Merge remote branch 'origin/master' into gallium_draw_llvm

13 files changed, 827 insertions, 72 deletions

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 11bf48622f..235cafcf1e 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -83,6 +83,13 @@ get_buffer_target(GLcontext *ctx, GLenum target)
          return &ctx->CopyWriteBuffer;
       }
       break;
+#if FEATURE_EXT_transform_feedback
+   case GL_TRANSFORM_FEEDBACK_BUFFER:
+      if (ctx->Extensions.EXT_transform_feedback) {
+         return &ctx->TransformFeedback.CurrentBuffer;
+      }
+      break;
+#endif
    default:
       return NULL;
    }
diff --git a/src/mesa/main/config.h b/src/mesa/main/config.h
index 2eac1cc2ed..30b48e4bd0 100644
--- a/src/mesa/main/config.h
+++ b/src/mesa/main/config.h
@@ -262,6 +262,11 @@
 /** For GL_ATI_envmap_bump - support bump mapping on first 8 units */
 #define SUPPORTED_ATI_BUMP_UNITS 0xff
 
+/** For GL_EXT_transform_feedback */
+#define MAX_FEEDBACK_ATTRIBS 32
+
+
+
 /**
  * \name Mesa-specific parameters
  */
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 521b18e43e..2074b32b25 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -123,6 +123,7 @@
 #include "stencil.h"
 #include "texcompress_s3tc.h"
 #include "texstate.h"
+#include "transformfeedback.h"
 #include "mtypes.h"
 #include "varray.h"
 #include "version.h"
@@ -560,6 +561,11 @@ _mesa_init_constants(GLcontext *ctx)
 
    /* GL_EXT_provoking_vertex */
    ctx->Const.QuadsFollowProvokingVertexConvention = GL_TRUE;
+
+   /* GL_EXT_transform_feedback */
+   ctx->Const.MaxTransformFeedbackSeparateAttribs = MAX_FEEDBACK_ATTRIBS;
+   ctx->Const.MaxTransformFeedbackSeparateComponents = 4 * MAX_FEEDBACK_ATTRIBS;
+   ctx->Const.MaxTransformFeedbackInterleavedComponents = 4 * MAX_FEEDBACK_ATTRIBS;
 }
 
 
@@ -684,6 +690,7 @@ init_attrib_groups(GLcontext *ctx)
    _mesa_init_shader_state( ctx );
    _mesa_init_stencil( ctx );
    _mesa_init_transform( ctx );
+   _mesa_init_transform_feedback( ctx );
    _mesa_init_varray( ctx );
    _mesa_init_viewport( ctx );
 
@@ -969,6 +976,7 @@ _mesa_free_context_data( GLcontext *ctx )
    _mesa_free_sync_data(ctx);
 #endif
    _mesa_free_varray_data(ctx);
+   _mesa_free_transform_feedback(ctx);
 
    _mesa_delete_array_object(ctx, ctx->Array.DefaultArrayObj);
 
diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index f5c88a63e6..f9decc31ab 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -982,6 +982,16 @@ _mesa_set_enable(GLcontext *ctx, GLenum cap, GLboolean state)
 	 ctx->Texture.CubeMapSeamless = state;
 	 break;
 
+#if FEATURE_EXT_transform_feedback
+      case GL_RASTERIZER_DISCARD:
+	 CHECK_EXTENSION(EXT_transform_feedback, cap);
+         if (ctx->TransformFeedback.RasterDiscard != state) {
+            ctx->TransformFeedback.RasterDiscard = state;
+            FLUSH_VERTICES(ctx, _NEW_TRANSFORM);
+         }
+         break;
+#endif
+
       default:
          _mesa_error(ctx, GL_INVALID_ENUM,
                      "%s(0x%x)", state ? "glEnable" : "glDisable", cap);
@@ -1493,6 +1503,12 @@ _mesa_IsEnabled( GLenum cap )
 	 CHECK_EXTENSION(ARB_seamless_cube_map);
 	 return ctx->Texture.CubeMapSeamless;
 
