cell: support NPOT textures, clamp/repeat mode, normalized/unorm texcoords

glDrawPixels works now.

3 files changed, 117 insertions, 42 deletions

diff --git a/src/gallium/drivers/cell/spu/spu_command.c b/src/gallium/drivers/cell/spu/spu_command.c
index fa78377c66..b1efe97e76 100644
--- a/src/gallium/drivers/cell/spu/spu_command.c
+++ b/src/gallium/drivers/cell/spu/spu_command.c
@@ -295,6 +295,42 @@ cmd_state_framebuffer(const struct cell_command_framebuffer *cmd)
 }
 
 
+/**
+ * Tex texture mask_s/t and scale_s/t fields depend on the texture size and
+ * sampler wrap modes.
+ */
+static void
+update_tex_masks(struct spu_texture *texture,
+                 const struct pipe_sampler_state *sampler)
+{
+   uint i;
+
+   for (i = 0; i < CELL_MAX_TEXTURE_LEVELS; i++) {
+      int width = texture->level[i].width;
+      int height = texture->level[i].height;
+
+      if (sampler->wrap_s == PIPE_TEX_WRAP_REPEAT)
+         texture->level[i].mask_s = spu_splats(width - 1);
+      else
+         texture->level[i].mask_s = spu_splats(~0);
+
+      if (sampler->wrap_t == PIPE_TEX_WRAP_REPEAT)
+         texture->level[i].mask_t = spu_splats(height - 1);
+      else
+         texture->level[i].mask_t = spu_splats(~0);
+
+      if (sampler->normalized_coords) {
+         texture->level[i].scale_s = spu_splats((float) width);
+         texture->level[i].scale_t = spu_splats((float) height);
+      }
+      else {
+         texture->level[i].scale_s = spu_splats(1.0f);
+         texture->level[i].scale_t = spu_splats(1.0f);
+      }
+   }
+}
+
+
 static void
 cmd_state_sampler(const struct cell_command_sampler *sampler)
 {
@@ -341,6 +377,8 @@ cmd_state_sampler(const struct cell_command_sampler *sampler)
    default:
       ASSERT(0);
    }
+
+   update_tex_masks(&spu.texture[unit], &spu.sampler[unit]);
 }
 
 
@@ -370,15 +408,15 @@ cmd_state_texture(const struct cell_command_texture *texture)
       spu.texture[unit].level[i].tiles_per_row =
          (width + TILE_SIZE - 1) / TILE_SIZE;
 
-      spu.texture[unit].level[i].width4 = spu_splats((float) width);
-      spu.texture[unit].level[i].height4 = spu_splats((float) height);
-
-      spu.texture[unit].level[i].tex_size_x_mask = spu_splats(width - 1);
-      spu.texture[unit].level[i].tex_size_y_mask = spu_splats(height - 1);
+      spu.texture[unit].level[i].max_s = spu_splats((int) width - 1);
+      spu.texture[unit].level[i].max_t = spu_splats((int) height - 1);
 
       if (texture->start[i])
          spu.texture[unit].max_level = i;
    }
+
+   update_tex_masks(&spu.texture[unit], &spu.sampler[unit]);
+
    //Debug=0;
 }
 
diff --git a/src/gallium/drivers/cell/spu/spu_main.h b/src/gallium/drivers/cell/spu/spu_main.h
index 56aac655e9..45c6f4ced1 100644
--- a/src/gallium/drivers/cell/spu/spu_main.h
+++ b/src/gallium/drivers/cell/spu/spu_main.h
@@ -107,17 +107,21 @@ struct spu_framebuffer
 } ALIGN16_ATTRIB;
 
 
+/** per-texture level info */
 struct spu_texture_level
 {
    void *start;
    ushort width, height;
    ushort tiles_per_row;
-   vector float width4;   /**< == {width, width, width, width} */
-   vector float height4;  /**< == {height, height, height, height} */
-   vector unsigned int tex_size_x_mask; /**< splat(width-1) */
-   vector unsigned int tex_size_y_mask; /**< splat(height-1) */
+   /** texcoord scale factors */
+   vector float scale_s, scale_t;
+   /** texcoord masks (if REPEAT then size-1, else ~0) */
+   vector signed int mask_s, mask_t;
+   /** texcoord clamp limits */
+   vector signed int max_s, max_t;
 } ALIGN16_ATTRIB;
 
