xserver xkeyboard-config mesa git update 21 nov 2011

9 files changed, 218 insertions, 170 deletions

diff --git a/mesalib/src/mesa/main/fbobject.c b/mesalib/src/mesa/main/fbobject.c
index f8b148cee..5b329f5c3 100644
--- a/mesalib/src/mesa/main/fbobject.c
+++ b/mesalib/src/mesa/main/fbobject.c
@@ -78,14 +78,6 @@ static struct gl_renderbuffer DummyRenderbuffer;
 static struct gl_framebuffer IncompleteFramebuffer;
 
 
-static inline GLboolean
-is_cube_face(GLenum target)
-{
-   return (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
-           target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z);
-}
-
-
 /**
  * Is the given FBO a user-created FBO?
  */
@@ -2008,7 +2000,7 @@ framebuffer_texture(struct gl_context *ctx, const char *caller, GLenum target,
          }
          else {
             err = (texObj->Target == GL_TEXTURE_CUBE_MAP)
-                ? !is_cube_face(textarget)
+                ? !_mesa_is_cube_face(textarget)
                 : (texObj->Target != textarget);
          }
       }
diff --git a/mesalib/src/mesa/main/mtypes.h b/mesalib/src/mesa/main/mtypes.h
index 285ec0783..b3427dac1 100644
--- a/mesalib/src/mesa/main/mtypes.h
+++ b/mesalib/src/mesa/main/mtypes.h
@@ -2218,6 +2218,9 @@ struct gl_shader_program
    /** Post-link transform feedback info. */
    struct gl_transform_feedback_info LinkedTransformFeedback;
 
+   /** Post-link gl_FragDepth layout for ARB_conservative_depth. */
+   enum gl_frag_depth_layout FragDepthLayout;
+
    /** Geometry shader state - copied into gl_geometry_program at link time */
    struct {
       GLint VerticesOut;
diff --git a/mesalib/src/mesa/main/readpix.c b/mesalib/src/mesa/main/readpix.c
index 86b87534d..8048a7286 100644
--- a/mesalib/src/mesa/main/readpix.c
+++ b/mesalib/src/mesa/main/readpix.c
@@ -70,6 +70,11 @@ fast_read_depth_pixels( struct gl_context *ctx,
    ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
 			       &map, &stride);
 
+   if (!map) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return GL_TRUE;  /* don't bother trying the slow path */
+   }
+
    dstStride = _mesa_image_row_stride(packing, width, GL_DEPTH_COMPONENT, type);
    dst = (GLubyte *) _mesa_image_address2d(packing, pixels, width, height,
 					   GL_DEPTH_COMPONENT, type, 0, 0);
@@ -126,6 +131,10 @@ read_depth_pixels( struct gl_context *ctx,
 
    ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
 			       &map, &stride);
+   if (!map) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return;
+   }
 
    /* General case (slower) */
    for (j = 0; j < height; j++, y++) {
@@ -165,6 +174,10 @@ read_stencil_pixels( struct gl_context *ctx,
 
    ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
 			       &map, &stride);
+   if (!map) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return;
+   }
 
    /* process image row by row */
    for (j = 0; j < height; j++) {
@@ -211,6 +224,10 @@ fast_read_rgba_pixels_memcpy( struct gl_context *ctx,
 
    ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
 			       &map, &stride);
+   if (!map) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return GL_TRUE;  /* don't bother trying the slow path */
+   }
 
    texelBytes = _mesa_get_format_bytes(rb->Format);
    for (j = 0; j < height; j++) {
@@ -224,7 +241,7 @@ fast_read_rgba_pixels_memcpy( struct gl_context *ctx,
    return GL_TRUE;
 }
 
-static GLboolean
+static void
 slow_read_rgba_pixels( struct gl_context *ctx,
 		       GLint x, GLint y,
 		       GLsizei width, GLsizei height,
@@ -248,6 +265,10 @@ slow_read_rgba_pixels( struct gl_context *ctx,
 
    ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
 			       &map, &stride);
+   if (!map) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return;
+   }
 
    for (j = 0; j < height; j++) {
       if (_mesa_is_integer_format(format)) {
@@ -263,8 +284,6 @@ slow_read_rgba_pixels( struct gl_context *ctx,
    }
 
    ctx->Driver.UnmapRenderbuffer(ctx, rb);
-
-   return GL_TRUE;
 }
 
 /*
@@ -327,6 +346,10 @@ fast_read_depth_stencil_pixels(struct gl_context *ctx,
 
    ctx->Driver.MapRenderbuffer(ctx, rb, x, y, width, height, GL_MAP_READ_BIT,
 			       &map, &stride);
+   if (!map) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return GL_TRUE;  /* don't bother trying the slow path */
+   }
 
    for (i = 0; i < height; i++) {
       _mesa_unpack_uint_24_8_depth_stencil_row(rb->Format, width,
@@ -363,8 +386,18 @@ fast_read_depth_stencil_pixels_separate(struct gl_context *ctx,
 
    ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
 			       GL_MAP_READ_BIT, &depthMap, &depthStride);
+   if (!depthMap) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return GL_TRUE;  /* don't bother trying the slow path */
+   }
+
    ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
 			       GL_MAP_READ_BIT, &stencilMap, &stencilStride);
+   if (!stencilMap) {
+      ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return GL_TRUE;  /* don't bother trying the slow path */
+   }
 
    for (j = 0; j < height; j++) {
       GLubyte stencilVals[MAX_WIDTH];
@@ -407,10 +440,20 @@ slow_read_depth_stencil_pixels_separate(struct gl_context *ctx,
     */
    ctx->Driver.MapRenderbuffer(ctx, depthRb, x, y, width, height,
 			       GL_MAP_READ_BIT, &depthMap, &depthStride);
+   if (!depthMap) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+      return;
+   }
+
    if (stencilRb != depthRb) {
       ctx->Driver.MapRenderbuffer(ctx, stencilRb, x, y, width, height,
                                   GL_MAP_READ_BIT, &stencilMap,
                                   &stencilStride);
+      if (!stencilMap) {
+         ctx->Driver.UnmapRenderbuffer(ctx, depthRb);
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels");
+         return;
+      }
    }
    else {
       stencilMap = depthMap;
diff --git a/mesalib/src/mesa/main/texgetimage.c b/mesalib/src/mesa/main/texgetimage.c
index 31d49f2d8..06506594d 100644
--- a/mesalib/src/mesa/main/texgetimage.c
+++ b/mesalib/src/mesa/main/texgetimage.c
@@ -386,11 +386,10 @@ get_tex_memcpy(struct gl_context *ctx, GLenum format, GLenum type,
     * so we don't have to worry about those.
     * XXX more format combinations could be supported here.
     */
-   if ((target == GL_TEXTURE_1D ||
-        target == GL_TEXTURE_2D ||
-        target == GL_TEXTURE_RECTANGLE ||
-        (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
-         target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z))) {
+   if (target == GL_TEXTURE_1D ||
+       target == GL_TEXTURE_2D ||
+       target == GL_TEXTURE_RECTANGLE ||
+       _mesa_is_cube_face(target)) {
       if ((texImage->TexFormat == MESA_FORMAT_ARGB8888 ||
              texImage->TexFormat == MESA_FORMAT_SARGB8) &&
           format == GL_BGRA &&
diff --git a/mesalib/src/mesa/main/teximage.c b/mesalib/src/mesa/main/teximage.c
index a84d6873d..c8ea4329f 100644
--- a/mesalib/src/mesa/main/teximage.c
+++ b/mesalib/src/mesa/main/teximage.c
@@ -522,8 +522,7 @@ _mesa_base_tex_format( struct gl_context *ctx, GLint internalFormat )
 GLuint
 _mesa_tex_target_to_face(GLenum target)
 {
-   if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
-       target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB)
+   if (_mesa_is_cube_face(target))
       return (GLuint) target - (GLuint) GL_TEXTURE_CUBE_MAP_POSITIVE_X;
    else
       return 0;
@@ -3094,8 +3093,7 @@ compressed_texture_error_check(struct gl_context *ctx, GLint dimensions,
    }
 
