MythTV  master
mythbdoverlay.cpp
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1 #include <algorithm>
2 
3 // Qt
4 #include <QPainter>
5 
6 // MythTV
7 #include "Bluray/mythbdoverlay.h"
8 
9 MythBDOverlay::MythBDOverlay(const bd_overlay_s* const Overlay)
10  : m_image(Overlay->w, Overlay->h, QImage::Format_Indexed8),
11  m_x(Overlay->x),
12  m_y(Overlay->y)
13 {
14  Wipe();
15 }
16 
17 MythBDOverlay::MythBDOverlay(const bd_argb_overlay_s* const Overlay)
18  : m_image(Overlay->w, Overlay->h, QImage::Format_ARGB32),
19  m_x(Overlay->x),
20  m_y(Overlay->y)
21 {
22 }
23 
24 void MythBDOverlay::SetPalette(const BD_PG_PALETTE_ENTRY *Palette)
25 {
26  if (!Palette)
27  return;
28 
29  QVector<QRgb> rgbpalette;
30  for (int i = 0; i < 256; i++)
31  {
32  int y = Palette[i].Y;
33  int cr = Palette[i].Cr;
34  int cb = Palette[i].Cb;
35  int a = Palette[i].T;
36  int r = std::clamp(int(y + 1.4022 * (cr - 128)), 0, 0xff);
37  int b = std::clamp(int(y + 1.7710 * (cb - 128)), 0, 0xff);
38  int g = std::clamp(int(1.7047 * y - (0.1952 * b) - (0.5647 * r)), 0, 0xff);
39  rgbpalette.push_back(static_cast<uint>((a << 24) | (r << 16) | (g << 8) | b));
40  }
41  m_image.setColorTable(rgbpalette);
42 }
43 
45 {
46  Wipe(0, 0, m_image.width(), m_image.height());
47 }
48 
49 void MythBDOverlay::Wipe(int Left, int Top, int Width, int Height)
50 {
51  if (m_image.format() == QImage::Format_Indexed8)
52  {
53  uint8_t *data = m_image.bits();
54  int32_t offset = (Top * m_image.bytesPerLine()) + Left;
55  for (int i = 0; i < Height; i++ )
56  {
57  memset(&data[offset], 0xff, static_cast<size_t>(Width));
58  offset += m_image.bytesPerLine();
59  }
60  }
61  else
62  {
63  QColor transparent(0, 0, 0, 255);
64  QPainter painter(&m_image);
65  painter.setCompositionMode(QPainter::CompositionMode_Source);
66  painter.fillRect(Left, Top, Width, Height, transparent);
67  }
68 }
69 
MythBDOverlay::m_image
QImage m_image
Definition: mythbdoverlay.h:27
MythBDOverlay::SetPalette
void SetPalette(const BD_PG_PALETTE_ENTRY *Palette)
Definition: mythbdoverlay.cpp:24
MythBDOverlay::MythBDOverlay
MythBDOverlay()=default
uint
unsigned int uint
Definition: compat.h:79
mythbdoverlay.h
MythBDOverlay::Wipe
void Wipe(void)
Definition: mythbdoverlay.cpp:44