skia2/tools/gpu/gl/interface
Kevin Lubick 3902628e35 Support WebGL 1.0 with caps
There is some logic in here for 2.0 as well, just as a
"as long as I was looking at the specs", but only 1.0
is really supported.

This seems to resolve the bug where some GPUs weren't
advertising correctly that they had vertex array object
support, by checking for both extension names (with and
without "GL_" prefix)

Of note, this saves about 18 Kb (5.5 Kb gzipped) of code size
by compiling out the unneeded GLES checks/functionality.

Bug: skia:8378
Change-Id: I773bf4dbf231b991051d2a9f640b8047a9010e7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/203461
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
2019-03-28 17:21:23 +00:00
..
gen_interface.go Support WebGL 1.0 with caps 2019-03-28 17:21:23 +00:00
interface.json5 Support WebGL 1.0 with caps 2019-03-28 17:21:23 +00:00
Makefile Reland "Generate GrGLInterface and GrGlAssembleInterface* from table" 2019-03-26 10:55:00 +00:00
README.md Reland "Generate GrGLInterface and GrGlAssembleInterface* from table" 2019-03-26 10:55:00 +00:00
templates.go Support WebGL 1.0 with caps 2019-03-28 17:21:23 +00:00

GrGlInterface Autogeneration

Background

At a high level, the first three steps of making a GrGLInterface (a generic way to interact with a GL-like GPU) are:

  • Assemble: Copy a set of function pointers into the struct
  • Validate: Make sure the function pointers advertised actually exist.
  • Capabilities: Compute what fast/slow paths are enabled based on the functions in the struct (GrGLCaps, for short)

Autogeneration

The first two steps have been automated with a table-based generation script located in this folder. The table is in JSON5 format (like JSON, but with comments). O

Once edited, the Assemble/Validate code can be re-generated by running make generate in this folder.