/*
* Mesa 3-D graphics library
- * Version: 6.5
*
- * Copyright (C) 1999-2005 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"),
* 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.
*/
#define STENCIL_H
-#include "mtypes.h"
+#include "glheader.h"
+#include "macros.h"
+struct gl_context;
extern void GLAPIENTRY
_mesa_ClearStencil( GLint s );
_mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask);
+extern void GLAPIENTRY
+_mesa_StencilFuncSeparateATI(GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask);
+
extern void GLAPIENTRY
_mesa_StencilMaskSeparate(GLenum face, GLuint mask);
extern void
-_mesa_update_stencil(GLcontext *ctx);
+_mesa_update_stencil(struct gl_context *ctx);
extern void
-_mesa_init_stencil( GLcontext * ctx );
+_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