mesa: add KHR_no_error support for glStencilOp()

[mesa.git] / src / mesa / main / stencil.h

diff --git a/src/mesa/main/stencil.h b/src/mesa/main/stencil.h
index b772bfd6e6f66c7391cdcb77bde874360812a64e..ccb864691893b477006c41e36f70b54c4971d780 100644 (file)
--- 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.
  */
 
 
@@ -33,6 +33,7 @@
 
 
 #include "glheader.h"
+#include "macros.h"
 
 struct gl_context;
 
@@ -40,26 +41,38 @@ 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);
 
@@ -67,6 +80,9 @@ _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);
 
@@ -78,4 +94,18 @@ _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);
+}
+
 #endif