1 | #include "RenderState.h"
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2 | #include "Geometry.h"
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3 | #include "Material.h"
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4 | #include "ShaderProgram.h"
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5 | #include "Texture.h"
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6 | #include "ResourceManager.h"
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7 |
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8 |
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9 | using namespace std;
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10 |
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11 |
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12 | namespace CHCDemoEngine
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13 | {
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14 |
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15 |
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16 | /////////////////
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17 |
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18 | RenderState::RenderState():
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19 | mRenderType(FIXED),
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20 | mUseAlphaToCoverage(true),
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21 | mLockCullFaceEnabled(false)
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22 | {
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23 | SetMode(RENDER);
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24 |
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25 | mCurrentVboId = -1;
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26 | mCurrentTexId = 0;
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27 |
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28 | mCullFaceEnabled = true;
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29 | mAlphaTestEnabled = false;
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30 | mTexturesEnabled = false;
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31 |
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32 | mCurrentVertexProgram = NULL;
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33 | mCurrentFragmentProgram = NULL;
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34 |
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35 | glEnable(GL_CULL_FACE);
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36 |
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37 | glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
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38 | glDisable(GL_ALPHA_TEST);
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39 |
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40 | glDisable(GL_TEXTURE_2D);
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41 | glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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42 | }
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43 |
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44 |
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45 | void RenderState::Reset()
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46 | {
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47 | SetMode(RENDER);
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48 |
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49 | mCurrentVboId = -1;
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50 | mCurrentTexId = 0;
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51 |
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52 | mCullFaceEnabled = true;
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53 | mAlphaTestEnabled = false;
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54 | mTexturesEnabled = false;
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55 |
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56 | mCurrentVertexProgram = NULL;
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57 | mCurrentFragmentProgram = NULL;
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58 |
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59 | glEnable(GL_CULL_FACE);
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60 |
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61 | glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
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62 | glDisable(GL_ALPHA_TEST);
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63 |
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64 | glDisable(GL_TEXTURE_2D);
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65 | glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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66 |
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67 | ResourceManager::GetSingleton()->DisableFragmentProfile();
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68 | ResourceManager::GetSingleton()->DisableVertexProfile();
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69 | }
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70 |
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71 |
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72 | bool RenderState::SetMode(Mode mode)
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73 | {
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74 | ///////////
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75 | //-- just change the modewhen necessary
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76 |
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77 | if (mode == mMode) return false;
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78 |
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79 | mMode = mode;
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80 |
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81 | if (mode == QUERY)
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82 | {
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83 | if (mRenderType != DEPTH_PASS)
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84 | {
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85 | glDisable(GL_LIGHTING);
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86 | glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
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87 |
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88 | if (mRenderType == DEFERRED)
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89 | {
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90 | ResourceManager::GetSingleton()->DisableFragmentProfile();
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91 | ResourceManager::GetSingleton()->DisableFragmentProfile();
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92 | }
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93 | }
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94 |
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95 | glDepthMask(GL_FALSE);
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96 |
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97 | static Material defaultMat;
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98 | SetState(&defaultMat);
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99 | }
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100 | else // mode returns to render
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101 | {
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102 | /////////////
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103 | //-- restore render state
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104 |
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105 | if (mRenderType != DEPTH_PASS)
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106 | {
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107 | glEnable(GL_LIGHTING);
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108 | glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
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109 |
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110 | if (mRenderType == DEFERRED)
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111 | {
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112 | ResourceManager::GetSingleton()->EnableFragmentProfile();
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113 | ResourceManager::GetSingleton()->EnableVertexProfile();
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114 | }
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115 | }
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116 |
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117 | glDepthMask(GL_TRUE);
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118 | }
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119 |
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120 | return true;
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121 | }
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122 |
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123 |
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124 | void RenderState::SetState(Material *mat)
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125 | {
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126 | Texture *tex = mat->GetTexture();
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127 |
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128 | const bool texturing = (tex != NULL);
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129 |
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130 | bool alphaTest = mat->IsAlphaTestEnabled();
