-/* $Id: stencil.h,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
+/**
+ * \file stencil.h
+ * Stencil operations.
+ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- *
- * 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.
*/
-
-
-
#ifndef STENCIL_H
#define STENCIL_H
-#include "types.h"
+#include "glheader.h"
+#include "macros.h"
+struct gl_context;
-extern void gl_ClearStencil( GLcontext *ctx, GLint s );
+extern void GLAPIENTRY
+_mesa_ClearStencil( GLint s );
-extern void gl_StencilFunc( GLcontext *ctx, 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 gl_StencilMask( GLcontext *ctx, GLuint mask );
+extern void GLAPIENTRY
+_mesa_StencilMask( GLuint mask );
-extern void gl_StencilOp( GLcontext *ctx, 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_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."
+ */
-extern void gl_alloc_stencil_buffer( GLcontext *ctx );
-
-
-extern void gl_clear_stencil_buffer( GLcontext *ctx );
-
+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
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