[Mesa-dev] [PATCH 10/20] mesa: reduce the size of gl_image_unit

[Marek Olšák]

From: Marek Olšák <marek.olsak at amd.com>

gl_context::ImageUnits: 6144 -> 4608 bytes
gl_context: 74608 -> 73072 bytes
---
 src/mesa/main/mtypes.h | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index f16ff4e..6ddef05 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -4605,59 +4605,58 @@ struct gl_buffer_binding
 struct gl_image_unit
 {
    /**
     * Texture object bound to this unit.
     */
    struct gl_texture_object *TexObj;
 
    /**
     * Level of the texture object bound to this unit.
     */
-   GLuint Level;
+   GLubyte Level;
 
    /**
     * \c GL_TRUE if the whole level is bound as an array of layers, \c
     * GL_FALSE if only some specific layer of the texture is bound.
     * \sa Layer
     */
    GLboolean Layered;
 
    /**
     * Layer of the texture object bound to this unit as specified by the
     * application.
     */
-   GLuint Layer;
+   GLushort Layer;
 
    /**
-    * Layer of the texture object bound to this unit, or zero if the
-    * whole level is bound.
+    * Layer of the texture object bound to this unit, or zero if
+    * Layered == false.
     */
-   GLuint _Layer;
+   GLushort _Layer;
 
    /**
     * Access allowed to this texture image.  Either \c GL_READ_ONLY,
     * \c GL_WRITE_ONLY or \c GL_READ_WRITE.
     */
    GLenum16 Access;
 
    /**
     * GL internal format that determines the interpretation of the
     * image memory when shader image operations are performed through
     * this unit.
     */
    GLenum16 Format;
 
    /**
     * Mesa format corresponding to \c Format.
     */
-   mesa_format _ActualFormat;
-
+   mesa_format _ActualFormat:16;
 };
 
 /**
  * Shader subroutines storage
  */
 struct gl_subroutine_index_binding
 {
    GLuint NumIndex;
    GLuint *IndexPtr;
 };
-- 
2.7.4