Mesa (gallium-0.1): pipebuffer: is_texture/buffer_referenced helper.

[Jose Fonseca]

Module: Mesa
Branch: gallium-0.1
Commit: a1276bfdd8ea2c2840f3ea8edd3cea8720804498
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a1276bfdd8ea2c2840f3ea8edd3cea8720804498

Author: José Fonseca <jfonseca at vmware.com>
Date:   Tue Oct 13 13:47:51 2009 +0100

pipebuffer: is_texture/buffer_referenced helper.

A hash table would be more efficient, but this likely isn't used often
enough to make a difference.

---

 src/gallium/auxiliary/pipebuffer/pb_validate.c |   14 ++++++++++++++
 src/gallium/auxiliary/pipebuffer/pb_validate.h |    8 ++++++++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/src/gallium/auxiliary/pipebuffer/pb_validate.c b/src/gallium/auxiliary/pipebuffer/pb_validate.c
index 1e54fc3..1c7b919 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_validate.c
+++ b/src/gallium/auxiliary/pipebuffer/pb_validate.c
@@ -99,6 +99,20 @@ pb_validate_add_buffer(struct pb_validate *vl,
 }
 
 
+unsigned
+pb_validate_is_buffer_referenced(struct pb_validate *vl,
+                                 struct pb_buffer *buf)
+{
+   unsigned i;
+   
+   for(i = 0; i < vl->used; ++i)
+      if(vl->buffers[i] == buf)
+         return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
+   
+   return 0;
+}
+
+
 enum pipe_error
 pb_validate_validate(struct pb_validate *vl) 
 {
diff --git a/src/gallium/auxiliary/pipebuffer/pb_validate.h b/src/gallium/auxiliary/pipebuffer/pb_validate.h
index 3db1d53..1da7b1a 100644
--- a/src/gallium/auxiliary/pipebuffer/pb_validate.h
+++ b/src/gallium/auxiliary/pipebuffer/pb_validate.h
@@ -61,6 +61,14 @@ pb_validate_add_buffer(struct pb_validate *vl,
                        struct pb_buffer *buf);
 
 /**
+ * Helper for pipe_context::is_texture_referenced and 
+ * pipe_context::is_buffer_referenced
+ */
+unsigned
+pb_validate_is_buffer_referenced(struct pb_validate *vl,
+                                 struct pb_buffer *buf);
+
+/**
  * Validate all buffers for hardware access.
  * 
  * Should be called right before issuing commands to the hardware.