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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "ui/gfx/compositor/compositor_gl.h" | |
| 6 | |
| 7 #include "base/basictypes.h" | |
| 8 #include "base/command_line.h" | |
| 9 #include "base/compiler_specific.h" | |
| 10 #include "base/debug/trace_event.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "base/memory/scoped_ptr.h" | |
| 13 #include "base/memory/singleton.h" | |
| 14 #include "base/threading/thread_restrictions.h" | |
| 15 #include "third_party/skia/include/core/SkBitmap.h" | |
| 16 #include "third_party/skia/include/core/SkDevice.h" | |
| 17 #include "third_party/skia/include/core/SkMatrix.h" | |
| 18 #include "third_party/skia/include/core/SkPoint.h" | |
| 19 #include "third_party/skia/include/core/SkRect.h" | |
| 20 #include "third_party/skia/include/core/SkScalar.h" | |
| 21 #include "ui/gfx/compositor/compositor_switches.h" | |
| 22 #include "ui/gfx/rect.h" | |
| 23 #include "ui/gfx/transform.h" | |
| 24 #include "ui/gfx/gl/gl_bindings.h" | |
| 25 #include "ui/gfx/gl/gl_context.h" | |
| 26 #include "ui/gfx/gl/gl_implementation.h" | |
| 27 #include "ui/gfx/gl/gl_surface.h" | |
| 28 | |
| 29 // Wraps a simple GL program for drawing textures to the screen. | |
| 30 // Need the declaration before the subclasses in the anonymous namespace below. | |
| 31 class ui::TextureProgramGL { | |
| 32 public: | |
| 33 TextureProgramGL(); | |
| 34 virtual ~TextureProgramGL() {} | |
| 35 | |
| 36 // Returns false if it was unable to initialize properly. | |
| 37 // | |
| 38 // Host GL context must be current when this is called. | |
| 39 virtual bool Initialize() = 0; | |
| 40 | |
| 41 // Make the program active in the current GL context. | |
| 42 void Use() const { glUseProgram(program_); } | |
| 43 | |
| 44 // Location of vertex position attribute in vertex shader. | |
| 45 GLuint a_pos_loc() const { return a_pos_loc_; } | |
| 46 | |
| 47 // Location of texture co-ordinate attribute in vertex shader. | |
| 48 GLuint a_tex_loc() const { return a_tex_loc_; } | |
| 49 | |
| 50 // Location of the alpha multiplier uniform in the vertex shader. | |
| 51 GLuint u_alpha_loc() const { return u_alpha_loc_; } | |
| 52 | |
| 53 // Location of transformation matrix uniform in vertex shader. | |
| 54 GLuint u_mat_loc() const { return u_mat_loc_; } | |
| 55 | |
| 56 // Location of texture unit uniform that we texture map from | |
| 57 // in the fragment shader. | |
| 58 GLuint u_tex_loc() const { return u_tex_loc_; } | |
| 59 | |
| 60 protected: | |
| 61 // Only the fragment shaders differ. This handles the initialization | |
| 62 // of all the other fields. | |
| 63 bool InitializeCommon(); | |
| 64 | |
| 65 GLuint frag_shader_; | |
| 66 | |
| 67 private: | |
| 68 GLuint program_; | |
| 69 GLuint vertex_shader_; | |
| 70 | |
| 71 GLuint a_pos_loc_; | |
| 72 GLuint a_tex_loc_; | |
| 73 GLuint u_alpha_loc_; | |
| 74 GLuint u_tex_loc_; | |
| 75 GLuint u_mat_loc_; | |
| 76 }; | |
| 77 | |
| 78 namespace { | |
| 79 | |
