1 files changed, 370 insertions, 0 deletions

diff --git a/src/gallium/drivers/softpipe/sp_texture.c b/src/gallium/drivers/softpipe/sp_texture.c
new file mode 100644
index 0000000000..a64dc89f43
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_texture.c
@@ -0,0 +1,370 @@
+/**************************************************************************
+ * 
+ * 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 "pipe/p_context.h"
+#include "pipe/p_defines.h"
+#include "pipe/p_inlines.h"
+#include "pipe/p_winsys.h"
+#include "util/u_math.h"
+#include "util/u_memory.h"
+
+#include "sp_context.h"
+#include "sp_state.h"
+#include "sp_texture.h"
+#include "sp_tile_cache.h"
+#include "sp_screen.h"
+
+
+/* Simple, maximally packed layout.
+ */
+
+static unsigned minify( unsigned d )
+{
+   return MAX2(1, d>>1);
+}
+
+
+/* Conventional allocation path for non-display textures:
+ */
+static boolean
+softpipe_texture_layout(struct pipe_screen *screen,
+                        struct softpipe_texture * spt)
+{
+   struct pipe_winsys *ws = screen->winsys;
+   struct pipe_texture *pt = &spt->base;
+   unsigned level;
+   unsigned width = pt->width[0];
+   unsigned height = pt->height[0];
+   unsigned depth = pt->depth[0];
+
+   unsigned buffer_size = 0;
+
+   for (level = 0; level <= pt->last_level; level++) {
+      pt->width[level] = width;
+      pt->height[level] = height;
+      pt->depth[level] = depth;
+      pt->nblocksx[level] = pf_get_nblocksx(&pt->block, width);  
+      pt->nblocksy[level] = pf_get_nblocksy(&pt->block, height);  
+      spt->stride[level] = pt->nblocksx[level]*pt->block.size;
+
+      spt->level_offset[level] = buffer_size;
+
+      buffer_size += (pt->nblocksy[level] *
+                      ((pt->target == PIPE_TEXTURE_CUBE) ? 6 : depth) *
+                      spt->stride[level]);
+
+      width  = minify(width);
+      height = minify(height);
+      depth = minify(depth);
+   }
+
+   spt->buffer = ws->buffer_create(ws, 32,
+                                   PIPE_BUFFER_USAGE_PIXEL,
+                                   buffer_size);
+
+   return spt->buffer != NULL;
+}
+
+/* Hack it up to use the old winsys->surface_alloc_storage()
+ * method for now:
+ */
+static boolean
+softpipe_displaytarget_layout(struct pipe_screen *screen,
+                              struct softpipe_texture * spt)
+{
+   struct pipe_winsys *ws = screen->winsys;
+   struct pipe_surface surf;
+   unsigned flags = (PIPE_BUFFER_USAGE_CPU_READ |
+                     PIPE_BUFFER_USAGE_CPU_WRITE |
+                     PIPE_BUFFER_USAGE_GPU_READ |
+                     PIPE_BUFFER_USAGE_GPU_WRITE);
+   int ret;
+
+
+   memset(&surf, 0, sizeof(surf));
+
+   ret =ws->surface_alloc_storage( ws, 
+                                   &surf,
+                                   spt->base.width[0], 
+                                   spt->base.height[0],
+                                   spt->base.format,
+                                   flags,
+                                   spt->base.tex_usage);
+   if(ret != 0)
+      return FALSE;
+
+   if (!surf.buffer) {
+      /* allocation failed */
+      return FALSE;
+   }
+
+   /* Now extract the goodies: 
+    */
+   spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);  
+   spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);  
+   spt->stride[0] = surf.stride;
+
+   /* Transfer the reference:
+    */
+   spt->buffer = surf.buffer;
+   surf.buffer = NULL;
+
+   return spt->buffer != NULL;
+}
+
+
+
+
+
+static struct pipe_texture *
+softpipe_texture_create(struct pipe_screen *screen,
+                        const struct pipe_texture *templat)
+{
+   struct softpipe_texture *spt = CALLOC_STRUCT(softpipe_texture);
+   if (!spt)
+      return NULL;
+
+   spt->base = *templat;
+   spt->base.refcount = 1;
+   spt->base.screen = screen;
+
+   if (spt->base.tex_usage & PIPE_TEXTURE_USAGE_DISPLAY_TARGET) {
+      if (!softpipe_displaytarget_layout(screen, spt))
+         goto fail;
+   }
+   else {
+      if (!softpipe_texture_layout(screen, spt))
+         goto fail;
+   }
+    
+   assert(spt->base.refcount == 1);
+   return &spt->base;
+
+ fail:
+   FREE(spt);
+   return NULL;
+}
+
+
+static struct pipe_texture *
+softpipe_texture_blanket(struct pipe_screen * screen,
+                         const struct pipe_texture *base,
+                         const unsigned *stride,
+                         struct pipe_buffer *buffer)
+{
+   struct softpipe_texture *spt;
+   assert(screen);
+
+   /* Only supports one type */
+   if (base->target != PIPE_TEXTURE_2D ||
+       base->last_level != 0 ||
+       base->depth[0] != 1) {
+      return NULL;
+   }
+
+   spt = CALLOC_STRUCT(softpipe_texture);
+   if (!spt)
+      return NULL;
+
+   spt->base = *base;
+   spt->base.refcount = 1;
+   spt->base.screen = screen;
