The compiler service needs to know what options to pass to the compiler,
and these options can affect the outcome of the shader blob. Runtime
compiled shader output must match this file name in the binary directory.
Pre-compiled shader blobs (e.g. those placed in a resource file) are
permitted to drop options from the file name if the implementor can
ensure the blob is compatible with the target.
Defines are not written out as options, but written into the shader
source, and therefore affect the cache key.
Change-Id: I11e4a43fcf6818ddb29aca5eba3d8647ba4021a1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Use of mkpath/mkdir is removed in order to make the proxy less
invasive when there is no compiler service running. Creation of the
directory structure is fully the service's responsibility.
Service availability is now only checked once, at the first invocation of
D3DCompile, as it is expected to be started before the application.
Change-Id: Ib8c4f062c418497c2253daf524654e1db30dae47
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
d3dcompiler_qt is a DLL for use with ANGLE which replaces d3dcompiler_XX
at runtime to proxy shader compilation calls. This is useful for:
- Loading the newest D3D compiler DLL found, instead of loading the
version specified when Qt was compiled
- Reporting better debug information when the compiler cannot be loaded
- Caching shader blobs for later use
- Returning cached shader blobs
- Deferring compilation to another mechanism, such as a D3D compilation
service running on a host debugging machine *
The above use cases are especially important for Windows Store apps, as
they are not allowed to ship the d3dcompiler. On Windows Phone, where
there is no runtime compiler, this is essential for handling QtQuick apps
which require runtime shader compilation.
* This requires a separate service which monitors a directory for shader
source files, compiles these files into D3D bytecode, and places
the bytecode in the qtd3dcompiler cache directory. This directory is
monitored by qtd3dcompiler, which is then able to then load the blob.
Change-Id: I9889c8d66d2ddbe5a7a1dc44bfe5d8ad229b0e43
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
