3 files changed, 27 insertions, 1 deletions
diff --git a/src/gallium/state_trackers/dri/dri_drawable.c b/src/gallium/state_trackers/dri/dri_drawable.c
index 5846390d02..09cd3091d2 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.c
+++ b/src/gallium/state_trackers/dri/dri_drawable.c
@@ -138,6 +138,18 @@ dri_get_buffers(__DRIdrawablePrivate * dPriv)
    dri_drawable->pBackClipRects[0].x2 = dri_drawable->w;
    dri_drawable->pBackClipRects[0].y2 = dri_drawable->h;
 
+   if (drawable->old_num == count &&
+       drawable->old_w == dri_drawable->w &&
+       drawable->old_h == dri_drawable->h &&
+       memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * count) == 0) {
+       return;
+   } else {
+      drawable->old_num = count;
+      drawable->old_w = dri_drawable->w;
+      drawable->old_h = dri_drawable->h;
+      memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * count);
+   }
+
    for (i = 0; i < count; i++) {
       enum pipe_format format = 0;
       int index = 0;
diff --git a/src/gallium/state_trackers/dri/dri_drawable.h b/src/gallium/state_trackers/dri/dri_drawable.h
index 78a66624aa..0f654d804a 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.h
+++ b/src/gallium/state_trackers/dri/dri_drawable.h
@@ -46,6 +46,11 @@ struct dri_drawable
    unsigned attachments[8];
    unsigned num_attachments;
 
+   __DRIbuffer old[8];
+   unsigned old_num;
+   unsigned old_w;
+   unsigned old_h;
+
    /* gallium */
    struct st_framebuffer *stfb;
    struct pipe_fence_handle *swap_fences[DRI_SWAP_FENCES_MAX];
diff --git a/src/gallium/state_trackers/dri/dri_extensions.c b/src/gallium/state_trackers/dri/dri_extensions.c
index 0c59d42d5c..2f48162526 100644
--- a/src/gallium/state_trackers/dri/dri_extensions.c
+++ b/src/gallium/state_trackers/dri/dri_extensions.c
@@ -36,9 +36,11 @@
 #define need_GL_ARB_multisample
 #define need_GL_ARB_occlusion_query
 #define need_GL_ARB_point_parameters
+#define need_GL_ARB_shader_objects
 #define need_GL_ARB_texture_compression
 #define need_GL_ARB_vertex_buffer_object
 #define need_GL_ARB_vertex_program
+#define need_GL_ARB_vertex_shader
 #define need_GL_ARB_window_pos
 #define need_GL_EXT_blend_color
 #define need_GL_EXT_blend_equation_separate
@@ -50,16 +52,23 @@
 #define need_GL_EXT_multi_draw_arrays
 #define need_GL_EXT_secondary_color
 #define need_GL_NV_vertex_program
+#define need_GL_VERSION_2_0
+#define need_GL_VERSION_2_1
 #include "extension_helper.h"
 
 /**
  * Extension strings exported by the driver.
  */
 const struct dri_extension card_extensions[] = {
+   {"GL_ARB_fragment_shader", NULL},
    {"GL_ARB_multisample", GL_ARB_multisample_functions},
    {"GL_ARB_multitexture", NULL},
    {"GL_ARB_occlusion_query", GL_ARB_occlusion_query_functions},
+   {"GL_ARB_pixel_buffer_object", NULL},
    {"GL_ARB_point_parameters", GL_ARB_point_parameters_functions},
+   {"GL_ARB_shading_language_100", GL_VERSION_2_0_functions },
+   {"GL_ARB_shading_language_120", GL_VERSION_2_1_functions },
+   {"GL_ARB_shader_objects", GL_ARB_shader_objects_functions},
    {"GL_ARB_texture_border_clamp", NULL},
    {"GL_ARB_texture_compression", GL_ARB_texture_compression_functions},
    {"GL_ARB_texture_cube_map", NULL},
@@ -69,7 +78,7 @@ const struct dri_extension card_extensions[] = {
    {"GL_ARB_texture_mirrored_repeat", NULL},
    {"GL_ARB_texture_rectangle", NULL},
    {"GL_ARB_vertex_buffer_object", GL_ARB_vertex_buffer_object_functions},
-   {"GL_ARB_pixel_buffer_object", NULL},
+   {"GL_ARB_vertex_shader", GL_ARB_vertex_shader_functions},
    {"GL_ARB_vertex_program", GL_ARB_vertex_program_functions},
    {"GL_ARB_window_pos", GL_ARB_window_pos_functions},
    {"GL_EXT_blend_color", GL_EXT_blend_color_functions},