ExcStatus ReadHeader(
ImageColorSpec& colorSpec,
ImageSamplingGeometry& geometry)
{
int i;
Point origin;
RectSize size;
Rect refgrid;
JERRCODE jerr;
jerr = CJPEGDecoder::ReadHeader(&m_size.width, &m_size.height, &m_nchannels, &m_color, &m_sampling, &m_precision);
if(JPEG_OK != jerr)
return ExcStatusFail;
origin.SetX(0);
origin.SetY(0);
size.SetWidth(m_size.width);
size.SetHeight(m_size.height);
refgrid.SetOrigin(origin);
refgrid.SetSize(size);
geometry.SetRefGridRect(refgrid);
geometry.ReAlloc(m_nchannels);
geometry.SetEnumSampling(j2u_smap[m_sampling]);
colorSpec.ReAlloc(m_nchannels);
colorSpec.SetColorSpecMethod(UIC::Enumerated);
colorSpec.SetComponentToColorMap(UIC::Direct);
colorSpec.SetEnumColorSpace(j2u_cmap[m_color]);
if(m_precision <= 8)
{
for(i = 0; i < m_nchannels; i++)
colorSpec.DataRange()[i].SetAsRange8u((1 << m_precision) - 1);
}
else
{
for(i = 0; i < m_nchannels; i++)
colorSpec.DataRange()[i].SetAsRange16u((1 << m_precision) - 1);
}
return ExcStatusOk;
}
IM_ERROR SaveImageBMP(
CIppImage& image,
PARAMS_BMP&,
BaseStreamOutput& out)
{
int i;
int nOfComponents;
Image imageCn;
Rect refgrid;
Point origin;
RectSize size;
ImageDataPtr dataPtr;
ImageColorSpec colorSpec;
ImageDataOrder dataOrder;
ImageSamplingGeometry geometry;
BMPEncoder encoder;
if(ExcStatusOk != encoder.Init())
return IE_INIT;
if(ExcStatusOk != encoder.AttachStream(out))
return IE_ASTREAM;
nOfComponents = image.NChannels();
dataOrder.SetDataType(T8u);
size.SetWidth(image.Width());
size.SetHeight(image.Height());
origin.SetX(0);
origin.SetY(0);
refgrid.SetOrigin(origin);
refgrid.SetSize(size);
geometry.SetRefGridRect(refgrid);
geometry.ReAlloc(nOfComponents);
geometry.SetEnumSampling(S444);
dataOrder.ReAlloc(Interleaved, nOfComponents);
dataOrder.PixelStep()[0] = nOfComponents;
dataOrder.LineStep() [0] = image.Step();
imageCn.ColorSpec().ReAlloc(nOfComponents);
imageCn.ColorSpec().SetColorSpecMethod(Enumerated);
imageCn.ColorSpec().SetComponentToColorMap(Direct);
for(i = 0; i < nOfComponents; i++)
imageCn.ColorSpec().DataRange()[i].SetAsRange8u(255);
switch(image.NChannels())
{
case 1: imageCn.ColorSpec().SetEnumColorSpace(Grayscale); break;
case 3: imageCn.ColorSpec().SetEnumColorSpace(BGR); break;
case 4: imageCn.ColorSpec().SetEnumColorSpace(BGRA); break;
default:
break;
}
int dstOrder_c3[3] = {2, 1, 0};
int dstOrder_c4[4] = {2, 1, 0, 3};
if(image.NChannels() == 3 && image.Color() == IC_RGB)
{
image.SwapChannels(dstOrder_c3);
image.Color((IM_COLOR)IC_BGR);
}
else if(image.NChannels() == 4 && image.Color() == IC_RGBA)
{
image.SwapChannels(dstOrder_c4);
image.Color((IM_COLOR)IC_BGRA);
}
dataPtr.p8u = image;
imageCn.Buffer().Attach(&dataPtr,dataOrder,geometry);
if(ExcStatusOk != encoder.AttachImage(imageCn))
return IE_AIMAGE;
if(ExcStatusOk != encoder.WriteHeader())
return IE_WHEADER;
if(ExcStatusOk != encoder.WriteData())
return IE_WDATA;
return IE_OK;
} // SaveImageBMP()