[Intel-gfx] [PATCH] glXReleaseTexImageEXT should release reference to storage for the pixmap

[Shuang He]

According to GLX_EXT_texture_from_pixmap spec, "The storage for the GLX pixmap will be freed when it is not current to any client and all color buffers that are bound to a texture object have been released."
---
 include/GL/internal/dri_interface.h          |    8 +++++
 src/glx/x11/glxcmds.c                        |   18 ++++++++++-
 src/mesa/drivers/dri/intel/intel_screen.c    |    2 +
 src/mesa/drivers/dri/intel/intel_tex.h       |    7 ++++
 src/mesa/drivers/dri/intel/intel_tex_image.c |   42 ++++++++++++++++++++++++++
 5 files changed, 76 insertions(+), 1 deletions(-)

diff --git a/include/GL/internal/dri_interface.h b/include/GL/internal/dri_interface.h
index 910c916..e4cb308 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -245,6 +245,10 @@ struct __DRItexBufferExtensionRec {
     void (*setTexBuffer)(__DRIcontext *pDRICtx,
 			 GLint target,
 			 __DRIdrawable *pDraw);
+    void (*unsetTexBuffer)(__DRIcontext *pDRICtx,
+			 GLint target,
+			 __DRIdrawable *pDraw);
+
 
     /**
      * Method to override base texture image with the contents of a
@@ -256,6 +260,10 @@ struct __DRItexBufferExtensionRec {
 			  GLint target,
 			  GLint format,
 			  __DRIdrawable *pDraw);
+    void (*unsetTexBuffer2)(__DRIcontext *pDRICtx,
+			  GLint target,
+			  __DRIdrawable *pDraw);
+
 };
 
 /**
diff --git a/src/glx/x11/glxcmds.c b/src/glx/x11/glxcmds.c
index ec3e69e..ad54ca5 100644
--- a/src/glx/x11/glxcmds.c
+++ b/src/glx/x11/glxcmds.c
@@ -2698,8 +2698,24 @@ static void __glXReleaseTexImageEXT(Display *dpy,
 	return;
 
 #ifdef GLX_DIRECT_RENDERING
-    if (gc->driContext)
+    if (gc->driContext) {
+	__GLXDRIdrawable *pdraw = GetGLXDRIDrawable(dpy, drawable, NULL);
+
+	if (pdraw != NULL) {
+	    if (pdraw->psc->texBuffer->base.version >= 2 &&
+		pdraw->psc->texBuffer->unsetTexBuffer2 != NULL) {
+		(*pdraw->psc->texBuffer->unsetTexBuffer2)(gc->__driContext,
+							pdraw->textureTarget,
+							pdraw->driDrawable);
+	    } else {
+		(*pdraw->psc->texBuffer->unsetTexBuffer)(gc->__driContext,
+						       pdraw->textureTarget,
+						       pdraw->driDrawable);
+	    }
+	}
 	return;
+    }
+
 #endif
 
     opcode = __glXSetupForCommand(dpy);
diff --git a/src/mesa/drivers/dri/intel/intel_screen.c b/src/mesa/drivers/dri/intel/intel_screen.c
index 9904e34..05492c6 100644
--- a/src/mesa/drivers/dri/intel/intel_screen.c
+++ b/src/mesa/drivers/dri/intel/intel_screen.c
@@ -211,7 +211,9 @@ static const __DRItexOffsetExtension intelTexOffsetExtension = {
 static const __DRItexBufferExtension intelTexBufferExtension = {
     { __DRI_TEX_BUFFER, __DRI_TEX_BUFFER_VERSION },
    intelSetTexBuffer,
+   intelUnsetTexBuffer,
    intelSetTexBuffer2,
+   intelUnsetTexBuffer2,
 };
 
 static const __DRIextension *intelScreenExtensions[] = {
diff --git a/src/mesa/drivers/dri/intel/intel_tex.h b/src/mesa/drivers/dri/intel/intel_tex.h
index f5372d8..f299b72 100644
--- a/src/mesa/drivers/dri/intel/intel_tex.h
+++ b/src/mesa/drivers/dri/intel/intel_tex.h
@@ -149,9 +149,16 @@ void intelSetTexOffset(__DRIcontext *pDRICtx, GLint texname,
 		       unsigned long long offset, GLint depth, GLuint pitch);
 void intelSetTexBuffer(__DRIcontext *pDRICtx,
 		       GLint target, __DRIdrawable *pDraw);
+
+void intelUnsetTexBuffer(__DRIcontext *pDRICtx,
+		       GLint target, __DRIdrawable *pDraw);
+
 void intelSetTexBuffer2(__DRIcontext *pDRICtx,
 			GLint target, GLint format, __DRIdrawable *pDraw);
 
+void intelUnsetTexBuffer2(__DRIcontext *pDRICtx,
+			GLint target, __DRIdrawable *pDraw);
+
 GLuint intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit);
 
 void intel_tex_map_level_images(struct intel_context *intel,
diff --git a/src/mesa/drivers/dri/intel/intel_tex_image.c b/src/mesa/drivers/dri/intel/intel_tex_image.c
index ddbb13e..b17e5ff 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_image.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_image.c
@@ -795,6 +795,42 @@ intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
 }
 
 void
+intelUnsetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
+		   __DRIdrawable *dPriv)
+{
+   struct intel_context *intel = pDRICtx->driverPrivate;
+   struct intel_texture_object *intelObj;
+   struct intel_texture_image *intelImage;
+   struct gl_texture_unit *texUnit;
+   struct gl_texture_object *texObj;
+   struct gl_texture_image *texImage;
+   int level = 0;
+
+   texUnit = &intel->ctx.Texture.Unit[intel->ctx.Texture.CurrentUnit];
+   texObj = _mesa_select_tex_object(&intel->ctx, texUnit, target);
+   intelObj = intel_texture_object(texObj);
+
+   if (!intelObj)
+      return;
+
+   _mesa_lock_texture(&intel->ctx, texObj);
+
+   texImage = _mesa_get_tex_image(&intel->ctx, texObj, target, level);
+   intelImage = intel_texture_image(texImage);
+
+   if (intelImage->mt) {
+      intel_miptree_release(intel, &intelImage->mt);
+      intelImage->mt = NULL;
+   }
+   if (intelObj->mt) {
+      intel_miptree_release(intel, &intelObj->mt);
+      intelObj->mt = NULL;
+   }
+
+   _mesa_unlock_texture(&intel->ctx, texObj);
+}
+
+void
 intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
 {
    /* The old interface didn't have the format argument, so copy our
@@ -802,3 +838,9 @@ intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
     */
    intelSetTexBuffer2(pDRICtx, target, GLX_TEXTURE_FORMAT_RGBA_EXT, dPriv);
 }
+
+void
+intelUnsetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
+{
+   intelUnsetTexBuffer2(pDRICtx, target, dPriv);
+}
-- 
1.6.0.3