Mesa (gallium-0.2): gallium: minor texture-related clean-ups, comments, etc

[Brian Paul]

Module: Mesa
Branch: gallium-0.2
Commit: dd55083ac1c13723dba6be71f161e2ca7cac7c66
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dd55083ac1c13723dba6be71f161e2ca7cac7c66

Author: Brian <brian.paul at tungstengraphics.com>
Date:   Fri Nov 28 10:28:44 2008 -0700

gallium: minor texture-related clean-ups, comments, etc

---

 src/gallium/auxiliary/tgsi/tgsi_exec.c       |    4 +-
 src/gallium/drivers/softpipe/sp_tex_sample.c |   28 +++++++++++++-------------
 src/gallium/drivers/softpipe/sp_tex_sample.h |    6 ++--
 3 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/src/gallium/auxiliary/tgsi/tgsi_exec.c b/src/gallium/auxiliary/tgsi/tgsi_exec.c
index 9fd0497..a2d2cfd 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_exec.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_exec.c
@@ -1535,7 +1535,7 @@ exec_kilp(struct tgsi_exec_machine *mach,
 
 
 /*
- * Fetch a texel using STR texture coordinates.
+ * Fetch a four texture samples using STR texture coordinates.
  */
 static void
 fetch_texel( struct tgsi_sampler *sampler,
@@ -1569,7 +1569,7 @@ exec_tex(struct tgsi_exec_machine *mach,
          boolean projected)
 {
    const uint unit = inst->FullSrcRegisters[1].SrcRegister.Index;
-   union tgsi_exec_channel r[8];
+   union tgsi_exec_channel r[4];
    uint chan_index;
    float lodBias;
 
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.c b/src/gallium/drivers/softpipe/sp_tex_sample.c
index b66caf9..1812477 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.c
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.c
@@ -516,6 +516,10 @@ compute_lambda(const struct pipe_texture *tex,
  * 2. Determine if we're minifying or magnifying
  * 3. If minifying, choose mipmap levels
  * 4. Return image filter to use within mipmap images
+ * \param level0  Returns first mipmap level to sample from
+ * \param level1  Returns second mipmap level to sample from
+ * \param levelBlend  Returns blend factor between levels, in [0,1]
+ * \param imgFilter  Returns either the min or mag filter, depending on lambda
  */
 static void
 choose_mipmap_levels(const struct pipe_texture *texture,
@@ -527,7 +531,6 @@ choose_mipmap_levels(const struct pipe_texture *texture,
                      unsigned *level0, unsigned *level1, float *levelBlend,
                      unsigned *imgFilter)
 {
-
    if (sampler->min_mip_filter == PIPE_TEX_MIPFILTER_NONE) {
       /* no mipmap selection needed */
       *level0 = *level1 = CLAMP((int) sampler->min_lod,
@@ -589,7 +592,6 @@ choose_mipmap_levels(const struct pipe_texture *texture,
 
 /**
  * Get a texel from a texture, using the texture tile cache.
- * Called by the TGSI interpreter.
  *
  * \param face  the cube face in 0..5
  * \param level  the mipmap level
@@ -603,7 +605,7 @@ choose_mipmap_levels(const struct pipe_texture *texture,
  * sp_get_cached_tile_tex() function.  Also, get 4 texels instead of 1...
  */
 static void
-get_texel(struct tgsi_sampler *tgsi_sampler,
+get_texel(const struct tgsi_sampler *tgsi_sampler,
           unsigned face, unsigned level, int x, int y, int z,
           float rgba[NUM_CHANNELS][QUAD_SIZE], unsigned j)
 {
@@ -693,7 +695,7 @@ shadow_compare(uint compare_func,
  * Could probably extend for 3D...
  */
 static void
-sp_get_samples_2d_common(struct tgsi_sampler *tgsi_sampler,
+sp_get_samples_2d_common(const struct tgsi_sampler *tgsi_sampler,
                          const float s[QUAD_SIZE],
                          const float t[QUAD_SIZE],
                          const float p[QUAD_SIZE],
@@ -805,8 +807,8 @@ sp_get_samples_2d_common(struct tgsi_sampler *tgsi_sampler,
 }
 
 
-static void
-sp_get_samples_1d(struct tgsi_sampler *sampler,
+static INLINE void
+sp_get_samples_1d(const struct tgsi_sampler *sampler,
                   const float s[QUAD_SIZE],
                   const float t[QUAD_SIZE],
                   const float p[QUAD_SIZE],
@@ -819,8 +821,8 @@ sp_get_samples_1d(struct tgsi_sampler *sampler,
 }
 
 
-static void
-sp_get_samples_2d(struct tgsi_sampler *sampler,
+static INLINE void
+sp_get_samples_2d(const struct tgsi_sampler *sampler,
                   const float s[QUAD_SIZE],
                   const float t[QUAD_SIZE],
                   const float p[QUAD_SIZE],
@@ -832,8 +834,8 @@ sp_get_samples_2d(struct tgsi_sampler *sampler,
 }
 
 
-static void
-sp_get_samples_3d(struct tgsi_sampler *tgsi_sampler,
+static INLINE void
+sp_get_samples_3d(const struct tgsi_sampler *tgsi_sampler,
                   const float s[QUAD_SIZE],
                   const float t[QUAD_SIZE],
                   const float p[QUAD_SIZE],
@@ -960,7 +962,7 @@ sp_get_samples_3d(struct tgsi_sampler *tgsi_sampler,
 
 
 static void
-sp_get_samples_cube(struct tgsi_sampler *sampler,
+sp_get_samples_cube(const struct tgsi_sampler *sampler,
                     const float s[QUAD_SIZE],
                     const float t[QUAD_SIZE],
                     const float p[QUAD_SIZE],
@@ -977,7 +979,7 @@ sp_get_samples_cube(struct tgsi_sampler *sampler,
 
 
 static void
-sp_get_samples_rect(struct tgsi_sampler *tgsi_sampler,
+sp_get_samples_rect(const struct tgsi_sampler *tgsi_sampler,
                     const float s[QUAD_SIZE],
                     const float t[QUAD_SIZE],
                     const float p[QUAD_SIZE],
@@ -1047,8 +1049,6 @@ sp_get_samples_rect(struct tgsi_sampler *tgsi_sampler,
 }
 
 
-
-
 /**
  * Called via tgsi_sampler::get_samples()
  * Use the sampler's state setting to get a filtered RGBA value
diff --git a/src/gallium/drivers/softpipe/sp_tex_sample.h b/src/gallium/drivers/softpipe/sp_tex_sample.h
index 783169c..f0a8a78 100644
--- a/src/gallium/drivers/softpipe/sp_tex_sample.h
+++ b/src/gallium/drivers/softpipe/sp_tex_sample.h
@@ -46,10 +46,10 @@ struct sp_shader_sampler
 
 
 
-static INLINE struct sp_shader_sampler *
-sp_shader_sampler(struct tgsi_sampler *sampler)
+static INLINE const struct sp_shader_sampler *
+sp_shader_sampler(const struct tgsi_sampler *sampler)
 {
-   return (struct sp_shader_sampler *) sampler;
+   return (const struct sp_shader_sampler *) sampler;
 }