    /* For cube map, width must equal height */
-   if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
-       target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB && width != height) {
+   if (_mesa_is_cube_face(target) && width != height) {
       *reason = "width != height";
       return GL_INVALID_VALUE;
    }
@@ -3183,8 +3181,7 @@ compressed_subtexture_error_check(struct gl_context *ctx, GLint dimensions,
             return GL_INVALID_ENUM; /*target*/
          maxLevels = ctx->Const.MaxCubeTextureLevels;
       }
-      else if (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
-               target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB) {
+      else if (_mesa_is_cube_face(target)) {
          if (!ctx->Extensions.ARB_texture_cube_map)
             return GL_INVALID_ENUM; /*target*/
          maxLevels = ctx->Const.MaxCubeTextureLevels;
diff --git a/mesalib/src/mesa/main/teximage.h b/mesalib/src/mesa/main/teximage.h
index fd315bea3..9cc7d5a54 100644
--- a/mesalib/src/mesa/main/teximage.h
+++ b/mesalib/src/mesa/main/teximage.h
@@ -36,6 +36,16 @@
 #include "formats.h"
 
 
+/** Is the given value one of the 6 cube faces? */
+static inline GLboolean
+_mesa_is_cube_face(GLenum target)
+{
+   return (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB &&
+           target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB);
+}
+
+
+
 /** \name Internal functions */
 /*@{*/
 
diff --git a/mesalib/src/mesa/program/ir_to_mesa.cpp b/mesalib/src/mesa/program/ir_to_mesa.cpp
index 5cee83778..5a68fc51d 100644
--- a/mesalib/src/mesa/program/ir_to_mesa.cpp
+++ b/mesalib/src/mesa/program/ir_to_mesa.cpp
@@ -685,29 +685,6 @@ ir_to_mesa_visitor::visit(ir_variable *ir)
 
       fp->OriginUpperLeft = ir->origin_upper_left;
       fp->PixelCenterInteger = ir->pixel_center_integer;
-
-   } else if (strcmp(ir->name, "gl_FragDepth") == 0) {
-      struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
-      switch (ir->depth_layout) {
-      case ir_depth_layout_none:
-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_NONE;
-	 break;
-      case ir_depth_layout_any:
-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_ANY;
-	 break;
-      case ir_depth_layout_greater:
-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_GREATER;
-	 break;
-      case ir_depth_layout_less:
-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_LESS;
-	 break;
-      case ir_depth_layout_unchanged:
-	 fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_UNCHANGED;
-	 break;
-      default:
-	 assert(0);
-	 break;
-      }
    }
 
    if (ir->mode == ir_var_uniform && strncmp(ir->name, "gl_", 3) == 0) {
@@ -3222,6 +3199,12 @@ get_mesa_program(struct gl_context *ctx,
    do_set_program_inouts(shader->ir, prog, shader->Type == GL_FRAGMENT_SHADER);
    count_resources(prog);
 
+   /* Set the gl_FragDepth layout. */
+   if (target == GL_FRAGMENT_PROGRAM_ARB) {
+      struct gl_fragment_program *fp = (struct gl_fragment_program *)prog;
+      fp->FragDepthLayout = shader_program->FragDepthLayout;
+   }
+
    _mesa_reference_program(ctx, &shader->Program, prog);
 
    if ((ctx->Shader.Flags & GLSL_NO_OPT) == 0) {
diff --git a/mesalib/src/mesa/state_tracker/st_draw.c b/mesalib/src/mesa/state_tracker/st_draw.c
index cb518e1af..05a71d35c 100644
--- a/mesalib/src/mesa/state_tracker/st_draw.c
+++ b/mesalib/src/mesa/state_tracker/st_draw.c
@@ -648,45 +648,108 @@ check_uniforms(struct gl_context *ctx)
    }
 }
 