+#if FEATURE_EXT_transform_feedback
+      case GL_RASTERIZER_DISCARD:
+	 CHECK_EXTENSION(EXT_transform_feedback);
+         return ctx->TransformFeedback.RasterDiscard;
+#endif
+
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glIsEnabled(0x%x)", (int) cap);
 	 return GL_FALSE;
diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index ca992d1261..f7b0e5abf5 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -146,6 +146,7 @@ static const struct {
    { OFF, "GL_EXT_texture_sRGB",               F(EXT_texture_sRGB) },
    { OFF, "GL_EXT_texture_swizzle",            F(EXT_texture_swizzle) },
    { OFF, "GL_EXT_timer_query",                F(EXT_timer_query) },
+   { OFF, "GL_EXT_transform_feedback",         F(EXT_transform_feedback) },
    { ON,  "GL_EXT_vertex_array",               F(EXT_vertex_array) },
    { OFF, "GL_EXT_vertex_array_bgra",          F(EXT_vertex_array_bgra) },
    { OFF, "GL_EXT_vertex_array_set",           F(EXT_vertex_array_set) },
@@ -319,6 +320,9 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
    ctx->Extensions.EXT_texture_sRGB = GL_TRUE;
 #endif
    ctx->Extensions.EXT_texture_swizzle = GL_TRUE;
+#if FEATURE_EXT_transform_feedback
+   ctx->Extensions.EXT_transform_feedback = GL_TRUE;
+#endif
    ctx->Extensions.EXT_vertex_array_bgra = GL_TRUE;
    /*ctx->Extensions.IBM_multimode_draw_arrays = GL_TRUE;*/
    ctx->Extensions.MESA_pack_invert = GL_TRUE;
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index 266fda40ec..eaa6d7f730 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -1922,6 +1922,26 @@ _mesa_GetBooleanv( GLenum pname, GLboolean *params )
          CHECK_EXT1(ARB_sync, "GetBooleanv");
          params[0] = INT64_TO_BOOLEAN(ctx->Const.MaxServerWaitTimeout);
          break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanv");
+         params[0] = INT_TO_BOOLEAN(ctx->TransformFeedback.CurrentBuffer->Name);
+         break;
+      case GL_RASTERIZER_DISCARD:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanv");
+         params[0] = ctx->TransformFeedback.RasterDiscard;
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanv");
+         params[0] = INT_TO_BOOLEAN(ctx->Const.MaxTransformFeedbackInterleavedComponents);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanv");
+         params[0] = INT_TO_BOOLEAN(ctx->Const.MaxTransformFeedbackSeparateAttribs);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanv");
+         params[0] = INT_TO_BOOLEAN(ctx->Const.MaxTransformFeedbackSeparateComponents);
+         break;
       case GL_NUM_EXTENSIONS:
          params[0] = INT_TO_BOOLEAN(_mesa_get_extension_count(ctx));
          break;
@@ -3793,6 +3813,26 @@ _mesa_GetFloatv( GLenum pname, GLfloat *params )
          CHECK_EXT1(ARB_sync, "GetFloatv");
          params[0] = (GLfloat)(ctx->Const.MaxServerWaitTimeout);
          break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+         CHECK_EXT1(EXT_transform_feedback, "GetFloatv");
+         params[0] = (GLfloat)(ctx->TransformFeedback.CurrentBuffer->Name);
+         break;
+      case GL_RASTERIZER_DISCARD:
+         CHECK_EXT1(EXT_transform_feedback, "GetFloatv");
+         params[0] = BOOLEAN_TO_FLOAT(ctx->TransformFeedback.RasterDiscard);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetFloatv");
+         params[0] = (GLfloat)(ctx->Const.MaxTransformFeedbackInterleavedComponents);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
+         CHECK_EXT1(EXT_transform_feedback, "GetFloatv");
+         params[0] = (GLfloat)(ctx->Const.MaxTransformFeedbackSeparateAttribs);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetFloatv");
+         params[0] = (GLfloat)(ctx->Const.MaxTransformFeedbackSeparateComponents);
+         break;
       case GL_NUM_EXTENSIONS:
          params[0] = (GLfloat)(_mesa_get_extension_count(ctx));
          break;
@@ -5664,6 +5704,26 @@ _mesa_GetIntegerv( GLenum pname, GLint *params )
          CHECK_EXT1(ARB_sync, "GetIntegerv");
          params[0] = INT64_TO_INT(ctx->Const.MaxServerWaitTimeout);
          break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerv");
+         params[0] = ctx->TransformFeedback.CurrentBuffer->Name;
+         break;
+      case GL_RASTERIZER_DISCARD:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerv");
+         params[0] = BOOLEAN_TO_INT(ctx->TransformFeedback.RasterDiscard);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerv");
+         params[0] = ctx->Const.MaxTransformFeedbackInterleavedComponents;
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerv");
+         params[0] = ctx->Const.MaxTransformFeedbackSeparateAttribs;
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerv");
+         params[0] = ctx->Const.MaxTransformFeedbackSeparateComponents;
+         break;
       case GL_NUM_EXTENSIONS:
          params[0] = _mesa_get_extension_count(ctx);
          break;
@@ -7536,6 +7596,26 @@ _mesa_GetInteger64v( GLenum pname, GLint64 *params )
          CHECK_EXT1(ARB_sync, "GetInteger64v");
          params[0] = ctx->Const.MaxServerWaitTimeout;
          break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64v");
+         params[0] = (GLint64)(ctx->TransformFeedback.CurrentBuffer->Name);
+         break;
+      case GL_RASTERIZER_DISCARD:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64v");
+         params[0] = BOOLEAN_TO_INT64(ctx->TransformFeedback.RasterDiscard);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64v");
+         params[0] = (GLint64)(ctx->Const.MaxTransformFeedbackInterleavedComponents);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64v");
+         params[0] = (GLint64)(ctx->Const.MaxTransformFeedbackSeparateAttribs);
+         break;
+      case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64v");
+         params[0] = (GLint64)(ctx->Const.MaxTransformFeedbackSeparateComponents);
+         break;
       case GL_NUM_EXTENSIONS:
          params[0] = (GLint64)(_mesa_get_extension_count(ctx));
          break;
@@ -7606,6 +7686,30 @@ _mesa_GetBooleanIndexedv( GLenum pname, GLuint index, GLboolean *params )
          params[2] = INT_TO_BOOLEAN(ctx->Color.ColorMask[index][BCOMP] ? 1 : 0);
          params[3] = INT_TO_BOOLEAN(ctx->Color.ColorMask[index][ACOMP] ? 1 : 0);
          break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_START:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanIndexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetBooleanIndexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = INT64_TO_BOOLEAN(ctx->TransformFeedback.Offset[index]);
+         break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanIndexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetBooleanIndexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = INT64_TO_BOOLEAN(ctx->TransformFeedback.Size[index]);
+         break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+         CHECK_EXT1(EXT_transform_feedback, "GetBooleanIndexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetBooleanIndexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = INT_TO_BOOLEAN(ctx->TransformFeedback.Buffers[index]->Name);
+         break;
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glGetBooleanIndexedv(pname=0x%x)", pname);
    }
@@ -7640,6 +7744,30 @@ _mesa_GetIntegerIndexedv( GLenum pname, GLuint index, GLint *params )
          params[2] = ctx->Color.ColorMask[index][BCOMP] ? 1 : 0;
          params[3] = ctx->Color.ColorMask[index][ACOMP] ? 1 : 0;
          break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_START:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerIndexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetIntegerIndexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = INT64_TO_INT(ctx->TransformFeedback.Offset[index]);
+         break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerIndexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetIntegerIndexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = INT64_TO_INT(ctx->TransformFeedback.Size[index]);
+         break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+         CHECK_EXT1(EXT_transform_feedback, "GetIntegerIndexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetIntegerIndexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = ctx->TransformFeedback.Buffers[index]->Name;
+         break;
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glGetIntegerIndexedv(pname=0x%x)", pname);
    }
@@ -7675,6 +7803,30 @@ _mesa_GetInteger64Indexedv( GLenum pname, GLuint index, GLint64 *params )
          params[2] = (GLint64)(ctx->Color.ColorMask[index][BCOMP] ? 1 : 0);
          params[3] = (GLint64)(ctx->Color.ColorMask[index][ACOMP] ? 1 : 0);
          break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_START:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64Indexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetInteger64Indexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = ctx->TransformFeedback.Offset[index];
+         break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_SIZE:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64Indexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetInteger64Indexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = ctx->TransformFeedback.Size[index];
+         break;
+      case GL_TRANSFORM_FEEDBACK_BUFFER_BINDING:
+         CHECK_EXT1(EXT_transform_feedback, "GetInteger64Indexedv");
+         if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+            _mesa_error(ctx, GL_INVALID_VALUE, "glGetInteger64Indexedv(index=%u), index", pname);
+            return;
+         }
+         params[0] = (GLint64)(ctx->TransformFeedback.Buffers[index]->Name);
+         break;
       default:
          _mesa_error(ctx, GL_INVALID_ENUM, "glGetInteger64Indexedv(pname=0x%x)", pname);
    }
diff --git a/src/mesa/main/get_gen.py b/src/mesa/main/get_gen.py
index cecb86d76a..bfaca1536d 100644
--- a/src/mesa/main/get_gen.py
+++ b/src/mesa/main/get_gen.py
@@ -1122,6 +1122,23 @@ StateVars = [
 	( "GL_MAX_SERVER_WAIT_TIMEOUT", GLint64, ["ctx->Const.MaxServerWaitTimeout"], "",
 	  NoState, ["ARB_sync"] ),
 
