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1901 | serge | 1 | /* |
2 | * Mesa 3-D graphics library |
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3 | * Version: 7.5 |
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4 | * |
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5 | * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. |
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6 | * Copyright (C) 2009 VMware, Inc. All Rights Reserved. |
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7 | * |
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8 | * Permission is hereby granted, free of charge, to any person obtaining a |
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9 | * copy of this software and associated documentation files (the "Software"), |
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10 | * to deal in the Software without restriction, including without limitation |
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11 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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12 | * and/or sell copies of the Software, and to permit persons to whom the |
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13 | * Software is furnished to do so, subject to the following conditions: |
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14 | * |
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15 | * The above copyright notice and this permission notice shall be included |
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16 | * in all copies or substantial portions of the Software. |
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17 | * |
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18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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20 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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21 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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22 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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23 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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24 | */ |
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25 | |||
26 | |||
27 | /** |
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28 | * \file matrix.c |
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29 | * Matrix operations. |
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30 | * |
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31 | * \note |
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32 | * -# 4x4 transformation matrices are stored in memory in column major order. |
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33 | * -# Points/vertices are to be thought of as column vectors. |
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34 | * -# Transformation of a point p by a matrix M is: p' = M * p |
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35 | */ |
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36 | |||
37 | |||
38 | #include "glheader.h" |
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39 | #include "imports.h" |
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40 | #include "context.h" |
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41 | #include "enums.h" |
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42 | #include "macros.h" |
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43 | #include "matrix.h" |
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44 | #include "mtypes.h" |
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45 | #include "math/m_matrix.h" |
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46 | |||
47 | |||
48 | /** |
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49 | * Apply a perspective projection matrix. |
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50 | * |
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51 | * \param left left clipping plane coordinate. |
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52 | * \param right right clipping plane coordinate. |
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53 | * \param bottom bottom clipping plane coordinate. |
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54 | * \param top top clipping plane coordinate. |
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55 | * \param nearval distance to the near clipping plane. |
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56 | * \param farval distance to the far clipping plane. |
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57 | * |
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58 | * \sa glFrustum(). |
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59 | * |
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60 | * Flushes vertices and validates parameters. Calls _math_matrix_frustum() with |
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61 | * the top matrix of the current matrix stack and sets |
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62 | * __struct gl_contextRec::NewState. |
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63 | */ |
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64 | void GLAPIENTRY |
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65 | _mesa_Frustum( GLdouble left, GLdouble right, |
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66 | GLdouble bottom, GLdouble top, |
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67 | GLdouble nearval, GLdouble farval ) |
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68 | { |
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69 | GET_CURRENT_CONTEXT(ctx); |
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70 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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71 | |||
72 | if (nearval <= 0.0 || |
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73 | farval <= 0.0 || |
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74 | nearval == farval || |
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75 | left == right || |
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76 | top == bottom) |
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77 | { |
