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 8d8cbda4bc29ee6ce6165d85eeb74eed818791ce..ccb864691893b477006c41e36f70b54c4971d780 100644 (file)
--- a/src/mesa/main/stencil.h
+++ b/src/mesa/main/stencil.h
@@ -1,27 +1,30 @@
-/* $Id: stencil.h,v 1.2 1999/11/11 01:22:27 brianp Exp $ */
+/**
+ * \file stencil.h
+ * Stencil operations.
+ */
 
 /*
  * Mesa 3-D graphics library
- * Version:  3.3
- * 
- * Copyright (C) 1999  Brian Paul   All Rights Reserved.
- * 
+ *
+ * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * and/or sell copies of the Software, and to permit persons to whom the
  * Software is furnished to do so, subject to the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice shall be included
  * in all copies or substantial portions of the Software.
- * 
+ *
  * 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.
  */
 
 
@@ -29,59 +32,80 @@
 #define STENCIL_H
 
 
-#include "types.h"
+#include "glheader.h"
+#include "macros.h"
 
+struct gl_context;
 
-extern void
+extern void GLAPIENTRY
 _mesa_ClearStencil( GLint s );
 
 
-extern void
-_mesa_StencilFunc( GLenum func, GLint ref, GLuint mask );
+void GLAPIENTRY
+_mesa_StencilFunc_no_error(GLenum func, GLint ref, GLuint mask);
 
+extern void GLAPIENTRY
+_mesa_StencilFunc(GLenum func, GLint ref, GLuint mask);
 
-extern void
-_mesa_StencilMask( GLuint mask );
 
+extern void GLAPIENTRY
+_mesa_StencilMask( GLuint mask );
 
-extern void
-_mesa_StencilOp( GLenum fail, GLenum zfail, GLenum zpass );
+void GLAPIENTRY
+_mesa_StencilOp_no_error(GLenum fail, GLenum zfail, GLenum zpass);
 
+extern void GLAPIENTRY
+_mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass);
 
 
-extern GLint gl_stencil_span( GLcontext *ctx,
-                              GLuint n, GLint x, GLint y, GLubyte mask[] );
+extern void GLAPIENTRY
+_mesa_ActiveStencilFaceEXT(GLenum face);
 
+void GLAPIENTRY
+_mesa_StencilOpSeparate_no_error(GLenum face, GLenum fail, GLenum zfail,
+                                 GLenum zpass);
 
-extern void gl_depth_stencil_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
-                                  const GLdepth z[], GLubyte mask[] );
+extern void GLAPIENTRY
+_mesa_StencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass);
 
 
-extern GLint gl_stencil_pixels( GLcontext *ctx,
-                                GLuint n, const GLint x[], const GLint y[],
-                               GLubyte mask[] );
+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);
 
-extern void gl_depth_stencil_pixels( GLcontext *ctx,
-                                     GLuint n, const GLint x[],
-                                    const GLint y[], const GLdepth z[],
-                                    GLubyte mask[] );
 
+extern void GLAPIENTRY
+_mesa_StencilFuncSeparateATI(GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
 
-extern void gl_read_stencil_span( GLcontext *ctx,
-                                  GLuint n, GLint x, GLint y,
-                                 GLstencil stencil[] );
+void GLAPIENTRY
+_mesa_StencilMaskSeparate_no_error(GLenum face, GLuint mask);
 
+extern void GLAPIENTRY
+_mesa_StencilMaskSeparate(GLenum face, GLuint mask);
 
-extern void gl_write_stencil_span( GLcontext *ctx,
-                                   GLuint n, GLint x, GLint y,
-                                  const GLstencil stencil[] );
 
+extern void
+_mesa_update_stencil(struct gl_context *ctx);
 
-extern void gl_alloc_stencil_buffer( GLcontext *ctx );
 
+extern void 
+_mesa_init_stencil( struct gl_context * ctx );
 
-extern void gl_clear_stencil_buffer( GLcontext *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