2019-10-17 14:23:01 +08:00
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## gif\_image\_t
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### 概述
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2019-12-14 13:25:56 +08:00
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GIF图片控件。
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> 注意：GIF图片的尺寸大于控件大小时会自动缩小图片，但一般的嵌入式系统的硬件加速都不支持图片缩放，
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所以缩放图片会导致性能明显下降。如果性能不满意时，请确认一下GIF图片的尺寸是否小余控件大小。
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gif\_image\_t是[image\_base\_t](image_base_t.md)的子类控件，image\_base\_t的函数均适用于gif\_image\_t控件。
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在xml中使用"gif"标签创建GIF图片控件。如：
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```xml
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<gif image="bee"/>
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```
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>更多用法请参考：
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[gif
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image](https://github.com/zlgopen/awtk/blob/master/demos/assets/default/raw/ui/gif_image.xml)
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在c代码中使用函数gif\_image\_create创建GIF图片控件。如：
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```c
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widget_t* image = gif_image_create(win, 10, 10, 200, 200);
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image_set_image(image, "bee");
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```
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> 创建之后:
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>
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> 需要用widget\_set\_image设置图片名称。
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> 完整示例请参考：[gif image demo](
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https://github.com/zlgopen/awtk-c-demos/blob/master/demos/gif_image.c)
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可用通过style来设置控件的显示风格，如背景和边框等。如：
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```xml
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<gif>
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<style name="border">
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<normal border_color="#000000" bg_color="#e0e0e0" text_color="black"/>
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</style>
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</gif>
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```
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> 更多用法请参考：[theme default](
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https://github.com/zlgopen/awtk/blob/master/demos/assets/default/raw/styles/default.xml)
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2019-10-17 14:23:01 +08:00
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----------------------------------
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### 函数
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<p id="gif_image_t_methods">
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| 函数名称 | 说明 |
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| -------- | ------------ |
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| <a href="#gif_image_t_gif_image_cast">gif\_image\_cast</a> | 转换为gif_image对象(供脚本语言使用)。 |
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| <a href="#gif_image_t_gif_image_create">gif\_image\_create</a> | 创建gif_image对象 |
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#### gif\_image\_cast 函数
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-----------------------
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* 函数功能：
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2019-11-15 11:33:43 +08:00
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> <p id="gif_image_t_gif_image_cast">转换为gif_image对象(供脚本语言使用)。
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2019-10-17 14:23:01 +08:00
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* 函数原型：
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```
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widget_t* gif_image_cast (widget_t* widget);
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```
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* 参数说明：
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | widget\_t* | gif\_image对象。 |
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| widget | widget\_t* | gif\_image对象。 |
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#### gif\_image\_create 函数
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-----------------------
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* 函数功能：
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2019-11-15 11:33:43 +08:00
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> <p id="gif_image_t_gif_image_create">创建gif_image对象
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2019-10-17 14:23:01 +08:00
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* 函数原型：
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```
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widget_t* gif_image_create (widget_t* parent, xy_t x, xy_t y, wh_t w, wh_t h);
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```
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* 参数说明：
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | widget\_t* | 对象。 |
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| parent | widget\_t* | 父控件 |
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| x | xy\_t | x坐标 |
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| y | xy\_t | y坐标 |
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| w | wh\_t | 宽度 |
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| h | wh\_t | 高度 |
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