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78 | _mesa_error( ctx, GL_INVALID_VALUE, "glFrustum" ); |
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79 | return; |
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80 | } |
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81 | |||
82 | _math_matrix_frustum( ctx->CurrentStack->Top, |
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83 | (GLfloat) left, (GLfloat) right, |
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84 | (GLfloat) bottom, (GLfloat) top, |
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85 | (GLfloat) nearval, (GLfloat) farval ); |
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86 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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87 | } |
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88 | |||
89 | |||
90 | /** |
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91 | * Apply an orthographic projection matrix. |
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92 | * |
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93 | * \param left left clipping plane coordinate. |
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94 | * \param right right clipping plane coordinate. |
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95 | * \param bottom bottom clipping plane coordinate. |
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96 | * \param top top clipping plane coordinate. |
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97 | * \param nearval distance to the near clipping plane. |
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98 | * \param farval distance to the far clipping plane. |
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99 | * |
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100 | * \sa glOrtho(). |
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101 | * |
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102 | * Flushes vertices and validates parameters. Calls _math_matrix_ortho() with |
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103 | * the top matrix of the current matrix stack and sets |
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104 | * __struct gl_contextRec::NewState. |
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105 | */ |
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106 | void GLAPIENTRY |
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107 | _mesa_Ortho( GLdouble left, GLdouble right, |
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108 | GLdouble bottom, GLdouble top, |
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109 | GLdouble nearval, GLdouble farval ) |
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110 | { |
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111 | GET_CURRENT_CONTEXT(ctx); |
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112 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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113 | |||
114 | if (MESA_VERBOSE & VERBOSE_API) |
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115 | _mesa_debug(ctx, "glOrtho(%f, %f, %f, %f, %f, %f)\n", |
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116 | left, right, bottom, top, nearval, farval); |
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117 | |||
118 | if (left == right || |
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119 | bottom == top || |
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120 | nearval == farval) |
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121 | { |
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122 | _mesa_error( ctx, GL_INVALID_VALUE, "glOrtho" ); |
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123 | return; |
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124 | } |
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125 | |||
126 | _math_matrix_ortho( ctx->CurrentStack->Top, |
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127 | (GLfloat) left, (GLfloat) right, |
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128 | (GLfloat) bottom, (GLfloat) top, |
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129 | (GLfloat) nearval, (GLfloat) farval ); |
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130 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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131 | } |
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132 | |||
133 | |||
134 | /** |
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135 | * Set the current matrix stack. |
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136 | * |
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137 | * \param mode matrix stack. |
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138 | * |
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139 | * \sa glMatrixMode(). |
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140 | * |
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141 | * Flushes the vertices, validates the parameter and updates |
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142 | * __struct gl_contextRec::CurrentStack and gl_transform_attrib::MatrixMode with the |
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143 | * specified matrix stack. |
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144 | */ |
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145 | void GLAPIENTRY |
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146 | _mesa_MatrixMode( GLenum mode ) |
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147 | { |
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148 | GET_CURRENT_CONTEXT(ctx); |
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149 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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150 | |||
151 | if (ctx->Transform.MatrixMode == mode && mode != GL_TEXTURE) |
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152 | return; |
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153 | FLUSH_VERTICES(ctx, _NEW_TRANSFORM); |
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154 | |||
155 | switch (mode) { |
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156 | case GL_MODELVIEW: |
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157 | ctx->CurrentStack = &ctx->ModelviewMatrixStack; |