+	# GL_EXT_transform_feedback
+	( "GL_TRANSFORM_FEEDBACK_BUFFER_BINDING", GLint,
+	  ["ctx->TransformFeedback.CurrentBuffer->Name"], "",
+	  NoState, ["EXT_transform_feedback"] ),
+	( "GL_RASTERIZER_DISCARD", GLboolean,
+	  ["ctx->TransformFeedback.RasterDiscard"], "",
+	  NoState, ["EXT_transform_feedback"] ),
+	( "GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS", GLint,
+	  ["ctx->Const.MaxTransformFeedbackInterleavedComponents"], "",
+	  NoState, ["EXT_transform_feedback"] ),
+	( "GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS", GLint,
+	  ["ctx->Const.MaxTransformFeedbackSeparateAttribs"], "",
+	  NoState, ["EXT_transform_feedback"] ),
+	( "GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS", GLint,
+	  ["ctx->Const.MaxTransformFeedbackSeparateComponents"], "",
+	  NoState, ["EXT_transform_feedback"] ),
+
 	# GL3
 	( "GL_NUM_EXTENSIONS", GLint, ["_mesa_get_extension_count(ctx)"], "", NoState, NoExt ),
 	( "GL_MAJOR_VERSION", GLint, ["ctx->VersionMajor"], "", NoState, NoExt ),
@@ -1134,6 +1151,7 @@ StateVars = [
 # The tuples are the same as above, with one exception: the "optional"
 # code field is instead the max legal index value.
 IndexedStateVars = [
+	# GL_EXT_draw_buffers2 / GL3
 	( "GL_BLEND", GLint, ["((ctx->Color.BlendEnabled >> index) & 1)"],
 	  "ctx->Const.MaxDrawBuffers", NoState, ["EXT_draw_buffers2"] ),
 	( "GL_COLOR_WRITEMASK", GLint,
@@ -1142,6 +1160,21 @@ IndexedStateVars = [
 		"ctx->Color.ColorMask[index][BCOMP] ? 1 : 0",
 		"ctx->Color.ColorMask[index][ACOMP] ? 1 : 0" ],
 	  "ctx->Const.MaxDrawBuffers", NoState, ["EXT_draw_buffers2"] ),
+
+	# GL_EXT_transform_feedback
+	( "GL_TRANSFORM_FEEDBACK_BUFFER_START", GLint64,
+	  ["ctx->TransformFeedback.Offset[index]"],
+	  "ctx->Const.MaxTransformFeedbackSeparateAttribs",
+	  NoState, ["EXT_transform_feedback"] ),
+	( "GL_TRANSFORM_FEEDBACK_BUFFER_SIZE", GLint64,
+	  ["ctx->TransformFeedback.Size[index]"],
+	  "ctx->Const.MaxTransformFeedbackSeparateAttribs",
+	  NoState, ["EXT_transform_feedback"] ),
+	( "GL_TRANSFORM_FEEDBACK_BUFFER_BINDING", GLint,
+	  ["ctx->TransformFeedback.Buffers[index]->Name"],
+	  "ctx->Const.MaxTransformFeedbackSeparateAttribs",
+	  NoState, ["EXT_transform_feedback"] ),
+
 	# XXX more to come...
 ]
 
