mesa/teximage: Make _mesa_format_no_online_compression public

[mesa.git] / src / mesa / main / teximage.h

diff --git a/src/mesa/main/teximage.h b/src/mesa/main/teximage.h
index fe5b485fa6940d95b07b76d17a47d67bdedacf4f..41f145c4cc8ab115e1e0d64e32b8f634da9fb835 100644 (file)
--- a/src/mesa/main/teximage.h
+++ b/src/mesa/main/teximage.h
@@ -47,6 +47,59 @@ _mesa_is_cube_face(GLenum target)
            target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z);
 }
 
+
+/**
+ * Return number of faces for a texture target.  This will be 6 for
+ * cube maps and 1 otherwise.
+ * NOTE: this function is not used for cube map arrays which operate
+ * more like 2D arrays than cube maps.
+ */
+static inline GLuint
+_mesa_num_tex_faces(GLenum target)
+{
+   switch (target) {
+   case GL_TEXTURE_CUBE_MAP:
+   case GL_PROXY_TEXTURE_CUBE_MAP:
+      return 6;
+   default:
+      return 1;
+   }
+}
+
+
+/**
+ * If the target is GL_TEXTURE_CUBE_MAP, return one of the
+ * GL_TEXTURE_CUBE_MAP_POSITIVE/NEGATIVE_X/Y/Z targets corresponding to
+ * the face parameter.
+ * Else, return target as-is.
+ */
+static inline GLenum
+_mesa_cube_face_target(GLenum target, unsigned face)
+{
+   if (target == GL_TEXTURE_CUBE_MAP) {
+      assert(face < 6);
+      return GL_TEXTURE_CUBE_MAP_POSITIVE_X + face;
+   }
+   else {
+      return target;
+   }
+}
+
+
+/**
+ * For cube map faces, return a face index in [0,5].
+ * For other targets return 0;
+ */
+static inline GLuint
+_mesa_tex_target_to_face(GLenum target)
+{
+   if (_mesa_is_cube_face(target))
+      return (GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X;
+   else
+      return 0;
+}
+
+
 /** Are any of the dimensions of given texture equal to zero? */
 static inline GLboolean
 _mesa_is_zero_size_texture(const struct gl_texture_image *texImage)
@@ -131,9 +184,6 @@ extern GLboolean
 _mesa_target_can_be_compressed(const struct gl_context *ctx, GLenum target,
                                GLenum intFormat, GLenum *error);
 
-extern GLuint
-_mesa_tex_target_to_face(GLenum target);
-
 extern GLint
 _mesa_get_texture_dimensions(GLenum target);
 
@@ -164,6 +214,12 @@ _mesa_legal_texture_base_format_for_target(struct gl_context *ctx,
                                            unsigned dimensions,
                                            const char *caller);
 
+bool
+_mesa_format_no_online_compression(const struct gl_context *ctx, GLenum format);
+
+GLboolean
+_mesa_is_renderable_texture_format(struct gl_context *ctx, GLenum internalformat);
+
 extern void
 _mesa_texture_sub_image(struct gl_context *ctx, GLuint dims,
                         struct gl_texture_object *texObj,