Commits on Dec 18, 2019

1. Bug 1600470 - Reduce the emboldening strength used for synthetic-bold… …

   … faces with FreeType. r=lsalzman
   
   Differential Revision: https://phabricator.services.mozilla.com/D57246
   
   [wrupdater] From https://hg.mozilla.org/mozilla-central/rev/f2d54eefdb444abf8a5dc66a8eafec16ba8c59fc

   

   jfkthame authored and moz-gfx committed Dec 18, 2019
   e27eb3a

2. Bug 1598380 - Use single PBO per texture for uploads. r=kvark …

   Uploading texture data is showing up frequently in profiles on Adreno devices,
   especially when zooming on a text-heavy page. Specifically, the time is spent in
   glMapBufferRange and glBufferSubData, most likely when internally allocating the
   buffer before transferring data in to it.
   
   Currently, we are creating a new PBO, by calling glBufferData(), for each
   individual upload region. This change makes it so that we calculate the required
   size for all upload regions to a texture, then create single a PBO of the
   required size. The entire buffer is then mapped only once, and each individual
   upload chunk is written to it. This can require the driver to allocate a large
   buffer, sometimes multiple megabytes in size. However, it handles this case much
   better than allocating tens or even hundreds of smaller buffers.
   
   An upload chunk may require more space in a PBO than the original CPU-side
   buffer, so that the data is aligned correctly for performance or correctness
   reasons. Therefore it is the caller of Device.upload_texture()'s responsibility
   to call a new function, Device.required_upload_size(), to calculate the required
   size beforehand.
   
   On AMD Macs, there is a bug where PBO uploads from a non-zero offset can
   fail. See bug 1603783. Therefore this patch preserves the current behaviour on
   AMD Mac, reallocating a new PBO for each upload, therefore ensuring the offset
   is always zero.
   
   Differential Revision: https://phabricator.services.mozilla.com/D56382
   
   [wrupdater] From https://hg.mozilla.org/mozilla-central/rev/44161695885886b689baae2ad8b357f81f3eef23

   

   jamienicol authored and moz-gfx committed Dec 18, 2019
   d272524

3. Bug 1604625 - Add nightly config value to enable GL error checking. r… …

   …=kvark
   
   Differential Revision: https://phabricator.services.mozilla.com/D57549
   
   [wrupdater] From https://hg.mozilla.org/mozilla-central/rev/35af0b925215124a619bc054aeeb8d01e99b4e63

   

   Glenn Watson authored and moz-gfx committed Dec 18, 2019

   Loading status checks…
   f432b60