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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | /* $Id: points.c,v 1.1 2003-02-28 11:42:04 pj Exp $ */ |
| 2 | |||
| 3 | /* |
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| 4 | * Mesa 3-D graphics library |
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| 5 | * Version: 4.1 |
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| 6 | * |
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| 7 | * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. |
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| 8 | * |
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 10 | * copy of this software and associated documentation files (the "Software"), |
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| 11 | * to deal in the Software without restriction, including without limitation |
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 14 | * Software is furnished to do so, subject to the following conditions: |
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| 15 | * |
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| 16 | * The above copyright notice and this permission notice shall be included |
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| 17 | * in all copies or substantial portions of the Software. |
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| 18 | * |
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | */ |
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| 26 | |||
| 27 | |||
| 28 | #include "glheader.h" |
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| 29 | #include "context.h" |
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| 30 | #include "macros.h" |
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| 31 | #include "mmath.h" |
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| 32 | #include "points.h" |
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| 33 | #include "texstate.h" |
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| 34 | #include "mtypes.h" |
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| 35 | |||
| 36 | |||
| 37 | |||
| 38 | void |
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| 39 | _mesa_PointSize( GLfloat size ) |
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| 40 | { |
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| 41 | GET_CURRENT_CONTEXT(ctx); |
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| 42 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 43 | |||
| 44 | if (size <= 0.0) { |
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| 45 | _mesa_error( ctx, GL_INVALID_VALUE, "glPointSize" ); |
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| 46 | return; |
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| 47 | } |
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| 48 | |||
| 49 | if (ctx->Point.Size == size) |
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| 50 | return; |
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| 51 | |||
| 52 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 53 | ctx->Point.Size = size; |
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| 54 | ctx->Point._Size = CLAMP(size, |
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| 55 | ctx->Const.MinPointSize, |
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| 56 | ctx->Const.MaxPointSize); |
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| 57 | |||
| 58 | if (ctx->Point._Size == 1.0F) |
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| 59 | ctx->_TriangleCaps &= ~DD_POINT_SIZE; |
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| 60 | else |
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| 61 | ctx->_TriangleCaps |= DD_POINT_SIZE; |
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| 62 | |||
| 63 | if (ctx->Driver.PointSize) |
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| 64 | (*ctx->Driver.PointSize)(ctx, size); |
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| 65 | } |
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| 66 | |||
| 67 | |||
| 68 | |||
| 69 | /* |
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| 70 | * Added by GL_NV_point_sprite |
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| 71 | */ |
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| 72 | void |
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| 73 | _mesa_PointParameteriNV( GLenum pname, GLint param ) |
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| 74 | { |
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| 75 | const GLfloat value = (GLfloat) param; |
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| 76 | _mesa_PointParameterfvEXT(pname, &value); |
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| 77 | } |
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| 78 | |||
| 79 | |||
| 80 | /* |
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| 81 | * Added by GL_NV_point_sprite |
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| 82 | */ |
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| 83 | void |
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| 84 | _mesa_PointParameterivNV( GLenum pname, const GLint *params ) |
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| 85 | { |
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| 86 | const GLfloat value = (GLfloat) params[0]; |
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| 87 | _mesa_PointParameterfvEXT(pname, &value); |
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| 88 | } |
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| 89 | |||
| 90 | |||
| 91 | |||
| 92 | /* |
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| 93 | * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters. |
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| 94 | */ |
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| 95 | void |
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| 96 | _mesa_PointParameterfEXT( GLenum pname, GLfloat param) |
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| 97 | { |
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| 98 | _mesa_PointParameterfvEXT(pname, ¶m); |
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| 99 | } |
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| 100 | |||
| 101 | |||
| 102 | |||
| 103 | /* |
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| 104 | * Same for both GL_EXT_point_parameters and GL_ARB_point_parameters. |
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| 105 | */ |
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| 106 | void |
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| 107 | _mesa_PointParameterfvEXT( GLenum pname, const GLfloat *params) |
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| 108 | { |
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| 109 | GET_CURRENT_CONTEXT(ctx); |
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| 110 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 111 | |||
| 112 | switch (pname) { |
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| 113 | case GL_DISTANCE_ATTENUATION_EXT: |
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| 114 | if (ctx->Extensions.EXT_point_parameters) { |
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| 115 | const GLboolean tmp = ctx->Point._Attenuated; |
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| 116 | if (TEST_EQ_3V(ctx->Point.Params, params)) |
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| 117 | return; |
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| 118 | |||
| 119 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 120 | COPY_3V(ctx->Point.Params, params); |
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| 121 | |||
