mesa: replace GLenum with GLenum16 in common structures (v4)

v2: - fix glGet*
    - also use GLenum16 for DrawBuffers
v3: - rebase to top of tree (BrianP) and incorporate Ian's suggestions
v4: - fix a GLenum16 bug in VBO/save code, add some STATIC_ASSERT()s

gl_context = 152432 -> 136840 bytes
vbo_context = 22096 -> 20608 bytes

Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Nicolai Hähnle <[email protected]>

8 files changed, 237 insertions, 187 deletions

diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index 50b65c413e5..3c12fd6824d 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -1005,11 +1005,16 @@ _mesa_PopAttrib(void)
                    * user FBO bound, GL_FRONT will be illegal and we'll need
                    * to record that error.  Per OpenGL ARB decision.
                    */
-                  if (multipleBuffers)
-                     _mesa_DrawBuffers(ctx->Const.MaxDrawBuffers,
-                                          color->DrawBuffer);
-                  else
+                  if (multipleBuffers) {
+                     GLenum buffers[MAX_DRAW_BUFFERS];
+
+                     for (unsigned i = 0; i < ctx->Const.MaxDrawBuffers; i++)
+                        buffers[i] = color->DrawBuffer[i];
+
+                     _mesa_DrawBuffers(ctx->Const.MaxDrawBuffers, buffers);
+                  } else {
                      _mesa_DrawBuffer(color->DrawBuffer[0]);
+                  }
                }
                _mesa_set_enable(ctx, GL_ALPHA_TEST, color->AlphaEnabled);
                _mesa_AlphaFunc(color->AlphaFunc, color->AlphaRefUnclamped);
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index d3640479f00..5492227de08 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -299,7 +299,8 @@ draw_buffer(struct gl_context *ctx, struct gl_framebuffer *fb,
    }
 
    /* if we get here, there's no error so set new state */
-   _mesa_drawbuffers(ctx, fb, 1, &buffer, &destMask);
+   const GLenum16 buffer16 = buffer;
+   _mesa_drawbuffers(ctx, fb, 1, &buffer16, &destMask);
 
    /* Call device driver function only if fb is the bound draw buffer */
    if (fb == ctx->DrawBuffer) {
@@ -573,7 +574,11 @@ draw_buffers(struct gl_context *ctx, struct gl_framebuffer *fb, GLsizei n,
    }
 
    /* OK, if we get here, there were no errors so set the new state */
-   _mesa_drawbuffers(ctx, fb, n, buffers, destMask);
+   GLenum16 buffers16[MAX_DRAW_BUFFERS];
+   for (int i = 0; i < n; i++)
+      buffers16[i] = buffers[i];
+
+   _mesa_drawbuffers(ctx, fb, n, buffers16, destMask);
 
    /*
     * Call device driver function if fb is the bound draw buffer.
@@ -694,7 +699,8 @@ updated_drawbuffers(struct gl_context *ctx, struct gl_framebuffer *fb)
  */
 void
 _mesa_drawbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
-                  GLuint n, const GLenum *buffers, const GLbitfield *destMask)
+                  GLuint n, const GLenum16 *buffers,
+                  const GLbitfield *destMask)
 {
    GLbitfield mask[MAX_DRAW_BUFFERS];
    GLuint buf;
diff --git a/src/mesa/main/buffers.h b/src/mesa/main/buffers.h
index e48400668d0..c43810752b0 100644
--- a/src/mesa/main/buffers.h
+++ b/src/mesa/main/buffers.h
@@ -68,7 +68,7 @@ _mesa_NamedFramebufferDrawBuffers(GLuint framebuffer, GLsizei n,
 
 extern void
 _mesa_drawbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
-                  GLuint n, const GLenum *buffers,
+                  GLuint n, const GLenum16 *buffers,
                   const GLbitfield *destMask);
 
 extern void
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index a52c98112e0..7dbf67871dd 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -1583,7 +1583,7 @@ handle_first_current(struct gl_context *ctx)
     */
    if (!ctx->HasConfig && _mesa_is_desktop_gl(ctx)) {
       if (ctx->DrawBuffer != _mesa_get_incomplete_framebuffer()) {
-         GLenum buffer;
+         GLenum16 buffer;
 
          if (ctx->DrawBuffer->Visual.doubleBufferMode)
             buffer = GL_BACK;
diff --git a/src/mesa/main/get.c b/src/mesa/main/get.c
index bafd1e35b29..04cab91d9c1 100644
--- a/src/mesa/main/get.c
+++ b/src/mesa/main/get.c
@@ -101,6 +101,7 @@ enum value_type {
    TYPE_UINT_3,
    TYPE_UINT_4,
    TYPE_INT64,
+   TYPE_ENUM16,
    TYPE_ENUM,
    TYPE_ENUM_2,
    TYPE_BOOLEAN,
@@ -206,12 +207,14 @@ union value {
 
 #define BUFFER_INT(field) BUFFER_FIELD(field, TYPE_INT)
 #define BUFFER_ENUM(field) BUFFER_FIELD(field, TYPE_ENUM)
+#define BUFFER_ENUM16(field) BUFFER_FIELD(field, TYPE_ENUM16)
 #define BUFFER_BOOL(field) BUFFER_FIELD(field, TYPE_BOOLEAN)
 
 #define CONTEXT_INT(field) CONTEXT_FIELD(field, TYPE_INT)
 #define CONTEXT_INT2(field) CONTEXT_FIELD(field, TYPE_INT_2)
 #define CONTEXT_INT64(field) CONTEXT_FIELD(field, TYPE_INT64)
 #define CONTEXT_UINT(field) CONTEXT_FIELD(field, TYPE_UINT)
+#define CONTEXT_ENUM16(field) CONTEXT_FIELD(field, TYPE_ENUM16)
 #define CONTEXT_ENUM(field) CONTEXT_FIELD(field, TYPE_ENUM)
 #define CONTEXT_ENUM2(field) CONTEXT_FIELD(field, TYPE_ENUM_2)
 #define CONTEXT_BOOL(field) CONTEXT_FIELD(field, TYPE_BOOLEAN)
@@ -233,6 +236,7 @@ union value {
 
 #define ARRAY_INT(field) ARRAY_FIELD(field, TYPE_INT)
 #define ARRAY_ENUM(field) ARRAY_FIELD(field, TYPE_ENUM)
+#define ARRAY_ENUM16(field) ARRAY_FIELD(field, TYPE_ENUM16)
 #define ARRAY_BOOL(field) ARRAY_FIELD(field, TYPE_BOOLEAN)
 
 #define EXT(f)					\
@@ -1488,6 +1492,8 @@ get_value_size(enum value_type type, const union value *v)
    case TYPE_INT64:
       return sizeof(GLint64);
       break;
+   case TYPE_ENUM16:
+      return sizeof(GLenum16);
    case TYPE_ENUM:
       return sizeof(GLenum);
    case TYPE_ENUM_2:
@@ -1588,6 +1594,10 @@ _mesa_GetBooleanv(GLenum pname, GLboolean *params)
       params[0] = INT_TO_BOOLEAN(((GLint *) p)[0]);
       break;
 
+   case TYPE_ENUM16:
+      params[0] = INT_TO_BOOLEAN(((GLenum16 *) p)[0]);
+      break;
+
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
          params[i] = INT_TO_BOOLEAN(v.value_int_n.ints[i]);
@@ -1681,6 +1691,10 @@ _mesa_GetFloatv(GLenum pname, GLfloat *params)
       params[0] = (GLfloat) (((GLint *) p)[0]);
       break;
 
+   case TYPE_ENUM16:
+      params[0] = (GLfloat) (((GLenum16 *) p)[0]);
+      break;
+
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
          params[i] = (GLfloat) v.value_int_n.ints[i];
@@ -1794,6 +1808,10 @@ _mesa_GetIntegerv(GLenum pname, GLint *params)
       params[0] = ((GLint *) p)[0];
       break;
 
+   case TYPE_ENUM16:
+      params[0] = ((GLenum16 *) p)[0];
+      break;
+
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
          params[i] = v.value_int_n.ints[i];
@@ -1893,6 +1911,10 @@ _mesa_GetInteger64v(GLenum pname, GLint64 *params)
       params[0] = ((GLint *) p)[0];
       break;
 
+   case TYPE_ENUM16:
+      params[0] = ((GLenum16 *) p)[0];
+      break;
+
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
          params[i] = INT_TO_BOOLEAN(v.value_int_n.ints[i]);
@@ -1996,6 +2018,10 @@ _mesa_GetDoublev(GLenum pname, GLdouble *params)
       params[0] = ((GLint *) p)[0];
       break;
 
+   case TYPE_ENUM16:
+      params[0] = ((GLenum16 *) p)[0];
+      break;
+
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
          params[i] = v.value_int_n.ints[i];
@@ -2113,6 +2139,11 @@ _mesa_GetUnsignedBytevEXT(GLenum pname, GLubyte *data)
    case TYPE_MATRIX_T:
       memcpy(data, p, size);
       break;
+   case TYPE_ENUM16: {
+      GLenum e = *(GLenum16 *)p;
+      memcpy(data, &e, sizeof(e));
+      break;
+   }
    default:
       break; /* nothing - GL error was recorded */
    }
@@ -2708,6 +2739,7 @@ _mesa_GetFloati_v(GLenum pname, GLuint index, GLfloat *params)
       params[1] = (GLfloat) v.value_int_4[1];
    case TYPE_INT:
    case TYPE_ENUM:
+   case TYPE_ENUM16:
       params[0] = (GLfloat) v.value_int_4[0];
       break;
 
@@ -2790,6 +2822,7 @@ _mesa_GetDoublei_v(GLenum pname, GLuint index, GLdouble *params)
       params[1] = (GLdouble) v.value_int_4[1];
    case TYPE_INT:
    case TYPE_ENUM:
+   case TYPE_ENUM16:
       params[0] = (GLdouble) v.value_int_4[0];
       break;
 
@@ -2864,6 +2897,7 @@ _mesa_GetUnsignedBytei_vEXT(GLenum target, GLuint index, GLubyte *data)
    case TYPE_INT_4:
    case TYPE_UINT_4:
    case TYPE_INT64:
+   case TYPE_ENUM16:
    case TYPE_ENUM:
    case TYPE_ENUM_2:
    case TYPE_BOOLEAN:
@@ -2943,6 +2977,10 @@ _mesa_GetFixedv(GLenum pname, GLfixed *params)
       params[0] = INT_TO_FIXED(((GLint *) p)[0]);
       break;
 
