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| Rev | Author | Line No. | Line |
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| 1901 | serge | 1 | /** |
| 2 | * \file points.c |
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| 3 | * Point 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 | * Version: 7.1 |
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| 9 | * |
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| 10 | * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
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| 11 | * |
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| 12 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 13 | * copy of this software and associated documentation files (the "Software"), |
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| 14 | * to deal in the Software without restriction, including without limitation |
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| 15 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 16 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 17 | * Software is furnished to do so, subject to the following conditions: |
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| 18 | * |
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| 19 | * The above copyright notice and this permission notice shall be included |
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| 20 | * in all copies or substantial portions of the Software. |
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| 21 | * |
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| 22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 23 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 25 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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| 26 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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| 27 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 28 | */ |
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| 29 | |||
| 30 | |||
| 31 | #include "glheader.h" |
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| 32 | #include "context.h" |
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| 33 | #include "macros.h" |
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| 34 | #include "points.h" |
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| 35 | #include "mtypes.h" |
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| 36 | |||
| 37 | |||
| 38 | /** |
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| 39 | * Set current point size. |
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| 40 | * \param size point diameter in pixels |
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| 41 | * \sa glPointSize(). |
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| 42 | */ |
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| 43 | void GLAPIENTRY |
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| 44 | _mesa_PointSize( GLfloat size ) |
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| 45 | { |
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| 46 | GET_CURRENT_CONTEXT(ctx); |
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| 47 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 48 | |||
| 49 | if (size <= 0.0) { |
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| 50 | _mesa_error( ctx, GL_INVALID_VALUE, "glPointSize" ); |
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| 51 | return; |
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| 52 | } |
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| 53 | |||
| 54 | if (ctx->Point.Size == size) |
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| 55 | return; |
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| 56 | |||
| 57 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 58 | ctx->Point.Size = size; |
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| 59 | |||
| 60 | if (ctx->Driver.PointSize) |
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| 61 | ctx->Driver.PointSize(ctx, size); |
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| 62 | } |
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| 63 | |||
| 64 | |||
| 65 | #if _HAVE_FULL_GL |
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| 66 | |||
| 67 | |||
| 68 | void GLAPIENTRY |
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| 69 | _mesa_PointParameteri( GLenum pname, GLint param ) |
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| 70 | { |
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| 71 | GLfloat p[3]; |
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| 72 | p[0] = (GLfloat) param; |
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| 73 | p[1] = p[2] = 0.0F; |
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| 74 | _mesa_PointParameterfv(pname, p); |
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| 75 | } |
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| 76 | |||
| 77 | |||
| 78 | void GLAPIENTRY |
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| 79 | _mesa_PointParameteriv( GLenum pname, const GLint *params ) |
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| 80 | { |
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| 81 | GLfloat p[3]; |
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| 82 | p[0] = (GLfloat) params[0]; |
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| 83 | if (pname == GL_DISTANCE_ATTENUATION_EXT) { |
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| 84 | p[1] = (GLfloat) params[1]; |
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| 85 | p[2] = (GLfloat) params[2]; |
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| 86 | } |
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| 87 | _mesa_PointParameterfv(pname, p); |
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| 88 | } |
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| 89 | |||
| 90 | |||
| 91 | void GLAPIENTRY |
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| 92 | _mesa_PointParameterf( GLenum pname, GLfloat param) |
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| 93 | { |
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| 94 | GLfloat p[3]; |
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| 95 | p[0] = param; |
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| 96 | p[1] = p[2] = 0.0F; |
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| 97 | _mesa_PointParameterfv(pname, p); |
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| 98 | } |
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| 99 | |||
| 100 | |||
| 101 | void GLAPIENTRY |
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| 102 | _mesa_PointParameterfv( GLenum pname, const GLfloat *params) |
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| 103 | { |
