#!/usr/bin/env python
###############################################################################
# $Id$
#
# Project:  GDAL/OGR Test Suite
# Purpose:  Test ReprojectImage() algorithm.
# Author:   Even Rouault <even dot rouault at mines dash paris dot org>
# 
###############################################################################
# Copyright (c) 2009, Even Rouault <even dot rouault at mines dash paris dot org>
# 
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
###############################################################################

import os
import sys

sys.path.append( '../pymod' )

import gdaltest

try:
    from osgeo import gdal, gdalconst, osr
except:
    import gdal
    import gdalconst
    import osr

###############################################################################
# Test a trivial case.

def reproject_1():

    try:
        x = gdal.ReprojectImage
    except:
        return 'skip'

    drv = gdal.GetDriverByName( 'GTiff' )
    src_ds = gdal.Open('../gcore/data/byte.tif')

    dst_ds = drv.Create('tmp/byte.tif', src_ds.RasterXSize, src_ds.RasterYSize, gdal.GDT_Byte )
    dst_ds.SetProjection(src_ds.GetProjectionRef())
    dst_ds.SetGeoTransform(src_ds.GetGeoTransform())

    gdal.ReprojectImage( src_ds, dst_ds)

    cs_expected = src_ds.GetRasterBand(1).Checksum()
    cs = dst_ds.GetRasterBand(1).Checksum()

    dst_ds = None

    drv.Delete( 'tmp/byte.tif' )

    if cs != cs_expected:
        print('Got: ', cs)
        gdaltest.post_reason( 'got wrong checksum' )
        return 'fail'
    else:
        return 'success' 

###############################################################################
# Test a real reprojection case.

def reproject_2():

    try:
        x = gdal.ReprojectImage
    except:
        return 'skip'

    sr = osr.SpatialReference()
    sr.ImportFromEPSG(32611)

    sr2 = osr.SpatialReference()
    sr2.ImportFromEPSG(4326)

    drv = gdal.GetDriverByName( 'GTiff' )
    src_ds = gdal.Open('../gcore/data/byte.tif')

    dst_ds = drv.Create('tmp/byte_4326.tif', 22, 18, gdal.GDT_Byte )
    dst_ds.SetGeoTransform([-117.641169915168746,0.000598105625684,0,33.900668703925191,0,-0.000598105625684])

    gdal.ReprojectImage( src_ds, dst_ds, sr.ExportToWkt(), sr2.ExportToWkt())

    cs_expected = 4727
    cs = dst_ds.GetRasterBand(1).Checksum()

    dst_ds = None

    drv.Delete( 'tmp/byte_4326.tif' )

    if cs != cs_expected:
        print('Got: ', cs)
        gdaltest.post_reason( 'got wrong checksum' )
        return 'fail'
    else:
        return 'success' 


gdaltest_list = [
    reproject_1,
    reproject_2
    ]

if __name__ == '__main__':

    gdaltest.setup_run( 'reproject' )

    gdaltest.run_tests( gdaltest_list )

    gdaltest.summarize()