diff --git a/src/mesa/main/mfeatures.h b/src/mesa/main/mfeatures.h
index 54edf9e7f0..6ed05da7ac 100644
--- a/src/mesa/main/mfeatures.h
+++ b/src/mesa/main/mfeatures.h
@@ -135,6 +135,7 @@
 #define FEATURE_EXT_framebuffer_object    1
 #define FEATURE_EXT_pixel_buffer_object   1
 #define FEATURE_EXT_texture_sRGB          FEATURE_GL
+#define FEATURE_EXT_transform_feedback    FEATURE_GL
 
 #define FEATURE_APPLE_object_purgeable    FEATURE_GL
 #define FEATURE_ATI_fragment_shader       FEATURE_GL
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 82e004f348..7657efb077 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1910,6 +1910,11 @@ struct gl_query_state
 
    /** GL_NV_conditional_render */
    struct gl_query_object *CondRenderQuery;
+
+   /** GL_EXT_transform_feedback */
+   struct gl_query_object *PrimitivesGenerated;
+   struct gl_query_object *PrimitivesWritten;
+
    GLenum CondRenderMode;
 };
 
@@ -1976,6 +1981,13 @@ struct gl_shader_program
    /** User-defined attribute bindings (glBindAttribLocation) */
    struct gl_program_parameter_list *Attributes;
 
+   /** Transform feedback varyings */
+   struct {
+      GLenum BufferMode;
+      GLuint NumVarying;
+      GLchar **VaryingNames;  /**< Array [NumVarying] of char * */
+   } TransformFeedback;
+
    /* post-link info: */
    struct gl_vertex_program *VertexProgram;     /**< Linked vertex program */
    struct gl_fragment_program *FragmentProgram; /**< Linked fragment prog */
@@ -2017,6 +2029,29 @@ struct gl_shader_state
 
 
 /**
+ * Context state for transform feedback.
+ */
+struct gl_transform_feedback
+{
+   GLboolean Active;  /**< Is transform feedback enabled? */
+   GLenum Mode;       /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
+   /** Start of feedback data in dest buffer */
+   GLintptr Offset[MAX_FEEDBACK_ATTRIBS];
+   /** Max data to put into dest buffer (in bytes) */
+   GLsizeiptr Size[MAX_FEEDBACK_ATTRIBS];
+   GLboolean RasterDiscard;  /**< GL_RASTERIZER_DISCARD */
+
+   /** The general binding point (GL_TRANSFORM_FEEDBACK_BUFFER) */
+   struct gl_buffer_object *CurrentBuffer;
+
+   /** The feedback buffers */
+   GLuint BufferNames[MAX_FEEDBACK_ATTRIBS];
+   struct gl_buffer_object *Buffers[MAX_FEEDBACK_ATTRIBS];
+};
+
+
+
+/**
  * State which can be shared by multiple contexts:
  */
 struct gl_shared_state
@@ -2388,6 +2423,11 @@ struct gl_constants
 
    /**< OpenGL version 3.x */
    GLbitfield ContextFlags;  /**< Ex: GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT */
+
+   /** GL_EXT_transform_feedback */
+   GLuint MaxTransformFeedbackSeparateAttribs;
+   GLuint MaxTransformFeedbackSeparateComponents;
+   GLuint MaxTransformFeedbackInterleavedComponents;
 };
 
