intel: Add a couple of helper functions to reduce rb code duplication.

(cherry picked from commit e339b669a14f37698b842c0c51c1f5e4001ef12f)

1 files changed, 33 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_tex_format.c b/src/mesa/drivers/dri/intel/intel_tex_format.c
index f8316ae2f8d..c9763c9ae16 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_format.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_format.c
@@ -4,6 +4,39 @@
 #include "main/formats.h"
 
 /**
+ * Returns the renderbuffer DataType for a MESA_FORMAT.
+ */
+GLenum
+intel_mesa_format_to_rb_datatype(gl_format format)
+{
+   switch (format) {
+   case MESA_FORMAT_ARGB8888:
+   case MESA_FORMAT_XRGB8888:
+   case MESA_FORMAT_SARGB8:
+   case MESA_FORMAT_R8:
+   case MESA_FORMAT_RG88:
+   case MESA_FORMAT_A8:
+   case MESA_FORMAT_AL88:
+   case MESA_FORMAT_RGB565:
+   case MESA_FORMAT_ARGB1555:
+   case MESA_FORMAT_ARGB4444:
+      return GL_UNSIGNED_BYTE;
+   case MESA_FORMAT_R16:
+   case MESA_FORMAT_RG1616:
+   case MESA_FORMAT_Z16:
+      return GL_UNSIGNED_SHORT;
+   case MESA_FORMAT_X8_Z24:
+      return GL_UNSIGNED_INT;
+   case MESA_FORMAT_S8_Z24:
+      return GL_UNSIGNED_INT_24_8_EXT;
+   default:
+      _mesa_problem(NULL, "unexpected MESA_FORMAT for renderbuffer");
+      return GL_UNSIGNED_BYTE;
+   }
+}
+
+
+/**
  * Choose hardware texture format given the user's glTexImage parameters.
  *
  * It works out that this function is fine for all the supported