1 /* 2 * Copyright 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include <GLES/gl.h> 18 #include <GLES/glext.h> 19 20 #include <ui/Rect.h> 21 22 #include <utils/String8.h> 23 #include <cutils/compiler.h> 24 #include <gui/ISurfaceComposer.h> 25 26 #include "GLES11RenderEngine.h" 27 #include "Mesh.h" 28 #include "Texture.h" 29 30 // --------------------------------------------------------------------------- 31 namespace android { 32 // --------------------------------------------------------------------------- 33 34 GLES11RenderEngine::GLES11RenderEngine() { 35 36 glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize); 37 glGetIntegerv(GL_MAX_VIEWPORT_DIMS, mMaxViewportDims); 38 39 glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 40 glPixelStorei(GL_PACK_ALIGNMENT, 4); 41 glEnableClientState(GL_VERTEX_ARRAY); 42 glShadeModel(GL_FLAT); 43 glDisable(GL_DITHER); 44 glDisable(GL_CULL_FACE); 45 46 const uint16_t protTexData[] = { 0 }; 47 glGenTextures(1, &mProtectedTexName); 48 glBindTexture(GL_TEXTURE_2D, mProtectedTexName); 49 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); 50 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); 51 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); 52 glTexParameterx(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); 53 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0, 54 GL_RGB, GL_UNSIGNED_SHORT_5_6_5, protTexData); 55 } 56 57 GLES11RenderEngine::~GLES11RenderEngine() { 58 } 59 60 61 size_t GLES11RenderEngine::getMaxTextureSize() const { 62 return mMaxTextureSize; 63 } 64 65 size_t GLES11RenderEngine::getMaxViewportDims() const { 66 return 67 mMaxViewportDims[0] < mMaxViewportDims[1] ? 68 mMaxViewportDims[0] : mMaxViewportDims[1]; 69 } 70 71 void GLES11RenderEngine::setViewportAndProjection( 72 size_t vpw, size_t vph, Rect sourceCrop, size_t hwh, bool yswap, 73 Transform::orientation_flags rotation) { 74 glViewport(0, 0, vpw, vph); 75 glMatrixMode(GL_PROJECTION); 76 glLoadIdentity(); 77 78 size_t l = sourceCrop.left; 79 size_t r = sourceCrop.right; 80 81 // In GL, (0, 0) is the bottom-left corner, so flip y coordinates 82 size_t t = hwh - sourceCrop.top; 83 size_t b = hwh - sourceCrop.bottom; 84 85 if (yswap) { 86 glOrthof(l, r, t, b, 0, 1); 87 } else { 88 glOrthof(l, r, b, t, 0, 1); 89 } 90 91 switch (rotation) { 92 case Transform::ROT_0: 93 break; 94 case Transform::ROT_90: 95 glRotatef(90, 0, 0, 1); 96 break; 97 case Transform::ROT_180: 98 glRotatef(180, 0, 0, 1); 99 break; 100 case Transform::ROT_270: 101 glRotatef(270, 0, 0, 1); 102 break; 103 default: 104 break; 105 } 106 107 glMatrixMode(GL_MODELVIEW); 108 } 109 110 #ifdef USE_HWC2 111 void GLES11RenderEngine::setupLayerBlending(bool premultipliedAlpha, 112 bool opaque, float alpha) { 113 #else 114 void GLES11RenderEngine::setupLayerBlending( 115 bool premultipliedAlpha, bool opaque, int alpha) { 116 #endif 117 GLenum combineRGB; 118 GLenum combineAlpha; 119 GLenum src0Alpha; 120 GLfloat envColor[4]; 121 122 #ifdef USE_HWC2 123 if (CC_UNLIKELY(alpha < 1.0f)) { 124 #else 125 if (CC_UNLIKELY(alpha < 0xFF)) { 126 #endif 127 // Cv = premultiplied ? Cs*alpha : Cs 128 // Av = !opaque ? As*alpha : As 129 combineRGB = premultipliedAlpha ? GL_MODULATE : GL_REPLACE; 130 combineAlpha = !opaque ? GL_MODULATE : GL_REPLACE; 131 src0Alpha = GL_CONSTANT; 132 #ifdef USE_HWC2 133 envColor[0] = alpha; 134 #else 135 envColor[0] = alpha * (1.0f / 255.0f); 136 #endif 137 } else { 138 // Cv = Cs 139 // Av = opaque ? 1.0 : As 140 combineRGB = GL_REPLACE; 141 combineAlpha = GL_REPLACE; 142 src0Alpha = opaque ? GL_CONSTANT : GL_TEXTURE; 143 envColor[0] = 1.0f; 144 } 145 146 glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE); 147 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB, combineRGB); 148 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE); 149 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR); 150 if (combineRGB == GL_MODULATE) { 151 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_RGB, GL_CONSTANT); 152 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR); 153 } 154 glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA, combineAlpha); 155 glTexEnvi(GL_TEXTURE_ENV, GL_SRC0_ALPHA, src0Alpha); 156 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA); 157 if (combineAlpha == GL_MODULATE) { 158 glTexEnvi(GL_TEXTURE_ENV, GL_SRC1_ALPHA, GL_TEXTURE); 159 glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA); 