Currently, font renderers eliminate some texture caches when
memory is trimmed. This change makes it go further by eliminating the
large-glyph caches for all font renderers. These caches are
only allocated as needed, but continue to consume large amounts of
memory (CPU and GPU) after that allocation. De-allocating this memory
on a trim operation should prevent background apps from holding onto
this memory in the possible case that they have allocated it by drawing
large glyphs.
Change-Id: Id7a3ab49b244e036b442d87252fb40aeca8fdb26
There were 2 issues remaining after a recent change to support
glyph caching from multiple textures:
- memory in the GPU for all textures was being allocated automatically.
This is now lazy, being allocated only when those textures are first
needed.
- filtering (applied when a rendered object is transformed) was ignoring
the new multiple-texture structure. Filtering should be applied correctly
whenever we change textures.
Change-Id: I5c8eb8d46c73cd01782a353fc79b11cacc2146ab
Some GPU architectures could not handle the previous implementation
of our glyph cache. Frequent uploads would cause memory problems in the GPU
and eventually a crash due to these memory issues. The solution is to move to
a system of several, smaller caches instead of one monolythic cache for all
glyphs.
Change-Id: I0fc7a323360940d16d5a33eeb33abfab194c5920
This optimization along with the previous one lets us render an
application like Gmail using only 30% of the number of GL commands
previously required
Change-Id: Ifee63edaf495e04490b5abd5433bb9a07bc327a8
Glyphs drawn with paints that had different textScaleX values were not
being recognized as different, so the glyph cache was being used regardless
of different scaleX values. This change adds the scaleX attribute to the native
Font object to allow the cache to distinguish between this difference and cache
accordingly.
Change-Id: I5d8fc26d47460b27dc8e373a473d46b2f1b8dc30
This optimization is currently disabled until Launcher is
modified to take advantage of it. The optimization can be
enabled by turning on RENDER_LAYERS_AS_REGIONS in the
OpenGLRenderer.h file.
Change-Id: I2fdf59d0f4dc690a3d7f712173ab8db3848b27b1