-/** Helper code for primitive restart fallback */
-#define DO_DRAW(pipe, cur_start, cur_count) \
-   do { \
-      info.start = cur_start; \
-      info.count = cur_count; \
-      if (u_trim_pipe_prim(info.mode, &info.count)) { \
-         if (transfer) \
-            pipe_buffer_unmap(pipe, transfer); \
-         pipe->draw_vbo(pipe, &info); \
-         if (transfer) { \
-            ptr = pipe_buffer_map(pipe, ibuffer->buffer, PIPE_TRANSFER_READ, &transfer); \
-            assert(ptr != NULL); \
-            ptr = ADD_POINTERS(ptr, ibuffer->offset); \
-         } \
-      } \
-   } while(0)
-      
-/** More helper code for primitive restart fallback */
-#define PRIM_RESTART_LOOP(elements) \
-   do { \
-      for (i = start; i < end; i++) { \
-         if (elements[i] == info.restart_index) { \
-            if (cur_count > 0) { \
-               /* draw elts up to prev pos */ \
-               DO_DRAW(pipe, cur_start, cur_count); \
-            } \
-            /* begin new prim at next elt */ \
-            cur_start = i + 1; \
-            cur_count = 0; \
-         } \
-         else { \
-            cur_count++; \
+
+/*
+ * Notes on primitive restart:
+ * The code below is used when the gallium driver does not support primitive
+ * restart itself.  We map the index buffer, find the restart indexes, unmap
+ * the index buffer then draw the sub-primitives delineated by the restarts.
+ * A couple possible optimizations:
+ * 1. Save the list of sub-primitive (start, count) values in a list attached
+ *    to the index buffer for re-use in subsequent draws.  The list would be
+ *    invalidated when the contents of the buffer changed.
+ * 2. If drawing triangle strips or quad strips, create a new index buffer
+ *    that uses duplicated vertices to render the disjoint strips as one
+ *    long strip.  We'd have to be careful to avoid using too much memory
+ *    for this.
+ * Finally, some apps might perform better if they don't use primitive restart
+ * at all rather than this fallback path.  Set MESA_EXTENSION_OVERRIDE to
+ * "-GL_NV_primitive_restart" to test that.
+ */
+
+
+struct sub_primitive
+{
+   unsigned start, count;
+};
+
+
+/**
+ * Scan the elements array to find restart indexes.  Return a list
+ * of primitive (start,count) pairs to indicate how to draw the sub-
+ * primitives delineated by the restart index.
+ */
+static struct sub_primitive *
+find_sub_primitives(const void *elements, unsigned element_size,
+                    unsigned start, unsigned end, unsigned restart_index,
+                    unsigned *num_sub_prims)
+{
+   const unsigned max_prims = end - start;
+   struct sub_primitive *sub_prims;
+   unsigned i, cur_start, cur_count, num;
+
+   sub_prims = (struct sub_primitive *)
+      malloc(max_prims * sizeof(struct sub_primitive));
+
+   if (!sub_prims) {
+      *num_sub_prims = 0;
+      return NULL;
+   }
+
+   cur_start = start;
+   cur_count = 0;
+   num = 0;
+
+#define SCAN_ELEMENTS(TYPE) \
+   for (i = start; i < end; i++) { \
+      if (((const TYPE *) elements)[i] == restart_index) { \
+         if (cur_count > 0) { \
+            assert(num < max_prims); \
+            sub_prims[num].start = cur_start; \
+            sub_prims[num].count = cur_count; \
+            num++; \
          } \
+         cur_start = i + 1; \
+         cur_count = 0; \
       } \
-      if (cur_count > 0) { \
-         DO_DRAW(pipe, cur_start, cur_count); \
+      else { \
+         cur_count++; \
       } \
-   } while (0)
+   } \
+   if (cur_count > 0) { \
+      assert(num < max_prims); \
+      sub_prims[num].start = cur_start; \
+      sub_prims[num].count = cur_count; \
+      num++; \
+   }
+
+   switch (element_size) {
+   case 1:
+      SCAN_ELEMENTS(ubyte);
+      break;
+   case 2:
+      SCAN_ELEMENTS(ushort);
+      break;
+   case 4:
+      SCAN_ELEMENTS(uint);
+      break;
+   default:
+      assert(0 && "bad index_size in find_sub_primitives()");
+   }
+
+#undef SCAN_ELEMENTS
+
+   *num_sub_prims = num;
+
+   return sub_prims;
+}
+
 
