Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2010 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 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 17 | #define LOG_TAG "OpenGLRenderer" |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 18 | |
| 19 | #include <stdlib.h> |
| 20 | #include <stdint.h> |
| 21 | #include <sys/types.h> |
| 22 | |
| 23 | #include <utils/Errors.h> |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 24 | #include <utils/KeyedVector.h> |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 25 | #include <utils/Log.h> |
| 26 | |
| 27 | #include <GLES2/gl2.h> |
| 28 | #include <GLES2/gl2ext.h> |
| 29 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 30 | #include <SkXfermode.h> |
| 31 | |
| 32 | #include "OpenGLRenderer.h" |
| 33 | #include "Matrix.h" |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 34 | |
| 35 | namespace android { |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 36 | namespace uirenderer { |
| 37 | |
| 38 | /////////////////////////////////////////////////////////////////////////////// |
| 39 | // Defines |
| 40 | /////////////////////////////////////////////////////////////////////////////// |
| 41 | |
| 42 | #define SOLID_WHITE { 1.0f, 1.0f, 1.0f, 1.0f } |
| 43 | |
| 44 | #define P(x, y) { x, y } |
| 45 | |
| 46 | /////////////////////////////////////////////////////////////////////////////// |
| 47 | // Globals |
| 48 | /////////////////////////////////////////////////////////////////////////////// |
| 49 | |
| 50 | const Vertex gDrawColorVertices[] = { |
| 51 | { P(0.0f, 0.0f), SOLID_WHITE }, |
| 52 | { P(1.0f, 0.0f), SOLID_WHITE }, |
| 53 | { P(0.0f, 1.0f), SOLID_WHITE }, |
| 54 | { P(1.0f, 1.0f), SOLID_WHITE } |
| 55 | }; |
| 56 | |
| 57 | /////////////////////////////////////////////////////////////////////////////// |
| 58 | // Shaders |
| 59 | /////////////////////////////////////////////////////////////////////////////// |
| 60 | |
| 61 | #define SHADER_SOURCE(name, source) const char* name = #source |
| 62 | |
| 63 | #include "shaders/drawColor.vert" |
| 64 | #include "shaders/drawColor.frag" |
| 65 | |
| 66 | Program::Program(const char* vertex, const char* fragment) { |
| 67 | vertexShader = buildShader(vertex, GL_VERTEX_SHADER); |
| 68 | fragmentShader = buildShader(fragment, GL_FRAGMENT_SHADER); |
| 69 | |
| 70 | id = glCreateProgram(); |
| 71 | glAttachShader(id, vertexShader); |
| 72 | glAttachShader(id, fragmentShader); |
| 73 | glLinkProgram(id); |
| 74 | |
| 75 | GLint status; |
| 76 | glGetProgramiv(id, GL_LINK_STATUS, &status); |
| 77 | if (status != GL_TRUE) { |
| 78 | GLint infoLen = 0; |
| 79 | glGetProgramiv(id, GL_INFO_LOG_LENGTH, &infoLen); |
| 80 | if (infoLen > 1) { |
| 81 | char* log = (char*) malloc(sizeof(char) * infoLen); |
| 82 | glGetProgramInfoLog(id, infoLen, 0, log); |
| 83 | LOGE("Error while linking shaders: %s", log); |
| 84 | delete log; |
| 85 | } |
| 86 | glDeleteProgram(id); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | Program::~Program() { |
| 91 | glDeleteShader(vertexShader); |
| 92 | glDeleteShader(fragmentShader); |
| 93 | glDeleteProgram(id); |
| 94 | } |
| 95 | |
| 96 | void Program::use() { |
| 97 | glUseProgram(id); |
| 98 | } |
| 99 | |
| 100 | int Program::addAttrib(const char* name) { |
| 101 | int slot = glGetAttribLocation(id, name); |
| 102 | attributes.add(name, slot); |
| 103 | return slot; |
| 104 | } |
| 105 | |
| 106 | int Program::getAttrib(const char* name) { |
| 107 | return attributes.valueFor(name); |
| 108 | } |
| 109 | |
| 110 | int Program::addUniform(const char* name) { |
| 111 | int slot = glGetUniformLocation(id, name); |
| 112 | uniforms.add(name, slot); |
| 113 | return slot; |
| 114 | } |
