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 (e67641c2e4cc)

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
/* -*- Mode: c++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 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 "SharedSurfaceGL.h"

#include "GLBlitHelper.h"
#include "GLContext.h"
#include "GLReadTexImageHelper.h"
#include "mozilla/gfx/2D.h"
#include "ScopedGLHelpers.h"

namespace mozilla {
namespace gl {

using gfx::IntSize;
using gfx::SurfaceFormat;

/*static*/ UniquePtr<SharedSurface_Basic> SharedSurface_Basic::Create(
    GLContext* gl, const GLFormats& formats, const IntSize& size,
    bool hasAlpha) {
  UniquePtr<SharedSurface_Basic> ret;
  gl->MakeCurrent();

  GLContext::LocalErrorScope localError(*gl);
  GLuint tex = CreateTextureForOffscreen(gl, formats, size);

  GLenum err = localError.GetError();
  MOZ_ASSERT_IF(err != LOCAL_GL_NO_ERROR, err == LOCAL_GL_OUT_OF_MEMORY);
  if (err) {
    gl->fDeleteTextures(1, &tex);
    return Move(ret);
  }

  bool ownsTex = true;
  ret.reset(new SharedSurface_Basic(gl, size, hasAlpha, tex, ownsTex));
  return Move(ret);
}

/*static*/ UniquePtr<SharedSurface_Basic> SharedSurface_Basic::Wrap(
    GLContext* gl, const IntSize& size, bool hasAlpha, GLuint tex) {
  bool ownsTex = false;
  UniquePtr<SharedSurface_Basic> ret(
      new SharedSurface_Basic(gl, size, hasAlpha, tex, ownsTex));
  return Move(ret);
}

SharedSurface_Basic::SharedSurface_Basic(GLContext* gl, const IntSize& size,
                                         bool hasAlpha, GLuint tex,
                                         bool ownsTex)
    : SharedSurface(SharedSurfaceType::Basic, AttachmentType::GLTexture, gl,
                    size, hasAlpha, true),
      mTex(tex),
      mOwnsTex(ownsTex),
      mFB(0) {
  mGL->MakeCurrent();
  mGL->fGenFramebuffers(1, &mFB);

  ScopedBindFramebuffer autoFB(mGL, mFB);
  mGL->fFramebufferTexture2D(LOCAL_GL_FRAMEBUFFER, LOCAL_GL_COLOR_ATTACHMENT0,
                             LOCAL_GL_TEXTURE_2D, mTex, 0);

  DebugOnly<GLenum> status = mGL->fCheckFramebufferStatus(LOCAL_GL_FRAMEBUFFER);
  MOZ_ASSERT(status == LOCAL_GL_FRAMEBUFFER_COMPLETE);
}

SharedSurface_Basic::~SharedSurface_Basic() {
  if (!mGL || !mGL->MakeCurrent()) return;

  if (mFB) mGL->fDeleteFramebuffers(1, &mFB);

  if (mOwnsTex) mGL->fDeleteTextures(1, &mTex);
}

////////////////////////////////////////////////////////////////////////

SurfaceFactory_Basic::SurfaceFactory_Basic(GLContext* gl,
                                           const SurfaceCaps& caps,
                                           const layers::TextureFlags& flags)
    : SurfaceFactory(SharedSurfaceType::Basic, gl, caps, nullptr, flags) {}

////////////////////////////////////////////////////////////////////////
// SharedSurface_GLTexture

/*static*/ UniquePtr<SharedSurface_GLTexture> SharedSurface_GLTexture::Create(
    GLContext* prodGL, const GLFormats& formats, const IntSize& size,
    bool hasAlpha) {
  MOZ_ASSERT(prodGL);

  prodGL->MakeCurrent();

  UniquePtr<SharedSurface_GLTexture> ret;
  GLContext::LocalErrorScope localError(*prodGL);

  GLuint tex = CreateTextureForOffscreen(prodGL, formats, size);

  GLenum err = localError.GetError();
  MOZ_ASSERT_IF(err, err == LOCAL_GL_OUT_OF_MEMORY);
  if (err) {
    prodGL->fDeleteTextures(1, &tex);
    return Move(ret);
  }

  ret.reset(new SharedSurface_GLTexture(prodGL, size, hasAlpha, tex));
  return Move(ret);
}

SharedSurface_GLTexture::~SharedSurface_GLTexture() {
  if (!mGL->MakeCurrent()) return;

  if (mTex) {
    mGL->fDeleteTextures(1, &mTex);
  }

  if (mSync) {
    mGL->fDeleteSync(mSync);
  }
}

void SharedSurface_GLTexture::ProducerReleaseImpl() {
  mGL->MakeCurrent();

  if (mGL->IsSupported(GLFeature::sync)) {
    if (mSync) {
      mGL->fDeleteSync(mSync);
      mSync = 0;
    }

    mSync = mGL->fFenceSync(LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
    if (mSync) {
      mGL->fFlush();
      return;
    }
  }
  MOZ_ASSERT(!mSync);

  mGL->fFinish();
}

bool SharedSurface_GLTexture::ToSurfaceDescriptor(
    layers::SurfaceDescriptor* const out_descriptor) {
  *out_descriptor = layers::SurfaceDescriptorSharedGLTexture(
      ProdTexture(), ProdTextureTarget(), (uintptr_t)mSync, mSize, mHasAlpha);

  // Transfer ownership of the fence to the host
  mSync = nullptr;
  return true;
}

}  // namespace gl

} /* namespace mozilla */