Add ATI_separate_stencil and use it in preference to EXT_stencil_two_side

since the former is what's used for OpenGL 2.0.

4 files changed, 57 insertions, 56 deletions

diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c
index 5edf9a7dd6..39f8e26f57 100644
--- a/src/mesa/main/extensions.c
+++ b/src/mesa/main/extensions.c
@@ -135,6 +135,7 @@ static const struct {
    { OFF, "GL_ATI_texture_env_combine3",       F(ATI_texture_env_combine3)},
    { OFF, "GL_ATI_texture_mirror_once",        F(ATI_texture_mirror_once)},
    { OFF, "GL_ATI_fragment_shader",            F(ATI_fragment_shader)},
+   { OFF, "GL_ATI_separate_stencil",           F(ATI_separate_stencil)},
    { OFF, "GL_IBM_multimode_draw_arrays",      F(IBM_multimode_draw_arrays) },
    { ON,  "GL_IBM_rasterpos_clip",             F(IBM_rasterpos_clip) },
    { OFF, "GL_IBM_texture_mirrored_repeat",    F(ARB_texture_mirrored_repeat)},
@@ -222,6 +223,7 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
 #endif
    ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
    ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
+   ctx->Extensions.ATI_separate_stencil = GL_TRUE;
    ctx->Extensions.EXT_blend_color = GL_TRUE;
    ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
    ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
@@ -249,7 +251,7 @@ _mesa_enable_sw_extensions(GLcontext *ctx)
    ctx->Extensions.EXT_secondary_color = GL_TRUE;
    ctx->Extensions.EXT_shared_texture_palette = GL_TRUE;
    ctx->Extensions.EXT_stencil_wrap = GL_TRUE;
-   ctx->Extensions.EXT_stencil_two_side = GL_TRUE;
+   ctx->Extensions.EXT_stencil_two_side = GL_FALSE; /* obsolete */
    ctx->Extensions.EXT_texture_env_add = GL_TRUE;
    ctx->Extensions.EXT_texture_env_combine = GL_TRUE;
    ctx->Extensions.EXT_texture_env_dot3 = GL_TRUE;
@@ -388,7 +390,8 @@ _mesa_enable_2_0_extensions(GLcontext *ctx)
 #if FEATURE_ARB_shading_language_100
    ctx->Extensions.ARB_shading_language_100 = GL_TRUE;
 #endif
-   ctx->Extensions.EXT_stencil_two_side = GL_FALSE; /* yes, turn it off */
+   ctx->Extensions.ATI_separate_stencil = GL_TRUE;
+   ctx->Extensions.EXT_stencil_two_side = GL_FALSE; /* obsolete */
 #if FEATURE_ARB_vertex_shader
    ctx->Extensions.ARB_vertex_shader = GL_TRUE;
 #endif
diff --git a/src/mesa/main/getstring.c b/src/mesa/main/getstring.c
index a68bf9ff74..f2989aaefa 100644
--- a/src/mesa/main/getstring.c
+++ b/src/mesa/main/getstring.c
@@ -54,7 +54,7 @@ _mesa_GetString( GLenum name )
    static const char *version_1_3 = "1.3 Mesa " MESA_VERSION_STRING;
    static const char *version_1_4 = "1.4 Mesa " MESA_VERSION_STRING;
    static const char *version_1_5 = "1.5 Mesa " MESA_VERSION_STRING;
-   static const char *version_2_0 = "1.5 Mesa " MESA_VERSION_STRING;/*XXX FIX*/
+   static const char *version_2_0 = "1.5 Mesa " MESA_VERSION_STRING;
 
 #if FEATURE_ARB_shading_language_100
    static const char *sl_version_110 = "1.10 Mesa " MESA_VERSION_STRING;
@@ -111,7 +111,7 @@ _mesa_GetString( GLenum name )
                   if (ctx->Extensions.ARB_draw_buffers &&
                       ctx->Extensions.ARB_point_sprite &&
                       ctx->Extensions.ARB_texture_non_power_of_two &&
-                      ctx->Extensions.EXT_stencil_two_side) {
+                      ctx->Extensions.ATI_separate_stencil) {
                      return (const GLubyte *) version_2_0;
                   }
                   else {
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 1399dddf50..337b0d2720 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -2477,6 +2477,7 @@ struct gl_extensions
    GLboolean ATI_texture_mirror_once;
    GLboolean ATI_texture_env_combine3;
    GLboolean ATI_fragment_shader;
+   GLboolean ATI_separate_stencil;
    GLboolean IBM_rasterpos_clip;
    GLboolean IBM_multimode_draw_arrays;
    GLboolean MESA_pack_invert;
diff --git a/src/mesa/main/stencil.c b/src/mesa/main/stencil.c
index 9992ec9b6e..d6be410e76 100644
--- a/src/mesa/main/stencil.c
+++ b/src/mesa/main/stencil.c
@@ -115,23 +115,7 @@ _mesa_StencilFunc( GLenum func, GLint ref, GLuint mask )
 
