Give softpipe a native texture layout of its own.

Basically the same as the 945's for now.

1 files changed, 344 insertions, 3 deletions

diff --git a/src/mesa/pipe/softpipe/sp_tex_layout.c b/src/mesa/pipe/softpipe/sp_tex_layout.c
index 2bbdca0f58..37969c84de 100644
--- a/src/mesa/pipe/softpipe/sp_tex_layout.c
+++ b/src/mesa/pipe/softpipe/sp_tex_layout.c
@@ -1,13 +1,354 @@
+/**************************************************************************
+ * 
+ * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+ /*
+  * Authors:
+  *   Keith Whitwell <keith@tungstengraphics.com>
+  *   Michel Dänzer <michel@tungstengraphics.com>
+  */
 
+#include "macros.h"
 #include "pipe/p_state.h"
+#include "pipe/p_context.h"
 #include "sp_tex_layout.h"
 
 
+/* At the moment, just make softpipe use the same layout for its
+ * textures as the i945.  Softpipe needs some sort of texture layout,
+ * this one was handy.  May be worthwhile to simplify this code a
+ * little.
+ */
+
+static GLuint minify( GLuint d )
+{
+   return MAX2(1, d>>1);
+}
+
+static int align(int value, int alignment)
+{
+   return (value + alignment - 1) & ~(alignment - 1);
+}
+
+
+static void
+sp_miptree_set_level_info(struct pipe_mipmap_tree *mt,
+                             GLuint level,
+                             GLuint nr_images,
+                             GLuint x, GLuint y, GLuint w, GLuint h, GLuint d)
+{
+   assert(level < MAX_TEXTURE_LEVELS);
+
+   mt->level[level].width = w;
+   mt->level[level].height = h;
+   mt->level[level].depth = d;
+   mt->level[level].level_offset = (x + y * mt->pitch) * mt->cpp;
+   mt->level[level].nr_images = nr_images;
+
+   /*
+   DBG("%s level %d size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
+       level, w, h, d, x, y, mt->level[level].level_offset);
+   */
+
+   /* Not sure when this would happen, but anyway: 
+    */
+   if (mt->level[level].image_offset) {
+      free(mt->level[level].image_offset);
+      mt->level[level].image_offset = NULL;
+   }
+
+   assert(nr_images);
+   assert(!mt->level[level].image_offset);
+
+   mt->level[level].image_offset = (GLuint *) malloc(nr_images * sizeof(GLuint));
+   mt->level[level].image_offset[0] = 0;
+}
+
+
+static void
+sp_miptree_set_image_offset(struct pipe_mipmap_tree *mt,
+                               GLuint level, GLuint img, GLuint x, GLuint y)
+{
+   if (img == 0 && level == 0)
+      assert(x == 0 && y == 0);
+
+   assert(img < mt->level[level].nr_images);
+
+   mt->level[level].image_offset[img] = (x + y * mt->pitch);
+
+   /*
+   DBG("%s level %d img %d pos %d,%d image_offset %x\n",
+       __FUNCTION__, level, img, x, y, mt->level[level].image_offset[img]);
+   */
+}
+
+
+static void
+sp_miptree_layout_2d( struct pipe_mipmap_tree *mt )
+{
+   GLint align_h = 2, align_w = 4;
+   GLuint level;
+   GLuint x = 0;
+   GLuint y = 0;
+   GLuint width = mt->width0;
+   GLuint height = mt->height0;
+
+   mt->pitch = mt->width0;
+
+   /* May need to adjust pitch to accomodate the placement of
+    * the 2nd mipmap.  This occurs when the alignment
+    * constraints of mipmap placement push the right edge of the
+    * 2nd mipmap out past the width of its parent.
+    */
+   if (mt->first_level != mt->last_level) {
+      GLuint mip1_width = align(minify(mt->width0), align_w)
+			+ minify(minify(mt->width0));
+
+      if (mip1_width > mt->width0)
+	 mt->pitch = mip1_width;
+   }
+
+   /* Pitch must be a whole number of dwords, even though we
+    * express it in texels.
+    */
+   mt->pitch = align(mt->pitch * mt->cpp, 4) / mt->cpp;
+   mt->total_height = 0;
+
+   for ( level = mt->first_level ; level <= mt->last_level ; level++ ) {
+      GLuint img_height;
+
+      sp_miptree_set_level_info(mt, level, 1, x, y, width, height, 1);
+
+      if (mt->compressed)
+	 img_height = MAX2(1, height/4);
+      else
+	 img_height = align(height, align_h);
+
+
+      /* Because the images are packed better, the final offset
+       * might not be the maximal one:
+       */
+      mt->total_height = MAX2(mt->total_height, y + img_height);
+
+      /* Layout_below: step right after second mipmap.
+       */
+      if (level == mt->first_level + 1) {
+	 x += align(width, align_w);
+      }
+      else {
+	 y += img_height;
+      }
+
+      width  = minify(width);
+      height = minify(height);
+   }
+}
+
+
+static const GLint initial_offsets[6][2] = {
+   {0, 0},
+   {0, 2},
+   {1, 0},
+   {1, 2},
+   {1, 1},
+   {1, 3}
+};
+
+static const GLint step_offsets[6][2] = {
+   {0, 2},
+   {0, 2},
+   {-1, 2},
+   {-1, 2},
+   {-1, 1},