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158 | break; |
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159 | case GL_PROJECTION: |
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160 | ctx->CurrentStack = &ctx->ProjectionMatrixStack; |
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161 | break; |
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162 | case GL_TEXTURE: |
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163 | /* This error check is disabled because if we're called from |
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164 | * glPopAttrib() when the active texture unit is >= MaxTextureCoordUnits |
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165 | * we'll generate an unexpected error. |
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166 | * From the GL_ARB_vertex_shader spec it sounds like we should instead |
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167 | * do error checking in other places when we actually try to access |
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168 | * texture matrices beyond MaxTextureCoordUnits. |
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169 | */ |
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170 | #if 0 |
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171 | if (ctx->Texture.CurrentUnit >= ctx->Const.MaxTextureCoordUnits) { |
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172 | _mesa_error(ctx, GL_INVALID_OPERATION, "glMatrixMode(invalid tex unit %d)", |
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173 | ctx->Texture.CurrentUnit); |
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174 | return; |
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175 | } |
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176 | #endif |
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177 | ASSERT(ctx->Texture.CurrentUnit < Elements(ctx->TextureMatrixStack)); |
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178 | ctx->CurrentStack = &ctx->TextureMatrixStack[ctx->Texture.CurrentUnit]; |
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179 | break; |
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180 | case GL_MATRIX0_NV: |
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181 | case GL_MATRIX1_NV: |
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182 | case GL_MATRIX2_NV: |
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183 | case GL_MATRIX3_NV: |
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184 | case GL_MATRIX4_NV: |
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185 | case GL_MATRIX5_NV: |
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186 | case GL_MATRIX6_NV: |
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187 | case GL_MATRIX7_NV: |
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188 | if (ctx->Extensions.NV_vertex_program) { |
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189 | ctx->CurrentStack = &ctx->ProgramMatrixStack[mode - GL_MATRIX0_NV]; |
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190 | } |
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191 | else { |
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192 | _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" ); |
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193 | return; |
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194 | } |
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195 | break; |
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196 | case GL_MATRIX0_ARB: |
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197 | case GL_MATRIX1_ARB: |
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198 | case GL_MATRIX2_ARB: |
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199 | case GL_MATRIX3_ARB: |
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200 | case GL_MATRIX4_ARB: |
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201 | case GL_MATRIX5_ARB: |
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202 | case GL_MATRIX6_ARB: |
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203 | case GL_MATRIX7_ARB: |
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204 | if (ctx->Extensions.ARB_vertex_program || |
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205 | ctx->Extensions.ARB_fragment_program) { |
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206 | const GLuint m = mode - GL_MATRIX0_ARB; |
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207 | if (m > ctx->Const.MaxProgramMatrices) { |
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208 | _mesa_error(ctx, GL_INVALID_ENUM, |
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209 | "glMatrixMode(GL_MATRIX%d_ARB)", m); |
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210 | return; |
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211 | } |
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212 | ctx->CurrentStack = &ctx->ProgramMatrixStack[m]; |
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213 | } |
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214 | else { |
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215 | _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" ); |
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216 | return; |
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217 | } |
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218 | break; |
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219 | default: |
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220 | _mesa_error( ctx, GL_INVALID_ENUM, "glMatrixMode(mode)" ); |
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221 | return; |
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222 | } |
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223 | |||
224 | ctx->Transform.MatrixMode = mode; |
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225 | } |
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226 | |||
227 | |||
228 | /** |
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229 | * Push the current matrix stack. |
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230 | * |
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231 | * \sa glPushMatrix(). |
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232 | * |
