Re: [Gnash-dev] OpenGL buffering question

[Rob Savoye]

Dima Codreanu wrote:

> Is it possible that two consequitive SwapBuffers() are called (with only 
> irelevant calls between them),
> or maybe gl_ClearBuffers(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | 
> ...<other used buffers>) isnt called between the SwapBuffers() so a 
> previous image is in the buffer, and the new triangles don't get 
> rendered since the z-test whould prevent them from being drawn (or any 
> other tests of a buffer that has not been cleaned).

  What's weird is the previous SwapBuffer is from a completely 
different run of Firefox, so it's like it's stuck in memory someplace. 
I'll try clearing the buffer.

> The second case whould show the effect you are describing, while the 
> first whould result in some flickering (I doubt it could be done so fast 
> that the human eye wouldn't notice the flickering).
> If this is a multithreading problem, then it is more serious.

  I'm pretty sure I nailed all the threading issues. I can tell they're 
working because if I obscure a window and then expose it, the graphic 
gets redraw by the Gnash event loop. Besides, for this level of testing 
I'm only using one instantiation of the plugin.

        - rob -