+   case TYPE_ENUM16:
+      params[0] = INT_TO_FIXED(((GLenum16 *) p)[0]);
+      break;
+
    case TYPE_INT_N:
       for (i = 0; i < v.value_int_n.n; i++)
          params[i] = INT_TO_FIXED(v.value_int_n.ints[i]);
diff --git a/src/mesa/main/get_hash_params.py b/src/mesa/main/get_hash_params.py
index bc71574cca9..0edf4c61c8c 100644
--- a/src/mesa/main/get_hash_params.py
+++ b/src/mesa/main/get_hash_params.py
@@ -2,20 +2,20 @@ descriptor=[
 { "apis": ["GL", "GLES", "GLES2", "GL_CORE"], "params": [
   [ "ALPHA_BITS", "BUFFER_INT(Visual.alphaBits), extra_new_buffers" ],
   [ "BLEND", "CONTEXT_BIT0(Color.BlendEnabled), NO_EXTRA" ],
-  [ "BLEND_SRC", "CONTEXT_ENUM(Color.Blend[0].SrcRGB), NO_EXTRA" ],
+  [ "BLEND_SRC", "CONTEXT_ENUM16(Color.Blend[0].SrcRGB), NO_EXTRA" ],
   [ "BLUE_BITS", "BUFFER_INT(Visual.blueBits), extra_new_buffers" ],
   [ "COLOR_CLEAR_VALUE", "LOC_CUSTOM, TYPE_FLOATN_4, 0, extra_new_frag_clamp" ],
   [ "COLOR_WRITEMASK", "LOC_CUSTOM, TYPE_INT_4, 0, NO_EXTRA" ],
   [ "CULL_FACE", "CONTEXT_BOOL(Polygon.CullFlag), NO_EXTRA" ],
-  [ "CULL_FACE_MODE", "CONTEXT_ENUM(Polygon.CullFaceMode), NO_EXTRA" ],
+  [ "CULL_FACE_MODE", "CONTEXT_ENUM16(Polygon.CullFaceMode), NO_EXTRA" ],
   [ "DEPTH_BITS", "BUFFER_INT(Visual.depthBits), extra_new_buffers" ],
   [ "DEPTH_CLEAR_VALUE", "CONTEXT_FIELD(Depth.Clear, TYPE_DOUBLEN), NO_EXTRA" ],
-  [ "DEPTH_FUNC", "CONTEXT_ENUM(Depth.Func), NO_EXTRA" ],
+  [ "DEPTH_FUNC", "CONTEXT_ENUM16(Depth.Func), NO_EXTRA" ],
   [ "DEPTH_RANGE", "LOC_CUSTOM, TYPE_DOUBLEN_2, 0, NO_EXTRA" ],
   [ "DEPTH_TEST", "CONTEXT_BOOL(Depth.Test), NO_EXTRA" ],
   [ "DEPTH_WRITEMASK", "CONTEXT_BOOL(Depth.Mask), NO_EXTRA" ],
   [ "DITHER", "CONTEXT_BOOL(Color.DitherFlag), NO_EXTRA" ],
-  [ "FRONT_FACE", "CONTEXT_ENUM(Polygon.FrontFace), NO_EXTRA" ],
+  [ "FRONT_FACE", "CONTEXT_ENUM16(Polygon.FrontFace), NO_EXTRA" ],
   [ "GREEN_BITS", "BUFFER_INT(Visual.greenBits), extra_new_buffers" ],
   [ "LINE_WIDTH", "CONTEXT_FLOAT(Line.Width), NO_EXTRA" ],
   [ "ALIASED_LINE_WIDTH_RANGE", "CONTEXT_FLOAT2(Const.MinLineWidth), NO_EXTRA" ],
@@ -33,10 +33,10 @@ descriptor=[
   [ "SCISSOR_TEST", "LOC_CUSTOM, TYPE_BOOLEAN, NO_OFFSET, NO_EXTRA" ],
   [ "STENCIL_BITS", "BUFFER_INT(Visual.stencilBits), extra_new_buffers" ],
   [ "STENCIL_CLEAR_VALUE", "CONTEXT_INT(Stencil.Clear), NO_EXTRA" ],
-  [ "STENCIL_FAIL", "LOC_CUSTOM, TYPE_ENUM, NO_OFFSET, NO_EXTRA" ],
-  [ "STENCIL_FUNC", "LOC_CUSTOM, TYPE_ENUM, NO_OFFSET, NO_EXTRA" ],
-  [ "STENCIL_PASS_DEPTH_FAIL", "LOC_CUSTOM, TYPE_ENUM, NO_OFFSET, NO_EXTRA" ],
-  [ "STENCIL_PASS_DEPTH_PASS", "LOC_CUSTOM, TYPE_ENUM, NO_OFFSET, NO_EXTRA" ],
+  [ "STENCIL_FAIL", "LOC_CUSTOM, TYPE_ENUM16, NO_OFFSET, NO_EXTRA" ],
+  [ "STENCIL_FUNC", "LOC_CUSTOM, TYPE_ENUM16, NO_OFFSET, NO_EXTRA" ],
+  [ "STENCIL_PASS_DEPTH_FAIL", "LOC_CUSTOM, TYPE_ENUM16, NO_OFFSET, NO_EXTRA" ],
+  [ "STENCIL_PASS_DEPTH_PASS", "LOC_CUSTOM, TYPE_ENUM16, NO_OFFSET, NO_EXTRA" ],
   [ "STENCIL_REF", "LOC_CUSTOM, TYPE_UINT, NO_OFFSET, NO_EXTRA" ],
   [ "STENCIL_TEST", "CONTEXT_BOOL(Stencil.Enabled), NO_EXTRA" ],
   [ "STENCIL_VALUE_MASK", "LOC_CUSTOM, TYPE_UINT, NO_OFFSET, NO_EXTRA" ],
@@ -61,15 +61,15 @@ descriptor=[
   [ "MAX_CUBE_MAP_TEXTURE_SIZE_ARB", "LOC_CUSTOM, TYPE_INT, offsetof(struct gl_context, Const.MaxCubeTextureLevels), extra_ARB_texture_cube_map" ],
 
 # XXX: OES_blend_subtract
-  [ "BLEND_SRC_RGB", "CONTEXT_ENUM(Color.Blend[0].SrcRGB), NO_EXTRA" ],
-  [ "BLEND_DST_RGB", "CONTEXT_ENUM(Color.Blend[0].DstRGB), NO_EXTRA" ],
-  [ "BLEND_SRC_ALPHA", "CONTEXT_ENUM(Color.Blend[0].SrcA), NO_EXTRA" ],
-  [ "BLEND_DST_ALPHA", "CONTEXT_ENUM(Color.Blend[0].DstA), NO_EXTRA" ],
+  [ "BLEND_SRC_RGB", "CONTEXT_ENUM16(Color.Blend[0].SrcRGB), NO_EXTRA" ],
+  [ "BLEND_DST_RGB", "CONTEXT_ENUM16(Color.Blend[0].DstRGB), NO_EXTRA" ],
+  [ "BLEND_SRC_ALPHA", "CONTEXT_ENUM16(Color.Blend[0].SrcA), NO_EXTRA" ],
+  [ "BLEND_DST_ALPHA", "CONTEXT_ENUM16(Color.Blend[0].DstA), NO_EXTRA" ],
 
 # GL_BLEND_EQUATION_RGB, which is what we're really after, is
 # defined identically to GL_BLEND_EQUATION.
-  [ "BLEND_EQUATION", "CONTEXT_ENUM(Color.Blend[0].EquationRGB), NO_EXTRA" ],
-  [ "BLEND_EQUATION_ALPHA_EXT", "CONTEXT_ENUM(Color.Blend[0].EquationA), NO_EXTRA" ],
+  [ "BLEND_EQUATION", "CONTEXT_ENUM16(Color.Blend[0].EquationRGB), NO_EXTRA" ],
+  [ "BLEND_EQUATION_ALPHA_EXT", "CONTEXT_ENUM16(Color.Blend[0].EquationA), NO_EXTRA" ],
 
 # GL_ARB_texture_compression
   [ "NUM_COMPRESSED_TEXTURE_FORMATS_ARB", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
@@ -88,7 +88,7 @@ descriptor=[
   [ "MIN_SAMPLE_SHADING_VALUE_ARB", "CONTEXT_FLOAT(Multisample.MinSampleShadingValue), extra_gl40_ARB_sample_shading" ],
 
 # GL_SGIS_generate_mipmap
-  [ "GENERATE_MIPMAP_HINT_SGIS", "CONTEXT_ENUM(Hint.GenerateMipmap), NO_EXTRA" ],
+  [ "GENERATE_MIPMAP_HINT_SGIS", "CONTEXT_ENUM16(Hint.GenerateMipmap), NO_EXTRA" ],
 
 # GL_ARB_vertex_buffer_object
   [ "ARRAY_BUFFER_BINDING_ARB", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
@@ -98,9 +98,9 @@ descriptor=[
   [ "ELEMENT_ARRAY_BUFFER_BINDING_ARB", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
 
 # GL_ARB_color_buffer_float
-  [ "CLAMP_VERTEX_COLOR", "CONTEXT_ENUM(Light.ClampVertexColor), extra_ARB_color_buffer_float" ],
-  [ "CLAMP_FRAGMENT_COLOR", "CONTEXT_ENUM(Color.ClampFragmentColor), extra_ARB_color_buffer_float" ],
-  [ "CLAMP_READ_COLOR", "CONTEXT_ENUM(Color.ClampReadColor), extra_ARB_color_buffer_float_or_glcore" ],
+  [ "CLAMP_VERTEX_COLOR", "CONTEXT_ENUM16(Light.ClampVertexColor), extra_ARB_color_buffer_float" ],
+  [ "CLAMP_FRAGMENT_COLOR", "CONTEXT_ENUM16(Color.ClampFragmentColor), extra_ARB_color_buffer_float" ],
+  [ "CLAMP_READ_COLOR", "CONTEXT_ENUM16(Color.ClampReadColor), extra_ARB_color_buffer_float_or_glcore" ],
 
