Signed-off-by: Anuj Phogat <anuj.pho...@gmail.com>
---
src/mesa/main/glformats.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
src/mesa/main/glformats.h | 3 +++
2 files changed, 47 insertions(+)
diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index ac69fab..cac243c 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -1278,6 +1278,50 @@ _mesa_is_compressed_format(const struct gl_context *ctx,
GLenum format)
}
}
+/**
+ * Convert various unpack formats to the corresponding base format.
+ */
+GLenum
+_mesa_unpack_format_to_base_format(GLenum format)
+{
+ switch(format) {
+ case GL_RED_INTEGER:
+ return GL_RED;
+ case GL_GREEN_INTEGER:
+ return GL_GREEN;
+ case GL_BLUE_INTEGER:
+ return GL_BLUE;
+ case GL_RG_INTEGER:
+ return GL_RG;
+ case GL_RGB_INTEGER:
+ return GL_RGB;
+ case GL_RGBA_INTEGER:
+ return GL_RGBA;
+ case GL_BGR_INTEGER:
+ return GL_BGR;
+ case GL_BGRA_INTEGER:
+ return GL_BGRA;
+ case GL_ALPHA_INTEGER:
+ return GL_ALPHA;
+ case GL_LUMINANCE_INTEGER_EXT:
+ return GL_LUMINANCE;
+ case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+ return GL_LUMINANCE_ALPHA;
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_RG:
+ case GL_RGB:
+ case GL_RGBA:
+ case GL_BGR:
+ case GL_BGRA:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ case GL_LUMINANCE_ALPHA:
+ default:
+ return format;
+ }
+}
/**
* Convert various base formats to the cooresponding integer format.
diff --git a/src/mesa/main/glformats.h b/src/mesa/main/glformats.h
index 8881cb7..419955a 100644
--- a/src/mesa/main/glformats.h
+++ b/src/mesa/main/glformats.h
@@ -101,6 +101,9 @@ _mesa_is_compressed_format(const struct gl_context *ctx,
GLenum format);
extern GLenum
_mesa_base_format_to_integer_format(GLenum format);
+extern GLenum
+_mesa_unpack_format_to_base_format(GLenum format);
+
extern GLboolean
_mesa_base_format_has_channel(GLenum base_format, GLenum pname);
--
1.9.3
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