draw vertices: fast triangles using a shader
Introduce a new call to SkShaderBase to return an
SkUpdatableShader. An SkUpdatableShader is both a SkShaderBase
and has an update() method.
If the onUpdatableShader call returns !nullptr, then the
shader's specialized updatable shader is used. Otherwise,
the shader is wrapped in a TexCoordShader.
This scheme allows Shaders to have specialized updaters,
but also adds updaters for shaders that don't need
specialization.
orig this bench
771µs 779µs verts_textures_colors
217µs 335µs verts_textures
275µs 380µs verts_textures_persp
Bug=skia:11822
Change-Id: I11ba344eba96188c5631228cd5e91c5d834ea3d6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/429417
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Mike Reed <reed@google.com>
10 files changed