CoreImage：EAGLContext 帧缓冲区或渲染缓冲区配置不正确

发布于 2025-01-05 07:17:27 字数 812 浏览 5 评论 0原文

当我设置 GLKViewController/GLKView 来使用 CoreImage 进行绘图时，我有时会在标题中收到通知。

设置如下所示：

_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];

self.view.context = _context;
self.view.drawableDepthFormat = GLKViewDrawableDepthFormat24;
self.view.backgroundColor = UIColor.blackColor;
self.view.contentScaleFactor = UIScreen.mainScreen.scale;

glGenRenderbuffers(1, &_render_buffer);
glBindRenderbuffer(GL_RENDERBUFFER, _render_buffer);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);

_core_image_context = [CIContext contextWithEAGLContext: _context];

[EAGLContext setCurrentContext:_context];

我在 GLKView 中有 UIKit 子视图，似乎当我添加/删除视图时，它会以某种方式暂时使上下文无效。问题是（除了在极少数情况下我仍然需要角落）我可以毫无麻烦地在上下文中绘制下一个更新。

如果失败，我可以重试绘图，但我如何知道上下文无效？我该如何检测它或防止它失效？

原文

When I setup a GLKViewController/GLKView for drawing with CoreImage I sometimes get the notice in the title.

The setup looks like this:

_context = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];

self.view.context = _context;
self.view.drawableDepthFormat = GLKViewDrawableDepthFormat24;
self.view.backgroundColor = UIColor.blackColor;
self.view.contentScaleFactor = UIScreen.mainScreen.scale;

glGenRenderbuffers(1, &_render_buffer);
glBindRenderbuffer(GL_RENDERBUFFER, _render_buffer);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);

_core_image_context = [CIContext contextWithEAGLContext: _context];

[EAGLContext setCurrentContext:_context];

I have UIKit subviews in the GLKView and it seems that when I add/remove views it somehow invalidate the context temporarily.
The thing is (except in some rare cases I still need to corner) the next update I can draw in the context without troubles.

I'm ok to retry drawing if it fails but how can I know that the context is invalid? How am I supposed to detect it or prevent it from being invalidated?

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