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path: root/src/gallium/drivers/softpipe/sp_tex_sample.c
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Diffstat (limited to 'src/gallium/drivers/softpipe/sp_tex_sample.c')
-rw-r--r--src/gallium/drivers/softpipe/sp_tex_sample.c157
1 files changed, 71 insertions, 86 deletions
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c
index ecd6b39863..fa9e19b282 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.c
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
@@ -55,7 +55,7 @@
static INLINE float
frac(float f)
{
- return f - util_ifloor(f);
+ return f - floorf(f);
}
@@ -201,11 +201,9 @@ wrap_nearest_mirror_repeat(const float s[4], unsigned size, int icoord[4])
const float max = 1.0F - min;
for (ch = 0; ch < 4; ch++) {
const int flr = util_ifloor(s[ch]);
- float u;
+ float u = frac(s[ch]);
if (flr & 1)
- u = 1.0F - (s[ch] - (float) flr);
- else
- u = s[ch] - (float) flr;
+ u = 1.0F - u;
if (u < min)
icoord[ch] = 0;
else if (u > max)
@@ -358,11 +356,9 @@ wrap_linear_mirror_repeat(const float s[4], unsigned size,
uint ch;
for (ch = 0; ch < 4; ch++) {
const int flr = util_ifloor(s[ch]);
- float u;
+ float u = frac(s[ch]);
if (flr & 1)
- u = 1.0F - (s[ch] - (float) flr);
- else
- u = s[ch] - (float) flr;
+ u = 1.0F - u;
u = u * size - 0.5F;
icoord0[ch] = util_ifloor(u);
icoord1[ch] = icoord0[ch] + 1;
@@ -441,8 +437,7 @@ wrap_linear_mirror_clamp_to_border(const float s[4], unsigned size,
/**
- * For RECT textures / unnormalized texcoords
- * Only a subset of wrap modes supported.
+ * PIPE_TEX_WRAP_CLAMP for nearest sampling, unnormalized coords.
*/
static void
wrap_nearest_unorm_clamp(const float s[4], unsigned size, int icoord[4])
@@ -456,7 +451,7 @@ wrap_nearest_unorm_clamp(const float s[4], unsigned size, int icoord[4])
/**
- * Handles clamp_to_edge and clamp_to_border:
+ * PIPE_TEX_WRAP_CLAMP_TO_BORDER for nearest sampling, unnormalized coords.
*/
static void
wrap_nearest_unorm_clamp_to_border(const float s[4], unsigned size,
@@ -464,14 +459,27 @@ wrap_nearest_unorm_clamp_to_border(const float s[4], unsigned size,
{
uint ch;
for (ch = 0; ch < 4; ch++) {
+ icoord[ch]= util_ifloor( CLAMP(s[ch], -0.5F, (float) size + 0.5F) );
+ }
+}
+
+
+/**
+ * PIPE_TEX_WRAP_CLAMP_TO_EDGE for nearest sampling, unnormalized coords.
+ */
+static void
+wrap_nearest_unorm_clamp_to_edge(const float s[4], unsigned size,
+ int icoord[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
icoord[ch]= util_ifloor( CLAMP(s[ch], 0.5F, (float) size - 0.5F) );
}
}
/**
- * For RECT textures / unnormalized texcoords.
- * Only a subset of wrap modes supported.
+ * PIPE_TEX_WRAP_CLAMP for linear sampling, unnormalized coords.
*/
static void
wrap_linear_unorm_clamp(const float s[4], unsigned size,
@@ -488,13 +496,36 @@ wrap_linear_unorm_clamp(const float s[4], unsigned size,
}
+/**
+ * PIPE_TEX_WRAP_CLAMP_TO_BORDER for linear sampling, unnormalized coords.
+ */
static void
wrap_linear_unorm_clamp_to_border(const float s[4], unsigned size,
int icoord0[4], int icoord1[4], float w[4])
{
uint ch;
for (ch = 0; ch < 4; ch++) {
- float u = CLAMP(s[ch], 0.5F, (float) size - 0.5F);
+ float u = CLAMP(s[ch], -0.5F, (float) size + 0.5F);
+ u -= 0.5F;
+ icoord0[ch] = util_ifloor(u);
+ icoord1[ch] = icoord0[ch] + 1;
+ if (icoord1[ch] > (int) size - 1)
+ icoord1[ch] = size - 1;
+ w[ch] = frac(u);
+ }
+}
+
+
+/**
+ * PIPE_TEX_WRAP_CLAMP_TO_EDGE for linear sampling, unnormalized coords.
+ */
+static void
+wrap_linear_unorm_clamp_to_edge(const float s[4], unsigned size,
+ int icoord0[4], int icoord1[4], float w[4])
+{
+ uint ch;
+ for (ch = 0; ch < 4; ch++) {
+ float u = CLAMP(s[ch], +0.5F, (float) size - 0.5F);
u -= 0.5F;
icoord0[ch] = util_ifloor(u);
icoord1[ch] = icoord0[ch] + 1;
@@ -1583,7 +1614,6 @@ sample_cube(struct tgsi_sampler *tgsi_sampler,
struct sp_sampler_varient *samp = sp_sampler_varient(tgsi_sampler);
unsigned j;
float ssss[4], tttt[4];
- unsigned face;
/*
major axis
@@ -1597,7 +1627,8 @@ sample_cube(struct tgsi_sampler *tgsi_sampler,
-rz TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT -rx -ry rz
*/
- /* First choose the cube face.