 # GL_ARB_copy_buffer
   [ "COPY_READ_BUFFER", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
@@ -155,9 +155,9 @@ descriptor=[
   [ "LIGHT_MODEL_AMBIENT", "CONTEXT_FIELD(Light.Model.Ambient[0], TYPE_FLOATN_4), NO_EXTRA" ],
   [ "LIGHT_MODEL_TWO_SIDE", "CONTEXT_BOOL(Light.Model.TwoSide), NO_EXTRA" ],
   [ "ALPHA_TEST", "CONTEXT_BOOL(Color.AlphaEnabled), NO_EXTRA" ],
-  [ "ALPHA_TEST_FUNC", "CONTEXT_ENUM(Color.AlphaFunc), NO_EXTRA" ],
+  [ "ALPHA_TEST_FUNC", "CONTEXT_ENUM16(Color.AlphaFunc), NO_EXTRA" ],
   [ "ALPHA_TEST_REF", "LOC_CUSTOM, TYPE_FLOATN, 0, extra_new_frag_clamp" ],
-  [ "BLEND_DST", "CONTEXT_ENUM(Color.Blend[0].DstRGB), NO_EXTRA" ],
+  [ "BLEND_DST", "CONTEXT_ENUM16(Color.Blend[0].DstRGB), NO_EXTRA" ],
   [ "CLIP_DISTANCE0", "CONTEXT_BIT0(Transform.ClipPlanesEnabled), extra_valid_clip_distance" ],
   [ "CLIP_DISTANCE1", "CONTEXT_BIT1(Transform.ClipPlanesEnabled), extra_valid_clip_distance" ],
   [ "CLIP_DISTANCE2", "CONTEXT_BIT2(Transform.ClipPlanesEnabled), extra_valid_clip_distance" ],
@@ -175,15 +175,15 @@ descriptor=[
   [ "FOG_COLOR", "LOC_CUSTOM, TYPE_FLOATN_4, 0, extra_new_frag_clamp" ],
   [ "FOG_DENSITY", "CONTEXT_FLOAT(Fog.Density), NO_EXTRA" ],
   [ "FOG_END", "CONTEXT_FLOAT(Fog.End), NO_EXTRA" ],
-  [ "FOG_HINT", "CONTEXT_ENUM(Hint.Fog), NO_EXTRA" ],
-  [ "FOG_MODE", "CONTEXT_ENUM(Fog.Mode), NO_EXTRA" ],
+  [ "FOG_HINT", "CONTEXT_ENUM16(Hint.Fog), NO_EXTRA" ],
+  [ "FOG_MODE", "CONTEXT_ENUM16(Fog.Mode), NO_EXTRA" ],
   [ "FOG_START", "CONTEXT_FLOAT(Fog.Start), NO_EXTRA" ],
   [ "LINE_SMOOTH", "CONTEXT_BOOL(Line.SmoothFlag), NO_EXTRA" ],
-  [ "LINE_SMOOTH_HINT", "CONTEXT_ENUM(Hint.LineSmooth), NO_EXTRA" ],
+  [ "LINE_SMOOTH_HINT", "CONTEXT_ENUM16(Hint.LineSmooth), NO_EXTRA" ],
   [ "LINE_WIDTH_RANGE", "CONTEXT_FLOAT2(Const.MinLineWidthAA), NO_EXTRA" ],
   [ "COLOR_LOGIC_OP", "CONTEXT_BOOL(Color.ColorLogicOpEnabled), NO_EXTRA" ],
-  [ "LOGIC_OP_MODE", "CONTEXT_ENUM(Color.LogicOp), NO_EXTRA" ],
-  [ "MATRIX_MODE", "CONTEXT_ENUM(Transform.MatrixMode), NO_EXTRA" ],
+  [ "LOGIC_OP_MODE", "CONTEXT_ENUM16(Color.LogicOp), NO_EXTRA" ],
+  [ "MATRIX_MODE", "CONTEXT_ENUM16(Transform.MatrixMode), NO_EXTRA" ],
   [ "MAX_MODELVIEW_STACK_DEPTH", "CONST(MAX_MODELVIEW_STACK_DEPTH), NO_EXTRA" ],
   [ "MAX_PROJECTION_STACK_DEPTH", "CONST(MAX_PROJECTION_STACK_DEPTH), NO_EXTRA" ],
   [ "MAX_TEXTURE_STACK_DEPTH", "CONST(MAX_TEXTURE_STACK_DEPTH), NO_EXTRA" ],
@@ -191,35 +191,35 @@ descriptor=[
   [ "MODELVIEW_STACK_DEPTH", "LOC_CUSTOM, TYPE_INT, offsetof(struct gl_context, ModelviewMatrixStack.Depth), NO_EXTRA" ],
   [ "NORMALIZE", "CONTEXT_BOOL(Transform.Normalize), NO_EXTRA" ],
   [ "PACK_SKIP_IMAGES", "CONTEXT_INT(Pack.SkipImages), NO_EXTRA" ],
-  [ "PERSPECTIVE_CORRECTION_HINT", "CONTEXT_ENUM(Hint.PerspectiveCorrection), NO_EXTRA" ],
+  [ "PERSPECTIVE_CORRECTION_HINT", "CONTEXT_ENUM16(Hint.PerspectiveCorrection), NO_EXTRA" ],
   [ "POINT_SIZE", "CONTEXT_FLOAT(Point.Size), NO_EXTRA" ],
   [ "POINT_SIZE_RANGE", "CONTEXT_FLOAT2(Const.MinPointSizeAA), NO_EXTRA" ],
   [ "POINT_SMOOTH", "CONTEXT_BOOL(Point.SmoothFlag), NO_EXTRA" ],
-  [ "POINT_SMOOTH_HINT", "CONTEXT_ENUM(Hint.PointSmooth), NO_EXTRA" ],
+  [ "POINT_SMOOTH_HINT", "CONTEXT_ENUM16(Hint.PointSmooth), NO_EXTRA" ],
   [ "POINT_SIZE_MIN_EXT", "CONTEXT_FLOAT(Point.MinSize), NO_EXTRA" ],
   [ "POINT_SIZE_MAX_EXT", "CONTEXT_FLOAT(Point.MaxSize), NO_EXTRA" ],
   [ "POINT_FADE_THRESHOLD_SIZE_EXT", "CONTEXT_FLOAT(Point.Threshold), NO_EXTRA" ],
   [ "PROJECTION_MATRIX", "CONTEXT_MATRIX(ProjectionMatrixStack.Top), NO_EXTRA" ],
   [ "PROJECTION_STACK_DEPTH", "LOC_CUSTOM, TYPE_INT, offsetof(struct gl_context, ProjectionMatrixStack.Depth), NO_EXTRA" ],
   [ "RESCALE_NORMAL", "CONTEXT_BOOL(Transform.RescaleNormals), NO_EXTRA" ],
-  [ "SHADE_MODEL", "CONTEXT_ENUM(Light.ShadeModel), NO_EXTRA" ],
+  [ "SHADE_MODEL", "CONTEXT_ENUM16(Light.ShadeModel), NO_EXTRA" ],
   [ "TEXTURE_2D", "LOC_CUSTOM, TYPE_BOOLEAN, 0, NO_EXTRA" ],
   [ "TEXTURE_MATRIX", "LOC_CUSTOM, TYPE_MATRIX, 0, extra_valid_texture_unit" ],
   [ "TEXTURE_STACK_DEPTH", "LOC_CUSTOM, TYPE_INT, 0, extra_valid_texture_unit" ],
   [ "VERTEX_ARRAY", "ARRAY_BOOL(VertexAttrib[VERT_ATTRIB_POS].Enabled), NO_EXTRA" ],
   [ "VERTEX_ARRAY_SIZE", "ARRAY_INT(VertexAttrib[VERT_ATTRIB_POS].Size), NO_EXTRA" ],
-  [ "VERTEX_ARRAY_TYPE", "ARRAY_ENUM(VertexAttrib[VERT_ATTRIB_POS].Type), NO_EXTRA" ],
+  [ "VERTEX_ARRAY_TYPE", "ARRAY_ENUM16(VertexAttrib[VERT_ATTRIB_POS].Type), NO_EXTRA" ],
   [ "VERTEX_ARRAY_STRIDE", "ARRAY_INT(VertexAttrib[VERT_ATTRIB_POS].Stride), NO_EXTRA" ],
   [ "NORMAL_ARRAY", "ARRAY_BOOL(VertexAttrib[VERT_ATTRIB_NORMAL].Enabled), NO_EXTRA" ],
-  [ "NORMAL_ARRAY_TYPE", "ARRAY_ENUM(VertexAttrib[VERT_ATTRIB_NORMAL].Type), NO_EXTRA" ],
+  [ "NORMAL_ARRAY_TYPE", "ARRAY_ENUM16(VertexAttrib[VERT_ATTRIB_NORMAL].Type), NO_EXTRA" ],
   [ "NORMAL_ARRAY_STRIDE", "ARRAY_INT(VertexAttrib[VERT_ATTRIB_NORMAL].Stride), NO_EXTRA" ],
   [ "COLOR_ARRAY", "ARRAY_BOOL(VertexAttrib[VERT_ATTRIB_COLOR0].Enabled), NO_EXTRA" ],
   [ "COLOR_ARRAY_SIZE", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
-  [ "COLOR_ARRAY_TYPE", "ARRAY_ENUM(VertexAttrib[VERT_ATTRIB_COLOR0].Type), NO_EXTRA" ],
+  [ "COLOR_ARRAY_TYPE", "ARRAY_ENUM16(VertexAttrib[VERT_ATTRIB_COLOR0].Type), NO_EXTRA" ],
   [ "COLOR_ARRAY_STRIDE", "ARRAY_INT(VertexAttrib[VERT_ATTRIB_COLOR0].Stride), NO_EXTRA" ],
   [ "TEXTURE_COORD_ARRAY", "LOC_CUSTOM, TYPE_BOOLEAN, offsetof(struct gl_array_attributes, Enabled), NO_EXTRA" ],
   [ "TEXTURE_COORD_ARRAY_SIZE", "LOC_CUSTOM, TYPE_INT, offsetof(struct gl_array_attributes, Size), NO_EXTRA" ],
-  [ "TEXTURE_COORD_ARRAY_TYPE", "LOC_CUSTOM, TYPE_ENUM, offsetof(struct gl_array_attributes, Type), NO_EXTRA" ],
+  [ "TEXTURE_COORD_ARRAY_TYPE", "LOC_CUSTOM, TYPE_ENUM16, offsetof(struct gl_array_attributes, Type), NO_EXTRA" ],
   [ "TEXTURE_COORD_ARRAY_STRIDE", "LOC_CUSTOM, TYPE_INT, offsetof(struct gl_array_attributes, Stride), NO_EXTRA" ],
 
 # GL_ARB_multitexture
@@ -249,7 +249,7 @@ descriptor=[
 { "apis": ["GLES"], "params": [
 # OES_point_size_array
   [ "POINT_SIZE_ARRAY_OES", "ARRAY_FIELD(VertexAttrib[VERT_ATTRIB_POINT_SIZE].Enabled, TYPE_BOOLEAN), NO_EXTRA" ],
-  [ "POINT_SIZE_ARRAY_TYPE_OES", "ARRAY_FIELD(VertexAttrib[VERT_ATTRIB_POINT_SIZE].Type, TYPE_ENUM), NO_EXTRA" ],
+  [ "POINT_SIZE_ARRAY_TYPE_OES", "ARRAY_FIELD(VertexAttrib[VERT_ATTRIB_POINT_SIZE].Type, TYPE_ENUM16), NO_EXTRA" ],
   [ "POINT_SIZE_ARRAY_STRIDE_OES", "ARRAY_FIELD(VertexAttrib[VERT_ATTRIB_POINT_SIZE].Stride, TYPE_INT), NO_EXTRA" ],
   [ "POINT_SIZE_ARRAY_BUFFER_BINDING_OES", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
 ]},
@@ -279,14 +279,14 @@ descriptor=[
   [ "MAX_COLOR_ATTACHMENTS", "CONTEXT_INT(Const.MaxColorAttachments), NO_EXTRA" ],
 
 # GL_ARB_draw_buffers / GL_NV_draw_buffers (for ES 2.0)
-  [ "DRAW_BUFFER0_ARB", "BUFFER_ENUM(ColorDrawBuffer[0]), NO_EXTRA" ],
-  [ "DRAW_BUFFER1_ARB", "BUFFER_ENUM(ColorDrawBuffer[1]), extra_valid_draw_buffer" ],
-  [ "DRAW_BUFFER2_ARB", "BUFFER_ENUM(ColorDrawBuffer[2]), extra_valid_draw_buffer" ],
-  [ "DRAW_BUFFER3_ARB", "BUFFER_ENUM(ColorDrawBuffer[3]), extra_valid_draw_buffer" ],
-  [ "DRAW_BUFFER4_ARB", "BUFFER_ENUM(ColorDrawBuffer[4]), extra_valid_draw_buffer" ],
-  [ "DRAW_BUFFER5_ARB", "BUFFER_ENUM(ColorDrawBuffer[5]), extra_valid_draw_buffer" ],
-  [ "DRAW_BUFFER6_ARB", "BUFFER_ENUM(ColorDrawBuffer[6]), extra_valid_draw_buffer" ],
-  [ "DRAW_BUFFER7_ARB", "BUFFER_ENUM(ColorDrawBuffer[7]), extra_valid_draw_buffer" ],
+  [ "DRAW_BUFFER0_ARB", "BUFFER_ENUM16(ColorDrawBuffer[0]), NO_EXTRA" ],
+  [ "DRAW_BUFFER1_ARB", "BUFFER_ENUM16(ColorDrawBuffer[1]), extra_valid_draw_buffer" ],
+  [ "DRAW_BUFFER2_ARB", "BUFFER_ENUM16(ColorDrawBuffer[2]), extra_valid_draw_buffer" ],
+  [ "DRAW_BUFFER3_ARB", "BUFFER_ENUM16(ColorDrawBuffer[3]), extra_valid_draw_buffer" ],
+  [ "DRAW_BUFFER4_ARB", "BUFFER_ENUM16(ColorDrawBuffer[4]), extra_valid_draw_buffer" ],
+  [ "DRAW_BUFFER5_ARB", "BUFFER_ENUM16(ColorDrawBuffer[5]), extra_valid_draw_buffer" ],
+  [ "DRAW_BUFFER6_ARB", "BUFFER_ENUM16(ColorDrawBuffer[6]), extra_valid_draw_buffer" ],
+  [ "DRAW_BUFFER7_ARB", "BUFFER_ENUM16(ColorDrawBuffer[7]), extra_valid_draw_buffer" ],
   [ "BLEND_COLOR_EXT", "LOC_CUSTOM, TYPE_FLOATN_4, 0, extra_new_frag_clamp" ],
 
