示例#1
0
        // Return the lowest supported bitmap that is at least the target bitmap
        private TwainResolution FindBestResolution(TwainResolution[] resolutions, int targetResolution)
        {
            float diff = int.MaxValue;

            TwainResolution selectedResolution = null;

            foreach (TwainResolution resolution in resolutions)
            {
                if (resolution.X >= targetResolution && (resolution.X - targetResolution) < diff)
                {
                    diff = resolution.X - targetResolution;
                    selectedResolution = resolution;
                }
            }


            return(selectedResolution);
        }
示例#2
0
        private void ScanDocument()
        {
            this.Cursor = Cursors.WaitCursor;

            if (device.TryOpen())
            {
                try
                {
                    DocumentType docType = ((myDocType)getCheckedMenuItem(miDocumentType).Tag).DocType;

                    DeviceCapability[] capabilities = device.GetSupportedCapabilities();
                    foreach (DeviceCapability capability in capabilities)
                    {
                        switch (capability)
                        {
                        case DeviceCapability.ICAP_PIXELTYPE:

                            if (docType.PreferredColorDepth != Arena.Enums.ColorDepth.Undefined)
                            {
                                ImagePixelType[] pixelTypes = device.GetSupportedPixelTypes();

                                switch (docType.PreferredColorDepth)
                                {
                                case Arena.Enums.ColorDepth.Color_4_bit:
                                case Arena.Enums.ColorDepth.Color_8_bit:
                                case Arena.Enums.ColorDepth.Color_24_bit:
                                case Arena.Enums.ColorDepth.Color_32_bit:
                                case Arena.Enums.ColorDepth.Color_48_bit:

                                    foreach (ImagePixelType pixelType in pixelTypes)
                                    {
                                        if (pixelType == ImagePixelType.Color)
                                        {
                                            device.PixelType = pixelType;
                                            break;
                                        }
                                    }
                                    break;

                                case Arena.Enums.ColorDepth.Grayscale_8_bit:
                                case Arena.Enums.ColorDepth.Grayscale_10_bit:
                                case Arena.Enums.ColorDepth.Grayscale_24_bit:

                                    foreach (ImagePixelType pixelType in pixelTypes)
                                    {
                                        if (pixelType == ImagePixelType.Grayscale)
                                        {
                                            device.PixelType = pixelType;
                                            break;
                                        }
                                    }
                                    break;

                                case Arena.Enums.ColorDepth.Black_White:

                                    foreach (ImagePixelType pixelType in pixelTypes)
                                    {
                                        if (pixelType == ImagePixelType.BlackAndWhite)
                                        {
                                            device.PixelType = pixelType;
                                            break;
                                        }
                                    }
                                    break;
                                }
                            }

                            break;

                        case DeviceCapability.ICAP_BITDEPTH:

                            if (docType.PreferredColorDepth != Arena.Enums.ColorDepth.Undefined)
                            {
                                int[] bitDepths         = device.GetSupportedBitDepths();
                                int   selectedBithDepth = 0;

                                switch (docType.PreferredColorDepth)
                                {
                                case Arena.Enums.ColorDepth.Black_White:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 1);
                                    break;

                                case Arena.Enums.ColorDepth.Color_4_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 4);
                                    break;

                                case Arena.Enums.ColorDepth.Color_8_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 8);
                                    break;

                                case Arena.Enums.ColorDepth.Color_24_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 24);
                                    break;

                                case Arena.Enums.ColorDepth.Color_32_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 32);
                                    break;

                                case Arena.Enums.ColorDepth.Color_48_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 48);
                                    break;

                                case Arena.Enums.ColorDepth.Grayscale_8_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 8);
                                    break;

                                case Arena.Enums.ColorDepth.Grayscale_10_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 10);
                                    break;

                                case Arena.Enums.ColorDepth.Grayscale_24_bit:
                                    selectedBithDepth = FindBestBitDepth(bitDepths, 24);
                                    break;
                                }

                                if (selectedBithDepth > 0)
                                {
                                    device.BitDepth = selectedBithDepth;
                                }
                            }

                            break;

                        case DeviceCapability.ICAP_XRESOLUTION:

                            if (docType.PreferredResolution != Resolution.Undefined)
                            {
                                TwainResolution[] resolutions        = device.GetSupportedResolutions();
                                TwainResolution   selectedResolution = null;

                                switch (docType.PreferredResolution)
                                {
                                case Resolution.DPI_72:
                                    selectedResolution = FindBestResolution(resolutions, 72);
                                    break;

                                case Resolution.DPI_150:
                                    selectedResolution = FindBestResolution(resolutions, 150);
                                    break;

                                case Resolution.DPI_300:
                                    selectedResolution = FindBestResolution(resolutions, 300);
                                    break;

                                case Resolution.DPI_600:
                                    selectedResolution = FindBestResolution(resolutions, 600);
                                    break;
                                }

                                if (selectedResolution != null)
                                {
                                    device.Resolution = selectedResolution;
                                }
                            }

                            break;
                        }
                    }

                    switch (getCheckedMenuItemIndex(miPageSize))
                    {
                    case 0:
                        device.FrameSize = StaticFrameSizeType.LetterUS;
                        break;

                    case 1:
                        device.FrameSize = StaticFrameSizeType.LegalUS;
                        break;

                    case 2:
                        device.FrameSize = StaticFrameSizeType.USStatement;
                        break;
                    }

                    device.AutomaticDeskew = true;
                    device.AutoScan        = true;

                    device.HideInterface            = true;
                    device.DisplayProgressIndicator = false;
                    device.Acquire();
                }
                catch (Exception ex)
                {
                    this.Cursor = Cursors.Default;
                    device.Close();
                    MessageBox.Show(ex.Message, "Exception", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }

            this.Cursor = Cursors.Default;
        }