| 80 class TextureProgramNoSwizzleGL : public ui::TextureProgramGL { | |
| 81 public: | |
| 82 TextureProgramNoSwizzleGL() {} | |
| 83 virtual bool Initialize(); | |
| 84 private: | |
| 85 DISALLOW_COPY_AND_ASSIGN(TextureProgramNoSwizzleGL); | |
| 86 }; | |
| 87 | |
| 88 class TextureProgramSwizzleGL : public ui::TextureProgramGL { | |
| 89 public: | |
| 90 TextureProgramSwizzleGL() {} | |
| 91 virtual bool Initialize(); | |
| 92 private: | |
| 93 DISALLOW_COPY_AND_ASSIGN(TextureProgramSwizzleGL); | |
| 94 }; | |
| 95 | |
| 96 GLuint CompileShader(GLenum type, const GLchar* source) { | |
| 97 GLuint shader = glCreateShader(type); | |
| 98 if (!shader) | |
| 99 return 0; | |
| 100 | |
| 101 glShaderSource(shader, 1, &source, 0); | |
| 102 glCompileShader(shader); | |
| 103 | |
| 104 GLint compiled; | |
| 105 glGetShaderiv(shader, GL_COMPILE_STATUS, &compiled); | |
| 106 if (!compiled) { | |
| 107 GLint info_len = 0; | |
| 108 glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &info_len); | |
| 109 | |
| 110 if (info_len > 0) { | |
| 111 scoped_array<char> info_log(new char[info_len]); | |
| 112 glGetShaderInfoLog(shader, info_len, NULL, info_log.get()); | |
| 113 LOG(ERROR) << "Compile error: " << info_log.get(); | |
| 114 return 0; | |
| 115 } | |
| 116 } | |
| 117 return shader; | |
| 118 } | |
| 119 | |
| 120 bool TextureProgramNoSwizzleGL::Initialize() { | |
| 121 const bool debug_overdraw = CommandLine::ForCurrentProcess()->HasSwitch( | |
| 122 switches::kEnableCompositorOverdrawDebugging); | |
| 123 | |
| 124 if (debug_overdraw) { | |
| 125 const GLchar* frag_shader_source = | |
| 126 "#ifdef GL_ES\n" | |
| 127 "precision mediump float;\n" | |
| 128 "#endif\n" | |
| 129 "uniform sampler2D u_tex;" | |
| 130 "varying vec2 v_texCoord;" | |
| 131 "void main()" | |
| 132 "{" | |
| 133 " gl_FragColor = texture2D(u_tex, v_texCoord);" | |
| 134 " gl_FragColor.a = 1.0;" | |
| 135 " gl_FragColor = gl_FragColor * 0.25;" | |
| 136 " gl_FragColor = gl_FragColor + vec4(0.75, 0.75, 0.75, 0.75);" | |
| 137 " gl_FragColor = gl_FragColor * 0.3333333;" | |
| 138 "}"; | |
| 139 frag_shader_ = CompileShader(GL_FRAGMENT_SHADER, frag_shader_source); | |
| 140 } else { | |
| 141 const GLchar* frag_shader_source = | |
| 142 "#ifdef GL_ES\n" | |
| 143 "precision mediump float;\n" | |
| 144 "#endif\n" | |
| 145 "uniform float u_alpha;" | |
| 146 "uniform sampler2D u_tex;" | |
| 147 "varying vec2 v_texCoord;" | |
| 148 "void main()" | |
| 149 "{" | |
| 150 " gl_FragColor = texture2D(u_tex, v_texCoord);" | |
| 151 " if (u_alpha > 0.0)" | |
| 152 " gl_FragColor.a = u_alpha;" | |
| 153 " else" | |
| 154 " gl_FragColor.a = gl_FragColor.a * -u_alpha;" | |
| 155 "}"; | |
| 156 frag_shader_ = CompileShader(GL_FRAGMENT_SHADER, frag_shader_source); | |
| 157 } | |
| 158 | |
| 159 if (!frag_shader_) | |
| 160 return false; | |
| 161 | |
| 162 return InitializeCommon(); | |
| 163 } | |
| 164 | |
| 165 bool TextureProgramSwizzleGL::Initialize() { | |
| 166 const bool debug_overdraw = CommandLine::ForCurrentProcess()->HasSwitch( | |