 # GL_ARB_fragment_program
@@ -301,13 +301,13 @@ descriptor=[
   [ "CURRENT_PROGRAM", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
 
 # OpenGL 2.0
-  [ "STENCIL_BACK_FUNC", "CONTEXT_ENUM(Stencil.Function[1]), NO_EXTRA" ],
+  [ "STENCIL_BACK_FUNC", "CONTEXT_ENUM16(Stencil.Function[1]), NO_EXTRA" ],
   [ "STENCIL_BACK_VALUE_MASK", "CONTEXT_UINT(Stencil.ValueMask[1]), NO_EXTRA" ],
   [ "STENCIL_BACK_WRITEMASK", "CONTEXT_UINT(Stencil.WriteMask[1]), NO_EXTRA" ],
   [ "STENCIL_BACK_REF", "LOC_CUSTOM, TYPE_UINT, NO_OFFSET, NO_EXTRA" ],
-  [ "STENCIL_BACK_FAIL", "CONTEXT_ENUM(Stencil.FailFunc[1]), NO_EXTRA" ],
-  [ "STENCIL_BACK_PASS_DEPTH_FAIL", "CONTEXT_ENUM(Stencil.ZFailFunc[1]), NO_EXTRA" ],
-  [ "STENCIL_BACK_PASS_DEPTH_PASS", "CONTEXT_ENUM(Stencil.ZPassFunc[1]), NO_EXTRA" ],
+  [ "STENCIL_BACK_FAIL", "CONTEXT_ENUM16(Stencil.FailFunc[1]), NO_EXTRA" ],
+  [ "STENCIL_BACK_PASS_DEPTH_FAIL", "CONTEXT_ENUM16(Stencil.ZFailFunc[1]), NO_EXTRA" ],
+  [ "STENCIL_BACK_PASS_DEPTH_PASS", "CONTEXT_ENUM16(Stencil.ZPassFunc[1]), NO_EXTRA" ],
   [ "MAX_VERTEX_ATTRIBS_ARB", "CONTEXT_INT(Const.Program[MESA_SHADER_VERTEX].MaxAttribs), extra_ARB_vertex_program_api_es2" ],
 
 # OES_texture_3D
@@ -315,10 +315,10 @@ descriptor=[
   [ "MAX_3D_TEXTURE_SIZE", "LOC_CUSTOM, TYPE_INT, offsetof(struct gl_context, Const.Max3DTextureLevels), NO_EXTRA" ],
 
 # GL_ARB_fragment_program/OES_standard_derivatives
-  [ "FRAGMENT_SHADER_DERIVATIVE_HINT", "CONTEXT_ENUM(Hint.FragmentShaderDerivative), extra_ARB_fragment_shader" ],
+  [ "FRAGMENT_SHADER_DERIVATIVE_HINT", "CONTEXT_ENUM16(Hint.FragmentShaderDerivative), extra_ARB_fragment_shader" ],
 
 # GL_NV_read_buffer
-  [ "READ_BUFFER", "LOC_CUSTOM, TYPE_ENUM, NO_OFFSET, extra_NV_read_buffer_api_gl" ],
+  [ "READ_BUFFER", "LOC_CUSTOM, TYPE_ENUM16, NO_OFFSET, extra_NV_read_buffer_api_gl" ],
 
 # GL_ARB_ES2_compatibility
   [ "SHADER_COMPILER", "CONST(1), extra_ARB_ES2_compatibility_api_es2" ],
@@ -339,7 +339,7 @@ descriptor=[
   [ "PERFQUERY_GPA_EXTENDED_COUNTERS_INTEL", "CONST(PERFQUERY_HAVE_GPA_EXTENDED_COUNTERS), extra_INTEL_performance_query" ],
 
 # GL_KHR_context_flush_control
-  [ "CONTEXT_RELEASE_BEHAVIOR", "CONTEXT_ENUM(Const.ContextReleaseBehavior), NO_EXTRA" ],
+  [ "CONTEXT_RELEASE_BEHAVIOR", "CONTEXT_ENUM16(Const.ContextReleaseBehavior), NO_EXTRA" ],
 
 # blend_func_extended
   [ "MAX_DUAL_SOURCE_DRAW_BUFFERS", "CONTEXT_INT(Const.MaxDualSourceDrawBuffers), extra_ARB_blend_func_extended" ],
@@ -348,8 +348,8 @@ descriptor=[
   [ "BLEND_ADVANCED_COHERENT_KHR", "CONTEXT_BOOL(Color.BlendCoherent), extra_KHR_blend_equation_advanced_coherent" ],
 
 # GL_ARB_robustness / GL_KHR_robustness
-  [ "CONTEXT_ROBUST_ACCESS", "CONTEXT_ENUM(Const.RobustAccess), extra_KHR_robustness" ],
-  [ "RESET_NOTIFICATION_STRATEGY_ARB", "CONTEXT_ENUM(Const.ResetStrategy), extra_KHR_robustness_or_GL" ],
+  [ "CONTEXT_ROBUST_ACCESS", "CONTEXT_ENUM16(Const.RobustAccess), extra_KHR_robustness" ],
+  [ "RESET_NOTIFICATION_STRATEGY_ARB", "CONTEXT_ENUM16(Const.ResetStrategy), extra_KHR_robustness_or_GL" ],
 ]},
 
 # GLES3 is not a typo.
@@ -432,7 +432,7 @@ descriptor=[
 # GL_EXT_window_rectangles
   [ "MAX_WINDOW_RECTANGLES_EXT", "CONTEXT_INT(Const.MaxWindowRectangles), extra_EXT_window_rectangles" ],
   [ "NUM_WINDOW_RECTANGLES_EXT", "CONTEXT_INT(Scissor.NumWindowRects), extra_EXT_window_rectangles" ],
-  [ "WINDOW_RECTANGLE_MODE_EXT", "CONTEXT_ENUM(Scissor.WindowRectMode), extra_EXT_window_rectangles" ],
+  [ "WINDOW_RECTANGLE_MODE_EXT", "CONTEXT_ENUM16(Scissor.WindowRectMode), extra_EXT_window_rectangles" ],
 ]},
 
 { "apis": ["GLES", "GLES2"], "params": [
@@ -516,11 +516,11 @@ descriptor=[
   [ "PROGRAM_PIPELINE_BINDING", "LOC_CUSTOM, TYPE_INT, GL_PROGRAM_PIPELINE_BINDING, NO_EXTRA" ],
 
 # GL_ARB_vertex_attrib_binding / GLES 3.1
-  [ "MAX_VERTEX_ATTRIB_RELATIVE_OFFSET", "CONTEXT_ENUM(Const.MaxVertexAttribRelativeOffset), NO_EXTRA" ],
-  [ "MAX_VERTEX_ATTRIB_BINDINGS", "CONTEXT_ENUM(Const.MaxVertexAttribBindings), NO_EXTRA" ],
+  [ "MAX_VERTEX_ATTRIB_RELATIVE_OFFSET", "CONTEXT_ENUM16(Const.MaxVertexAttribRelativeOffset), NO_EXTRA" ],
+  [ "MAX_VERTEX_ATTRIB_BINDINGS", "CONTEXT_ENUM16(Const.MaxVertexAttribBindings), NO_EXTRA" ],
 
 # GL 4.4 / GLES 3.1
-  [ "MAX_VERTEX_ATTRIB_STRIDE", "CONTEXT_ENUM(Const.MaxVertexAttribStride), NO_EXTRA" ],
+  [ "MAX_VERTEX_ATTRIB_STRIDE", "CONTEXT_ENUM16(Const.MaxVertexAttribStride), NO_EXTRA" ],
 
   # GL_ARB_shader_storage_buffer_object / GLES 3.1
   [ "MAX_VERTEX_SHADER_STORAGE_BLOCKS", "CONTEXT_INT(Const.Program[MESA_SHADER_VERTEX].MaxShaderStorageBlocks), extra_ARB_shader_storage_buffer_object_es31" ],
@@ -612,7 +612,7 @@ descriptor=[
   [ "MAX_COMBINED_GEOMETRY_UNIFORM_COMPONENTS", "CONTEXT_INT(Const.Program[MESA_SHADER_GEOMETRY].MaxCombinedUniformComponents), extra_ARB_uniform_buffer_object_and_geometry_shader" ],
 
 # GL_ARB_viewport_array / GL_OES_geometry_shader
-  [ "LAYER_PROVOKING_VERTEX", "CONTEXT_ENUM(Const.LayerAndVPIndexProvokingVertex), extra_ARB_viewport_array_or_oes_geometry_shader" ],
+  [ "LAYER_PROVOKING_VERTEX", "CONTEXT_ENUM16(Const.LayerAndVPIndexProvokingVertex), extra_ARB_viewport_array_or_oes_geometry_shader" ],
 
 # GL_ARB_gpu_shader5 / GL_OES_geometry_shader
   [ "MAX_GEOMETRY_SHADER_INVOCATIONS", "CONST(MAX_GEOMETRY_SHADER_INVOCATIONS), extra_ARB_gpu_shader5_or_oes_geometry_shader" ],
@@ -624,7 +624,7 @@ descriptor=[
   [ "MAX_VIEWPORTS", "CONTEXT_INT(Const.MaxViewports), extra_ARB_viewport_array_or_oes_viewport_array" ],
   [ "VIEWPORT_SUBPIXEL_BITS", "CONTEXT_INT(Const.ViewportSubpixelBits), extra_ARB_viewport_array_or_oes_viewport_array" ],
   [ "VIEWPORT_BOUNDS_RANGE", "CONTEXT_FLOAT2(Const.ViewportBounds), extra_ARB_viewport_array_or_oes_viewport_array" ],
-  [ "VIEWPORT_INDEX_PROVOKING_VERTEX", "CONTEXT_ENUM(Const.LayerAndVPIndexProvokingVertex), extra_ARB_viewport_array_or_oes_viewport_array" ],
+  [ "VIEWPORT_INDEX_PROVOKING_VERTEX", "CONTEXT_ENUM16(Const.LayerAndVPIndexProvokingVertex), extra_ARB_viewport_array_or_oes_viewport_array" ],
 