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233 | * Verifies the current matrix stack is not full, and duplicates the top-most |
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234 | * matrix in the stack. Marks __struct gl_contextRec::NewState with the stack dirty |
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235 | * flag. |
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236 | */ |
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237 | void GLAPIENTRY |
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238 | _mesa_PushMatrix( void ) |
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239 | { |
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240 | GET_CURRENT_CONTEXT(ctx); |
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241 | struct gl_matrix_stack *stack = ctx->CurrentStack; |
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242 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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243 | |||
244 | if (MESA_VERBOSE&VERBOSE_API) |
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245 | _mesa_debug(ctx, "glPushMatrix %s\n", |
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246 | _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode)); |
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247 | |||
248 | if (stack->Depth + 1 >= stack->MaxDepth) { |
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249 | if (ctx->Transform.MatrixMode == GL_TEXTURE) { |
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250 | _mesa_error(ctx, GL_STACK_OVERFLOW, |
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251 | "glPushMatrix(mode=GL_TEXTURE, unit=%d)", |
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252 | ctx->Texture.CurrentUnit); |
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253 | } |
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254 | else { |
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255 | _mesa_error(ctx, GL_STACK_OVERFLOW, "glPushMatrix(mode=%s)", |
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256 | _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode)); |
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257 | } |
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258 | return; |
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259 | } |
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260 | _math_matrix_copy( &stack->Stack[stack->Depth + 1], |
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261 | &stack->Stack[stack->Depth] ); |
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262 | stack->Depth++; |
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263 | stack->Top = &(stack->Stack[stack->Depth]); |
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264 | ctx->NewState |= stack->DirtyFlag; |
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265 | } |
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266 | |||
267 | |||
268 | /** |
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269 | * Pop the current matrix stack. |
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270 | * |
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271 | * \sa glPopMatrix(). |
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272 | * |
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273 | * Flushes the vertices, verifies the current matrix stack is not empty, and |
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274 | * moves the stack head down. Marks __struct gl_contextRec::NewState with the dirty |
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275 | * stack flag. |
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276 | */ |
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277 | void GLAPIENTRY |
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278 | _mesa_PopMatrix( void ) |
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279 | { |
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280 | GET_CURRENT_CONTEXT(ctx); |
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281 | struct gl_matrix_stack *stack = ctx->CurrentStack; |
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282 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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283 | |||
284 | if (MESA_VERBOSE&VERBOSE_API) |
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285 | _mesa_debug(ctx, "glPopMatrix %s\n", |
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286 | _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode)); |
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287 | |||
288 | if (stack->Depth == 0) { |
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289 | if (ctx->Transform.MatrixMode == GL_TEXTURE) { |
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290 | _mesa_error(ctx, GL_STACK_UNDERFLOW, |
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291 | "glPopMatrix(mode=GL_TEXTURE, unit=%d)", |
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292 | ctx->Texture.CurrentUnit); |
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293 | } |
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294 | else { |
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295 | _mesa_error(ctx, GL_STACK_UNDERFLOW, "glPopMatrix(mode=%s)", |
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296 | _mesa_lookup_enum_by_nr(ctx->Transform.MatrixMode)); |
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297 | } |
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298 | return; |
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299 | } |
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300 | stack->Depth--; |
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301 | stack->Top = &(stack->Stack[stack->Depth]); |
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302 | ctx->NewState |= stack->DirtyFlag; |
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303 | } |
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304 | |||
305 | |||
306 | /** |
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307 | * Replace the current matrix with the identity matrix. |
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308 | * |
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309 | * \sa glLoadIdentity(). |
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310 | * |
