Collaboration diagram for Single Pixel Access:

Modules
	Bitmask

	Utility Functions

Functions
epr_uint	epr_get_pixel_as_uint (const EPR_SRaster *raster, int x, int y)

int	epr_get_pixel_as_int (const EPR_SRaster *raster, int x, int y)

float	epr_get_pixel_as_float (const EPR_SRaster *raster, int x, int y)

double	epr_get_pixel_as_double (const EPR_SRaster *raster, int x, int y)

Variables
EPR_Magic	magic

char *	file_path

FILE *	istream

epr_uint	tot_size

epr_uint	scene_width

epr_uint	scene_height

char	id_string [EPR_PRODUCT_ID_STRLEN+1]

EPR_SRecord *	mph_record

EPR_SRecord *	sph_record

EPR_SPtrArray *	dsd_array

EPR_SPtrArray *	record_info_cache

EPR_SPtrArray *	param_table

EPR_SPtrArray *	dataset_ids

EPR_SPtrArray *	band_ids

int	meris_iodd_version

EPR_Magic	magic

EPR_SProductId *	product_id

char *	dsd_name

const EPR_SDSD *	dsd

char *	dataset_name

const struct RecordDescriptor *	record_descriptor

EPR_SRecordInfo *	record_info

char *	description

EPR_Magic	magic

int	index

char *	ds_name

char *	ds_type

char *	filename

epr_uint	ds_offset

epr_uint	ds_size

epr_uint	num_dsr

epr_uint	dsr_size

EPR_Magic	magic

EPR_SRecordInfo *	info

epr_uint	num_fields

EPR_SField **	fields

EPR_Magic	magic

EPR_SFieldInfo *	info

void *	elems

EPR_Magic	magic

EPR_EDataTypeId	data_type

epr_uint	elem_size

epr_uint	source_width

epr_uint	source_height

epr_uint	source_step_x

epr_uint	source_step_y

epr_uint	raster_width

epr_uint	raster_height

void *	buffer

EPR_SDatasetId *	dataset_id

int	field_index

int	elem_index

EPR_Magic	magic

char *	name

epr_uint	bit_mask

char *	description

EPR_Magic	magic

EPR_SProductId *	product_id

char *	band_name

int	spectr_band_index

EPR_SDatasetRef	dataset_ref

EPR_ESampleModel	sample_model

EPR_EDataTypeId	data_type

EPR_EScalingMethod	scaling_method

float	scaling_offset

float	scaling_factor

char *	bm_expr

EPR_SPtrArray *	flag_coding

char *	unit

char *	description

epr_boolean	lines_mirrored

int	days

epr_uint	seconds

epr_uint	microseconds

Detailed Description

Function Documentation

◆ epr_get_pixel_as_double()

double epr_get_pixel_as_double	(	const EPR_SRaster *	raster,
		int	x,
		int	y
	)

Definition at line 815 of file epr_bitmask.c.

◆ epr_get_pixel_as_float()

float epr_get_pixel_as_float	(	const EPR_SRaster *	raster,
		int	x,
		int	y
	)

Definition at line 789 of file epr_bitmask.c.

◆ epr_get_pixel_as_int()

int epr_get_pixel_as_int	(	const EPR_SRaster *	raster,
		int	x,
		int	y
	)

Definition at line 762 of file epr_bitmask.c.

◆ epr_get_pixel_as_uint()

epr_uint epr_get_pixel_as_uint	(	const EPR_SRaster *	raster,
		int	x,
		int	y
	)

This group of functions is for getting the values of the elements of a raster (i.e. pixel) in a type-safe way.

Parameters

raster	the raster which contains the pixel, must not be `NULL`
x	the (zero-based) X co-ordinate of the pixel
y	the (zero-based) Y co-ordinate of the pixel

Returns: the typed value at the given co-ordinate.

Definition at line 736 of file epr_bitmask.c.

Variable Documentation

◆ band_ids

EPR_SPtrArray* band_ids

Contains and array of all band IDs for the product (type EPR_SBandId*)

Definition at line 305 of file epr_api.h.

◆ band_name

char* band_name

The name as presented to the user in a band selection dialog (also known as spectral subset)

Definition at line 636 of file epr_api.h.

◆ bit_mask

epr_uint bit_mask

The bit mask describing this flag

Definition at line 601 of file epr_api.h.

◆ bm_expr

char* bm_expr

A bit-mask expression used to filter valid pixels. All others are set to zero.

Definition at line 707 of file epr_api.h.

◆ buffer

void* buffer

The elements of this raster.
Its volume is raster_width * raster_height * sizeof(data_type) in bytes.

Definition at line 559 of file epr_api.h.

◆ data_type [1/2]

EPR_EDataTypeId data_type

The data type of the band's pixel values.
All corresponding with EPR_DataTypeId types are possible

Definition at line 516 of file epr_api.h.

◆ data_type [2/2]

EPR_EDataTypeId data_type

The data type of the band's pixel values. Possible values are:

* --> the datatype remains unchanged.
uint8_t --> 8-bit unsigned integer
uint32_t --> 32-bit unsigned integer
Float --> 32-bit IEEE floating point

Definition at line 669 of file epr_api.h.

