DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (31ec81b5d7bb)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "GLContextProvider.h"
#include "GLContext.h"
#include "nsDebug.h"
#include "nsIWidget.h"
#include "OpenGL/OpenGL.h"
#include <OpenGL/gl.h>
#include <AppKit/NSOpenGL.h>
#include "gfxASurface.h"
#include "gfxImageSurface.h"
#include "gfxQuartzSurface.h"
#include "gfxPlatform.h"
#include "gfxFailure.h"
#include "prenv.h"
#include "mozilla/Preferences.h"
#include "GeckoProfiler.h"
#include "mozilla/gfx/MacIOSurface.h"

using namespace mozilla::gfx;

namespace mozilla {
namespace gl {

static bool gUseDoubleBufferedWindows = true;

class CGLLibrary
{
public:
    CGLLibrary()
      : mInitialized(false),
        mOGLLibrary(nullptr),
        mPixelFormat(nullptr)
    { }

    bool EnsureInitialized()
    {
        if (mInitialized) {
            return true;
        }
        if (!mOGLLibrary) {
            mOGLLibrary = PR_LoadLibrary("/System/Library/Frameworks/OpenGL.framework/OpenGL");
            if (!mOGLLibrary) {
                NS_WARNING("Couldn't load OpenGL Framework.");
                return false;
            }
        }

        const char* db = PR_GetEnv("MOZ_CGL_DB");
        gUseDoubleBufferedWindows = (!db || *db != '0');

        mInitialized = true;
        return true;
    }

    NSOpenGLPixelFormat *PixelFormat()
    {
        if (mPixelFormat == nullptr) {
            NSOpenGLPixelFormatAttribute attribs[] = {
                NSOpenGLPFAAccelerated,
                NSOpenGLPFAAllowOfflineRenderers,
                NSOpenGLPFADoubleBuffer,
                0
            };

            if (!gUseDoubleBufferedWindows) {
              attribs[2] = 0;
            }

            mPixelFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes:attribs];
        }

        return mPixelFormat;
    }
private:
    bool mInitialized;
    PRLibrary *mOGLLibrary;
    NSOpenGLPixelFormat *mPixelFormat;
}; 

CGLLibrary sCGLLibrary;

class GLContextCGL : public GLContext
{
    friend class GLContextProviderCGL;

public:
    GLContextCGL(const SurfaceCaps& caps,
                 GLContext *shareContext,
                 NSOpenGLContext *context,
                 bool isOffscreen = false)
        : GLContext(caps, shareContext, isOffscreen),
          mContext(context),
          mTempTextureName(0)
    {
        SetProfileVersion(ContextProfile::OpenGLCompatibility, 210);
    }

    ~GLContextCGL()
    {
        MarkDestroyed();

        if (mContext)
            [mContext release];
    }

    GLContextType GetContextType() {
        return ContextTypeCGL;
    }

    bool Init()
    {
        MakeCurrent();
        if (!InitWithPrefix("gl", true))
            return false;

        return true;
    }

    void *GetNativeData(NativeDataType aType)
    { 
        switch (aType) {
        case NativeGLContext:
            return mContext;

        default:
            return nullptr;
        }
    }

    bool MakeCurrentImpl(bool aForce = false)
    {
        if (!aForce && [NSOpenGLContext currentContext] == mContext) {
            return true;
        }

        if (mContext) {
            [mContext makeCurrentContext];
            // Use non-blocking swap in "ASAP mode".
            // ASAP mode means that rendering is iterated as fast as possible.
            // ASAP mode is entered when layout.frame_rate=0 (requires restart).
            // If swapInt is 1, then glSwapBuffers will block and wait for a vblank signal.
            // When we're iterating as fast as possible, however, we want a non-blocking
            // glSwapBuffers, which will happen when swapInt==0.
            GLint swapInt = gfxPlatform::GetPrefLayoutFrameRate() == 0 ? 0 : 1;
            [mContext setValues:&swapInt forParameter:NSOpenGLCPSwapInterval];
        }
        return true;
    }

    virtual bool IsCurrent() {
        return [NSOpenGLContext currentContext] == mContext;
    }

    virtual GLenum GetPreferredARGB32Format() MOZ_OVERRIDE { return LOCAL_GL_BGRA; }

    bool SetupLookupFunction()
    {
        return false;
    }

    bool IsDoubleBuffered() 
    { 
      return gUseDoubleBufferedWindows; 
    }

    bool SupportsRobustness()
    {
        return false;
    }

    bool SwapBuffers()
    {
      PROFILER_LABEL("GLContext", "SwapBuffers");
      [mContext flushBuffer];
      return true;
    }

