[Mesa-dev] [RFC PATCH 43/65] st/mesa: add infrastructure for storing bound texture/image handles

[Samuel Pitoiset]

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/mesa/state_tracker/st_context.c |  2 +
 src/mesa/state_tracker/st_context.h | 11 ++++++
 src/mesa/state_tracker/st_texture.c | 77 +++++++++++++++++++++++++++++++++++++
 src/mesa/state_tracker/st_texture.h |  5 +++
 4 files changed, 95 insertions(+)

diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index c901764668..4dcc160b50 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -292,6 +292,8 @@ st_destroy_context_priv(struct st_context *st, bool destroy_pipe)
    st_destroy_drawtex(st);
    st_destroy_perfmon(st);
    st_destroy_pbo_helpers(st);
+   st_destroy_bound_texture_handles(st);
+   st_destroy_bound_image_handles(st);
 
    for (shader = 0; shader < ARRAY_SIZE(st->state.sampler_views); shader++) {
       for (i = 0; i < ARRAY_SIZE(st->state.sampler_views[0]); i++) {
diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 520cd8d462..16f29669be 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -79,6 +79,12 @@ struct st_bitmap_cache
    ubyte *buffer;
 };
 
+struct st_bound_handle
+{
+   unsigned num_handles;
+   uint64_t *handles;
+};
+
 struct st_context
 {
    struct st_context_iface iface;
@@ -271,6 +277,11 @@ struct st_context
    struct st_perf_monitor_group *perfmon;
 
    enum pipe_reset_status reset_status;
+
+   /* Array of bound texture/image handles which are resident in the context.
+    */
+   struct st_bound_handle bound_texture_handles[PIPE_SHADER_TYPES];
+   struct st_bound_handle bound_image_handles[PIPE_SHADER_TYPES];
 };
 
 
diff --git a/src/mesa/state_tracker/st_texture.c b/src/mesa/state_tracker/st_texture.c
index 65f86f2b4f..cde7759a61 100644
--- a/src/mesa/state_tracker/st_texture.c
+++ b/src/mesa/state_tracker/st_texture.c
@@ -421,6 +421,83 @@ st_create_color_map_texture(struct gl_context *ctx)
    return pt;
 }
 
+/**
+ * Destroy bound texture handles for the given stage.
+ */
+static void
+st_destroy_bound_texture_handles_per_stage(struct st_context *st,
+                                           enum pipe_shader_type shader)
+{
+   struct st_bound_handle *bound_handles = &st->bound_texture_handles[shader];
+   struct pipe_context *pipe = st->pipe;
+   unsigned i;
+
+   if (likely(!bound_handles->num_handles))
+      return;
+
+   for (i = 0; i < bound_handles->num_handles; i++) {
+      uint64_t handle = bound_handles->handles[i];
+
+      pipe->make_texture_handle_resident(pipe, handle, false);
+      pipe->delete_texture_handle(pipe, handle);
+   }
+   free(bound_handles->handles);
+   bound_handles->num_handles = 0;
+}
+
+
+/**
+ * Destroy all bound texture handles in the context.
+ */
+void
+st_destroy_bound_texture_handles(struct st_context *st)
+{
+   unsigned i;
+
+   for (i = 0; i < PIPE_SHADER_TYPES; i++) {
+      st_destroy_bound_texture_handles_per_stage(st, i);
+   }
+}
+
+
+/**
+ * Destroy bound image handles for the given stage.
+ */
+static void
+st_destroy_bound_image_handles_per_stage(struct st_context *st,
+                                         enum pipe_shader_type shader)
+{
+   struct st_bound_handle *bound_handles = &st->bound_image_handles[shader];
+   struct pipe_context *pipe = st->pipe;
+   unsigned i;
+
+   if (likely(!bound_handles->num_handles))
+      return;
+
+   for (i = 0; i < bound_handles->num_handles; i++) {
+      uint64_t handle = bound_handles->handles[i];
+
+      pipe->make_image_handle_resident(pipe, handle, GL_READ_WRITE, false);
+      pipe->delete_image_handle(pipe, handle);
+   }
+   free(bound_handles->handles);
+   bound_handles->num_handles = 0;
+}
+
+
+/**
+ * Destroy all bound image handles in the context.
+ */
+void
+st_destroy_bound_image_handles(struct st_context *st)
+{
+   unsigned i;
+
+   for (i = 0; i < PIPE_SHADER_TYPES; i++) {
+      st_destroy_bound_image_handles_per_stage(st, i);
+   }
+}
+
 
 /**
  * Create a texture handle from a texture unit.
diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index 7f8a0cb841..b97814cb16 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -250,6 +250,11 @@ st_texture_image_copy(struct pipe_context *pipe,
 extern struct pipe_resource *
 st_create_color_map_texture(struct gl_context *ctx);
 
+void
+st_destroy_bound_texture_handles(struct st_context *st);
+
+void
+st_destroy_bound_image_handles(struct st_context *st);
 
 bool
 st_etc_fallback(struct st_context *st, struct gl_texture_image *texImage);
-- 
2.13.0