Signed-off-by: Rhys Perry <pendingchao...@gmail.com>
---
src/mesa/state_tracker/st_atom_framebuffer.c | 64 ++++++++++++++++++++++++++++
src/mesa/state_tracker/st_cb_msaa.c | 22 ++++++++++
src/mesa/state_tracker/st_extensions.c | 1 +
3 files changed, 87 insertions(+)
diff --git a/src/mesa/state_tracker/st_atom_framebuffer.c
b/src/mesa/state_tracker/st_atom_framebuffer.c
index 3ef3ff34a9..bb5f02125f 100644
--- a/src/mesa/state_tracker/st_atom_framebuffer.c
+++ b/src/mesa/state_tracker/st_atom_framebuffer.c
@@ -102,6 +102,68 @@ framebuffer_quantize_num_samples(struct st_context *st,
unsigned num_samples)
return quantized_samples;
}
+/**
+ * Update the pipe_context's sample location state
+ */
+static void
+update_sample_locations(struct st_context *st,
+ const struct pipe_framebuffer_state *fb_state)
+{
+ struct pipe_sample_locations_state locations;
+ struct gl_framebuffer *fb = st->ctx->DrawBuffer;
+
+ if (!st->ctx->Extensions.ARB_sample_locations)
+ return;
+
+ locations.enabled = fb->ProgrammableSampleLocations;
+ if (locations.enabled) {
+ unsigned grid_width, grid_height;
+ int samples = _mesa_geometric_samples(fb);
+ int pixel, sample_index;
+ bool sample_location_pixel_grid = fb->SampleLocationPixelGrid;
+
+ st->pipe->get_sample_pixel_grid(st->pipe, samples, &grid_width,
&grid_height);
+
+ /**
+ * when a dimension is greater than MAX_SAMPLE_LOCATION_GRID_SIZE,
+ * st->ctx->Driver.GetSamplePixelGrid() returns 1 for both dimensions.
+ */
+ if (grid_width>MAX_SAMPLE_LOCATION_GRID_SIZE ||
+ grid_height>MAX_SAMPLE_LOCATION_GRID_SIZE)
+ sample_location_pixel_grid = false;
+
+ for (pixel = 0; pixel < grid_width * grid_height; pixel++) {
+ for (sample_index = 0; sample_index < samples; sample_index++) {
+ int table_index = sample_index;
+ float x = 0.5f, y = 0.5f;
+ uint8_t loc;
+ if (sample_location_pixel_grid)
+ table_index = pixel * samples + sample_index;
+ if (fb->SampleLocationTable) {
+ x = fb->SampleLocationTable[table_index*2];
+ y = fb->SampleLocationTable[table_index*2+1];
+ }
+ if (st->state.fb_orientation == Y_0_BOTTOM)
+ y = 1.0 - y;
+
+ loc = roundf(CLAMP(x*16.0f, 0.0f, 15.0f));
+ loc |= (int)roundf(CLAMP(y*16.0f, 0.0f, 15.0f)) << 4;
+ locations.locations[pixel*samples+sample_index] = loc;
+ }
+ }
+
+ util_sample_locations_flip_y(st->pipe, &locations, fb_state);
+ } else {
+ /**
+ * util_sample_locations_flip_y() initializes unused data to 0x88, so
+ * this memset is not useful when locations.enabled is true.
+ */
+ memset(locations.locations, 0x88, sizeof(locations.locations));
+ }
+
+ cso_set_sample_locations(st->cso_context, &locations);
+}
+
/**
* Update framebuffer state (color, depth, stencil, etc. buffers)
*/
@@ -209,4 +271,6 @@ st_update_framebuffer_state( struct st_context *st )
st->state.fb_num_samples = util_framebuffer_get_num_samples(&framebuffer);
st->state.fb_num_layers = util_framebuffer_get_num_layers(&framebuffer);
st->state.fb_num_cb = framebuffer.nr_cbufs;
+
+ update_sample_locations(st, &framebuffer);
}
diff --git a/src/mesa/state_tracker/st_cb_msaa.c
b/src/mesa/state_tracker/st_cb_msaa.c
index 7f1b4fde91..092e74d28e 100644
--- a/src/mesa/state_tracker/st_cb_msaa.c
+++ b/src/mesa/state_tracker/st_cb_msaa.c
@@ -56,8 +56,30 @@ st_GetSamplePosition(struct gl_context *ctx,
}
+static void
+st_GetProgrammableSampleCaps(struct gl_context *ctx, struct gl_framebuffer *fb,
+ GLuint *outBits, GLuint *outWidth, GLuint
*outHeight)
+{
+ struct st_context *st = st_context(ctx);
+
+ st_validate_state(st, ST_PIPELINE_UPDATE_FRAMEBUFFER);
+
+ if (st->pipe->get_sample_pixel_grid)
+ st->pipe->get_sample_pixel_grid(st->pipe, _mesa_geometric_samples(fb),
+ outWidth, outHeight);
+ *outBits = 4;
+
+ /* We could handle this better in some circumstances,
+ * but it's not really an issue */
+ if (*outWidth>MAX_SAMPLE_LOCATION_GRID_SIZE ||
*outHeight>MAX_SAMPLE_LOCATION_GRID_SIZE) {
+ *outWidth = 1;
+ *outHeight = 1;
+ }
+}
+
void
st_init_msaa_functions(struct dd_function_table *functions)
{
functions->GetSamplePosition = st_GetSamplePosition;
+ functions->GetProgrammableSampleCaps = st_GetProgrammableSampleCaps;
}
diff --git a/src/mesa/state_tracker/st_extensions.c
b/src/mesa/state_tracker/st_extensions.c
index 0dc8adb262..b74fb63cef 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -636,6 +636,7 @@ void st_init_extensions(struct pipe_screen *screen,
{ o(ARB_query_buffer_object), PIPE_CAP_QUERY_BUFFER_OBJECT
},
{ o(ARB_robust_buffer_access_behavior),
PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR },
{ o(ARB_sample_shading), PIPE_CAP_SAMPLE_SHADING
},
+ { o(ARB_sample_locations),
PIPE_CAP_PROGRAMMABLE_SAMPLE_LOCATIONS },
{ o(ARB_seamless_cube_map), PIPE_CAP_SEAMLESS_CUBE_MAP
},
{ o(ARB_shader_ballot), PIPE_CAP_TGSI_BALLOT
},
{ o(ARB_shader_clock), PIPE_CAP_TGSI_CLOCK
},
--
2.14.3
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