[Mesa-dev] [PATCH 6/8] intel: Don't flush the old context in intelMakeCurrent

[Neil Roberts]

It shouldn't be necessary to flush the context within the driver
implementation because the old context is explicitly flushed in
_mesa_make_current before the driver code is reached. It is useful to only
have a single place that flushes the context when switching contexts to make
it easier to later implement the GL_KHR_context_flush_control extension.
---
 src/mesa/drivers/dri/i915/intel_context.c | 9 ---------
 src/mesa/drivers/dri/i965/brw_context.c   | 9 ---------
 2 files changed, 18 deletions(-)

diff --git a/src/mesa/drivers/dri/i915/intel_context.c b/src/mesa/drivers/dri/i915/intel_context.c
index 3104776..c70bd25 100644
--- a/src/mesa/drivers/dri/i915/intel_context.c
+++ b/src/mesa/drivers/dri/i915/intel_context.c
@@ -622,21 +622,12 @@ intelMakeCurrent(__DRIcontext * driContextPriv,
                  __DRIdrawable * driReadPriv)
 {
    struct intel_context *intel;
-   GET_CURRENT_CONTEXT(curCtx);
 
    if (driContextPriv)
       intel = (struct intel_context *) driContextPriv->driverPrivate;
    else
       intel = NULL;
 
-   /* According to the glXMakeCurrent() man page: "Pending commands to
-    * the previous context, if any, are flushed before it is released."
-    * But only flush if we're actually changing contexts.
-    */
-   if (intel_context(curCtx) && intel_context(curCtx) != intel) {
-      _mesa_flush(curCtx);
-   }
-
    if (driContextPriv) {
       struct gl_context *ctx = &intel->ctx;
       struct gl_framebuffer *fb, *readFb;
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index d78ae56..f9b2e9b 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -972,21 +972,12 @@ intelMakeCurrent(__DRIcontext * driContextPriv,
                  __DRIdrawable * driReadPriv)
 {
    struct brw_context *brw;
-   GET_CURRENT_CONTEXT(curCtx);
 
    if (driContextPriv)
       brw = (struct brw_context *) driContextPriv->driverPrivate;
    else
       brw = NULL;
 
-   /* According to the glXMakeCurrent() man page: "Pending commands to
-    * the previous context, if any, are flushed before it is released."
-    * But only flush if we're actually changing contexts.
-    */
-   if (brw_context(curCtx) && brw_context(curCtx) != brw) {
-      _mesa_flush(curCtx);
-   }
-
    if (driContextPriv) {
       struct gl_context *ctx = &brw->ctx;
       struct gl_framebuffer *fb, *readFb;
-- 
1.9.3