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7854d30103
git-svn-id: https://zxing.googlecode.com/svn/trunk@817 59b500cc-1b3d-0410-9834-0bbf25fbcc57
104 lines
4.1 KiB
C#
Executable file
104 lines
4.1 KiB
C#
Executable file
/*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using BitArray = com.google.zxing.common.BitArray;
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namespace com.google.zxing
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{
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/// <summary> <p>Encapsulates a generic black-and-white bitmap -- a collection of pixels in two dimensions.
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/// This unifies many possible representations, like AWT's <code>BufferedImage</code>.</p>
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///
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/// </summary>
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/// <author> srowen@google.com (Sean Owen)
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/// </author>
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public interface MonochromeBitmapSource
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{
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/**
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* @param x horizontal offset, from left, of the pixel
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* @param y vertical offset, from top, of the pixel
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* @return true iff the pixel at (x,y) is black
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*/
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bool isBlack(int x, int y);
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/**
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* <p>Returns an entire row of black/white pixels as an array of bits, where "true" means "black".
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* This is a sort of "bulk get" operation intended to enable efficient access in
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* certain situations.</p>
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*
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* @param y vertical offset, from top, of the row of pixels
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* @param row if not null, {@link BitArray} to write pixels into. If null, a new {@link BitArray}
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* is allocated and returned.
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* @param startX horizontal offset, from left, from which to start getting pixels
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* @param getWidth number of pixels to get from the row
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* @return {@link BitArray} representing the (subset of the) row of pixels. If row parameter
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* was not null, it is returned.
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*/
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BitArray getBlackRow(int y, BitArray row, int startX, int getWidth);
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/**
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* Entirely analogous to {@link #getBlackRow(int, BitArray, int, int)} but gets a column.
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*/
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BitArray getBlackColumn(int x, BitArray column, int startY, int getHeight);
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/**
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* @return height of underlying image
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*/
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int getHeight();
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/**
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* @return width of underlying image
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*/
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int getWidth();
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/**
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* <p>Estimates black point according to the given method, which is optionally parameterized by
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* a single int argument. For {@link BlackPointEstimationMethod#ROW_SAMPLING}, this
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* specifies the row to sample.</p>
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*
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* <p>The estimated value will be used in subsequent computations that rely on an estimated black
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* point.</p>
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*
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* @param method black point estimation method
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* @param argument method-specific argument
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*/
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void estimateBlackPoint(BlackPointEstimationMethod method, int argument);
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/**
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* @return {@link BlackPointEstimationMethod} representing last sampling method used
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*/
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BlackPointEstimationMethod getLastEstimationMethod();
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/**
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* <p>Optional operation which returns an implementation based on the same underlying
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* image, but which behaves as if the underlying image had been rotated 90 degrees
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* counterclockwise. This is useful in the context of 1D barcodes and the
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* {@link DecodeHintType#TRY_HARDER} decode hint, and is only intended to be
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* used in non-resource-constrained environments. Hence, implementations
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* of this class which are only used in resource-constrained mobile environments
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* don't have a need to implement this.</p>
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*
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* @throws IllegalArgumentException if not supported
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*/
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MonochromeBitmapSource rotateCounterClockwise();
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/**
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* @return true iff rotation is supported
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* @see #rotateCounterClockwise()
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*/
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bool isRotateSupported();
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}
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} |