Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1901 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
||
| 3 | * Version: 7.1 |
||
| 4 | * |
||
| 5 | * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
||
| 6 | * |
||
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 8 | * copy of this software and associated documentation files (the "Software"), |
||
| 9 | * to deal in the Software without restriction, including without limitation |
||
| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 12 | * Software is furnished to do so, subject to the following conditions: |
||
| 13 | * |
||
| 14 | * The above copyright notice and this permission notice shall be included |
||
| 15 | * in all copies or substantial portions of the Software. |
||
| 16 | * |
||
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
||
| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
||
| 21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
||
| 22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
||
| 23 | */ |
||
| 24 | |||
| 25 | |||
| 26 | #include "glheader.h" |
||
| 27 | #include "imports.h" |
||
| 28 | #include "context.h" |
||
| 29 | #include "depth.h" |
||
| 30 | #include "enums.h" |
||
| 31 | #include "macros.h" |
||
| 32 | #include "mtypes.h" |
||
| 33 | |||
| 34 | |||
| 35 | /**********************************************************************/ |
||
| 36 | /***** API Functions *****/ |
||
| 37 | /**********************************************************************/ |
||
| 38 | |||
| 39 | |||
| 40 | |||
| 41 | void GLAPIENTRY |
||
| 42 | _mesa_ClearDepth( GLclampd depth ) |
||
| 43 | { |
||
| 44 | GET_CURRENT_CONTEXT(ctx); |
||
| 45 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 46 | |||
| 47 | depth = CLAMP( depth, 0.0, 1.0 ); |
||
| 48 | |||
| 49 | if (ctx->Depth.Clear == depth) |
||
| 50 | return; |
||
| 51 | |||
| 52 | FLUSH_VERTICES(ctx, _NEW_DEPTH); |
||
| 53 | ctx->Depth.Clear = depth; |
||
| 54 | if (ctx->Driver.ClearDepth) |
||
| 55 | (*ctx->Driver.ClearDepth)( ctx, ctx->Depth.Clear ); |
||
| 56 | } |
||
| 57 | |||
| 58 | |||
| 59 | void GLAPIENTRY |
||
| 60 | _mesa_ClearDepthf( GLclampf depth ) |
||
| 61 | { |
||
| 62 | _mesa_ClearDepth(depth); |
||
| 63 | } |
||
| 64 | |||
| 65 | |||
| 66 | void GLAPIENTRY |
||
| 67 | _mesa_DepthFunc( GLenum func ) |
||
| 68 | { |
||
| 69 | GET_CURRENT_CONTEXT(ctx); |
||
| 70 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 71 | |||
| 72 | if (MESA_VERBOSE & VERBOSE_API) |
||
| 73 | _mesa_debug(ctx, "glDepthFunc %s\n", _mesa_lookup_enum_by_nr(func)); |
||
| 74 | |||
| 75 | switch (func) { |
||
| 76 | case GL_LESS: /* (default) pass if incoming z < stored z */ |
||
| 77 | case GL_GEQUAL: |
||
| 78 | case GL_LEQUAL: |
||
| 79 | case GL_GREATER: |
||
| 80 | case GL_NOTEQUAL: |
||
| 81 | case GL_EQUAL: |
||
| 82 | case GL_ALWAYS: |
||
| 83 | case GL_NEVER: |
||
| 84 | break; |
||
| 85 | default: |
||
| 86 | _mesa_error( ctx, GL_INVALID_ENUM, "glDepth.Func" ); |
||
| 87 | return; |
||
| 88 | } |
||
| 89 | |||
| 90 | if (ctx->Depth.Func == func) |
||
| 91 | return; |
||
| 92 | |||
| 93 | FLUSH_VERTICES(ctx, _NEW_DEPTH); |
||
| 94 | ctx->Depth.Func = func; |
||
| 95 | |||
| 96 | if (ctx->Driver.DepthFunc) |
||
| 97 | ctx->Driver.DepthFunc( ctx, func ); |
||
| 98 | } |
||
| 99 | |||
| 100 | |||
| 101 | |||
| 102 | void GLAPIENTRY |
||
| 103 | _mesa_DepthMask( GLboolean flag ) |
||
| 104 | { |
||
| 105 | GET_CURRENT_CONTEXT(ctx); |
||
| 106 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 107 | |||
| 108 | if (MESA_VERBOSE & VERBOSE_API) |
||
| 109 | _mesa_debug(ctx, "glDepthMask %d\n", flag); |
||
| 110 | |||
| 111 | /* |
||
| 112 | * GL_TRUE indicates depth buffer writing is enabled (default) |
||
| 113 | * GL_FALSE indicates depth buffer writing is disabled |
||
| 114 | */ |
||
| 115 | if (ctx->Depth.Mask == flag) |
||
| 116 | return; |
||
| 117 | |||
| 118 | FLUSH_VERTICES(ctx, _NEW_DEPTH); |
||
| 119 | ctx->Depth.Mask = flag; |
||
| 120 | |||
| 121 | if (ctx->Driver.DepthMask) |
||
| 122 | ctx->Driver.DepthMask( ctx, flag ); |
||
| 123 | } |
||
| 124 | |||
| 125 | |||
| 126 | |||
| 127 | /** |
||
| 128 | * Specified by the GL_EXT_depth_bounds_test extension. |
||
| 129 | */ |
||
| 130 | void GLAPIENTRY |
||
| 131 | _mesa_DepthBoundsEXT( GLclampd zmin, GLclampd zmax ) |
||
| 132 | { |
||
| 133 | GET_CURRENT_CONTEXT(ctx); |
||
| 134 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 135 | |||
| 136 | if (zmin > zmax) { |
||
| 137 | _mesa_error(ctx, GL_INVALID_VALUE, "glDepthBoundsEXT(zmin > zmax)"); |
||
| 138 | return; |
||
| 139 | } |
||
| 140 | |||
| 141 | zmin = CLAMP(zmin, 0.0, 1.0); |
||
| 142 | zmax = CLAMP(zmax, 0.0, 1.0); |
||
| 143 | |||
| 144 | if (ctx->Depth.BoundsMin == zmin && ctx->Depth.BoundsMax == zmax) |
||
| 145 | return; |
||
| 146 | |||
| 147 | FLUSH_VERTICES(ctx, _NEW_DEPTH); |
||
| 148 | ctx->Depth.BoundsMin = (GLfloat) zmin; |
||
| 149 | ctx->Depth.BoundsMax = (GLfloat) zmax; |
||
| 150 | } |
||
| 151 | |||
| 152 | |||
| 153 | /**********************************************************************/ |
||
| 154 | /***** Initialization *****/ |
||
| 155 | /**********************************************************************/ |
||
| 156 | |||
| 157 | |||
| 158 | /** |
||
| 159 | * Initialize the depth buffer attribute group in the given context. |
||
| 160 | */ |
||
| 161 | void |
||
| 162 | _mesa_init_depth(struct gl_context *ctx) |
||
| 163 | { |
||
| 164 | ctx->Depth.Test = GL_FALSE; |
||
| 165 | ctx->Depth.Clear = 1.0; |
||
| 166 | ctx->Depth.Func = GL_LESS; |
||
| 167 | ctx->Depth.Mask = GL_TRUE; |
||
| 168 | } |