| 167 switches::kEnableCompositorOverdrawDebugging); | |
| 168 | |
| 169 if (debug_overdraw) { | |
| 170 const GLchar* frag_shader_source = | |
| 171 "#ifdef GL_ES\n" | |
| 172 "precision mediump float;\n" | |
| 173 "#endif\n" | |
| 174 "uniform sampler2D u_tex;" | |
| 175 "varying vec2 v_texCoord;" | |
| 176 "void main()" | |
| 177 "{" | |
| 178 " gl_FragColor = texture2D(u_tex, v_texCoord).zyxw;" | |
| 179 " gl_FragColor.a = 1.0;" | |
| 180 " gl_FragColor = gl_FragColor * 0.25;" | |
| 181 " gl_FragColor = gl_FragColor + vec4(0.75, 0.75, 0.75, 0.75);" | |
| 182 " gl_FragColor = gl_FragColor * 0.3333333;" | |
| 183 "}"; | |
| 184 frag_shader_ = CompileShader(GL_FRAGMENT_SHADER, frag_shader_source); | |
| 185 } else { | |
| 186 const GLchar* frag_shader_source = | |
| 187 "#ifdef GL_ES\n" | |
| 188 "precision mediump float;\n" | |
| 189 "#endif\n" | |
| 190 "uniform float u_alpha;" | |
| 191 "uniform sampler2D u_tex;" | |
| 192 "varying vec2 v_texCoord;" | |
| 193 "void main()" | |
| 194 "{" | |
| 195 " gl_FragColor = texture2D(u_tex, v_texCoord).zyxw;" | |
| 196 " if (u_alpha > 0.0)" | |
| 197 " gl_FragColor.a = u_alpha;" | |
| 198 " else" | |
| 199 " gl_FragColor.a = gl_FragColor.a * -u_alpha;" | |
| 200 "}"; | |
| 201 frag_shader_ = CompileShader(GL_FRAGMENT_SHADER, frag_shader_source); | |
| 202 } | |
| 203 | |
| 204 if (!frag_shader_) | |
| 205 return false; | |
| 206 | |
| 207 return InitializeCommon(); | |
| 208 } | |
| 209 | |
| 210 } // namespace | |
| 211 | |
| 212 namespace ui { | |
| 213 | |
| 214 TextureProgramGL::TextureProgramGL() | |
| 215 : program_(0), | |
| 216 a_pos_loc_(0), | |
| 217 a_tex_loc_(0), | |
| 218 u_alpha_loc_(0), | |
| 219 u_tex_loc_(0), | |
| 220 u_mat_loc_(0) { | |
| 221 } | |
| 222 | |
| 223 bool TextureProgramGL::InitializeCommon() { | |
| 224 const GLchar* vertex_shader_source = | |
| 225 "attribute vec4 a_position;" | |
| 226 "attribute vec2 a_texCoord;" | |
| 227 "uniform mat4 u_matViewProjection;" | |
| 228 "varying vec2 v_texCoord;" | |
| 229 "void main()" | |
| 230 "{" | |
| 231 " gl_Position = u_matViewProjection * a_position;" | |
| 232 " v_texCoord = a_texCoord;" | |
| 233 "}"; | |
| 234 | |
| 235 vertex_shader_ = CompileShader(GL_VERTEX_SHADER, vertex_shader_source); | |
| 236 if (!vertex_shader_) | |
| 237 return false; | |
| 238 | |
| 239 program_ = glCreateProgram(); | |
| 240 glAttachShader(program_, vertex_shader_); | |
| 241 glAttachShader(program_, frag_shader_); | |
| 242 glLinkProgram(program_); | |
| 243 | |
| 244 if (glGetError() != GL_NO_ERROR) | |
| 245 return false; | |
| 246 | |
| 247 // Store locations of program inputs. | |
| 248 a_pos_loc_ = glGetAttribLocation(program_, "a_position"); | |
| 249 a_tex_loc_ = glGetAttribLocation(program_, "a_texCoord"); | |
| 250 u_alpha_loc_ = glGetUniformLocation(program_, "u_alpha"); | |
| 251 u_tex_loc_ = glGetUniformLocation(program_, "u_tex"); | |
| 252 u_mat_loc_ = glGetUniformLocation(program_, "u_matViewProjection"); | |
| 253 | |
| 254 return true; | |
