From: Marek Olšák <marek.ol...@amd.com>
---
src/mesa/main/formats.c | 25 +++++++++++++++++++++++++
src/mesa/main/formats.h | 3 +++
2 files changed, 28 insertions(+)
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c
index 1f20a9a..b830dbc 100644
--- a/src/mesa/main/formats.c
+++ b/src/mesa/main/formats.c
@@ -2068,6 +2068,31 @@ _mesa_get_format_color_encoding(mesa_format format)
/**
+ * Return TRUE if format is an ETC2 compressed format specified
+ * by GL_ARB_ES3_compatibility.
+ */
+GLboolean
+_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 dc50bc8..166cd22 100644
--- a/src/mesa/main/formats.h
+++ b/src/mesa/main/formats.h
@@ -446,6 +446,9 @@ _mesa_is_format_signed(mesa_format format);
extern GLboolean
_mesa_is_format_integer(mesa_format format);
+extern GLboolean
+_mesa_is_format_etc2(mesa_format format);
+
extern GLenum
_mesa_get_format_color_encoding(mesa_format format);
--
1.9.1
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