杂乱 1.6。第一次单独减慢屏幕渲染速度

Question

我们使用 clutter 来渲染屏幕并处理 IMX31 板上的 GUI 事件。

问题描述：-

    On startup the buttons,texture will be loaded into memory. When we click any buttons then associated panel(ClutterGroup) will be processed and shown in Clutter main stage.

当处理所有子项并使其可见时，屏幕渲染第一次很慢。它还首次在 clutter-stage.c 中抛出 230 重绘错误消息。 屏幕渲染时间超过2秒。

Clutter-Message: [PAINT] ./clutter-stage.c:3369: First redraw request
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 1
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 2
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [TEXTURE] ./clutter-texture.c:311: Texture realized
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 3
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 4
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 5
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 6
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 7
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 8
Clutter-Message: [PAINT] ./clutter-stage.c:3380: Redraw request number 9

                               .....................

当我们再次进入同一屏幕时，屏幕转换非常快，以微秒为单位。

并且不会再有更多的重画消息，只有 19 条重画消息。

只是我想知道如何避免 clutter-stage.c (Clutter 1.6) 中的重绘请求？ 哪个杂乱函数调用会触发重绘请求？

预先致谢，

谨致问候， 卡西克

Answer 1

首先，Clutter 1.6 是旧的稳定版本，因此您可能需要检查 Clutter 1.8。

您在初始帧上的速度变慢可能是由于将图像数据上传到 GPU 所致：此操作很敏感，并且取决于您可以使用的内存带宽量。

我的建议是尝试不要在启动时同步加载所有纹理，而是单独且延迟地加载每个纹理，一次一个。