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freedreno: implements get_sample_position

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Since 1285f71d3e landed, it needs to provide apps with proper sample
position for MSAA.

Currently no way to query this to hw, these are taken from blob driver.

Fixes: dEQP-GLES31.functional.texture.multisample.samples_#.sample_position
Signed-off-by: Rob Clark <robdclark@gmail.com>
This commit is contained in:
Hyunjun Ko 2018-11-07 11:30:31 +09:00 • committed by Rob Clark
parent 5973a4d0b7
commit 76945e4140
1 changed files with 45 additions and 0 deletions
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45
src/gallium/drivers/freedreno/freedreno_resource.c
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@ -1194,6 +1194,50 @@ fd_resource_screen_init(struct pipe_screen *pscreen)
screen->setup_slices = fd_setup_slices;
}
static void
fd_get_sample_position(struct pipe_context *context,
unsigned sample_count, unsigned sample_index,
float *pos_out)
{
/* The following is copied from nouveau/nv50 except for position
* values, which are taken from blob driver */
static const uint8_t pos1[1][2] = { { 0x8, 0x8 } };
static const uint8_t pos2[2][2] = {
{ 0xc, 0xc }, { 0x4, 0x4 } };
static const uint8_t pos4[4][2] = {
{ 0x6, 0x2 }, { 0xe, 0x6 },
{ 0x2, 0xa }, { 0xa, 0xe } };
/* TODO needs to be verified on supported hw */
static const uint8_t pos8[8][2] = {
{ 0x9, 0x5 }, { 0x7, 0xb },
{ 0xd, 0x9 }, { 0x5, 0x3 },
{ 0x3, 0xd }, { 0x1, 0x7 },
{ 0xb, 0xf }, { 0xf, 0x1 } };
const uint8_t (*ptr)[2];
switch (sample_count) {
case 1:
ptr = pos1;
break;
case 2:
ptr = pos2;
break;
case 4:
ptr = pos4;
break;
case 8:
ptr = pos8;
break;
default:
assert(0);
return;
}
pos_out[0] = ptr[sample_index][0] / 16.0f;
pos_out[1] = ptr[sample_index][1] / 16.0f;
}
void
fd_resource_context_init(struct pipe_context *pctx)
{
@ -1208,4 +1252,5 @@ fd_resource_context_init(struct pipe_context *pctx)
pctx->blit = fd_blit;
pctx->flush_resource = fd_flush_resource;
pctx->invalidate_resource = fd_invalidate_resource;
pctx->get_sample_position = fd_get_sample_position;
}