Hide texture layout details from the state tracker.

pipe->get_tex_surface() has to be used for access to texture image data.

1 files changed, 425 insertions, 0 deletions

diff --git a/src/mesa/pipe/softpipe/sp_texture.c b/src/mesa/pipe/softpipe/sp_texture.c
new file mode 100644
index 00000000000..2f9a1e9837b
--- /dev/null
+++ b/src/mesa/pipe/softpipe/sp_texture.c
@@ -0,0 +1,425 @@
+/**************************************************************************
+ * 
+ * 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 <[email protected]>
+  *   Michel Dänzer <[email protected]>
+  */
+
+#include "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_util.h"
+#include "pipe/p_winsys.h"
+
+#include "sp_context.h"
+#include "sp_state.h"
+#include "sp_texture.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 unsigned minify( unsigned 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 softpipe_texture *spt,
+			  unsigned level,
+			  unsigned nr_images,
+			  unsigned x, unsigned y, unsigned w, unsigned h,
+			  unsigned d)
+{
+   struct pipe_texture *pt = &spt->base;
+
+   assert(level < PIPE_MAX_TEXTURE_LEVELS);
+
+   pt->width[level] = w;
+   pt->height[level] = h;
+   pt->depth[level] = d;
+
+   spt->nr_images[level] = nr_images;
+   spt->level_offset[level] = (x + y * spt->pitch) * pt->cpp;
+
+   /*
+   DBG("%s level %d size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
+       level, w, h, d, x, y, spt->level_offset[level]);
+   */
+
+   /* Not sure when this would happen, but anyway: 
+    */
+   if (spt->image_offset[level]) {
+      FREE( spt->image_offset[level] );
+      spt->image_offset[level] = NULL;
+   }
+
+   assert(nr_images);
+   assert(!spt->image_offset[level]);
+
+   spt->image_offset[level] = (unsigned *) MALLOC( nr_images * sizeof(unsigned) );
+   spt->image_offset[level][0] = 0;
+}
+
+
+static void
+sp_miptree_set_image_offset(struct softpipe_texture *spt,
+			    unsigned level, unsigned img, unsigned x, unsigned y)
+{
+   if (img == 0 && level == 0)
+      assert(x == 0 && y == 0);
+
+   assert(img < spt->nr_images[level]);
+
+   spt->image_offset[level][img] = (x + y * spt->pitch);
+
+   /*
+   DBG("%s level %d img %d pos %d,%d image_offset %x\n",
+       __FUNCTION__, level, img, x, y, spt->image_offset[level][img]);
+   */
+}
+
+
+static void
+sp_miptree_layout_2d( struct softpipe_texture *spt )
+{
+   struct pipe_texture *pt = &spt->base;
+   int align_h = 2, align_w = 4;
+   unsigned level;
+   unsigned x = 0;
+   unsigned y = 0;
+   unsigned width = pt->width[0];
+   unsigned height = pt->height[0];
+
+   spt->pitch = pt->width[0];
+   /* XXX FIX THIS:
+    * we use alignment=64 bytes in sp_region_alloc(). If we change
+    * that, change this too.
+    */
+   if (spt->pitch < 16)
+      spt->pitch = 16;
+
+   /* 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 (pt->first_level != pt->last_level) {
+      unsigned mip1_width = align(minify(pt->width[0]), align_w)
+			+ minify(minify(pt->width[0]));
+
+      if (mip1_width > pt->width[0])
+	 spt->pitch = mip1_width;
+   }
+
+   /* Pitch must be a whole number of dwords, even though we
+    * express it in texels.
+    */
+   spt->pitch = align(spt->pitch * pt->cpp, 4) / pt->cpp;
+   spt->total_height = 0;
+
+   for ( level = pt->first_level ; level <= pt->last_level ; level++ ) {
+      unsigned img_height;
+
+      sp_miptree_set_level_info(spt, level, 1, x, y, width, height, 1);
+
+      if (pt->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:
+       */
+      spt->total_height = MAX2(spt->total_height, y + img_height);
+
+      /* Layout_below: step right after second mipmap.
+       */
+      if (level == pt->first_level + 1) {
+	 x += align(width, align_w);
+      }
+      else {
+	 y += img_height;
+      }
+
+      width  = minify(width);
+      height = minify(height);
+   }
+}
+
+
+static const int initial_offsets[6][2] = {
+   {0, 0},
+   {0, 2},
+   {1, 0},
+   {1, 2},
+   {1, 1},
+   {1, 3}
+};
+
+static const int step_offsets[6][2] = {
+   {0, 2},
+   {0, 2},
+   {-1, 2},
+   {-1, 2},
+   {-1, 1},
+   {-1, 1}
+};
+
+
+
+static boolean
+softpipe_mipmap_tree_layout(struct pipe_context *pipe, struct softpipe_texture * spt)
