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path: root/src/gallium/drivers/llvmpipe/lp_setup.c
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Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_setup.c')
-rw-r--r--src/gallium/drivers/llvmpipe/lp_setup.c362
1 files changed, 224 insertions, 138 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_setup.c b/src/gallium/drivers/llvmpipe/lp_setup.c
index c81a2b7ca5..e62412f0e5 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup.c
@@ -92,7 +92,7 @@ struct setup_context {
struct quad_header *quad_ptrs[MAX_QUADS];
unsigned count;
- struct tgsi_interp_coef coef[PIPE_MAX_SHADER_INPUTS];
+ struct quad_interp_coef coef;
struct tgsi_interp_coef posCoef; /* For Z, W */
struct {
@@ -383,34 +383,11 @@ static boolean setup_sort_vertices( struct setup_context *setup,
/**
- * Compute a0 for a constant-valued coefficient (GL_FLAT shading).
- * The value value comes from vertex[slot][i].
- * The result will be put into setup->coef[slot].a0[i].
- * \param slot which attribute slot
- * \param i which component of the slot (0..3)
- */
-static void const_coeff( struct setup_context *setup,
- struct tgsi_interp_coef *coef,
- uint vertSlot, uint i)
-{
- assert(i <= 3);
-
- coef->dadx[i] = 0;
- coef->dady[i] = 0;
-
- /* need provoking vertex info!
- */
- coef->a0[i] = setup->vprovoke[vertSlot][i];
-}
-
-
-/**
* Compute a0, dadx and dady for a linearly interpolated coefficient,
* for a triangle.
*/
-static void tri_linear_coeff( struct setup_context *setup,
- struct tgsi_interp_coef *coef,
- uint vertSlot, uint i)
+static void tri_pos_coeff( struct setup_context *setup,
+ uint vertSlot, unsigned i)
{
float botda = setup->vmid[vertSlot][i] - setup->vmin[vertSlot][i];
float majda = setup->vmax[vertSlot][i] - setup->vmin[vertSlot][i];
@@ -421,8 +398,8 @@ static void tri_linear_coeff( struct setup_context *setup,
assert(i <= 3);
- coef->dadx[i] = dadx;
- coef->dady[i] = dady;
+ setup->posCoef.dadx[i] = dadx;
+ setup->posCoef.dady[i] = dady;
/* calculate a0 as the value which would be sampled for the
* fragment at (0,0), taking into account that we want to sample at
@@ -436,21 +413,112 @@ static void tri_linear_coeff( struct setup_context *setup,
* to define a0 as the sample at a pixel center somewhere near vmin
* instead - i'll switch to this later.
*/
- coef->a0[i] = (setup->vmin[vertSlot][i] -
- (dadx * (setup->vmin[0][0] - 0.5f) +
- dady * (setup->vmin[0][1] - 0.5f)));
+ setup->posCoef.a0[i] = (setup->vmin[vertSlot][i] -
+ (dadx * (setup->vmin[0][0] - 0.5f) +
+ dady * (setup->vmin[0][1] - 0.5f)));
/*
debug_printf("attr[%d].%c: %f dx:%f dy:%f\n",
- slot, "xyzw"[i],
- setup->coef[slot].a0[i],
- setup->coef[slot].dadx[i],
- setup->coef[slot].dady[i]);
+ slot, "xyzw"[i],
+ setup->coef[slot].a0[i],
+ setup->coef[slot].dadx[i],
+ setup->coef[slot].dady[i]);
*/
}
/**
+ * Compute a0 for a constant-valued coefficient (GL_FLAT shading).
+ * The value value comes from vertex[slot][i].
+ * The result will be put into setup->coef[slot].a0[i].
+ * \param slot which attribute slot
+ * \param i which component of the slot (0..3)
+ */
+static void const_pos_coeff( struct setup_context *setup,
+ uint vertSlot, unsigned i)
+{
+ setup->posCoef.dadx[i] = 0;
+ setup->posCoef.dady[i] = 0;
+
+ /* need provoking vertex info!
+ */
+ setup->posCoef.a0[i] = setup->vprovoke[vertSlot][i];
+}
+
+
+/**
+ * Compute a0 for a constant-valued coefficient (GL_FLAT shading).
+ * The value value comes from vertex[slot][i].
+ * The result will be put into setup->coef[slot].a0[i].
+ * \param slot which attribute slot
+ * \param i which component of the slot (0..3)
+ */
+static void const_coeff( struct setup_context *setup,
+ unsigned attrib,
+ uint vertSlot)
+{
+ unsigned i;
+ for (i = 0; i < NUM_CHANNELS; ++i) {
+ setup->coef.dadx[attrib][i] = 0;
+ setup->coef.dady[attrib][i] = 0;
+
+ /* need provoking vertex info!
