mesa: add helper _mesa_is_format_etc2

v2: renamed GLboolean -> bool

Reviewed-by: Glenn Kennard <glenn.kennard@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>

diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index f03425e4169b976c3791cd53c7d481343d65f95b..a4ddbd669633155788abec9cccb15756223c083b 100644 (file)
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -376,6 +376,31 @@ _mesa_get_format_color_encoding(mesa_format format)
 }
 
 
+/**
+ * Return TRUE if format is an ETC2 compressed format specified
+ * by GL_ARB_ES3_compatibility.
+ */
+bool
+_mesa_is_format_etc2(mesa_format format)
+{
+   switch (format) {
+   case MESA_FORMAT_ETC2_RGB8:
+   case MESA_FORMAT_ETC2_SRGB8:
+   case MESA_FORMAT_ETC2_RGBA8_EAC:
+   case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
+   case MESA_FORMAT_ETC2_R11_EAC:
+   case MESA_FORMAT_ETC2_RG11_EAC:
+   case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
+   case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
+   case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
+   case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
+      return GL_TRUE;
+   default:
+      return GL_FALSE;
+   }
+}
+
+
 /**
  * For an sRGB format, return the corresponding linear color space format.
  * For non-sRGB formats, return the format as-is.

diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h
index 457c8abf82238026ee696c36dee83f9074f1bec5..8166b964c7fe35f450df125ef3c060327dfe4d18 100644 (file)
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -476,6 +476,9 @@ _mesa_is_format_signed(mesa_format format);
 extern GLboolean
 _mesa_is_format_integer(mesa_format format);
 
+extern bool
+_mesa_is_format_etc2(mesa_format format);
+
 extern GLenum
 _mesa_get_format_color_encoding(mesa_format format);