I don't understand this. Can you explain it?
AFAIK, shared variables don't need a backing buffer.
Thanks,
Marek
On Sun, Jan 24, 2016 at 10:09 PM, Samuel Pitoiset
<samuel.pitoi...@gmail.com> wrote:
> At least, one shader buffer must be available for compute shaders.
>
> Signed-off-by: Samuel Pitoiset <samuel.pitoi...@gmail.com>
> ---
> src/gallium/include/pipe/p_state.h | 2 +-
> src/mesa/state_tracker/st_extensions.c | 6 ++++--
> 2 files changed, 5 insertions(+), 3 deletions(-)
>
> diff --git a/src/gallium/include/pipe/p_state.h
> b/src/gallium/include/pipe/p_state.h
> index 2e4d283..051856e 100644
> --- a/src/gallium/include/pipe/p_state.h
> +++ b/src/gallium/include/pipe/p_state.h
> @@ -61,7 +61,7 @@ extern "C" {
> #define PIPE_MAX_SHADER_INPUTS 80 /* 32 GENERIC + 32 PATCH + 16 others */
> #define PIPE_MAX_SHADER_OUTPUTS 80 /* 32 GENERIC + 32 PATCH + 16 others */
> #define PIPE_MAX_SHADER_SAMPLER_VIEWS 32
> -#define PIPE_MAX_SHADER_BUFFERS 32
> +#define PIPE_MAX_SHADER_BUFFERS 33
> #define PIPE_MAX_SHADER_IMAGES 32
> #define PIPE_MAX_TEXTURE_LEVELS 16
> #define PIPE_MAX_SO_BUFFERS 4
> diff --git a/src/mesa/state_tracker/st_extensions.c
> b/src/mesa/state_tracker/st_extensions.c
> index d066784..c198892 100644
> --- a/src/mesa/state_tracker/st_extensions.c
> +++ b/src/mesa/state_tracker/st_extensions.c
> @@ -219,8 +219,10 @@ void st_init_limits(struct pipe_screen *screen,
> pc->MaxUniformBlocks);
>
> pc->MaxAtomicCounters = MAX_ATOMIC_COUNTERS;
> - pc->MaxAtomicBuffers = screen->get_shader_param(
> - screen, sh, PIPE_SHADER_CAP_MAX_SHADER_BUFFERS) / 2;
> + pc->MaxAtomicBuffers =
> + _clamp(screen->get_shader_param(screen, sh,
> + PIPE_SHADER_CAP_MAX_SHADER_BUFFERS),
> + 0, PIPE_MAX_SHADER_BUFFERS - 1) / 2;
> pc->MaxShaderStorageBlocks = pc->MaxAtomicBuffers;
>
> /* Gallium doesn't really care about local vs. env parameters so use
> the
> --
> 2.6.4
>
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