gallium: WIP: Introduce sampler views.

5 files changed, 204 insertions, 20 deletions

diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index 18f8606818..29060a1eff 100644
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -45,6 +45,7 @@
 #include "util/u_draw_quad.h"
 #include "util/u_pack_color.h"
 #include "util/u_rect.h"
+#include "util/u_sampler.h"
 #include "util/u_simple_shaders.h"
 #include "util/u_texture.h"
 
@@ -93,6 +94,8 @@ struct blitter_context_priv
 
    /* Rasterizer state. */
    void *rs_state;
+
+   struct pipe_sampler_view *sampler_view;
 };
 
 struct blitter_context *util_blitter_create(struct pipe_context *pipe)
@@ -117,7 +120,7 @@ struct blitter_context *util_blitter_create(struct pipe_context *pipe)
    ctx->blitter.saved_fs = INVALID_PTR;
    ctx->blitter.saved_vs = INVALID_PTR;
    ctx->blitter.saved_fb_state.nr_cbufs = ~0;
-   ctx->blitter.saved_num_textures = ~0;
+   ctx->blitter.saved_num_sampler_views = ~0;
    ctx->blitter.saved_num_sampler_states = ~0;
 
    /* blend state objects */
@@ -230,6 +233,10 @@ void util_blitter_destroy(struct blitter_context *blitter)
       if (ctx->sampler_state[i])
          pipe->delete_sampler_state(pipe, ctx->sampler_state[i]);
 
+   if (ctx->sampler_view) {
+      pipe_sampler_view_reference(&ctx->sampler_view, NULL);
+   }
+
    pipe_buffer_reference(&ctx->vbuf, NULL);
    FREE(ctx);
 }
@@ -277,11 +284,11 @@ static void blitter_restore_CSOs(struct blitter_context_priv *ctx)
       ctx->blitter.saved_num_sampler_states = ~0;
    }
 
-   if (ctx->blitter.saved_num_textures != ~0) {
-      pipe->set_fragment_sampler_textures(pipe,
-                                          ctx->blitter.saved_num_textures,
-                                          ctx->blitter.saved_textures);
-      ctx->blitter.saved_num_textures = ~0;
+   if (ctx->blitter.saved_num_sampler_views != ~0) {
+      pipe->set_fragment_sampler_views(pipe,
+                                       ctx->blitter.saved_num_sampler_views,
+                                       ctx->blitter.saved_sampler_views);
+      ctx->blitter.saved_num_sampler_views = ~0;
    }
 }
 
@@ -577,9 +584,10 @@ static void util_blitter_do_copy(struct blitter_context *blitter,
    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
    struct pipe_context *pipe = ctx->pipe;
    struct pipe_framebuffer_state fb_state;
+   struct pipe_sampler_view viewTempl, *view;
 
    assert(blitter->saved_fb_state.nr_cbufs != ~0);
-   assert(blitter->saved_num_textures != ~0);
+   assert(blitter->saved_num_sampler_views != ~0);
    assert(blitter->saved_num_sampler_states != ~0);
    assert(src->texture->target < PIPE_MAX_TEXTURE_TYPES);
 
@@ -607,11 +615,23 @@ static void util_blitter_do_copy(struct blitter_context *blitter,
       fb_state.zsbuf = 0;
    }
 
+   u_sampler_view_default_template(&viewTempl,
+                                   src->texture,
+                                   src->texture->format);
+   view = pipe->create_sampler_view(pipe,
+                                    src->texture,
+                                    &viewTempl);
+
+   if (ctx->sampler_view) {
+      pipe_sampler_view_reference(&ctx->sampler_view, NULL);
+   }
+   ctx->sampler_view = view;
+
    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
    pipe->bind_vs_state(pipe, ctx->vs_tex);
    pipe->bind_fragment_sampler_states(pipe, 1,
       blitter_get_sampler_state(ctx, src->level));
-   pipe->set_fragment_sampler_textures(pipe, 1, &src->texture);
+   pipe->set_fragment_sampler_views(pipe, 1, &view);
    pipe->set_framebuffer_state(pipe, &fb_state);
 
    /* set texture coordinates */
diff --git a/src/gallium/auxiliary/util/u_blitter.h b/src/gallium/auxiliary/util/u_blitter.h
index a2f17073ac..9911948560 100644
--- a/src/gallium/auxiliary/util/u_blitter.h
+++ b/src/gallium/auxiliary/util/u_blitter.h
@@ -50,10 +50,10 @@ struct blitter_context
    struct pipe_stencil_ref saved_stencil_ref;     /**< stencil ref */
 
    int saved_num_sampler_states;
-   void *saved_sampler_states[32];
+   void *saved_sampler_states[PIPE_MAX_SAMPLERS];
 
-   int saved_num_textures;
-   struct pipe_texture *saved_textures[32]; /* is 32 enough? */
+   int saved_num_sampler_views;
+   struct pipe_sampler_view *saved_sampler_views[PIPE_MAX_SAMPLERS];
 };
 
 /**
@@ -218,17 +218,17 @@ void util_blitter_save_fragment_sampler_states(
           num_sampler_states * sizeof(void *));
 }
 
