1 files changed, 14 insertions, 5 deletions
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index ba8be125718..cdb2500f7c2 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -266,13 +266,16 @@ struct gen_mipmap_state
    GLuint FBO;
 };
 
-
+#define MAX_META_OPS_DEPTH      2
 /**
  * All per-context meta state.
  */
 struct gl_meta_state
 {
-   struct save_state Save;    /**< state saved during meta-ops */
+   /** Stack of state saved during meta-ops */
+   struct save_state Save[MAX_META_OPS_DEPTH];
+   /** Save stack depth */
+   GLuint SaveStackDepth;
 
    struct temp_texture TempTex;
 
@@ -324,8 +327,13 @@ _mesa_meta_free(struct gl_context *ctx)
 static void
 _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
 {
-   struct save_state *save = &ctx->Meta->Save;
+   struct save_state *save;
+
+   /* hope MAX_META_OPS_DEPTH is large enough */
+   assert(ctx->Meta->SaveStackDepth < MAX_META_OPS_DEPTH);
 
+   save = &ctx->Meta->Save[ctx->Meta->SaveStackDepth++];
+   memset(save, 0, sizeof(*save));
    save->SavedState = state;
 
    if (state & META_ALPHA_TEST) {
@@ -575,7 +583,7 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
 static void
 _mesa_meta_end(struct gl_context *ctx)
 {
-   struct save_state *save = &ctx->Meta->Save;
+   struct save_state *save = &ctx->Meta->Save[--ctx->Meta->SaveStackDepth];
    const GLbitfield state = save->SavedState;
 
    if (state & META_ALPHA_TEST) {
@@ -1398,6 +1406,7 @@ _mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)
    struct vertex verts[4];
    /* save all state but scissor, pixel pack/unpack */
    GLbitfield metaSave = META_ALL - META_SCISSOR - META_PIXEL_STORE;
+   const GLuint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
 
    if (buffers & BUFFER_BITS_COLOR) {
       /* if clearing color buffers, don't save/restore colormask */
@@ -1453,7 +1462,7 @@ _mesa_meta_Clear(struct gl_context *ctx, GLbitfield buffers)
       _mesa_StencilOpSeparate(GL_FRONT_AND_BACK,
                               GL_REPLACE, GL_REPLACE, GL_REPLACE);
       _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS,
-                                ctx->Stencil.Clear & 0x7fffffff,
+                                ctx->Stencil.Clear & stencilMax,
                                 ctx->Stencil.WriteMask[0]);
    }
    else {