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311 | * Flushes the vertices and calls _math_matrix_set_identity() with the top-most |
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312 | * matrix in the current stack. Marks __struct gl_contextRec::NewState with the stack |
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313 | * dirty flag. |
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314 | */ |
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315 | void GLAPIENTRY |
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316 | _mesa_LoadIdentity( void ) |
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317 | { |
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318 | GET_CURRENT_CONTEXT(ctx); |
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319 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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320 | |||
321 | if (MESA_VERBOSE & VERBOSE_API) |
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322 | _mesa_debug(ctx, "glLoadIdentity()\n"); |
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323 | |||
324 | _math_matrix_set_identity( ctx->CurrentStack->Top ); |
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325 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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326 | } |
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327 | |||
328 | |||
329 | /** |
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330 | * Replace the current matrix with a given matrix. |
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331 | * |
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332 | * \param m matrix. |
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333 | * |
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334 | * \sa glLoadMatrixf(). |
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335 | * |
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336 | * Flushes the vertices and calls _math_matrix_loadf() with the top-most matrix |
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337 | * in the current stack and the given matrix. Marks __struct gl_contextRec::NewState |
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338 | * with the dirty stack flag. |
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339 | */ |
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340 | void GLAPIENTRY |
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341 | _mesa_LoadMatrixf( const GLfloat *m ) |
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342 | { |
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343 | GET_CURRENT_CONTEXT(ctx); |
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344 | if (!m) return; |
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345 | if (MESA_VERBOSE & VERBOSE_API) |
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346 | _mesa_debug(ctx, |
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347 | "glLoadMatrix(%f %f %f %f, %f %f %f %f, %f %f %f %f, %f %f %f %f\n", |
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348 | m[0], m[4], m[8], m[12], |
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349 | m[1], m[5], m[9], m[13], |
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350 | m[2], m[6], m[10], m[14], |
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351 | m[3], m[7], m[11], m[15]); |
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352 | |||
353 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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354 | _math_matrix_loadf( ctx->CurrentStack->Top, m ); |
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355 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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356 | } |
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357 | |||
358 | |||
359 | /** |
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360 | * Multiply the current matrix with a given matrix. |
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361 | * |
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362 | * \param m matrix. |
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363 | * |
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364 | * \sa glMultMatrixf(). |
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365 | * |
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366 | * Flushes the vertices and calls _math_matrix_mul_floats() with the top-most |
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367 | * matrix in the current stack and the given matrix. Marks |
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368 | * __struct gl_contextRec::NewState with the dirty stack flag. |
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369 | */ |
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370 | void GLAPIENTRY |
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371 | _mesa_MultMatrixf( const GLfloat *m ) |
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372 | { |
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373 | GET_CURRENT_CONTEXT(ctx); |
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374 | if (!m) return; |
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375 | if (MESA_VERBOSE & VERBOSE_API) |
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376 | _mesa_debug(ctx, |
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377 | "glMultMatrix(%f %f %f %f, %f %f %f %f, %f %f %f %f, %f %f %f %f\n", |
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378 | m[0], m[4], m[8], m[12], |
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379 | m[1], m[5], m[9], m[13], |
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380 | m[2], m[6], m[10], m[14], |
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381 | m[3], m[7], m[11], m[15]); |
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382 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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383 | _math_matrix_mul_floats( ctx->CurrentStack->Top, m ); |
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384 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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385 | } |
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386 | |||
387 | |||
388 | /** |