 
@@ -2489,6 +2529,7 @@ struct gl_extensions
    GLboolean EXT_texture_mirror_clamp;
    GLboolean EXT_texture_sRGB;
    GLboolean EXT_texture_swizzle;
+   GLboolean EXT_transform_feedback;
    GLboolean EXT_timer_query;
    GLboolean EXT_vertex_array;
    GLboolean EXT_vertex_array_bgra;
@@ -2956,6 +2997,8 @@ struct __GLcontextRec
 
    struct gl_query_state Query;  /**< occlusion, timer queries */
 
+   struct gl_transform_feedback TransformFeedback;
+
    struct gl_buffer_object *CopyReadBuffer; /**< GL_ARB_copy_buffer */
    struct gl_buffer_object *CopyWriteBuffer; /**< GL_ARB_copy_buffer */
    /*@}*/
diff --git a/src/mesa/main/queryobj.c b/src/mesa/main/queryobj.c
index e14511a388..a907dac836 100644
--- a/src/mesa/main/queryobj.c
+++ b/src/mesa/main/queryobj.c
@@ -130,6 +130,42 @@ _mesa_init_query_object_functions(struct dd_function_table *driver)
 }
 
 
+/**
+ * Return pointer to the query object binding point for the given target.
+ * \return NULL if invalid target, else the address of binding point
+ */
+static struct gl_query_object **
+get_query_binding_point(GLcontext *ctx, GLenum target)
+{
+   switch (target) {
+   case GL_SAMPLES_PASSED_ARB:
+      if (ctx->Extensions.ARB_occlusion_query)
+         return &ctx->Query.CurrentOcclusionObject;
+      else
+         return NULL;
+   case GL_TIME_ELAPSED_EXT:
+      if (ctx->Extensions.EXT_timer_query)
+         return &ctx->Query.CurrentTimerObject;
+      else
+         return NULL;
+#if FEATURE_EXT_transform_feedback
+   case GL_PRIMITIVES_GENERATED:
+      if (ctx->Extensions.EXT_transform_feedback)
+         return &ctx->Query.PrimitivesGenerated;
+      else
+         return NULL;
+   case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
+      if (ctx->Extensions.EXT_transform_feedback)
+         return &ctx->Query.PrimitivesWritten;
+      else
+         return NULL;
+#endif
+   default:
+      return NULL;
+   }
+}
+
+
 void GLAPIENTRY
 _mesa_GenQueriesARB(GLsizei n, GLuint *ids)
 {
@@ -214,36 +250,16 @@ _mesa_IsQueryARB(GLuint id)
 static void GLAPIENTRY
 _mesa_BeginQueryARB(GLenum target, GLuint id)
 {
-   struct gl_query_object *q;
+   struct gl_query_object *q, **bindpt;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    FLUSH_VERTICES(ctx, _NEW_DEPTH);
 
-   switch (target) {
-      case GL_SAMPLES_PASSED_ARB:
-         if (!ctx->Extensions.ARB_occlusion_query) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glBeginQueryARB(target)");
-            return;
-         }
-         if (ctx->Query.CurrentOcclusionObject) {
-            _mesa_error(ctx, GL_INVALID_OPERATION, "glBeginQueryARB");
-            return;
-         }
-         break;
-      case GL_TIME_ELAPSED_EXT:
-         if (!ctx->Extensions.EXT_timer_query) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glBeginQueryARB(target)");
-            return;
-         }
-         if (ctx->Query.CurrentTimerObject) {
-            _mesa_error(ctx, GL_INVALID_OPERATION, "glBeginQueryARB");
-            return;
-         }
-         break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glBeginQueryARB(target)");
-         return;
+   bindpt = get_query_binding_point(ctx, target);
+   if (!bindpt) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBeginQueryARB(target)");
+      return;
    }
 
    if (id == 0) {
@@ -275,12 +291,8 @@ _mesa_BeginQueryARB(GLenum target, GLuint id)
    q->Result = 0;
    q->Ready = GL_FALSE;
 
-   if (target == GL_SAMPLES_PASSED_ARB) {
-      ctx->Query.CurrentOcclusionObject = q;
-   }
-   else if (target == GL_TIME_ELAPSED_EXT) {
-      ctx->Query.CurrentTimerObject = q;
-   }
+   /* XXX should probably refcount query objects */
+   *bindpt = q;
 
    ctx->Driver.BeginQuery(ctx, q);
 }
@@ -289,34 +301,22 @@ _mesa_BeginQueryARB(GLenum target, GLuint id)
 static void GLAPIENTRY
 _mesa_EndQueryARB(GLenum target)
 {
-   struct gl_query_object *q;
+   struct gl_query_object *q, **bindpt;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
    FLUSH_VERTICES(ctx, _NEW_DEPTH);
 
-   switch (target) {
-      case GL_SAMPLES_PASSED_ARB:
-         if (!ctx->Extensions.ARB_occlusion_query) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glEndQueryARB(target)");
-            return;
-         }
-         q = ctx->Query.CurrentOcclusionObject;
-         ctx->Query.CurrentOcclusionObject = NULL;
-         break;
-      case GL_TIME_ELAPSED_EXT:
-         if (!ctx->Extensions.EXT_timer_query) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glEndQueryARB(target)");
-            return;
-         }
-         q = ctx->Query.CurrentTimerObject;
-         ctx->Query.CurrentTimerObject = NULL;
-         break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glEndQueryARB(target)");
-         return;
+   bindpt = get_query_binding_point(ctx, target);
+   if (!bindpt) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glEndQueryARB(target)");
+      return;
    }
 