+{
+   struct pipe_texture *pt = &spt->base;
+   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)
+            spt->pitch = ((dim * pt->cpp * 2 + 3) & ~3) / pt->cpp;
+         else
+            spt->pitch = 14 * 8;
+
+         spt->total_height = dim * 4 + 4;
+
+         /* Set all the levels to effectively occupy the whole rectangular region. 
+          */
+         for (level = pt->first_level; level <= pt->last_level; level++) {
+            sp_miptree_set_level_info(spt, 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 = spt->total_height - 4;
+               x = (face - 4) * 8;
+            }
+            else if (dim < 4 && (face > 0 || pt->first_level > 0)) {
+               y = spt->total_height - 4;
+               x = face * 8;
+            }
+
+            for (level = pt->first_level; level <= pt->last_level; level++) {
+               sp_miptree_set_image_offset(spt, 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 = spt->total_height - 4;
+                     x = (face - 4) * 8;
+                     break;
+                  }
+
+               case 2:
+                  y = spt->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_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;
+
+         spt->pitch = ((pt->width[0] * pt->cpp + 3) & ~3) / pt->cpp;
+         spt->total_height = 0;
+
+         pack_y_pitch = MAX2(pt->height[0], 2);
+         pack_x_pitch = spt->pitch;
+         pack_x_nr = 1;
+
+         for (level = pt->first_level; level <= pt->last_level; level++) {
+            unsigned nr_images = pt->target == PIPE_TEXTURE_3D ? depth : 6;
+            int x = 0;
+            int y = 0;
+            unsigned q, j;
+
+            sp_miptree_set_level_info(spt, level, nr_images,
+				      0, spt->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(spt, level, q, x, y);
+                  x += pack_x_pitch;
+               }
+
+               x = 0;
+               y += pack_y_pitch;
+            }
+
+
+            spt->total_height += y;
+
+            if (pack_x_pitch > 4) {
+               pack_x_pitch >>= 1;
+               pack_x_nr <<= 1;
+               assert(pack_x_pitch * pack_x_nr <= spt->pitch);
+            }
+
+            if (pack_y_pitch > 2) {
+               pack_y_pitch >>= 1;
+            }
+
+            width = minify(width);
+            height = minify(height);
+            depth = minify(depth);
+         }
+         break;
+      }
+
+   case PIPE_TEXTURE_1D:
+   case PIPE_TEXTURE_2D:
+//   case PIPE_TEXTURE_RECTANGLE:
+         sp_miptree_layout_2d(spt);
+         break;
+   default:
+      assert(0);
+      break;
+   }
+
+   /*
+   DBG("%s: %dx%dx%d - sz 0x%x\n", __FUNCTION__,
+       spt->pitch,
+       spt->total_height, pt->cpp, spt->pitch * spt->total_height * pt->cpp);
+   */
+
+   return TRUE;
+}
+
+void
+softpipe_texture_create(struct pipe_context *pipe, struct pipe_texture **pt)
+{
+   struct softpipe_texture *spt = REALLOC(*pt, sizeof(struct pipe_texture),
+					  sizeof(struct softpipe_texture));
+
+   if (spt) {
+      memset(&spt->base + 1, 0,
+	     sizeof(struct softpipe_texture) - sizeof(struct pipe_texture));
+
+      if (softpipe_mipmap_tree_layout(pipe, spt)) {
+	 spt->region = pipe->winsys->region_alloc(pipe->winsys,
+						  spt->pitch * (*pt)->cpp *
+						  spt->total_height,
+						  PIPE_SURFACE_FLAG_TEXTURE);
+      }
+
+      if (!spt->region) {
+	 FREE(spt);
+	 spt = NULL;
+      }
+   }
+
+   *pt = &spt->base;
+}
+
+void
+softpipe_texture_release(struct pipe_context *pipe, struct pipe_texture **pt)
+{
+   if (!*pt)
+      return;
+
+   /*
+   DBG("%s %p refcount will be %d\n",
+       __FUNCTION__, (void *) *pt, (*pt)->refcount - 1);
+   */
+   if (--(*pt)->refcount <= 0) {
+      struct softpipe_texture *spt = (struct softpipe_texture *)*pt;
+      uint i;
+
+      /*
+      DBG("%s deleting %p\n", __FUNCTION__, (void *) spt);
+      */
+
+      pipe->winsys->region_release(pipe->winsys, &spt->region);
+
+      for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS; i++)
+         if (spt->image_offset[i])
+            free(spt->image_offset[i]);
+
+      free(spt);
+   }
+   *pt = NULL;
+}