 # INTEL_conservative_rasterization
   [ "CONSERVATIVE_RASTERIZATION_INTEL", "CONTEXT_BOOL(IntelConservativeRasterization), extra_INTEL_conservative_rasterization" ],
@@ -654,11 +654,11 @@ descriptor=[
   [ "AUX_BUFFERS", "BUFFER_INT(Visual.numAuxBuffers), NO_EXTRA" ],
   [ "BLUE_BIAS", "CONTEXT_FLOAT(Pixel.BlueBias), NO_EXTRA" ],
   [ "BLUE_SCALE", "CONTEXT_FLOAT(Pixel.BlueScale), NO_EXTRA" ],
-  [ "CLIP_DEPTH_MODE", "CONTEXT_ENUM(Transform.ClipDepthMode), extra_ARB_clip_control" ],
-  [ "CLIP_ORIGIN", "CONTEXT_ENUM(Transform.ClipOrigin), extra_ARB_clip_control" ],
+  [ "CLIP_DEPTH_MODE", "CONTEXT_ENUM16(Transform.ClipDepthMode), extra_ARB_clip_control" ],
+  [ "CLIP_ORIGIN", "CONTEXT_ENUM16(Transform.ClipOrigin), extra_ARB_clip_control" ],
   [ "CLIENT_ATTRIB_STACK_DEPTH", "CONTEXT_INT(ClientAttribStackDepth), NO_EXTRA" ],
-  [ "COLOR_MATERIAL_FACE", "CONTEXT_ENUM(Light.ColorMaterialFace), NO_EXTRA" ],
-  [ "COLOR_MATERIAL_PARAMETER", "CONTEXT_ENUM(Light.ColorMaterialMode), NO_EXTRA" ],
+  [ "COLOR_MATERIAL_FACE", "CONTEXT_ENUM16(Light.ColorMaterialFace), NO_EXTRA" ],
+  [ "COLOR_MATERIAL_PARAMETER", "CONTEXT_ENUM16(Light.ColorMaterialMode), NO_EXTRA" ],
   [ "CURRENT_INDEX", "CONTEXT_FLOAT(Current.Attrib[VERT_ATTRIB_COLOR_INDEX][0]), extra_flush_current" ],
   [ "CURRENT_RASTER_COLOR", "CONTEXT_FIELD(Current.RasterColor[0], TYPE_FLOATN_4), NO_EXTRA" ],
   [ "CURRENT_RASTER_DISTANCE", "CONTEXT_FLOAT(Current.RasterDistance), NO_EXTRA" ],
@@ -670,10 +670,10 @@ descriptor=[
   [ "DEPTH_BIAS", "CONTEXT_FLOAT(Pixel.DepthBias), NO_EXTRA" ],
   [ "DEPTH_SCALE", "CONTEXT_FLOAT(Pixel.DepthScale), NO_EXTRA" ],
   [ "DOUBLEBUFFER", "BUFFER_INT(Visual.doubleBufferMode), NO_EXTRA" ],
-  [ "DRAW_BUFFER", "BUFFER_ENUM(ColorDrawBuffer[0]), NO_EXTRA" ],
+  [ "DRAW_BUFFER", "BUFFER_ENUM16(ColorDrawBuffer[0]), NO_EXTRA" ],
   [ "EDGE_FLAG", "LOC_CUSTOM, TYPE_BOOLEAN, 0, extra_flush_current" ],
   [ "FEEDBACK_BUFFER_SIZE", "CONTEXT_INT(Feedback.BufferSize), NO_EXTRA" ],
-  [ "FEEDBACK_BUFFER_TYPE", "CONTEXT_ENUM(Feedback.Type), NO_EXTRA" ],
+  [ "FEEDBACK_BUFFER_TYPE", "CONTEXT_ENUM16(Feedback.Type), NO_EXTRA" ],
   [ "FOG_INDEX", "CONTEXT_FLOAT(Fog.Index), NO_EXTRA" ],
   [ "GREEN_BIAS", "CONTEXT_FLOAT(Pixel.GreenBias), NO_EXTRA" ],
   [ "GREEN_SCALE", "CONTEXT_FLOAT(Pixel.GreenScale), NO_EXTRA" ],
@@ -683,7 +683,7 @@ descriptor=[
   [ "INDEX_OFFSET", "CONTEXT_INT(Pixel.IndexOffset), NO_EXTRA" ],
   [ "INDEX_SHIFT", "CONTEXT_INT(Pixel.IndexShift), NO_EXTRA" ],
   [ "INDEX_WRITEMASK", "CONTEXT_INT(Color.IndexMask), NO_EXTRA" ],
-  [ "LIGHT_MODEL_COLOR_CONTROL", "CONTEXT_ENUM(Light.Model.ColorControl), NO_EXTRA" ],
+  [ "LIGHT_MODEL_COLOR_CONTROL", "CONTEXT_ENUM16(Light.Model.ColorControl), NO_EXTRA" ],
   [ "LIGHT_MODEL_LOCAL_VIEWER", "CONTEXT_BOOL(Light.Model.LocalViewer), NO_EXTRA" ],
   [ "LINE_STIPPLE", "CONTEXT_BOOL(Line.StippleFlag), NO_EXTRA" ],
   [ "LINE_STIPPLE_PATTERN", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
@@ -691,7 +691,7 @@ descriptor=[
   [ "LINE_WIDTH_GRANULARITY", "CONTEXT_FLOAT(Const.LineWidthGranularity), NO_EXTRA" ],
   [ "LIST_BASE", "CONTEXT_INT(List.ListBase), NO_EXTRA" ],
   [ "LIST_INDEX", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
-  [ "LIST_MODE", "LOC_CUSTOM, TYPE_ENUM, 0, NO_EXTRA" ],
+  [ "LIST_MODE", "LOC_CUSTOM, TYPE_ENUM16, 0, NO_EXTRA" ],
   [ "INDEX_LOGIC_OP", "CONTEXT_BOOL(Color.IndexLogicOpEnabled), NO_EXTRA" ],
   [ "MAP1_COLOR_4", "CONTEXT_BOOL(Eval.Map1Color4), NO_EXTRA" ],
   [ "MAP1_GRID_DOMAIN", "CONTEXT_FLOAT2(Eval.MapGrid1u1), NO_EXTRA" ],
@@ -738,16 +738,16 @@ descriptor=[
   [ "PIXEL_MAP_R_TO_R_SIZE", "CONTEXT_INT(PixelMaps.RtoR.Size), NO_EXTRA" ],
   [ "PIXEL_MAP_S_TO_S_SIZE", "CONTEXT_INT(PixelMaps.StoS.Size), NO_EXTRA" ],
   [ "POINT_SIZE_GRANULARITY", "CONTEXT_FLOAT(Const.PointSizeGranularity), NO_EXTRA" ],
-  [ "POLYGON_MODE", "CONTEXT_ENUM2(Polygon.FrontMode), NO_EXTRA" ],
+  [ "POLYGON_MODE", "CONTEXT_ENUM16(Polygon.FrontMode), NO_EXTRA" ],
   [ "POLYGON_OFFSET_BIAS_EXT", "CONTEXT_FLOAT(Polygon.OffsetUnits), NO_EXTRA" ],
   [ "POLYGON_OFFSET_POINT", "CONTEXT_BOOL(Polygon.OffsetPoint), NO_EXTRA" ],
   [ "POLYGON_OFFSET_LINE", "CONTEXT_BOOL(Polygon.OffsetLine), NO_EXTRA" ],
   [ "POLYGON_SMOOTH", "CONTEXT_BOOL(Polygon.SmoothFlag), NO_EXTRA" ],
-  [ "POLYGON_SMOOTH_HINT", "CONTEXT_ENUM(Hint.PolygonSmooth), NO_EXTRA" ],
+  [ "POLYGON_SMOOTH_HINT", "CONTEXT_ENUM16(Hint.PolygonSmooth), NO_EXTRA" ],
   [ "POLYGON_STIPPLE", "CONTEXT_BOOL(Polygon.StippleFlag), NO_EXTRA" ],
   [ "RED_BIAS", "CONTEXT_FLOAT(Pixel.RedBias), NO_EXTRA" ],
   [ "RED_SCALE", "CONTEXT_FLOAT(Pixel.RedScale), NO_EXTRA" ],
-  [ "RENDER_MODE", "CONTEXT_ENUM(RenderMode), NO_EXTRA" ],
+  [ "RENDER_MODE", "CONTEXT_ENUM16(RenderMode), NO_EXTRA" ],
   [ "RGBA_MODE", "CONST(1), NO_EXTRA" ],
   [ "SELECTION_BUFFER_SIZE", "CONTEXT_INT(Select.BufferSize), NO_EXTRA" ],
   [ "STEREO", "BUFFER_INT(Visual.stereoMode), NO_EXTRA" ],
@@ -769,7 +769,7 @@ descriptor=[
   [ "NORMAL_ARRAY_COUNT_EXT", "CONST(0), NO_EXTRA" ],
   [ "COLOR_ARRAY_COUNT_EXT", "CONST(0), NO_EXTRA" ],
   [ "INDEX_ARRAY", "ARRAY_BOOL(VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled), NO_EXTRA" ],
-  [ "INDEX_ARRAY_TYPE", "ARRAY_ENUM(VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Type), NO_EXTRA" ],
+  [ "INDEX_ARRAY_TYPE", "ARRAY_ENUM16(VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Type), NO_EXTRA" ],
   [ "INDEX_ARRAY_STRIDE", "ARRAY_INT(VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Stride), NO_EXTRA" ],
   [ "INDEX_ARRAY_COUNT_EXT", "CONST(0), NO_EXTRA" ],
   [ "TEXTURE_COORD_ARRAY_COUNT_EXT", "CONST(0), NO_EXTRA" ],
@@ -803,26 +803,26 @@ descriptor=[
   [ "COLOR_SUM", "CONTEXT_BOOL(Fog.ColorSumEnabled), NO_EXTRA" ],
   [ "CURRENT_SECONDARY_COLOR", "CONTEXT_FIELD(Current.Attrib[VERT_ATTRIB_COLOR1][0], TYPE_FLOATN_4), extra_flush_current" ],
   [ "SECONDARY_COLOR_ARRAY", "ARRAY_BOOL(VertexAttrib[VERT_ATTRIB_COLOR1].Enabled), NO_EXTRA" ],
-  [ "SECONDARY_COLOR_ARRAY_TYPE", "ARRAY_ENUM(VertexAttrib[VERT_ATTRIB_COLOR1].Type), NO_EXTRA" ],
+  [ "SECONDARY_COLOR_ARRAY_TYPE", "ARRAY_ENUM16(VertexAttrib[VERT_ATTRIB_COLOR1].Type), NO_EXTRA" ],
   [ "SECONDARY_COLOR_ARRAY_STRIDE", "ARRAY_INT(VertexAttrib[VERT_ATTRIB_COLOR1].Stride), NO_EXTRA" ],
   [ "SECONDARY_COLOR_ARRAY_SIZE", "LOC_CUSTOM, TYPE_INT, 0, NO_EXTRA" ],
 
 # GL_EXT_fog_coord
   [ "CURRENT_FOG_COORDINATE", "CONTEXT_FLOAT(Current.Attrib[VERT_ATTRIB_FOG][0]), extra_flush_current" ],
   [ "FOG_COORDINATE_ARRAY", "ARRAY_BOOL(VertexAttrib[VERT_ATTRIB_FOG].Enabled), NO_EXTRA" ],
-  [ "FOG_COORDINATE_ARRAY_TYPE", "ARRAY_ENUM(VertexAttrib[VERT_ATTRIB_FOG].Type), NO_EXTRA" ],
+  [ "FOG_COORDINATE_ARRAY_TYPE", "ARRAY_ENUM16(VertexAttrib[VERT_ATTRIB_FOG].Type), NO_EXTRA" ],
   [ "FOG_COORDINATE_ARRAY_STRIDE", "ARRAY_INT(VertexAttrib[VERT_ATTRIB_FOG].Stride), NO_EXTRA" ],
-  [ "FOG_COORDINATE_SOURCE", "CONTEXT_ENUM(Fog.FogCoordinateSource), NO_EXTRA" ],
+  [ "FOG_COORDINATE_SOURCE", "CONTEXT_ENUM16(Fog.FogCoordinateSource), NO_EXTRA" ],
 