+   /* XXX should probably refcount query objects */
+   q = *bindpt;
+   *bindpt = NULL;
+
    if (!q || !q->Active) {
       _mesa_error(ctx, GL_INVALID_OPERATION,
                   "glEndQueryARB(no matching glBeginQueryARB)");
@@ -331,30 +331,18 @@ _mesa_EndQueryARB(GLenum target)
 void GLAPIENTRY
 _mesa_GetQueryivARB(GLenum target, GLenum pname, GLint *params)
 {
-   struct gl_query_object *q;
+   struct gl_query_object *q, **bindpt;
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   switch (target) {
-      case GL_SAMPLES_PASSED_ARB:
-         if (!ctx->Extensions.ARB_occlusion_query) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glEndQueryARB(target)");
-            return;
-         }
-         q = ctx->Query.CurrentOcclusionObject;
-         break;
-      case GL_TIME_ELAPSED_EXT:
-         if (!ctx->Extensions.EXT_timer_query) {
-            _mesa_error(ctx, GL_INVALID_ENUM, "glEndQueryARB(target)");
-            return;
-         }
-         q = ctx->Query.CurrentTimerObject;
-         break;
-      default:
-         _mesa_error(ctx, GL_INVALID_ENUM, "glGetQueryivARB(target)");
-         return;
+   bindpt = get_query_binding_point(ctx, target);
+   if (!bindpt) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetQueryARB(target)");
+      return;
    }
 
+   q = *bindpt;
+
    switch (pname) {
       case GL_QUERY_COUNTER_BITS_ARB:
          *params = 8 * sizeof(q->Result);
diff --git a/src/mesa/main/texcompress_s3tc.c b/src/mesa/main/texcompress_s3tc.c
index fcd28a4b4e..12c2e903eb 100644
--- a/src/mesa/main/texcompress_s3tc.c
+++ b/src/mesa/main/texcompress_s3tc.c
@@ -48,7 +48,7 @@
 #if FEATURE_texture_s3tc
 
