2 * MagickBitmapSource.cpp
5 * Created by Ralf Kistner on 16/10/2009.
6 * Copyright 2008 ZXing authors All rights reserved.
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
21 #include "MagickBitmapSource.h"
25 using namespace Magick;
29 MagickBitmapSource::MagickBitmapSource(Image& image) : image_(image) {
30 width = image.columns();
31 height = image.rows();
33 pixel_cache = image.getConstPixels(0, 0, width, height);
36 MagickBitmapSource::~MagickBitmapSource() {
40 int MagickBitmapSource::getWidth() const {
44 int MagickBitmapSource::getHeight() const {
48 unsigned char* MagickBitmapSource::getRow(int y, unsigned char* row) {
49 int width = getWidth();
51 row = new unsigned char[width];
53 for (int x = 0; x < width; x++) {
54 const PixelPacket* p = pixel_cache + y * width + x;
55 // We assume 16 bit values here
56 row[x] = (unsigned char)((306 * ((int)p->red >> 8) + 601 * ((int)p->green >> 8) + 117 * ((int)p->blue >> 8)) >> 10);
62 /** This is a more efficient implementation. */
63 unsigned char* MagickBitmapSource::getMatrix() {
64 int width = getWidth();
65 int height = getHeight();
66 unsigned char* matrix = new unsigned char[width*height];
67 unsigned char* m = matrix;
68 const Magick::PixelPacket* p = pixel_cache;
69 for (int y = 0; y < height; y++) {
70 for (int x = 0; x < width; x++) {
71 *m = (unsigned char)((306 * ((int)p->red >> 8) + 601 * ((int)p->green >> 8) + 117 * ((int)p->blue >> 8)) >> 10);