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389 | * Multiply the current matrix with a rotation matrix. |
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390 | * |
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391 | * \param angle angle of rotation, in degrees. |
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392 | * \param x rotation vector x coordinate. |
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393 | * \param y rotation vector y coordinate. |
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394 | * \param z rotation vector z coordinate. |
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395 | * |
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396 | * \sa glRotatef(). |
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397 | * |
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398 | * Flushes the vertices and calls _math_matrix_rotate() with the top-most |
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399 | * matrix in the current stack and the given parameters. Marks |
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400 | * __struct gl_contextRec::NewState with the dirty stack flag. |
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401 | */ |
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402 | void GLAPIENTRY |
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403 | _mesa_Rotatef( GLfloat angle, GLfloat x, GLfloat y, GLfloat z ) |
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404 | { |
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405 | GET_CURRENT_CONTEXT(ctx); |
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406 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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407 | if (angle != 0.0F) { |
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408 | _math_matrix_rotate( ctx->CurrentStack->Top, angle, x, y, z); |
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409 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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410 | } |
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411 | } |
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412 | |||
413 | |||
414 | /** |
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415 | * Multiply the current matrix with a general scaling matrix. |
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416 | * |
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417 | * \param x x axis scale factor. |
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418 | * \param y y axis scale factor. |
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419 | * \param z z axis scale factor. |
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420 | * |
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421 | * \sa glScalef(). |
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422 | * |
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423 | * Flushes the vertices and calls _math_matrix_scale() with the top-most |
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424 | * matrix in the current stack and the given parameters. Marks |
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425 | * __struct gl_contextRec::NewState with the dirty stack flag. |
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426 | */ |
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427 | void GLAPIENTRY |
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428 | _mesa_Scalef( GLfloat x, GLfloat y, GLfloat z ) |
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429 | { |
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430 | GET_CURRENT_CONTEXT(ctx); |
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431 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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432 | _math_matrix_scale( ctx->CurrentStack->Top, x, y, z); |
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433 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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434 | } |
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435 | |||
436 | |||
437 | /** |
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438 | * Multiply the current matrix with a translation matrix. |
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439 | * |
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440 | * \param x translation vector x coordinate. |
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441 | * \param y translation vector y coordinate. |
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442 | * \param z translation vector z coordinate. |
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443 | * |
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444 | * \sa glTranslatef(). |
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445 | * |
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446 | * Flushes the vertices and calls _math_matrix_translate() with the top-most |
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447 | * matrix in the current stack and the given parameters. Marks |
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448 | * __struct gl_contextRec::NewState with the dirty stack flag. |
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449 | */ |
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450 | void GLAPIENTRY |
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451 | _mesa_Translatef( GLfloat x, GLfloat y, GLfloat z ) |
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452 | { |
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453 | GET_CURRENT_CONTEXT(ctx); |
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454 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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455 | _math_matrix_translate( ctx->CurrentStack->Top, x, y, z); |
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456 | ctx->NewState |= ctx->CurrentStack->DirtyFlag; |
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457 | } |
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458 | |||
459 | |||
460 | #if _HAVE_FULL_GL |
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461 | void GLAPIENTRY |
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462 | _mesa_LoadMatrixd( const GLdouble *m ) |
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463 | { |
