gem5  v21.1.0.2
pixel.cc
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37 
38 #include "base/pixel.hh"
39 
40 #include <cassert>
41 
42 #include "base/bitfield.hh"
43 
44 namespace gem5
45 {
46 
47 const PixelConverter PixelConverter::rgba8888_le(4, 0, 8, 16, 8, 8, 8);
48 const PixelConverter PixelConverter::rgba8888_be(4, 0, 8, 16, 8, 8, 8,
49  ByteOrder::big);
50 const PixelConverter PixelConverter::rgb565_le(2, 0, 5, 11, 5, 6, 5);
51 const PixelConverter PixelConverter::rgb565_be(2, 0, 5, 11, 5, 6, 5,
52  ByteOrder::big);
53 
55  unsigned ro, unsigned go, unsigned bo,
56  unsigned rw, unsigned gw, unsigned bw,
57  ByteOrder _byte_order)
58  : length(_length),
59  depth(rw + gw + bw),
60  byte_order(_byte_order),
61  ch_r(ro, rw),
62  ch_g(go, gw),
63  ch_b(bo, bw)
64 {
65  assert(length > 1);
66 }
67 
68 PixelConverter::Channel::Channel(unsigned _offset, unsigned width)
69  : offset(_offset),
70  mask(gem5::mask(width)),
71  factor(255.0 / mask)
72 {
73 }
74 
75 uint32_t
76 PixelConverter::readWord(const uint8_t *p) const
77 {
78  uint32_t word(0);
79 
80  if (byte_order == ByteOrder::little) {
81  for (int i = 0; i < length; ++i)
82  word |= p[i] << (8 * i);
83  } else {
84  for (int i = 0; i < length; ++i)
85  word |= p[i] << (8 * (length - i - 1));
86  }
87 
88  return word;
89 }
90 
91 void
92 PixelConverter::writeWord(uint8_t *p, uint32_t word) const
93 {
94  if (byte_order == ByteOrder::little) {
95  for (int i = 0; i < length; ++i)
96  p[i] = (word >> (8 * i)) & 0xFF;
97  } else {
98  for (int i = 0; i < length; ++i)
99  p[i] = (word >> (8 * (length - i - 1))) & 0xFF;
100  }
101 }
102 
103 } // namespace gem5
sc_dt::word
unsigned int word
Definition: scfx_mant.hh:96
gem5::PixelConverter::rgba8888_be
static const PixelConverter rgba8888_be
Predefined 32-bit RGB (red in least significant bits, 8 bits/channel, big endian) conversion helper.
Definition: pixel.hh:210
gem5::ArmISA::i
Bitfield< 7 > i
Definition: misc_types.hh:66
gem5::mask
constexpr uint64_t mask(unsigned nbits)
Generate a 64-bit mask of 'nbits' 1s, right justified.
Definition: bitfield.hh:63
gem5::PixelConverter::rgb565_be
static const PixelConverter rgb565_be
Predefined 16-bit RGB565 (red in least significant bits, big endian) conversion helper.
Definition: pixel.hh:213
gem5::PixelConverter::length
unsigned length
Bytes per pixel when stored in memory (including padding)
Definition: pixel.hh:184
bitfield.hh
gem5::PixelConverter::rgb565_le
static const PixelConverter rgb565_le
Predefined 16-bit RGB565 (red in least significant bits, little endian) conversion helper.
Definition: pixel.hh:206
gem5::ArmISA::width
Bitfield< 4 > width
Definition: misc_types.hh:71
gem5::PixelConverter::byte_order
ByteOrder byte_order
Byte order when stored to memory.
Definition: pixel.hh:192
gem5::PowerISA::bo
Bitfield< 25, 21 > bo
Definition: types.hh:82
gem5::MipsISA::p
Bitfield< 0 > p
Definition: pra_constants.hh:326
gem5::ArmISA::offset
Bitfield< 23, 0 > offset
Definition: types.hh:144
pixel.hh
gem5::PixelConverter::Channel::Channel
Channel(unsigned offset, unsigned width)
Definition: pixel.cc:68
gem5::PixelConverter::PixelConverter
PixelConverter(unsigned length, unsigned ro, unsigned go, unsigned bo, unsigned rw, unsigned gw, unsigned bw, ByteOrder byte_order=ByteOrder::little)
Definition: pixel.cc:54
gem5::PixelConverter::writeWord
void writeWord(uint8_t *p, uint32_t word) const
Write a word of a given length and endianness to memory.
Definition: pixel.cc:92
gem5::ArmISA::rw
Bitfield< 31 > rw
Definition: misc_types.hh:252
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::PixelConverter::readWord
uint32_t readWord(const uint8_t *p) const
Read a word of a given length and endianness from memory.
Definition: pixel.cc:76
gem5::PixelConverter::rgba8888_le
static const PixelConverter rgba8888_le
Predefined 32-bit RGB (red in least significant bits, 8 bits/channel, little endian) conversion helpe...
Definition: pixel.hh:203

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