现代 API
Contents
[
Hide
]
介绍
历史上,Aspose Slides 依赖于 java.awt,并在公共 API 中包含以下类:
从版本 24.4 开始,这个公共 API 被声明为已弃用。
为了摆脱对这些类的依赖,我们添加了所谓的“现代 API”——即应该使用的 API,而不是已弃用的 API,其签名包含对 BufferedImage 的依赖。Graphics2D 被声明为已弃用,并从公共 Slides API 中移除其支持。
带有对 System.Drawing 依赖的已弃用公共 API 的移除将在版本 24.8 中完成。
现代 API
公共 API 中添加了以下类和枚举:
- IImage - 表示光栅或矢量图像。
- ImageFormat - 表示图像的文件格式。
- Images - 用于实例化和处理 IImage 接口的方法。
请注意 IImage 是可处理的(它实现了 IDisposable 接口,其使用应该被包装在 using 中或以其他方便的方式处理)。
使用新 API 的典型场景可能如下所示:
Presentation pres = new Presentation();
try {
IPPImage ppImage;
// 从磁盘上的文件实例化 IImage 的可处理实例。
IImage image = Images.fromFile("image.png");
try {
// 通过将 IImage 的实例添加到演示文稿的图像来创建 PowerPoint 图像。
ppImage = pres.getImages().addImage(image);
} finally {
if (image != null) image.dispose();
}
// 在幻灯片 #1 上添加图片形状
pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
// 获取表示幻灯片 #1 的 IImage 实例。
IImage slideImage = pres.getSlides().get_Item(0).getImage(new Dimension(1920, 1080));
try {
// 在磁盘上保存图像。
slideImage.save("slide1.jpeg", ImageFormat.Jpeg);
} finally {
if (slideImage != null) slideImage.dispose();
}
} finally {
if (pres != null) pres.dispose();
}
用现代 API 替换旧代码
一般来说,您需要用新方法替换对旧方法的调用,旧方法使用 ImageIO。
旧:
BufferedImage slideImage = pres.getSlides().get_Item(0).getThumbnail(new Dimension(1920, 1080));
try {
ImageIO.write(slideImage, "PNG", new File("image.png"));
} catch (IOException e) {
e.printStackTrace();
}
新:
IImage slideImage = pres.getSlides().get_Item(0).getImage(new Dimension(1920, 1080));
try {
slideImage.save("image.png", ImageFormat.Png);
} finally {
if (slideImage != null) slideImage.dispose();
}
获取幻灯片缩略图
使用已弃用 API 的代码:
Presentation pres = new Presentation("pres.pptx");
try {
BufferedImage slideImage = pres.getSlides().get_Item(0).getThumbnail();
try {
ImageIO.write(slideImage, "PNG", new File("slide1.png"));
} catch (IOException e) {
e.printStackTrace();
}
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation("pres.pptx");
try {
IImage slideImage = pres.getSlides().get_Item(0).getImage();
try {
slideImage.save("slide1.png", ImageFormat.Png);
} finally {
if (slideImage != null) slideImage.dispose();
}
} finally {
if (pres != null) pres.dispose();
}
获取形状缩略图
使用已弃用 API 的代码:
Presentation pres = new Presentation("pres.pptx");
try {
BufferedImage shapeImage = pres.getSlides().get_Item(0).getShapes().get_Item(0).getThumbnail();
try {
ImageIO.write(shapeImage, "PNG", new File("shape.png"));
} catch (IOException e) {
e.printStackTrace();
}
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation("pres.pptx");
try {
IImage shapeImage = pres.getSlides().get_Item(0).getShapes().get_Item(0).getImage();
try {
shapeImage.save("shape.png");
} finally {
if (shapeImage != null) shapeImage.dispose();
}
} finally {
if (pres != null) pres.dispose();
}
获取演示文稿缩略图
使用已弃用 API 的代码:
Presentation pres = new Presentation("pres.pptx");
try {
BufferedImage[] bitmaps = pres.getThumbnails(new RenderingOptions(), new Dimension(1980, 1028));
for (int index = 0; index < bitmaps.length; index++)
{
try
{
BufferedImage thumbnail = bitmaps[index];
ImageIO.write(thumbnail, "PNG", new File("slide" + index + ".png"));
}
catch (IOException e)
{
e.printStackTrace();
}
}
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation("pres.pptx");
try {
IImage[] images = pres.getImages(new RenderingOptions(), new Dimension(1980, 1028));
try
{
for (int index = 0; index < images.length; index++)
{
IImage thumbnail = images[index];
thumbnail.save("slide" + index + ".png", ImageFormat.Png);
}
}
finally
{
for (IImage image : images)
{
image.dispose();
}
}
} finally {
if (pres != null) pres.dispose();
}
向演示文稿添加图片
使用已弃用 API 的代码:
Presentation pres = new Presentation();
try {
IPPImage ppImage = null;
try {
BufferedImage bufferedImages = ImageIO.read(new File("image.png"));
ppImage = pres.getImages().addImage(bufferedImages);
} catch (IOException e) {
e.printStackTrace();
}
pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation();
try {
IPPImage ppImage;
IImage image = Images.fromFile("image.png");
try {
ppImage = pres.getImages().addImage(image);
} finally {
if (image != null) image.dispose();