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464 | GLint i; |
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465 | GLfloat f[16]; |
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466 | if (!m) return; |
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467 | for (i = 0; i < 16; i++) |
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468 | f[i] = (GLfloat) m[i]; |
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469 | _mesa_LoadMatrixf(f); |
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470 | } |
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471 | |||
472 | void GLAPIENTRY |
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473 | _mesa_MultMatrixd( const GLdouble *m ) |
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474 | { |
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475 | GLint i; |
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476 | GLfloat f[16]; |
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477 | if (!m) return; |
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478 | for (i = 0; i < 16; i++) |
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479 | f[i] = (GLfloat) m[i]; |
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480 | _mesa_MultMatrixf( f ); |
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481 | } |
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482 | |||
483 | |||
484 | void GLAPIENTRY |
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485 | _mesa_Rotated( GLdouble angle, GLdouble x, GLdouble y, GLdouble z ) |
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486 | { |
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487 | _mesa_Rotatef((GLfloat) angle, (GLfloat) x, (GLfloat) y, (GLfloat) z); |
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488 | } |
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489 | |||
490 | |||
491 | void GLAPIENTRY |
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492 | _mesa_Scaled( GLdouble x, GLdouble y, GLdouble z ) |
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493 | { |
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494 | _mesa_Scalef((GLfloat) x, (GLfloat) y, (GLfloat) z); |
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495 | } |
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496 | |||
497 | |||
498 | void GLAPIENTRY |
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499 | _mesa_Translated( GLdouble x, GLdouble y, GLdouble z ) |
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500 | { |
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501 | _mesa_Translatef((GLfloat) x, (GLfloat) y, (GLfloat) z); |
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502 | } |
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503 | #endif |
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504 | |||
505 | |||
506 | #if _HAVE_FULL_GL |
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507 | void GLAPIENTRY |
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508 | _mesa_LoadTransposeMatrixfARB( const GLfloat *m ) |
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509 | { |
||
510 | GLfloat tm[16]; |
||
511 | if (!m) return; |
||
512 | _math_transposef(tm, m); |
||
513 | _mesa_LoadMatrixf(tm); |
||
514 | } |
||
515 | |||
516 | |||
517 | void GLAPIENTRY |
||
518 | _mesa_LoadTransposeMatrixdARB( const GLdouble *m ) |
||
519 | { |
||
520 | GLfloat tm[16]; |
||
521 | if (!m) return; |
||
522 | _math_transposefd(tm, m); |
||
523 | _mesa_LoadMatrixf(tm); |
||
524 | } |
||
525 | |||
526 | |||
527 | void GLAPIENTRY |
||
528 | _mesa_MultTransposeMatrixfARB( const GLfloat *m ) |
||
529 | { |
||
530 | GLfloat tm[16]; |
||
531 | if (!m) return; |
||
532 | _math_transposef(tm, m); |
||
533 | _mesa_MultMatrixf(tm); |
||
534 | } |
||
535 | |||
536 | |||
537 | void GLAPIENTRY |
||
538 | _mesa_MultTransposeMatrixdARB( const GLdouble *m ) |
||
539 | { |
||
540 | GLfloat tm[16]; |
||
541 | if (!m) return; |
||
542 | _math_transposefd(tm, m); |
||
543 | _mesa_MultMatrixf(tm); |
||
544 | } |
||
545 | #endif |
||
546 | |||
547 | |||
548 | |||
549 | /**********************************************************************/ |
||
550 | /** \name State management */ |
||
551 | /*@{*/ |
||
552 | |||
553 | |||
554 | /** |
||
555 | * Update the projection matrix stack. |
||
556 | * |
||
557 | * \param ctx GL context. |
||
558 | * |
||
559 | * Calls _math_matrix_analyse() with the top-matrix of the projection matrix |
||
560 | * stack, and recomputes user clip positions if necessary. |
||
561 | * |
||
562 | * \note This routine references __struct gl_contextRec::Tranform attribute values to |
||
563 | * compute userclip positions in clip space, but is only called on |
||
564 | * _NEW_PROJECTION. The _mesa_ClipPlane() function keeps these values up to |
||
565 | * date across changes to the __struct gl_contextRec::Transform attributes. |
||
566 | */ |
||
567 | static void |
||
568 | update_projection( struct gl_context *ctx ) |
||
569 | { |
||
570 | _math_matrix_analyse( ctx->ProjectionMatrixStack.Top ); |
||
571 | |||
572 | #if FEATURE_userclip |
||
573 | /* Recompute clip plane positions in clipspace. This is also done |
||
574 | * in _mesa_ClipPlane(). |
||
575 | */ |
||
576 | if (ctx->Transform.ClipPlanesEnabled) { |
||
577 | GLuint p; |
||
578 | for (p = 0; p < ctx->Const.MaxClipPlanes; p++) { |
||
579 | if (ctx->Transform.ClipPlanesEnabled & (1 << p)) { |
||
580 | _mesa_transform_vector( ctx->Transform._ClipUserPlane[p], |
||
581 | ctx->Transform.EyeUserPlane[p], |
||
582 | ctx->ProjectionMatrixStack.Top->inv ); |
||
583 | } |
||
584 | } |
||
585 | } |
||
586 | #endif |
||
587 | } |
||
588 | |||
589 | |||
590 | /** |
||
591 | * Calculate the combined modelview-projection matrix. |
||
592 | * |
||
593 | * \param ctx GL context. |
||
594 | * |
||
595 | * Multiplies the top matrices of the projection and model view stacks into |
||
596 | * __struct gl_contextRec::_ModelProjectMatrix via _math_matrix_mul_matrix() and |
||
597 | * analyzes the resulting matrix via _math_matrix_analyse(). |
||
598 | */ |
||
599 | static void |
||
600 | calculate_model_project_matrix( struct gl_context *ctx ) |
||
601 | { |
||
602 | _math_matrix_mul_matrix( &ctx->_ModelProjectMatrix, |
||
603 | ctx->ProjectionMatrixStack.Top, |
||
604 | ctx->ModelviewMatrixStack.Top ); |
||
605 | |||
