This eliminates the reliance on ThreadContext to provide GLObjectStore, and statically enforces that GL cleanup functions happen only when GLObjectStore::performCleanup is called.
With the elimination of the Map thread, this becomes important because there may be multiple GLObjectStore's per-thread, and Map will need to ensure that the correct context is active when calling GLObjectStore::performCleanup.
Before C++11, std::list's implementation of size was O(n). It should be
all O(1) now, but it is probably still a good idea to use empty() to
emphasize the intend.
https://github.com/mapbox/mapbox-gl-js/pull/1359
Round line joins used to be drawn by adding a semicircle cap to the end
of each segment. This looked fine for opaque lines not for
semi-transparent lines.
This changes the triangulation so that round line joins don't overlap
with segments. The gap between segments is filled with small triangles
that look like pie slices. The edge of the round linejoin is made up of
many short straight lines that look round at the sizes we draw lines.
Since sharp angles are infrequent, this does not significantly affect
the total number of triangles created.
Joins for angles that are really sharp are still drawn with overlap.
This moves all texture updates and buffer uploads to the beginning of every frame, before we issue any drawing commands. This means the GPU typically has much more time to upload the data in the background until we actually need it, and doesn't have to pause to store/load the framebuffer.
- switches to dash units that are scaled by line width
- adds a lineatlas to store patterns line dashed lines
- adds linesdf shader which renders line fill from the lineatlas
js: 8e83d76af3bd877eb9639c02e296363e2c0186f8
