From e59fa4c46c8857f2e04447777dd197464c95b2cb Mon Sep 17 00:00:00 2001
From: Juan Zhao <juan.j.zhao@intel.com>
Date: Sun, 9 Jan 2011 12:03:02 -0500
Subject: [PATCH] dri2: release texture image.

Add release function for texture_from_pixmap extension.
Some platform need to release texture image for texture_from_pixmap
extension, add this interface for those platforms.
---
 include/GL/internal/dri_interface.h |  9 +++++++++
 src/egl/drivers/dri2/egl_dri2.c     | 29 +++++++++++++++++++++++++----
 src/glx/dri2_glx.c                  | 21 +++++++++++++++++++++
 3 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/include/GL/internal/dri_interface.h b/include/GL/internal/dri_interface.h
index 9ee039bd90b..39aa68bc8ca 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -251,6 +251,15 @@ struct __DRItexBufferExtensionRec {
 			  GLint target,
 			  GLint format,
 			  __DRIdrawable *pDraw);
+    /**
+     * Method to release texture buffer in case some special platform
+     * need this.
+     *
+     * For GLX_EXT_texture_from_pixmap with AIGLX.
+     */
+    void (*releaseTexBuffer)(__DRIcontext *pDRICtx,
+			GLint target,
+			__DRIdrawable *pDraw);
 };
 
 /**
diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 6f40ab951f9..7592984c99e 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -1983,10 +1983,31 @@ static EGLBoolean
 dri2_release_tex_image(_EGLDriver *drv,
 		       _EGLDisplay *disp, _EGLSurface *surf, EGLint buffer)
 {
-   (void) drv;
-   (void) disp;
-   (void) surf;
-   (void) buffer;
+#if __DRI_TEX_BUFFER_VERSION >= 3
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
+   struct dri2_egl_context *dri2_ctx;
+   _EGLContext *ctx;
+   GLint  target;
+
+   ctx = _eglGetCurrentContext();
+   dri2_ctx = dri2_egl_context(ctx);
+
+   if (!_eglReleaseTexImage(drv, disp, surf, buffer))
+      return EGL_FALSE;
+
+   switch (dri2_surf->base.TextureTarget) {
+   case EGL_TEXTURE_2D:
+      target = GL_TEXTURE_2D;
+      break;
+   default:
+      assert(0);
+   }
+   if (dri2_dpy->tex_buffer->releaseTexBuffer!=NULL)
+    (*dri2_dpy->tex_buffer->releaseTexBuffer)(dri2_ctx->dri_context,
+                                             target,
+                                             dri2_surf->dri_drawable);
+#endif
 
    return EGL_TRUE;
 }
diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index b0559b24d72..75b1a103f01 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -719,6 +719,27 @@ dri2_bind_tex_image(Display * dpy,
 static void
 dri2_release_tex_image(Display * dpy, GLXDrawable drawable, int buffer)
 {
+#if __DRI_TEX_BUFFER_VERSION >= 3
+   struct glx_context *gc = __glXGetCurrentContext();
+   struct dri2_context *pcp = (struct dri2_context *) gc;
+   __GLXDRIdrawable *base = GetGLXDRIDrawable(dpy, drawable);
+   struct glx_display *dpyPriv = __glXInitialize(dpy);
+   struct dri2_drawable *pdraw = (struct dri2_drawable *) base;
+   struct dri2_display *pdp =
+      (struct dri2_display *) dpyPriv->dri2Display;
+   struct dri2_screen *psc;
+
+   if (pdraw != NULL) {
+      psc = (struct dri2_screen *) base->psc;
+
+      if (psc->texBuffer->base.version >= 3 &&
+          psc->texBuffer->releaseTexBuffer != NULL) {
+         (*psc->texBuffer->releaseTexBuffer) (pcp->driContext,
+                                           pdraw->base.textureTarget,
+                                           pdraw->driDrawable);
+      }
+   }
+#endif
 }
 
 static const struct glx_context_vtable dri2_context_vtable = {
-- 
2.30.2