From 5192262833c08903b0e27b991f4b9995c187a8ce Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Thu, 4 Apr 2013 14:06:51 -0600
Subject: [PATCH] st/xlib: add HUD support for xlib/GLX

For the softpipe and llvmpipe drivers.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
---
 src/gallium/state_trackers/glx/xlib/xm_api.c | 15 +++++++++++++++
 src/gallium/state_trackers/glx/xlib/xm_api.h |  3 +++
 src/gallium/state_trackers/glx/xlib/xm_st.c  | 12 ++++++++++++
 src/gallium/state_trackers/glx/xlib/xm_st.h  |  4 ++++
 4 files changed, 34 insertions(+)

diff --git a/src/gallium/state_trackers/glx/xlib/xm_api.c b/src/gallium/state_trackers/glx/xlib/xm_api.c
index 021175c70c4..04960f30ef5 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_api.c
+++ b/src/gallium/state_trackers/glx/xlib/xm_api.c
@@ -64,6 +64,8 @@
 #include "util/u_atomic.h"
 #include "util/u_inlines.h"
 
+#include "hud/hud_context.h"
+
 #include "xm_public.h"
 #include <GL/glx.h>
 
@@ -910,6 +912,8 @@ XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list,
 
    c->st->st_manager_private = (void *) c;
 
+   c->hud = hud_create(c->st->pipe, c->st->cso_context);
+
    return c;
 
 fail:
@@ -925,6 +929,10 @@ fail:
 PUBLIC
 void XMesaDestroyContext( XMesaContext c )
 {
+   if (c->hud) {
+      hud_destroy(c->hud);
+   }
+
    c->st->destroy(c->st);
 
    /* FIXME: We should destroy the screen here, but if we do so, surfaces may 
@@ -1224,6 +1232,13 @@ void XMesaSwapBuffers( XMesaBuffer b )
 {
    XMesaContext xmctx = XMesaGetCurrentContext();
 
+   /* Need to draw HUD before flushing */
+   if (xmctx && xmctx->hud) {
+      struct pipe_resource *back =
+         xmesa_get_framebuffer_resource(b->stfb, ST_ATTACHMENT_BACK_LEFT);
+      hud_draw(xmctx->hud, back);
+   }
+
    if (xmctx && xmctx->xm_buffer == b) {
       xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL);
    }
diff --git a/src/gallium/state_trackers/glx/xlib/xm_api.h b/src/gallium/state_trackers/glx/xlib/xm_api.h
index 606bcf3dc81..6d37ed7cab9 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_api.h
+++ b/src/gallium/state_trackers/glx/xlib/xm_api.h
@@ -67,6 +67,8 @@ and create a window, you must do the following to use the X/Mesa interface:
 # include <X11/Xlibint.h>
 # include <X11/Xutil.h>
 
+struct hud_context;
+
 typedef struct xmesa_display *XMesaDisplay;
 typedef struct xmesa_buffer *XMesaBuffer;
 typedef struct xmesa_context *XMesaContext;
@@ -305,6 +307,7 @@ struct xmesa_context {
    XMesaVisual xm_visual;	/** pixel format info */
    XMesaBuffer xm_buffer;	/** current drawbuffer */
    XMesaBuffer xm_read_buffer;  /** current readbuffer */
+   struct hud_context *hud;
 };
 
 
diff --git a/src/gallium/state_trackers/glx/xlib/xm_st.c b/src/gallium/state_trackers/glx/xlib/xm_st.c
index a681e82fe01..1cfd89ee85f 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_st.c
+++ b/src/gallium/state_trackers/glx/xlib/xm_st.c
@@ -317,6 +317,18 @@ xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
    free(stfbi);
 }
 
+/**
+ * Return the pipe_surface which corresponds to the given
+ * framebuffer attachment.
+ */
+struct pipe_resource *
+xmesa_get_framebuffer_resource(struct st_framebuffer_iface *stfbi,
+                               enum st_attachment_type att)
+{
+   struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
+   return xstfb->textures[att];
+}
+
 void
 xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
 {
diff --git a/src/gallium/state_trackers/glx/xlib/xm_st.h b/src/gallium/state_trackers/glx/xlib/xm_st.h
index a2937281237..c939c1ee73c 100644
--- a/src/gallium/state_trackers/glx/xlib/xm_st.h
+++ b/src/gallium/state_trackers/glx/xlib/xm_st.h
@@ -40,6 +40,10 @@ xmesa_create_st_framebuffer(XMesaDisplay xmdpy, XMesaBuffer b);
 void
 xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi);
 
+struct pipe_resource *
+xmesa_get_framebuffer_resource(struct st_framebuffer_iface *stfbi,
+                               enum st_attachment_type att);
+
 void
 xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi);
 
-- 
2.30.2