+ */
+ setup->coef.a0[attrib][i] = setup->vprovoke[vertSlot][i];
+ }
+}
+
+
+/**
+ * Compute a0, dadx and dady for a linearly interpolated coefficient,
+ * for a triangle.
+ */
+static void tri_linear_coeff( struct setup_context *setup,
+ unsigned attrib,
+ uint vertSlot)
+{
+ unsigned i;
+ for (i = 0; i < NUM_CHANNELS; ++i) {
+ float botda = setup->vmid[vertSlot][i] - setup->vmin[vertSlot][i];
+ float majda = setup->vmax[vertSlot][i] - setup->vmin[vertSlot][i];
+ float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
+ float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
+ float dadx = a * setup->oneoverarea;
+ float dady = b * setup->oneoverarea;
+
+ assert(i <= 3);
+
+ setup->coef.dadx[attrib][i] = dadx;
+ setup->coef.dady[attrib][i] = dady;
+
+ /* calculate a0 as the value which would be sampled for the
+ * fragment at (0,0), taking into account that we want to sample at
+ * pixel centers, in other words (0.5, 0.5).
+ *
+ * this is neat but unfortunately not a good way to do things for
+ * triangles with very large values of dadx or dady as it will
+ * result in the subtraction and re-addition from a0 of a very
+ * large number, which means we'll end up loosing a lot of the
+ * fractional bits and precision from a0. the way to fix this is
+ * to define a0 as the sample at a pixel center somewhere near vmin
+ * instead - i'll switch to this later.
+ */
+ setup->coef.a0[attrib][i] = (setup->vmin[vertSlot][i] -
+ (dadx * (setup->vmin[0][0] - 0.5f) +
+ dady * (setup->vmin[0][1] - 0.5f)));
+
+ /*
+ debug_printf("attr[%d].%c: %f dx:%f dy:%f\n",
+ slot, "xyzw"[i],
+ setup->coef[slot].a0[i],
+ setup->coef[slot].dadx[i],
+ setup->coef[slot].dady[i]);
+ */
+ }
+}
+
+
+/**
* Compute a0, dadx and dady for a perspective-corrected interpolant,
* for a triangle.
* We basically multiply the vertex value by 1/w before computing
@@ -459,35 +527,38 @@ static void tri_linear_coeff( struct setup_context *setup,
* divide the interpolated value by the interpolated W at that fragment.
*/
static void tri_persp_coeff( struct setup_context *setup,
- struct tgsi_interp_coef *coef,
- uint vertSlot, uint i)
+ unsigned attrib,
+ uint vertSlot)
{
- /* premultiply by 1/w (v[0][3] is always W):
- */
- float mina = setup->vmin[vertSlot][i] * setup->vmin[0][3];
- float mida = setup->vmid[vertSlot][i] * setup->vmid[0][3];
- float maxa = setup->vmax[vertSlot][i] * setup->vmax[0][3];
- float botda = mida - mina;
- float majda = maxa - mina;
- float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
- float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
- float dadx = a * setup->oneoverarea;
- float dady = b * setup->oneoverarea;
+ unsigned i;
+ for (i = 0; i < NUM_CHANNELS; ++i) {
+ /* premultiply by 1/w (v[0][3] is always W):
+ */
+ float mina = setup->vmin[vertSlot][i] * setup->vmin[0][3];
+ float mida = setup->vmid[vertSlot][i] * setup->vmid[0][3];
+ float maxa = setup->vmax[vertSlot][i] * setup->vmax[0][3];
+ float botda = mida - mina;
+ float majda = maxa - mina;
+ float a = setup->ebot.dy * majda - botda * setup->emaj.dy;
+ float b = setup->emaj.dx * botda - majda * setup->ebot.dx;
+ float dadx = a * setup->oneoverarea;
+ float dady = b * setup->oneoverarea;
- /*
- debug_printf("tri persp %d,%d: %f %f %f\n", vertSlot, i,
- setup->vmin[vertSlot][i],
- setup->vmid[vertSlot][i],
- setup->vmax[vertSlot][i]
