现代 API
Contents
[
Hide
]
介绍
Aspose Slides 在历史上依赖于 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 被声明为过时。
为了解决对这些类的依赖,我们添加了所谓的“现代 API”——即应该代替过时 API 使用的 API,其签名包含对 BufferedImage 的依赖。Graphics2D 被声明为过时,其支持从公共 Slides API 中移除。
对依赖 System.Drawing 的过时公共 API 的移除将在 24.8 版本中进行。
现代 API
向公共 API 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 - 实例化和处理 IImage 接口的方法。
请注意,IImage 是可处置的(它实现了 IDisposable 接口,其使用应包裹在 using 中或以其他方便的方式处置)。
使用新 API 的典型场景如下所示:
var pres = new aspose.slides.Presentation();
try {
var ppImage;
// 从磁盘文件实例化 IImage 的可处置实例。
var image = aspose.slides.Images.fromFile("image.png");
try {
// 通过将 IImage 实例添加到演示文稿的图像中来创建 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(aspose.slides.ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
var size = java.newInstanceSync("java.awt.Dimension", 1920, 1080);
// 获取表示幻灯片 #1 的 IImage 实例。
var slideImage = pres.getSlides().get_Item(0).getImage(size);
try {
// 将图像保存到磁盘。
slideImage.save("slide1.jpeg", aspose.slides.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,您需要用新的方法替换对旧方法(使用 ImageIO)的调用。
旧:
var imageio = java.import("javax.imageio.ImageIO");
var size = java.newInstanceSync("java.awt.Dimension", 1920, 1080);
var slideImage = pres.getSlides().get_Item(0).getThumbnail(size);
var file = java.newInstanceSync("java.io.File", "image.png");
imageio.write(slideImage, "PNG", file);
新:
var size = java.newInstanceSync("java.awt.Dimension", 1920, 1080);
var slideImage = pres.getSlides().get_Item(0).getImage(size);
slideImage.save("image.png", aspose.slides.ImageFormat.Png);
slideImage.dispose();
获取幻灯片缩略图
使用过时 API 的代码:
var pres = new aspose.slides.Presentation("pres.pptx");
try {
var slideImage = pres.getSlides().get_Item(0).getThumbnail();
var imageio = java.import("javax.imageio.ImageIO");
var file = java.newInstanceSync("java.io.File", "slide1.png");
imageio.write(slideImage, "PNG", file);
} finally {
if (pres != null) pres.dispose();
}
现代 API:
var pres = new aspose.slides.Presentation("pres.pptx");
try {
var slideImage = pres.getSlides().get_Item(0).getImage();
slideImage.save("slide1.png", aspose.slides.ImageFormat.Png);
slideImage.dispose();
} finally {
if (pres != null) pres.dispose();
}
获取形状缩略图
使用过时 API 的代码:
var pres = new aspose.slides.Presentation("pres.pptx");
try {
var shapeImage = pres.getSlides().get_Item(0).getShapes().get_Item(0).getThumbnail();
var imageio = java.import("javax.imageio.ImageIO");
var file = java.newInstanceSync("java.io.File", "shape.png");
imageio.write(shapeImage, "PNG", file);
} finally {
if (pres != null) pres.dispose();
}
现代 API:
var pres = new aspose.slides.Presentation("pres.pptx");
try {
var shapeImage = pres.getSlides().get_Item(0).getShapes().get_Item(0).getImage();
shapeImage.save("shape.png");
shapeImage.dispose();
} finally {
if (pres != null) pres.dispose();
}
获取演示文稿缩略图
使用过时 API 的代码:
var pres = new aspose.slides.Presentation("pres.pptx");
try {
var size = java.newInstanceSync("java.awt.Dimension", 1980, 1028);
var bitmaps = pres.getThumbnails(new aspose.slides.RenderingOptions(), size);
for (var index = 0; index < bitmaps.length; index++)
{
var thumbnail = bitmaps[index];
var imageio = java.import("javax.imageio.ImageIO");
var file = java.newInstanceSync("java.io.File", "slide" + index + ".png");
imageio.write(thumbnail, "PNG", file);
}
} finally {
if (pres != null) pres.dispose();
}
现代 API:
var pres = new aspose.slides.Presentation("pres.pptx");
try {
var size = java.newInstanceSync("java.awt.Dimension", 1980, 1028);
var images = pres.getImages(new aspose.slides.RenderingOptions(), size);
try
{
for (var index = 0; index < images.length; index++)
{
var thumbnail = images[index];
thumbnail.save("slide" + index + ".png", aspose.slides.ImageFormat.Png);
}
}
finally
{
images.forEach(item => {item.dispose();});
}
} finally {
if (pres != null) pres.dispose();
}
向演示文稿添加图片
使用过时 API 的代码:
var pres = new aspose.slides.Presentation();
try {
var imageio = java.import("javax.imageio.ImageIO");
var file = java.newInstanceSync("java.io.File", "image.png");
var bufferedImages = imageio.read(file);
var ppImage = pres.getImages().addImage(bufferedImages);
pres.getSlides().get_Item(0).getShapes().addPictureFrame(aspose.slides.ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
} finally {
if (pres != null) pres.dispose();
}
现代 API:
var pres = new aspose.slides.Presentation();
try {
var image = aspose.slides.Images.fromFile("image.png");
var ppImage = pres.getImages().addImage(image);
image.dispose();
pres.getSlides().get_Item(0).getShapes().addPictureFrame(aspose.slides.ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
} finally {
if (pres != null) pres.dispose();
}
将要移除的方法及其在现代 API 中的替换
演示文稿
方法签名 | 替换方法签名 |
---|---|
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) |
形状
方法签名 | 替换方法签名 |
---|---|
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) |
幻灯片
方法签名 | 替换方法签名 |
---|---|
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 |
输出
方法签名 | 替换方法签名 |
---|---|
public final IOutputFile add(String path, BufferedImage image) | public final IOutputFile add(String path, IImage image) |
ImageCollection
方法签名 | 替换方法签名 |
---|---|
public final IPPImage addImage(BufferedImage image) | public final IPPImage addImage(IImage image) |
PPImage
方法签名 | 替换方法签名 |
---|---|
public final BufferedImage getSystemImage() | public final IImage getImage() |
PatternFormat
方法签名 | 替换方法签名 |
---|---|
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 | 替换方法签名 |
---|---|
public final java.awt.image.BufferedImage getTileImage(Color background, Color foreground) | public final IImage getTileIImage(Color background, Color foreground) |
API 对 Graphics2D 的支持将被中止
包含 Graphics2D 的方法被声明为过时,其支持将从公共 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)