java - about opengles and texture on android -

-

As we know, OpenGL ES class renderer In 3 function: onDrawFrame, onSurfaceChanged, onSurfaceCreated and we can load the texture in onSurfaceCreated and onDrawFrame . I want to know that I can load the texture before "renderer" . Maybe, I have a square named "map", and I can load the image texture in "map" before making "GLSurfaceView" or "Onsufficient" And the "onDrawFrame" function can load textures before the images.

If someone knows this, please help me.

Thank you!

Not easily but (almost) anything is possible.

The important concept to understand here is that OpenGL calls work on a current reference before you can make OpenCL calls, you have to make a reference and turn it on. . The current reference applies to a thread, so different threads can have current current references. I do not think it is clearly defined that what happens if you try to make OpenGL calls without the current context, but it is definitely not useful. Most likely the result is nothing, or the accident.

GLSurfaceView manages all the complexities of setting references for you, it creates a presentation thread that runs independently from the main thread (UI), creates a reference , And creates the current reference in the rendering thread. Once applicable to your GLSurfaceView.Renderer implementation, you already have an existing reference, and you are ready to make OpenGL calls.

Now, if you want to make OpenGL calls to all those GLSurfaceView before magic, you have to do a lot of things you can do to create your own reference class methods Can call, and turn it on. It's a bit painful, but not very difficult, I do not have a complete code available, but you should be able to find an example or understand it with documentation. You will use methods like eglChooseConfig () , eglCreateContext () , eglMakeCurrent () , and possibly a handful on the way.

Once you work with it, you can make your own OpenGL call to make texture. But unfortunately, this is not the whole story yet.

Once your GLSurfaceView arrives for life, it can share various OpenGL reference resources (such as texture) that will create their own context as usual, but they Do not do this by default because GLSurfaceView does not know anything about the context you've already created, it will not share resources with your reference.

To enable resource sharing, you have to interfere with the creation of the reference by GLSurfaceView you can do it by setEGLContextFactory Code> GLSurfaceView allows you to hook your own reference creation, where you can now create a reference that shares the resource with the reference you made earlier, and for your texture loading is used to.

Comments

Post a Comment

Popular posts from this blog

ios - Adding an SKSpriteNode to SKScene from a child SKSpriteNode -

-
I have a SKScene where I am adding an SKSpriteNode I have subclassed the SKSpriteNode class to create this node. In the subclass I am defining some SKActions on Sprite. What do I want to do when the end of this phantom ends the SKAction sequence, then I add a new Prayer node to this scene. How is this possible. The following code is mine: The code for the sequence is that I'm running on the Scansprinitode subclass (TEMissileNode): - SKAction * moveDown = [SKAction moveToY: Self.position.y - 20 Duration: 0.2]; SKAction * animation = [SKAction animateWithTextures: textures timePerFrame: time / 7]; SKAction * moveMissileProjectile = [SKAction Moving: Pointoffscreen Term: Time]; SKAction * group = [SKAction group: @ [animation, movement projectile]]; SKAction * Sequence = [SKAction Sequence: @ [Hilldown, Group, [SKAction removalFromParent]]]; [Self run action: sequence]; From the main scene, I call those actions that execute these tasks TEMissileNode * missile = [tmissil...
Read more

Matlab transpose a table vector -

-
An embarrassing simple question seems to be, but how can I move a Matlab table vector? aTableT = aTable '; I tried a standard syntax for the simple interaction of a line vector to a line vector aTable : ATableT = reshape (aTable, 1, Height (aTable)); and aTableT = rot90 (aTable); According to the head, the last time table should work for table, see. However, I get this error code: Error type in using table / permit (line 396) Undefined function 'permute' for the input arguments. Error in rot 90 (line 29) b = magnitude (b, [2 1 3: ndims (a)]); NB: fliplr is not useful either pretty sure I have covered clear angles - any ideas? Thanks! Try changing your table into an array, move it, then back to a table In other words, try doing this: aTableArray = table2array (aTable); ATableT = array 2table (aTableArray. '); I have also read the document for rot90 , and it says that rot90 is definitely working for tables Do, and I find you...
Read more

c# - Textbox not clickable but editable -

-
I have a small form with 10 text boxes, I have set them in the correct tab order. I want them on my tab service I was wondering if there is a way to set the text box so that they can be selected for editing until they are tabbed. That is ... I do not want the end user to edit the text box to click on them, I just want to make them editable through tabu. this should do the trick public partial category poor text box: Text Box {Safe Override Zero WndProc (Ref: Message Message) {if (m.msg == (Int) WM.LBUTTONDOWN) {Return; // mount down events} base.WndProc (ref m); }} Window message enum can be found. How to do this without anherizing: text box : class EatMouseDown: netwindows {safe override zero WndProc (ref message message) {if (m.msg == (int) WM.LBUTTONDOWN) {return; } Base.WandProc (Ref M); }} Safe Override Zero Onload (EventEurge E) {base.OnLoad (e); How to do this without any part: left a clean part, whatever is important, this can be a buggy but it works R...
Read more