606 | _math_matrix_analyse( &ctx->_ModelProjectMatrix ); |
||
607 | } |
||
608 | |||
609 | |||
610 | /** |
||
611 | * Updates the combined modelview-projection matrix. |
||
612 | * |
||
613 | * \param ctx GL context. |
||
614 | * \param new_state new state bit mask. |
||
615 | * |
||
616 | * If there is a new model view matrix then analyzes it. If there is a new |
||
617 | * projection matrix, updates it. Finally calls |
||
618 | * calculate_model_project_matrix() to recalculate the modelview-projection |
||
619 | * matrix. |
||
620 | */ |
||
621 | void _mesa_update_modelview_project( struct gl_context *ctx, GLuint new_state ) |
||
622 | { |
||
623 | if (new_state & _NEW_MODELVIEW) { |
||
624 | _math_matrix_analyse( ctx->ModelviewMatrixStack.Top ); |
||
625 | |||
626 | /* Bring cull position uptodate. |
||
627 | */ |
||
628 | TRANSFORM_POINT3( ctx->Transform.CullObjPos, |
||
629 | ctx->ModelviewMatrixStack.Top->inv, |
||
630 | ctx->Transform.CullEyePos ); |
||
631 | } |
||
632 | |||
633 | |||
634 | if (new_state & _NEW_PROJECTION) |
||
635 | update_projection( ctx ); |
||
636 | |||
637 | /* Keep ModelviewProject uptodate always to allow tnl |
||
638 | * implementations that go model->clip even when eye is required. |
||
639 | */ |
||
640 | calculate_model_project_matrix(ctx); |
||
641 | } |
||
642 | |||
643 | /*@}*/ |
||
644 | |||
645 | |||
646 | /**********************************************************************/ |
||
647 | /** Matrix stack initialization */ |
||
648 | /*@{*/ |
||
649 | |||
650 | |||
651 | /** |
||
652 | * Initialize a matrix stack. |
||
653 | * |
||
654 | * \param stack matrix stack. |
||
655 | * \param maxDepth maximum stack depth. |
||
656 | * \param dirtyFlag dirty flag. |
||
657 | * |
||
658 | * Allocates an array of \p maxDepth elements for the matrix stack and calls |
||
659 | * _math_matrix_ctr() and _math_matrix_alloc_inv() for each element to |
||
660 | * initialize it. |
||
661 | */ |
||
662 | static void |
||
663 | init_matrix_stack( struct gl_matrix_stack *stack, |
||
664 | GLuint maxDepth, GLuint dirtyFlag ) |
||
665 | { |
||
666 | GLuint i; |
||
667 | |||
668 | stack->Depth = 0; |
||
669 | stack->MaxDepth = maxDepth; |
||
670 | stack->DirtyFlag = dirtyFlag; |
||
671 | /* The stack */ |
||
672 | stack->Stack = (GLmatrix *) CALLOC(maxDepth * sizeof(GLmatrix)); |
||
673 | for (i = 0; i < maxDepth; i++) { |
||
674 | _math_matrix_ctr(&stack->Stack[i]); |
||
675 | _math_matrix_alloc_inv(&stack->Stack[i]); |
||
676 | } |
||
677 | stack->Top = stack->Stack; |
||
678 | } |
||
679 | |||
680 | /** |
||
681 | * Free matrix stack. |
||
682 | * |
||
683 | * \param stack matrix stack. |
||
684 | * |
||
685 | * Calls _math_matrix_dtr() for each element of the matrix stack and |
||
686 | * frees the array. |
||
687 | */ |
||
688 | static void |
||
689 | free_matrix_stack( struct gl_matrix_stack *stack ) |
||
690 | { |
||
691 | GLuint i; |
||
692 | for (i = 0; i < stack->MaxDepth; i++) { |
||
693 | _math_matrix_dtr(&stack->Stack[i]); |
||
694 | } |
||
695 | FREE(stack->Stack); |
||
696 | stack->Stack = stack->Top = NULL; |
||
697 | } |
||
698 | |||
699 | /*@}*/ |
||
700 | |||
701 | |||
702 | /**********************************************************************/ |
||
703 | /** \name Initialization */ |
||
704 | /*@{*/ |
||
705 | |||
706 | |||
707 | /** |
||
708 | * Initialize the context matrix data. |
||
709 | * |
||
710 | * \param ctx GL context. |
||
711 | * |
||
712 | * Initializes each of the matrix stacks and the combined modelview-projection |
||
713 | * matrix. |
||
714 | */ |
||
715 | void _mesa_init_matrix( struct gl_context * ctx ) |
||
716 | { |
||
717 | GLint i; |
||
718 | |||
719 | /* Initialize matrix stacks */ |
||
720 | init_matrix_stack(&ctx->ModelviewMatrixStack, MAX_MODELVIEW_STACK_DEPTH, |
||
721 | _NEW_MODELVIEW); |
||
722 | init_matrix_stack(&ctx->ProjectionMatrixStack, MAX_PROJECTION_STACK_DEPTH, |
||
723 | _NEW_PROJECTION); |
||
724 | for (i = 0; i < Elements(ctx->TextureMatrixStack); i++) |
||
725 | init_matrix_stack(&ctx->TextureMatrixStack[i], MAX_TEXTURE_STACK_DEPTH, |
||
726 | _NEW_TEXTURE_MATRIX); |
||
727 | for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++) |
||
728 | init_matrix_stack(&ctx->ProgramMatrixStack[i], |
||
729 | MAX_PROGRAM_MATRIX_STACK_DEPTH, _NEW_TRACK_MATRIX); |
||
730 | ctx->CurrentStack = &ctx->ModelviewMatrixStack; |
||
731 | |||
732 | /* Init combined Modelview*Projection matrix */ |
||
733 | _math_matrix_ctr( &ctx->_ModelProjectMatrix ); |
||
734 | } |
||
735 | |||
736 | |||
737 | /** |
||
738 | * Free the context matrix data. |
||
739 | * |
||
740 | * \param ctx GL context. |
||
741 | * |
||
742 | * Frees each of the matrix stacks and the combined modelview-projection |
||
743 | * matrix. |
||
744 | */ |
||
745 | void _mesa_free_matrix_data( struct gl_context *ctx ) |
||
746 | { |
||
747 | GLint i; |
||
748 | |||
749 | free_matrix_stack(&ctx->ModelviewMatrixStack); |
||
750 | free_matrix_stack(&ctx->ProjectionMatrixStack); |
||
751 | for (i = 0; i < Elements(ctx->TextureMatrixStack); i++) |
||
752 | free_matrix_stack(&ctx->TextureMatrixStack[i]); |
||
753 | for (i = 0; i < Elements(ctx->ProgramMatrixStack); i++) |
||
754 | free_matrix_stack(&ctx->ProgramMatrixStack[i]); |
||
755 | /* combined Modelview*Projection matrix */ |
||
756 | _math_matrix_dtr( &ctx->_ModelProjectMatrix ); |
||
757 | |||
758 | } |
||
759 | |||
760 | |||
761 | /** |
||
762 | * Initialize the context transform attribute group. |
||
763 | * |
||
764 | * \param ctx GL context. |
||
765 | * |
||
766 | * \todo Move this to a new file with other 'transform' routines. |
||
767 | */ |
||
768 | void _mesa_init_transform( struct gl_context *ctx ) |
||
769 | { |
||
770 | GLint i; |
||
771 | |||
772 | /* Transformation group */ |
||
773 | ctx->Transform.MatrixMode = GL_MODELVIEW; |
||
774 | ctx->Transform.Normalize = GL_FALSE; |
||
775 | ctx->Transform.RescaleNormals = GL_FALSE; |
||
776 | ctx->Transform.RasterPositionUnclipped = GL_FALSE; |
||
777 | for (i=0;i |
||
778 | ASSIGN_4V( ctx->Transform.EyeUserPlane[i], 0.0, 0.0, 0.0, 0.0 ); |
||
779 | } |
||
780 | ctx->Transform.ClipPlanesEnabled = 0; |
||
781 | |||
782 | ASSIGN_4V( ctx->Transform.CullObjPos, 0.0, 0.0, 1.0, 0.0 ); |
||
783 | ASSIGN_4V( ctx->Transform.CullEyePos, 0.0, 0.0, 1.0, 0.0 ); |
||
784 | } |
||
785 | |||
786 | |||
787 | /*@}*/>>>>>>><>>>>>=>=> |