| 255 } | |
| 256 | |
| 257 SharedResourcesGL::SharedResourcesGL() : initialized_(false) { | |
| 258 } | |
| 259 | |
| 260 | |
| 261 SharedResourcesGL::~SharedResourcesGL() { | |
| 262 } | |
| 263 | |
| 264 // static | |
| 265 SharedResourcesGL* SharedResourcesGL::GetInstance() { | |
| 266 // We use LeakySingletonTraits so that we don't race with | |
| 267 // the tear down of the gl_bindings. | |
| 268 SharedResourcesGL* instance = Singleton<SharedResourcesGL, | |
| 269 LeakySingletonTraits<SharedResourcesGL> >::get(); | |
| 270 if (instance->Initialize()) { | |
| 271 return instance; | |
| 272 } else { | |
| 273 instance->Destroy(); | |
| 274 return NULL; | |
| 275 } | |
| 276 } | |
| 277 | |
| 278 bool SharedResourcesGL::Initialize() { | |
| 279 if (initialized_) | |
| 280 return true; | |
| 281 | |
| 282 { | |
| 283 // The following line of code exists soley to disable IO restrictions | |
| 284 // on this thread long enough to perform the GL bindings. | |
| 285 // TODO(wjmaclean) Remove this when GL initialisation cleaned up. | |
| 286 base::ThreadRestrictions::ScopedAllowIO allow_io; | |
| 287 if (!gfx::GLSurface::InitializeOneOff() || | |
| 288 gfx::GetGLImplementation() == gfx::kGLImplementationNone) { | |
| 289 LOG(ERROR) << "Could not load the GL bindings"; | |
| 290 return false; | |
| 291 } | |
| 292 } | |
| 293 | |
| 294 surface_ = gfx::GLSurface::CreateOffscreenGLSurface(false, gfx::Size(1, 1)); | |
| 295 if (!surface_.get()) { | |
| 296 LOG(ERROR) << "Unable to create offscreen GL surface."; | |
| 297 return false; | |
| 298 } | |
| 299 | |
| 300 context_ = gfx::GLContext::CreateGLContext( | |
| 301 NULL, | |
| 302 surface_.get(), | |
| 303 gfx::PreferIntegratedGpu); | |
| 304 if (!context_.get()) { | |
| 305 LOG(ERROR) << "Unable to create GL context."; | |
| 306 return false; | |
| 307 } | |
| 308 | |
| 309 program_no_swizzle_.reset(); | |
| 310 program_swizzle_.reset(); | |
| 311 | |
| 312 context_->MakeCurrent(surface_.get()); | |
| 313 | |
| 314 scoped_ptr<ui::TextureProgramGL> temp_program_no_swizzle( | |
| 315 new TextureProgramNoSwizzleGL()); | |
| 316 if (!temp_program_no_swizzle->Initialize()) { | |
| 317 LOG(ERROR) << "Unable to initialize shader."; | |
| 318 return false; | |
| 319 } | |
| 320 | |
| 321 scoped_ptr<ui::TextureProgramGL> temp_program_swizzle( | |
| 322 new TextureProgramSwizzleGL()); | |
| 323 if (!temp_program_swizzle->Initialize()) { | |
| 324 LOG(ERROR) << "Unable to initialize shader."; | |
| 325 return false; | |
| 326 } | |
| 327 | |
| 328 program_no_swizzle_.swap(temp_program_no_swizzle); | |
| 329 program_swizzle_.swap(temp_program_swizzle); | |
| 330 | |
| 331 initialized_ = true; | |
| 332 return true; | |
| 333 } | |
| 334 | |
| 335 void SharedResourcesGL::Destroy() { | |
| 336 program_swizzle_.reset(); | |
| 337 program_no_swizzle_.reset(); | |
| 338 | |
| 339 context_ = NULL; | |
| 340 surface_ = NULL; | |
| 341 | |
| 342 initialized_ = false; | |
| 343 } | |
| 344 | |
| 345 gfx::ScopedMakeCurrent* SharedResourcesGL::GetScopedMakeCurrent() { | |
