gem5  v21.1.0.2
bmpwriter.cc
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37 
38 #include "base/bmpwriter.hh"
39 
40 #include <cassert>
41 
42 #include "base/logging.hh"
43 
44 namespace gem5
45 {
46 
47 const char* BmpWriter::_imgExtension = "bmp";
48 
49 // bitmap class ctor
51  : ImgWriter(_fb)
52 {
53 }
54 
57 {
58  const uint32_t pixel_array_size(sizeof(PixelType) * fb.area());
59  const uint32_t file_size(sizeof(CompleteV1Header) + pixel_array_size);
60 
61  const CompleteV1Header header = {
62  // File header
63  {
64  {'B','M'}, /* Magic */
65  file_size,
66  0, 0, /* Reserved */
67  sizeof(CompleteV1Header) /* Offset to pixel array */
68  },
69  // Info/DIB header
70  {
71  sizeof(InfoHeaderV1),
72  fb.width(),
73  fb.height(),
74  1, /* Color planes */
75  32, /* Bits per pixel */
76  0, /* No compression */
77  pixel_array_size, /* Image size in bytes */
78  2835, /* x pixels per meter (assume 72 DPI) */
79  2835, /* y pixels per meter (assume 72 DPI) */
80  0, /* Colors in color table */
81  0 /* Important color count (0 == all are important) */
82  }
83  };
84 
85  return header;
86 }
87 
88 void
89 BmpWriter::write(std::ostream &bmp) const
90 {
92 
93  // 1. write the header
94  bmp.write(reinterpret_cast<const char *>(&header), sizeof(header));
95 
96  // 2. write the bitmap data
97  // BMP start store data left to right starting with the bottom row
98  // so we need to do some creative flipping
99  std::vector<PixelType> line_buffer(fb.width());
100  for (int y = 0; y < fb.height(); ++y) {
101  for (unsigned x = 0; x < fb.width(); ++x)
102  line_buffer[x] = fb.pixel(x, fb.height() - y - 1);
103 
104  bmp.write(reinterpret_cast<const char *>(line_buffer.data()),
105  line_buffer.size() * sizeof(line_buffer[0]));
106  }
107 
108  bmp.flush();
109 }
110 
111 } // namespace gem5
gem5::BmpWriter::write
void write(std::ostream &bmp) const override
Write the frame buffer data into the provided ostream.
Definition: bmpwriter.cc:89
gem5::BmpWriter::getCompleteHeader
const CompleteV1Header getCompleteHeader() const
Definition: bmpwriter.cc:56
gem5::FrameBuffer
Internal gem5 representation of a frame buffer.
Definition: framebuffer.hh:68
gem5::FrameBuffer::area
unsigned area() const
Total number of pixels in frame buffer.
Definition: framebuffer.hh:103
gem5::FrameBuffer::width
unsigned width() const
Frame buffer width in pixels.
Definition: framebuffer.hh:99
header
output header
Definition: nop.cc:36
std::vector
STL vector class.
Definition: stl.hh:37
gem5::BmpWriter::_imgExtension
static const char * _imgExtension
Definition: bmpwriter.hh:130
gem5::FrameBuffer::height
unsigned height() const
Frame buffer height in pixels.
Definition: framebuffer.hh:101
gem5::ImgWriter
Definition: imgwriter.hh:52
gem5::FrameBuffer::pixel
const Pixel & pixel(unsigned x, unsigned y) const
Get a pixel from an (x, y) coordinate.
Definition: framebuffer.hh:160
gem5::BmpWriter::InfoHeaderV1
Definition: bmpwriter.hh:90
gem5::RiscvISA::x
Bitfield< 3 > x
Definition: pagetable.hh:73
bmpwriter.hh
gem5::BmpWriter::CompleteV1Header
Definition: bmpwriter.hh:106
logging.hh
gem5::BmpWriter::BmpWriter
BmpWriter(const FrameBuffer *fb)
Create a bitmap that takes data in a given mode & size and outputs to an ostream.
Definition: bmpwriter.cc:50
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::ImgWriter::fb
const FrameBuffer & fb
Definition: imgwriter.hh:74
gem5::BmpWriter::BmpPixel32
Definition: bmpwriter.hh:112

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