mesa: move _mesa_update_fetch_functions() calls into swrast

Do it during swrast state validation since the FetchTexel() functions
are only called from swrast now and not core Mesa.
Remove assertions in mipmap.c since they're no longer appropriate.

src/mesa/main/mipmap.c

@@ -1955,8 +1955,6 @@ generate_mipmap_uncompressed(struct gl_context *ctx, GLenum target,
                                  dstDepth, border, srcImage->InternalFormat,
                                  srcImage->TexFormat);
       dstImage->DriverData = NULL;
-      dstImage->FetchTexelc = srcImage->FetchTexelc;
-      dstImage->FetchTexelf = srcImage->FetchTexelf;
 
       /* Alloc new teximage data buffer */
       {
@@ -1970,8 +1968,6 @@ generate_mipmap_uncompressed(struct gl_context *ctx, GLenum target,
       }
 
       ASSERT(dstImage->TexFormat);
-      ASSERT(dstImage->FetchTexelc);
-      ASSERT(dstImage->FetchTexelf);
 
       _mesa_generate_mipmap_level(target, datatype, comps, border,
                                   srcWidth, srcHeight, srcDepth,

src/mesa/main/teximage.c

@@ -42,7 +42,6 @@
 #include "mfeatures.h"
 #include "state.h"
 #include "texcompress.h"
-#include "texfetch.h"
 #include "teximage.h"
 #include "texstate.h"
 #include "texpal.h"
@@ -1104,7 +1103,7 @@ _mesa_init_teximage_fields(struct gl_context *ctx, GLenum target,
                            GLint border, GLenum internalFormat,
                            gl_format format)
 {
-   GLint i, dims;
+   GLint i;
 
    ASSERT(img);
    ASSERT(width >= 0);
@@ -1176,10 +1175,6 @@ _mesa_init_teximage_fields(struct gl_context *ctx, GLenum target,
    }
 
    img->TexFormat = format;
-
-   dims = _mesa_get_texture_dimensions(target);
-
-   _mesa_set_fetch_functions(img, dims);
 }
 
 

src/mesa/main/texparam.c

@@ -432,7 +432,6 @@ set_tex_parameteri(struct gl_context *ctx,
 	    if (texObj->Sampler.sRGBDecode != decode) {
 	       flush(ctx);
 	       texObj->Sampler.sRGBDecode = decode;
-	       _mesa_update_fetch_functions(texObj);
 	    }
 	    return GL_TRUE;
 	 }

src/mesa/state_tracker/st_cb_texture.c

@@ -38,7 +38,6 @@
 #include "main/pbo.h"
 #include "main/pixeltransfer.h"
 #include "main/texcompress.h"
-#include "main/texfetch.h"
 #include "main/texgetimage.h"
 #include "main/teximage.h"
 #include "main/texobj.h"
@@ -552,8 +551,6 @@ st_TexImage(struct gl_context * ctx,
    stImage->base.Face = _mesa_tex_target_to_face(target);
    stImage->base.Level = level;
 
-   _mesa_set_fetch_functions(texImage, dims);
-
    /* Release the reference to a potentially orphaned buffer.   
     * Release any old malloced memory.
     */
@@ -975,8 +972,6 @@ st_get_tex_image(struct gl_context * ctx, GLenum target, GLint level,
 
    dest = (GLubyte *) pixels;
 
-   _mesa_set_fetch_functions(texImage, get_texture_dims(target));
-
    for (i = 0; i < depth; i++) {
       if (compressed_dst) {
 	 _mesa_get_compressed_teximage(ctx, target, level, dest,

src/mesa/swrast/s_context.c

@@ -31,6 +31,7 @@
 #include "main/colormac.h"
 #include "main/mtypes.h"
 #include "main/teximage.h"
+#include "main/texfetch.h"
 #include "program/prog_parameter.h"
 #include "program/prog_statevars.h"
 #include "swrast.h"
@@ -469,11 +470,14 @@ _swrast_update_texture_samplers(struct gl_context *ctx)
       return; /* pipe hack */
 
    for (u = 0; u < ctx->Const.MaxTextureImageUnits; u++) {
-      const struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
+      struct gl_texture_object *tObj = ctx->Texture.Unit[u]._Current;
       /* Note: If tObj is NULL, the sample function will be a simple
        * function that just returns opaque black (0,0,0,1).
        */
-      swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
+      if (tObj) {
+         _mesa_update_fetch_functions(tObj);
+         swrast->TextureSample[u] = _swrast_choose_texture_sample_func(ctx, tObj);
+      }
    }
 }