[Mesa-dev] [PATCH] swr: Update screen->context pointer with multiple contexts.

[Bruce Cherniak]

A pipe pointer in the screen allows for access to current device context
 in flush_frontbuffer and resource_destroy.  This wasn't tracking current
context in multi-context situations.
---
 src/gallium/drivers/swr/swr_context.cpp |    6 ++++--
 src/gallium/drivers/swr/swr_state.cpp   |    4 ++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/gallium/drivers/swr/swr_context.cpp b/src/gallium/drivers/swr/swr_context.cpp
index 3a5d9e0..df9e53e 100644
--- a/src/gallium/drivers/swr/swr_context.cpp
+++ b/src/gallium/drivers/swr/swr_context.cpp
@@ -323,7 +323,8 @@ swr_destroy(struct pipe_context *pipe)
    swr_destroy_scratch_buffers(ctx);
 
    assert(screen);
-   screen->pipe = NULL;
+   if (screen->pipe == pipe)
+      screen->pipe = NULL;
 
    FREE(ctx);
 }
@@ -366,7 +367,8 @@ swr_create_context(struct pipe_screen *p_screen, void *priv, unsigned flags)
    if (ctx->swrContext == NULL)
       goto fail;
 
-   screen->pipe = &ctx->pipe;
+   if (!screen->pipe)
+      screen->pipe = &ctx->pipe;
    ctx->pipe.screen = p_screen;
    ctx->pipe.destroy = swr_destroy;
    ctx->pipe.priv = priv;
diff --git a/src/gallium/drivers/swr/swr_state.cpp b/src/gallium/drivers/swr/swr_state.cpp
index 3eeb98d..8162fff 100644
--- a/src/gallium/drivers/swr/swr_state.cpp
+++ b/src/gallium/drivers/swr/swr_state.cpp
@@ -776,6 +776,10 @@ swr_update_derived(struct pipe_context *pipe,
    struct swr_context *ctx = swr_context(pipe);
    struct swr_screen *screen = swr_screen(ctx->pipe.screen);
 
+   /* Switch current screen->pipe context */
+   if (screen->pipe != screen->pipe)
+      screen->pipe = pipe;
+
    /* Any state that requires dirty flags to be re-triggered sets this mask */
    /* For example, user_buffer vertex and index buffers. */
    unsigned post_update_dirty_flags = 0;
-- 
1.7.1