The Tor Browser: gfx/gl/TextureImageEGL.cpp@97036ab72558 (annotated)

gfx/gl/TextureImageEGL.cpp@97036ab72558 (annotated)

gfx/gl/TextureImageEGL.cpp

Tue, 06 Jan 2015 21:39:09 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Tue, 06 Jan 2015 21:39:09 +0100
branch: TOR_BUG_9701
changeset 8: 97036ab72558
permissions: -rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

 /* -*- 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 "TextureImageEGL.h"
 #include "GLLibraryEGL.h"
 #include "GLContext.h"
 #include "GLUploadHelpers.h"
 #include "gfxPlatform.h"
 #include "gfx2DGlue.h"
 #include "mozilla/gfx/Types.h"
 namespace mozilla {
 namespace gl {
 static GLenum
 GLFormatForImage(gfx::SurfaceFormat aFormat)
 {
     switch (aFormat) {
     case gfx::SurfaceFormat::B8G8R8A8:
     case gfx::SurfaceFormat::B8G8R8X8:
         return LOCAL_GL_RGBA;
     case gfx::SurfaceFormat::R5G6B5:
         return LOCAL_GL_RGB;
     case gfx::SurfaceFormat::A8:
         return LOCAL_GL_LUMINANCE;
     default:
         NS_WARNING("Unknown GL format for Surface format");
     }
     return 0;
 }
 static GLenum
 GLTypeForImage(gfx::SurfaceFormat aFormat)
 {
     switch (aFormat) {
     case gfx::SurfaceFormat::B8G8R8A8:
     case gfx::SurfaceFormat::B8G8R8X8:
     case gfx::SurfaceFormat::A8:
         return LOCAL_GL_UNSIGNED_BYTE;
     case gfx::SurfaceFormat::R5G6B5:
         return LOCAL_GL_UNSIGNED_SHORT_5_6_5;
     default:
         NS_WARNING("Unknown GL format for Surface format");
     }
     return 0;
 }
 TextureImageEGL::TextureImageEGL(GLuint aTexture,
                                  const nsIntSize& aSize,
                                  GLenum aWrapMode,
                                  ContentType aContentType,
                                  GLContext* aContext,
                                  Flags aFlags,
                                  TextureState aTextureState,
                                  TextureImage::ImageFormat aImageFormat)
     : TextureImage(aSize, aWrapMode, aContentType, aFlags)
     , mGLContext(aContext)
     , mUpdateFormat(gfx::ImageFormatToSurfaceFormat(aImageFormat))
     , mEGLImage(nullptr)
     , mTexture(aTexture)
     , mSurface(nullptr)
     , mConfig(nullptr)
     , mTextureState(aTextureState)
     , mBound(false)
 {
     if (mUpdateFormat == gfx::SurfaceFormat::UNKNOWN) {
         mUpdateFormat = gfx::ImageFormatToSurfaceFormat(
                 gfxPlatform::GetPlatform()->OptimalFormatForContent(GetContentType()));
     }
     if (mUpdateFormat == gfx::SurfaceFormat::R5G6B5) {
         mTextureFormat = gfx::SurfaceFormat::R8G8B8X8;
     } else if (mUpdateFormat == gfx::SurfaceFormat::B8G8R8X8) {
         mTextureFormat = gfx::SurfaceFormat::B8G8R8X8;
     } else {
         mTextureFormat = gfx::SurfaceFormat::B8G8R8A8;
     }
 }
 TextureImageEGL::~TextureImageEGL()
 {
     if (mGLContext->IsDestroyed() || !mGLContext->IsOwningThreadCurrent()) {
         return;
     }
     // If we have a context, then we need to delete the texture;
     // if we don't have a context (either real or shared),
     // then they went away when the contex was deleted, because it
     // was the only one that had access to it.
     mGLContext->MakeCurrent();
     mGLContext->fDeleteTextures(1, &mTexture);
     ReleaseTexImage();
     DestroyEGLSurface();
 }
 void
 TextureImageEGL::GetUpdateRegion(nsIntRegion& aForRegion)
 {
     if (mTextureState != Valid) {
         // if the texture hasn't been initialized yet, force the
         // client to paint everything
         aForRegion = nsIntRect(nsIntPoint(0, 0), gfx::ThebesIntSize(mSize));
     }
     // We can only draw a rectangle, not subregions due to
     // the way that our texture upload functions work.  If
     // needed, we /could/ do multiple texture uploads if we have
     // non-overlapping rects, but that's a tradeoff.
