[Mesa-stable] [PATCH 09/15] mesa: Add utility function mesa_is_enum_format_snorm()

[Anuj Phogat]

Cc: <mesa-stable at lists.freedesktop.org>
Signed-off-by: Anuj Phogat <anuj.phogat at gmail.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 9bb341c..05a3842 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -355,6 +355,43 @@ _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 5c3b2e3..d4856e5 100644
--- a/src/mesa/main/glformats.h
+++ b/src/mesa/main/glformats.h
@@ -60,6 +60,9 @@ 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
-- 
1.8.3.1