    bool ResizeOffscreen(const gfxIntSize& aNewSize);

    virtual already_AddRefed<TextureImage>
    CreateTextureImage(const nsIntSize& aSize,
                       TextureImage::ContentType aContentType,
                       GLenum aWrapMode,
                       TextureImage::Flags aFlags = TextureImage::NoFlags,
                       TextureImage::ImageFormat aImageFormat = gfxASurface::ImageFormatUnknown) MOZ_OVERRIDE;

    virtual already_AddRefed<TextureImage>
    TileGenFunc(const nsIntSize& aSize,
                TextureImage::ContentType aContentType,
                TextureImage::Flags aFlags = TextureImage::NoFlags,
                TextureImage::ImageFormat aImageFormat = gfxASurface::ImageFormatUnknown) MOZ_OVERRIDE;

    virtual SharedTextureHandle CreateSharedHandle(SharedTextureShareType shareType,
                                                   void* buffer,
                                                   SharedTextureBufferType bufferType)
    {
        return GLContextProviderCGL::CreateSharedHandle(shareType, buffer, bufferType);
    }

    virtual void ReleaseSharedHandle(SharedTextureShareType shareType,
                                     SharedTextureHandle sharedHandle)
    {
        if (sharedHandle) {
            reinterpret_cast<MacIOSurface*>(sharedHandle)->Release();
        }
    }

    virtual bool GetSharedHandleDetails(SharedTextureShareType shareType,
                                        SharedTextureHandle sharedHandle,
                                        SharedHandleDetails& details)
    {
        MacIOSurface* surf = reinterpret_cast<MacIOSurface*>(sharedHandle);
        details.mTarget = LOCAL_GL_TEXTURE_RECTANGLE_ARB;
        details.mTextureFormat = surf->HasAlpha() ? FORMAT_R8G8B8A8 : FORMAT_R8G8B8X8;
        return true;
    }

    virtual bool AttachSharedHandle(SharedTextureShareType shareType,
                                    SharedTextureHandle sharedHandle)
    {
        MacIOSurface* surf = reinterpret_cast<MacIOSurface*>(sharedHandle);
        surf->CGLTexImageIOSurface2D(mContext);
        return true;
    }

    NSOpenGLContext *mContext;
    GLuint mTempTextureName;

    already_AddRefed<TextureImage>
    CreateTextureImageInternal(const nsIntSize& aSize,
                               TextureImage::ContentType aContentType,
                               GLenum aWrapMode,
                               TextureImage::Flags aFlags,
                               TextureImage::ImageFormat aImageFormat);

};

bool
GLContextCGL::ResizeOffscreen(const gfxIntSize& aNewSize)
{
    return ResizeScreenBuffer(aNewSize);
}

class TextureImageCGL : public BasicTextureImage
{
    friend already_AddRefed<TextureImage>
    GLContextCGL::CreateTextureImageInternal(const nsIntSize& aSize,
                                             TextureImage::ContentType aContentType,
                                             GLenum aWrapMode,
                                             TextureImage::Flags aFlags,
                                             TextureImage::ImageFormat aImageFormat);
public:
    ~TextureImageCGL()
    {
        if (mPixelBuffer) {
            mGLContext->MakeCurrent();
            mGLContext->fDeleteBuffers(1, &mPixelBuffer);
        }
    }

protected:
    already_AddRefed<gfxASurface>
    GetSurfaceForUpdate(const gfxIntSize& aSize, ImageFormat aFmt)
    {
        gfxIntSize size(aSize.width + 1, aSize.height + 1);
        mGLContext->MakeCurrent();
        if (!mGLContext->
            IsExtensionSupported(GLContext::ARB_pixel_buffer_object)) 
        {
            return gfxPlatform::GetPlatform()->
                CreateOffscreenSurface(size,
                                       gfxASurface::ContentFromFormat(aFmt));
        }

        if (!mPixelBuffer) {
            mGLContext->fGenBuffers(1, &mPixelBuffer);
        }
        mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, mPixelBuffer);
        int32_t length = size.width * 4 * size.height;

        if (length > mPixelBufferSize) {
            mGLContext->fBufferData(LOCAL_GL_PIXEL_UNPACK_BUFFER, length,
                                    NULL, LOCAL_GL_STREAM_DRAW);
            mPixelBufferSize = length;
        }
        unsigned char* data = 
            (unsigned char*)mGLContext->
                fMapBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 
                           LOCAL_GL_WRITE_ONLY);

        mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);

        if (!data) {
            nsAutoCString failure;
            failure += "Pixel buffer binding failed: ";
            failure.AppendPrintf("%dx%d\n", size.width, size.height);
            gfx::LogFailure(failure);

            mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
            return gfxPlatform::GetPlatform()->
                CreateOffscreenSurface(size,
                                       gfxASurface::ContentFromFormat(aFmt));
        }

        nsRefPtr<gfxQuartzSurface> surf = 
            new gfxQuartzSurface(data, size, size.width * 4, aFmt);

        mBoundPixelBuffer = true;
        return surf.forget();
    }
  
    bool FinishedSurfaceUpdate()
    {
        if (mBoundPixelBuffer) {
            mGLContext->MakeCurrent();
            mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, mPixelBuffer);
            mGLContext->fUnmapBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER);
            return true;
        }
        return false;
    }

    void FinishedSurfaceUpload()
    {
        if (mBoundPixelBuffer) {
            mGLContext->MakeCurrent();
            mGLContext->fBindBuffer(LOCAL_GL_PIXEL_UNPACK_BUFFER, 0);
            mBoundPixelBuffer = false;
        }
    }

private:
    TextureImageCGL(GLuint aTexture,
                    const nsIntSize& aSize,
                    GLenum aWrapMode,
                    ContentType aContentType,
                    GLContext* aContext,
                    TextureImage::Flags aFlags = TextureImage::NoFlags,
                    TextureImage::ImageFormat aImageFormat = gfxASurface::ImageFormatUnknown)
        : BasicTextureImage(aTexture, aSize, aWrapMode, aContentType,
                            aContext, aFlags, aImageFormat)
        , mPixelBuffer(0)
        , mPixelBufferSize(0)
        , mBoundPixelBuffer(false)
    {}
    
    GLuint mPixelBuffer;
    int32_t mPixelBufferSize;
    bool mBoundPixelBuffer;
};

already_AddRefed<TextureImage>
GLContextCGL::CreateTextureImageInternal(const nsIntSize& aSize,
                                         TextureImage::ContentType aContentType,
                                         GLenum aWrapMode,
                                         TextureImage::Flags aFlags,
                                         TextureImage::ImageFormat aImageFormat)
{
    bool useNearestFilter = aFlags & TextureImage::UseNearestFilter;
    MakeCurrent();

    GLuint texture;
    fGenTextures(1, &texture);

    fActiveTexture(LOCAL_GL_TEXTURE0);
    fBindTexture(LOCAL_GL_TEXTURE_2D, texture);

    GLint texfilter = useNearestFilter ? LOCAL_GL_NEAREST : LOCAL_GL_LINEAR;
    fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, texfilter);
    fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, texfilter);
    fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_S, aWrapMode);
    fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_T, aWrapMode);

    nsRefPtr<TextureImageCGL> teximage
        (new TextureImageCGL(texture, aSize, aWrapMode, aContentType,
                             this, aFlags, aImageFormat));
    return teximage.forget();
}

already_AddRefed<TextureImage>
GLContextCGL::CreateTextureImage(const nsIntSize& aSize,
                                 TextureImage::ContentType aContentType,
                                 GLenum aWrapMode,
                                 TextureImage::Flags aFlags,
                                 TextureImage::ImageFormat aImageFormat)
{
    if (!IsOffscreenSizeAllowed(gfxIntSize(aSize.width, aSize.height)) &&
        gfxPlatform::OffMainThreadCompositingEnabled()) {
      NS_ASSERTION(aWrapMode == LOCAL_GL_CLAMP_TO_EDGE, "Can't support wrapping with tiles!");
      nsRefPtr<TextureImage> t = new gl::TiledTextureImage(this, aSize, aContentType,
                                                           aFlags, aImageFormat);
      return t.forget();
    }

    return CreateBasicTextureImage(this, aSize, aContentType, aWrapMode,
                                   aFlags, aImageFormat);
}

already_AddRefed<TextureImage>
GLContextCGL::TileGenFunc(const nsIntSize& aSize,
                          TextureImage::ContentType aContentType,
                          TextureImage::Flags aFlags,
                          TextureImage::ImageFormat aImageFormat)
{
    return CreateTextureImageInternal(aSize, aContentType,
                                      LOCAL_GL_CLAMP_TO_EDGE, aFlags,
                                      aImageFormat);
}

static GLContextCGL *
GetGlobalContextCGL()
{
    return static_cast<GLContextCGL*>(GLContextProviderCGL::GetGlobalContext());
}

already_AddRefed<GLContext>
GLContextProviderCGL::CreateForWindow(nsIWidget *aWidget)
{
    if (!sCGLLibrary.EnsureInitialized()) {
        return nullptr;
    }

    GLContextCGL *shareContext = GetGlobalContextCGL();

