double DurationInterface::GetAlignmentDuration( int num, int numbase )
{
int note_dur = this->GetDurGes() != DURATION_NONE ? this->GetDurGes() : this->GetActualDur();
if (this->HasNum()) num *=this->GetNum();
if (this->HasNumbase()) numbase *=this->GetNumbase();
double duration = DUR_MAX / pow (2.0, (double)(note_dur - 2.0)) * numbase / num;
if ( GetDots() > 0 ) {
duration = 2 * duration - (duration / pow(2, GetDots()));
}
//LogDebug("Duration %d; Dot %d; Alignement %f", note_dur, GetDots(), duration );
return duration;
}
void BMPEncoder::Start(Size size)
{
BMPHeader header;
Zero(header);
header.biSize = sizeof(BMP_INFOHEADER);
header.biWidth = size.cx;
header.biHeight = size.cy;
header.biBitCount = bpp;
header.biPlanes = 1;
header.biCompression = 0;
int ncolors = 0;
switch(bpp) {
case 1: format.Set1mf(); ncolors = 2; break;
case 4: format.Set4mf(); ncolors = 16; break;
case 8: format.Set8(); ncolors = 256; break;
case 16: format.Set16le(0xf800, 0x07E0, 0x001f); break;
case 32: format.Set32le(0xff0000, 0x00ff00, 0x0000ff); break;
default: format.Set24le(0xff0000, 0x00ff00, 0x0000ff); break;
}
if(ncolors) {
if(grayscale)
for(int i = 0; i < ncolors; i++) {
BMP_RGB& p = header.palette[i];
p.rgbRed = p.rgbGreen = p.rgbBlue = 255 * i / (ncolors - 1);
}
else {
const RGBA *palette = GetPalette();
for(int i = 0; i < ncolors; i++) {
BMP_RGB& p = header.palette[i];
p.rgbRed = palette[i].r;
p.rgbGreen = palette[i].g;
p.rgbBlue = palette[i].b;
}
}
}
if(bpp == 16) {
dword *bitfields = reinterpret_cast<dword *>(header.palette);
bitfields[2] = 0x001f;
bitfields[1] = 0x07E0;
bitfields[0] = 0xf800;
header.biCompression = 3/* BI_BITFIELDS */;
ncolors = 3;
}
row_bytes = (format.GetByteCount(size.cx) + 3) & ~3;
scanline.Alloc(row_bytes);
header.biSizeImage = size.cy * row_bytes;
Size dots = GetDots();
if(dots.cx && dots.cy) {
header.biXPelsPerMeter = fround(header.biWidth * (1000.0 / 25.4 * 600.0) / dots.cx);
header.biYPelsPerMeter = fround(header.biHeight * (1000.0 / 25.4 * 600.0) / dots.cy);
}
BMP_FILEHEADER bmfh;
Zero(bmfh);
bmfh.bfType = 'B' + 256 * 'M';
bmfh.bfOffBits = sizeof(bmfh) + sizeof(BMP_INFOHEADER) + sizeof(BMP_RGB) * ncolors;
bmfh.bfSize = sizeof(bmfh) + sizeof(BMP_INFOHEADER) + ncolors + header.biSizeImage;
bmfh.SwapEndian();
GetStream().Put(&bmfh, sizeof(bmfh));
header.SwapEndian();
int h = sizeof(BMP_INFOHEADER) + sizeof(BMP_RGB) * ncolors;
GetStream().Put(&header, h);
soff = GetStream().GetPos();
GetStream().SetSize(sizeof(bmfh) + h + size.cy * row_bytes);
linei = size.cy;
linebytes = format.GetByteCount(size.cx);
}