| 115 | |
| 116 | int Program::getUniform(const char* name) { |
| 117 | return uniforms.valueFor(name); |
| 118 | } |
| 119 | |
| 120 | GLuint Program::buildShader(const char* source, GLenum type) { |
| 121 | GLuint shader = glCreateShader(type); |
| 122 | glShaderSource(shader, 1, &source, 0); |
| 123 | glCompileShader(shader); |
| 124 | |
| 125 | GLint status; |
| 126 | glGetShaderiv(shader, GL_COMPILE_STATUS, &status); |
| 127 | if (status != GL_TRUE) { |
| 128 | // Some drivers return wrong values for GL_INFO_LOG_LENGTH |
| 129 | // use a fixed size instead |
| 130 | GLchar log[512]; |
| 131 | glGetShaderInfoLog(shader, sizeof(log), 0, &log[0]); |
| 132 | LOGE("Error while compiling shader: %s", log); |
| 133 | glDeleteShader(shader); |
| 134 | } |
| 135 | |
| 136 | return shader; |
| 137 | } |
| 138 | |
| 139 | DrawColorProgram::DrawColorProgram(): |
| 140 | Program(gDrawColorVertexShader, gDrawColorFragmentShader) { |
| 141 | position = addAttrib("position"); |
| 142 | color = addAttrib("color"); |
| 143 | projection = addUniform("projection"); |
| 144 | modelView = addUniform("modelView"); |
| 145 | } |
| 146 | |
| 147 | /////////////////////////////////////////////////////////////////////////////// |
| 148 | // Support |
| 149 | /////////////////////////////////////////////////////////////////////////////// |
| 150 | |
| 151 | const Rect& Snapshot::getMappedClip() { |
| 152 | if (flags & kFlagDirtyTransform) { |
| 153 | flags &= ~kFlagDirtyTransform; |
| 154 | mappedClip.set(clipRect); |
| 155 | transform.mapRect(mappedClip); |
| 156 | } |
| 157 | return mappedClip; |
| 158 | } |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 159 | |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 160 | /////////////////////////////////////////////////////////////////////////////// |
| 161 | // Constructors/destructor |
| 162 | /////////////////////////////////////////////////////////////////////////////// |
| 163 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 164 | OpenGLRenderer::OpenGLRenderer() { |
| 165 | LOGD("Create OpenGLRenderer"); |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 166 | |
| 167 | mDrawColorShader = new DrawColorProgram; |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 168 | } |
| 169 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 170 | OpenGLRenderer::~OpenGLRenderer() { |
| 171 | LOGD("Destroy OpenGLRenderer"); |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 172 | } |
| 173 | |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 174 | /////////////////////////////////////////////////////////////////////////////// |
| 175 | // Setup |
| 176 | /////////////////////////////////////////////////////////////////////////////// |
| 177 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 178 | void OpenGLRenderer::setViewport(int width, int height) { |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 179 | glViewport(0, 0, width, height); |
| 180 | |
| 181 | mat4 ortho; |
| 182 | ortho.loadOrtho(0, width, height, 0, 0, 1); |
| 183 | ortho.copyTo(mOrthoMatrix); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 184 | |
| 185 | mWidth = width; |
| 186 | mHeight = height; |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 189 | void OpenGLRenderer::prepare() { |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 190 | mSnapshot = &mFirstSnapshot; |
| 191 | mSaveCount = 0; |
| 192 | |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 193 | glDisable(GL_SCISSOR_TEST); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 194 | |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 195 | glClearColor(0.0f, 0.0f, 0.0f, 0.0f); |
| 196 | glClear(GL_COLOR_BUFFER_BIT); |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 197 | |
