Mesa (master): mesa: Add utility function _mesa_is_enum_format_snorm()

[Anuj Phogat]

Module: Mesa
Branch: master
Commit: 845b5ec89fb5543a3d38a31e1e8bc5f84449ea6c
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=845b5ec89fb5543a3d38a31e1e8bc5f84449ea6c

Author: Anuj Phogat <anuj.phogat at gmail.com>
Date:   Fri Jun  6 14:47:52 2014 -0700

mesa: Add utility function _mesa_is_enum_format_snorm()

Cc: <mesa-stable at lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand at intel.com>

---

 src/mesa/main/glformats.c |   37 +++++++++++++++++++++++++++++++++++++
 src/mesa/main/glformats.h |    3 +++
 2 files changed, 40 insertions(+)

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index 304d452..a0c7170 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -353,6 +353,43 @@ _mesa_bytes_per_vertex_attrib(GLint comps, GLenum type)
    }
 }
 
+/**
+ * Test if the given format is a SNORM (signed-normalized) format.
+ */
+GLboolean
+_mesa_is_enum_format_snorm(GLenum format)
+{
+   switch (format) {
+   /* signed, normalized texture formats */
+   case GL_RED_SNORM:
+   case GL_R8_SNORM:
+   case GL_R16_SNORM:
+   case GL_RG_SNORM:
+   case GL_RG8_SNORM:
+   case GL_RG16_SNORM:
+   case GL_RGB_SNORM:
+   case GL_RGB8_SNORM:
+   case GL_RGB16_SNORM:
+   case GL_RGBA_SNORM:
+   case GL_RGBA8_SNORM:
+   case GL_RGBA16_SNORM:
+   case GL_ALPHA_SNORM:
+   case GL_ALPHA8_SNORM:
+   case GL_ALPHA16_SNORM:
+   case GL_LUMINANCE_SNORM:
+   case GL_LUMINANCE8_SNORM:
+   case GL_LUMINANCE16_SNORM:
+   case GL_LUMINANCE_ALPHA_SNORM:
+   case GL_LUMINANCE8_ALPHA8_SNORM:
+   case GL_LUMINANCE16_ALPHA16_SNORM:
+   case GL_INTENSITY_SNORM:
+   case GL_INTENSITY8_SNORM:
+   case GL_INTENSITY16_SNORM:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
 
 /**
  * Test if the given format is an integer (non-normalized) format.
diff --git a/src/mesa/main/glformats.h b/src/mesa/main/glformats.h
index d64114e..76e9a24 100644
--- a/src/mesa/main/glformats.h
+++ b/src/mesa/main/glformats.h
@@ -57,6 +57,9 @@ extern GLboolean
 _mesa_is_type_unsigned(GLenum type);
 
 extern GLboolean
+_mesa_is_enum_format_snorm(GLenum format);
+
+extern GLboolean
 _mesa_is_enum_format_integer(GLenum format);
 
 extern GLboolean