    ref = CLAMP( ref, 0, stencilMax );
 
-   if (ctx->Extensions.EXT_stencil_two_side) {
-      /* only set active face state */
-      const GLint face = ctx->Stencil.ActiveFace;
-      if (ctx->Stencil.Function[face] == func &&
-          ctx->Stencil.ValueMask[face] == mask &&
-          ctx->Stencil.Ref[face] == ref)
-         return;
-      FLUSH_VERTICES(ctx, _NEW_STENCIL);
-      ctx->Stencil.Function[face] = func;
-      ctx->Stencil.Ref[face] = ref;
-      ctx->Stencil.ValueMask[face] = mask;
-      if (ctx->Driver.StencilFuncSeparate) {
-         ctx->Driver.StencilFuncSeparate(ctx, face ? GL_BACK : GL_FRONT,
-                                         func, ref, mask);
-      }
-   }
-   else {
+   if (ctx->Extensions.ATI_separate_stencil) {
       /* set both front and back state */
       if (ctx->Stencil.Function[0] == func &&
           ctx->Stencil.Function[1] == func &&
@@ -149,6 +133,22 @@ _mesa_StencilFunc( GLenum func, GLint ref, GLuint mask )
                                          func, ref, mask);
       }
    }
+   else {
+      /* only set active face state */
+      const GLint face = ctx->Stencil.ActiveFace;
+      if (ctx->Stencil.Function[face] == func &&
+          ctx->Stencil.ValueMask[face] == mask &&
+          ctx->Stencil.Ref[face] == ref)
+         return;
+      FLUSH_VERTICES(ctx, _NEW_STENCIL);
+      ctx->Stencil.Function[face] = func;
+      ctx->Stencil.Ref[face] = ref;
+      ctx->Stencil.ValueMask[face] = mask;
+      if (ctx->Driver.StencilFuncSeparate) {
+         ctx->Driver.StencilFuncSeparate(ctx, face ? GL_BACK : GL_FRONT,
+                                         func, ref, mask);
+      }
+   }
 }
 
 
@@ -169,26 +169,26 @@ _mesa_StencilMask( GLuint mask )
    GET_CURRENT_CONTEXT(ctx);
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   if (ctx->Extensions.EXT_stencil_two_side) {
-      /* only set active face state */
-      const GLint face = ctx->Stencil.ActiveFace;
-      if (ctx->Stencil.WriteMask[face] == mask)
+   if (ctx->Extensions.ATI_separate_stencil) {
+      /* set both front and back state */
+      if (ctx->Stencil.WriteMask[0] == mask &&
+          ctx->Stencil.WriteMask[1] == mask)
          return;
       FLUSH_VERTICES(ctx, _NEW_STENCIL);
-      ctx->Stencil.WriteMask[face] = mask;
+      ctx->Stencil.WriteMask[0] = ctx->Stencil.WriteMask[1] = mask;
       if (ctx->Driver.StencilMaskSeparate) {
-         ctx->Driver.StencilMaskSeparate(ctx, face ? GL_BACK : GL_FRONT, mask);
+         ctx->Driver.StencilMaskSeparate(ctx, GL_FRONT_AND_BACK, mask);
       }
    }
    else {
-      /* set both front and back state */
-      if (ctx->Stencil.WriteMask[0] == mask &&
-          ctx->Stencil.WriteMask[1] == mask)
+      /* only set active face state */
+      const GLint face = ctx->Stencil.ActiveFace;
+      if (ctx->Stencil.WriteMask[face] == mask)
          return;
       FLUSH_VERTICES(ctx, _NEW_STENCIL);
-      ctx->Stencil.WriteMask[0] = ctx->Stencil.WriteMask[1] = mask;
+      ctx->Stencil.WriteMask[face] = mask;
       if (ctx->Driver.StencilMaskSeparate) {
-         ctx->Driver.StencilMaskSeparate(ctx, GL_FRONT_AND_BACK, mask);
+         ctx->Driver.StencilMaskSeparate(ctx, face ? GL_BACK : GL_FRONT, mask);
       }
    }
 }
@@ -269,23 +269,7 @@ _mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass)
          return;
    }
 
