i915: Refractored and clean up i915_texture.c

1 files changed, 141 insertions, 128 deletions

diff --git a/src/gallium/drivers/i915simple/i915_texture.c b/src/gallium/drivers/i915simple/i915_texture.c
index d591b09e3c8..09518fafe76 100644
--- a/src/gallium/drivers/i915simple/i915_texture.c
+++ b/src/gallium/drivers/i915simple/i915_texture.c
@@ -42,12 +42,58 @@
 #include "i915_debug.h"
 #include "i915_screen.h"
 
+/*
+ * Helper function and arrays
+ */
+
+/**
+ * Initial offset for Cube map.
+ */
+static const int initial_offsets[6][2] = {
+   {0, 0},
+   {0, 2},
+   {1, 0},
+   {1, 2},
+   {1, 1},
+   {1, 3}
+};
+
+/**
+ * Step offsets for Cube map.
+ */
+static const int step_offsets[6][2] = {
+   {0, 2},
+   {0, 2},
+   {-1, 2},
+   {-1, 2},
+   {-1, 1},
+   {-1, 1}
+};
 
 static unsigned minify( unsigned d )
 {
    return MAX2(1, d>>1);
 }
 
+static unsigned
+power_of_two(unsigned x)
+{
+   unsigned value = 1;
+   while (value <= x)
+      value = value << 1;
+   return value;
+}
+
+static unsigned
+round_up(unsigned n, unsigned multiple)
+{
+   return (n + multiple - 1) & ~(multiple - 1);
+}
+
+
+/*
+ * More advanced helper funcs
+ */
 
 
 static void
@@ -86,7 +132,6 @@ i915_miptree_set_level_info(struct i915_texture *tex,
    tex->image_offset[level][0] = 0;
 }
 
-
 static void
 i915_miptree_set_image_offset(struct i915_texture *tex,
 			      unsigned level, unsigned img, unsigned x, unsigned y)
@@ -97,27 +142,17 @@ i915_miptree_set_image_offset(struct i915_texture *tex,
    assert(img < tex->nr_images[level]);
 
    tex->image_offset[level][img] = (x + y * tex->pitch);
-
    /*
-   DBG("%s level %d img %d pos %d,%d image_offset %x\n",
+   printf("%s level %d img %d pos %d,%d image_offset %x\n",
        __FUNCTION__, level, img, x, y, tex->image_offset[level][img]);
    */
 }
 
-static unsigned
-power_of_two(unsigned x)
-{
-   unsigned value = 1;
-   while (value <= x)
-      value = value << 1;
-   return value;
-}
 
-static unsigned
-round_up(unsigned n, unsigned multiple)
-{
-   return (n + multiple - 1) & ~(multiple - 1);
-}
+/*
+ * Layout functions
+ */
+
 
 /**
  * Special case to deal with display targets.
@@ -144,11 +179,11 @@ i915_displaytarget_layout(struct i915_texture *tex)
       tex->total_height = tex->base.height[0];
    }
 
-/*
+   /*
    printf("%s size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
       tex->base.width[0], tex->base.height[0], pt->cpp,
       tex->pitch, tex->total_height, tex->pitch * tex->total_height * 4);
-*/
+   */
 
    return 1;
 }
@@ -221,25 +256,93 @@ i945_miptree_layout_2d( struct i915_texture *tex )
    }
 }
 
+static void
+i945_miptree_layout_cube(struct i915_texture *tex)
+{
+   struct pipe_texture *pt = &tex->base;
+   unsigned level;
 
-static const int initial_offsets[6][2] = {
-   {0, 0},
-   {0, 2},
-   {1, 0},
-   {1, 2},
-   {1, 1},
-   {1, 3}
-};
+   const unsigned dim = pt->width[0];
+   unsigned face;
+   unsigned lvlWidth = pt->width[0], lvlHeight = pt->height[0];
 
-static const int step_offsets[6][2] = {
-   {0, 2},
-   {0, 2},
-   {-1, 2},
-   {-1, 2},
-   {-1, 1},
-   {-1, 1}
-};
+   assert(lvlWidth == lvlHeight); /* cubemap images are square */
+
+   /* Depending on the size of the largest images, pitch can be
+    * determined either by the old-style packing of cubemap faces,
+    * or the final row of 4x4, 2x2 and 1x1 faces below this.
+    */
+   if (dim > 32)
+      tex->pitch = ((dim * pt->cpp * 2 + 3) & ~3) / pt->cpp;
+   else
+      tex->pitch = 14 * 8;
+
+   tex->total_height = dim * 4 + 4;
+
+   /* Set all the levels to effectively occupy the whole rectangular region.
+   */
+   for (level = 0; level <= pt->last_level; level++) {
+      i915_miptree_set_level_info(tex, level, 6, 0, 0, lvlWidth, lvlHeight, 1);
+      lvlWidth /= 2;
+      lvlHeight /= 2;
+   }
 
