1 // 2 // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved. 3 // Use of this source code is governed by a BSD-style license that can be 4 // found in the LICENSE file. 5 // 6 7 // Config.cpp: Implements the egl::Config class, describing the format, type 8 // and size for an egl::Surface. Implements EGLConfig and related functionality. 9 // [EGL 1.4] section 3.4 page 15. 10 11 #include "libEGL/Config.h" 12 13 #include <algorithm> 14 #include <vector> 15 16 #include <GLES2/gl2.h> 17 #include <GLES2/gl2ext.h> 18 19 #include "common/debug.h" 20 21 using namespace std; 22 23 namespace egl 24 { 25 Config::Config(rx::ConfigDesc desc, EGLint minInterval, EGLint maxInterval, EGLint texWidth, EGLint texHeight) 26 : mRenderTargetFormat(desc.renderTargetFormat), mDepthStencilFormat(desc.depthStencilFormat), mMultiSample(desc.multiSample) 27 { 28 mBindToTextureRGB = EGL_FALSE; 29 mBindToTextureRGBA = EGL_FALSE; 30 switch (desc.renderTargetFormat) 31 { 32 case GL_RGB5_A1: 33 mBufferSize = 16; 34 mRedSize = 5; 35 mGreenSize = 5; 36 mBlueSize = 5; 37 mAlphaSize = 1; 38 break; 39 case GL_RGBA8_OES: 40 mBufferSize = 32; 41 mRedSize = 8; 42 mGreenSize = 8; 43 mBlueSize = 8; 44 mAlphaSize = 8; 45 mBindToTextureRGBA = true; 46 break; 47 case GL_RGB565: 48 mBufferSize = 16; 49 mRedSize = 5; 50 mGreenSize = 6; 51 mBlueSize = 5; 52 mAlphaSize = 0; 53 break; 54 case GL_RGB8_OES: 55 mBufferSize = 32; 56 mRedSize = 8; 57 mGreenSize = 8; 58 mBlueSize = 8; 59 mAlphaSize = 0; 60 mBindToTextureRGB = true; 61 break; 62 case GL_BGRA8_EXT: 63 mBufferSize = 32; 64 mRedSize = 8; 65 mGreenSize = 8; 66 mBlueSize = 8; 67 mAlphaSize = 8; 68 mBindToTextureRGBA = true; 69 break; 70 default: 71 UNREACHABLE(); // Other formats should not be valid 72 } 73 74 mLuminanceSize = 0; 75 mAlphaMaskSize = 0; 76 mColorBufferType = EGL_RGB_BUFFER; 77 mConfigCaveat = (desc.fastConfig) ? EGL_NONE : EGL_SLOW_CONFIG; 78 mConfigID = 0; 79 mConformant = EGL_OPENGL_ES2_BIT; 80 81 switch (desc.depthStencilFormat) 82 { 83 case GL_NONE: 84 mDepthSize = 0; 85 mStencilSize = 0; 86 break; 87 case GL_DEPTH_COMPONENT32_OES: 88 mDepthSize = 32; 89 mStencilSize = 0; 90 break; 91 case GL_DEPTH24_STENCIL8_OES: 92 mDepthSize = 24; 93 mStencilSize = 8; 94 break; 95 case GL_DEPTH_COMPONENT24_OES: 96 mDepthSize = 24; 97 mStencilSize = 0; 98 break; 99 case GL_DEPTH_COMPONENT16: 100 mDepthSize = 16; 101 mStencilSize = 0; 102 break; 103 default: 104 UNREACHABLE(); 105 } 106 107 mLevel = 0; 108 mMatchNativePixmap = EGL_NONE; 109 mMaxPBufferWidth = texWidth; 110 mMaxPBufferHeight = texHeight; 111 mMaxPBufferPixels = texWidth*texHeight; 112 mMaxSwapInterval = maxInterval; 113 mMinSwapInterval = minInterval; 114 mNativeRenderable = EGL_FALSE; 115 mNativeVisualID = 0; 116 mNativeVisualType = 0; 117 mRenderableType = EGL_OPENGL_ES2_BIT; 118 mSampleBuffers = desc.multiSample ? 1 : 0; 119 mSamples = desc.multiSample; 120 mSurfaceType = EGL_PBUFFER_BIT | EGL_WINDOW_BIT | EGL_SWAP_BEHAVIOR_PRESERVED_BIT; 121 mTransparentType = EGL_NONE; 122 mTransparentRedValue = 0; 123 mTransparentGreenValue = 0; 124 mTransparentBlueValue = 0; 125 } 126 127 EGLConfig Config::getHandle() const 128 { 129 return (EGLConfig)(size_t)mConfigID; 130 } 131 132 SortConfig::SortConfig(const EGLint *attribList) 133 : mWantRed(false), mWantGreen(false), mWantBlue(false), mWantAlpha(false), mWantLuminance(false) 134 { 135 scanForWantedComponents(attribList); 136 } 137 138 void SortConfig::scanForWantedComponents(const EGLint *attribList) 139 { 140 // [EGL] section 