Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | /* $Id: stencil.c,v 1.1 2003-02-28 11:42:04 pj Exp $ */ |
| 2 | |||
| 3 | /* |
||
| 4 | * Mesa 3-D graphics library |
||
| 5 | * Version: 4.1 |
||
| 6 | * |
||
| 7 | * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. |
||
| 8 | * |
||
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 10 | * copy of this software and associated documentation files (the "Software"), |
||
| 11 | * to deal in the Software without restriction, including without limitation |
||
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 14 | * Software is furnished to do so, subject to the following conditions: |
||
| 15 | * |
||
| 16 | * The above copyright notice and this permission notice shall be included |
||
| 17 | * in all copies or substantial portions of the Software. |
||
| 18 | * |
||
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
||
| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
||
| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
||
| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
||
| 25 | */ |
||
| 26 | |||
| 27 | |||
| 28 | #include "glheader.h" |
||
| 29 | #include "imports.h" |
||
| 30 | #include "context.h" |
||
| 31 | #include "depth.h" |
||
| 32 | #include "macros.h" |
||
| 33 | #include "stencil.h" |
||
| 34 | #include "mtypes.h" |
||
| 35 | #include "enable.h" |
||
| 36 | |||
| 37 | |||
| 38 | void |
||
| 39 | _mesa_ClearStencil( GLint s ) |
||
| 40 | { |
||
| 41 | GET_CURRENT_CONTEXT(ctx); |
||
| 42 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 43 | |||
| 44 | if (ctx->Stencil.Clear == (GLstencil) s) |
||
| 45 | return; |
||
| 46 | |||
| 47 | FLUSH_VERTICES(ctx, _NEW_STENCIL); |
||
| 48 | ctx->Stencil.Clear = (GLstencil) s; |
||
| 49 | |||
| 50 | if (ctx->Driver.ClearStencil) { |
||
| 51 | (*ctx->Driver.ClearStencil)( ctx, s ); |
||
| 52 | } |
||
| 53 | } |
||
| 54 | |||
| 55 | |||
| 56 | |||
| 57 | void |
||
| 58 | _mesa_StencilFunc( GLenum func, GLint ref, GLuint mask ) |
||
| 59 | { |
||
| 60 | GET_CURRENT_CONTEXT(ctx); |
||
| 61 | const GLint face = ctx->Stencil.ActiveFace; |
||
| 62 | GLint maxref; |
||
| 63 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 64 | |||
| 65 | switch (func) { |
||
| 66 | case GL_NEVER: |
||
| 67 | case GL_LESS: |
||
| 68 | case GL_LEQUAL: |
||
| 69 | case GL_GREATER: |
||
| 70 | case GL_GEQUAL: |
||
| 71 | case GL_EQUAL: |
||
| 72 | case GL_NOTEQUAL: |
||
| 73 | case GL_ALWAYS: |
||
| 74 | break; |
||
| 75 | default: |
||
| 76 | _mesa_error( ctx, GL_INVALID_ENUM, "glStencilFunc" ); |
||
| 77 | return; |
||
| 78 | } |
||
| 79 | |||
| 80 | maxref = (1 << STENCIL_BITS) - 1; |
||
| 81 | ref = (GLstencil) CLAMP( ref, 0, maxref ); |
||
| 82 | |||
| 83 | if (ctx->Stencil.Function[face] == func && |
||
| 84 | ctx->Stencil.ValueMask[face] == (GLstencil) mask && |
||
| 85 | ctx->Stencil.Ref[face] == ref) |
||
| 86 | return; |
||
| 87 | |||
| 88 | FLUSH_VERTICES(ctx, _NEW_STENCIL); |
||
| 89 | ctx->Stencil.Function[face] = func; |
||
| 90 | ctx->Stencil.Ref[face] = ref; |
||
| 91 | ctx->Stencil.ValueMask[face] = (GLstencil) mask; |
||
| 92 | |||
| 93 | if (ctx->Driver.StencilFunc) { |
||
| 94 | (*ctx->Driver.StencilFunc)( ctx, func, ref, mask ); |
||
| 95 | } |
||
| 96 | } |
||
| 97 | |||
| 98 | |||
| 99 | |||
| 100 | void |
||
| 101 | _mesa_StencilMask( GLuint mask ) |
||
| 102 | { |
||
| 103 | GET_CURRENT_CONTEXT(ctx); |
||
| 104 | const GLint face = ctx->Stencil.ActiveFace; |
||