     aForRegion = nsIntRegion(aForRegion.GetBounds());
 }
 gfx::DrawTarget*
 TextureImageEGL::BeginUpdate(nsIntRegion& aRegion)
 {
     NS_ASSERTION(!mUpdateDrawTarget, "BeginUpdate() without EndUpdate()?");
     // determine the region the client will need to repaint
     GetUpdateRegion(aRegion);
     mUpdateRect = aRegion.GetBounds();
     //printf_stderr("BeginUpdate with updateRect [%d %d %d %d]\n", mUpdateRect.x, mUpdateRect.y, mUpdateRect.width, mUpdateRect.height);
     if (!nsIntRect(nsIntPoint(0, 0), gfx::ThebesIntSize(mSize)).Contains(mUpdateRect)) {
         NS_ERROR("update outside of image");
         return nullptr;
     }
     //printf_stderr("creating image surface %dx%d format %d\n", mUpdateRect.width, mUpdateRect.height, mUpdateFormat);
     mUpdateDrawTarget = gfx::Factory::CreateDrawTarget(gfx::BackendType::CAIRO,
                                                        gfx::IntSize(mUpdateRect.width, mUpdateRect.height),
                                                        mUpdateFormat);
     return mUpdateDrawTarget;
 }
 void
 TextureImageEGL::EndUpdate()
 {
     NS_ASSERTION(!!mUpdateDrawTarget, "EndUpdate() without BeginUpdate()?");
     //printf_stderr("EndUpdate: slow path");
     // This is the slower path -- we didn't have any way to set up
     // a fast mapping between our cairo target surface and the GL
     // texture, so we have to upload data.
     RefPtr<gfx::SourceSurface> updateSurface = nullptr;
     RefPtr<gfx::DataSourceSurface> uploadImage = nullptr;
     gfx::IntSize updateSize(mUpdateRect.width, mUpdateRect.height);
     NS_ASSERTION(mUpdateDrawTarget->GetSize() == updateSize,
                   "Upload image is the wrong size!");
     updateSurface = mUpdateDrawTarget->Snapshot();
     uploadImage = updateSurface->GetDataSurface();
     if (!uploadImage) {
         return;
     }
     mGLContext->MakeCurrent();
     mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
     if (mTextureState != Valid) {
         NS_ASSERTION(mUpdateRect.x == 0 && mUpdateRect.y == 0 &&
                       mUpdateRect.Size() == gfx::ThebesIntSize(mSize),
                       "Bad initial update on non-created texture!");
         mGLContext->fTexImage2D(LOCAL_GL_TEXTURE_2D,
 ,
                                 GLFormatForImage(mUpdateFormat),
                                 mUpdateRect.width,
                                 mUpdateRect.height,
 ,
                                 GLFormatForImage(uploadImage->GetFormat()),
                                 GLTypeForImage(uploadImage->GetFormat()),
                                 uploadImage->GetData());
     } else {
         mGLContext->fTexSubImage2D(LOCAL_GL_TEXTURE_2D,
 ,
                                     mUpdateRect.x,
                                     mUpdateRect.y,
                                     mUpdateRect.width,
                                     mUpdateRect.height,
                                     GLFormatForImage(uploadImage->GetFormat()),
                                     GLTypeForImage(uploadImage->GetFormat()),
                                     uploadImage->GetData());
     }
     mUpdateDrawTarget = nullptr;
     mTextureState = Valid;
     return;         // mTexture is bound
 }
 bool
 TextureImageEGL::DirectUpdate(gfx::DataSourceSurface* aSurf, const nsIntRegion& aRegion, const gfx::IntPoint& aFrom /* = gfx::IntPoint(0,0) */)
 {
     nsIntRect bounds = aRegion.GetBounds();
     nsIntRegion region;
     if (mTextureState != Valid) {
         bounds = nsIntRect(0, 0, mSize.width, mSize.height);
         region = nsIntRegion(bounds);
     } else {
         region = aRegion;
     }
     mTextureFormat =
       UploadSurfaceToTexture(mGLContext,
                              aSurf,
                              region,
                              mTexture,