+ /* Choose the cube face and compute new s/t coords for the 2D face.
+ *
* Use the same cube face for all four pixels in the quad.
*
* This isn't ideal, but if we want to use a different cube face
@@ -1616,82 +1647,34 @@ sample_cube(struct tgsi_sampler *tgsi_sampler,
const float arx = fabsf(rx), ary = fabsf(ry), arz = fabsf(rz);
if (arx >= ary && arx >= arz) {
- if (rx >= 0.0F) {
- face = PIPE_TEX_FACE_POS_X;
- }
- else {
- face = PIPE_TEX_FACE_NEG_X;
+ float sign = (rx >= 0.0F) ? 1.0F : -1.0F;
+ uint face = (rx >= 0.0F) ? PIPE_TEX_FACE_POS_X : PIPE_TEX_FACE_NEG_X;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float ima = -0.5F / fabsf(s[j]);
+ ssss[j] = sign * p[j] * ima + 0.5F;
+ tttt[j] = t[j] * ima + 0.5F;
+ samp->faces[j] = face;
}
}
else if (ary >= arx && ary >= arz) {
- if (ry >= 0.0F) {
- face = PIPE_TEX_FACE_POS_Y;
- }
- else {
- face = PIPE_TEX_FACE_NEG_Y;
+ float sign = (ry >= 0.0F) ? 1.0F : -1.0F;
+ uint face = (ry >= 0.0F) ? PIPE_TEX_FACE_POS_Y : PIPE_TEX_FACE_NEG_Y;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float ima = -0.5F / fabsf(t[j]);
+ ssss[j] = -s[j] * ima + 0.5F;
+ tttt[j] = sign * -p[j] * ima + 0.5F;
+ samp->faces[j] = face;
}
}
else {
- if (rz > 0.0F) {
- face = PIPE_TEX_FACE_POS_Z;
+ float sign = (rz >= 0.0F) ? 1.0F : -1.0F;
+ uint face = (rz >= 0.0F) ? PIPE_TEX_FACE_POS_Z : PIPE_TEX_FACE_NEG_Z;
+ for (j = 0; j < QUAD_SIZE; j++) {
+ const float ima = -0.5 / fabsf(p[j]);
+ ssss[j] = sign * -s[j] * ima + 0.5F;
+ tttt[j] = t[j] * ima + 0.5F;
+ samp->faces[j] = face;
}
- else {
- face = PIPE_TEX_FACE_NEG_Z;
- }
- }
- }
-
- /* Now compute the 2D _face_ texture coords from the
- * 3D _cube_ texture coords.
- */
- for (j = 0; j < QUAD_SIZE; j++) {
- const float rx = s[j], ry = t[j], rz = p[j];
- const float arx = fabsf(rx), ary = fabsf(ry), arz = fabsf(rz);
- float sc, tc, ma;
-
- switch (face) {
- case PIPE_TEX_FACE_POS_X:
- sc = -rz;
- tc = -ry;
- ma = arx;
- break;
- case PIPE_TEX_FACE_NEG_X:
- sc = rz;
- tc = -ry;
- ma = arx;
- break;
- case PIPE_TEX_FACE_POS_Y:
- sc = rx;
- tc = rz;
- ma = ary;
- break;
- case PIPE_TEX_FACE_NEG_Y:
- sc = rx;
- tc = -rz;
- ma = ary;
- break;
- case PIPE_TEX_FACE_POS_Z:
- sc = rx;
- tc = -ry;
- ma = arz;
- break;
- case PIPE_TEX_FACE_NEG_Z:
- sc = -rx;
- tc = -ry;
- ma = arz;
- break;
- default:
- assert(0 && "bad cube face");
- sc = 0.0F;
- tc = 0.0F;
- ma = 0.0F;
- }
-
- {
- const float ima = 1.0 / ma;
- ssss[j] = ( sc * ima + 1.0F ) * 0.5F;
- tttt[j] = ( tc * ima + 1.0F ) * 0.5F;
- samp->faces[j] = face;
}
}
@@ -1711,6 +1694,7 @@ get_nearest_unorm_wrap(unsigned mode)
case PIPE_TEX_WRAP_CLAMP:
return wrap_nearest_unorm_clamp;
case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ return wrap_nearest_unorm_clamp_to_edge;
case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
return wrap_nearest_unorm_clamp_to_border;
default:
@@ -1754,6 +1738,7 @@ get_linear_unorm_wrap(unsigned mode)
case PIPE_TEX_WRAP_CLAMP:
return wrap_linear_unorm_clamp;
case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
+ return wrap_linear_unorm_clamp_to_edge;
case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
return wrap_linear_unorm_clamp_to_border;
default:
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-13 15:05:53 +0000