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| 104 | GET_CURRENT_CONTEXT(ctx); |
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| 105 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 106 | |||
| 107 | switch (pname) { |
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| 108 | case GL_DISTANCE_ATTENUATION_EXT: |
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| 109 | if (ctx->Extensions.EXT_point_parameters) { |
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| 110 | if (TEST_EQ_3V(ctx->Point.Params, params)) |
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| 111 | return; |
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| 112 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 113 | COPY_3V(ctx->Point.Params, params); |
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| 114 | ctx->Point._Attenuated = (ctx->Point.Params[0] != 1.0 || |
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| 115 | ctx->Point.Params[1] != 0.0 || |
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| 116 | ctx->Point.Params[2] != 0.0); |
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| 117 | |||
| 118 | if (ctx->Point._Attenuated) |
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| 119 | ctx->_TriangleCaps |= DD_POINT_ATTEN; |
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| 120 | else |
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| 121 | ctx->_TriangleCaps &= ~DD_POINT_ATTEN; |
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| 122 | } |
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| 123 | else { |
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| 124 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 125 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 126 | return; |
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| 127 | } |
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| 128 | break; |
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| 129 | case GL_POINT_SIZE_MIN_EXT: |
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| 130 | if (ctx->Extensions.EXT_point_parameters) { |
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| 131 | if (params[0] < 0.0F) { |
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| 132 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 133 | "glPointParameterf[v]{EXT,ARB}(param)" ); |
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| 134 | return; |
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| 135 | } |
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| 136 | if (ctx->Point.MinSize == params[0]) |
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| 137 | return; |
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| 138 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 139 | ctx->Point.MinSize = params[0]; |
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| 140 | } |
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| 141 | else { |
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| 142 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 143 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 144 | return; |
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| 145 | } |
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| 146 | break; |
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| 147 | case GL_POINT_SIZE_MAX_EXT: |
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| 148 | if (ctx->Extensions.EXT_point_parameters) { |
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| 149 | if (params[0] < 0.0F) { |
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| 150 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 151 | "glPointParameterf[v]{EXT,ARB}(param)" ); |
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| 152 | return; |
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| 153 | } |
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| 154 | if (ctx->Point.MaxSize == params[0]) |
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| 155 | return; |
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| 156 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 157 | ctx->Point.MaxSize = params[0]; |
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| 158 | } |
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| 159 | else { |
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| 160 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 161 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 162 | return; |
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| 163 | } |
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| 164 | break; |
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| 165 | case GL_POINT_FADE_THRESHOLD_SIZE_EXT: |
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| 166 | if (ctx->Extensions.EXT_point_parameters) { |
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| 167 | if (params[0] < 0.0F) { |
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| 168 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 169 | "glPointParameterf[v]{EXT,ARB}(param)" ); |
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| 170 | return; |
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| 171 | } |
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| 172 | if (ctx->Point.Threshold == params[0]) |
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| 173 | return; |
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| 174 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 175 | ctx->Point.Threshold = params[0]; |
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| 176 | } |
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| 177 | else { |
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| 178 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 179 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 180 | return; |
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| 181 | } |
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| 182 | break; |
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| 183 | case GL_POINT_SPRITE_R_MODE_NV: |
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| 184 | /* This is one area where ARB_point_sprite and NV_point_sprite |
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| 185 | * differ. In ARB_point_sprite the POINT_SPRITE_R_MODE is |
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| 186 | * always ZERO. NV_point_sprite adds the S and R modes. |
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| 187 | */ |
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| 188 | if (ctx->Extensions.NV_point_sprite) { |
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| 189 | GLenum value = (GLenum) params[0]; |
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| 190 | if (value != GL_ZERO && value != GL_S && value != GL_R) { |
