These functions will be used by textureQueryLod.
---
src/gallium/drivers/softpipe/sp_tex_sample.c | 100 +++++++++++++++++++++++++--
src/gallium/drivers/softpipe/sp_tex_sample.h | 7 ++
2 files changed, 101 insertions(+), 6 deletions(-)
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c
b/src/gallium/drivers/softpipe/sp_tex_sample.c
index cdec984..6e639e0 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.c
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
@@ -1937,6 +1937,38 @@ get_gather_component(const float lod_in[TGSI_QUAD_SIZE])
}
static void
+clamp_lod(const struct sp_sampler_view *sp_sview,
+ const struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float clamped[TGSI_QUAD_SIZE])
+{
+ const float min_lod = sp_samp->base.min_lod;
+ const float max_lod = sp_samp->base.max_lod;
+ const float min_level = sp_sview->base.u.tex.first_level;
+ const float max_level = sp_sview->base.u.tex.last_level;
+ int i;
+
+ for (i = 0; i < TGSI_QUAD_SIZE; i++) {
+ float cl = lod[i];
+
+ cl = CLAMP(cl, min_lod, max_lod);
+ /* XXX: Is min_level ever different from 0?
+ */
+ cl = CLAMP(cl, 0, max_level - min_level);
+ clamped[i] = cl;
+ }
+}
+
+static void
+mip_level_linear(struct sp_sampler_view *sp_sview,
+ struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float level[TGSI_QUAD_SIZE])
+{
+ clamp_lod(sp_sview, sp_samp, lod, level);
+}
+
+static void
mip_filter_linear(struct sp_sampler_view *sp_sview,
struct sp_sampler *sp_samp,
img_filter_func min_filter,
@@ -1998,6 +2030,23 @@ mip_filter_linear(struct sp_sampler_view *sp_sview,
}
+static void
+mip_level_nearest(struct sp_sampler_view *sp_sview,
+ struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float level[TGSI_QUAD_SIZE])
+{
+ const int first_level = sp_sview->base.u.tex.first_level;
+ int j;
+
+ clamp_lod(sp_sview, sp_samp, lod, level);
+ for (j = 0; j < TGSI_QUAD_SIZE; j++)
+ /* TODO: It should rather be:
+ * level[j] = first_level + ceil(level[j] + 0.5F) - 1.0F;
+ */
+ level[j] = first_level + (int)(level[j] + 0.5F);
+}
+
/**
* Compute nearest mipmap level from texcoords.
* Then sample the texture level for four elements of a quad.
@@ -2050,6 +2099,19 @@ mip_filter_nearest(struct sp_sampler_view *sp_sview,
static void
+mip_level_none(struct sp_sampler_view *sp_sview,
+ struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float level[TGSI_QUAD_SIZE])
+{
+ int j;
+
+ for (j = 0; j < TGSI_QUAD_SIZE; j++) {
+ level[j] = sp_sview->base.u.tex.first_level;
+ }
+}
+
+static void
mip_filter_none(struct sp_sampler_view *sp_sview,
struct sp_sampler *sp_samp,
img_filter_func min_filter,
@@ -2088,6 +2150,15 @@ mip_filter_none(struct sp_sampler_view *sp_sview,
static void
+mip_level_none_no_filter_select(struct sp_sampler_view *sp_sview,
+ struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float level[TGSI_QUAD_SIZE])
+{
+ mip_level_none(sp_sview, sp_samp, lod, level);
+}
+
+static void
mip_filter_none_no_filter_select(struct sp_sampler_view *sp_sview,
struct sp_sampler *sp_samp,
img_filter_func min_filter,
@@ -2339,6 +2410,15 @@ img_filter_2d_ewa(struct sp_sampler_view *sp_sview,
}
+static void
+mip_level_linear_aniso(struct sp_sampler_view *sp_sview,
+ struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float level[TGSI_QUAD_SIZE])
+{
+ mip_level_linear(sp_sview, sp_samp, lod, level);
+}
+
/**
* Sample 2D texture using an anisotropic filter.
*/
@@ -2450,6 +2530,14 @@ mip_filter_linear_aniso(struct sp_sampler_view *sp_sview,
}
}
+static void
+mip_level_linear_2d_linear_repeat_POT(struct sp_sampler_view *sp_sview,
+ struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float level[TGSI_QUAD_SIZE])
+{
+ mip_level_linear(sp_sview, sp_samp, lod, level);
+}
/**
* Specialized version of mip_filter_linear with hard-wired calls to
@@ -2515,12 +2603,12 @@ mip_filter_linear_2d_linear_repeat_POT(
}
}
-static struct sp_mip mip_linear = {mip_filter_linear};
-static struct sp_mip mip_nearest = {mip_filter_nearest};
-static struct sp_mip mip_none = {mip_filter_none};
-static struct sp_mip mip_none_no_filter_select =
{mip_filter_none_no_filter_select};
-static struct sp_mip mip_linear_aniso = {mip_filter_linear_aniso};
-static struct sp_mip mip_linear_2d_linear_repeat_POT =
{mip_filter_linear_2d_linear_repeat_POT};
+static struct sp_mip mip_linear = {mip_level_linear, mip_filter_linear};
+static struct sp_mip mip_nearest = {mip_level_nearest, mip_filter_nearest};
+static struct sp_mip mip_none = {mip_level_none, mip_filter_none};
+static struct sp_mip mip_none_no_filter_select =
{mip_level_none_no_filter_select, mip_filter_none_no_filter_select};
+static struct sp_mip mip_linear_aniso = {mip_level_linear_aniso,
mip_filter_linear_aniso};
+static struct sp_mip mip_linear_2d_linear_repeat_POT =
{mip_level_linear_2d_linear_repeat_POT, mip_filter_linear_2d_linear_repeat_POT};
/**
* Do shadow/depth comparisons.
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.h
b/src/gallium/drivers/softpipe/sp_tex_sample.h
index 7739f59..89cf9d1 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.h
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.h
@@ -87,6 +87,12 @@ typedef void (*mip_filter_func)(struct sp_sampler_view
*sp_sview,
float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
+typedef void (*mip_level_func)(struct sp_sampler_view *sp_sview,
+ struct sp_sampler *sp_samp,
+ const float lod[TGSI_QUAD_SIZE],
+ float level[TGSI_QUAD_SIZE]);
+
+
typedef void (*convert_func)(struct sp_sampler_view *sp_sview,
struct sp_sampler *sp_samp,
const float s[TGSI_QUAD_SIZE],
@@ -129,6 +135,7 @@ struct sp_sampler_view
};
struct sp_mip {
+ mip_level_func level;
mip_filter_func filter;
};
--
2.4.3
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