2 files changed, 35 insertions, 2 deletions
diff --git a/mesalib/src/mesa/state_tracker/st_atom_texture.c b/mesalib/src/mesa/state_tracker/st_atom_texture.c
index dba1d829c..4b43b2a7d 100644
--- a/mesalib/src/mesa/state_tracker/st_atom_texture.c
+++ b/mesalib/src/mesa/state_tracker/st_atom_texture.c
@@ -152,7 +152,27 @@ st_create_texture_sampler_view_from_stobj(struct pipe_context *pipe,
    u_sampler_view_default_template(&templ,
                                    stObj->pt,
                                    format);
-   templ.u.tex.first_level = stObj->base.BaseLevel;
+
+   if (stObj->pt->target == PIPE_BUFFER) {
+      unsigned base, size;
+      unsigned f, n;
+      const struct util_format_description *desc
+         = util_format_description(templ.format);
+
+      base = stObj->base.BufferOffset;
+      if (base >= stObj->pt->width0)
+         return NULL;
+      size = MIN2(stObj->pt->width0 - base, (unsigned)stObj->base.BufferSize);
+
+      f = ((base * 8) / desc->block.bits) * desc->block.width;
+      n = ((size * 8) / desc->block.bits) * desc->block.width;
+      if (!n)
+         return NULL;
+      templ.u.buf.first_element = f;
+      templ.u.buf.last_element  = f + (n - 1);
+   } else {
+      templ.u.tex.first_level = stObj->base.BaseLevel;
+   }
 
    if (swizzle != SWIZZLE_NOOP) {
       templ.swizzle_r = GET_SWZ(swizzle, 0);
diff --git a/mesalib/src/mesa/state_tracker/st_extensions.c b/mesalib/src/mesa/state_tracker/st_extensions.c
index af54cf7c8..214588f1f 100644
--- a/mesalib/src/mesa/state_tracker/st_extensions.c
+++ b/mesalib/src/mesa/state_tracker/st_extensions.c
@@ -534,7 +534,6 @@ void st_init_extensions(struct st_context *st)
    ctx->Extensions.EXT_blend_minmax = GL_TRUE;
    ctx->Extensions.EXT_framebuffer_blit = GL_TRUE;
    ctx->Extensions.EXT_framebuffer_object = GL_TRUE;
-   ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
    ctx->Extensions.EXT_fog_coord = GL_TRUE;
    ctx->Extensions.EXT_gpu_program_parameters = GL_TRUE;
    ctx->Extensions.EXT_pixel_buffer_object = GL_TRUE;
@@ -653,6 +652,13 @@ void st_init_extensions(struct st_context *st)
          break;
       }
    }
+   if (ctx->Const.MaxSamples == 1) {
+      /* one sample doesn't really make sense */
+      ctx->Const.MaxSamples = 0;
+   }
+   else if (ctx->Const.MaxSamples >= 2) {
+      ctx->Extensions.EXT_framebuffer_multisample = GL_TRUE;
+   }
 
    if (ctx->Const.MaxDualSourceDrawBuffers > 0)
       ctx->Extensions.ARB_blend_func_extended = GL_TRUE;
@@ -679,6 +685,13 @@ void st_init_extensions(struct st_context *st)
    }
    if (screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS)) {
       ctx->Extensions.ARB_texture_buffer_object = GL_TRUE;
+
+      ctx->Const.TextureBufferOffsetAlignment =
+         screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT);
+
+      if (ctx->Const.TextureBufferOffsetAlignment)
+         ctx->Extensions.ARB_texture_buffer_range = GL_TRUE;
+
       init_format_extensions(st, tbo_rgb32, Elements(tbo_rgb32),
                              PIPE_BUFFER, PIPE_BIND_SAMPLER_VIEW);
    }