160 } 161 if (combineRGB == GL_MODULATE || src0Alpha == GL_CONSTANT) { 162 envColor[1] = envColor[0]; 163 envColor[2] = envColor[0]; 164 envColor[3] = envColor[0]; 165 glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColor); 166 } 167 168 #ifdef USE_HWC2 169 if (alpha < 1.0f || !opaque) { 170 #else 171 if (alpha < 0xFF || !opaque) { 172 #endif 173 glEnable(GL_BLEND); 174 glBlendFunc(premultipliedAlpha ? GL_ONE : GL_SRC_ALPHA, 175 GL_ONE_MINUS_SRC_ALPHA); 176 } else { 177 glDisable(GL_BLEND); 178 } 179 } 180 181 #ifdef USE_HWC2 182 void GLES11RenderEngine::setupDimLayerBlending(float alpha) { 183 #else 184 void GLES11RenderEngine::setupDimLayerBlending(int alpha) { 185 #endif 186 glDisable(GL_TEXTURE_EXTERNAL_OES); 187 glDisable(GL_TEXTURE_2D); 188 #ifdef USE_HWC2 189 if (alpha == 1.0f) { 190 #else 191 if (alpha == 0xFF) { 192 #endif 193 glDisable(GL_BLEND); 194 } else { 195 glEnable(GL_BLEND); 196 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); 197 } 198 #ifdef USE_HWC2 199 glColor4f(0, 0, 0, alpha); 200 #else 201 glColor4f(0, 0, 0, alpha/255.0f); 202 #endif 203 } 204 205 void GLES11RenderEngine::setupLayerTexturing(const Texture& texture) { 206 GLuint target = texture.getTextureTarget(); 207 glBindTexture(target, texture.getTextureName()); 208 GLenum filter = GL_NEAREST; 209 if (texture.getFiltering()) { 210 filter = GL_LINEAR; 211 } 212 glTexParameterx(target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); 213 glTexParameterx(target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); 214 glTexParameterx(target, GL_TEXTURE_MAG_FILTER, filter); 215 glTexParameterx(target, GL_TEXTURE_MIN_FILTER, filter); 216 glMatrixMode(GL_TEXTURE); 217 glLoadMatrixf(texture.getMatrix().asArray()); 218 glMatrixMode(GL_MODELVIEW); 219 glDisable(GL_TEXTURE_2D); 220 glEnable(GL_TEXTURE_EXTERNAL_OES); 221 } 222 223 void GLES11RenderEngine::setupLayerBlackedOut() { 224 glBindTexture(GL_TEXTURE_2D, mProtectedTexName); 225 glMatrixMode(GL_TEXTURE); 226 glLoadIdentity(); 227 glMatrixMode(GL_MODELVIEW); 228 glDisable(GL_TEXTURE_EXTERNAL_OES); 229 glEnable(GL_TEXTURE_2D); 230 } 231 232 void GLES11RenderEngine::disableTexturing() { 233 glDisable(GL_TEXTURE_EXTERNAL_OES); 234 glDisable(GL_TEXTURE_2D); 235 } 236 237 void GLES11RenderEngine::disableBlending() { 238 glDisable(GL_BLEND); 239 } 240 241 void GLES11RenderEngine::bindImageAsFramebuffer(EGLImageKHR image, 242 uint32_t* texName, uint32_t* fbName, uint32_t* status) { 243 GLuint tname, name; 244 // turn our EGLImage into a texture 245 glGenTextures(1, &tname); 246 glBindTexture(GL_TEXTURE_2D, tname); 247 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image); 248 249 // create a Framebuffer Object to render into 250 glGenFramebuffersOES(1, &name); 251 glBindFramebufferOES(GL_FRAMEBUFFER_OES, name); 252 glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES, 253 GL_COLOR_ATTACHMENT0_OES, GL_TEXTURE_2D, tname, 0); 254 255 *status = glCheckFramebufferStatusOES(GL_FRAMEBUFFER_OES); 256 *texName = tname; 257 *fbName = name; 258 } 259 260 void GLES11RenderEngine::unbindFramebuffer(uint32_t texName, uint32_t fbName) { 261 glBindFramebufferOES(GL_FRAMEBUFFER_OES, 0); 262 glDeleteFramebuffersOES(1, &fbName); 263 glDeleteTextures(1, &texName); 264 } 265 266 void GLES11RenderEngine::setupFillWithColor(float r, float g, float b, float a) { 267 glColor4f(r, g, b, a); 268 glDisable(GL_TEXTURE_EXTERNAL_OES); 269 glDisable(GL_TEXTURE_2D); 270 glDisable(GL_BLEND); 271 } 272 273 void GLES11RenderEngine::drawMesh(const Mesh& mesh) { 274 if (mesh.getTexCoordsSize()) { 275 glEnableClientState(GL_TEXTURE_COORD_ARRAY); 276 glTexCoordPointer(mesh.getTexCoordsSize(), 277 GL_FLOAT, 278 mesh.getByteStride(), 279 mesh.getTexCoords()); 280 } 281 282 glVertexPointer(mesh.getVertexSize(), 283 GL_FLOAT, 284 mesh.getByteStride(), 285 mesh.getPositions()); 286 287 glDrawArrays(mesh.getPrimitive(), 0, mesh.getVertexCount()); 288 289 if (mesh.getTexCoordsSize()) { 290 glDisableClientState(GL_TEXTURE_COORD_ARRAY); 291 } 292 } 293 294 void GLES11RenderEngine::dump(String8& result) { 295 RenderEngine::dump(result); 296 } 297 298 // --------------------------------------------------------------------------- 299 }; // namespace android 300 // --------------------------------------------------------------------------- 301 302 #if defined(__gl2_h_) 303 #error "don't include gl2/gl2.h in this file" 304 #endif 305