| 346 DCHECK(initialized_); | |
| 347 if (initialized_) | |
| 348 return new gfx::ScopedMakeCurrent(context_.get(), surface_.get()); | |
| 349 else | |
| 350 return NULL; | |
| 351 } | |
| 352 | |
| 353 scoped_refptr<gfx::GLContext> SharedResourcesGL::CreateContext( | |
| 354 gfx::GLSurface* surface) { | |
| 355 if (initialized_) | |
| 356 return gfx::GLContext::CreateGLContext( | |
| 357 context_->share_group(), | |
| 358 surface, | |
| 359 gfx::PreferIntegratedGpu); | |
| 360 else | |
| 361 return NULL; | |
| 362 } | |
| 363 | |
| 364 void* SharedResourcesGL::GetDisplay() { | |
| 365 return surface_->GetDisplay(); | |
| 366 } | |
| 367 | |
| 368 TextureGL::TextureGL() : texture_id_(0) { | |
| 369 } | |
| 370 | |
| 371 TextureGL::TextureGL(const gfx::Size& size) : texture_id_(0), size_(size) { | |
| 372 } | |
| 373 | |
| 374 TextureGL::~TextureGL() { | |
| 375 if (texture_id_) { | |
| 376 SharedResourcesGL* instance = SharedResourcesGL::GetInstance(); | |
| 377 DCHECK(instance); | |
| 378 scoped_ptr<gfx::ScopedMakeCurrent> bind(instance->GetScopedMakeCurrent()); | |
| 379 glDeleteTextures(1, &texture_id_); | |
| 380 } | |
| 381 } | |
| 382 | |
| 383 void TextureGL::SetCanvas(const SkCanvas& canvas, | |
| 384 const gfx::Point& origin, | |
| 385 const gfx::Size& overall_size) { | |
| 386 TRACE_EVENT0("ui", "TextureGL::SetCanvas"); | |
| 387 const SkBitmap& bitmap = canvas.getDevice()->accessBitmap(false); | |
| 388 // Verify bitmap pixels are contiguous. | |
| 389 DCHECK_EQ(bitmap.rowBytes(), | |
| 390 SkBitmap::ComputeRowBytes(bitmap.config(), bitmap.width())); | |
| 391 SkAutoLockPixels lock(bitmap); | |
| 392 void* pixels = bitmap.getPixels(); | |
| 393 | |
| 394 if (!texture_id_) { | |
| 395 // Texture needs to be created. We assume the first call is for | |
| 396 // a full-sized canvas. | |
| 397 size_ = overall_size; | |
| 398 | |
| 399 glGenTextures(1, &texture_id_); | |
| 400 glBindTexture(GL_TEXTURE_2D, texture_id_); | |
| 401 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, | |
| 402 size_.width(), size_.height(), 0, | |
| 403 GL_RGBA, GL_UNSIGNED_BYTE, NULL); | |
| 404 | |
| 405 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); | |
| 406 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); | |
| 407 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); | |
| 408 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); | |
| 409 } else if (size_ != overall_size) { // Size has changed. | |
| 410 size_ = overall_size; | |
| 411 glBindTexture(GL_TEXTURE_2D, texture_id_); | |
| 412 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, | |
| 413 size_.width(), size_.height(), 0, | |
| 414 GL_RGBA, GL_UNSIGNED_BYTE, NULL); | |
| 415 } else { | |
| 416 glBindTexture(GL_TEXTURE_2D, texture_id_); | |
| 417 } | |
| 418 glTexSubImage2D(GL_TEXTURE_2D, 0, origin.x(), origin.y(), | |
| 419 bitmap.width(), bitmap.height(), | |
| 420 GL_RGBA, GL_UNSIGNED_BYTE, pixels); | |
| 421 } | |
| 422 | |
| 423 void TextureGL::Draw(const ui::TextureDrawParams& params, | |