Romain Guy | 08ae317 | 2010-06-21 19:35:50 -0700 | [diff] [blame] | 198 | glEnable(GL_SCISSOR_TEST); |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 199 | |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 200 | mSnapshot->clipRect.set(0.0f, 0.0f, mWidth, mHeight); |
| 201 | } |
| 202 | |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 203 | /////////////////////////////////////////////////////////////////////////////// |
| 204 | // State management |
| 205 | /////////////////////////////////////////////////////////////////////////////// |
| 206 | |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 207 | int OpenGLRenderer::getSaveCount() const { |
| 208 | return mSaveCount; |
| 209 | } |
| 210 | |
| 211 | int OpenGLRenderer::save(int flags) { |
| 212 | return saveSnapshot(); |
| 213 | } |
| 214 | |
| 215 | void OpenGLRenderer::restore() { |
| 216 | if (mSaveCount == 0) return; |
| 217 | |
| 218 | if (restoreSnapshot()) { |
| 219 | setScissorFromClip(); |
| 220 | } |
| 221 | } |
| 222 | |
| 223 | void OpenGLRenderer::restoreToCount(int saveCount) { |
| 224 | if (saveCount <= 0 || saveCount > mSaveCount) return; |
| 225 | |
| 226 | bool restoreClip = false; |
| 227 | |
| 228 | while (mSaveCount != saveCount - 1) { |
| 229 | restoreClip |= restoreSnapshot(); |
| 230 | } |
| 231 | |
| 232 | if (restoreClip) { |
| 233 | setScissorFromClip(); |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | int OpenGLRenderer::saveSnapshot() { |
| 238 | mSnapshot = new Snapshot(mSnapshot); |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 239 | return ++mSaveCount; |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 240 | } |
| 241 | |
| 242 | bool OpenGLRenderer::restoreSnapshot() { |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 243 | bool restoreClip = mSnapshot->flags & Snapshot::kFlagClipSet; |
| 244 | |
| 245 | mSaveCount--; |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 246 | |
| 247 | // Do not merge these two lines! |
| 248 | sp<Snapshot> previous = mSnapshot->previous; |
| 249 | mSnapshot = previous; |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 250 | |
| 251 | return restoreClip; |
| 252 | } |
| 253 | |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 254 | /////////////////////////////////////////////////////////////////////////////// |
| 255 | // Transforms |
| 256 | /////////////////////////////////////////////////////////////////////////////// |
| 257 | |
| 258 | void OpenGLRenderer::translate(float dx, float dy) { |
| 259 | mSnapshot->transform.translate(dx, dy, 0.0f); |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 260 | mSnapshot->flags |= Snapshot::kFlagDirtyTransform; |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 261 | } |
| 262 | |
| 263 | void OpenGLRenderer::rotate(float degrees) { |
| 264 | mSnapshot->transform.rotate(degrees, 0.0f, 0.0f, 1.0f); |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 265 | mSnapshot->flags |= Snapshot::kFlagDirtyTransform; |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | void OpenGLRenderer::scale(float sx, float sy) { |
| 269 | mSnapshot->transform.scale(sx, sy, 1.0f); |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 270 | mSnapshot->flags |= Snapshot::kFlagDirtyTransform; |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 271 | } |
| 272 | |
| 273 | void OpenGLRenderer::setMatrix(SkMatrix* matrix) { |
| 274 | mSnapshot->transform.load(*matrix); |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 275 | mSnapshot->flags |= Snapshot::kFlagDirtyTransform; |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | void OpenGLRenderer::getMatrix(SkMatrix* matrix) { |