 
-#ifdef __MINGW32__
+#if defined(_WIN32) || defined(WIN32)
 #define DXTN_LIBNAME "dxtn.dll"
 #define RTLD_LAZY 0
 #define RTLD_GLOBAL 0
diff --git a/src/mesa/main/transformfeedback.c b/src/mesa/main/transformfeedback.c
new file mode 100644
index 0000000000..3490110bae
--- /dev/null
+++ b/src/mesa/main/transformfeedback.c
@@ -0,0 +1,427 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2010  VMware, Inc.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * Vertex transform feedback support.
+ *
+ * Authors:
+ *   Brian Paul
+ */
+
+
+#include "buffers.h"
+#include "bufferobj.h"
+#include "context.h"
+#include "enums.h"
+#include "transformfeedback.h"
+
+#include "shader/prog_parameter.h"
+#include "shader/shader_api.h"
+
+
+/**
+ * Check if the given primitive mode (as in glBegin(mode)) is compatible
+ * with the current transform feedback mode (if it's enabled).
+ * This is to be called from glBegin(), glDrawArrays(), glDrawElements(), etc.
+ *
+ * \return GL_TRUE if the mode is OK, GL_FALSE otherwise.
+ */
+GLboolean
+_mesa_validate_primitive_mode(GLcontext *ctx, GLenum mode)
+{
+   if (ctx->TransformFeedback.Active) {
+      switch (mode) {
+      case GL_POINTS:
+         return ctx->TransformFeedback.Mode == GL_POINTS;
+      case GL_LINES:
+      case GL_LINE_STRIP:
+      case GL_LINE_LOOP:
+         return ctx->TransformFeedback.Mode == GL_LINES;
+      default:
+         return ctx->TransformFeedback.Mode == GL_TRIANGLES;
+      }
+   }
+   return GL_TRUE;
+}
+
+
+/**
+ * Check that all the buffer objects currently bound for transform
+ * feedback actually exist.  Raise a GL_INVALID_OPERATION error if
+ * any buffers are missing.
+ * \return GL_TRUE for success, GL_FALSE if error
+ */
+GLboolean
+_mesa_validate_transform_feedback_buffers(GLcontext *ctx)
+{
+
+   return GL_TRUE;
+}
+
+
+
+/**
+ * Per-context init for transform feedback.
+ */
+void
+_mesa_init_transform_feedback(GLcontext *ctx)
+{
+   _mesa_reference_buffer_object(ctx,
+                                 &ctx->TransformFeedback.CurrentBuffer,
+                                 ctx->Shared->NullBufferObj);
+}
+
+
+/**
+ * Per-context free/clean-up for transform feedback.
+ */
+void
+_mesa_free_transform_feedback(GLcontext *ctx)
+{
+   _mesa_reference_buffer_object(ctx,
+                                 &ctx->TransformFeedback.CurrentBuffer,
+                                 NULL);
+}
+
+
+void GLAPIENTRY
+_mesa_BeginTransformFeedback(GLenum mode)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   switch (mode) {
+   case GL_POINTS:
+   case GL_LINES:
+   case GL_TRIANGLES:
+      /* legal */
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBeginTransformFeedback(mode)");
+      return;
+   }
+
+   if (ctx->TransformFeedback.Active) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBeginTransformFeedback(already active)");
+      return;
+   }
+
+   ctx->TransformFeedback.Active = GL_TRUE;
+   ctx->TransformFeedback.Mode = mode;
+}
+
+
+void GLAPIENTRY
+_mesa_EndTransformFeedback(void)
+{
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (!ctx->TransformFeedback.Active) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glEndTransformFeedback(not active)");
+      return;
+   }
+
+   ctx->TransformFeedback.Active = GL_FALSE;
+}
+
+
+/**
+ * Helper used by BindBufferRange() and BindBufferBase().
+ */
+static void
+bind_buffer_range(GLcontext *ctx, GLuint index,
+                  struct gl_buffer_object *bufObj,
+                  GLintptr offset, GLsizeiptr size)
+{
+   /* The general binding point */
+   _mesa_reference_buffer_object(ctx,
+                                 &ctx->TransformFeedback.CurrentBuffer,
+                                 bufObj);
+
+   /* The per-attribute binding point */
+   _mesa_reference_buffer_object(ctx,
+                                 &ctx->TransformFeedback.Buffers[index],
+                                 bufObj);
+
+   ctx->TransformFeedback.BufferNames[index] = bufObj->Name;
+
+   ctx->TransformFeedback.Offset[index] = offset;
+   ctx->TransformFeedback.Size[index] = size;
+}
+
+
+/**
+ * Specify a buffer object to receive vertex shader results.  Plus,
+ * specify the starting offset to place the results, and max size.
+ */
+void GLAPIENTRY
+_mesa_BindBufferRange(GLenum target, GLuint index,
+                      GLuint buffer, GLintptr offset, GLsizeiptr size)
+{
+   struct gl_buffer_object *bufObj;
+   GET_CURRENT_CONTEXT(ctx);
+
+   if (target != GL_TRANSFORM_FEEDBACK_BUFFER) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferRange(target)");
+      return;
+   }
+
+   if (ctx->TransformFeedback.Active) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBindBufferRange(transform feedback active)");
+      return;
+   }
+
+   if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(index=%d)", index);
+      return;
+   }
+
+   if ((size <= 0) || (size & 0x3)) {
+      /* must be positive and multiple of four */
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferRange(size%d)", size);
+      return;
+   }  
+
+   if (offset & 0x3) {
+      /* must be multiple of four */
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glBindBufferRange(offset=%d)", offset);
+      return;
+   }  
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!bufObj) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBindBufferRange(invalid buffer=%u)", buffer);
+      return;
+   }
+
+   if (offset + size >= bufObj->Size) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glBindBufferRange(offset + size > buffer size)", size);
+      return;
+   }  
+
+   bind_buffer_range(ctx, index, bufObj, offset, size);
+}
+
+
+/**
+ * Specify a buffer object to receive vertex shader results.
+ * As above, but start at offset = 0.
+ */
+void GLAPIENTRY
+_mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer)
+{
+   struct gl_buffer_object *bufObj;
+   GET_CURRENT_CONTEXT(ctx);
+   GLsizeiptr size;
+
+   if (target != GL_TRANSFORM_FEEDBACK_BUFFER) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferBase(target)");
+      return;
+   }
+
+   if (ctx->TransformFeedback.Active) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBindBufferRange(transform feedback active)");
+      return;
+   }
+
+   if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glBindBufferBase(index=%d)", index);
+      return;
+   }
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!bufObj) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBindBufferBase(invalid buffer=%u)", buffer);
