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panfrost: Implement get_sample_position 

Easy now that we have the table.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8774>
This commit is contained in:
Alyssa Rosenzweig 2021-01-29 16:40:51 -05:00
parent b01df1f9bf
commit 4086b8980d
3 changed files with 32 additions and 0 deletions
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12
src/gallium/drivers/panfrost/pan_context.c
View File

@ -1340,6 +1340,17 @@ panfrost_set_min_samples(struct pipe_context *pipe,
ctx->min_samples = min_samples;
}
static void
panfrost_get_sample_position(struct pipe_context *context,
unsigned sample_count,
unsigned sample_index,
float *out_value)
{
panfrost_query_sample_position(
panfrost_sample_pattern(sample_count),
sample_index,
out_value);
}
static void
panfrost_set_clip_state(struct pipe_context *pipe,
@ -1701,6 +1712,7 @@ panfrost_create_context(struct pipe_screen *screen, void *priv, unsigned flags)
gallium->set_sample_mask = panfrost_set_sample_mask;
gallium->set_min_samples = panfrost_set_min_samples;
gallium->get_sample_position = panfrost_get_sample_position;
gallium->set_clip_state = panfrost_set_clip_state;
gallium->set_viewport_states = panfrost_set_viewport_states;

5
src/panfrost/lib/pan_device.h
View File

@ -182,6 +182,11 @@ panfrost_upload_sample_positions(struct panfrost_device *dev);
mali_ptr
panfrost_sample_positions(struct panfrost_device *dev,
enum mali_sample_pattern pattern);
void
panfrost_query_sample_position(
enum mali_sample_pattern pattern,
unsigned sample_idx,
float *out);
static inline struct panfrost_bo *
pan_lookup_bo(struct panfrost_device *dev, uint32_t gem_handle)

15
src/panfrost/lib/pan_samples.c
View File

@ -144,3 +144,18 @@ panfrost_upload_sample_positions(struct panfrost_device *dev)
memcpy(dev->sample_positions->ptr.cpu, sample_position_lut,
sizeof(sample_position_lut));
}
/* CPU side LUT query, to implement glGetMultisamplefv */
void
panfrost_query_sample_position(
enum mali_sample_pattern pattern,
unsigned sample_idx,
float *out)
{
struct mali_sample_position pos =
sample_position_lut[pattern].positions[sample_idx];
out[0] = DECODE_FIXED_16(pos.x);
out[1] = DECODE_FIXED_16(pos.y);
}