| 105 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 106 | |||
| 107 | if (ctx->Stencil.WriteMask[face] == (GLstencil) mask) |
||
| 108 | return; |
||
| 109 | |||
| 110 | FLUSH_VERTICES(ctx, _NEW_STENCIL); |
||
| 111 | ctx->Stencil.WriteMask[face] = (GLstencil) mask; |
||
| 112 | |||
| 113 | if (ctx->Driver.StencilMask) { |
||
| 114 | (*ctx->Driver.StencilMask)( ctx, mask ); |
||
| 115 | } |
||
| 116 | } |
||
| 117 | |||
| 118 | |||
| 119 | |||
| 120 | void |
||
| 121 | _mesa_StencilOp(GLenum fail, GLenum zfail, GLenum zpass) |
||
| 122 | { |
||
| 123 | GET_CURRENT_CONTEXT(ctx); |
||
| 124 | const GLint face = ctx->Stencil.ActiveFace; |
||
| 125 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 126 | |||
| 127 | switch (fail) { |
||
| 128 | case GL_KEEP: |
||
| 129 | case GL_ZERO: |
||
| 130 | case GL_REPLACE: |
||
| 131 | case GL_INCR: |
||
| 132 | case GL_DECR: |
||
| 133 | case GL_INVERT: |
||
| 134 | break; |
||
| 135 | case GL_INCR_WRAP_EXT: |
||
| 136 | case GL_DECR_WRAP_EXT: |
||
| 137 | if (!ctx->Extensions.EXT_stencil_wrap) { |
||
| 138 | break; |
||
| 139 | } |
||
| 140 | /* FALL-THROUGH */ |
||
| 141 | default: |
||
| 142 | _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp"); |
||
| 143 | return; |
||
| 144 | } |
||
| 145 | switch (zfail) { |
||
| 146 | case GL_KEEP: |
||
| 147 | case GL_ZERO: |
||
| 148 | case GL_REPLACE: |
||
| 149 | case GL_INCR: |
||
| 150 | case GL_DECR: |
||
| 151 | case GL_INVERT: |
||
| 152 | break; |
||
| 153 | case GL_INCR_WRAP_EXT: |
||
| 154 | case GL_DECR_WRAP_EXT: |
||
| 155 | if (ctx->Extensions.EXT_stencil_wrap) { |
||
| 156 | break; |
||
| 157 | } |
||
| 158 | /* FALL-THROUGH */ |
||
| 159 | default: |
||
| 160 | _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp"); |
||
| 161 | return; |
||
| 162 | } |
||
| 163 | switch (zpass) { |
||
| 164 | case GL_KEEP: |
||
| 165 | case GL_ZERO: |
||
| 166 | case GL_REPLACE: |
||
| 167 | case GL_INCR: |
||
| 168 | case GL_DECR: |
||
| 169 | case GL_INVERT: |
||
| 170 | break; |
||
| 171 | case GL_INCR_WRAP_EXT: |
||
| 172 | case GL_DECR_WRAP_EXT: |
||
| 173 | if (ctx->Extensions.EXT_stencil_wrap) { |
||
| 174 | break; |
||
| 175 | } |
||
| 176 | /* FALL-THROUGH */ |
||
| 177 | default: |
||
| 178 | _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOp"); |
||
| 179 | return; |
||
| 180 | } |
||
| 181 | |||
| 182 | if (ctx->Stencil.ZFailFunc[face] == zfail && |
||
| 183 | ctx->Stencil.ZPassFunc[face] == zpass && |
||
| 184 | ctx->Stencil.FailFunc[face] == fail) |
||
| 185 | return; |
||
| 186 | |||
| 187 | FLUSH_VERTICES(ctx, _NEW_STENCIL); |
||
| 188 | ctx->Stencil.ZFailFunc[face] = zfail; |
||
| 189 | ctx->Stencil.ZPassFunc[face] = zpass; |
||
| 190 | ctx->Stencil.FailFunc[face] = fail; |
||
| 191 | |||
| 192 | if (ctx->Driver.StencilOp) { |
||
| 193 | (*ctx->Driver.StencilOp)(ctx, fail, zfail, zpass); |
||
| 194 | } |
||
| 195 | } |
||
| 196 | |||
| 197 | |||
| 198 | /* GL_EXT_stencil_two_side */ |
||
| 199 | void |
||
| 200 | _mesa_ActiveStencilFaceEXT(GLenum face) |
||
| 201 | { |
||
| 202 | GET_CURRENT_CONTEXT(ctx); |
||
| 203 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 204 | |||
| 205 | if (face == GL_FRONT || face == GL_BACK) { |
||
| 206 | FLUSH_VERTICES(ctx, _NEW_STENCIL); |
||
| 207 | ctx->Stencil.ActiveFace = (face == GL_FRONT) ? 0 : 1; |
||
| 208 | } |
||
| 209 | |||
| 210 | if (ctx->Driver.ActiveStencilFace) { |
||
| 211 | (*ctx->Driver.ActiveStencilFace)( ctx, (GLuint) ctx->Stencil.ActiveFace ); |
||
| 212 | } |
||
| 213 | } |
||
| 214 |