ExcStatus SetParams( const ImageColorSpec& colorSpec, const ImageSamplingGeometry& geometry) { ImageEnumSampling m_enumSampling; m_enumSampling = geometry.EnumSampling(); if(JC_YCBCR == m_color && JC_GRAY == u2j_cmap[colorSpec.EnumColorSpace()]) m_nchannels = 1; m_color = u2j_cmap[colorSpec.EnumColorSpace()]; m_sampling = u2j_smap[m_enumSampling]; m_precision = colorSpec.DataRange()[0].BitDepth() + 1; m_size.width = geometry.RefGridRect().Width(); m_size.height = geometry.RefGridRect().Height(); return ExcStatusOk; } // JPEGDecoder::SetParams()
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 ReadImageBMP( BaseStreamInput& in, PARAMS_BMP&, CIppImage& image) { int i; Image imageCn; IppiSize roi; ImageDataPtr dataPtr; ImageDataOrder dataOrder; ImageColorSpec colorSpec; ImageSamplingGeometry geometry; BMPDecoder decoder; if(ExcStatusOk != decoder.Init()) return IE_INIT; if(ExcStatusOk != decoder.AttachStream(in)) return IE_ASTREAM; if(ExcStatusOk != decoder.ReadHeader(colorSpec,geometry)) return IE_RHEADER; int nOfComponents = geometry.NOfComponents(); dataOrder.SetDataType(T8u); dataOrder.ReAlloc(Interleaved, nOfComponents); dataOrder.PixelStep()[0] = nOfComponents; dataOrder.LineStep() [0] = geometry.RefGridRect().Width() * nOfComponents + BYTES_PAD(geometry.RefGridRect().Width(), nOfComponents, 1); imageCn.ColorSpec().ReAlloc(nOfComponents); imageCn.ColorSpec().SetColorSpecMethod(Enumerated); imageCn.ColorSpec().SetComponentToColorMap(Direct); for(i = 0; i < nOfComponents; i++) imageCn.ColorSpec().DataRange()[i].SetAsRange8u(255); ImageEnumColorSpace in_color; ImageEnumColorSpace out_color; in_color = colorSpec.EnumColorSpace(); out_color = in_color; imageCn.ColorSpec().SetEnumColorSpace(out_color); image.Color((IM_COLOR)image.UicToIppColor(out_color)); roi.width = geometry.RefGridRect().Width(); roi.height = geometry.RefGridRect().Height(); if(0 != image.Alloc(roi,nOfComponents,8,1)) return IE_ALLOC; dataPtr.p8u = image; imageCn.Buffer().Attach(&dataPtr,dataOrder,geometry); if(ExcStatusOk != decoder.ReadData(imageCn.Buffer().DataPtr(),dataOrder)) return IE_RDATA; return IE_OK; } // ReadImageBMP()