+   {-1, 1}
+};
+
+
+
 GLboolean
-softpipe_mipmap_tree_layout(struct pipe_context *pipe,
-                            struct pipe_mipmap_tree *mt)
+softpipe_mipmap_tree_layout(struct pipe_context *pipe, struct pipe_mipmap_tree * mt)
 {
+   GLint level;
+
+   switch (mt->target) {
+   case GL_TEXTURE_CUBE_MAP:{
+         const GLuint dim = mt->width0;
+         GLuint face;
+         GLuint lvlWidth = mt->width0, lvlHeight = mt->height0;
+
+         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)
+            mt->pitch = ((dim * mt->cpp * 2 + 3) & ~3) / mt->cpp;
+         else
+            mt->pitch = 14 * 8;
+
+         mt->total_height = dim * 4 + 4;
+
+         /* Set all the levels to effectively occupy the whole rectangular region. 
+          */
+         for (level = mt->first_level; level <= mt->last_level; level++) {
+            sp_miptree_set_level_info(mt, level, 6,
+                                         0, 0,
+                                         lvlWidth, lvlHeight, 1);
+	    lvlWidth /= 2;
+	    lvlHeight /= 2;
+	 }
+
+
+         for (face = 0; face < 6; face++) {
+            GLuint x = initial_offsets[face][0] * dim;
+            GLuint y = initial_offsets[face][1] * dim;
+            GLuint d = dim;
+
+            if (dim == 4 && face >= 4) {
+               y = mt->total_height - 4;
+               x = (face - 4) * 8;
+            }
+            else if (dim < 4 && (face > 0 || mt->first_level > 0)) {
+               y = mt->total_height - 4;
+               x = face * 8;
+            }
+
+            for (level = mt->first_level; level <= mt->last_level; level++) {
+               sp_miptree_set_image_offset(mt, level, face, x, y);
+
+               d >>= 1;
+
+               switch (d) {
+               case 4:
+                  switch (face) {
+                  case FACE_POS_X:
+                  case FACE_NEG_X:
+                     x += step_offsets[face][0] * d;
+                     y += step_offsets[face][1] * d;
+                     break;
+                  case FACE_POS_Y:
+                  case FACE_NEG_Y:
+                     y += 12;
+                     x -= 8;
+                     break;
+                  case FACE_POS_Z:
+                  case FACE_NEG_Z:
+                     y = mt->total_height - 4;
+                     x = (face - 4) * 8;
+                     break;
+                  }
+
+               case 2:
+                  y = mt->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 GL_TEXTURE_3D:{
+         GLuint width = mt->width0;
+         GLuint height = mt->height0;
+         GLuint depth = mt->depth0;
+         GLuint pack_x_pitch, pack_x_nr;
+         GLuint pack_y_pitch;
+         GLuint level;
+
+         mt->pitch = ((mt->width0 * mt->cpp + 3) & ~3) / mt->cpp;
+         mt->total_height = 0;
+
+         pack_y_pitch = MAX2(mt->height0, 2);
+         pack_x_pitch = mt->pitch;
+         pack_x_nr = 1;
+
+         for (level = mt->first_level; level <= mt->last_level; level++) {
+            GLuint nr_images = mt->target == GL_TEXTURE_3D ? depth : 6;
+            GLint x = 0;
+            GLint y = 0;
+            GLint q, j;
+
+            sp_miptree_set_level_info(mt, level, nr_images,
+                                         0, mt->total_height,
+                                         width, height, depth);
+
+            for (q = 0; q < nr_images;) {
+               for (j = 0; j < pack_x_nr && q < nr_images; j++, q++) {
+                  sp_miptree_set_image_offset(mt, level, q, x, y);
+                  x += pack_x_pitch;
+               }
+
+               x = 0;
+               y += pack_y_pitch;
+            }
+
+
+            mt->total_height += y;
+
+            if (pack_x_pitch > 4) {
+               pack_x_pitch >>= 1;
+               pack_x_nr <<= 1;
+               assert(pack_x_pitch * pack_x_nr <= mt->pitch);
+            }
+
+            if (pack_y_pitch > 2) {
+               pack_y_pitch >>= 1;
+            }
+
+            width = minify(width);
+            height = minify(height);
+            depth = minify(depth);
+         }
+         break;
+      }
+
+   case GL_TEXTURE_1D:
+   case GL_TEXTURE_2D:
+   case GL_TEXTURE_RECTANGLE_ARB:
+         sp_miptree_layout_2d(mt);
+         break;
+   default:
+      _mesa_problem(NULL, "Unexpected tex target in sp_miptree_layout()");
+   }
+
+   /*
+   DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
+       mt->pitch,
+       mt->total_height, mt->cpp, mt->pitch * mt->total_height * mt->cpp);
+   */
+
    return GL_TRUE;
 }
 
-