 # GL_NV_fog_distance
-  [ "FOG_DISTANCE_MODE_NV", "CONTEXT_ENUM(Fog.FogDistanceMode), extra_NV_fog_distance" ],
+  [ "FOG_DISTANCE_MODE_NV", "CONTEXT_ENUM16(Fog.FogDistanceMode), extra_NV_fog_distance" ],
 
 # GL_IBM_rasterpos_clip
   [ "RASTER_POSITION_UNCLIPPED_IBM", "CONTEXT_BOOL(Transform.RasterPositionUnclipped), NO_EXTRA" ],
 
 # GL_NV_point_sprite
-  [ "POINT_SPRITE_R_MODE_NV", "CONTEXT_ENUM(Point.SpriteRMode), extra_NV_point_sprite" ],
-  [ "POINT_SPRITE_COORD_ORIGIN", "CONTEXT_ENUM(Point.SpriteOrigin), extra_NV_point_sprite_ARB_point_sprite" ],
+  [ "POINT_SPRITE_R_MODE_NV", "CONTEXT_ENUM16(Point.SpriteRMode), extra_NV_point_sprite" ],
+  [ "POINT_SPRITE_COORD_ORIGIN", "CONTEXT_ENUM16(Point.SpriteOrigin), extra_NV_point_sprite_ARB_point_sprite" ],
 
 # GL_NV_texture_rectangle
   [ "TEXTURE_RECTANGLE_NV", "LOC_CUSTOM, TYPE_BOOLEAN, 0, extra_NV_texture_rectangle" ],
@@ -831,7 +831,7 @@ descriptor=[
 
 # GL_EXT_stencil_two_side
   [ "STENCIL_TEST_TWO_SIDE_EXT", "CONTEXT_BOOL(Stencil.TestTwoSide), extra_EXT_stencil_two_side" ],
-  [ "ACTIVE_STENCIL_FACE_EXT", "LOC_CUSTOM, TYPE_ENUM, NO_OFFSET, NO_EXTRA" ],
+  [ "ACTIVE_STENCIL_FACE_EXT", "LOC_CUSTOM, TYPE_ENUM16, NO_OFFSET, NO_EXTRA" ],
 
 # GL_NV_light_max_exponent
   [ "MAX_SHININESS_NV", "CONTEXT_FLOAT(Const.MaxShininess), NO_EXTRA" ],
@@ -892,7 +892,7 @@ descriptor=[
   [ "NUM_INPUT_INTERPOLATOR_COMPONENTS_ATI", "CONST(3), extra_ATI_fragment_shader" ],
 
 # GL_EXT_provoking_vertex
-  [ "PROVOKING_VERTEX_EXT", "CONTEXT_ENUM(Light.ProvokingVertex), extra_EXT_provoking_vertex" ],
+  [ "PROVOKING_VERTEX_EXT", "CONTEXT_ENUM16(Light.ProvokingVertex), extra_EXT_provoking_vertex" ],
   [ "QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION_EXT", "CONTEXT_BOOL(Const.QuadsFollowProvokingVertexConvention), extra_EXT_provoking_vertex_32" ],
 
 # GL_ARB_seamless_cube_map
diff --git a/src/mesa/main/glheader.h b/src/mesa/main/glheader.h
index 35a442a77be..7a4b4a08d3a 100644
--- a/src/mesa/main/glheader.h
+++ b/src/mesa/main/glheader.h
@@ -43,6 +43,7 @@ extern "C" {
 #endif
 
 
+typedef unsigned short GLenum16; /* custom Mesa type to save space */
 typedef int GLclampx;
 
 
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 9cd32c3aaa5..b0eeeafbcda 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -388,7 +388,7 @@ struct gl_lightmodel
    GLfloat Ambient[4];		/**< ambient color */
    GLboolean LocalViewer;	/**< Local (or infinite) view point? */
    GLboolean TwoSide;		/**< Two (or one) sided lighting? */
-   GLenum ColorControl;		/**< either GL_SINGLE_COLOR
+   GLenum16 ColorControl;	/**< either GL_SINGLE_COLOR
                                      or GL_SEPARATE_SPECULAR_COLOR */
 };
 
@@ -461,14 +461,14 @@ struct gl_colorbuffer_attrib
    GLuint IndexMask;                       /**< Color index write mask */
    GLubyte ColorMask[MAX_DRAW_BUFFERS][4]; /**< Each flag is 0xff or 0x0 */
 
-   GLenum DrawBuffer[MAX_DRAW_BUFFERS];	/**< Which buffer to draw into */
+   GLenum16 DrawBuffer[MAX_DRAW_BUFFERS];  /**< Which buffer to draw into */
 
    /**
     * \name alpha testing
     */
    /*@{*/
    GLboolean AlphaEnabled;		/**< Alpha test enabled flag */
-   GLenum AlphaFunc;			/**< Alpha test function */
+   GLenum16 AlphaFunc;			/**< Alpha test function */
    GLfloat AlphaRefUnclamped;
    GLclampf AlphaRef;			/**< Alpha reference value */
    /*@}*/
@@ -488,12 +488,12 @@ struct gl_colorbuffer_attrib
 
    struct
    {
-      GLenum SrcRGB;             /**< RGB blend source term */
-      GLenum DstRGB;             /**< RGB blend dest term */
-      GLenum SrcA;               /**< Alpha blend source term */
-      GLenum DstA;               /**< Alpha blend dest term */
-      GLenum EquationRGB;        /**< GL_ADD, GL_SUBTRACT, etc. */
-      GLenum EquationA;          /**< GL_ADD, GL_SUBTRACT, etc. */
+      GLenum16 SrcRGB;             /**< RGB blend source term */
+      GLenum16 DstRGB;             /**< RGB blend dest term */
+      GLenum16 SrcA;               /**< Alpha blend source term */
+      GLenum16 DstA;               /**< Alpha blend dest term */
+      GLenum16 EquationRGB;        /**< GL_ADD, GL_SUBTRACT, etc. */
+      GLenum16 EquationA;          /**< GL_ADD, GL_SUBTRACT, etc. */
       /**
        * Set if any blend factor uses SRC1.  Computed at the time blend factors
        * get set.
@@ -524,15 +524,15 @@ struct gl_colorbuffer_attrib
    /*@{*/
    GLboolean IndexLogicOpEnabled;	/**< Color index logic op enabled flag */
    GLboolean ColorLogicOpEnabled;	/**< RGBA logic op enabled flag */
-   GLenum LogicOp;			/**< Logic operator */
+   GLenum16 LogicOp;			/**< Logic operator */
    enum gl_logicop_mode _LogicOp;
    /*@}*/
 
    GLboolean DitherFlag;           /**< Dither enable flag */
 
    GLboolean _ClampFragmentColor;  /** < with GL_FIXED_ONLY_ARB resolved */
-   GLenum ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
-   GLenum ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
+   GLenum16 ClampFragmentColor; /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
+   GLenum16 ClampReadColor;     /**< GL_TRUE, GL_FALSE or GL_FIXED_ONLY_ARB */
 
    GLboolean sRGBEnabled;  /**< Framebuffer sRGB blending/updating requested */
 };
@@ -570,7 +570,7 @@ struct gl_current_attrib
  */
 struct gl_depthbuffer_attrib
 {
-   GLenum Func;			/**< Function for depth buffer compare */
+   GLenum16 Func;		/**< Function for depth buffer compare */
    GLclampd Clear;		/**< Value to clear depth buffer to */
    GLboolean Test;		/**< Depth buffering enabled flag */
    GLboolean Mask;		/**< Depth buffer writable? */
@@ -649,10 +649,10 @@ struct gl_fog_attrib
    GLfloat Start;		/**< Start distance in eye coords */
    GLfloat End;			/**< End distance in eye coords */
    GLfloat Index;		/**< Fog index */
-   GLenum Mode;			/**< Fog mode */
-   GLenum FogCoordinateSource;  /**< GL_EXT_fog_coord */
+   GLenum16 Mode;		/**< Fog mode */
+   GLenum16 FogCoordinateSource;/**< GL_EXT_fog_coord */
    GLfloat _Scale;		/**< (End == Start) ? 1.0 : 1.0 / (End - Start) */
-   GLenum FogDistanceMode;     /**< GL_NV_fog_distance */
+   GLenum16 FogDistanceMode;     /**< GL_NV_fog_distance */
 };
 
 
@@ -663,14 +663,14 @@ struct gl_fog_attrib
  */
 struct gl_hint_attrib
 {
-   GLenum PerspectiveCorrection;
-   GLenum PointSmooth;
-   GLenum LineSmooth;
-   GLenum PolygonSmooth;
-   GLenum Fog;
-   GLenum TextureCompression;   /**< GL_ARB_texture_compression */
-   GLenum GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
-   GLenum FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
+   GLenum16 PerspectiveCorrection;
+   GLenum16 PointSmooth;
+   GLenum16 LineSmooth;
+   GLenum16 PolygonSmooth;
+   GLenum16 Fog;
+   GLenum16 TextureCompression;   /**< GL_ARB_texture_compression */
+   GLenum16 GenerateMipmap;       /**< GL_SGIS_generate_mipmap */
+   GLenum16 FragmentShaderDerivative; /**< GL_ARB_fragment_shader */
 };
 
 
@@ -691,15 +691,15 @@ struct gl_light_attrib
    GLboolean Enabled;			/**< Lighting enabled flag */
    GLboolean ColorMaterialEnabled;
 
-   GLenum ShadeModel;			/**< GL_FLAT or GL_SMOOTH */
-   GLenum ProvokingVertex;              /**< GL_EXT_provoking_vertex */
-   GLenum ColorMaterialFace;		/**< GL_FRONT, BACK or FRONT_AND_BACK */
-   GLenum ColorMaterialMode;		/**< GL_AMBIENT, GL_DIFFUSE, etc */
+   GLenum16 ShadeModel;			/**< GL_FLAT or GL_SMOOTH */
+   GLenum16 ProvokingVertex;              /**< GL_EXT_provoking_vertex */
+   GLenum16 ColorMaterialFace;		/**< GL_FRONT, BACK or FRONT_AND_BACK */
+   GLenum16 ColorMaterialMode;		/**< GL_AMBIENT, GL_DIFFUSE, etc */
    GLbitfield _ColorMaterialBitmask;	/**< bitmask formed from Face and Mode */
 
 
    GLboolean _ClampVertexColor;
-   GLenum ClampVertexColor;             /**< GL_TRUE, GL_FALSE, GL_FIXED_ONLY */
+   GLenum16 ClampVertexColor;             /**< GL_TRUE, GL_FALSE, GL_FIXED_ONLY */
 
    /**
     * Derived state for optimizations:
@@ -793,7 +793,7 @@ struct gl_pixelmaps
  */
 struct gl_pixel_attrib
 {
-   GLenum ReadBuffer;		/**< source buffer for glRead/CopyPixels() */
+   GLenum16 ReadBuffer;		/**< source buffer for glRead/CopyPixels() */
 
    /*--- Begin Pixel Transfer State ---*/
    /* Fields are in the order in which they're applied... */
@@ -833,8 +833,8 @@ struct gl_point_attrib
    GLboolean _Attenuated;	/**< True if Params != [1, 0, 0] */
    GLboolean PointSprite;	/**< GL_NV/ARB_point_sprite */
    GLbitfield CoordReplace;     /**< GL_ARB_point_sprite*/
-   GLenum SpriteRMode;		/**< GL_NV_point_sprite (only!) */
-   GLenum SpriteOrigin;		/**< GL_ARB_point_sprite */
+   GLenum16 SpriteRMode;	/**< GL_NV_point_sprite (only!) */
+   GLenum16 SpriteOrigin;	/**< GL_ARB_point_sprite */
 };
 
