mesa: add support for GL_AMD_depth_clamp_separate tokens

_mesa_set_enable() and _mesa_IsEnabled() extended to accept new two
tokens GL_DEPTH_CLAMP_NEAR_AMD and GL_DEPTH_CLAMP_FAR_AMD.

v2: Remove unnecessary parentheses (Marek Olsak)

Signed-off-by: Sagar Ghuge <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 36 insertions, 0 deletions

diff --git a/src/mesa/main/enable.c b/src/mesa/main/enable.c
index 30d275075d5..bd3e493da53 100644
--- a/src/mesa/main/enable.c
+++ b/src/mesa/main/enable.c
@@ -1017,6 +1017,30 @@ _mesa_set_enable(struct gl_context *ctx, GLenum cap, GLboolean state)
          ctx->Transform.DepthClampFar = state;
          break;
 
+      case GL_DEPTH_CLAMP_NEAR_AMD:
+         if (!_mesa_is_desktop_gl(ctx))
+            goto invalid_enum_error;
+         CHECK_EXTENSION(AMD_depth_clamp_separate, cap);
+         if (ctx->Transform.DepthClampNear == state)
+            return;
+         FLUSH_VERTICES(ctx, ctx->DriverFlags.NewDepthClamp ? 0 :
+                                                           _NEW_TRANSFORM);
+         ctx->NewDriverState |= ctx->DriverFlags.NewDepthClamp;
+         ctx->Transform.DepthClampNear = state;
+         break;
+
+      case GL_DEPTH_CLAMP_FAR_AMD:
+         if (!_mesa_is_desktop_gl(ctx))
+            goto invalid_enum_error;
+         CHECK_EXTENSION(AMD_depth_clamp_separate, cap);
+         if (ctx->Transform.DepthClampFar == state)
+            return;
+         FLUSH_VERTICES(ctx, ctx->DriverFlags.NewDepthClamp ? 0 :
+                                                           _NEW_TRANSFORM);
+         ctx->NewDriverState |= ctx->DriverFlags.NewDepthClamp;
+         ctx->Transform.DepthClampFar = state;
+         break;
+
       case GL_FRAGMENT_SHADER_ATI:
          if (ctx->API != API_OPENGL_COMPAT)
             goto invalid_enum_error;
@@ -1689,6 +1713,18 @@ _mesa_IsEnabled( GLenum cap )
          return ctx->Transform.DepthClampNear ||
                 ctx->Transform.DepthClampFar;
 
+      case GL_DEPTH_CLAMP_NEAR_AMD:
+         if (!_mesa_is_desktop_gl(ctx))
+            goto invalid_enum_error;
+         CHECK_EXTENSION(AMD_depth_clamp_separate);
+         return ctx->Transform.DepthClampNear;
+
+      case GL_DEPTH_CLAMP_FAR_AMD:
+         if (!_mesa_is_desktop_gl(ctx))
+            goto invalid_enum_error;
+         CHECK_EXTENSION(AMD_depth_clamp_separate);
+         return ctx->Transform.DepthClampFar;
+
       case GL_FRAGMENT_SHADER_ATI:
          if (ctx->API != API_OPENGL_COMPAT)
             goto invalid_enum_error;