+      return;
+   }
+
+   /* default size is the buffer size rounded down to nearest
+    * multiple of four.
+    */
+   size = bufObj->Size & ~0x3;
+
+   bind_buffer_range(ctx, index, bufObj, 0, size);
+}
+
+
+/**
+ * Specify a buffer object to receive vertex shader results, plus the
+ * offset in the buffer to start placing results.
+ * This function is part of GL_EXT_transform_feedback, but not GL3.
+ */
+void GLAPIENTRY
+_mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
+                          GLintptr offset)
+{
+   struct gl_buffer_object *bufObj;
+   GET_CURRENT_CONTEXT(ctx);
+   GLsizeiptr size;
+
+   if (target != GL_TRANSFORM_FEEDBACK_BUFFER) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glBindBufferOffsetEXT(target)");
+      return;
+   }
+
+   if (ctx->TransformFeedback.Active) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBindBufferRange(transform feedback active)");
+      return;
+   }
+
+   if (index >= ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glBindBufferOffsetEXT(index=%d)", index);
+      return;
+   }
+
+   bufObj = _mesa_lookup_bufferobj(ctx, buffer);
+   if (!bufObj) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "glBindBufferOffsetEXT(invalid buffer=%u)", buffer);
+      return;
+   }
+
+   /* default size is the buffer size rounded down to nearest
+    * multiple of four.
+    */
+   size = (bufObj->Size - offset) & ~0x3;
+
+   bind_buffer_range(ctx, index, bufObj, offset, size);
+}
+
+
+/**
+ * This function specifies the vertex shader outputs to be written
+ * to the feedback buffer(s), and in what order.
+ */
+void GLAPIENTRY
+_mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
+                                const GLchar **varyings, GLenum bufferMode)
+{
+   struct gl_shader_program *shProg;
+   GLuint i;
+   GET_CURRENT_CONTEXT(ctx);
+
+   switch (bufferMode) {
+   case GL_INTERLEAVED_ATTRIBS:
+      break;
+   case GL_SEPARATE_ATTRIBS:
+      break;
+   default:
+      _mesa_error(ctx, GL_INVALID_ENUM,
+                  "glTransformFeedbackVaryings(bufferMode)");
+      return;
+   }
+
+   if (count < 0 || count > ctx->Const.MaxTransformFeedbackSeparateAttribs) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glTransformFeedbackVaryings(count=%d)", count);
+      return;
+   }
+
+   shProg = _mesa_lookup_shader_program(ctx, program);
+   if (!shProg) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glTransformFeedbackVaryings(program=%u)", program);
+      return;
+   }
+
+   /* free existing varyings, if any */
+   for (i = 0; i < shProg->TransformFeedback.NumVarying; i++) {
+      free(shProg->TransformFeedback.VaryingNames[i]);
+   }
+   free(shProg->TransformFeedback.VaryingNames);
+
+   /* allocate new memory for varying names */
+   shProg->TransformFeedback.VaryingNames =
+      (GLchar **) malloc(count * sizeof(GLchar *));
+
+   if (!shProg->TransformFeedback.VaryingNames) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTransformFeedbackVaryings()");
+      return;
+   }
+
+   /* Save the new names and the count */
+   for (i = 0; i < (GLuint) count; i++) {
+      shProg->TransformFeedback.VaryingNames[i] = _mesa_strdup(varyings[i]);
+   }
+   shProg->TransformFeedback.NumVarying = count;
+
+   shProg->TransformFeedback.BufferMode = bufferMode;
+
+   /* The varyings won't be used until shader link time */
+}
+
+
+/**
+ * Get info about the vertex shader's outputs which are to be written
+ * to the feedback buffer(s).
+ */
+void GLAPIENTRY
+_mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
+                                  GLsizei bufSize, GLsizei *length,
+                                  GLsizei *size, GLenum *type, GLchar *name)
+{
+   const struct gl_shader_program *shProg;
+   const GLchar *varyingName;
+   GLint v;
+   GET_CURRENT_CONTEXT(ctx);
+
+   shProg = _mesa_lookup_shader_program(ctx, program);
+   if (!shProg) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glGetTransformFeedbackVaryings(program=%u)", program);
+      return;
+   }
+
+   if (index >= shProg->TransformFeedback.NumVarying) {
+      _mesa_error(ctx, GL_INVALID_VALUE,
+                  "glGetTransformFeedbackVaryings(index=%u)", index);
+      return;
+   }
+
+   varyingName = shProg->TransformFeedback.VaryingNames[index];
+
+   v = _mesa_lookup_parameter_index(shProg->Varying, -1, varyingName);
+   if (v >= 0) {
+      struct gl_program_parameter *param = &shProg->Varying->Parameters[v];
+
+      /* return the varying's name and length */
+      _mesa_copy_string(name, bufSize, length, varyingName);
+
+      /* return the datatype and value's size (in datatype units) */
+      if (type)
+         *type = param->Type;
+      if (size)
+         *size = param->Size;
+   }
+}
+
diff --git a/src/mesa/main/transformfeedback.h b/src/mesa/main/transformfeedback.h
new file mode 100644
index 0000000000..e89cc41473
--- /dev/null
+++ b/src/mesa/main/transformfeedback.h
@@ -0,0 +1,71 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2010  VMware, Inc.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef TRANSFORM_FEEDBACK_H
+#define TRANSFORM_FEEDBACK_H
+
+#include "glheader.h"
+
+
+extern GLboolean
+_mesa_validate_primitive_mode(GLcontext *ctx, GLenum mode);
+
+extern GLboolean
+_mesa_validate_transform_feedback_buffers(GLcontext *ctx);
+
+extern void
+_mesa_init_transform_feedback(GLcontext *ctx);
+
+extern void
+_mesa_free_transform_feedback(GLcontext *ctx);
+
+
+extern void GLAPIENTRY
+_mesa_BeginTransformFeedback(GLenum mode);
+
+extern void GLAPIENTRY
+_mesa_EndTransformFeedback(void);
+
+extern void GLAPIENTRY
+_mesa_BindBufferRange(GLenum target, GLuint index,
+                      GLuint buffer, GLintptr offset, GLsizeiptr size);
+
+extern void GLAPIENTRY
+_mesa_BindBufferBase(GLenum target, GLuint index, GLuint buffer);
+
+extern void GLAPIENTRY
+_mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
+                          GLintptr offset);
+
+extern void GLAPIENTRY
+_mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
+                                const GLchar **varyings, GLenum bufferMode);
+
+extern void GLAPIENTRY
+_mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
+                                  GLsizei bufSize, GLsizei *length,
+                                  GLsizei *size, GLenum *type, GLchar *name);
+
+
+#endif /* TRANSFORM_FEEDBACK_H */