-   if (ctx->Extensions.EXT_stencil_two_side) {
-      /* only set active face state */
-      const GLint face = ctx->Stencil.ActiveFace;
-      if (ctx->Stencil.ZFailFunc[face] == zfail &&
-          ctx->Stencil.ZPassFunc[face] == zpass &&
-          ctx->Stencil.FailFunc[face] == fail)
-         return;
-      FLUSH_VERTICES(ctx, _NEW_STENCIL);
-      ctx->Stencil.ZFailFunc[face] = zfail;
-      ctx->Stencil.ZPassFunc[face] = zpass;
-      ctx->Stencil.FailFunc[face] = fail;
-      if (ctx->Driver.StencilOpSeparate) {
-         ctx->Driver.StencilOpSeparate(ctx, face ? GL_BACK : GL_FRONT,
-                                       fail, zfail, zpass);
-      }
-   }
-   else {
+   if (ctx->Extensions.ATI_separate_stencil) {
       /* set both front and back state */
       if (ctx->Stencil.ZFailFunc[0] == zfail &&
           ctx->Stencil.ZFailFunc[1] == zfail &&
@@ -303,6 +287,22 @@ _mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass)
                                        fail, zfail, zpass);
       }
    }
+   else {
+      /* only set active face state */
+      const GLint face = ctx->Stencil.ActiveFace;
+      if (ctx->Stencil.ZFailFunc[face] == zfail &&
+          ctx->Stencil.ZPassFunc[face] == zpass &&
+          ctx->Stencil.FailFunc[face] == fail)
+         return;
+      FLUSH_VERTICES(ctx, _NEW_STENCIL);
+      ctx->Stencil.ZFailFunc[face] = zfail;
+      ctx->Stencil.ZPassFunc[face] = zpass;
+      ctx->Stencil.FailFunc[face] = fail;
+      if (ctx->Driver.StencilOpSeparate) {
+         ctx->Driver.StencilOpSeparate(ctx, face ? GL_BACK : GL_FRONT,
+                                       fail, zfail, zpass);
+      }
+   }
 }
 
 
@@ -406,17 +406,16 @@ _mesa_StencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass)
 
    FLUSH_VERTICES(ctx, _NEW_STENCIL);
 
-   if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
+   if (face != GL_BACK) {
       ctx->Stencil.FailFunc[0] = fail;
       ctx->Stencil.ZFailFunc[0] = zfail;
       ctx->Stencil.ZPassFunc[0] = zpass;
    }
-   if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
+   if (face != GL_FRONT) {
       ctx->Stencil.FailFunc[1] = fail;
       ctx->Stencil.ZFailFunc[1] = zfail;
       ctx->Stencil.ZPassFunc[1] = zpass;
    }
-
    if (ctx->Driver.StencilOpSeparate) {
       ctx->Driver.StencilOpSeparate(ctx, face, fail, zfail, zpass);
    }
@@ -465,7 +464,6 @@ _mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
       ctx->Stencil.Ref[1] = ref;
       ctx->Stencil.ValueMask[1] = mask;
    }
-
    if (ctx->Driver.StencilFuncSeparate) {
       ctx->Driver.StencilFuncSeparate(ctx, face, func, ref, mask);
    }
@@ -486,13 +484,12 @@ _mesa_StencilMaskSeparate(GLenum face, GLuint mask)
 
    FLUSH_VERTICES(ctx, _NEW_STENCIL);
 
-   if (face == GL_FRONT || face == GL_FRONT_AND_BACK) {
+   if (face != GL_BACK) {
       ctx->Stencil.WriteMask[0] = mask;
    }
-   if (face == GL_BACK || face == GL_FRONT_AND_BACK) {
+   if (face != GL_FRONT) {
       ctx->Stencil.WriteMask[1] = mask;
    }
-
    if (ctx->Driver.StencilMaskSeparate) {
       ctx->Driver.StencilMaskSeparate(ctx, face, mask);
    }