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softpipe: fix offset wrapping calculations (v2) 

Roland pointed out my previous attempt was lacking, so I enhanced the
texwrap piglit test, and tested them. This fixes the offset calculations
in a number of areas by adding the offset first, it also fixes the fastpaths,
which I forgot to address in the previous commit.

v2: try and avoid divides in most paths, the repeat mirror path
really was ugly no matter which way I went, so I left it having
the divide.
Also fix the gather lod calculation bug.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2015-05-27 11:11:06 +10:00
parent b95ec49e57
commit 065978d36b
1 changed files with 68 additions and 78 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

146
src/gallium/drivers/softpipe/sp_tex_sample.c
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@ -145,14 +145,14 @@ wrap_nearest_clamp(float s, unsigned size, int offset, int *icoord)
{
/* s limited to [0,1] */
/* i limited to [0,size-1] */
s *= size;
s += offset;
if (s <= 0.0F)
*icoord = 0;
else if (s >= 1.0F)
else if (s >= size)
*icoord = size - 1;
else
*icoord = util_ifloor(s * size);
if (offset)
*icoord = CLAMP(*icoord + offset, 0, size - 1);
*icoord = util_ifloor(s);
}
@ -161,17 +161,18 @@ wrap_nearest_clamp_to_edge(float s, unsigned size, int offset, int *icoord)
{
/* s limited to [min,max] */
/* i limited to [0, size-1] */
const float min = 1.0F / (2.0F * size);
const float max = 1.0F - min;
const float min = 0.5F;
const float max = (float)size - 0.5F;
s *= size;
s += offset;
if (s < min)
*icoord = 0;
else if (s > max)
*icoord = size - 1;
else
*icoord = util_ifloor(s * size);
if (offset)
*icoord = CLAMP(*icoord + offset, 0, size - 1);
*icoord = util_ifloor(s);
}
@ -180,26 +181,30 @@ wrap_nearest_clamp_to_border(float s, unsigned size, int offset, int *icoord)
{
/* s limited to [min,max] */
/* i limited to [-1, size] */
const float min = -1.0F / (2.0F * size);
const float max = 1.0F - min;
const float min = -0.5F;
const float max = size + 0.5F;
s *= size;
s += offset;
if (s <= min)
*icoord = -1;
else if (s >= max)
*icoord = size;
else
*icoord = util_ifloor(s * size);
if (offset)
*icoord = CLAMP(*icoord + offset, 0, size - 1);
*icoord = util_ifloor(s);
}
static void
wrap_nearest_mirror_repeat(float s, unsigned size, int offset, int *icoord)
{
const float min = 1.0F / (2.0F * size);
const float max = 1.0F - min;
const int flr = util_ifloor(s);
float u = frac(s);
int flr;
float u;
s += (float)offset / size;
flr = util_ifloor(s);
u = frac(s);
if (flr & 1)
u = 1.0F - u;
if (u < min)
@ -208,8 +213,6 @@ wrap_nearest_mirror_repeat(float s, unsigned size, int offset, int *icoord)
*icoord = size - 1;
else
*icoord = util_ifloor(u * size);
if (offset)
*icoord = CLAMP(*icoord + offset, 0, size - 1);
}
@ -218,15 +221,13 @@ wrap_nearest_mirror_clamp(float s, unsigned size, int offset, int *icoord)
{
/* s limited to [0,1] */
/* i limited to [0,size-1] */
const float u = fabsf(s);
const float u = fabsf(s * size + offset);
if (u <= 0.0F)
*icoord = 0;
else if (u >= 1.0F)
else if (u >= size)
*icoord = size - 1;
else
*icoord = util_ifloor(u * size);
if (offset)
*icoord = CLAMP(*icoord + offset, 0, size - 1);
*icoord = util_ifloor(u);
}
@ -235,36 +236,33 @@ wrap_nearest_mirror_clamp_to_edge(float s, unsigned size, int offset, int *icoor
{
/* s limited to [min,max] */
/* i limited to [0, size-1] */
const float min = 1.0F / (2.0F * size);
const float max = 1.0F - min;
const float u = fabsf(s);
const float min = 0.5F;
const float max = (float)size - 0.5F;
const float u = fabsf(s * size + offset);
if (u < min)
*icoord = 0;
else if (u > max)
*icoord = size - 1;
else
*icoord = util_ifloor(u * size);
if (offset)
*icoord = CLAMP(*icoord + offset, 0, size - 1);
*icoord = util_ifloor(u);
}
static void
wrap_nearest_mirror_clamp_to_border(float s, unsigned size, int offset, int *icoord)
{
/* s limited to [min,max] */
/* i limited to [0, size-1] */
const float min = -1.0F / (2.0F * size);
const float max = 1.0F - min;
const float u = fabsf(s);
/* u limited to [-0.5, size-0.5] */
const float min = -0.5F;
const float max = (float)size + 0.5F;
const float u = fabsf(s * size + offset);
if (u < min)
*icoord = -1;
else if (u > max)
*icoord = size;
else
*icoord = util_ifloor(u * size);
if (offset)
*icoord = CLAMP(*icoord + offset, 0, size - 1);
*icoord = util_ifloor(u);
}
@ -293,14 +291,11 @@ static void
wrap_linear_clamp(float s, unsigned size, int offset,
int *icoord0, int *icoord1, float *w)
{
