mesa/sso: rename Shader to the pointer _Shader

Basically a sed but shaderapi.c and get.c.
get.c => GL_CURRENT_PROGAM always refer to the "old" UseProgram behavior
shaderapi.c => the old api stil update the Shader object directly

V2: formatting improvement

V3 (idr):
* Rebase fixes after a block of code was moved from ir_to_mesa.cpp to
  shaderapi.c.
* Trivial reformatting.

Reviewed-by: Ian Romanick <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 88cf202dfe4..cf133c7c9cf 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -873,6 +873,18 @@ find_custom_value(struct gl_context *ctx, const struct value_desc *d, union valu
       v->value_int = ctx->TransformFeedback.CurrentObject->Name;
       break;
    case GL_CURRENT_PROGRAM:
+      /* The Changelog of the ARB_separate_shader_objects spec says:
+       *
+       * 24 25 Jul 2011  pbrown  Remove the language erroneously deleting
+       *                         CURRENT_PROGRAM.  In the EXT extension, this
+       *                         token was aliased to ACTIVE_PROGRAM_EXT, and
+       *                         was used to indicate the last program set by
+       *                         either ActiveProgramEXT or UseProgram.  In
+       *                         the ARB extension, the SSO active programs
+       *                         are now program pipeline object state and
+       *                         CURRENT_PROGRAM should still be used to query
+       *                         the last program set by UseProgram (bug 7822).
+       */
       v->value_int =
 	 ctx->Shader.ActiveProgram ? ctx->Shader.ActiveProgram->Name : 0;
       break;