OpenXML - PowerPoint - 图片比例高度和宽度缩放

Question

我正在尝试使用OpenXML SDK找到或计算PPTX文件中演示文稿图片的比例高度和宽度值。

我已经获得了图片，其为

Picture = DocumentFormat.OpenXml.Presentation.Picture

我已经查看了ShapeProperties和NonVisualPictureProperties，但是无法找到这些值。

这就是我在PowerPoint中尝试以编程方式获取的内容：

请问有人能告诉我这些值藏在哪里吗？

谢谢。

- Trevor Daniel

Answer 1

请查看 DocumentFormat.OpenXml.Drawing 下的 ShapeProperties.Transform2D.Extents (Extent文档)。这是一个绝对大小，而不是百分比，在 OpenXML EMU 中表示（1英寸 = 914400 EMUs，1厘米 = 360000 EMU）。据我所知，这就是设置图像缩放的方式（绝对大小，而非百分比）。

使用 OpenXML SDK 工具反射代码进行示例：新建电子表格，插入图像并保存。然后在 openxml sdk->reflect code 中，使用 ctrl+f 查找“Transform2D”，即可得到所需的内容。例如：

using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Presentation;
using DocumentFormat.OpenXml;
using A = DocumentFormat.OpenXml.Drawing;
using P14 = DocumentFormat.OpenXml.Office2010.PowerPoint;
using P15 = DocumentFormat.OpenXml.Office2013.PowerPoint;
using A14 = DocumentFormat.OpenXml.Office2010.Drawing;
using Thm15 = DocumentFormat.OpenXml.Office2013.Theme;
using Ap = DocumentFormat.OpenXml.ExtendedProperties;
using Vt = DocumentFormat.OpenXml.VariantTypes;

// Generates content of slidePart1.
private void GenerateSlidePart1Content(SlidePart slidePart1)
{
    Slide slide1 = new Slide();
    slide1.AddNamespaceDeclaration("a", "http://schemas.openxmlformats.org/drawingml/2006/main");
    slide1.AddNamespaceDeclaration("r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships");
    slide1.AddNamespaceDeclaration("p", "http://schemas.openxmlformats.org/presentationml/2006/main");

    CommonSlideData commonSlideData1 = new CommonSlideData();

    ShapeTree shapeTree1 = new ShapeTree();

    NonVisualGroupShapeProperties nonVisualGroupShapeProperties1 = new NonVisualGroupShapeProperties();
    NonVisualDrawingProperties nonVisualDrawingProperties1 = new NonVisualDrawingProperties(){ Id = (UInt32Value)1U, Name = "" };
    NonVisualGroupShapeDrawingProperties nonVisualGroupShapeDrawingProperties1 = new NonVisualGroupShapeDrawingProperties();
    ApplicationNonVisualDrawingProperties applicationNonVisualDrawingProperties1 = new ApplicationNonVisualDrawingProperties();

    nonVisualGroupShapeProperties1.Append(nonVisualDrawingProperties1);
    nonVisualGroupShapeProperties1.Append(nonVisualGroupShapeDrawingProperties1);
    nonVisualGroupShapeProperties1.Append(applicationNonVisualDrawingProperties1);

    GroupShapeProperties groupShapeProperties1 = new GroupShapeProperties();

    A.TransformGroup transformGroup1 = new A.TransformGroup();
    A.Offset offset1 = new A.Offset(){ X = 0L, Y = 0L };
    A.Extents extents1 = new A.Extents(){ Cx = 0L, Cy = 0L };
    A.ChildOffset childOffset1 = new A.ChildOffset(){ X = 0L, Y = 0L };
    A.ChildExtents childExtents1 = new A.ChildExtents(){ Cx = 0L, Cy = 0L };

    transformGroup1.Append(offset1);
    transformGroup1.Append(extents1);
    transformGroup1.Append(childOffset1);
    transformGroup1.Append(childExtents1);

    groupShapeProperties1.Append(transformGroup1);

    Picture picture1 = new Picture();