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| 191 | _mesa_error(ctx, GL_INVALID_VALUE, |
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| 192 | "glPointParameterf[v]{EXT,ARB}(param)"); |
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| 193 | return; |
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| 194 | } |
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| 195 | if (ctx->Point.SpriteRMode == value) |
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| 196 | return; |
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| 197 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 198 | ctx->Point.SpriteRMode = value; |
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| 199 | } |
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| 200 | else { |
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| 201 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 202 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 203 | return; |
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| 204 | } |
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| 205 | break; |
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| 206 | case GL_POINT_SPRITE_COORD_ORIGIN: |
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| 207 | /* This is not completely correct. GL_POINT_SPRITE_COORD_ORIGIN was |
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| 208 | * added to point sprites when the extension was merged into OpenGL |
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| 209 | * 2.0. It is expected that an implementation supporting OpenGL 1.4 |
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| 210 | * and GL_ARB_point_sprite will generate an error here. |
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| 211 | */ |
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| 212 | if (ctx->Extensions.ARB_point_sprite) { |
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| 213 | GLenum value = (GLenum) params[0]; |
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| 214 | if (value != GL_LOWER_LEFT && value != GL_UPPER_LEFT) { |
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| 215 | _mesa_error(ctx, GL_INVALID_VALUE, |
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| 216 | "glPointParameterf[v]{EXT,ARB}(param)"); |
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| 217 | return; |
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| 218 | } |
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| 219 | if (ctx->Point.SpriteOrigin == value) |
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| 220 | return; |
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| 221 | FLUSH_VERTICES(ctx, _NEW_POINT); |
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| 222 | ctx->Point.SpriteOrigin = value; |
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| 223 | } |
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| 224 | else { |
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| 225 | _mesa_error(ctx, GL_INVALID_ENUM, |
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| 226 | "glPointParameterf[v]{EXT,ARB}(pname)"); |
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| 227 | return; |
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| 228 | } |
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| 229 | break; |
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| 230 | default: |
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| 231 | _mesa_error( ctx, GL_INVALID_ENUM, |
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| 232 | "glPointParameterf[v]{EXT,ARB}(pname)" ); |
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| 233 | return; |
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| 234 | } |
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| 235 | |||
| 236 | if (ctx->Driver.PointParameterfv) |
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| 237 | (*ctx->Driver.PointParameterfv)(ctx, pname, params); |
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| 238 | } |
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| 239 | #endif |
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| 240 | |||
| 241 | |||
| 242 | |||
| 243 | /** |
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| 244 | * Initialize the context point state. |
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| 245 | * |
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| 246 | * \param ctx GL context. |
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| 247 | * |
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| 248 | * Initializes __struct gl_contextRec::Point and point related constants in |
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| 249 | * __struct gl_contextRec::Const. |
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| 250 | */ |
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| 251 | void |
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| 252 | _mesa_init_point(struct gl_context *ctx) |
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| 253 | { |
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| 254 | GLuint i; |
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| 255 | |||
| 256 | ctx->Point.SmoothFlag = GL_FALSE; |
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| 257 | ctx->Point.Size = 1.0; |
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| 258 | ctx->Point.Params[0] = 1.0; |
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| 259 | ctx->Point.Params[1] = 0.0; |
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| 260 | ctx->Point.Params[2] = 0.0; |
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| 261 | ctx->Point._Attenuated = GL_FALSE; |
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| 262 | ctx->Point.MinSize = 0.0; |
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| 263 | ctx->Point.MaxSize |
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| 264 | = MAX2(ctx->Const.MaxPointSize, ctx->Const.MaxPointSizeAA); |
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| 265 | ctx->Point.Threshold = 1.0; |
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| 266 | ctx->Point.PointSprite = GL_FALSE; /* GL_ARB/NV_point_sprite */ |
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| 267 | ctx->Point.SpriteRMode = GL_ZERO; /* GL_NV_point_sprite (only!) */ |
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| 268 | ctx->Point.SpriteOrigin = GL_UPPER_LEFT; /* GL_ARB_point_sprite */ |
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| 269 | for (i = 0; i < Elements(ctx->Point.CoordReplace); i++) { |
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| 270 | ctx->Point.CoordReplace[i] = GL_FALSE; /* GL_ARB/NV_point_sprite */ |
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| 271 | } |
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| 272 | } |