float u = CLAMP(s, 0.0F, 1.0F);
u = u * size - 0.5f;
float u = CLAMP(s * size + offset, 0.0F, (float)size);
u = u - 0.5f;
*icoord0 = util_ifloor(u);
*icoord1 = *icoord0 + 1;
if (offset) {
*icoord0 = CLAMP(*icoord0 + offset, 0, size - 1);
*icoord1 = CLAMP(*icoord1 + offset, 0, size - 1);
}
*w = frac(u);
}
@ -309,18 +304,14 @@ static void
wrap_linear_clamp_to_edge(float s, unsigned size, int offset,
int *icoord0, int *icoord1, float *w)
{
float u = CLAMP(s, 0.0F, 1.0F);
u = u * size - 0.5f;
float u = CLAMP(s * size + offset, 0.0F, (float)size);
u = u - 0.5f;
*icoord0 = util_ifloor(u);
*icoord1 = *icoord0 + 1;
if (*icoord0 < 0)
*icoord0 = 0;
if (*icoord1 >= (int) size)
*icoord1 = size - 1;
if (offset) {
*icoord0 = CLAMP(*icoord0 + offset, 0, size - 1);
*icoord1 = CLAMP(*icoord1 + offset, 0, size - 1);
}
*w = frac(u);
}
@ -329,10 +320,10 @@ static void
wrap_linear_clamp_to_border(float s, unsigned size, int offset,
int *icoord0, int *icoord1, float *w)
{
const float min = -1.0F / (2.0F * size);
const float max = 1.0F - min;
float u = CLAMP(s, min, max);
u = u * size - 0.5f;
const float min = -0.5F;
const float max = (float)size + 0.5F;
float u = CLAMP(s * size + offset, min, max);
u = u - 0.5f;
*icoord0 = util_ifloor(u);
*icoord1 = *icoord0 + 1;
*w = frac(u);
@ -343,8 +334,12 @@ static void
wrap_linear_mirror_repeat(float s, unsigned size, int offset,
int *icoord0, int *icoord1, float *w)
{
const int flr = util_ifloor(s);
float u = frac(s);
int flr;
float u;
s += (float)offset / size;
flr = util_ifloor(s);
u = frac(s);
if (flr & 1)
u = 1.0F - u;
u = u * size - 0.5F;
@ -362,11 +357,9 @@ static void
wrap_linear_mirror_clamp(float s, unsigned size, int offset,
int *icoord0, int *icoord1, float *w)
{
float u = fabsf(s);
if (u >= 1.0F)
float u = fabsf(s * size + offset);
if (u >= size)
u = (float) size;
else
u *= size;
u -= 0.5F;
*icoord0 = util_ifloor(u);
*icoord1 = *icoord0 + 1;
@ -378,11 +371,9 @@ static void
wrap_linear_mirror_clamp_to_edge(float s, unsigned size, int offset,
int *icoord0, int *icoord1, float *w)
{
float u = fabsf(s);
if (u >= 1.0F)
float u = fabsf(s * size + offset);
if (u >= size)
u = (float) size;
else
u *= size;
u -= 0.5F;
*icoord0 = util_ifloor(u);
*icoord1 = *icoord0 + 1;
@ -398,15 +389,13 @@ static void
wrap_linear_mirror_clamp_to_border(float s, unsigned size, int offset,
int *icoord0, int *icoord1, float *w)
{
const float min = -1.0F / (2.0F * size);
const float max = 1.0F - min;
float u = fabsf(s);
const float min = -0.5F;
const float max = size + 0.5F;
float u = fabsf(s * size + offset);
if (u <= min)
u = min * size;
u = min;
else if (u >= max)
u = max * size;
else
u *= size;
u = max;
u -= 0.5F;
*icoord0 = util_ifloor(u);
*icoord1 = *icoord0 + 1;
@ -1040,8 +1029,8 @@ img_filter_2d_linear_repeat_POT(struct sp_sampler_view *sp_sview,
union tex_tile_address addr;
int c;
float u = args->s * xpot - 0.5F;
float v = args->t * ypot - 0.5F;
float u = (args->s * xpot - 0.5F) + args->offset[0];
float v = (args->t * ypot - 0.5F) + args->offset[1];
int uflr = util_ifloor(u);
int vflr = util_ifloor(v);
@ -1093,8 +1082,8 @@ img_filter_2d_nearest_repeat_POT(struct sp_sampler_view *sp_sview,
union tex_tile_address addr;
int c;
float u = args->s * xpot;
float v = args->t * ypot;
float u = args->s * xpot + args->offset[0];
float v = args->t * ypot + args->offset[1];
int uflr = util_ifloor(u);
int vflr = util_ifloor(v);
@ -1126,8 +1115,8 @@ img_filter_2d_nearest_clamp_POT(struct sp_sampler_view *sp_sview,
union tex_tile_address addr;
int c;
float u = args->s * xpot;
float v = args->t * ypot;
float u = args->s * xpot + args->offset[0];
float v = args->t * ypot + args->offset[1];
int x0, y0;
const float *out;
@ -1889,7 +1878,6 @@ compute_lambda_lod(struct sp_sampler_view *sp_sview,
switch (control) {
case tgsi_sampler_lod_none:
case tgsi_sampler_gather:
/* XXX FIXME */
case tgsi_sampler_derivs_explicit:
lambda = sp_sview->compute_lambda(sp_sview, s, t, p) + lod_bias;
@ -1908,6 +1896,7 @@ compute_lambda_lod(struct sp_sampler_view *sp_sview,
}
break;
case tgsi_sampler_lod_zero:
case tgsi_sampler_gather:
/* this is all static state in the sampler really need clamp here? */
lod[0] = lod[1] = lod[2] = lod[3] = CLAMP(lod_bias, min_lod, max_lod);
break;
@ -2472,6 +2461,7 @@ mip_filter_linear_2d_linear_repeat_POT(
args.t = t[j];
args.p = p[j];
args.face_id = sp_sview->faces[j];
args.offset = filt_args->offset;
args.gather_only = filt_args->control == tgsi_sampler_gather;
if ((unsigned)level0 >= psview->u.tex.last_level) {
if (level0 < 0)