mesa: Add a function to query whether a meta-op is in progress.

This is needed by i965 to ensure that transform feedback counters are
not incremented during meta-ops.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 1683c85e9b7a6a0aa328d5166428d80c64d9636b..c5c59ebeec9925dc202719a7ab9ac655feebbe77 100644 (file)
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -984,6 +984,16 @@ _mesa_meta_end(struct gl_context *ctx)
 }
 
 
+/**
+ * Determine whether Mesa is currently in a meta state.
+ */
+GLboolean
+_mesa_meta_in_progress(struct gl_context *ctx)
+{
+   return ctx->Meta->SaveStackDepth != 0;
+}
+
+
 /**
  * Convert Z from a normalized value in the range [0, 1] to an object-space
  * Z coordinate in [-1, +1] so that drawing at the new Z position with the

diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h
index 71981398492d383aed35ca194426ac5495fa6a9a..d13796ebed0fd8c826db41a8fd714d53cc61da7b 100644 (file)
--- a/src/mesa/drivers/common/meta.h
+++ b/src/mesa/drivers/common/meta.h
@@ -69,6 +69,9 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state);
 extern void
 _mesa_meta_end(struct gl_context *ctx);
 
+extern GLboolean
+_mesa_meta_in_progress(struct gl_context *ctx);
+
 extern void
 _mesa_meta_BlitFramebuffer(struct gl_context *ctx,
                            GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,