delphi gif_在Delphi中使用GIF图像

本是古典何须时尚 2022-12-06 15:46 259阅读 0赞

delphi gif

Even though Delphi does not natively support GIF image files formats (like BMP or JPEG), there are a few great (free source) components available on the Net, which add the ability to display and manipulate GIF images at run as well as at design time to any Delphi application.

即使Delphi本身不支持GIF图像文件格式(如BMP或JPEG)，网络上也有一些很棒的(免费源)组件，这些组件增加了在运行和设计时显示和操作GIF图像的功能。时间到任何Delphi应用程序。

Natively, Delphi supports BMP, ICO, WMF, and JPG images. These can be loaded into a graphics-compatible component (such as TImage) and used in an application.

本机，Delphi支持BMP，ICO，WMF和JPG图像。 这些可以加载到图形兼容组件(例如TImage)中，并在应用程序中使用。

It's important to note that, as of Delphi version 2006, GIF format is supported by the VCL. To use animated GIF images you would still need a third-party control.

重要的是要注意，从2006年的Delphi版本开始，VCL支持GIF格式。 要使用动画GIF图像，您仍然需要第三方控件。

GIFs--or Graphics Interchange Formats--are the most widely supported (bitmap) graphics format on the Web, both for still images and for animations.

GIF(或图形交换格式)是Web上最受支持的(位图)图形格式，用于静止图像和动画。

## 在Delphi中使用 **(** Using in Delphi **)** ##

Natively, Delphi (until version 2007) does not support GIF images, due to some legal [copyright issues][]. What this means, is that when you drop a TImage component on a form, use the Picture Editor (click the ellipsis button in the Value column for properties, such as the Picture property of TImage) to load an image into the TImage, you will not have an option to load GIF images.

由于某些法律[版权问题][copyright issues] ，Delphi本机(直到2007年版本)不支持GIF图像。 这意味着在将TImage组件拖放到窗体上时，使用图片编辑器(单击“属性”的“值”列中的省略号按钮以获取属性，例如TImage的“图片”属性)将图像加载到TImage中，没有加载GIF图像的选项。

Fortunately, there are a few third-party implementations on the Internet that provide full support for the GIF format:

幸运的是，Internet上有一些第三方实现可以完全支持GIF格式：

*  TGIFImage: free with source (a version of Anders Melander's TGIFImage ported to Delphi 7). Full TGraphic implementation of the GIF graphics format. Reads, writes and displays animated and transparent GIFs and can convert to and from any format supported by TGraphic (e.g TBitmap, TJPEGImage, TIcon, TMetaFile, etc.). Implements the complete GIF87a and GIF89a specification and most common GIF extensions. Advanced features include:
    
    TGIFImage：免费提供源代码(Anders Melander的TGIFImage版本已移植到Delphi 7)。 GIF图形格式的完整TGraphic实现。 读取，写入和显示动画透明GIF，并且可以与TGraphic支持的任何格式(例如TBitmap，TJPEGImage，TIcon，TMetaFile等)进行转换。 实现完整的GIF87a和GIF89a规范以及最常见的GIF扩展。 高级功能包括：
    
     *  Integrates with TPicture to add GIF support to the TImage, TOpenPictureDialog and TSavePictureDialog components. Also works at design time.
        
        与TPicture集成以将GIF支持添加到TImage，TOpenPictureDialog和TSavePictureDialog组件。 在设计时也可以使用。
     *  Imports images with more than 256 colors using color quantization and 6 different dithering methods (e.g. Floyd-Steinberg).
        
        使用颜色量化和6种不同的抖动方法(例如Floyd-Steinberg)导入具有256种以上颜色的图像。
     *  Multi-threaded drawing engine.
        
        多线程绘图引擎。
     *  GIF optimizer reduces the size of your GIFs.
        
        GIF优化器可减小GIF的大小。
     *  GIF to AVI and AVI to GIF converter.
        
        GIF到AVI和AVI到GIF转换器。
 *  GraphicEx image library: an addendum to Delphi's Graphics.pas to enable your application to load many common image formats. This library is primarily designed to load images as background (buttons, forms, toolbars) and textures (DirectX, OpenGL) or for image browsing and editing purposes as long as you don't need to save images. Currently, only TTargaGraphic also supports saving an image. GraphicEx is open source under the Mozilla Public License (MPL).
    
    GraphicEx图像库：Delphi的Graphics.pas的附录，使您的应用程序可以加载许多常见的图像格式。 该库主要用于将图像作为背景(按钮，表单，工具栏)和纹理(DirectX，OpenGL)加载，或者用于图像浏览和编辑目的，只要您不需要保存图像即可。 当前，只有TTargaGraphic还支持保存图像。 根据Mozilla公共许可(MPL)，GraphicEx是开源的。

That's about it. Now all you have to do is to download one of the components and start using gif images in your applications.You can, for example:

就是这样 现在您所要做的就是下载其中一个组件并开始在应用程序中使用gif图像。例如，您可以：

*  Store GIF images in a [database][] table. You'll need the GIF image's "[magic numbers][]."
    
    将GIF图像存储在[数据库][database]表中。 您需要GIF图片的“ [幻数”][magic numbers] 。
 *  Show GIF graphics as Glyph on a SpeedButton.
    
    在SpeedButton上将GIF图形显示为字形。
 *  Store GIF graphics and an HTML file as a [resource][] inside am exe.
    
    将GIF图形和HTML文件存储为exe中的[资源][resource] 。

> 翻译自: [https://www.thoughtco.com/working-with-gif-images-in-delphi-1058070][https_www.thoughtco.com_working-with-gif-images-in-delphi-1058070]

delphi gif

[copyright issues]: https://mike.pub/19950127-gif-lzw
[database]: https://www.thoughtco.com/what-is-a-relational-database-958324
[magic numbers]: https://ptolemy.berkeley.edu/eecs20/sidebars/images/gif.html
[resource]: https://www.thoughtco.com/how-delphi-uses-resource-files-4077232
[https_www.thoughtco.com_working-with-gif-images-in-delphi-1058070]: https://www.thoughtco.com/working-with-gif-images-in-delphi-1058070