3 files changed, 92 insertions, 0 deletions

diff --git a/src/mesa/swrast/s_context.c b/src/mesa/swrast/s_context.c
index ee15813f3c..ea283a1943 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"
@@ -372,6 +373,83 @@ _swrast_validate_blend_func( GLcontext *ctx, GLuint n,
 }
 
 
+/**
+ * Make sure we have texture image data for all the textures we may need
+ * for subsequent rendering.
+ */
+static void
+_swrast_validate_texture_images(GLcontext *ctx)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLuint u;
+
+   if (!swrast->ValidateTextureImage || !ctx->Texture._EnabledUnits) {
+      /* no textures enabled, or no way to validate images! */
+      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) {
+                     swrast->ValidateTextureImage(ctx, texObj, face, lvl);
+                     ASSERT(texObj->Image[face][lvl]->Data);
+                  }
+               }
+            }
+         }
+      }
+   }
+}
+
+
+/**
+ * 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 )
 {
@@ -456,6 +534,9 @@ _swrast_validate_derived( GLcontext *ctx )
       if (swrast->NewState & _NEW_TEXTURE)
          _swrast_update_texture_samplers( ctx );
 
+      if (swrast->NewState & (_NEW_TEXTURE | _NEW_PROGRAM))
+         _swrast_validate_texture_images( ctx );
+
       swrast->NewState = 0;
       swrast->StateChanges = 0;
       swrast->InvalidateState = _swrast_invalidate_state;
diff --git a/src/mesa/swrast/s_context.h b/src/mesa/swrast/s_context.h
index c1c01df8f5..5d9a35043b 100644
--- a/src/mesa/swrast/s_context.h
+++ b/src/mesa/swrast/s_context.h
@@ -226,6 +226,11 @@ typedef void (*swrast_tri_func)( GLcontext *ctx, const SWvertex *,
                                  const SWvertex *, const SWvertex *);
 
 
+typedef void (*validate_texture_image_func)(GLcontext *ctx,
+                                            struct gl_texture_object *texObj,
+                                            GLuint face, GLuint level);
+
+
 /** \defgroup Bitmasks
  * Bitmasks to indicate which rasterization options are enabled
  * (RasterMask)
@@ -363,6 +368,8 @@ typedef struct
     */
    GLchan *TexelBuffer;
 
+   validate_texture_image_func ValidateTextureImage;
+
 } SWcontext;
 
 
diff --git a/src/mesa/swrast/swrast.h b/src/mesa/swrast/swrast.h
index dbc419b663..4422195a52 100644
--- a/src/mesa/swrast/swrast.h
+++ b/src/mesa/swrast/swrast.h
@@ -250,6 +250,10 @@ _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.