Module: FFI::GDAL

Extended by:
Library
Defined in:
lib/ffi/gdal.rb,
lib/ffi/gdal/alg.rb,
lib/ffi/gdal/gcp.rb,
lib/ffi/gdal/vrt.rb,
lib/ffi/gdal/gdal.rb,
lib/ffi/gdal/grid.rb,
lib/ffi/gdal/warper.rb,
lib/ffi/gdal/version.rb,
lib/ffi/gdal/matching.rb,
lib/ffi/gdal/rpc_info.rb,
lib/ffi/gdal/exceptions.rb,
lib/ffi/gdal/color_entry.rb,
lib/ffi/gdal/warp_options.rb,
lib/ffi/gdal/transformer_info.rb,
lib/ffi/extensions/gdal/extensions.rb,
lib/ffi/gdal/grid_data_metrics_options.rb,
lib/ffi/gdal/grid_moving_average_options.rb,
lib/ffi/gdal/grid_nearest_neighbor_options.rb,
lib/ffi/gdal/grid_inverse_distance_to_a_power_options.rb

Defined Under Namespace

Modules: Alg, Extensions, GDAL, Grid, Matching, VRT, Warper Classes: ColorEntry, GCP, GridDataMetricsOptions, GridInverseDistanceToAPowerOptions, GridMovingAverageOptions, GridNearestNeighborOptions, LibraryNotFound, RPCInfo, TransformerInfo, WarpOptions

Constant Summary collapse

VERSION = 
"1.0.4"

Class Method Summary collapse

Methods included from Library

attach_function, old_attach_function, unsupported_gdal_functions

Class Method Details

._file_with_constants(file_name) ⇒ String

Locates one of the files that has constants.

Returns:

  • (String) —

    Full path to file_name.



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# File 'lib/ffi/gdal.rb', line 55

def self._file_with_constants(file_name)
  _files_with_constants.find { |f| f.end_with?(file_name) }
end

._files_with_constants ⇒ Array<String>

Returns Related files that contain C constants.

Returns:

  • (Array<String>) —

    Related files that contain C constants.



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# File 'lib/ffi/gdal.rb', line 35

def self._files_with_constants
  header_files = %w[
    cpl_conv.h cpl_error.h cpl_port.h cpl_string.h cpl_vsi.h
    gdal.h gdal_alg.h gdal_vrt.h gdalwarper.h
    ogr_core.h ogr_srs_api.h
  ]

  header_search_paths = %w[/usr/local/include /usr/include /usr/include/gdal]

  header_files.map do |file|
    dir = header_search_paths.find do |d|
      File.exist?("#{d}/#{file}")
    end
    dir ? "#{dir}/#{file}" : nil
  end.compact
end

.gdal_library_path ⇒ String

Returns:



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# File 'lib/ffi/gdal.rb', line 30

def self.gdal_library_path
  @gdal_library_path ||= ENV.fetch("GDAL_LIBRARY_PATH", "gdal")
end