bmpwriter.hh revision 12230:48021d6b51eb 
1/*
2 * Copyright (c) 2010, 2015, 2017 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: William Wang
38 *          Ali Saidi
39 *          Chris Emmons
40 *          Andreas Sandberg
41 */
42#ifndef __BASE_BITMAP_HH__
43#define __BASE_BITMAP_HH__
44
45#include <ostream>
46
47#include "base/compiler.hh"
48#include "base/framebuffer.hh"
49#include "base/imgwriter.hh"
50
51/**
52 * @file Declaration of a class that writes a frame buffer to a bitmap
53 */
54
55// write frame buffer into a bitmap picture
56class  BmpWriter : public ImgWriter
57{
58  public:
59    /**
60     * Create a bitmap that takes data in a given mode & size and
61     * outputs to an ostream.
62     */
63    BmpWriter(const FrameBuffer *fb);
64
65    ~BmpWriter() {};
66
67    /*
68     * Return Image format as a string
69     *
70     * @return img extension (e.g. bmp for Bitmap)
71     */
72    const char* getImgExtension() const override
73    { return _imgExtension; }
74
75    /**
76     * Write the frame buffer data into the provided ostream
77     *
78     * @param bmp stream to write to
79     */
80    void write(std::ostream &bmp) const override;
81
82  private:
83    struct FileHeader {
84        unsigned char magic_number[2];
85        uint32_t size;
86        uint16_t reserved1;
87        uint16_t reserved2;
88        uint32_t offset;
89    } M5_ATTR_PACKED;
90
91    struct InfoHeaderV1 { /* Aka DIB header */
92        uint32_t Size;
93        uint32_t Width;
94        uint32_t Height;
95        uint16_t Planes;
96        uint16_t BitCount;
97        uint32_t Compression;
98        uint32_t SizeImage;
99        uint32_t XPelsPerMeter;
100        uint32_t YPelsPerMeter;
101        uint32_t ClrUsed;
102        uint32_t ClrImportant;
103    } M5_ATTR_PACKED;
104
105    struct CompleteV1Header {
106        FileHeader file;
107        InfoHeaderV1 info;
108    } M5_ATTR_PACKED;
109
110    struct BmpPixel32 {
111        BmpPixel32 &operator=(const Pixel &rhs) {
112            red = rhs.red;
113            green = rhs.green;
114            blue = rhs.blue;
115            padding = 0;
116
117            return *this;
118        }
119        uint8_t blue;
120        uint8_t green;
121        uint8_t red;
122        uint8_t padding;
123    } M5_ATTR_PACKED;
124
125    typedef BmpPixel32 PixelType;
126
127    static const char* _imgExtension;
128
129    const CompleteV1Header getCompleteHeader() const;
130};
131
132
133#endif // __BASE_BITMAP_HH__
134
135