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iris: implement get_sample_position

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Fixes arb_sample_shading/builtin-gl-sample-position
This commit is contained in:
Kenneth Graunke 2018-08-20 23:37:13 -07:00
parent 7ed4b80233
commit 701b47a197
1 changed files with 37 additions and 0 deletions
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37
src/gallium/drivers/iris/iris_context.c
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@ -32,6 +32,7 @@
#include "iris_context.h"
#include "iris_resource.h"
#include "iris_screen.h"
#include "common/gen_sample_positions.h"
static void
iris_flush(struct pipe_context *ctx,
@ -75,6 +76,41 @@ iris_set_debug_callback(struct pipe_context *ctx,
memset(&ice->dbg, 0, sizeof(ice->dbg));
}
static void
iris_get_sample_position(struct pipe_context *ctx,
unsigned sample_count,
unsigned sample_index,
float *out_value)
{
union {
struct {
float x[16];
float y[16];
} a;
struct {
float _0XOffset, _1XOffset, _2XOffset, _3XOffset,
_4XOffset, _5XOffset, _6XOffset, _7XOffset,
_8XOffset, _9XOffset, _10XOffset, _11XOffset,
_12XOffset, _13XOffset, _14XOffset, _15XOffset;
float _0YOffset, _1YOffset, _2YOffset, _3YOffset,
_4YOffset, _5YOffset, _6YOffset, _7YOffset,
_8YOffset, _9YOffset, _10YOffset, _11YOffset,
_12YOffset, _13YOffset, _14YOffset, _15YOffset;
} v;
} u;
switch (sample_count) {
case 1: GEN_SAMPLE_POS_1X(u.v._); break;
case 2: GEN_SAMPLE_POS_2X(u.v._); break;
case 4: GEN_SAMPLE_POS_4X(u.v._); break;
case 8: GEN_SAMPLE_POS_8X(u.v._); break;
case 16: GEN_SAMPLE_POS_16X(u.v._); break;
default: unreachable("invalid sample count");
}
out_value[0] = u.a.x[sample_index];
out_value[1] = u.a.y[sample_index];
}
/**
* Destroy a context, freeing any associated memory.
*/
@ -140,6 +176,7 @@ iris_create_context(struct pipe_screen *pscreen, void *priv, unsigned flags)
ctx->destroy = iris_destroy_context;
ctx->flush = iris_flush;
ctx->set_debug_callback = iris_set_debug_callback;
ctx->get_sample_position = iris_get_sample_position;
ice->shaders.urb_size = devinfo->urb.size;