    NSOpenGLContext *context = [[NSOpenGLContext alloc]
                                initWithFormat:sCGLLibrary.PixelFormat()
                                shareContext:(shareContext ? shareContext->mContext : NULL)];
    if (!context) {
        return nullptr;
    }

    // make the context transparent
    GLint opaque = 0;
    [context setValues:&opaque forParameter:NSOpenGLCPSurfaceOpacity];

    SurfaceCaps caps = SurfaceCaps::ForRGBA();
    nsRefPtr<GLContextCGL> glContext = new GLContextCGL(caps,
                                                        shareContext,
                                                        context);
    if (!glContext->Init()) {
        return nullptr;
    }

    return glContext.forget();
}

static already_AddRefed<GLContextCGL>
CreateOffscreenFBOContext(bool aShare = true)
{
    if (!sCGLLibrary.EnsureInitialized()) {
        return nullptr;
    }

    GLContextCGL *shareContext = aShare ? GetGlobalContextCGL() : nullptr;
    if (aShare && !shareContext) {
        // if there is no share context, then we can't use FBOs.
        return nullptr;
    }

    NSOpenGLContext *context = [[NSOpenGLContext alloc]
                                initWithFormat:sCGLLibrary.PixelFormat()
                                shareContext:shareContext ? shareContext->mContext : NULL];
    if (!context) {
        return nullptr;
    }

    SurfaceCaps dummyCaps = SurfaceCaps::Any();
    nsRefPtr<GLContextCGL> glContext = new GLContextCGL(dummyCaps, shareContext, context, true);

    return glContext.forget();
}

already_AddRefed<GLContext>
GLContextProviderCGL::CreateOffscreen(const gfxIntSize& size,
                                      const SurfaceCaps& caps,
                                      const ContextFlags flags)
{
    nsRefPtr<GLContextCGL> glContext = CreateOffscreenFBOContext();
    if (glContext &&
        glContext->Init() &&
        glContext->InitOffscreen(size, caps))
    {
        return glContext.forget();
    }

    // everything failed
    return nullptr;
}

static nsRefPtr<GLContext> gGlobalContext;

GLContext *
GLContextProviderCGL::GetGlobalContext(const ContextFlags)
{
    if (!sCGLLibrary.EnsureInitialized()) {
        return nullptr;
    }

    if (!gGlobalContext) {
        // There are bugs in some older drivers with pbuffers less
        // than 16x16 in size; also 16x16 is POT so that we can do
        // a FBO with it on older video cards.  A FBO context for
        // sharing is preferred since it has no associated target.
        gGlobalContext = CreateOffscreenFBOContext(false);
        if (!gGlobalContext || !static_cast<GLContextCGL*>(gGlobalContext.get())->Init()) {
            NS_WARNING("Couldn't init gGlobalContext.");
            gGlobalContext = nullptr;
            return nullptr; 
        }

        gGlobalContext->SetIsGlobalSharedContext(true);
    }

    return gGlobalContext;
}

SharedTextureHandle
GLContextProviderCGL::CreateSharedHandle(SharedTextureShareType shareType,
                                         void* buffer,
                                         SharedTextureBufferType bufferType)
{
    if (shareType != SameProcess ||
        bufferType != gl::IOSurface) {
        return 0;
    }

    MacIOSurface* surf = static_cast<MacIOSurface*>(buffer);
    surf->AddRef();

    return (SharedTextureHandle)surf;
}

already_AddRefed<gfxASurface>
GLContextProviderCGL::GetSharedHandleAsSurface(SharedTextureShareType shareType,
                                               SharedTextureHandle sharedHandle)
{
  MacIOSurface* surf = reinterpret_cast<MacIOSurface*>(sharedHandle);
  surf->Lock();
  size_t bytesPerRow = surf->GetBytesPerRow();
  size_t ioWidth = surf->GetDevicePixelWidth();
  size_t ioHeight = surf->GetDevicePixelHeight();

  unsigned char* ioData = (unsigned char*)surf->GetBaseAddress();

  nsRefPtr<gfxImageSurface> imgSurface =
    new gfxImageSurface(gfxIntSize(ioWidth, ioHeight), gfxASurface::ImageFormatARGB32);

  for (size_t i = 0; i < ioHeight; i++) {
    memcpy(imgSurface->Data() + i * imgSurface->Stride(),
           ioData + i * bytesPerRow, ioWidth * 4);
  }

  surf->Unlock();

  return imgSurface.forget();
}

void
GLContextProviderCGL::Shutdown()
{
  gGlobalContext = nullptr;
}

} /* namespace gl */
} /* namespace mozilla */