This is first part of work on porting mapbox/mapbox-gl-js#8694 - in follow up patch(es) it is required to remove CPU side copy using 2d canvas support on all supported platforms, similar to approach taken in gl.js https://github.com/mapbox/mapbox-gl-js/pull/8694/files#diff-34dbe5f7de34dc4b9a8745dcde9bdc37R48
Decoding on CPU removed.
Padding is still done in DEMData() but, instead od doing it wwhile decoding, it is using memcpy to pad original values.
Rebase to latest mapbox-gl-js master and re-generate shaders.
Partly fixes: #15503
Follow the approach from mapbox-gl-js for enabling opaque pass for background layer (same as for fill layer).
Fix combinations/heatmap-translucent--background-opaque render test.
This fixes following issues:
* Fix some false passing combinations/fill-extrusion-translucent--XXXX tests
* Fix and enable other, failing but ignored, combinations/fill-extrusion-translucent--XXXX tests
* Fix rendering of layers that are on top of fill-extrusion layers
state.getProjMatrix(nearClippedProjMatrix, 100) caused that tests with size 64x64 were not
rendering fill extrusions: far plane calculated as 96.9 and near plane set to 100 was the cause.
near plane is changed from hardcoded 100 to depend on state.getCameraToCenterDistance() - producing
similar value but one that follows max zoom.
This caused that e.g. combinations/fill-extrusion-translucent--fill-opaque was falsely passing as
only fill-opaque layer got rendered.
combinations/fill-extrusion-translucent--XXXX tests expose regression https://github.com/mapbox/mapbox-gl-native/issues/14844#issuecomment-503600034 in #14844, #14779.
Fix (opaquePassCutoff, is3D) is ported from https://github.com/mapbox/mapbox-gl-js/pull/7821Fixes: #14844, #14779, #15039
In order to test the conversion from function to expressions using the
legacy tests in the expression test suite, parse function objects into
expressions in NodeExpression::Parse.
v2: Coding style fixes.
Refactor out HeadlessFrontend and HeadlessBackend gl independent code to gfx.
Define gl::HeadlessBackend as subclass, instantiated by gfx::HeadlessBackend static factory method.
GL dependent tests are still using gl::HeadlessBackend directly (not through gfx).
- Do not carry it over everywhere as parameter, it is a shared
instance anyway and the lifecycle is pretty much the app lifecycle
from the moment we instantiate a map.
- Rename to BackgroundScheduler because it is a Scheduler that will
do tasks in the background, we don't make assumptions if it is a
thread pool or a single thread.
- Most importantly, remove the dependency from `core` on `platform`.