+   for (face = 0; face < 6; face++) {
+      unsigned x = initial_offsets[face][0] * dim;
+      unsigned y = initial_offsets[face][1] * dim;
+      unsigned d = dim;
+
+      if (dim == 4 && face >= 4) {
+         y = tex->total_height - 4;
+         x = (face - 4) * 8;
+      }
+      else if (dim < 4 && (face > 0)) {
+         y = tex->total_height - 4;
+         x = face * 8;
+      }
+
+      for (level = 0; level <= pt->last_level; level++) {
+         i915_miptree_set_image_offset(tex, level, face, x, y);
+
+         d >>= 1;
+
+         switch (d) {
+            case 4:
+               switch (face) {
+                  case PIPE_TEX_FACE_POS_X:
+                  case PIPE_TEX_FACE_NEG_X:
+                     x += step_offsets[face][0] * d;
+                     y += step_offsets[face][1] * d;
+                     break;
+                  case PIPE_TEX_FACE_POS_Y:
+                  case PIPE_TEX_FACE_NEG_Y:
+                     y += 12;
+                     x -= 8;
+                     break;
+                  case PIPE_TEX_FACE_POS_Z:
+                  case PIPE_TEX_FACE_NEG_Z:
+                     y = tex->total_height - 4;
+                     x = (face - 4) * 8;
+                     break;
+               }
+
+            case 2:
+               y = tex->total_height - 4;
+               x = 16 + face * 8;
+               break;
+
+            case 1:
+               x += 48;
+               break;
+
+            default:
+               x += step_offsets[face][0] * d;
+               y += step_offsets[face][1] * d;
+               break;
+         }
+      }
+   }
+}
 
 static boolean
 i915_miptree_layout(struct i915_texture * tex)
@@ -372,99 +475,15 @@ i945_miptree_layout(struct i915_texture * tex)
    unsigned level;
 
    switch (pt->target) {
-   case PIPE_TEXTURE_CUBE:{
-         const unsigned dim = pt->width[0];
-         unsigned face;
-         unsigned lvlWidth = pt->width[0], lvlHeight = pt->height[0];
-
-         assert(lvlWidth == lvlHeight); /* cubemap images are square */
-
-         /* Depending on the size of the largest images, pitch can be
-          * determined either by the old-style packing of cubemap faces,
-          * or the final row of 4x4, 2x2 and 1x1 faces below this. 
-          */
-         if (dim > 32)
-            tex->pitch = ((dim * pt->cpp * 2 + 3) & ~3) / pt->cpp;
-         else
-            tex->pitch = 14 * 8;
-
-         tex->total_height = dim * 4 + 4;
-
-         /* Set all the levels to effectively occupy the whole rectangular region. 
-          */
-         for (level = 0; level <= pt->last_level; level++) {
-            i915_miptree_set_level_info(tex, level, 6,
-                                         0, 0,
-                                         lvlWidth, lvlHeight, 1);
-	    lvlWidth /= 2;
-	    lvlHeight /= 2;
-	 }
-
-
-         for (face = 0; face < 6; face++) {
-            unsigned x = initial_offsets[face][0] * dim;
-            unsigned y = initial_offsets[face][1] * dim;
-            unsigned d = dim;
-
-            if (dim == 4 && face >= 4) {
-               y = tex->total_height - 4;
-               x = (face - 4) * 8;
-            }
-            else if (dim < 4 && (face > 0)) {
-               y = tex->total_height - 4;
-               x = face * 8;
-            }
-
-            for (level = 0; level <= pt->last_level; level++) {
-               i915_miptree_set_image_offset(tex, level, face, x, y);
-
-               d >>= 1;
-
-               switch (d) {
-               case 4:
-                  switch (face) {
-                  case PIPE_TEX_FACE_POS_X:
-                  case PIPE_TEX_FACE_NEG_X:
-                     x += step_offsets[face][0] * d;
-                     y += step_offsets[face][1] * d;
-                     break;
-                  case PIPE_TEX_FACE_POS_Y:
-                  case PIPE_TEX_FACE_NEG_Y:
-                     y += 12;
-                     x -= 8;
-                     break;
-                  case PIPE_TEX_FACE_POS_Z:
-                  case PIPE_TEX_FACE_NEG_Z:
-                     y = tex->total_height - 4;
-                     x = (face - 4) * 8;
-                     break;
-                  }
-
-               case 2:
-                  y = tex->total_height - 4;
-                  x = 16 + face * 8;
-                  break;
-
-               case 1:
-                  x += 48;
-                  break;
-
-               default:
-                  x += step_offsets[face][0] * d;
-                  y += step_offsets[face][1] * d;
-                  break;
-               }
-            }
-         }
-         break;
-      }
+   case PIPE_TEXTURE_CUBE:
+      i945_miptree_layout_cube(tex);
+      break;
    case PIPE_TEXTURE_3D:{
          unsigned width = pt->width[0];
          unsigned height = pt->height[0];
          unsigned depth = pt->depth[0];
          unsigned pack_x_pitch, pack_x_nr;
          unsigned pack_y_pitch;
-         unsigned level;
 
          tex->pitch = ((pt->width[0] * pt->cpp + 3) & ~3) / pt->cpp;
          tex->total_height = 0;
@@ -602,11 +621,6 @@ i915_texture_release(struct pipe_screen *screen,
    *pt = NULL;
 }
 
-
-
-/*
- * XXX note: same as code in sp_surface.c
- */
 static struct pipe_surface *
 i915_get_tex_surface(struct pipe_screen *screen,
                      struct pipe_texture *pt,
@@ -631,7 +645,7 @@ i915_get_tex_surface(struct pipe_screen *screen,
       assert(zslice == 0);
    }
 
-   ps = CALLOC_STRUCT(pipe_surface);//ws->surface_alloc(ws);
+   ps = CALLOC_STRUCT(pipe_surface);
    if (ps) {
       ps->refcount = 1;
       ps->winsys = ws;
@@ -649,7 +663,6 @@ i915_get_tex_surface(struct pipe_screen *screen,
    return ps;
 }
 
-
 void
 i915_init_texture_functions(struct i915_context *i915)
 {