                              mTextureState == Created,
                              bounds.TopLeft() + nsIntPoint(aFrom.x, aFrom.y),
                              false);
     mTextureState = Valid;
     return true;
 }
 void
 TextureImageEGL::BindTexture(GLenum aTextureUnit)
 {
     // Ensure the texture is allocated before it is used.
     if (mTextureState == Created) {
         Resize(mSize);
     }
     mGLContext->fActiveTexture(aTextureUnit);
     mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
     mGLContext->fActiveTexture(LOCAL_GL_TEXTURE0);
 }
 void
 TextureImageEGL::Resize(const gfx::IntSize& aSize)
 {
     NS_ASSERTION(!mUpdateDrawTarget, "Resize() while in update?");
     if (mSize == aSize && mTextureState != Created)
         return;
     mGLContext->fBindTexture(LOCAL_GL_TEXTURE_2D, mTexture);
     mGLContext->fTexImage2D(LOCAL_GL_TEXTURE_2D,
 ,
                             GLFormatForImage(mUpdateFormat),
                             aSize.width,
                             aSize.height,
 ,
                             GLFormatForImage(mUpdateFormat),
                             GLTypeForImage(mUpdateFormat),
                             nullptr);
     mTextureState = Allocated;
     mSize = aSize;
 }
 bool
 TextureImageEGL::BindTexImage()
 {
     if (mBound && !ReleaseTexImage())
         return false;
     EGLBoolean success =
         sEGLLibrary.fBindTexImage(EGL_DISPLAY(),
                                   (EGLSurface)mSurface,
                                   LOCAL_EGL_BACK_BUFFER);
     if (success == LOCAL_EGL_FALSE)
         return false;
     mBound = true;
     return true;
 }
 bool
 TextureImageEGL::ReleaseTexImage()
 {
     if (!mBound)
         return true;
     EGLBoolean success =
         sEGLLibrary.fReleaseTexImage(EGL_DISPLAY(),
                                       (EGLSurface)mSurface,
                                       LOCAL_EGL_BACK_BUFFER);
     if (success == LOCAL_EGL_FALSE)
         return false;
     mBound = false;
     return true;
 }
 void
 TextureImageEGL::DestroyEGLSurface(void)
 {
     if (!mSurface)
         return;
     sEGLLibrary.fDestroySurface(EGL_DISPLAY(), mSurface);
     mSurface = nullptr;
 }
 already_AddRefed<TextureImage>
 CreateTextureImageEGL(GLContext *gl,
                       const gfx::IntSize& aSize,
                       TextureImage::ContentType aContentType,
                       GLenum aWrapMode,
                       TextureImage::Flags aFlags,
                       TextureImage::ImageFormat aImageFormat)
 {
     nsRefPtr<TextureImage> t = new gl::TiledTextureImage(gl, aSize, aContentType, aFlags, aImageFormat);
     return t.forget();
 }
 already_AddRefed<TextureImage>
 TileGenFuncEGL(GLContext *gl,
                const nsIntSize& aSize,
                TextureImage::ContentType aContentType,
                TextureImage::Flags aFlags,
                TextureImage::ImageFormat aImageFormat)
 {
   gl->MakeCurrent();
   GLuint texture;
   gl->fGenTextures(1, &texture);
   nsRefPtr<TextureImageEGL> teximage =
       new TextureImageEGL(texture, aSize, LOCAL_GL_CLAMP_TO_EDGE, aContentType,
                           gl, aFlags, TextureImage::Created, aImageFormat);
   teximage->BindTexture(LOCAL_GL_TEXTURE0);
   GLint texfilter = aFlags & TextureImage::UseNearestFilter ? LOCAL_GL_NEAREST : LOCAL_GL_LINEAR;
   gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MIN_FILTER, texfilter);
   gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_MAG_FILTER, texfilter);
   gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
   gl->fTexParameteri(LOCAL_GL_TEXTURE_2D, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
   return teximage.forget();
 }
 }
 }

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gfx/gl/TextureImageEGL.cpp@97036ab72558 (annotated)

gfx/gl/TextureImageEGL.cpp