+
 struct spu_texture
 {
    struct spu_texture_level level[CELL_MAX_TEXTURE_LEVELS];
diff --git a/src/gallium/drivers/cell/spu/spu_texture.c b/src/gallium/drivers/cell/spu/spu_texture.c
index 83cf7dc394..b21c43a467 100644
--- a/src/gallium/drivers/cell/spu/spu_texture.c
+++ b/src/gallium/drivers/cell/spu/spu_texture.c
@@ -67,13 +67,13 @@ invalidate_tex_cache(void)
  * a time.
  */
 static void
-get_four_texels(uint unit, uint level, vec_uint4 x, vec_uint4 y,
+get_four_texels(uint unit, uint level, vec_int4 x, vec_int4 y,
                 vec_uint4 *texels)
 {
    const struct spu_texture_level *tlevel = &spu.texture[unit].level[level];
    const unsigned texture_ea = (uintptr_t) tlevel->start;
-   const vec_uint4 tile_x = spu_rlmask(x, -5);  /* tile_x = x / 32 */
-   const vec_uint4 tile_y = spu_rlmask(y, -5);  /* tile_y = y / 32 */
+   const vec_int4 tile_x = spu_rlmask(x, -5);  /* tile_x = x / 32 */
+   const vec_int4 tile_y = spu_rlmask(y, -5);  /* tile_y = y / 32 */
    const qword offset_x = si_andi((qword) x, 0x1f); /* offset_x = x & 0x1f */
    const qword offset_y = si_andi((qword) y, 0x1f); /* offset_y = y & 0x1f */
 
@@ -99,6 +99,20 @@ get_four_texels(uint unit, uint level, vec_uint4 x, vec_uint4 y,
 }
 
 
+/** clamp vec to [0, max] */
+static INLINE vector signed int
+spu_clamp(vector signed int vec, vector signed int max)
+{
+   static const vector signed int zero = {0,0,0,0};
+   vector unsigned int c;
+   c = spu_cmpgt(vec, zero);    /* c = vec > zero ? ~0 : 0 */
+   vec = spu_sel(zero, vec, c);
+   c = spu_cmpgt(vec, max);    /* c = vec > max ? ~0 : 0 */
+   vec = spu_sel(vec, max, c);
+   return vec;
+}
+
+
 
 /**
  * Do nearest texture sampling for four pixels.
@@ -109,15 +123,20 @@ sample_texture4_nearest(vector float s, vector float t,
                         vector float r, vector float q,
                         uint unit, uint level, vector float colors[4])
 {
-   vector float ss = spu_mul(s, spu.texture[unit].level[level].width4);
-   vector float tt = spu_mul(t, spu.texture[unit].level[level].height4);
-   vector unsigned int is = spu_convtu(ss, 0);
-   vector unsigned int it = spu_convtu(tt, 0);
+   const struct spu_texture_level *tlevel = &spu.texture[unit].level[level];
+   vector float ss = spu_mul(s, tlevel->scale_s);
+   vector float tt = spu_mul(t, tlevel->scale_t);
+   vector signed int is = spu_convts(ss, 0);
+   vector signed int it = spu_convts(tt, 0);
    vec_uint4 texels[4];
 
    /* PIPE_TEX_WRAP_REPEAT */
-   is = spu_and(is, spu.texture[unit].level[level].tex_size_x_mask);
-   it = spu_and(it, spu.texture[unit].level[level].tex_size_y_mask);
+   is = spu_and(is, tlevel->mask_s);
+   it = spu_and(it, tlevel->mask_t);
+
+   /* PIPE_TEX_WRAP_CLAMP */
+   is = spu_clamp(is, tlevel->max_s);
+   it = spu_clamp(it, tlevel->max_t);
 
    get_four_texels(unit, level, is, it, texels);
 
@@ -135,21 +154,28 @@ sample_texture4_bilinear(vector float s, vector float t,
                          vector float r, vector float q,
                          uint unit, uint level, vector float colors[4])
 {
-   vector float ss = spu_madd(s, spu.texture[unit].level[level].width4,  spu_splats(-0.5f));
-   vector float tt = spu_madd(t, spu.texture[unit].level[level].height4, spu_splats(-0.5f));
+   const struct spu_texture_level *tlevel = &spu.texture[unit].level[level];
+   vector float ss = spu_madd(s, tlevel->scale_s,  spu_splats(-0.5f));
+   vector float tt = spu_madd(t, tlevel->scale_t, spu_splats(-0.5f));
 
-   vector unsigned int is0 = (vector unsigned int) spu_convts(ss, 0);
-   vector unsigned int it0 = (vector unsigned int) spu_convts(tt, 0);
+   vector signed int is0 = spu_convts(ss, 0);
+   vector signed int it0 = spu_convts(tt, 0);
 
