PictureShader = picture + tiling + depth/colorspace + filtering [+ scale]
Today we cache the imageshader that is used to rendering. However, the
key for that cache is the pictureshader's ID itself... which means if
we have several, all using the same picture (but maybe diff tiling) we
would create dup cache entries.
Idea:
1. only cache the image (rastered picture), not an imageShader
2. key the cache on the picture's ID, not the shader's
Several implications of this:
1. Should get more cache reuse, since we don't care about the
shader's ID (which is just wrapping a picture+tiling, etc.)
2. We also eliminate the indirection of creating a PictureImage. Instead
we're creating real (pixel) images, and caching those. This removes one
extra layer of "cache".
Idea: when we cache something for pict
Change-Id: I51cf4e9bff3c91ce1872876597d3d565039d8c7a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/377844
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
ff83dda8cd