From fdb3acf016bd320ae15c89610b72ecdb806cff57 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Fri, 27 Jan 2006 03:42:56 +0000
Subject: [PATCH] added _swrast_eject_texture_images()

---
 src/mesa/swrast/s_context.c | 39 +++++++++++++++++++++++++++++++++++++
 src/mesa/swrast/swrast.h    |  4 ++++
 2 files changed, 43 insertions(+)

diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c
index a1fb2d27f22..9eb81832dd3 100644
--- a/src/mesa/swrast/s_context.c
+++ b/src/mesa/swrast/s_context.c
@@ -32,6 +32,7 @@
 #include "colormac.h"
 #include "mtypes.h"
 #include "program.h"
+#include "teximage.h"
 #include "swrast.h"
 #include "s_blend.h"
 #include "s_context.h"
@@ -406,6 +407,44 @@ _swrast_validate_texture_images(GLcontext *ctx)
 }
 
 
+/**
+ * Free the texture image data attached to all currently enabled
+ * textures.  Meant to be called by device drivers when transitioning
+ * from software to hardware rendering.
+ */
+void
+_swrast_eject_texture_images(GLcontext *ctx)
+{
+   GLuint u;
+
+   if (!ctx->Texture._EnabledUnits) {
+      /* no textures enabled */
+      return;
+   }
+
+   for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
+      if (ctx->Texture.Unit[u]._ReallyEnabled) {
+         struct gl_texture_object *texObj = ctx->Texture.Unit[u]._Current;
+         ASSERT(texObj);
+         if (texObj) {
+            GLuint numFaces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
+            GLuint face;
+            for (face = 0; face < numFaces; face++) {
+               GLuint lvl;
+               for (lvl = texObj->BaseLevel; lvl <= texObj->_MaxLevel; lvl++) {
+                  struct gl_texture_image *texImg = texObj->Image[face][lvl];
+                  if (texImg && texImg->Data) {
+                     _mesa_free_texmemory(texImg->Data);
+                     texImg->Data = NULL;
+                  }
+               }
+            }
+         }
+      }
+   }
+}
+
+
 
 static void
 _swrast_sleep( GLcontext *ctx, GLbitfield new_state )
diff --git a/src/mesa/swrast/swrast.h b/src/mesa/swrast/swrast.h
index 9e63db02482..0587df3127a 100644
--- a/src/mesa/swrast/swrast.h
+++ b/src/mesa/swrast/swrast.h
@@ -244,6 +244,10 @@ _swrast_copy_texsubimage3d(GLcontext *ctx,
                            GLint x, GLint y, GLsizei width, GLsizei height);
 
 
+extern void
+_swrast_eject_texture_images(GLcontext *ctx);
+
+
 /**
  * The driver interface for the software rasterizer.
  * XXX this may go away.