[Mesa-dev] [PATCH 1/2] mesa/texcompress: add function to determine compressed format type

[Nanley Chery]

From: Nanley Chery <nanley.g.chery at intel.com>

Determines if a compressed format is non-palettized and specific.

Signed-off-by: Nanley Chery <nanley.g.chery at intel.com>
---
 src/mesa/main/texcompress.c | 10 ++++++++++
 src/mesa/main/texcompress.h |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/src/mesa/main/texcompress.c b/src/mesa/main/texcompress.c
index 84973d3..c8598bd 100644
--- a/src/mesa/main/texcompress.c
+++ b/src/mesa/main/texcompress.c
@@ -547,6 +547,16 @@ _mesa_glenum_to_compressed_format(GLenum format)
    }
 }
 
+/**
+ * Return whether or not the format is a specific, non-palettized compressed
+ * format. This works because all MESA_FORMATs for compressed GL formats
+ * correspond to non-generic compressed formats.
+ */
+bool
+_mesa_is_specific_np_compressed_format(GLenum format)
+{
+   return _mesa_glenum_to_compressed_format(format) != MESA_FORMAT_NONE;
+}
 
 /**
  * Given a compressed MESA_FORMAT_x value, return the corresponding
diff --git a/src/mesa/main/texcompress.h b/src/mesa/main/texcompress.h
index b00924d..b088dd2 100644
--- a/src/mesa/main/texcompress.h
+++ b/src/mesa/main/texcompress.h
@@ -39,6 +39,9 @@ _mesa_get_compressed_formats(struct gl_context *ctx, GLint *formats);
 extern mesa_format
 _mesa_glenum_to_compressed_format(GLenum format);
 
+extern bool
+_mesa_is_specific_np_compressed_format(GLenum format);
+
 extern GLenum
 _mesa_compressed_format_to_glenum(struct gl_context *ctx, mesa_format mesaFormat);
 
-- 
2.5.0