1 | /* |
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2 | ----------------------------------------------------------------------------- |
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3 | This source file is part of OGRE |
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4 | (Object-oriented Graphics Rendering Engine) |
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5 | For the latest info, see http://www.ogre3d.org/ |
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6 | |
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7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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8 | Also see acknowledgements in Readme.html |
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9 | |
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10 | This program is free software; you can redistribute it and/or modify it under |
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11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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12 | Foundation; either version 2 of the License, or (at your option) any later |
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13 | version. |
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14 | |
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15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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18 | |
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19 | You should have received a copy of the GNU Lesser General Public License along with |
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20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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22 | http://www.gnu.org/copyleft/lesser.txt. |
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23 | |
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24 | You may alternatively use this source under the terms of a specific version of |
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25 | the OGRE Unrestricted License provided you have obtained such a license from |
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26 | Torus Knot Software Ltd. |
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27 | ----------------------------------------------------------------------------- |
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28 | */ |
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29 | |
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30 | #include "OgreGLSLExtSupport.h" |
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31 | #include "OgreGLSLGpuProgram.h" |
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32 | #include "OgreGLSLLinkProgramManager.h" |
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33 | #include "OgreGLSLLinkProgram.h" |
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34 | #include "OgreGLSLProgram.h" |
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35 | |
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36 | namespace Ogre { |
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37 | |
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38 | GLuint GLSLGpuProgram::mVertexShaderCount = 0; |
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39 | GLuint GLSLGpuProgram::mFragmentShaderCount = 0; |
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40 | |
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41 | //----------------------------------------------------------------------------- |
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42 | GLSLGpuProgram::GLSLGpuProgram(GLSLProgram* parent) : |
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43 | GLGpuProgram(parent->getCreator(), parent->getName(), parent->getHandle(), |
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44 | parent->getGroup(), false, 0), mGLSLProgram(parent) |
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45 | { |
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46 | mType = parent->getType(); |
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47 | mSyntaxCode = "glsl"; |
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48 | |
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49 | if (parent->getType() == GPT_VERTEX_PROGRAM) |
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50 | { |
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51 | mProgramID = ++mVertexShaderCount; |
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52 | } |
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53 | else |
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54 | { |
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55 | mProgramID = ++mFragmentShaderCount; |
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56 | } |
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57 | |
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58 | // transfer skeletal animation status from parent |
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59 | mSkeletalAnimation = mGLSLProgram->isSkeletalAnimationIncluded(); |
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60 | // there is nothing to load |
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61 | mLoadFromFile = false; |
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62 | |
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63 | } |
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64 | //----------------------------------------------------------------------- |
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65 | GLSLGpuProgram::~GLSLGpuProgram() |
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66 | { |
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67 | // have to call this here reather than in Resource destructor |
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68 | // since calling virtual methods in base destructors causes crash |
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69 | unload(); |
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70 | } |
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71 | //----------------------------------------------------------------------------- |
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72 | void GLSLGpuProgram::loadImpl(void) |
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73 | { |
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74 | // nothing to load |
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75 | } |
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76 | |
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77 | //----------------------------------------------------------------------------- |
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78 | void GLSLGpuProgram::unloadImpl(void) |
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79 | { |
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80 | // nothing to unload |
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81 | } |
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82 | |
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83 | //----------------------------------------------------------------------------- |
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84 | void GLSLGpuProgram::loadFromSource(void) |
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85 | { |
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86 | // nothing to load |
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87 | } |
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88 | |
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89 | //----------------------------------------------------------------------------- |
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90 | void GLSLGpuProgram::bindProgram(void) |
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91 | { |
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92 | // tell the Link Program Manager what shader is to become active |
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93 | if (mType == GPT_VERTEX_PROGRAM) |
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94 | { |
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95 | GLSLLinkProgramManager::getSingleton().setActiveVertexShader( this ); |
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96 | } |
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97 | else // its a fragment shader |
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98 | { |
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99 | GLSLLinkProgramManager::getSingleton().setActiveFragmentShader( this ); |
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100 | } |
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101 | } |
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102 | |
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103 | //----------------------------------------------------------------------------- |
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104 | void GLSLGpuProgram::unbindProgram(void) |
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105 | { |
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106 | // tell the Link Program Manager what shader is to become inactive |
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107 | if (mType == GPT_VERTEX_PROGRAM) |
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108 | { |
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109 | GLSLLinkProgramManager::getSingleton().setActiveVertexShader( NULL ); |
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110 | } |
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111 | else // its a fragment shader |
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112 | { |
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113 | GLSLLinkProgramManager::getSingleton().setActiveFragmentShader( NULL ); |
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114 | } |
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115 | |
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116 | } |
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117 | |
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118 | //----------------------------------------------------------------------------- |
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119 | void GLSLGpuProgram::bindProgramParameters(GpuProgramParametersSharedPtr params) |
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120 | { |
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121 | // activate the link program object |
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122 | GLSLLinkProgram* linkProgram = GLSLLinkProgramManager::getSingleton().getActiveLinkProgram(); |
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123 | // pass on parameters from params to program object uniforms |
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124 | linkProgram->updateUniforms(params, mType); |
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125 | |
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126 | } |
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127 | |
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128 | //----------------------------------------------------------------------------- |
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129 | void GLSLGpuProgram::bindProgramPassIterationParameters(GpuProgramParametersSharedPtr params) |
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130 | { |
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131 | // activate the link program object |
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132 | GLSLLinkProgram* linkProgram = GLSLLinkProgramManager::getSingleton().getActiveLinkProgram(); |
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133 | // pass on parameters from params to program object uniforms |
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134 | linkProgram->updatePassIterationUniforms( params ); |
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135 | |
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136 | } |
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137 | //----------------------------------------------------------------------------- |
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138 | GLuint GLSLGpuProgram::getAttributeIndex(VertexElementSemantic semantic) |
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139 | { |
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140 | // get link program - only call this in the context of bound program |
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141 | GLSLLinkProgram* linkProgram = GLSLLinkProgramManager::getSingleton().getActiveLinkProgram(); |
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142 | |
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143 | if (linkProgram->isAttributeValid(semantic)) |
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144 | { |
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145 | return linkProgram->getAttributeIndex(semantic); |
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146 | } |
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147 | else |
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148 | { |
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149 | // fall back to default implementation, allow default bindings |
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150 | return GLGpuProgram::getAttributeIndex(semantic); |
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151 | } |
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152 | |
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153 | } |
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154 | //----------------------------------------------------------------------------- |
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155 | bool GLSLGpuProgram::isAttributeValid(VertexElementSemantic semantic) |
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156 | { |
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157 | // get link program - only call this in the context of bound program |
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158 | GLSLLinkProgram* linkProgram = GLSLLinkProgramManager::getSingleton().getActiveLinkProgram(); |
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159 | |
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160 | if (linkProgram->isAttributeValid(semantic)) |
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161 | { |
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162 | return true; |
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163 | } |
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164 | else |
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165 | { |
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166 | // fall back to default implementation, allow default bindings |
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167 | return GLGpuProgram::isAttributeValid(semantic); |
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168 | } |
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169 | } |
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170 | |
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171 | |
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172 | |
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173 | } |
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174 | |
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