◆ dataset_id

EPR_SDatasetId* dataset_id

Definition at line 577 of file epr_api.h.

◆ dataset_ids

EPR_SPtrArray* dataset_ids

Contains and array of all dataset IDs for the product (type EPR_SDatasetId*)

Definition at line 300 of file epr_api.h.

◆ dataset_name

char* dataset_name

The name as presented to the user in a dataset selection dialog

Definition at line 350 of file epr_api.h.

◆ dataset_ref

EPR_SDatasetRef dataset_ref

The reference of the source dataset containing the raw data used to create the band's pixel values. The external format used in the DDDB is MDS-name.field, where field is a one-based index (field=1 corresponds to the first field)

Definition at line 649 of file epr_api.h.

◆ days

int days

Definition at line 741 of file epr_api.h.

◆ description [1/3]

char* description

A short description of the band's contents

Definition at line 366 of file epr_api.h.

◆ description [2/3]

char* description

The flag description.

Definition at line 606 of file epr_api.h.

◆ description [3/3]

char* description

A short description of the band's contents

Definition at line 724 of file epr_api.h.

◆ ds_name

char* ds_name

The dataset name.

Definition at line 391 of file epr_api.h.

◆ ds_offset

epr_uint ds_offset

The offset of dataset-information the product file.

Definition at line 406 of file epr_api.h.

◆ ds_size

epr_uint ds_size

The size of dataset-information in dataset product file.

Definition at line 411 of file epr_api.h.

◆ ds_type

char* ds_type

The dataset type descriptor.

Definition at line 396 of file epr_api.h.

◆ dsd

const EPR_SDSD* dsd

The dataset descriptor obtained from the current product.

Definition at line 345 of file epr_api.h.

◆ dsd_array

EPR_SPtrArray* dsd_array

An array containing all (!) DSDs read from the product's specific product header (SPH).

Definition at line 276 of file epr_api.h.

◆ dsd_name

char* dsd_name

The name as presented to the user in a dsd selection dialog

Definition at line 340 of file epr_api.h.

◆ dsr_size

epr_uint dsr_size

The size of dataset record for the given dataset name.

Definition at line 421 of file epr_api.h.

◆ elem_index

int elem_index

Definition at line 579 of file epr_api.h.

◆ elem_size

epr_uint elem_size

The size in byte of a single element (sample) of this raster's buffer.

Definition at line 521 of file epr_api.h.

◆ elems

void* elems

The elements of this field.

In order to use the data, this member must be casted to one of the following array data types:

unsigned char* - array of unsigned 8-bit integer elements
char* - array of signed 8-bit integer fields
unsigned short* - array of unsigned 16-bit integer elements
short* - array of signed 16-bit integer elements
unsigned int* - array of unsigned 32-bit integer elements
int* - array of signed 32-bit integer elements
float* - array of signed 32-bit floating point elements
double* - array of signed 64-bit floating point elements
EPR_STime* - array of MJD elements

Dedicated access routine are available The element type is given by info->data_type_id and the array length by info->num_elems.

Definition at line 497 of file epr_api.h.

◆ field_index

int field_index

Definition at line 578 of file epr_api.h.

◆ fields

EPR_SField** fields

The record fields. An array of EPR_Field* of length info->num_fields

Definition at line 454 of file epr_api.h.

◆ file_path

char* file_path

The file's path including the file name.

Definition at line 229 of file epr_api.h.

◆ filename

char* filename

The filename in the DDDB with the description of this dataset.

Definition at line 401 of file epr_api.h.

◆ flag_coding

EPR_SPtrArray* flag_coding

The flag coding is a list of EPR_SFlag instances. It determines each of the flags used in this band (= flags dataset). Each flag has a name, a bit-index and a description.

Definition at line 714 of file epr_api.h.

◆ id_string

char id_string[EPR_PRODUCT_ID_STRLEN+1]

The product identifier string obtained from the MPH parameter 'PRODUCT'.

The first 10 characters of this string identify the the product type, e.g. "MER_1P__FR" for a MERIS Level 1b full resolution product. The rest of the string decodes product instance properties.

Definition at line 260 of file epr_api.h.

◆ index

int index

The index of this DSD (zero-based)

Definition at line 386 of file epr_api.h.

◆ info [1/2]

EPR_SRecordInfo* info

The corresponding record info for this record (a 'soft' pointer).

Definition at line 441 of file epr_api.h.

◆ info [2/2]

EPR_SFieldInfo* info

The corresponding field info for this field. supplierCardinality 1

Definition at line 475 of file epr_api.h.

◆ istream

FILE* istream

The input stream as returned by the ANSI C fopen function for the given file path.

Definition at line 235 of file epr_api.h.

◆ lines_mirrored

epr_boolean lines_mirrored

If true (=1) lines will be mirrored (flipped) after read into a raster in order to ensure a pixel ordering in raster X direction from WEST to EAST.

Definition at line 731 of file epr_api.h.