+/**
+ * For gallium drivers that don't support the primitive restart
+ * feature, handle it here by breaking up the indexed primitive into
+ * sub-primitives.
+ */
 static void
 handle_fallback_primitive_restart(struct pipe_context *pipe,
                                   const struct _mesa_index_buffer *ib,
@@ -695,78 +758,61 @@ handle_fallback_primitive_restart(struct pipe_context *pipe,
 {
    const unsigned start = orig_info->start;
    const unsigned count = orig_info->count;
-   const unsigned end = start + count;
    struct pipe_draw_info info = *orig_info;
    struct pipe_transfer *transfer = NULL;
-   unsigned instance, i, cur_start, cur_count;
-   const void *ptr;
+   unsigned instance, i;
+   const void *ptr = NULL;
+   struct sub_primitive *sub_prims;
+   unsigned num_sub_prims;
 
-   info.primitive_restart = FALSE;
-
-   if (!info.indexed) {
-      /* Splitting the draw arrays call is handled by the VBO module */
-      if (u_trim_pipe_prim(info.mode, &info.count))
-         pipe->draw_vbo(pipe, &info);
+   assert(info.indexed);
+   assert(ibuffer->buffer);
+   assert(ib);
 
+   if (!ibuffer->buffer || !ib)
       return;
-   }
 
-   /* info.indexed == TRUE */
-   assert(ibuffer);
-   assert(ibuffer->buffer);
+   info.primitive_restart = FALSE;
+   info.instance_count = 1;
 
-   if (ib) {
-      struct gl_buffer_object *bufobj = ib->obj;
-      if (bufobj && bufobj->Name) {
-         ptr = NULL;
-      }
-      else {
-         ptr = ib->ptr;
-      }
-   } else {
-      ptr = NULL;
+   if (ib->obj && _mesa_is_bufferobj(ib->obj)) {
+      ptr = pipe_buffer_map_range(pipe, ibuffer->buffer,
+                                  start * ibuffer->index_size, /* start */
+                                  count * ibuffer->index_size, /* length */
+                                  PIPE_TRANSFER_READ, &transfer);
+   }
+   else {
+      ptr = ib->ptr;
    }
 
    if (!ptr)
-      ptr = pipe_buffer_map(pipe, ibuffer->buffer, PIPE_TRANSFER_READ, &transfer);
+      return;
 
-   if (!ptr)
-     return;
    ptr = ADD_POINTERS(ptr, ibuffer->offset);
 