- );
- */
- assert(i <= 3);
+ /*
+ debug_printf("tri persp %d,%d: %f %f %f\n", vertSlot, i,
+ setup->vmin[vertSlot][i],
+ setup->vmid[vertSlot][i],
+ setup->vmax[vertSlot][i]
+ );
+ */
+ assert(i <= 3);
- coef->dadx[i] = dadx;
- coef->dady[i] = dady;
- coef->a0[i] = (mina -
- (dadx * (setup->vmin[0][0] - 0.5f) +
- dady * (setup->vmin[0][1] - 0.5f)));
+ setup->coef.dadx[attrib][i] = dadx;
+ setup->coef.dady[attrib][i] = dady;
+ setup->coef.a0[attrib][i] = (mina -
+ (dadx * (setup->vmin[0][0] - 0.5f) +
+ dady * (setup->vmin[0][1] - 0.5f)));
+ }
}
@@ -501,21 +572,21 @@ static void
setup_fragcoord_coeff(struct setup_context *setup, uint slot)
{
/*X*/
- setup->coef[slot].a0[0] = 0;
- setup->coef[slot].dadx[0] = 1.0;
- setup->coef[slot].dady[0] = 0.0;
+ setup->coef.a0[slot][0] = 0;
+ setup->coef.dadx[slot][0] = 1.0;
+ setup->coef.dady[slot][0] = 0.0;
/*Y*/
- setup->coef[slot].a0[1] = 0.0;
- setup->coef[slot].dadx[1] = 0.0;
- setup->coef[slot].dady[1] = 1.0;
+ setup->coef.a0[slot][1] = 0.0;
+ setup->coef.dadx[slot][1] = 0.0;
+ setup->coef.dady[slot][1] = 1.0;
/*Z*/
- setup->coef[slot].a0[2] = setup->posCoef.a0[2];
- setup->coef[slot].dadx[2] = setup->posCoef.dadx[2];
- setup->coef[slot].dady[2] = setup->posCoef.dady[2];
+ setup->coef.a0[slot][2] = setup->posCoef.a0[2];
+ setup->coef.dadx[slot][2] = setup->posCoef.dadx[2];
+ setup->coef.dady[slot][2] = setup->posCoef.dady[2];
/*W*/
- setup->coef[slot].a0[3] = setup->posCoef.a0[3];
- setup->coef[slot].dadx[3] = setup->posCoef.dadx[3];
- setup->coef[slot].dady[3] = setup->posCoef.dady[3];
+ setup->coef.a0[slot][3] = setup->posCoef.a0[3];
+ setup->coef.dadx[slot][3] = setup->posCoef.dadx[3];
+ setup->coef.dady[slot][3] = setup->posCoef.dady[3];
}
@@ -533,27 +604,23 @@ static void setup_tri_coefficients( struct setup_context *setup )
/* z and w are done by linear interpolation:
*/
- tri_linear_coeff(setup, &setup->posCoef, 0, 2);
- tri_linear_coeff(setup, &setup->posCoef, 0, 3);
+ tri_pos_coeff(setup, 0, 2);
+ tri_pos_coeff(setup, 0, 3);
/* setup interpolation for all the remaining attributes:
*/
for (fragSlot = 0; fragSlot < lpfs->info.num_inputs; fragSlot++) {
const uint vertSlot = vinfo->attrib[fragSlot].src_index;
- uint j;
switch (vinfo->attrib[fragSlot].interp_mode) {
case INTERP_CONSTANT:
- for (j = 0; j < NUM_CHANNELS; j++)
- const_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
+ const_coeff(setup, fragSlot, vertSlot);
break;
case INTERP_LINEAR:
- for (j = 0; j < NUM_CHANNELS; j++)
- tri_linear_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
+ tri_linear_coeff(setup, fragSlot, vertSlot);
break;
case INTERP_PERSPECTIVE:
- for (j = 0; j < NUM_CHANNELS; j++)
- tri_persp_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
+ tri_persp_coeff(setup, fragSlot, vertSlot);
break;
case INTERP_POS:
setup_fragcoord_coeff(setup, fragSlot);
@@ -563,9 +630,9 @@ static void setup_tri_coefficients( struct setup_context *setup )
}
if (lpfs->info.input_semantic_name[fragSlot] == TGSI_SEMANTIC_FACE) {
- setup->coef[fragSlot].a0[0] = 1.0f - setup->facing;
- setup->coef[fragSlot].dadx[0] = 0.0;
- setup->coef[fragSlot].dady[0] = 0.0;
+ setup->coef.a0[fragSlot][0] = 1.0f - setup->facing;
+ setup->coef.dadx[fragSlot][0] = 0.0;
+ setup->coef.dady[fragSlot][0] = 0.0;
}
}
}
@@ -769,18 +836,40 @@ void setup_tri( struct setup_context *setup,
* for a line.