| 279 | mSnapshot->transform.copyTo(*matrix); |
| 280 | } |
| 281 | |
| 282 | void OpenGLRenderer::concatMatrix(SkMatrix* matrix) { |
| 283 | mat4 m(*matrix); |
| 284 | mSnapshot->transform.multiply(m); |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 285 | mSnapshot->flags |= Snapshot::kFlagDirtyTransform; |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 286 | } |
| 287 | |
| 288 | /////////////////////////////////////////////////////////////////////////////// |
| 289 | // Clipping |
| 290 | /////////////////////////////////////////////////////////////////////////////// |
| 291 | |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 292 | void OpenGLRenderer::setScissorFromClip() { |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 293 | const Rect& clip = mSnapshot->getMappedClip(); |
| 294 | glScissor(clip.left, clip.top, clip.getWidth(), clip.getHeight()); |
| 295 | } |
| 296 | |
| 297 | const Rect& OpenGLRenderer::getClipBounds() { |
| 298 | return mSnapshot->clipRect; |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | bool OpenGLRenderer::clipRect(float left, float top, float right, float bottom) { |
Romain Guy | bb9524b | 2010-06-22 18:56:38 -0700 | [diff] [blame] | 302 | bool clipped = mSnapshot->clipRect.intersect(left, top, right, bottom); |
| 303 | if (clipped) { |
| 304 | mSnapshot->flags |= Snapshot::kFlagClipSet; |
| 305 | setScissorFromClip(); |
| 306 | } |
| 307 | return clipped; |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 308 | } |
| 309 | |
Romain Guy | f6a11b8 | 2010-06-23 17:47:49 -0700 | [diff] [blame] | 310 | /////////////////////////////////////////////////////////////////////////////// |
| 311 | // Drawing |
| 312 | /////////////////////////////////////////////////////////////////////////////// |
| 313 | |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 314 | void OpenGLRenderer::drawColor(int color, SkXfermode::Mode mode) { |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 315 | GLfloat a = ((color >> 24) & 0xFF) / 255.0f; |
| 316 | GLfloat r = ((color >> 16) & 0xFF) / 255.0f; |
| 317 | GLfloat g = ((color >> 8) & 0xFF) / 255.0f; |
| 318 | GLfloat b = ((color ) & 0xFF) / 255.0f; |
| 319 | |
| 320 | // TODO Optimize this section |
| 321 | const Rect& clip = mSnapshot->getMappedClip(); |
| 322 | |
| 323 | mat4 modelView; |
| 324 | modelView.loadScale(clip.getWidth(), clip.getHeight(), 1.0f); |
| 325 | modelView.translate(clip.left, clip.top, 0.0f); |
| 326 | |
| 327 | float matrix[16]; |
| 328 | modelView.copyTo(matrix); |
| 329 | // TODO Optimize this section |
| 330 | |
| 331 | mDrawColorShader->use(); |
| 332 | |
| 333 | glUniformMatrix4fv(mDrawColorShader->projection, 1, GL_FALSE, &mOrthoMatrix[0]); |
| 334 | glUniformMatrix4fv(mDrawColorShader->modelView, 1, GL_FALSE, &matrix[0]); |
| 335 | |
| 336 | glEnableVertexAttribArray(mDrawColorShader->position); |
| 337 | |
| 338 | GLsizei stride = sizeof(Vertex); |
| 339 | const GLvoid* p = &gDrawColorVertices[0].position[0]; |
| 340 | |
| 341 | glVertexAttribPointer(mDrawColorShader->position, 2, GL_FLOAT, GL_FALSE, stride, p); |
| 342 | glVertexAttrib4f(mDrawColorShader->color, r, g, b, a); |
| 343 | |
| 344 | GLsizei vertexCount = sizeof(gDrawColorVertices) / sizeof(Vertex); |
| 345 | glDrawArrays(GL_TRIANGLE_STRIP, 0, vertexCount); |
| 346 | |
| 347 | glDisableVertexAttribArray(mDrawColorShader->position); |
| 348 | glDisableVertexAttribArray(mDrawColorShader->color); |
Romain Guy | 85bf02f | 2010-06-22 13:11:24 -0700 | [diff] [blame] | 349 | } |
| 350 | |
Romain Guy | 9d5316e | 2010-06-24 19:30:36 -0700 | [diff] [blame^] | 351 | }; // namespace uirenderer |
Romain Guy | e4d0112 | 2010-06-16 18:44:05 -0700 | [diff] [blame] | 352 | }; // namespace android |