}
pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
} finally {
if (pres != null) pres.dispose();
}
将要删除的方法及其在现代 API 中的替代
Presentation
方法签名 | 替代方法签名 |
---|---|
public final BufferedImage[] getThumbnails(IRenderingOptions options) | public final IImage[] getImages(IRenderingOptions options) |
public final BufferedImage[] getThumbnails(IRenderingOptions options, float scaleX, float scaleY) | public final IImage[] getImages(IRenderingOptions options, float scaleX, float scaleY) |
public final BufferedImage[] getThumbnails(IRenderingOptions options, int[] slides) | public final IImage[] getImages(IRenderingOptions options, int[] slides) |
public final BufferedImage[] getThumbnails(IRenderingOptions options, int[] slides, float scaleX, float scaleY) | public final IImage[] getImages(IRenderingOptions options, int[] slides, float scaleX, float scaleY) |
public final BufferedImage[] getThumbnails(IRenderingOptions options, int[] slides, Dimension imageSize) | public final IImage[] getImages(IRenderingOptions options, int[] slides, Dimension imageSize) |
public final BufferedImage[] getThumbnails(IRenderingOptions options, Dimension imageSize) | public final IImage[] getImages(IRenderingOptions options, Dimension imageSize) |
Shape
方法签名 | 替代方法签名 |
---|---|
public final BufferedImage getThumbnail() | public final IImage getImage() |
public final BufferedImage getThumbnail(int bounds, float scaleX, float scaleY) | public final IImage getImage(int bounds, float scaleX, float scaleY) |
Slide
方法签名 | 替代方法签名 |
---|---|
public final BufferedImage getThumbnail() | public final IImage getImage() |
public final BufferedImage getThumbnail(float scaleX, float scaleY) | public final IImage getImage(float scaleX, float scaleY) |
public final BufferedImage getThumbnail(IRenderingOptions options) | public final IImage getImage(IRenderingOptions options) |
public final BufferedImage getThumbnail(IRenderingOptions options, float scaleX, float scaleY) | public final IImage getImage(IRenderingOptions options) |
public final BufferedImage getThumbnail(IRenderingOptions options, Dimension imageSize) | public final IImage getImage(IRenderingOptions options, Dimension imageSize) |
public final BufferedImage getThumbnail(ITiffOptions options) | public final IImage getImage(ITiffOptions options) |
public final BufferedImage getThumbnail(Dimension imageSize) | public final IImage getImage(Dimension imageSize) |
public final void renderToGraphics(IRenderingOptions options, Graphics2D graphics) | 将完全删除 |
public final void renderToGraphics(IRenderingOptions options, Graphics2D graphics, float scaleX, float scaleY) | 将完全删除 |
public final void renderToGraphics(IRenderingOptions options, Graphics2D graphics, Dimension renderingSize) | 将完全删除 |
Output
方法签名 | 替代方法签名 |
---|---|
public final IOutputFile add(String path, BufferedImage image) | public final IOutputFile add(String path, IImage image) |
ImageCollection
方法签名 | 替代方法签名 |
---|---|
public final IPPImage addImage(BufferedImage image) | public final IPPImage addImage(IImage image) |
PPImage
方法签名 | 替代方法签名 |
---|---|
public final BufferedImage getSystemImage() | public final IImage getImage() |
PatternFormat
方法签名 | 替代方法签名 |
---|---|
public final BufferedImage getTileImage(Color styleColor) | public final IImage getTile(Color styleColor) |
public final BufferedImage getTileImage(Color background, Color foreground) | public final IImage getTile(Color background, Color foreground) |
PatternFormatEffectiveData
方法签名 | 替代方法签名 |
---|---|
public final java.awt.image.BufferedImage getTileImage(Color background, Color foreground) | public final IImage getTileIImage(Color background, Color foreground) |
对 Graphics2D 的 API 支持将被取消
带有 Graphics2D 的方法被声明为已弃用,并将从公共 API 中移除。
使用它的 API 部分将被移除:
- public final void renderToGraphics(IRenderingOptions options, Graphics2D graphics)
- public final void renderToGraphics(IRenderingOptions options, Graphics2D graphics, float scaleX, float scaleY)
- public final void renderToGraphics(IRenderingOptions options, Graphics2D graphics, Dimension renderingSize)