def glGetTexImage( target, level,format,type, outputType=str ): """Get a texture-level as an image target -- enum constant for the texture engine to be read level -- the mip-map level to read format -- image format to read out the data type -- data-type into which to read the data outputType -- default (str) provides string output of the results iff OpenGL.UNSIGNED_BYTE_IMAGES_AS_STRING is True and type == GL_UNSIGNED_BYTE. Any other value will cause output in the default array output format. returns the pixel data array in the format defined by the format, type and outputType """ from OpenGL.GL import glget dims = [glget.glGetTexLevelParameteriv( target, level, simple.GL_TEXTURE_WIDTH )] if target != simple.GL_TEXTURE_1D: dims.append( glget.glGetTexLevelParameteriv( target, level, simple.GL_TEXTURE_HEIGHT ) ) if target != simple.GL_TEXTURE_2D: dims.append( glget.glGetTexLevelParameteriv( target, level, simple.GL_TEXTURE_DEPTH ) ) array = images.SetupPixelRead( format, tuple(dims), type ) arrayType = arrays.GL_CONSTANT_TO_ARRAY_TYPE[ images.TYPE_TO_ARRAYTYPE.get(type,type) ] simple.glGetTexImage( target, level, format, type, ctypes.c_void_p( arrayType.dataPointer(array)) ) if outputType is str: return images.returnFormat( array, type ) else: return array
def glGetTexImage( target, level,format,type=type ): """Get a texture-level as an image""" from OpenGL.GL import glget dims = [glget.glGetTexLevelParameteriv( target, level, simple.GL_TEXTURE_WIDTH )] if target != simple.GL_TEXTURE_1D: dims.append( glget.glGetTexLevelParameteriv( target, level, simple.GL_TEXTURE_HEIGHT ) ) if target != simple.GL_TEXTURE_2D: dims.append( glget.glGetTexLevelParameteriv( target, level, simple.GL_TEXTURE_DEPTH ) ) array = images.SetupPixelRead( format, tuple(dims), type ) arrayType = arrays.GL_CONSTANT_TO_ARRAY_TYPE[ images.TYPE_TO_ARRAYTYPE.get(type,type) ] simple.glGetTexImage( target, level, format, type, ctypes.c_void_p( arrayType.dataPointer(array)) ) return array
def glGetCompressedTexImageARB( target, level, img=None ):
"""Retrieve a compressed texture image"""
if img is None:
length = glget.glGetTexLevelParameteriv(
target, 0,
GL_TEXTURE_COMPRESSED_IMAGE_SIZE_ARB,
)
img = arrays.ArrayDataType.zeros( (length,), constants.GL_UNSIGNED_BYTE )
return glGetCompressedTexImageARB(target, 0, img);
