Reland "Add vulkan format image fallback for R16G16B16" Suppressed misbehaving trace test in https://crrev.com/c/4317088 This is a reland of commit 71f6d54c8d3662693283281651e57c994a10cf08 Original change's description: > Add vulkan format image fallback for R16G16B16 > > This change adds a vulkan format image mapping fallback from R16G16B16 > to R16G16B16A16, R32G32B32_FLOAT and R32G32B32A32_FLOAT for both > UNORM and SNORM variants. > > This is done because in Chrome we want to use R16/RG16 formats which > are exposed to Skia over the EXT_texture_norm16. Currently, > EXT_texture_norm16 requires RGB16_EXT which if not present is not > supported even if R16_EXT and RG16_EXT are supported. This fallback > helps us support R16/RG16 as well over RGBA16. > > It also updates validationES checks for GL_RGBA signed and unsigned > normalized checking if type is GL_SHORT or GL_UNSIGNED_SHORT. > > It adds a method LoadToFloat that allows a type (GLushort or GLshort) > to be loaded into float format types. This is then used as part of > fallbacks for load_functions_data.json. > > Bug: None > Change-Id: I5c6879cd2ed5dd6e3440877f4891f269d96d88a1 > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4294694 > Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org> > Reviewed-by: Geoff Lang <geofflang@chromium.org> > Commit-Queue: Geoff Lang <geofflang@chromium.org> Bug: None Change-Id: I101dd9e8c62e6794692c9f89c4944297e195f710 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4317089 Reviewed-by: Cody Northrop <cnorthrop@google.com> Auto-Submit: Roman Lavrov <romanl@google.com> Commit-Queue: Cody Northrop <cnorthrop@google.com>