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pixel_iterator_exception.go
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/
pixel_iterator_exception.go
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// Copyright 2013 Herbert G. Fischer. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package imagick
/*
#include <wand/MagickWand.h>
*/
import "C"
import (
"fmt"
"unsafe"
)
type PixelIteratorException struct {
kind ExceptionType
description string
}
func (pie *PixelIteratorException) Error() string {
return fmt.Sprintf("%s: %s", pie.kind.String(), pie.description)
}
// Clears any exceptions associated with the iterator
func (pi *PixelIterator) clearException() bool {
return 1 == C.int(C.PixelClearIteratorException(pi.pi))
}
// Returns the kind, reason and description of any error that occurs when using
// other methods in this API
func (pi *PixelIterator) GetLastError() error {
var et C.ExceptionType
csdescription := C.PixelGetIteratorException(pi.pi, &et)
defer relinquishMemory(unsafe.Pointer(csdescription))
if ExceptionType(et) != EXCEPTION_UNDEFINED {
pi.clearException()
return &PixelIteratorException{ExceptionType(C.int(et)), C.GoString(csdescription)}
}
return nil
}
func (pi *PixelIterator) getLastErrorIfFailed(ok C.MagickBooleanType) error {
if C.int(ok) == 0 {
return pi.GetLastError()
} else {
return nil
}
}