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import unittest
import IECore
import IECoreRI
import os.path
import os

class TextureOrientationTest( IECoreRI.TestCase ) :

	def test( self ) :

		self.assertEqual( os.system( "shaderdl -o test/IECoreRI/shaders/tex.sdl test/IECoreRI/shaders/tex.sl" ), 0 )

		r = IECoreRI.Renderer( "" )
		r.display( "test/IECoreRI/output/testTextureOrientation1.tif", "tiff", "rgba", {} )
		r.worldBegin()
		r.concatTransform( IECore.M44f.createTranslated( IECore.V3f( 0, 0, -5 ) ) )
		r.shader( "surface", "st", {} )
		IECore.MeshPrimitive.createPlane( IECore.Box2f( IECore.V2f( -1 ), IECore.V2f( 1 ) ) ).render( r )
		r.worldEnd()

		del r

		r = IECoreRI.Renderer( "" )
		r.display( "test/IECoreRI/output/testTextureOrientation2.tif", "tiff", "rgba", {} )
 		r.setOption( "ri:searchpath:texture", IECore.StringData( "@:." ) )
		r.worldBegin()
		r.concatTransform( IECore.M44f.createTranslated( IECore.V3f( 0, 0, -5 ) ) )
		r.shader( "surface", "test/IECoreRI/shaders/tex", {} )
		IECore.MeshPrimitive.createPlane( IECore.Box2f( IECore.V2f( -1 ), IECore.V2f( 1 ) ) ).render( r )
		r.worldEnd()

		ie = IECore.ImageReader.create( "test/IECoreRI/data/textureOrientationImages/expected.tif" ).read()
		i1 = IECore.ImageReader.create( "test/IECoreRI/output/testTextureOrientation1.tif" ).read()
		i2 = IECore.ImageReader.create( "test/IECoreRI/output/testTextureOrientation2.tif" ).read()

		testOp = IECore.ImageDiffOp()

		self.assert_( not testOp( imageA=ie, imageB=i1, maxError=0.003 ).value )
		self.assert_( not testOp( imageA=ie, imageB=i2, maxError=0.003 ).value )

	def tearDown( self ) :

		IECoreRI.TestCase.tearDown( self )
		
		files = [
			"test/IECoreRI/shaders/tex.sdl",
		]
		for f in files :
			if os.path.exists( f ) :
				os.remove( f )

if __name__ == "__main__":
    unittest.main()