*/
static void
-line_linear_coeff(const struct setup_context *setup,
- struct tgsi_interp_coef *coef,
- uint vertSlot, uint i)
+linear_pos_coeff(struct setup_context *setup,
+ uint vertSlot, uint i)
{
const float da = setup->vmax[vertSlot][i] - setup->vmin[vertSlot][i];
const float dadx = da * setup->emaj.dx * setup->oneoverarea;
const float dady = da * setup->emaj.dy * setup->oneoverarea;
- coef->dadx[i] = dadx;
- coef->dady[i] = dady;
- coef->a0[i] = (setup->vmin[vertSlot][i] -
- (dadx * (setup->vmin[0][0] - 0.5f) +
- dady * (setup->vmin[0][1] - 0.5f)));
+ setup->posCoef.dadx[i] = dadx;
+ setup->posCoef.dady[i] = dady;
+ setup->posCoef.a0[i] = (setup->vmin[vertSlot][i] -
+ (dadx * (setup->vmin[0][0] - 0.5f) +
+ dady * (setup->vmin[0][1] - 0.5f)));
+}
+
+
+/**
+ * Compute a0, dadx and dady for a linearly interpolated coefficient,
+ * for a line.
+ */
+static void
+line_linear_coeff(struct setup_context *setup,
+ unsigned attrib,
+ uint vertSlot)
+{
+ unsigned i;
+ for (i = 0; i < NUM_CHANNELS; ++i) {
+ const float da = setup->vmax[vertSlot][i] - setup->vmin[vertSlot][i];
+ const float dadx = da * setup->emaj.dx * setup->oneoverarea;
+ const float dady = da * setup->emaj.dy * setup->oneoverarea;
+ setup->coef.dadx[attrib][i] = dadx;
+ setup->coef.dady[attrib][i] = dady;
+ setup->coef.a0[attrib][i] = (setup->vmin[vertSlot][i] -
+ (dadx * (setup->vmin[0][0] - 0.5f) +
+ dady * (setup->vmin[0][1] - 0.5f)));
+ }
}
@@ -789,21 +878,24 @@ line_linear_coeff(const struct setup_context *setup,
* for a line.
*/
static void
-line_persp_coeff(const struct setup_context *setup,
- struct tgsi_interp_coef *coef,
- uint vertSlot, uint i)
+line_persp_coeff(struct setup_context *setup,
+ unsigned attrib,
+ uint vertSlot)
{
- /* XXX double-check/verify this arithmetic */
- const float a0 = setup->vmin[vertSlot][i] * setup->vmin[0][3];
- const float a1 = setup->vmax[vertSlot][i] * setup->vmax[0][3];
- const float da = a1 - a0;
- const float dadx = da * setup->emaj.dx * setup->oneoverarea;
- const float dady = da * setup->emaj.dy * setup->oneoverarea;
- coef->dadx[i] = dadx;
- coef->dady[i] = dady;
- coef->a0[i] = (setup->vmin[vertSlot][i] -
- (dadx * (setup->vmin[0][0] - 0.5f) +
- dady * (setup->vmin[0][1] - 0.5f)));
+ unsigned i;
+ for (i = 0; i < NUM_CHANNELS; ++i) {
+ /* XXX double-check/verify this arithmetic */
+ const float a0 = setup->vmin[vertSlot][i] * setup->vmin[0][3];
+ const float a1 = setup->vmax[vertSlot][i] * setup->vmax[0][3];
+ const float da = a1 - a0;
+ const float dadx = da * setup->emaj.dx * setup->oneoverarea;
+ const float dady = da * setup->emaj.dy * setup->oneoverarea;
+ setup->coef.dadx[attrib][i] = dadx;
+ setup->coef.dady[attrib][i] = dady;
+ setup->coef.a0[attrib][i] = (setup->vmin[vertSlot][i] -
+ (dadx * (setup->vmin[0][0] - 0.5f) +
+ dady * (setup->vmin[0][1] - 0.5f)));
+ }
}
@@ -841,27 +933,23 @@ setup_line_coefficients(struct setup_context *setup,
/* z and w are done by linear interpolation:
*/
- line_linear_coeff(setup, &setup->posCoef, 0, 2);
- line_linear_coeff(setup, &setup->posCoef, 0, 3);
+ linear_pos_coeff(setup, 0, 2);
+ linear_pos_coeff(setup, 0, 3);
/* setup interpolation for all the remaining attributes:
*/
for (fragSlot = 0; fragSlot < lpfs->info.num_inputs; fragSlot++) {
const uint vertSlot = vinfo->attrib[fragSlot].src_index;
- uint j;
