Am 27.05.2015 um 13:47 schrieb Ilia Mirkin:
> On Wed, May 27, 2015 at 7:42 AM, Roland Scheidegger <srol...@vmware.com>
> wrote:
>> Am 27.05.2015 um 09:45 schrieb Dave Airlie:
>>> From: Dave Airlie <airl...@redhat.com>
>>>
>>> This is just for softpipe, llvmpipe won't work without
>>> some changes.
>>>
>>> Signed-off-by: Dave Airlie <airl...@redhat.com>
>>> ---
>>> src/gallium/auxiliary/draw/draw_gs.c | 47
>>> +++++++++++++++++++++-------------
>>> src/gallium/auxiliary/draw/draw_gs.h | 2 ++
>>> src/gallium/auxiliary/tgsi/tgsi_scan.c | 2 ++
>>> src/gallium/auxiliary/tgsi/tgsi_scan.h | 1 +
>>> 4 files changed, 34 insertions(+), 18 deletions(-)
>>>
>>> diff --git a/src/gallium/auxiliary/draw/draw_gs.c
>>> b/src/gallium/auxiliary/draw/draw_gs.c
>>> index 6375d41..755e527 100644
>>> --- a/src/gallium/auxiliary/draw/draw_gs.c
>>> +++ b/src/gallium/auxiliary/draw/draw_gs.c
>>> @@ -190,9 +190,15 @@ static void tgsi_gs_prepare(struct
>>> draw_geometry_shader *shader,
>>> const unsigned
>>> constants_size[PIPE_MAX_CONSTANT_BUFFERS])
>>> {
>>> struct tgsi_exec_machine *machine = shader->machine;
>>> -
>>> + int j;
>>> tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
>>> constants, constants_size);
>>> +
>>> + if (shader->info.uses_invocationid) {
>>> + unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INVOCATIONID];
>>> + for (j = 0; j < TGSI_QUAD_SIZE; j++)
>>> + machine->SystemValue[i].i[j] = shader->invocation_id;
>>> + }
>>> }
>>>
>>> static unsigned tgsi_gs_run(struct draw_geometry_shader *shader,
>>> @@ -555,7 +561,7 @@ int draw_geometry_shader_run(struct
>>> draw_geometry_shader *shader,
>>> * overflown vertices into some area where they won't harm anyone */
>>> unsigned total_verts_per_buffer = shader->primitive_boundary *
>>> num_in_primitives;
>>> -
>>> + unsigned invocation;
>>> //Assume at least one primitive
>>> max_out_prims = MAX2(max_out_prims, 1);
>>>
>>> @@ -564,7 +570,7 @@ int draw_geometry_shader_run(struct
>>> draw_geometry_shader *shader,
>>> output_verts->stride = output_verts->vertex_size;
>>> output_verts->verts =
>>> (struct vertex_header *)MALLOC(output_verts->vertex_size *
>>> - total_verts_per_buffer);
>>> + total_verts_per_buffer *
>>> shader->num_invocations);
>> This can't get very large, right?
>
> With ARB_gpu_shader5, it has to be at least 32. In mesa, it's always
> defined as 32.
>
I was more wondering if the buffer without the num_invocations mul was
already defined somewhere to not exceed some limit. Probably should be
ok though...
Roland
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