The sample positions can be found in r600_emit_msaa_state,
evergreen_emit_msaa_state, and cayman_emit_msaa_state, though
extracting them from the arrays might not be so straightforward.
Marek
On Sun, Mar 3, 2013 at 9:27 PM, Dave Airlie <airl...@gmail.com> wrote:
> From: Dave Airlie <airl...@redhat.com>
>
> get sample position is most definitely wrong, need to find out what
> sample positions the hardware uses.
>
> Signed-off-by: Dave Airlie <airl...@redhat.com>
> ---
> src/gallium/drivers/r600/r600_shader.c | 1 +
> src/gallium/drivers/r600/r600_state_common.c | 35
> ++++++++++++++++++++++++++++
> 2 files changed, 36 insertions(+)
>
> diff --git a/src/gallium/drivers/r600/r600_shader.c
> b/src/gallium/drivers/r600/r600_shader.c
> index 8642463..5fd3f83 100644
> --- a/src/gallium/drivers/r600/r600_shader.c
> +++ b/src/gallium/drivers/r600/r600_shader.c
> @@ -4705,6 +4705,7 @@ static int tgsi_tex(struct r600_shader_ctx *ctx)
> tex.src_sel_z = tex.src_sel_y;
> }
> } else if (inst->Texture.Texture == TGSI_TEXTURE_2D_ARRAY ||
> + inst->Texture.Texture == TGSI_TEXTURE_2D_ARRAY_MSAA ||
> inst->Texture.Texture == TGSI_TEXTURE_SHADOW2D_ARRAY ||
> ((inst->Texture.Texture == TGSI_TEXTURE_CUBE_ARRAY ||
> inst->Texture.Texture == TGSI_TEXTURE_SHADOWCUBE_ARRAY) &&
> diff --git a/src/gallium/drivers/r600/r600_state_common.c
> b/src/gallium/drivers/r600/r600_state_common.c
> index 22ac846..8c8b665 100644
> --- a/src/gallium/drivers/r600/r600_state_common.c
> +++ b/src/gallium/drivers/r600/r600_state_common.c
> @@ -1748,6 +1748,39 @@ bool sampler_state_needs_border_color(const struct
> pipe_sampler_state *state)
> wrap_mode_uses_border_color(state->wrap_r, linear_filter));
> }
>
> +static void r600_get_sample_position(struct pipe_context *ctx,
> + int max_sample,
> + unsigned sample_index,
> + float *out_value)
> +{
> + switch (max_sample) {
> + case 1:
> + default:
> + out_value[0] = out_value[1] = 0.5;
> + break;
> + case 4:
> + switch (sample_index) {
> + case 0:
> + out_value[0] = 0.25;
> + out_value[1] = 0.25;
> + break;
> + case 1:
> + out_value[0] = 0.25;
> + out_value[1] = 0.75;
> + break;
> + case 2:
> + out_value[0] = 0.75;
> + out_value[1] = 0.25;
> + break;
> + case 3:
> + out_value[0] = 0.75;
> + out_value[1] = 0.75;
> + break;
> + }
> + break;
> + }
> +}
> +
> /* keep this at the end of this file, please */
> void r600_init_common_state_functions(struct r600_context *rctx)
> {
> @@ -1785,6 +1818,8 @@ void r600_init_common_state_functions(struct
> r600_context *rctx)
> rctx->context.stream_output_target_destroy = r600_so_target_destroy;
> rctx->context.set_stream_output_targets = r600_set_streamout_targets;
> rctx->context.draw_vbo = r600_draw_vbo;
> +
> + rctx->context.get_sample_position = r600_get_sample_position;
> }
>
> #if R600_TRACE_CS
> --
> 1.8.1.2
>
> _______________________________________________
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> mesa-dev@lists.freedesktop.org
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