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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5564 | serge | 1 | /** |
| 2 | * \file stencil.h |
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| 3 | * Stencil operations. |
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| 4 | */ |
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| 5 | |||
| 6 | /* |
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| 7 | * Mesa 3-D graphics library |
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| 8 | * |
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| 9 | * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
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| 10 | * |
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| 11 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 12 | * copy of this software and associated documentation files (the "Software"), |
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| 13 | * to deal in the Software without restriction, including without limitation |
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| 14 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 15 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 16 | * Software is furnished to do so, subject to the following conditions: |
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| 17 | * |
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| 18 | * The above copyright notice and this permission notice shall be included |
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| 19 | * in all copies or substantial portions of the Software. |
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| 20 | * |
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| 21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 22 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 24 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 25 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 26 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 27 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 28 | */ |
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| 29 | |||
| 30 | |||
| 31 | #ifndef STENCIL_H |
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| 32 | #define STENCIL_H |
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| 33 | |||
| 34 | |||
| 35 | #include "glheader.h" |
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| 36 | #include "macros.h" |
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| 37 | |||
| 38 | struct gl_context; |
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| 39 | |||
| 40 | extern void GLAPIENTRY |
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| 41 | _mesa_ClearStencil( GLint s ); |
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| 42 | |||
| 43 | |||
| 44 | extern void GLAPIENTRY |
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| 45 | _mesa_StencilFunc( GLenum func, GLint ref, GLuint mask ); |
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| 46 | |||
| 47 | |||
| 48 | extern void GLAPIENTRY |
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| 49 | _mesa_StencilMask( GLuint mask ); |
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| 50 | |||
| 51 | |||
| 52 | extern void GLAPIENTRY |
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| 53 | _mesa_StencilOp( GLenum fail, GLenum zfail, GLenum zpass ); |
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| 54 | |||
| 55 | |||
| 56 | extern void GLAPIENTRY |
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| 57 | _mesa_ActiveStencilFaceEXT(GLenum face); |
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| 58 | |||
| 59 | |||
| 60 | extern void GLAPIENTRY |
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| 61 | _mesa_StencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass); |
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| 62 | |||
| 63 | |||
| 64 | extern void GLAPIENTRY |
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| 65 | _mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask); |
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| 66 | |||
| 67 | |||
| 68 | extern void GLAPIENTRY |
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| 69 | _mesa_StencilFuncSeparateATI(GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask); |
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| 70 | |||
| 71 | extern void GLAPIENTRY |
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| 72 | _mesa_StencilMaskSeparate(GLenum face, GLuint mask); |
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| 73 | |||
| 74 | |||
| 75 | extern void |
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| 76 | _mesa_update_stencil(struct gl_context *ctx); |
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| 77 | |||
| 78 | |||
| 79 | extern void |
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| 80 | _mesa_init_stencil( struct gl_context * ctx ); |
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| 81 | |||
| 82 | /* From the GL 4.3 spec, 17.3.5: |
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| 83 | * "Stencil comparison operations and queries of clamp its value |
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| 84 | * to the range [0, 2^s-1], where |
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| 85 | * stencil buffer attached to the draw framebuffer." |
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| 86 | */ |
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| 87 | |||
| 88 | static inline GLint |
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| 89 | _mesa_get_stencil_ref(struct gl_context const *ctx, int face) |
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| 90 | { |
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| 91 | GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1; |
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| 92 | GLint ref = ctx->Stencil.Ref[face]; |
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| 93 | return CLAMP(ref, 0, stencilMax); |
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| 94 | } |
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| 95 | |||
| 96 | #endif |