation_h	handle,
		unsigned int	start_x,
		unsigned int	start_y,
		unsigned int	end_x,
		unsigned int	end_y
	)

Sets the information of the cropping.

Since :: 2.3.1

Remarks:: image_util_transform_set_resolution and image_util_transform_set_crop_area can't do that at the same time.

Parameters:

[in]	handle	The handle to image util transform
[in]	start_x	The start x position of cropped image buffer
[in]	start_y	The start y position of cropped image buffer
[in]	end_x	The end x position of cropped image buffer
[in]	end_y	The end y position of cropped image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: image_util_transform_create().

See also:: image_util_transform_create(); image_util_transform_run(); image_util_transform_destroy()

int image_util_transform_set_hardware_acceleration	(	transformation_h	handle,
		bool	mode
	)

Sets the image util's accurate mode.

This function set if you use hardware acceleration or not.

Since :: 2.3.1

Remarks:: The value returned will be IMAGE_UTIL_ERROR_NOT_SUPPORTED, if H/W acceleration doesn't support on the device.

Parameters:

[in]	handle	The handle to image util
[in]	mode	Set `true`, user can use the hardware acceleration otherwise set `false` if user can only software image processing

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation
IMAGE_UTIL_ERROR_NOT_SUPPORTED	The application does not have the hardware acceleration

Precondition:: image_util_transform_create().

See also:: image_util_transform_create(); image_util_transform_destroy()

int image_util_transform_set_resolution	(	transformation_h	handle,
		unsigned int	width,
		unsigned int	height
	)

Sets the information of the resizing.

Since :: 2.3.1

Remarks:: image_util_transform_set_resolution and image_util_transform_set_crop_area can't do that at the same time.

Parameters:

[in]	handle	The handle to image util transform
[in]	width	The width of image buffer
[in]	height	The height of image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: image_util_transform_create().

See also:: image_util_transform_create(); image_util_transform_run(); image_util_transform_destroy()

int image_util_transform_set_rotation	(	transformation_h	handle,
		image_util_rotation_e	rotation
	)

Sets the information of the rotating.

Since :: 2.3.1

Parameters:

[in]	handle	The handle to image util transform
[in]	rotation	The rotation value of image buffer

Returns:: 0 on success, otherwise a negative error value

Return values:

IMAGE_UTIL_ERROR_NONE	Successful
IMAGE_UTIL_ERROR_INVALID_PARAMETER	Invalid parameter
IMAGE_UTIL_ERROR_INVALID_OPERATION	Invalid operation

Precondition:: image_util_transform_create().

See also:: image_util_transform_create(); image_util_transform_run(); image_util_transform_destroy()

Required Header

Overview

Functions

Typedefs

Typedef Documentation

Enumeration Type Documentation

Function Documentation