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doinachiroiu 2020-09-24 09:40:30 +00:00
parent 2b8a1be547
commit a84fbbac62
2 changed files with 16 additions and 12 deletions
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12
oss-internship-2020/gdal/CMakeLists.txt
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@ -22,7 +22,7 @@ set(CMAKE_CXX_STANDARD_REQUIRED True)
find_package(PNG REQUIRED) find_package(PNG REQUIRED)
find_package(PkgConfig REQUIRED) find_package(PkgConfig REQUIRED)
pkg_check_modules(libpcre REQUIRED IMPORTED_TARGET libpcre) pkg_check_modules(libpcre REQUIRED IMPORTED_TARGET libpcre)
#pkg_check_modules(libproj REQUIRED IMPORTED_TARGET libproj) pkg_check_modules(proj REQUIRED IMPORTED_TARGET proj)
set(SAPI_ROOT "${PROJECT_SOURCE_DIR}/../.." CACHE PATH "Path to the Sandboxed API source tree") set(SAPI_ROOT "${PROJECT_SOURCE_DIR}/../.." CACHE PATH "Path to the Sandboxed API source tree")
# cmake .. -G Ninja -DSAPI_ROOT=$HOME/sapi_root # cmake .. -G Ninja -DSAPI_ROOT=$HOME/sapi_root
@ -40,17 +40,15 @@ set_property(TARGET libgdal PROPERTY IMPORTED_LOCATION "${CMAKE_CURRENT_SOURCE_D
target_link_libraries(libgdal INTERFACE target_link_libraries(libgdal INTERFACE
crypto expat jpeg crypto expat jpeg
PkgConfig::libpcre PkgConfig::libpcre
/usr/lib/libproj.so PkgConfig::proj
sqlite3 tiff z pthread m rt dl curl sqlite3 tiff z pthread m rt dl curl
PNG::PNG) PNG::PNG)
add_sapi_library(gdal_sapi add_sapi_library(gdal_sapi
FUNCTIONS GDALOpen GDALAllRegister GDALGetDatasetDriver FUNCTIONS GDALOpen GDALAllRegister GDALGetDatasetDriver
GDALGetDriverShortName GDALGetDriverLongName GDALGetRasterXSize GDALGetDriverShortName GDALGetDriverLongName
GDALGetRasterYSize GDALGetRasterCount GDALGetProjectionRef GDALGetGeoTransform GDALGetRasterBand GDALGetBlockSize
GDALOpenEx GDALGetGeoTransform GDALGetRasterBand GDALGetBlockSize GDALGetRasterBandXSize GDALGetRasterBandYSize GDALRasterIO
GDALGetRasterMinimum GDALGetRasterMaximum GDALGetRasterBandXSize
GDALGetRasterBandYSize GDALRasterIO
INPUTS "/usr/include/gdal/gdal.h" INPUTS "/usr/include/gdal/gdal.h"
LIBRARY libgdal LIBRARY libgdal

16
oss-internship-2020/gdal/README.md
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@ -20,6 +20,12 @@ PNG: `sudo apt-get install libpng-dev`
PCRE: `sudo apt-get install libpcre3 libpcre3-dev` PCRE: `sudo apt-get install libpcre3 libpcre3-dev`
PROJ: `sudo apt-get install libproj-dev` PROJ: `sudo apt-get install libproj-dev`
OBS! You may need to set `export LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib`.
It is required for libproj.so to be found into
/usr/local/lib/. You can also fix this by typing `locate libproj.so`
which will give you <the_absolute_path_of_libproj.so> and then
`cp <the_absolute_path_of_libproj.so> /usr/local/lib/`.
### Initializing GDAL submodule: ### Initializing GDAL submodule:
`git submodule add https://github.com/OSGeo/gdal/tree/master/gdal` `git submodule add https://github.com/OSGeo/gdal/tree/master/gdal`
@ -33,7 +39,7 @@ GNUmakefile from gdal/gdal can handle building the static library.
`cp gdal/gdal/libgdal.a lib/` `cp gdal/gdal/libgdal.a lib/`
OBS: The file is huge! It may take a while. OBS! The file is huge! It may take a while.
### For testing: ### For testing:
`mkdir build && cd build` `mkdir build && cd build`
@ -54,7 +60,7 @@ using GDAL functionalities and sandboxed methods.
*Sandboxing...* *Sandboxing...*
The purpose of sandboxing is to limit the permissions The purpose of sandboxing is to limit the permissions
and capabilities of library’s methods, in order to and capabilities of library’s methods, in order to
secure the usage of them. After obtaining the sandbox, secure the usage of them. After obtaining the sandbox,
the functions will be called through an Sandbox API the functions will be called through an Sandbox API
@ -64,10 +70,10 @@ using GDAL functionalities and sandboxed methods.
*Raster process...* *Raster process...*
From gdal.h header useful methods are added to sapi From gdal.h header useful methods are added to sapi
library builded with CMake. library builded with CMake.
One .tiff file is manipulated with GDALOpen One .tiff file is manipulated with GDALOpen
functionality, which extracts a pointer to the data set functionality, which extracts a pointer to the data set
containg a list of raster bands, all pertaining to the containg a list of raster bands, all pertaining to the
same area. same area.
@ -75,7 +81,7 @@ using GDAL functionalities and sandboxed methods.
transform, size of raster and various other information transform, size of raster and various other information
are kept into the data set that corresponds to the image. are kept into the data set that corresponds to the image.
To create an array containing the image information, the To create an array containing the image information, the
dimentions needed are extracted using some specific dimentions needed are extracted using some specific
GDAL(X/Y)Size functions applied to the block. GDAL(X/Y)Size functions applied to the block.
GDALRasterBand function takes care of data type conversion, one more step following: placing the GDALRasterBand function takes care of data type conversion, one more step following: placing the