+   spt->base.nblocksx[0] = pf_get_nblocksx(&spt->base.block, spt->base.width[0]);  
+   spt->base.nblocksy[0] = pf_get_nblocksy(&spt->base.block, spt->base.height[0]);  
+   spt->stride[0] = stride[0];
+
+   pipe_buffer_reference(screen, &spt->buffer, buffer);
+
+   return &spt->base;
+}
+
+
+static void
+softpipe_texture_release(struct pipe_screen *screen,
+                         struct pipe_texture **pt)
+{
+   if (!*pt)
+      return;
+
+   if (--(*pt)->refcount <= 0) {
+      struct softpipe_texture *spt = softpipe_texture(*pt);
+
+      pipe_buffer_reference(screen, &spt->buffer, NULL);
+      FREE(spt);
+   }
+   *pt = NULL;
+}
+
+
+static struct pipe_surface *
+softpipe_get_tex_surface(struct pipe_screen *screen,
+                         struct pipe_texture *pt,
+                         unsigned face, unsigned level, unsigned zslice,
+                         unsigned usage)
+{
+   struct pipe_winsys *ws = screen->winsys;
+   struct softpipe_texture *spt = softpipe_texture(pt);
+   struct pipe_surface *ps;
+
+   assert(level <= pt->last_level);
+
+   ps = CALLOC_STRUCT(pipe_surface);
+   ps->refcount = 1;
+   if (ps) {
+      assert(ps->refcount);
+      pipe_texture_reference(&ps->texture, pt);
+      pipe_buffer_reference(screen, &ps->buffer, spt->buffer);
+      ps->format = pt->format;
+      ps->block = pt->block;
+      ps->width = pt->width[level];
+      ps->height = pt->height[level];
+      ps->nblocksx = pt->nblocksx[level];
+      ps->nblocksy = pt->nblocksy[level];
+      ps->stride = spt->stride[level];
+      ps->offset = spt->level_offset[level];
+      ps->usage = usage;
+      
+      /* Because we are softpipe, anything that the state tracker
+       * thought was going to be done with the GPU will actually get
+       * done with the CPU.  Let's adjust the flags to take that into
+       * account.
+       */
+      if (ps->usage & PIPE_BUFFER_USAGE_GPU_WRITE) {
+         /* GPU_WRITE means "render" and that can involve reads (blending) */
+         ps->usage |= PIPE_BUFFER_USAGE_CPU_WRITE | PIPE_BUFFER_USAGE_CPU_READ;
+      }
+
+      if (ps->usage & PIPE_BUFFER_USAGE_GPU_READ)
+         ps->usage |= PIPE_BUFFER_USAGE_CPU_READ;
+
+      if (ps->usage & (PIPE_BUFFER_USAGE_CPU_WRITE |
+                       PIPE_BUFFER_USAGE_GPU_WRITE)) {
+         /* Mark the surface as dirty.  The tile cache will look for this. */
+         spt->modified = TRUE;
+      }
+
+      ps->face = face;
+      ps->level = level;
+      ps->zslice = zslice;
+
+      if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
+         ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
+            ps->nblocksy *
+            ps->stride;
+      }
+      else {
+         assert(face == 0);
+         assert(zslice == 0);
+      }
+   }
+   return ps;
+}
+
+
+static void 
+softpipe_tex_surface_release(struct pipe_screen *screen, 
+                             struct pipe_surface **s)
+{
+   struct pipe_surface *surf = *s;
+   /* Effectively do the texture_update work here - if texture images
+    * needed post-processing to put them into hardware layout, this is
+    * where it would happen.  For softpipe, nothing to do.
+    */
+   assert ((*s)->texture);
+   if (--surf->refcount == 0) {
+      pipe_texture_reference(&surf->texture, NULL); 
+      pipe_buffer_reference(screen, &surf->buffer, NULL);
+      FREE(surf);
+   }
+   *s = NULL;
+}
+
+
+static void *
+softpipe_surface_map( struct pipe_screen *screen,
+                      struct pipe_surface *surface,
+                      unsigned flags )
+{
+   ubyte *map;
+
+   if (flags & ~surface->usage) {
+      assert(0);
+      return NULL;
+   }
+
+   map = pipe_buffer_map( screen, surface->buffer, flags );
+   if (map == NULL)
+      return NULL;
+
+   /* May want to different things here depending on read/write nature
+    * of the map:
+    */
+   if (surface->texture &&
+       (flags & PIPE_BUFFER_USAGE_CPU_WRITE)) 
+   {
+      /* Do something to notify sharing contexts of a texture change.
+       * In softpipe, that would mean flushing the texture cache.
+       */
+      softpipe_screen(screen)->timestamp++;
+   }
+   
+   return map + surface->offset;
+}
+
+
+static void
+softpipe_surface_unmap(struct pipe_screen *screen,
+                       struct pipe_surface *surface)
+{
+   pipe_buffer_unmap( screen, surface->buffer );
+}
+
+
+void
+softpipe_init_texture_funcs(struct softpipe_context *sp)
+{
+}
+
+
+void
+softpipe_init_screen_texture_funcs(struct pipe_screen *screen)
+{
+   screen->texture_create = softpipe_texture_create;
+   screen->texture_blanket = softpipe_texture_blanket;
+   screen->texture_release = softpipe_texture_release;
+
+   screen->get_tex_surface = softpipe_get_tex_surface;
+   screen->tex_surface_release = softpipe_tex_surface_release;
+
+   screen->surface_map = softpipe_surface_map;
+   screen->surface_unmap = softpipe_surface_unmap;
+}