Commits on Nov 20, 2018

1. Use an intermediate renderbuffer when blitting between texture arrays… …

   … on adreno devices
   
   When the texture cache is grown we allocate a larger texture array
   then copy each layer of the old array in to the new one. To perform
   this copy we use use glBlitFramebuffer, with the read and draw
   framebuffers bound to the correct layer in the old and new textures.
   
   Unfortunately on Adreno devices this does not work. glBlitFramebuffer
   always writes to the 0th layer of the texture bound to the draw
   framebuffer. glCopyTexSubImage3D also does not work correctly - it
   always reads from the 0th layer of the texture bound to the read
   framebuffer.
   
   As a workaround, we use glBlitFramebuffer to blit from the old texture
   in to a temporary renderbuffer, then use glCopyTexSubImage3D to copy
   from that renderbuffer to the new texture.

   

   jamienicol committed Nov 20, 2018

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