switch (vinfo->attrib[fragSlot].interp_mode) {
case INTERP_CONSTANT:
- for (j = 0; j < NUM_CHANNELS; j++)
- const_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
+ const_coeff(setup, fragSlot, vertSlot);
break;
case INTERP_LINEAR:
- for (j = 0; j < NUM_CHANNELS; j++)
- line_linear_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
+ line_linear_coeff(setup, fragSlot, vertSlot);
break;
case INTERP_PERSPECTIVE:
- for (j = 0; j < NUM_CHANNELS; j++)
- line_persp_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
+ line_persp_coeff(setup, fragSlot, vertSlot);
break;
case INTERP_POS:
setup_fragcoord_coeff(setup, fragSlot);
@@ -871,9 +959,9 @@ setup_line_coefficients(struct setup_context *setup,
}
if (lpfs->info.input_semantic_name[fragSlot] == TGSI_SEMANTIC_FACE) {
- setup->coef[fragSlot].a0[0] = 1.0f - setup->facing;
- setup->coef[fragSlot].dadx[0] = 0.0;
- setup->coef[fragSlot].dady[0] = 0.0;
+ setup->coef.a0[fragSlot][0] = 1.0f - setup->facing;
+ setup->coef.dadx[fragSlot][0] = 0.0;
+ setup->coef.dady[fragSlot][0] = 0.0;
}
}
return TRUE;
@@ -1027,15 +1115,17 @@ setup_line(struct setup_context *setup,
static void
-point_persp_coeff(const struct setup_context *setup,
+point_persp_coeff(struct setup_context *setup,
const float (*vert)[4],
- struct tgsi_interp_coef *coef,
- uint vertSlot, uint i)
+ unsigned attrib,
+ uint vertSlot)
{
- assert(i <= 3);
- coef->dadx[i] = 0.0F;
- coef->dady[i] = 0.0F;
- coef->a0[i] = vert[vertSlot][i] * vert[0][3];
+ unsigned i;
+ for(i = 0; i < NUM_CHANNELS; ++i) {
+ setup->coef.dadx[attrib][i] = 0.0F;
+ setup->coef.dady[attrib][i] = 0.0F;
+ setup->coef.a0[attrib][i] = vert[vertSlot][i] * vert[0][3];
+ }
}
@@ -1090,24 +1180,20 @@ setup_point( struct setup_context *setup,
setup->vprovoke = v0;
/* setup Z, W */
- const_coeff(setup, &setup->posCoef, 0, 2);
- const_coeff(setup, &setup->posCoef, 0, 3);
+ const_pos_coeff(setup, 0, 2);
+ const_pos_coeff(setup, 0, 3);
for (fragSlot = 0; fragSlot < lpfs->info.num_inputs; fragSlot++) {
const uint vertSlot = vinfo->attrib[fragSlot].src_index;
- uint j;
switch (vinfo->attrib[fragSlot].interp_mode) {
case INTERP_CONSTANT:
/* fall-through */
case INTERP_LINEAR:
- for (j = 0; j < NUM_CHANNELS; j++)
- const_coeff(setup, &setup->coef[fragSlot], vertSlot, j);
+ const_coeff(setup, fragSlot, vertSlot);
break;
case INTERP_PERSPECTIVE:
- for (j = 0; j < NUM_CHANNELS; j++)
- point_persp_coeff(setup, setup->vprovoke,
- &setup->coef[fragSlot], vertSlot, j);
+ point_persp_coeff(setup, setup->vprovoke, fragSlot, vertSlot);
break;
case INTERP_POS:
setup_fragcoord_coeff(setup, fragSlot);
@@ -1117,9 +1203,9 @@ setup_point( struct setup_context *setup,
}
if (lpfs->info.input_semantic_name[fragSlot] == TGSI_SEMANTIC_FACE) {
- setup->coef[fragSlot].a0[0] = 1.0f - setup->facing;
- setup->coef[fragSlot].dadx[0] = 0.0;
- setup->coef[fragSlot].dady[0] = 0.0;
+ setup->coef.a0[fragSlot][0] = 1.0f - setup->facing;
+ setup->coef.dadx[fragSlot][0] = 0.0;
+ setup->coef.dady[fragSlot][0] = 0.0;
}
}
@@ -1287,7 +1373,7 @@ struct setup_context *setup_create_context( struct llvmpipe_context *llvmpipe )
setup->llvmpipe = llvmpipe;
for (i = 0; i < MAX_QUADS; i++) {
- setup->quad[i].coef = setup->coef;
+ setup->quad[i].coef = &setup->coef;
setup->quad[i].posCoef = &setup->posCoef;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-05 13:57:54 +0000