3.4.1 page 24 141 // Sorting rule #3: by larger total number of color bits, not considering 142 // components that are 0 or don't-care. 143 for (const EGLint *attr = attribList; attr[0] != EGL_NONE; attr += 2) 144 { 145 if (attr[1] != 0 && attr[1] != EGL_DONT_CARE) 146 { 147 switch (attr[0]) 148 { 149 case EGL_RED_SIZE: mWantRed = true; break; 150 case EGL_GREEN_SIZE: mWantGreen = true; break; 151 case EGL_BLUE_SIZE: mWantBlue = true; break; 152 case EGL_ALPHA_SIZE: mWantAlpha = true; break; 153 case EGL_LUMINANCE_SIZE: mWantLuminance = true; break; 154 } 155 } 156 } 157 } 158 159 EGLint SortConfig::wantedComponentsSize(const Config &config) const 160 { 161 EGLint total = 0; 162 163 if (mWantRed) total += config.mRedSize; 164 if (mWantGreen) total += config.mGreenSize; 165 if (mWantBlue) total += config.mBlueSize; 166 if (mWantAlpha) total += config.mAlphaSize; 167 if (mWantLuminance) total += config.mLuminanceSize; 168 169 return total; 170 } 171 172 bool SortConfig::operator()(const Config *x, const Config *y) const 173 { 174 return (*this)(*x, *y); 175 } 176 177 bool SortConfig::operator()(const Config &x, const Config &y) const 178 { 179 #define SORT(attribute) \ 180 if (x.attribute != y.attribute) \ 181 { \ 182 return x.attribute < y.attribute; \ 183 } 184 185 META_ASSERT(EGL_NONE < EGL_SLOW_CONFIG && EGL_SLOW_CONFIG < EGL_NON_CONFORMANT_CONFIG); 186 SORT(mConfigCaveat); 187 188 META_ASSERT(EGL_RGB_BUFFER < EGL_LUMINANCE_BUFFER); 189 SORT(mColorBufferType); 190 191 // By larger total number of color bits, only considering those that are requested to be > 0. 192 EGLint xComponentsSize = wantedComponentsSize(x); 193 EGLint yComponentsSize = wantedComponentsSize(y); 194 if (xComponentsSize != yComponentsSize) 195 { 196 return xComponentsSize > yComponentsSize; 197 } 198 199 SORT(mBufferSize); 200 SORT(mSampleBuffers); 201 SORT(mSamples); 202 SORT(mDepthSize); 203 SORT(mStencilSize); 204 SORT(mAlphaMaskSize); 205 SORT(mNativeVisualType); 206 SORT(mConfigID); 207 208 #undef SORT 209 210 return false; 211 } 212 213 // We'd like to use SortConfig to also eliminate duplicate configs. 214 // This works as long as we never have two configs with different per-RGB-component layouts, 215 // but the same total. 216 // 5551 and 565 are different because R+G+B is different. 217 // 5551 and 555 are different because bufferSize is different. 218 const EGLint ConfigSet::mSortAttribs[] = 219 { 220 EGL_RED_SIZE, 1, 221 EGL_GREEN_SIZE, 1, 222 EGL_BLUE_SIZE, 1, 223 EGL_LUMINANCE_SIZE, 1, 224 // BUT NOT ALPHA 225 EGL_NONE 226 }; 227 228 ConfigSet::ConfigSet() 229 : mSet(SortConfig(mSortAttribs)) 230 { 231 } 232 233 void ConfigSet::add(rx::ConfigDesc desc, EGLint minSwapInterval, EGLint maxSwapInterval, EGLint texWidth, EGLint texHeight) 234 { 235 Config config(desc, minSwapInterval, maxSwapInterval, texWidth, texHeight); 236 mSet.insert(config); 237 } 238 239 size_t ConfigSet::size() const 240 { 241 return mSet.size(); 242 } 243 244 bool ConfigSet::getConfigs(EGLConfig *configs, const EGLint *attribList, EGLint configSize, EGLint *numConfig) 245 { 246 vector<const Config*> passed; 247 passed.reserve(mSet.size()); 248 249 for (Iterator config = mSet.begin(); config != mSet.end(); config++) 250 { 251 bool match = true; 252 const EGLint *attribute = attribList; 253 254 while (attribute[0] != EGL_NONE) 255 { 256 switch (attribute[0]) 257 { 258 case EGL_BUFFER_SIZE: match = config->mBufferSize >= attribute[1]; break; 259 case EGL_ALPHA_SIZE: match = config->mAlphaSize >= attribute[1]; break; 260 case EGL_BLUE_SIZE: match = config->mBlueSize >= attribute[1]; break; 261 case EGL_GREEN_SIZE: match = config->mGreenSize >= attribute[1]; break; 262 case EGL_RED_SIZE: match = config->mRedSize >= attribute[1]; break; 263 case EGL_DEPTH_SIZE: match = config->mDepthSize >= attribute[1]; break; 264 case EGL_STENCIL_SIZE: match = config->mStencilSize >= attribute[1]; break; 265 case EGL_CONFIG_CAVEAT: match = config->mConfigCaveat == (EGLenum) attribute[1]; break; 266 case EGL_CONFIG_ID: match = config->mConfigID == attribute[1]; break; 267 case EGL_LEVEL: match = config->mLevel >= attribute[1]; break; 268 case EGL_NATIVE_RENDERABLE: match = config->mNativeRenderable == (EGLBoolean) attribute[1]; break; 269 case EGL_NATIVE_VISUAL_TYPE: match = config->mNativeVisualType == attribute[1]; break; 270 case EGL_SAMPLES: match = config->mSamples >= attribute[1]; break; 271 case EGL_SAMPLE_BUFFERS: match = config->mSampleBuffers >= attribute[1]; break; 272 case EGL_SURFACE_TYPE: match = (config->mSurfaceType & attribute[1]) == attribute[1]; break; 273 case EGL_TRANSPARENT_TYPE: match = config->mTransparentType == (EGLenum) attribute[1]; break; 274 case EGL_TRANSPARENT_BLUE_VALUE: match = config->mTransparentBlueValue == attribute[1]; break; 275 case EGL_TRANSPARENT_GREEN_VALUE: match = config->mTransparentGreenValue == attribute[1]; break; 276 case EGL_TRANSPARENT_RED_VALUE: match = config->mTransparentRedValue == attribute[1]; break; 277 case EGL_BIND_TO_TEXTURE_RGB: match = config->mBindToTextureRGB == (EGLBoolean) attribute[1]; break; 278 case EGL_BIND_TO_TEXTURE_RGBA: match = config->mBindToTextureRGBA == (EGLBoolean) attribute[1]; break; 279 case EGL_MIN_SWAP_INTERVAL: match = config->mMinSwapInterval == attribute[1]; break; 280 case EGL_MAX_SWAP_INTERVAL: match = config->mMaxSwapInterval == attribute[1]; break; 281 case EGL_LUMINANCE_SIZE: match = config->mLuminanceSize >= attribute[1]; break; 282 case EGL_ALPHA_MASK_SIZE: match = config->mAlphaMaskSize >= attribute[1]; break; 283 case EGL_COLOR_BUFFER_TYPE: match = config->mColorBufferType == (EGLenum) attribute[1]; break; 284 case EGL_RENDERABLE_TYPE: match = (config->mRenderableType & attribute[1]) == attribute[1]; break; 285 case EGL_MATCH_NATIVE_PIXMAP: match = false; UNIMPLEMENTED(); break; 286 case EGL_CONFORMANT: match = (config->mConformant & attribute[1]) == attribute[1]; break; 287 case EGL_MAX_PBUFFER_WIDTH: match = config->mMaxPBufferWidth >= attribute[1]; break; 288 case EGL_MAX_PBUFFER_HEIGHT: match = config->mMaxPBufferHeight >= attribute[1]; break; 289 case EGL_MAX_PBUFFER_PIXELS: match = config->mMaxPBufferPixels >= attribute[1]; break; 290 default: 291 return false; 292 } 293 294 if (!match) 295 { 296 break; 297 } 298 299 attribute += 2; 300 } 301 302 if (match) 303 { 304 passed.push_back(&*config); 305 } 306 } 307 308 if (configs) 309 { 310 sort(passed.begin(), passed.end(), SortConfig(attribList)); 311 312 EGLint index; 313 for (index = 0; index < configSize && index < static_cast<EGLint>(passed.size()); index++) 314 { 315 configs[index] = passed[index]->getHandle(); 316 } 317 318 *numConfig = index; 319 } 320 else 321 { 322 *numConfig = passed.size(); 323 } 324 325 return true; 326 } 327 328 const egl::Config *ConfigSet::get(EGLConfig configHandle) 329 { 330 for (Iterator config = mSet.begin(); config != mSet.end(); config++) 331 { 332 if (config->getHandle() == configHandle) 333 { 334 return &(*config); 335 } 336 } 337 338 return NULL; 339 } 340 } 341
