[Mesa-dev] [RFC] spec: MESA_program_binary

[Edward O'Callaghan]

On 02/16/2017 01:52 PM, Timothy Arceri wrote:
> In order add functionality to ARB_get_program_binary we need
> binary format enums.
> ---
> 
> Techland games such as Dead Island and Dying Light make use of 
> GetProgramBinary(). My current guess is the Dead Island crash
> https://bugs.freedesktop.org/show_bug.cgi?id=85564 is caused
> due to buggy handling of this feature not being available.
> 
> Anyway I'm not sure how we go about getting Khronos to assign
> enums for the binary formats but thought I'd send this to the
> list for discussion.
> 
>  docs/specs/MESA_program_binary.txt | 78 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 78 insertions(+)
>  create mode 100644 docs/specs/MESA_program_binary.txt
> 
> diff --git a/docs/specs/MESA_program_binary.txt b/docs/specs/MESA_program_binary.txt
> new file mode 100644
> index 0000000..b34e42e
> --- /dev/null
> +++ b/docs/specs/MESA_program_binary.txt
> @@ -0,0 +1,78 @@
> +Name
> +
> +    MESA_program_binary
> +
> +Name Strings
> +
> +    GL_MESA_program_binary
> +
> +Contact
> +
> +    Timothy Arceri (tarceri 'at' itsqueeze.com)
> +
> +Status
> +
> +    Complete.
> +
> +Version
> +    
> +    Last Modified Date: February 16, 2017
> +    Revision: #1
> +
> +Number
> +
> +    ???
> +
> +Dependencies
> +
> +    OpenGL ES 2.0 is required.
> +
> +    Written based on the wording of the OpenGL ES 2.0 specification.
> +
> +    This extension interacts with OES_get_program_binary.
> +
> +Overview
> +
> +    MESA provides drivers for multiple hardware vendors. This extension
> +    provides binary formats in order to avoid conflicts between drivers when
> +    loading precompiled binaries.
> +
> +New Procedures and Functions
> +
> +    None.
> +
> +New Tokens
> +
> +    Accepted by the <binaryFormat> parameter of ShaderBinary:
> +
> +        MESA_PROGRAM_BINARY_AMD                    ????

Hey Timothy,

What happens in the case when say, non-GCN vs. GCN vs.
other-shinny-new-ISA? Since this is for mesa_ would it be better to have
something like,

MESA_PROGRAM_BINARY_GALLIUM, MESA_PROGRAM_BINARY_NIR or am I
misunderstanding something (probably?)

Kindest Regards,
Edward.

> +        MESA_PROGRAM_BINARY_NV                     ????
> +        MESA_PROGRAM_BINARY_INTEL                  ????
> +        MESA_PROGRAM_BINARY_BCOM                   ????
> +        MESA_PROGRAM_BINARY_QCOM                   ????
> +
> +Additions to Chapter 2 of the OpenGL ES 2.0 Specification (OpenGL Operation)
> +
> +    Add the following paragraph to the end of section 2.10.2:
> +
> +    "Depending on the hardware in use the apropriate <binaryFormat> is
> +    returned when querying the list of SHADER_BINARY_FORMATS.
> +
> +    Pre-compiled shader binaries in this format may be loaded via ShaderBinary.
> +
> +    When a binary fails to load, an INVALID_VALUE error is generated and a
> +    more detailed error message is appended to the shader's info log."
> +
> +Errors
> +
> +    INVALID_VALUE is generated if the <binary> parameter to ShaderBinary was
> +    produced with an incompatible version of the MESA shader compiler.
> +
> +New State
> +
> +    None.
> +
> +Revision History
> +
> +    #01    02/16/2010    Timothy Arceri       First draft.
> +
> 

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