Commits on Apr 7, 2020

1. Bug 1627413: WebRender: Don't pass level-of-detail bias value to GLSL… …

   … texture function. r=cbrewster
   
   The `sampleInUvRect` function in `gfx/wr/webrender/res/cs_svg_filter.glsl` calls
   `texture`, passing the optional third argument that specifies a bias to the
   sampler's level-of-detail calculation, used for mipmap interpolation. However,
   the `texture` override in `gfx/wr/swgl/src/glsl.h` that accepts this parameter
   is stubbed out, with an `assert(0)`. This causes twelve tests in
   `gfx/wr/wrench/reftests/filters` to crash.
   
   Nothing in Firefox uses mipmaps, and Servo doesn't use Software WebRender, so it
   should be fine for that call to `texture` to simply not pass the level-of-detail
   bias.
   
   This patch makes that change.
   
   Differential Revision: https://phabricator.services.mozilla.com/D69867
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/89e164da5af7b9a9152deacdb06bb5b36d3bf2b8

   

   Jim Blandy authored and moz-gfx committed Apr 7, 2020
   7b2f79c

2. Bug 1627355 - implement missing SWGL texture rectangle binding. r=jimb …

   Differential Revision: https://phabricator.services.mozilla.com/D69894
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/31efa8051c3a4b54c07bfa361784d274c8dc847f

   

   Lee Salzman authored and moz-gfx committed Apr 7, 2020
   4636599

3. Bug 1627413 - implement texture lod-bias. r=jimb …

   Differential Revision: https://phabricator.services.mozilla.com/D69873
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/80476f6d2daa4f842ef10e916c495540132fe25b

   

   Lee Salzman authored and moz-gfx committed Apr 7, 2020
   517f242

4. Bug 1621382 - implement perspective-correct rasterization for SWGL sh… …

   …aders with PERSPECTIVE feature. r=jrmuizel
   
   This implements Z plane clipping, gl_FragCoord.zw interpolation, and vertex attribute perspective-correction with support from the glsl-to-cxx compiler by using PERSPECTIVE feature in a WR shader.
   
   Differential Revision: https://phabricator.services.mozilla.com/D69429
   
   [ghsync] From https://hg.mozilla.org/mozilla-central/rev/88a4ebce9de0a0b261747ce7327f26600a551475

   

   Lee Salzman authored and moz-gfx committed Apr 7, 2020

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