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131 | bool cullFace = mat->IsCullFaceEnabled();
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132 |
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133 | if (!mLockCullFaceEnabled)
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134 | {
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135 | if (mCullFaceEnabled && !cullFace)
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136 | {
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137 | mCullFaceEnabled = false;
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138 | glDisable(GL_CULL_FACE);
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139 | }
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140 | else if (!mCullFaceEnabled && cullFace)
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141 | {
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142 | mCullFaceEnabled = true;
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143 | glEnable(GL_CULL_FACE);
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144 | }
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145 | }
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146 | if (mAlphaTestEnabled && !alphaTest)
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147 | {
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148 | mAlphaTestEnabled = false;
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149 |
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150 | if (mUseAlphaToCoverage)
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151 | glDisable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
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152 | else
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153 | glDisable(GL_ALPHA_TEST);
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154 | }
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155 | else if (!mAlphaTestEnabled && alphaTest)
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156 | {
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157 | mAlphaTestEnabled = true;
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158 |
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159 | if (mUseAlphaToCoverage)
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160 | glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE_ARB);
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161 | else
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162 | glEnable(GL_ALPHA_TEST);
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163 | }
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164 |
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165 | if (mTexturesEnabled &&
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166 | (!texturing || (mRenderType == DEPTH_PASS) && !mAlphaTestEnabled))
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167 | {
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168 | mTexturesEnabled = false;
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169 |
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170 | if (mRenderType != DEFERRED)//!mat->mFragmentProgram)
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171 | glDisable(GL_TEXTURE_2D);
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172 |
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173 | glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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174 | }
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175 | else if (!mTexturesEnabled && texturing)
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176 | {
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177 | // support only alpha textures in depth pass
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178 | if ((mRenderType != DEPTH_PASS) || mAlphaTestEnabled)
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179 | {
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180 | mTexturesEnabled = true;
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181 |
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182 | if (mRenderType != DEFERRED)//!mat->mFragmentProgram)
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183 | glEnable(GL_TEXTURE_2D);
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184 |
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185 | glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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186 | }
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187 | }
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188 |
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189 | if (mRenderType == DEFERRED)
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190 | {
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191 | if (mat->GetFragmentProgram())
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192 | {
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193 | if (mat->GetFragmentProgram() != mCurrentFragmentProgram)
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194 | {
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195 | mCurrentFragmentProgram = mat->GetFragmentProgram();
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196 | mCurrentFragmentProgram->Bind();
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197 | }
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198 |
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199 | mat->GetFragmentProgramParameters()->UpdateParameters();
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200 |
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201 | }
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202 |
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203 | if (mat->GetVertexProgram())
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204 | {
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205 | if (mat->GetVertexProgram() != mCurrentVertexProgram)
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206 | {
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207 | mCurrentVertexProgram = mat->GetVertexProgram();
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208 | mCurrentVertexProgram->Bind();
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209 | }
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210 |
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211 | mat->GetVertexProgramParameters()->UpdateParameters();
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212 | }
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213 | }
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214 | else
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215 | {
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216 | // set fixed texture
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217 | if (tex)
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218 | {
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219 | if (mCurrentTexId != tex->GetId())
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220 | {
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221 | tex->Bind();
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222 | mCurrentTexId = tex->GetId();
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223 | }
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224 | }
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225 | else
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226 | {
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227 | mCurrentTexId = 0;
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228 | glBindTexture(GL_TEXTURE_2D, 0);
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229 | }
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230 | }
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231 | }
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232 |
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233 |
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234 | void RenderState::SetUseAlphaToCoverage(bool useAlphaToCoverage)
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235 | {
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236 | mUseAlphaToCoverage = useAlphaToCoverage;
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237 | }
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238 |
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239 |
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240 | void RenderState::SetRenderPassType(RenderPassType t)
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241 | {
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242 | mRenderType = t;
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243 | }
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244 |
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245 |
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246 | RenderState::RenderPassType RenderState::GetRenderPassType() const
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247 | {
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248 | return mRenderType;
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249 | }
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250 |
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251 |
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252 | void RenderState::LockCullFaceEnabled(bool lockCull)
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253 | {
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254 | mLockCullFaceEnabled = lockCull;
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255 | }
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256 |
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257 |
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258 | } |
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