| 122 | /* Update several derived values now. This likely to be |
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| 123 | * more efficient than trying to catch this statechange in |
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| 124 | * state.c. |
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| 125 | */ |
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| 126 | ctx->Point._Attenuated = (params[0] != 1.0 || |
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| 127 | params[1] != 0.0 || |
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| 128 | params[2] != 0.0); |
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| 129 | |||
| 130 | if (tmp != ctx->Point._Attenuated) { |
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| 131 | ctx->_TriangleCaps ^= DD_POINT_ATTEN; |
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| 132 | ctx->_NeedEyeCoords ^= NEED_EYE_POINT_ATTEN; |
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| 133 | } |
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| 134 | } |
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| 135 | else { |
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| 136 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 137 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 138 | return; |
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| 139 | } |
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| 140 | break; |
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| 141 | case GL_POINT_SIZE_MIN_EXT: |
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| 142 | if (ctx->Extensions.EXT_point_parameters) { |
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| 143 | if (params[0] < 0.0F) { |
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| 144 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 145 | "glPointParameterf[v]{EXT,ARB}(param)" ); |
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| 146 | return; |
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| 147 | } |
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| 148 | if (ctx->Point.MinSize == params[0]) |
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| 149 | return; |
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| 150 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 151 | ctx->Point.MinSize = params[0]; |
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| 152 | } |
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| 153 | else { |
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| 154 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 155 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 156 | return; |
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| 157 | } |
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| 158 | break; |
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| 159 | case GL_POINT_SIZE_MAX_EXT: |
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| 160 | if (ctx->Extensions.EXT_point_parameters) { |
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| 161 | if (params[0] < 0.0F) { |
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| 162 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 163 | "glPointParameterf[v]{EXT,ARB}(param)" ); |
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| 164 | return; |
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| 165 | } |
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| 166 | if (ctx->Point.MaxSize == params[0]) |
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| 167 | return; |
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| 168 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 169 | ctx->Point.MaxSize = params[0]; |
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| 170 | } |
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| 171 | else { |
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| 172 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 173 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 174 | return; |
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| 175 | } |
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| 176 | break; |
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| 177 | case GL_POINT_FADE_THRESHOLD_SIZE_EXT: |
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| 178 | if (ctx->Extensions.EXT_point_parameters) { |
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| 179 | if (params[0] < 0.0F) { |
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| 180 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 181 | "glPointParameterf[v]{EXT,ARB}(param)" ); |
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| 182 | return; |
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| 183 | } |
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| 184 | if (ctx->Point.Threshold == params[0]) |
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| 185 | return; |
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| 186 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 187 | ctx->Point.Threshold = params[0]; |
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| 188 | } |
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| 189 | else { |
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| 190 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 191 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 192 | return; |
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| 193 | } |
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| 194 | break; |
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| 195 | case GL_POINT_SPRITE_R_MODE_NV: |
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| 196 | if (ctx->Extensions.NV_point_sprite) { |
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| 197 | GLenum value = (GLenum) params[0]; |
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| 198 | if (value != GL_ZERO && value != GL_S && value != GL_R) { |
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| 199 | _mesa_error(ctx, GL_INVALID_VALUE, |
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| 200 | "glPointParameterf[v]{EXT,ARB}(param)"); |
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| 201 | return; |
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| 202 | } |
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| 203 | if (ctx->Point.SpriteRMode == value) |
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| 204 | return; |
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| 205 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 206 | ctx->Point.SpriteRMode = value; |
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| 207 | } |
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| 208 | else { |
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| 209 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 210 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 211 | return; |
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| 212 | } |
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| 213 | break; |
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| 214 | default: |
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| 215 | _mesa_error( ctx, GL_INVALID_ENUM, |
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| 216 | "glPointParameterf[v]{EXT,ARB}(pname)" ); |
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| 217 | return; |
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| 218 | } |
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| 219 | |||
| 220 | if (ctx->Driver.PointParameterfv) |
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| 221 | (*ctx->Driver.PointParameterfv)(ctx, pname, params); |
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| 222 | } |