[Mesa-dev] [PATCH 1/2] mesa: Add functions _mesa_[un]pack_is_default()

[Chad Versace]

These functions check if each of the pixel packing and unpacking state,
including the pack and unpack buffers, are the default.

Signed-off-by: Chad Versace <chad.versace at linux.intel.com>
---
 src/mesa/main/pack.c | 21 +++++++++++++++++++++
 src/mesa/main/pack.h |  6 ++++++
 2 files changed, 27 insertions(+)

diff --git a/src/mesa/main/pack.c b/src/mesa/main/pack.c
index a23bc99..6131cb0 100644
--- a/src/mesa/main/pack.c
+++ b/src/mesa/main/pack.c
@@ -41,6 +41,7 @@
 #  pragma optimize( "g", off )
 #endif
 
+#include <string.h>
 
 #include "glheader.h"
 #include "colormac.h"
@@ -88,7 +89,27 @@ flip_bytes( GLubyte *p, GLuint n )
    }
 }
 
+/**
+ * Check that all pixel packing state, including the pixel pack buffer,
+ * is the default.
+ */
+bool
+_mesa_pack_is_default(struct gl_context *ctx)
+{
+   return memcmp(&ctx->Pack, &ctx->DefaultPacking,
+                 sizeof(struct gl_pixelstore_attrib)) == 0;
+}
 
+/**
+ * Check that all pixel unpacking state, including the pixel unpack buffer,
+ * is the default.
+ */
+bool
+_mesa_unpack_is_default(struct gl_context *ctx)
+{
+   return memcmp(&ctx->Unpack, &ctx->DefaultPacking,
+                 sizeof(struct gl_pixelstore_attrib)) == 0;
+}
 
 /*
  * Unpack a 32x32 pixel polygon stipple from user memory using the
diff --git a/src/mesa/main/pack.h b/src/mesa/main/pack.h
index 2fbdf91..86a5361 100644
--- a/src/mesa/main/pack.h
+++ b/src/mesa/main/pack.h
@@ -26,9 +26,15 @@
 #ifndef PACK_H
 #define PACK_H
 
+#include <stdbool.h>
 
 #include "mtypes.h"
 
+bool
+_mesa_pack_is_default(struct gl_context *ctx);
+
+bool
+_mesa_unpack_is_default(struct gl_context *ctx);
 
 extern void
 _mesa_unpack_polygon_stipple(const GLubyte *pattern, GLuint dest[32],
-- 
1.7.11.7