| 424 const gfx::Rect& clip_bounds_in_texture) { | |
| 425 TRACE_EVENT0("ui", "TextureGL::Draw"); | |
| 426 SharedResourcesGL* instance = SharedResourcesGL::GetInstance(); | |
| 427 DCHECK(instance); | |
| 428 DrawInternal(*instance->program_swizzle(), | |
| 429 params, | |
| 430 clip_bounds_in_texture); | |
| 431 } | |
| 432 | |
| 433 void TextureGL::DrawInternal(const ui::TextureProgramGL& program, | |
| 434 const ui::TextureDrawParams& params, | |
| 435 const gfx::Rect& clip_bounds_in_texture) { | |
| 436 // Clip clip_bounds_in_texture to size of texture. | |
| 437 gfx::Rect clip_bounds = clip_bounds_in_texture.Intersect( | |
| 438 gfx::Rect(gfx::Point(0, 0), size_)); | |
| 439 | |
| 440 // Verify that compositor_size has been set. | |
| 441 DCHECK(params.compositor_size != gfx::Size(0, 0)); | |
| 442 | |
| 443 if (params.blend) | |
| 444 glEnable(GL_BLEND); | |
| 445 else | |
| 446 glDisable(GL_BLEND); | |
| 447 | |
| 448 program.Use(); | |
| 449 | |
| 450 glActiveTexture(GL_TEXTURE0); | |
| 451 glUniform1i(program.u_tex_loc(), 0); | |
| 452 glBindTexture(GL_TEXTURE_2D, texture_id_); | |
| 453 | |
| 454 ui::Transform t; | |
| 455 t.ConcatTranslate(1, 1); | |
| 456 t.ConcatScale(size_.width()/2.0f, size_.height()/2.0f); | |
| 457 t.ConcatTranslate(0, -size_.height()); | |
| 458 t.ConcatScale(1, -1); | |
| 459 | |
| 460 t.ConcatTransform(params.transform); // Add view transform. | |
| 461 | |
| 462 t.ConcatTranslate(0, -params.compositor_size.height()); | |
| 463 t.ConcatScale(1, -1); | |
| 464 t.ConcatTranslate(-params.compositor_size.width() / 2.0f, | |
| 465 -params.compositor_size.height() / 2.0f); | |
| 466 t.ConcatScale(2.0f / params.compositor_size.width(), | |
| 467 2.0f / params.compositor_size.height()); | |
| 468 | |
| 469 GLfloat m[16]; | |
| 470 t.matrix().asColMajorf(m); | |
| 471 | |
| 472 SkPoint texture_points[4]; | |
| 473 texture_points[0] = SkPoint::Make(clip_bounds.x(), | |
| 474 clip_bounds.y() + clip_bounds.height()); | |
| 475 texture_points[1] = SkPoint::Make(clip_bounds.x() + clip_bounds.width(), | |
| 476 clip_bounds.y() + clip_bounds.height()); | |
| 477 texture_points[2] = SkPoint::Make(clip_bounds.x() + clip_bounds.width(), | |
| 478 clip_bounds.y()); | |
| 479 texture_points[3] = SkPoint::Make(clip_bounds.x(), clip_bounds.y()); | |
| 480 | |
| 481 ui::Transform texture_rect_transform; | |
| 482 texture_rect_transform.ConcatScale(1.0f / size_.width(), | |
| 483 1.0f / size_.height()); | |
| 484 if (params.vertically_flipped) { | |
| 485 ui::Transform vertical_flip; | |
| 486 vertical_flip.SetScaleY(-1.0); | |
| 487 vertical_flip.SetTranslateY(1.0); | |
| 488 texture_rect_transform.ConcatTransform(vertical_flip); | |
| 489 } | |
| 490 SkMatrix texture_transform_matrix = texture_rect_transform.matrix(); | |
| 491 texture_transform_matrix.mapPoints(texture_points, 4); | |
| 492 | |
| 493 SkRect clip_rect = SkRect::MakeXYWH( | |
| 494 clip_bounds.x(), | |
| 495 clip_bounds.y(), | |
| 496 clip_bounds.width(), | |