-   /* Need to loop over instances as well to preserve draw order */
+   sub_prims = find_sub_primitives(ptr, ibuffer->index_size,
+                                   0, count, orig_info->restart_index,
+                                   &num_sub_prims);
+
+   if (transfer)
+      pipe_buffer_unmap(pipe, transfer);
+
+   /* Now draw the sub primitives.
+    * Need to loop over instances as well to preserve draw order.
+    */
    for (instance = 0; instance < orig_info->instance_count; instance++) {
       info.start_instance = instance + orig_info->start_instance;
-      info.instance_count = 1;
-      cur_start = start;
-      cur_count = 0;
-
-      switch (ibuffer->index_size) {
-      case 1:
-         {
-            const ubyte *elt_ub = (const ubyte *)ptr; 
-            PRIM_RESTART_LOOP(elt_ub);
-         }
-         break;
-      case 2:
-         {
-            const ushort *elt_us = (const ushort *)ptr;
-            PRIM_RESTART_LOOP(elt_us);
-         }
-         break;
-      case 4:
-         {
-            const uint *elt_ui = (const uint *)ptr;
-            PRIM_RESTART_LOOP(elt_ui);
+      for (i = 0; i < num_sub_prims; i++) {
+         info.start = sub_prims[i].start;
+         info.count = sub_prims[i].count;
+         if (u_trim_pipe_prim(info.mode, &info.count)) {
+            pipe->draw_vbo(pipe, &info);
          }
-         break;
-      default:
-         assert(0 && "bad index_size in handle_fallback_primitive_restart()");
       }
    }
 
-   if (transfer)
-      pipe_buffer_unmap(pipe, transfer);
+   if (sub_prims)
+      free(sub_prims);
 }
 
 
@@ -978,10 +1024,13 @@ st_draw_vbo(struct gl_context *ctx,
          info.min_index = min_index;
          info.max_index = max_index;
       }
-   }
 
-   info.primitive_restart = ctx->Array.PrimitiveRestart;
-   info.restart_index = ctx->Array.RestartIndex;
+      /* The VBO module handles restart for the non-indexed GLDrawArrays
+       * so we only set these fields for indexed drawing:
+       */
+      info.primitive_restart = ctx->Array.PrimitiveRestart;
+      info.restart_index = ctx->Array.RestartIndex;
+   }
 
    /* do actual drawing */
    for (i = 0; i < nr_prims; i++) {
@@ -996,19 +1045,14 @@ st_draw_vbo(struct gl_context *ctx,
       }
 
       if (info.primitive_restart) {
-         /*
-          * Handle primitive restart for drivers that doesn't support it.
-          *
-          * The VBO module handles restart inside of draw_arrays for us,
-          * but we should still remove the primitive_restart flag on the
-          * info struct, the fallback function does this for us. Just
-          * remove the flag for all drivers in this case as well.
-          */
-         if (st->sw_primitive_restart || !info.indexed)
+         if (st->sw_primitive_restart) {
+            /* Handle primitive restart for drivers that doesn't support it */
             handle_fallback_primitive_restart(pipe, ib, &ibuffer, &info);
-         else
+         }
+         else {
             /* don't trim, restarts might be inside index list */
             pipe->draw_vbo(pipe, &info);
+         }
       }
       else if (u_trim_pipe_prim(info.mode, &info.count))
          pipe->draw_vbo(pipe, &info);
diff --git a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 0bf6766f7..929c7af01 100644
--- a/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/mesalib/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -1017,29 +1017,6 @@ glsl_to_tgsi_visitor::visit(ir_variable *ir)
 
       fp->OriginUpperLeft = ir->origin_upper_left;
       fp->PixelCenterInteger = ir->pixel_center_integer;
-
-   } else if (strcmp(ir->name, "gl_FragDepth") == 0) {
-      struct gl_fragment_program *fp = (struct gl_fragment_program *)this->prog;
-      switch (ir->depth_layout) {
-      case ir_depth_layout_none:
-         fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_NONE;
-         break;
-      case ir_depth_layout_any:
-         fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_ANY;
-         break;
-      case ir_depth_layout_greater:
-         fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_GREATER;
-         break;
-      case ir_depth_layout_less:
-         fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_LESS;
-         break;
-      case ir_depth_layout_unchanged:
-         fp->FragDepthLayout = FRAG_DEPTH_LAYOUT_UNCHANGED;
-         break;
-      default:
-         assert(0);
-         break;
-      }
    }
 
    if (ir->mode == ir_var_uniform && strncmp(ir->name, "gl_", 3) == 0) {