    /* is + 1, it + 1 */
-   vector unsigned int is1 = spu_add(is0, 1);
-   vector unsigned int it1 = spu_add(it0, 1);
+   vector signed int is1 = spu_add(is0, 1);
+   vector signed int it1 = spu_add(it0, 1);
 
    /* PIPE_TEX_WRAP_REPEAT */
-   is0 = spu_and(is0, spu.texture[unit].level[level].tex_size_x_mask);
-   it0 = spu_and(it0, spu.texture[unit].level[level].tex_size_y_mask);
-   is1 = spu_and(is1, spu.texture[unit].level[level].tex_size_x_mask);
-   it1 = spu_and(it1, spu.texture[unit].level[level].tex_size_y_mask);
+   is0 = spu_and(is0, tlevel->mask_s);
+   it0 = spu_and(it0, tlevel->mask_t);
+   is1 = spu_and(is1, tlevel->mask_s);
+   it1 = spu_and(it1, tlevel->mask_t);
+
+   /* PIPE_TEX_WRAP_CLAMP */
+   is0 = spu_clamp(is0, tlevel->max_s);
+   it0 = spu_clamp(it0, tlevel->max_t);
+   is1 = spu_clamp(is1, tlevel->max_s);
+   it1 = spu_clamp(it1, tlevel->max_t);
 
    /* get packed int texels */
    vector unsigned int texels[16];
@@ -275,34 +301,41 @@ sample_texture4_bilinear_2(vector float s, vector float t,
                            vector float r, vector float q,
                            uint unit, uint level, vector float colors[4])
 {
+   const struct spu_texture_level *tlevel = &spu.texture[unit].level[level];
    static const vector float half = {-0.5f, -0.5f, -0.5f, -0.5f};
    /* Scale texcoords by size of texture, and add half pixel bias */
-   vector float ss = spu_madd(s, spu.texture[unit].level[level].width4, half);
-   vector float tt = spu_madd(t, spu.texture[unit].level[level].height4, half);
+   vector float ss = spu_madd(s, tlevel->scale_s, half);
+   vector float tt = spu_madd(t, tlevel->scale_t, half);
 
    /* convert float coords to fixed-pt coords with 8 fraction bits */
-   vector unsigned int is = (vector unsigned int) spu_convts(ss, 8);
-   vector unsigned int it = (vector unsigned int) spu_convts(tt, 8);
+   vector signed int is = spu_convts(ss, 8);
+   vector signed int it = spu_convts(tt, 8);
 
    /* compute integer texel weights in [0, 255] */
-   vector signed int sWeights0 = spu_and((vector signed int) is, 255);
-   vector signed int tWeights0 = spu_and((vector signed int) it, 255);
+   vector signed int sWeights0 = spu_and(is, 255);
+   vector signed int tWeights0 = spu_and(it, 255);
    vector signed int sWeights1 = spu_sub(255, sWeights0);
    vector signed int tWeights1 = spu_sub(255, tWeights0);
 
    /* texel coords: is0 = is / 256, it0 = is / 256 */
-   vector unsigned int is0 = spu_rlmask(is, -8);
-   vector unsigned int it0 = spu_rlmask(it, -8);
+   vector signed int is0 = spu_rlmask(is, -8);
+   vector signed int it0 = spu_rlmask(it, -8);
 
    /* texel coords: i1 = is0 + 1, it1 = it0 + 1 */
-   vector unsigned int is1 = spu_add(is0, 1);
-   vector unsigned int it1 = spu_add(it0, 1);
+   vector signed int is1 = spu_add(is0, 1);
+   vector signed int it1 = spu_add(it0, 1);
 
    /* PIPE_TEX_WRAP_REPEAT */
-   is0 = spu_and(is0, spu.texture[unit].level[level].tex_size_x_mask);
-   it0 = spu_and(it0, spu.texture[unit].level[level].tex_size_y_mask);
-   is1 = spu_and(is1, spu.texture[unit].level[level].tex_size_x_mask);
-   it1 = spu_and(it1, spu.texture[unit].level[level].tex_size_y_mask);
+   is0 = spu_and(is0, tlevel->mask_s);
+   it0 = spu_and(it0, tlevel->mask_t);
+   is1 = spu_and(is1, tlevel->mask_s);
+   it1 = spu_and(it1, tlevel->mask_t);
+
+   /* PIPE_TEX_WRAP_CLAMP */
+   is0 = spu_clamp(is0, tlevel->max_s);
+   it0 = spu_clamp(it0, tlevel->max_t);
+   is1 = spu_clamp(is1, tlevel->max_s);
+   it1 = spu_clamp(it1, tlevel->max_t);
 
    /* get packed int texels */
    vector unsigned int texels[16];