    NonVisualPictureProperties nonVisualPictureProperties1 = new NonVisualPictureProperties();
    NonVisualDrawingProperties nonVisualDrawingProperties2 = new NonVisualDrawingProperties(){ Id = (UInt32Value)4U, Name = "Picture 3" };

    NonVisualPictureDrawingProperties nonVisualPictureDrawingProperties1 = new NonVisualPictureDrawingProperties();
    A.PictureLocks pictureLocks1 = new A.PictureLocks(){ NoChangeAspect = true };

    nonVisualPictureDrawingProperties1.Append(pictureLocks1);
    ApplicationNonVisualDrawingProperties applicationNonVisualDrawingProperties2 = new ApplicationNonVisualDrawingProperties();

    nonVisualPictureProperties1.Append(nonVisualDrawingProperties2);
    nonVisualPictureProperties1.Append(nonVisualPictureDrawingProperties1);
    nonVisualPictureProperties1.Append(applicationNonVisualDrawingProperties2);

    BlipFill blipFill1 = new BlipFill();

    A.Blip blip1 = new A.Blip(){ Embed = "rId2" };

    A.BlipExtensionList blipExtensionList1 = new A.BlipExtensionList();

    A.BlipExtension blipExtension1 = new A.BlipExtension(){ Uri = "{28A0092B-C50C-407E-A947-70E740481C1C}" };

    A14.UseLocalDpi useLocalDpi1 = new A14.UseLocalDpi(){ Val = false };
    useLocalDpi1.AddNamespaceDeclaration("a14", "http://schemas.microsoft.com/office/drawing/2010/main");

    blipExtension1.Append(useLocalDpi1);

    blipExtensionList1.Append(blipExtension1);

    blip1.Append(blipExtensionList1);

    A.Stretch stretch1 = new A.Stretch();
    A.FillRectangle fillRectangle1 = new A.FillRectangle();

    stretch1.Append(fillRectangle1);

    blipFill1.Append(blip1);
    blipFill1.Append(stretch1);

    ShapeProperties shapeProperties1 = new ShapeProperties();

    A.Transform2D transform2D1 = new A.Transform2D();
    A.Offset offset2 = new A.Offset(){ X = 1524000L, Y = 0L };
    A.Extents extents2 = new A.Extents(){ Cx = 9144000L, Cy = 6858000L };

    transform2D1.Append(offset2);
    transform2D1.Append(extents2);

    A.PresetGeometry presetGeometry1 = new A.PresetGeometry(){ Preset = A.ShapeTypeValues.Rectangle };
    A.AdjustValueList adjustValueList1 = new A.AdjustValueList();

    presetGeometry1.Append(adjustValueList1);

    shapeProperties1.Append(transform2D1);
    shapeProperties1.Append(presetGeometry1);

    picture1.Append(nonVisualPictureProperties1);
    picture1.Append(blipFill1);
    picture1.Append(shapeProperties1);

    shapeTree1.Append(nonVisualGroupShapeProperties1);
    shapeTree1.Append(groupShapeProperties1);
    shapeTree1.Append(picture1);

    CommonSlideDataExtensionList commonSlideDataExtensionList1 = new CommonSlideDataExtensionList();

    CommonSlideDataExtension commonSlideDataExtension1 = new CommonSlideDataExtension(){ Uri = "{BB962C8B-B14F-4D97-AF65-F5344CB8AC3E}" };

    P14.CreationId creationId1 = new P14.CreationId(){ Val = (UInt32Value)568547621U };
    creationId1.AddNamespaceDeclaration("p14", "http://schemas.microsoft.com/office/powerpoint/2010/main");

    commonSlideDataExtension1.Append(creationId1);

    commonSlideDataExtensionList1.Append(commonSlideDataExtension1);

    commonSlideData1.Append(shapeTree1);
    commonSlideData1.Append(commonSlideDataExtensionList1);

    ColorMapOverride colorMapOverride1 = new ColorMapOverride();
    A.MasterColorMapping masterColorMapping1 = new A.MasterColorMapping();

    colorMapOverride1.Append(masterColorMapping1);

    slide1.Append(commonSlideData1);
    slide1.Append(colorMapOverride1);

    slidePart1.Slide = slide1;
}

- BurnsBA