-static INLINE
-void util_blitter_save_fragment_sampler_textures(
-                  struct blitter_context *blitter,
-                  int num_textures,
-                  struct pipe_texture **textures)
+static INLINE void
+util_blitter_save_fragment_sampler_views(struct blitter_context *blitter,
+                                         int num_views,
+                                         struct pipe_sampler_view **views)
 {
-   assert(num_textures <= Elements(blitter->saved_textures));
+   assert(num_views <= Elements(blitter->saved_sampler_views));
 
-   blitter->saved_num_textures = num_textures;
-   memcpy(blitter->saved_textures, textures,
-          num_textures * sizeof(struct pipe_texture *));
+   blitter->saved_num_sampler_views = num_views;
+   memcpy(blitter->saved_sampler_views,
+          views,
+          num_views * sizeof(struct pipe_sampler_view *));
 }
 
 #ifdef __cplusplus
diff --git a/src/gallium/auxiliary/util/u_inlines.h b/src/gallium/auxiliary/util/u_inlines.h
index e95d58ea86..f8dfea4e51 100644
--- a/src/gallium/auxiliary/util/u_inlines.h
+++ b/src/gallium/auxiliary/util/u_inlines.h
@@ -117,6 +117,16 @@ pipe_texture_reference(struct pipe_texture **ptr, struct pipe_texture *tex)
    *ptr = tex;
 }
 
+static INLINE void
+pipe_sampler_view_reference(struct pipe_sampler_view **ptr, struct pipe_sampler_view *view)
+{
+   struct pipe_sampler_view *old_view = *ptr;
+
+   if (pipe_reference(&(*ptr)->reference, &view->reference))
+      old_view->context->sampler_view_destroy(old_view->context, old_view);
+   *ptr = view;
+}
+
 
 /*
  * Convenience wrappers for screen buffer functions.
diff --git a/src/gallium/auxiliary/util/u_sampler.c b/src/gallium/auxiliary/util/u_sampler.c
new file mode 100644
index 0000000000..3e45a2fa70
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_sampler.c
@@ -0,0 +1,97 @@
+/**************************************************************************
+ *
+ * Copyright 2010 VMware, Inc.
+ * 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 VMWARE 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.
+ *
+ **************************************************************************/
+
+
+#include "u_format.h"
+#include "u_sampler.h"
+
+
+static void
+default_template(struct pipe_sampler_view *view,
+                 const struct pipe_texture *texture,
+                 enum pipe_format format,
+                 unsigned expand_green_blue)
+{
+   /* XXX: Check if format is compatible with texture->format.
+    */
+
+   view->format = format;
+   view->first_level = 0;
+   view->num_levels = texture->last_level + 1;
+   view->swizzle_r = PIPE_SWIZZLE_RED;
+   view->swizzle_g = PIPE_SWIZZLE_GREEN;
+   view->swizzle_b = PIPE_SWIZZLE_BLUE;
+   view->swizzle_a = PIPE_SWIZZLE_ALPHA;
+
+   /* Override default green and blue component expansion to the requested one.
+    *
+    * Gallium expands nonexistent components to (0,0,0,1), DX9 expands to (1,1,1,1).
+    * Since alpha is always expanded to 1, and red is always present, we only really
+    * care about green and blue components.
+    *
+    * To make it look less hackish, one would have to add UTIL_FORMAT_SWIZZLE_EXPAND
+    * to indicate components for expansion and then override without exceptions or
+    * favoring one component over another.
+    */
+   if (format != PIPE_FORMAT_A8_UNORM) {
+      const struct util_format_description *desc = util_format_description(format);
+
+      assert(desc);
+      if (desc) {
+         if (desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_0) {
+            view->swizzle_g = expand_green_blue;
+         }
+         if (desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_0) {
+            view->swizzle_b = expand_green_blue;
+         }
+      }
+   }
+}
+
+void
+u_sampler_view_default_template(struct pipe_sampler_view *view,
+                                const struct pipe_texture *texture,
+                                enum pipe_format format)
+{
+   /* Expand to (0, 0, 0, 1) */
+   default_template(view,
+                    texture,
+                    format,
+                    PIPE_SWIZZLE_ZERO);
+}
+
+void
+u_sampler_view_default_dx9_template(struct pipe_sampler_view *view,
+                                    const struct pipe_texture *texture,
+                                    enum pipe_format format)
+{
+   /* Expand to (1, 1, 1, 1) */
+   default_template(view,
+                    texture,
+                    format,
+                    PIPE_SWIZZLE_ONE);
+}
diff --git a/src/gallium/auxiliary/util/u_sampler.h b/src/gallium/auxiliary/util/u_sampler.h
new file mode 100644
index 0000000000..bdd061c851
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_sampler.h
@@ -0,0 +1,57 @@
+/**************************************************************************
+ *
+ * Copyright 2010 VMware, Inc.
+ * 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 VMWARE 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.
+ *
+ **************************************************************************/
+
+
+#ifndef U_SAMPLER_H
+#define U_SAMPLER_H
+
+
+#include "pipe/p_defines.h"
+#include "pipe/p_format.h"
+#include "pipe/p_state.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+void
+u_sampler_view_default_template(struct pipe_sampler_view *view,
+                                const struct pipe_texture *texture,
+                                enum pipe_format format);
+
+void
+u_sampler_view_default_dx9_template(struct pipe_sampler_view *view,
+                                    const struct pipe_texture *texture,
+                                    enum pipe_format format);
+
+
+#ifdef __cplusplus
+} /* extern "C" { */
+#endif
+
+#endif /* U_SAMPLER_H */