X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fmain%2Fstencil.h;h=dc371ec36cd8a7e4f9a9f4d22c655fcd0e973721;hb=51c1c4d95a05b6eb6fce74e8d624615e4a1b38ab;hp=38a7183a811397cc476920ab86c902f5f7346d4d;hpb=41ed47d6b8fb6c032e2907ef2e49e414c26f35c1;p=mesa.git

diff --git a/src/mesa/main/stencil.h b/src/mesa/main/stencil.h
index 38a7183a811..dc371ec36cd 100644
--- a/src/mesa/main/stencil.h
+++ b/src/mesa/main/stencil.h
@@ -5,7 +5,6 @@
 
 /*
  * Mesa 3-D graphics library
- * Version:  7.1
  *
  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
  *
@@ -22,9 +21,10 @@
  * 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
- * BRIAN PAUL 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.
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
  */
 
 
@@ -32,33 +32,47 @@
 #define STENCIL_H
 
 
-#include "mtypes.h"
+#include "glheader.h"
+#include "macros.h"
 
+struct gl_context;
 
 extern void GLAPIENTRY
 _mesa_ClearStencil( GLint s );
 
 
+void GLAPIENTRY
+_mesa_StencilFunc_no_error(GLenum func, GLint ref, GLuint mask);
+
 extern void GLAPIENTRY
-_mesa_StencilFunc( GLenum func, GLint ref, GLuint mask );
+_mesa_StencilFunc(GLenum func, GLint ref, GLuint mask);
 
 
 extern void GLAPIENTRY
 _mesa_StencilMask( GLuint mask );
 
+void GLAPIENTRY
+_mesa_StencilOp_no_error(GLenum fail, GLenum zfail, GLenum zpass);
 
 extern void GLAPIENTRY
-_mesa_StencilOp( GLenum fail, GLenum zfail, GLenum zpass );
+_mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass);
 
 
 extern void GLAPIENTRY
 _mesa_ActiveStencilFaceEXT(GLenum face);
 
+void GLAPIENTRY
+_mesa_StencilOpSeparate_no_error(GLenum face, GLenum fail, GLenum zfail,
+                                 GLenum zpass);
 
 extern void GLAPIENTRY
 _mesa_StencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass);
 
 
+void GLAPIENTRY
+_mesa_StencilFuncSeparate_no_error(GLenum face, GLenum func, GLint ref,
+                                   GLuint mask);
+
 extern void GLAPIENTRY
 _mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask);
 
@@ -66,15 +80,58 @@ _mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask);
 extern void GLAPIENTRY
 _mesa_StencilFuncSeparateATI(GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
 
+void GLAPIENTRY
+_mesa_StencilMaskSeparate_no_error(GLenum face, GLuint mask);
+
 extern void GLAPIENTRY
 _mesa_StencilMaskSeparate(GLenum face, GLuint mask);
 
-
-extern void
-_mesa_update_stencil(struct gl_context *ctx);
-
-
 extern void 
 _mesa_init_stencil( struct gl_context * ctx );
 
+/* From the GL 4.3 spec, 17.3.5:
+ *    "Stencil comparison operations and queries of <ref> clamp its value
+ *    to the range [0, 2^s-1], where <s> is the number of bits in the
+ *    stencil buffer attached to the draw framebuffer."
+ */
+
+static inline GLint
+_mesa_get_stencil_ref(struct gl_context const *ctx, int face)
+{
+   GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
+   GLint ref = ctx->Stencil.Ref[face];
+   return CLAMP(ref, 0, stencilMax);
+}
+
+static inline bool
+_mesa_stencil_is_enabled(const struct gl_context *ctx)
+{
+   return ctx->Stencil.Enabled &&
+          ctx->DrawBuffer->Visual.stencilBits > 0;
+}
+
+static inline bool
+_mesa_stencil_is_two_sided(const struct gl_context *ctx)
+{
+   const int face = ctx->Stencil._BackFace;
+
+   return _mesa_stencil_is_enabled(ctx) &&
+          (ctx->Stencil.Function[0] != ctx->Stencil.Function[face] ||
+           ctx->Stencil.FailFunc[0] != ctx->Stencil.FailFunc[face] ||
+           ctx->Stencil.ZPassFunc[0] != ctx->Stencil.ZPassFunc[face] ||
+           ctx->Stencil.ZFailFunc[0] != ctx->Stencil.ZFailFunc[face] ||
+           ctx->Stencil.Ref[0] != ctx->Stencil.Ref[face] ||
+           ctx->Stencil.ValueMask[0] != ctx->Stencil.ValueMask[face] ||
+           ctx->Stencil.WriteMask[0] != ctx->Stencil.WriteMask[face]);
+}
+
+static inline bool
+_mesa_stencil_is_write_enabled(const struct gl_context *ctx, bool is_two_sided)
+{
+   return _mesa_stencil_is_enabled(ctx) &&
+          (ctx->Stencil.WriteMask[0] != 0 ||
+           (is_two_sided &&
+            ctx->Stencil.WriteMask[ctx->Stencil._BackFace] != 0));
+}
+
 #endif