From bdc5394d22d7bc1215c9a38f735a419c9063ab05 Mon Sep 17 00:00:00 2001
From: Zou Nan hai <nanhai.zou@intel.com>
Date: Wed, 24 Jan 2007 15:47:15 +0800
Subject: [PATCH]  965 ARB_Occlusion_query fix

---
 src/mesa/drivers/dri/i965/intel_context.c | 27 ++++++++++++++---------
 src/mesa/drivers/dri/i965/intel_context.h |  2 +-
 src/mesa/drivers/dri/i965/intel_screen.c  |  6 ++---
 3 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/intel_context.c b/src/mesa/drivers/dri/i965/intel_context.c
index 459ed109ed5..388600dbbe5 100644
--- a/src/mesa/drivers/dri/i965/intel_context.c
+++ b/src/mesa/drivers/dri/i965/intel_context.c
@@ -184,9 +184,17 @@ const struct dri_extension card_extensions[] =
     { NULL,                                NULL }
 };
 
-static const struct dri_extension arb_oc_extension = 
+const struct dri_extension arb_oc_extension = 
     { "GL_ARB_occlusion_query",            GL_ARB_occlusion_query_functions};
 
+void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging)
+{	     
+	struct intel_context *intel = ctx?intel_context(ctx):NULL;
+	driInitExtensions(ctx, card_extensions, enable_imaging);
+	if (!ctx || intel->intelScreen->drmMinor >= 8)
+		driInitSingleExtension (ctx, &arb_oc_extension);
+}
+
 static const struct dri_debug_control debug_control[] =
 {
     { "fall",  DEBUG_FALLBACKS },
@@ -248,28 +256,29 @@ static void
 intelBeginQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 {
 	struct intel_context *intel = intel_context( ctx );
-	GLuint64EXT tmp = 0;	
 	drmI830MMIO io = {
 		.read_write = MMIO_WRITE,
 		.reg = MMIO_REGS_PS_DEPTH_COUNT,
-		.data = &tmp 
+		.data = &q->Result 
 	};
 	intel->stats_wm = GL_TRUE;
 	intelFinish(&intel->ctx);
-	drmCommandWrite(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
+	drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
 }
 
 static void
 intelEndQuery(GLcontext *ctx, GLenum target, struct gl_query_object *q)
 {
 	struct intel_context *intel = intel_context( ctx );
+	GLuint64EXT tmp;	
 	drmI830MMIO io = {
 		.read_write = MMIO_READ,
 		.reg = MMIO_REGS_PS_DEPTH_COUNT,
-		.data = &q->Result
+		.data = &tmp
 	};
 	intelFinish(&intel->ctx);
 	drmCommandRead(intel->driFd, DRM_I830_MMIO, &io, sizeof(io));
+	q->Result = tmp - q->Result;
 	q->Ready = GL_TRUE;
 	intel->stats_wm = GL_FALSE;
 }
@@ -409,12 +418,7 @@ GLboolean intelInitContext( struct intel_context *intel,
       _mesa_printf("IRQs not active.  Exiting\n");
       exit(1);
    }
- 
-   driInitExtensions( ctx, card_extensions, 
-		      GL_TRUE );
-
-   if (intel->intelScreen->drmMinor >= 8)
-      driInitSingleExtension (ctx, &arb_oc_extension);
+   intelInitExtensions(ctx, GL_TRUE); 
 
    INTEL_DEBUG  = driParseDebugString( getenv( "INTEL_DEBUG" ),
 				       debug_control );
@@ -693,3 +697,4 @@ void UNLOCK_HARDWARE( struct intel_context *intel )
    _glthread_UNLOCK_MUTEX(lockMutex); 
 }
 
+
diff --git a/src/mesa/drivers/dri/i965/intel_context.h b/src/mesa/drivers/dri/i965/intel_context.h
index fe7ee382a19..d51536c3fe8 100644
--- a/src/mesa/drivers/dri/i965/intel_context.h
+++ b/src/mesa/drivers/dri/i965/intel_context.h
@@ -500,6 +500,7 @@ void intelBitmap(GLcontext * ctx,
 		 const struct gl_pixelstore_attrib *unpack,
 		 const GLubyte * pixels);
 
+void intelInitExtensions(GLcontext *ctx, GLboolean enable_imaging);
 #define _NEW_WINDOW_POS 0x40000000
 
 
@@ -522,6 +523,5 @@ static inline struct intel_texture_image *intel_texture_image( struct gl_texture
    return (struct intel_texture_image *)img;
 }
 
-
 #endif
 
diff --git a/src/mesa/drivers/dri/i965/intel_screen.c b/src/mesa/drivers/dri/i965/intel_screen.c
index 8269deba664..08f0bb340f7 100644
--- a/src/mesa/drivers/dri/i965/intel_screen.c
+++ b/src/mesa/drivers/dri/i965/intel_screen.c
@@ -38,6 +38,7 @@
 
 #include "intel_screen.h"
 
+#include "intel_context.h"
 #include "intel_tex.h"
 #include "intel_span.h"
 #include "intel_ioctl.h"
@@ -61,8 +62,6 @@ const GLuint __driNConfigOptions = 4;
 static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 #endif /*USE_NEW_INTERFACE*/
 
-extern const struct dri_extension card_extensions[];
-
 /**
  * Map all the memory regions described by the screen.
  * \return GL_TRUE if success, GL_FALSE if error.
@@ -687,7 +686,6 @@ void * __driCreateNewScreen_20050727( __DRInativeDisplay *dpy, int scrn, __DRIsc
 					(dri_priv->cpp == 2) ? 16 : 24,
 					(dri_priv->cpp == 2) ? 0  : 8,
 					GL_TRUE );
-
       /* Calling driInitExtensions here, with a NULL context pointer, does not actually
        * enable the extensions.  It just makes sure that all the dispatch offsets for all
        * the extensions that *might* be enables are known.  This is needed because the
@@ -696,7 +694,7 @@ void * __driCreateNewScreen_20050727( __DRInativeDisplay *dpy, int scrn, __DRIsc
        *
        * Hello chicken.  Hello egg.  How are you two today?
        */
-      driInitExtensions( NULL, card_extensions, GL_FALSE );
+      intelInitExtensions(NULL, GL_FALSE);
    }
 
    return (void *) psp;
-- 
2.30.2