mirror of https://github.com/dahall/Vanara.git
76 lines
3.6 KiB
C#
76 lines
3.6 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using System.Runtime.InteropServices.ComTypes;
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namespace Vanara.PInvoke;
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public static partial class Shell32
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{
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/// <summary>Indicates the format of the resulting image.</summary>
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[PInvokeData("imagetranscode.h", MSDNShortId = "NN:imagetranscode.ITranscodeImage")]
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public enum TI_FLAGS
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{
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/// <summary>Convert the image to BMP format.</summary>
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TI_BITMAP = 1,
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/// <summary>Convert the image to JPEG format.</summary>
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TI_JPEG = 2
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}
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/// <summary>Exposes a method that allows conversion to JPEG or bitmap (BMP) image formats from any image type supported by Windows.</summary>
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// https://docs.microsoft.com/en-us/windows/win32/api/imagetranscode/nn-imagetranscode-itranscodeimage
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[PInvokeData("imagetranscode.h", MSDNShortId = "NN:imagetranscode.ITranscodeImage")]
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[ComImport, Guid("BAE86DDD-DC11-421c-B7AB-CC55D1D65C44"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown), CoClass(typeof(ImageTranscode))]
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public interface ITranscodeImage
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{
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/// <summary>Converts an image to JPEG or bitmap (BMP) image format.</summary>
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/// <param name="pShellItem">
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/// <para>Type: <c>IShellItem*</c></para>
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/// <para>The Shell Item for the image to convert.</para>
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/// </param>
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/// <param name="uiMaxWidth">
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/// <para>Type: <c>UINT</c></para>
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/// <para>The requested height in pixels. Should be less than or equal to the actual height of the original image. See Remarks.</para>
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/// </param>
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/// <param name="uiMaxHeight">
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/// <para>Type: <c>UINT</c></para>
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/// <para>The requested width in pixels. Should be less than or equal to the actual width of the original image. See Remarks.</para>
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/// </param>
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/// <param name="flags">
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/// <para>Type: <c>TI_FLAGS</c></para>
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/// <para>One of the following flags.</para>
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/// <para>TI_BITMAP</para>
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/// <para>Convert the image to BMP format.</para>
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/// <para>TI_JPEG</para>
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/// <para>Convert the image to JPEG format.</para>
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/// </param>
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/// <param name="pvImage">
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/// <para>Type: <c>IStream*</c></para>
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/// <para>A stream to receive the converted image. The stream must be created by the calling code prior to calling <c>TranscodeImage</c>.</para>
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/// </param>
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/// <param name="puiWidth">
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/// <para>Type: <c>UINT*</c></para>
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/// <para>The actual width of the converted image.</para>
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/// </param>
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/// <param name="puiHeight">
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/// <para>Type: <c>UINT*</c></para>
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/// <para>The actual height of the converted image.</para>
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/// </param>
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/// <remarks>
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/// <para>
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/// The aspect ratio of the original image is preserved. The new image is resized so that it will fit into a box of width
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/// <c>uiMaxWidth</c> and height <c>uiMaxHeight</c>.
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/// </para>
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/// <para>The image size will not be changed if the original image already fits in this bounding box.</para>
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/// <para>If both uiMaxWidth and uiMaxHeight are zero, the returned image will be the same size as the original.</para>
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/// </remarks>
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// https://docs.microsoft.com/en-us/windows/win32/api/imagetranscode/nf-imagetranscode-itranscodeimage-transcodeimage HRESULT
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// TranscodeImage( [in] IShellItem *pShellItem, UINT uiMaxWidth, UINT uiMaxHeight, DWORD flags, IStream *pvImage, [out, optional]
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// UINT *puiWidth, [out, optional] UINT *puiHeight );
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void TranscodeImage([In] IShellItem pShellItem, uint uiMaxWidth, uint uiMaxHeight, TI_FLAGS flags, [In, Out] IStream pvImage, out uint puiWidth, out uint puiHeight);
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}
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/// <summary>CLSID_ImageTranscode</summary>
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[ComImport, Guid("17B75166-928F-417d-9685-64AA135565C1"), ClassInterface(ClassInterfaceType.None)]
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public class ImageTranscode { }
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} |