 
@@ -843,13 +843,13 @@ struct gl_point_attrib
  */
 struct gl_polygon_attrib
 {
-   GLenum FrontFace;		/**< Either GL_CW or GL_CCW */
-   GLenum FrontMode;		/**< Either GL_POINT, GL_LINE or GL_FILL */
-   GLenum BackMode;		/**< Either GL_POINT, GL_LINE or GL_FILL */
+   GLenum16 FrontFace;		/**< Either GL_CW or GL_CCW */
+   GLenum16 FrontMode;		/**< Either GL_POINT, GL_LINE or GL_FILL */
+   GLenum16 BackMode;		/**< Either GL_POINT, GL_LINE or GL_FILL */
    GLboolean CullFlag;		/**< Culling on/off flag */
    GLboolean SmoothFlag;	/**< True if GL_POLYGON_SMOOTH is enabled */
    GLboolean StippleFlag;	/**< True if GL_POLYGON_STIPPLE is enabled */
-   GLenum CullFaceMode;		/**< Culling mode GL_FRONT or GL_BACK */
+   GLenum16 CullFaceMode;	/**< Culling mode GL_FRONT or GL_BACK */
    GLfloat OffsetFactor;	/**< Polygon offset factor, from user */
    GLfloat OffsetUnits;		/**< Polygon offset units, from user */
    GLfloat OffsetClamp;		/**< Polygon offset clamp, from user */
@@ -874,7 +874,7 @@ struct gl_scissor_attrib
    GLbitfield EnableFlags;	/**< Scissor test enabled? */
    struct gl_scissor_rect ScissorArray[MAX_VIEWPORTS];
    GLint NumWindowRects;        /**< Count of enabled window rectangles */
-   GLenum WindowRectMode;       /**< Whether to include or exclude the rects */
+   GLenum16 WindowRectMode;     /**< Whether to include or exclude the rects */
    struct gl_scissor_rect WindowRects[MAX_WINDOW_RECTANGLES];
 };
 
@@ -901,10 +901,10 @@ struct gl_stencil_attrib
    GLboolean TestTwoSide;	/**< GL_EXT_stencil_two_side */
    GLubyte ActiveFace;		/**< GL_EXT_stencil_two_side (0 or 2) */
    GLubyte _BackFace;           /**< Current back stencil state (1 or 2) */
-   GLenum Function[3];		/**< Stencil function */
-   GLenum FailFunc[3];		/**< Fail function */
-   GLenum ZPassFunc[3];		/**< Depth buffer pass function */
-   GLenum ZFailFunc[3];		/**< Depth buffer fail function */
+   GLenum16 Function[3];	/**< Stencil function */
+   GLenum16 FailFunc[3];	/**< Fail function */
+   GLenum16 ZPassFunc[3];	/**< Depth buffer pass function */
+   GLenum16 ZFailFunc[3];	/**< Depth buffer fail function */
    GLint Ref[3];		/**< Reference value */
    GLuint ValueMask[3];		/**< Value mask */
    GLuint WriteMask[3];		/**< Write mask */
@@ -1019,19 +1019,19 @@ struct gl_sampler_object
    GLint RefCount;
    GLchar *Label;               /**< GL_KHR_debug */
 
-   GLenum WrapS;		/**< S-axis texture image wrap mode */
-   GLenum WrapT;		/**< T-axis texture image wrap mode */
-   GLenum WrapR;		/**< R-axis texture image wrap mode */
-   GLenum MinFilter;		/**< minification filter */
-   GLenum MagFilter;		/**< magnification filter */
+   GLenum16 WrapS;		/**< S-axis texture image wrap mode */
+   GLenum16 WrapT;		/**< T-axis texture image wrap mode */
+   GLenum16 WrapR;		/**< R-axis texture image wrap mode */
+   GLenum16 MinFilter;		/**< minification filter */
+   GLenum16 MagFilter;		/**< magnification filter */
    union gl_color_union BorderColor;  /**< Interpreted according to texture format */
    GLfloat MinLod;		/**< min lambda, OpenGL 1.2 */
    GLfloat MaxLod;		/**< max lambda, OpenGL 1.2 */
    GLfloat LodBias;		/**< OpenGL 1.4 */
    GLfloat MaxAnisotropy;	/**< GL_EXT_texture_filter_anisotropic */
-   GLenum CompareMode;		/**< GL_ARB_shadow */
-   GLenum CompareFunc;		/**< GL_ARB_shadow */
-   GLenum sRGBDecode;           /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
+   GLenum16 CompareMode;		/**< GL_ARB_shadow */
+   GLenum16 CompareFunc;		/**< GL_ARB_shadow */
+   GLenum16 sRGBDecode;           /**< GL_DECODE_EXT or GL_SKIP_DECODE_EXT */
    GLboolean CubeMapSeamless;   /**< GL_AMD_seamless_cubemap_per_texture */
 
    /** GL_ARB_bindless_texture */
@@ -1050,13 +1050,13 @@ struct gl_texture_object
    GLint RefCount;               /**< reference count */
    GLuint Name;                  /**< the user-visible texture object ID */
    GLchar *Label;                /**< GL_KHR_debug */
-   GLenum Target;                /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
+   GLenum16 Target;              /**< GL_TEXTURE_1D, GL_TEXTURE_2D, etc. */
    gl_texture_index TargetIndex; /**< The gl_texture_unit::CurrentTex index.
                                       Only valid when Target is valid. */
 
    struct gl_sampler_object Sampler;
 
-   GLenum DepthMode;           /**< GL_ARB_depth_texture */
+   GLenum16 DepthMode;           /**< GL_ARB_depth_texture */
 
    GLfloat Priority;           /**< in [0,1] */
    GLint BaseLevel;            /**< min mipmap level, OpenGL 1.2 */
@@ -1086,14 +1086,14 @@ struct gl_texture_object
    GLuint NumLayers;           /**< GL_ARB_texture_view */
 
    /** GL_EXT_memory_object */
-   GLenum TextureTiling;
+   GLenum16 TextureTiling;
 
    /** Actual texture images, indexed by [cube face] and [mipmap level] */
    struct gl_texture_image *Image[MAX_FACES][MAX_TEXTURE_LEVELS];
 
    /** GL_ARB_texture_buffer_object */
    struct gl_buffer_object *BufferObject;
-   GLenum BufferObjectFormat;
+   GLenum16 BufferObjectFormat;
    /** Equivalent Mesa format for BufferObjectFormat. */
    mesa_format _BufferObjectFormat;
    /** GL_ARB_texture_buffer_range */
@@ -1104,7 +1104,7 @@ struct gl_texture_object
    GLint RequiredTextureImageUnits;
 
    /** GL_ARB_shader_image_load_store */
-   GLenum ImageFormatCompatibilityType;
+   GLenum16 ImageFormatCompatibilityType;
 
    /** GL_ARB_bindless_texture */
    struct util_dynarray SamplerHandles;
@@ -1121,14 +1121,14 @@ struct gl_texture_object
  */
 struct gl_tex_env_combine_state
 {
-   GLenum ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
-   GLenum ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
+   GLenum16 ModeRGB;       /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
+   GLenum16 ModeA;         /**< GL_REPLACE, GL_DECAL, GL_ADD, etc. */
    /** Source terms: GL_PRIMARY_COLOR, GL_TEXTURE, etc */
-   GLenum SourceRGB[MAX_COMBINER_TERMS];
-   GLenum SourceA[MAX_COMBINER_TERMS];
+   GLenum16 SourceRGB[MAX_COMBINER_TERMS];
+   GLenum16 SourceA[MAX_COMBINER_TERMS];
    /** Source operands: GL_SRC_COLOR, GL_ONE_MINUS_SRC_COLOR, etc */
-   GLenum OperandRGB[MAX_COMBINER_TERMS];
-   GLenum OperandA[MAX_COMBINER_TERMS];
+   GLenum16 OperandRGB[MAX_COMBINER_TERMS];
+   GLenum16 OperandA[MAX_COMBINER_TERMS];
    GLuint ScaleShiftRGB; /**< 0, 1 or 2 */
    GLuint ScaleShiftA;   /**< 0, 1 or 2 */
    GLuint _NumArgsRGB;   /**< Number of inputs used for the RGB combiner */
@@ -1262,7 +1262,7 @@ struct gl_tex_env_combine_packed
  */
 struct gl_texgen
 {
-   GLenum Mode;         /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
+   GLenum16 Mode;       /**< GL_EYE_LINEAR, GL_SPHERE_MAP, etc */
    GLbitfield _ModeBit; /**< TEXGEN_x bit corresponding to Mode */
    GLfloat ObjectPlane[4];
    GLfloat EyePlane[4];
@@ -1277,7 +1277,7 @@ struct gl_texture_unit
 {
    GLbitfield Enabled;          /**< bitmask of TEXTURE_*_BIT flags */
 
-   GLenum EnvMode;              /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
+   GLenum16 EnvMode;            /**< GL_MODULATE, GL_DECAL, GL_BLEND, etc. */
    GLclampf EnvColor[4];
    GLfloat EnvColorUnclamped[4];
 
@@ -1373,7 +1373,7 @@ typedef GLfloat gl_clip_plane[4];
  */
 struct gl_transform_attrib
 {
-   GLenum MatrixMode;				/**< Matrix mode */
+   GLenum16 MatrixMode;				/**< Matrix mode */
    gl_clip_plane EyeUserPlane[MAX_CLIP_PLANES];	/**< User clip planes */
    gl_clip_plane _ClipUserPlane[MAX_CLIP_PLANES]; /**< derived */
    GLbitfield ClipPlanesEnabled;                /**< on/off bitmask */
@@ -1382,8 +1382,8 @@ struct gl_transform_attrib
    GLboolean RasterPositionUnclipped;           /**< GL_IBM_rasterpos_clip */
    GLboolean DepthClamp;			/**< GL_ARB_depth_clamp */
    /** GL_ARB_clip_control */
-   GLenum ClipOrigin;     /**< GL_LOWER_LEFT or GL_UPPER_LEFT */
-   GLenum ClipDepthMode;  /**< GL_NEGATIVE_ONE_TO_ONE or GL_ZERO_TO_ONE */
+   GLenum16 ClipOrigin;   /**< GL_LOWER_LEFT or GL_UPPER_LEFT */
+   GLenum16 ClipDepthMode;/**< GL_NEGATIVE_ONE_TO_ONE or GL_ZERO_TO_ONE */
 };
 