| 497 clip_bounds.height()); | |
| 498 | |
| 499 ui::Transform clip_rect_transform; | |
| 500 clip_rect_transform.ConcatScale(2.0f / size_.width(), | |
| 501 2.0f / size_.height()); | |
| 502 clip_rect_transform.ConcatScale(1, -1); | |
| 503 clip_rect_transform.ConcatTranslate(-1.0f, 1.0f); | |
| 504 SkMatrix clip_transform_matrix = clip_rect_transform.matrix(); | |
| 505 clip_transform_matrix.mapRect(&clip_rect); | |
| 506 | |
| 507 GLfloat clip_vertices[] = { clip_rect.left(), clip_rect.top(), +0., | |
| 508 clip_rect.right(), clip_rect.top(), +0., | |
| 509 clip_rect.right(), clip_rect.bottom(), +0., | |
| 510 clip_rect.left(), clip_rect.bottom(), +0.}; | |
| 511 | |
| 512 GLfloat texture_vertices[] = { texture_points[0].x(), texture_points[0].y(), | |
| 513 texture_points[1].x(), texture_points[1].y(), | |
| 514 texture_points[2].x(), texture_points[2].y(), | |
| 515 texture_points[3].x(), texture_points[3].y()}; | |
| 516 | |
| 517 glVertexAttribPointer(program.a_pos_loc(), 3, GL_FLOAT, | |
| 518 GL_FALSE, 3 * sizeof(GLfloat), clip_vertices); | |
| 519 glVertexAttribPointer(program.a_tex_loc(), 2, GL_FLOAT, | |
| 520 GL_FALSE, 2 * sizeof(GLfloat), texture_vertices); | |
| 521 glEnableVertexAttribArray(program.a_pos_loc()); | |
| 522 glEnableVertexAttribArray(program.a_tex_loc()); | |
| 523 | |
| 524 glUniformMatrix4fv(program.u_mat_loc(), 1, GL_FALSE, m); | |
| 525 | |
| 526 // negative means multiply, positive means clobber. | |
| 527 float alpha = params.has_valid_alpha_channel | |
| 528 ? -params.opacity | |
| 529 : params.opacity; | |
| 530 | |
| 531 glUniform1fv(program.u_alpha_loc(), 1, &alpha); | |
| 532 | |
| 533 glDrawArrays(GL_TRIANGLE_FAN, 0, 4); | |
| 534 } | |
| 535 | |
| 536 CompositorGL::CompositorGL(CompositorDelegate* delegate, | |
| 537 gfx::AcceleratedWidget widget, | |
| 538 const gfx::Size& size) | |
| 539 : Compositor(delegate, size), | |
| 540 started_(false) { | |
| 541 gl_surface_ = gfx::GLSurface::CreateViewGLSurface(false, widget); | |
| 542 gl_context_ = SharedResourcesGL::GetInstance()-> | |
| 543 CreateContext(gl_surface_.get()); | |
| 544 gl_context_->MakeCurrent(gl_surface_.get()); | |
| 545 | |
| 546 CommandLine* command_line = CommandLine::ForCurrentProcess(); | |
| 547 | |
| 548 if (!command_line->HasSwitch(switches::kDisableUIVsync)) | |
| 549 gl_context_->SetSwapInterval(1); | |
| 550 | |
| 551 glColorMask(true, true, true, true); | |
| 552 | |
| 553 const bool debug_overdraw = command_line->HasSwitch( | |
| 554 switches::kEnableCompositorOverdrawDebugging); | |
| 555 | |
| 556 if (debug_overdraw) | |
| 557 glBlendFunc(GL_ONE, GL_ONE); | |
| 558 else | |
| 559 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); | |
| 560 } | |
| 561 | |
| 562 CompositorGL::~CompositorGL() { | |
| 563 gl_context_ = NULL; | |
| 564 } | |
| 565 | |
| 566 bool CompositorGL::ReadPixels(SkBitmap* bitmap, const gfx::Rect& bounds) { | |
| 567 MakeCurrent(); | |
| 568 | |
| 569 if (bounds.right() > size().width() || bounds.bottom() > size().height()) | |
| 570 return false; | |
