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.

Header

Mercurial (27a812186ff4)

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
/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40; -*- */
/* 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 "SharedSurfaceEGL.h"
#include "GLContextEGL.h"
#include "GLBlitHelper.h"
#include "ScopedGLHelpers.h"
#include "SharedSurfaceGL.h"
#include "SurfaceFactory.h"
#include "GLLibraryEGL.h"
#include "TextureGarbageBin.h"
#include "GLReadTexImageHelper.h"

using namespace mozilla::gfx;

namespace mozilla {
namespace gl {

SharedSurface_EGLImage*
SharedSurface_EGLImage::Create(GLContext* prodGL,
                               const GLFormats& formats,
                               const gfx::IntSize& size,
                               bool hasAlpha,
                               EGLContext context)
{
    GLLibraryEGL* egl = &sEGLLibrary;
    MOZ_ASSERT(egl);
    MOZ_ASSERT(context);

    if (!HasExtensions(egl, prodGL)) {
        return nullptr;
    }

    MOZ_ALWAYS_TRUE(prodGL->MakeCurrent());
    GLuint prodTex = CreateTextureForOffscreen(prodGL, formats, size);
    if (!prodTex) {
        return nullptr;
    }

    EGLClientBuffer buffer = reinterpret_cast<EGLClientBuffer>(prodTex);
    EGLImage image = egl->fCreateImage(egl->Display(), context,
                                       LOCAL_EGL_GL_TEXTURE_2D, buffer,
                                       nullptr);
    if (!image) {
        prodGL->fDeleteTextures(1, &prodTex);
        return nullptr;
    }

    return new SharedSurface_EGLImage(prodGL, egl,
                                      size, hasAlpha,
                                      formats, prodTex, image);
}


bool
SharedSurface_EGLImage::HasExtensions(GLLibraryEGL* egl, GLContext* gl)
{
    return egl->HasKHRImageBase() &&
           egl->IsExtensionSupported(GLLibraryEGL::KHR_gl_texture_2D_image) &&
           gl->IsExtensionSupported(GLContext::OES_EGL_image_external);
}

SharedSurface_EGLImage::SharedSurface_EGLImage(GLContext* gl,
                                               GLLibraryEGL* egl,
                                               const gfx::IntSize& size,
                                               bool hasAlpha,
                                               const GLFormats& formats,
                                               GLuint prodTex,
                                               EGLImage image)
    : SharedSurface_GL(SharedSurfaceType::EGLImageShare,
                        AttachmentType::GLTexture,
                        gl,
                        size,
                        hasAlpha)
    , mMutex("SharedSurface_EGLImage mutex")
    , mEGL(egl)
    , mFormats(formats)
    , mProdTex(prodTex)
    , mImage(image)
    , mCurConsGL(nullptr)
    , mConsTex(0)
    , mSync(0)
{}

SharedSurface_EGLImage::~SharedSurface_EGLImage()
{
    mEGL->fDestroyImage(Display(), mImage);
    mImage = 0;

    mGL->MakeCurrent();
    mGL->fDeleteTextures(1, &mProdTex);
    mProdTex = 0;

    if (mConsTex) {
        MOZ_ASSERT(mGarbageBin);
        mGarbageBin->Trash(mConsTex);
        mConsTex = 0;
    }

    if (mSync) {
        // We can't call this unless we have the ext, but we will always have
        // the ext if we have something to destroy.
        mEGL->fDestroySync(Display(), mSync);
        mSync = 0;
    }
}

void
SharedSurface_EGLImage::Fence()
{
    MutexAutoLock lock(mMutex);
    mGL->MakeCurrent();

    if (mEGL->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync) &&
        mGL->IsExtensionSupported(GLContext::OES_EGL_sync))
    {
        if (mSync) {
            MOZ_ALWAYS_TRUE( mEGL->fDestroySync(Display(), mSync) );
            mSync = 0;
        }

        mSync = mEGL->fCreateSync(Display(),
                                  LOCAL_EGL_SYNC_FENCE,
                                  nullptr);
        if (mSync) {
            mGL->fFlush();
            return;
        }
    }

    MOZ_ASSERT(!mSync);
    mGL->fFinish();
}

bool
SharedSurface_EGLImage::WaitSync()
{
    MutexAutoLock lock(mMutex);
    if (!mSync) {
        // We must not be needed.
        return true;
    }
    MOZ_ASSERT(mEGL->IsExtensionSupported(GLLibraryEGL::KHR_fence_sync));

    // Wait FOREVER, primarily because some NVIDIA (at least Tegra) drivers
    // have ClientWaitSync returning immediately if the timeout delay is anything
    // else than FOREVER.
    //
    // FIXME: should we try to use a finite timeout delay where possible?
    EGLint status = mEGL->fClientWaitSync(Display(),
                                          mSync,
                                          0,
                                          LOCAL_EGL_FOREVER);

    if (status != LOCAL_EGL_CONDITION_SATISFIED) {
        return false;
    }

    MOZ_ALWAYS_TRUE( mEGL->fDestroySync(Display(), mSync) );
    mSync = 0;

    return true;
}


EGLDisplay
SharedSurface_EGLImage::Display() const
{
    return mEGL->Display();
}

void
SharedSurface_EGLImage::AcquireConsumerTexture(GLContext* consGL, GLuint* out_texture, GLuint* out_target)
{
    MutexAutoLock lock(mMutex);
    MOZ_ASSERT(!mCurConsGL || consGL == mCurConsGL);

    if (!mConsTex) {
        consGL->fGenTextures(1, &mConsTex);
        MOZ_ASSERT(mConsTex);

        ScopedBindTexture autoTex(consGL, mConsTex, LOCAL_GL_TEXTURE_EXTERNAL);
        consGL->fEGLImageTargetTexture2D(LOCAL_GL_TEXTURE_EXTERNAL, mImage);

        mCurConsGL = consGL;
        mGarbageBin = consGL->TexGarbageBin();
    }

    MOZ_ASSERT(consGL == mCurConsGL);
    *out_texture = mConsTex;
    *out_target = LOCAL_GL_TEXTURE_EXTERNAL;
}


SurfaceFactory_EGLImage*
SurfaceFactory_EGLImage::Create(GLContext* prodGL,
                                        const SurfaceCaps& caps)
{
    EGLContext context = GLContextEGL::Cast(prodGL)->GetEGLContext();

    GLLibraryEGL* egl = &sEGLLibrary;
    if (!SharedSurface_EGLImage::HasExtensions(egl, prodGL)) {
        return nullptr;
    }

    return new SurfaceFactory_EGLImage(prodGL, context, caps);
}

} /* namespace gfx */
} /* namespace mozilla */