 
@@ -1442,7 +1442,7 @@ struct gl_buffer_object
    GLint RefCount;
    GLuint Name;
    GLchar *Label;       /**< GL_KHR_debug */
-   GLenum Usage;        /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
+   GLenum16 Usage;      /**< GL_STREAM_DRAW_ARB, GL_STREAM_READ_ARB, etc. */
    GLbitfield StorageFlags; /**< GL_MAP_PERSISTENT_BIT, etc. */
    GLsizeiptrARB Size;  /**< Size of buffer storage in bytes */
    GLubyte *Data;       /**< Location of storage either in RAM or VRAM. */
@@ -1498,8 +1498,8 @@ struct gl_pixelstore_attrib
 struct gl_vertex_array
 {
    GLint Size;                  /**< components per element (1,2,3,4) */
-   GLenum Type;                 /**< datatype: GL_FLOAT, GL_INT, etc */
-   GLenum Format;               /**< default: GL_RGBA, but may be GL_BGRA */
+   GLenum16 Type;               /**< datatype: GL_FLOAT, GL_INT, etc */
+   GLenum16 Format;             /**< default: GL_RGBA, but may be GL_BGRA */
    GLsizei StrideB;		/**< actual stride in bytes */
    GLuint _ElementSize;         /**< size of each element in bytes */
    const GLubyte *Ptr;          /**< Points to array data */
@@ -1528,8 +1528,8 @@ struct gl_vertex_array
 struct gl_array_attributes
 {
    GLint Size;              /**< Components per element (1,2,3,4) */
-   GLenum Type;             /**< Datatype: GL_FLOAT, GL_INT, etc */
-   GLenum Format;           /**< Default: GL_RGBA, but may be GL_BGRA */
+   GLenum16 Type;           /**< Datatype: GL_FLOAT, GL_INT, etc */
+   GLenum16 Format;         /**< Default: GL_RGBA, but may be GL_BGRA */
    GLsizei Stride;          /**< Stride as specified with gl*Pointer() */
    const GLubyte *Ptr;      /**< Points to client array data. Not used when a VBO is bound */
    GLintptr RelativeOffset; /**< Offset of the first element relative to the binding offset */
@@ -1673,7 +1673,7 @@ struct gl_array_attrib
  */
 struct gl_feedback
 {
-   GLenum Type;
+   GLenum16 Type;
    GLbitfield _Mask;    /**< FB_* bits */
    GLfloat *Buffer;
    GLuint BufferSize;
@@ -1762,7 +1762,7 @@ struct gl_evaluators
 struct gl_transform_feedback_varying_info
 {
    char *Name;
-   GLenum Type;
+   GLenum16 Type;
    GLint BufferIndex;
    GLint Size;
    GLint Offset;
@@ -1895,7 +1895,7 @@ struct gl_transform_feedback_object
  */
 struct gl_transform_feedback_state
 {
-   GLenum Mode;       /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
+   GLenum16 Mode;     /**< GL_POINTS, GL_LINES or GL_TRIANGLES */
 
    /** The general binding point (GL_TRANSFORM_FEEDBACK_BUFFER) */
    struct gl_buffer_object *CurrentBuffer;
@@ -1963,7 +1963,7 @@ struct gl_perf_monitor_counter
     * Data type of the counter.  Valid values are FLOAT, UNSIGNED_INT,
     * UNSIGNED_INT64_AMD, and PERCENTAGE_AMD.
     */
-   GLenum Type;
+   GLenum16 Type;
 
    /** Minimum counter value. */
    union gl_perf_monitor_counter_value Minimum;
@@ -2061,7 +2061,7 @@ struct gl_bindless_image
    GLboolean bound;
 
    /** Access qualifier (GL_READ_WRITE, GL_READ_ONLY, GL_WRITE_ONLY) */
-   GLenum access;
+   GLenum16 access;
 
    /** Pointer to the base of the data. */
    GLvoid *data;
@@ -2114,8 +2114,8 @@ struct gl_program
    GLubyte *String;  /**< Null-terminated program text */
 
    /** GL_VERTEX/FRAGMENT_PROGRAM_ARB, GL_GEOMETRY_PROGRAM_NV */
-   GLenum Target;
-   GLenum Format;    /**< String encoding format */
+   GLenum16 Target;
+   GLenum16 Format;    /**< String encoding format */
 
    GLboolean _Used;        /**< Ever used for drawing? Used for debugging */
 
@@ -2203,7 +2203,7 @@ struct gl_program
           * It may be different, though only more strict than the value of
           * \c gl_image_unit::Access for the corresponding image unit.
           */
-         GLenum ImageAccess[MAX_IMAGE_UNIFORMS];
+         GLenum16 ImageAccess[MAX_IMAGE_UNIFORMS];
 
          struct gl_uniform_block **UniformBlocks;
          struct gl_uniform_block **ShaderStorageBlocks;
@@ -2486,14 +2486,14 @@ struct gl_shader_info
        * GL_TRIANGLES, GL_QUADS, GL_ISOLINES or PRIM_UNKNOWN if it's not set
        * in this shader.
        */
-      GLenum PrimitiveMode;
+      GLenum16 PrimitiveMode;
 
       enum gl_tess_spacing Spacing;
 
       /**
        * GL_CW, GL_CCW, or 0 if it's not set in this shader.
        */
-      GLenum VertexOrder;
+      GLenum16 VertexOrder;
       /**
        * 1, 0, or -1 if it's not set in this shader.
        */
@@ -2515,12 +2515,12 @@ struct gl_shader_info
        * GL_TRIANGLES_ADJACENCY, or PRIM_UNKNOWN if it's not set in this
        * shader.
        */
-      GLenum InputType;
+      GLenum16 InputType;
        /**
         * GL_POINTS, GL_LINE_STRIP or GL_TRIANGLE_STRIP, or PRIM_UNKNOWN if
         * it's not set in this shader.
         */
-      GLenum OutputType;
+      GLenum16 OutputType;
    } Geom;
 
    /**
@@ -2608,7 +2608,7 @@ struct gl_shader
     *  GL_TESS_CONTROL_SHADER || GL_TESS_EVALUATION_SHADER.
     * Must be the first field.
     */
-   GLenum Type;
+   GLenum16 Type;
    gl_shader_stage Stage;
    GLuint Name;  /**< AKA the handle */
    GLint RefCount;  /**< Reference count */
@@ -2873,7 +2873,7 @@ struct gl_shader_variable
  */
 struct gl_program_resource
 {
-   GLenum Type; /** Program interface type. */
+   GLenum16 Type; /** Program interface type. */
    const void *Data; /** Pointer to resource associated data structure. */
    uint8_t StageReferences; /** Bitmask of shader stage references. */
 };
@@ -2948,7 +2948,7 @@ struct gl_shader_program_data
  */
 struct gl_shader_program
 {
-   GLenum Type;  /**< Always GL_SHADER_PROGRAM (internal token) */
+   GLenum16 Type;   /**< Always GL_SHADER_PROGRAM (internal token) */
    GLuint Name;  /**< aka handle or ID */
    GLchar *Label;   /**< GL_KHR_debug */
    GLint RefCount;  /**< Reference count */
@@ -2995,7 +2995,7 @@ struct gl_shader_program
     * feedback output, see LinkedTransformFeedback.
     */
    struct {
-      GLenum BufferMode;
+      GLenum16 BufferMode;
       /** Global xfb_stride out qualifier if any */
       GLuint BufferStride[MAX_FEEDBACK_BUFFERS];
       GLuint NumVarying;
@@ -3239,7 +3239,7 @@ struct gl_query_state
    /** GL_ARB_pipeline_statistics_query */
    struct gl_query_object *pipeline_stats[MAX_PIPELINE_STATISTICS];
 
-   GLenum CondRenderMode;
+   GLenum16 CondRenderMode;
 };
 
 
@@ -3252,7 +3252,7 @@ struct gl_sync_object
    GLboolean DeletePending;   /**< Object was deleted while there were still
                                * live references (e.g., sync not yet finished)
                                */
-   GLenum SyncCondition;
+   GLenum16 SyncCondition;
    GLbitfield Flags;          /**< Flags passed to glFenceSync */
    GLuint StatusFlag:1;       /**< Has the sync object been signaled? */
 };
@@ -3374,8 +3374,8 @@ struct gl_renderbuffer
     */
    GLboolean NeedsFinishRenderTexture;
    GLubyte NumSamples;    /**< zero means not multisampled */
-   GLenum InternalFormat; /**< The user-specified format */
-   GLenum _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
+   GLenum16 InternalFormat; /**< The user-specified format */
+   GLenum16 _BaseFormat;    /**< Either GL_RGB, GL_RGBA, GL_DEPTH_COMPONENT or
                                GL_STENCIL_INDEX. */
    mesa_format Format;      /**< The actual renderbuffer memory format */
    /**
@@ -3404,7 +3404,7 @@ struct gl_renderbuffer
  */
 struct gl_renderbuffer_attachment
 {
-   GLenum Type;  /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
+   GLenum16 Type; /**< \c GL_NONE or \c GL_TEXTURE or \c GL_RENDERBUFFER_EXT */
    GLboolean Complete;
 
    /**
@@ -3491,7 +3491,7 @@ struct gl_framebuffer
    /*@}*/
 
    /** One of the GL_FRAMEBUFFER_(IN)COMPLETE_* tokens */
-   GLenum _Status;
+   GLenum16 _Status;
 
    /** Whether one of Attachment has Type != GL_NONE
     * NOTE: the values for Width and Height are set to 0 in case of having
@@ -3530,8 +3530,8 @@ struct gl_framebuffer
    /* In unextended OpenGL these vars are part of the GL_COLOR_BUFFER
     * attribute group and GL_PIXEL attribute group, respectively.
     */
-   GLenum ColorDrawBuffer[MAX_DRAW_BUFFERS];
-   GLenum ColorReadBuffer;
+   GLenum16 ColorDrawBuffer[MAX_DRAW_BUFFERS];
+   GLenum16 ColorReadBuffer;
 
    /** Computed from ColorDraw/ReadBuffer above */
    GLuint _NumColorDrawBuffers;
@@ -3817,7 +3817,7 @@ struct gl_constants
    GLboolean QuadsFollowProvokingVertexConvention;
 
    /** GL_ARB_viewport_array */
-   GLenum LayerAndVPIndexProvokingVertex;
+   GLenum16 LayerAndVPIndexProvokingVertex;
 
    /** OpenGL version 3.0 */
    GLbitfield ContextFlags;  /**< Ex: GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT */
@@ -3843,7 +3843,7 @@ struct gl_constants
    GLuint MaxProgramTextureGatherComponents;
 
    /* GL_ARB_robustness */
-   GLenum ResetStrategy;
+   GLenum16 ResetStrategy;
 
    /* GL_KHR_robustness */
    GLboolean RobustAccess;
@@ -4032,7 +4032,7 @@ struct gl_constants
    GLboolean FakeSWMSAA;
 
    /** GL_KHR_context_flush_control */
-   GLenum ContextReleaseBehavior;
+   GLenum16 ContextReleaseBehavior;
 
    struct gl_shader_compiler_options ShaderCompilerOptions[MESA_SHADER_STAGES];
 
@@ -4439,7 +4439,7 @@ struct gl_dlist_state
       /* State known to have been set by the currently-compiling display
        * list.  Used to eliminate some redundant state changes.
        */
-      GLenum ShadeModel;
+      GLenum16 ShadeModel;
    } Current;
 };
 
@@ -4670,14 +4670,14 @@ struct gl_image_unit
     * Access allowed to this texture image.  Either \c GL_READ_ONLY,
     * \c GL_WRITE_ONLY or \c GL_READ_WRITE.
     */
-   GLenum Access;
+   GLenum16 Access;
 
    /**
     * GL internal format that determines the interpretation of the
     * image memory when shader image operations are performed through
     * this unit.
     */
-   GLenum Format;
+   GLenum16 Format;
 
    /**
     * Mesa format corresponding to \c Format.
@@ -4979,7 +4979,7 @@ struct gl_context
    /* GL_EXT_framebuffer_object */
    struct gl_renderbuffer *CurrentRenderbuffer;
 
-   GLenum ErrorValue;        /**< Last error code */
+   GLenum16 ErrorValue;      /**< Last error code */
 
    /**
     * Recognize and silence repeated error debug messages in buggy apps.
@@ -4991,7 +4991,7 @@ struct gl_context
    simple_mtx_t DebugMutex;
    struct gl_debug_state *Debug;
 
-   GLenum RenderMode;        /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
+   GLenum16 RenderMode;      /**< either GL_RENDER, GL_SELECT, GL_FEEDBACK */
    GLbitfield NewState;      /**< bitwise-or of _NEW_* flags */
    uint64_t NewDriverState;  /**< bitwise-or of flags from DriverFlags */