| 571 | |
| 572 bitmap->setConfig(SkBitmap::kARGB_8888_Config, | |
| 573 bounds.width(), | |
| 574 bounds.height()); | |
| 575 bitmap->allocPixels(); | |
| 576 SkAutoLockPixels lock(*bitmap); | |
| 577 unsigned char* pixels = static_cast<unsigned char*>(bitmap->getPixels()); | |
| 578 | |
| 579 // Check that it's a tight pixel packing | |
| 580 DCHECK_EQ(bitmap->rowBytes(), | |
| 581 SkBitmap::ComputeRowBytes(bitmap->config(), bitmap->width())); | |
| 582 | |
| 583 GLint current_alignment = 0; | |
| 584 glGetIntegerv(GL_PACK_ALIGNMENT, ¤t_alignment); | |
| 585 glPixelStorei(GL_PACK_ALIGNMENT, 4); | |
| 586 | |
| 587 // Flip vertically to convert to OpenGL coordinates. | |
| 588 glReadPixels(bounds.x(), | |
| 589 size().height() - bounds.y() - bounds.height(), | |
| 590 bounds.width(), | |
| 591 bounds.height(), | |
| 592 GL_RGBA, | |
| 593 GL_UNSIGNED_BYTE, | |
| 594 pixels); | |
| 595 glPixelStorei(GL_PACK_ALIGNMENT, current_alignment); | |
| 596 | |
| 597 SwizzleRGBAToBGRAAndFlip(pixels, bounds.size()); | |
| 598 return true; | |
| 599 } | |
| 600 | |
| 601 void CompositorGL::MakeCurrent() { | |
| 602 gl_context_->MakeCurrent(gl_surface_.get()); | |
| 603 } | |
| 604 | |
| 605 void CompositorGL::OnWidgetSizeChanged() { | |
| 606 } | |
| 607 | |
| 608 Texture* CompositorGL::CreateTexture() { | |
| 609 Texture* texture = new TextureGL(); | |
| 610 return texture; | |
| 611 } | |
| 612 | |
| 613 void CompositorGL::OnNotifyStart(bool clear) { | |
| 614 TRACE_EVENT0("ui", "CompositorGL::OnNotifyStart"); | |
| 615 started_ = true; | |
| 616 gl_context_->MakeCurrent(gl_surface_.get()); | |
| 617 glViewport(0, 0, size().width(), size().height()); | |
| 618 glColorMask(true, true, true, true); | |
| 619 | |
| 620 if (clear) { | |
| 621 glClearColor(0, 0, 0, 0); | |
| 622 glClear(GL_COLOR_BUFFER_BIT); | |
| 623 } | |
| 624 #if !defined(NDEBUG) | |
| 625 else { | |
| 626 // In debug mode, when we're not forcing a clear, clear to 'psychedelic' | |
| 627 // purple to make it easy to spot un-rendered regions. | |
| 628 glClearColor(223.0 / 255, 0, 1, 1); | |
| 629 glClear(GL_COLOR_BUFFER_BIT); | |
| 630 } | |
| 631 #endif | |
| 632 } | |
| 633 | |
| 634 void CompositorGL::OnNotifyEnd() { | |
| 635 TRACE_EVENT0("ui", "CompositorGL::OnNotifyEnd"); | |
| 636 DCHECK(started_); | |
| 637 gl_surface_->SwapBuffers(); | |
| 638 started_ = false; | |
| 639 } | |
| 640 | |
| 641 void CompositorGL::Blur(const gfx::Rect& bounds) { | |
| 642 NOTIMPLEMENTED(); | |
| 643 } | |
| 644 | |
| 645 // static | |
| 646 Compositor* Compositor::Create(CompositorDelegate* owner, | |
| 647 gfx::AcceleratedWidget widget, | |
| 648 const gfx::Size& size) { | |
| 649 if (SharedResourcesGL::GetInstance() == NULL) | |
| 650 return NULL; | |
| 651 else | |
| 652 return new CompositorGL(owner, widget, size); | |
| 653 } | |
| 654 | |
| 655 } // namespace ui | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 9288053:
Remove old (pre-webkit) compositor (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src