gles2: Major renderer optimization. Work in progress!

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This moves all the rendering to a command list that is flushed to the GL as
necessary, making most common activities upload a single vertex buffer per
frame and dramatically reducing state changes. In pathological cases,
like Emscripten running on iOS's Safari, performance can go from a dozen
draw calls killing your performance to 1000 draw calls running smoothly.

This is work in progress, and not ready to ship. Among other things, it has
a hardcoded array that isn't checked for overflow. But the basic idea is
sound!

--HG--
branch : SDL-ryan-batching-renderer
extra : source : eae4631409c03d3b7ab2e87526193d86ce996ba8

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This commit is contained in:

Ryan C. Gordon 2018-09-08 18:26:11 -04:00

parent 961a84f88e

commit cc9ee08b65

3 changed files with 490 additions and 459 deletions

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src/render/opengles2/SDL_render_gles2.c

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