101 строка
3.2 KiB
Python
Исполняемый файл
101 строка
3.2 KiB
Python
Исполняемый файл
#!/usr/bin/env pytest
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###############################################################################
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# $Id$
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#
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# Project: GDAL/OGR Test Suite
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# Purpose: Test gdal.ComputeMedianCutPCT() and gdal.DitherRGB2PCT()
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# Author: Frank Warmerdam <warmerdam@pobox.com>
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#
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###############################################################################
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# Copyright (c) 2008, Frank Warmerdam <warmerdam@pobox.com>
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# Copyright (c) 2008-2009, Even Rouault <even dot rouault at spatialys.com>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a
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# copy of this software and associated documentation files (the "Software"),
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# to deal in the Software without restriction, including without limitation
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# the rights to use, copy, modify, merge, publish, distribute, sublicense,
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# and/or sell copies of the Software, and to permit persons to whom the
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# Software is furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included
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# in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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# DEALINGS IN THE SOFTWARE.
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###############################################################################
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import pytest
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from osgeo import gdal
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###############################################################################
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# Test
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def test_dither_1():
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drv = gdal.GetDriverByName("GTiff")
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src_ds = gdal.Open("../gdrivers/data/rgbsmall.tif")
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r_band = src_ds.GetRasterBand(1)
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g_band = src_ds.GetRasterBand(2)
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b_band = src_ds.GetRasterBand(3)
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dst_ds = drv.Create(
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"tmp/rgbsmall.tif", src_ds.RasterXSize, src_ds.RasterYSize, 1, gdal.GDT_Byte
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)
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dst_band = dst_ds.GetRasterBand(1)
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ct = gdal.ColorTable()
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nColors = 8
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gdal.ComputeMedianCutPCT(r_band, g_band, b_band, nColors, ct)
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dst_band.SetRasterColorTable(ct)
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gdal.DitherRGB2PCT(r_band, g_band, b_band, dst_band, ct)
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cs_expected = 8803
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cs = dst_band.Checksum()
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dst_band = None
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dst_ds = None
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assert ct.GetCount() == nColors, "color table size wrong"
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ref_ct = [
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(36, 48, 32, 255),
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(92, 120, 20, 255),
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(88, 96, 20, 255),
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(92, 132, 56, 255),
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(0, 0, 0, 255),
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(96, 152, 24, 255),
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(60, 112, 32, 255),
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(164, 164, 108, 255),
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]
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for i in range(nColors):
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ct_data = ct.GetColorEntry(i)
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ref_data = ref_ct[i]
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for j in range(4):
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if ct_data[j] != ref_data[j]:
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for k in range(nColors):
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print(ct.GetColorEntry(k))
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print(ref_ct[k])
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pytest.fail("color table mismatch")
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if cs == cs_expected or gdal.GetConfigOption("CPL_DEBUG", "OFF") != "ON":
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drv.Delete("tmp/rgbsmall.tif")
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if cs != cs_expected:
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print("Got: ", cs)
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pytest.fail("got wrong checksum")
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