1 files changed, 193 insertions, 0 deletions
diff --git a/gfx/angle/src/libANGLE/Image.cpp b/gfx/angle/src/libANGLE/Image.cpp
new file mode 100755
index 000000000..828f86238
--- /dev/null
+++ b/gfx/angle/src/libANGLE/Image.cpp
@@ -0,0 +1,193 @@
+//
+// Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Image.cpp: Implements the egl::Image class representing the EGLimage object.
+
+#include "libANGLE/Image.h"
+
+#include "common/debug.h"
+#include "common/utilities.h"
+#include "libANGLE/angletypes.h"
+#include "libANGLE/formatutils.h"
+#include "libANGLE/Texture.h"
+#include "libANGLE/Renderbuffer.h"
+#include "libANGLE/renderer/ImageImpl.h"
+
+namespace egl
+{
+ImageSibling::ImageSibling(GLuint id) : RefCountObject(id), mSourcesOf(), mTargetOf()
+{
+}
+
+ImageSibling::~ImageSibling()
+{
+    // EGL images should hold a ref to their targets and siblings, a Texture should not be deletable
+    // while it is attached to an EGL image.
+    ASSERT(mSourcesOf.empty());
+    orphanImages();
+}
+
+void ImageSibling::setTargetImage(egl::Image *imageTarget)
+{
+    ASSERT(imageTarget != nullptr);
+    mTargetOf.set(imageTarget);
+    imageTarget->addTargetSibling(this);
+}
+
+gl::Error ImageSibling::orphanImages()
+{
+    if (mTargetOf.get() != nullptr)
+    {
+        // Can't be a target and have sources.
+        ASSERT(mSourcesOf.empty());
+
+        gl::Error error = mTargetOf->orphanSibling(this);
+        if (error.isError())
+        {
+            return error;
+        }
+
+        mTargetOf.set(nullptr);
+    }
+    else
+    {
+        for (auto &sourceImage : mSourcesOf)
+        {
+            gl::Error error = sourceImage->orphanSibling(this);
+            if (error.isError())
+            {
+                return error;
+            }
+        }
+        mSourcesOf.clear();
+    }
+
+    return gl::Error(GL_NO_ERROR);
+}
+
+void ImageSibling::addImageSource(egl::Image *imageSource)
+{
+    ASSERT(imageSource != nullptr);
+    mSourcesOf.insert(imageSource);
+}
+
+void ImageSibling::removeImageSource(egl::Image *imageSource)
+{
+    ASSERT(mSourcesOf.find(imageSource) != mSourcesOf.end());
+    mSourcesOf.erase(imageSource);
+}
+
+Image::Image(rx::ImageImpl *impl, EGLenum target, ImageSibling *buffer, const AttributeMap &attribs)
+    : RefCountObject(0),
+      mImplementation(impl),
+      mFormat(gl::Format::Invalid()),
+      mWidth(0),
+      mHeight(0),
+      mSamples(0),
+      mSource(),
+      mTargets()
+{
+    ASSERT(mImplementation != nullptr);
+    ASSERT(buffer != nullptr);
+
+    mSource.set(buffer);
+    mSource->addImageSource(this);
+
+    if (IsTextureTarget(target))
+    {
+        gl::Texture *texture = rx::GetAs<gl::Texture>(mSource.get());
+        GLenum textureTarget = egl_gl::EGLImageTargetToGLTextureTarget(target);
+        size_t level         = attribs.get(EGL_GL_TEXTURE_LEVEL_KHR, 0);
+        mFormat              = texture->getFormat(textureTarget, level);
+        mWidth               = texture->getWidth(textureTarget, level);
+        mHeight              = texture->getHeight(textureTarget, level);
+        mSamples             = 0;
+    }
+    else if (IsRenderbufferTarget(target))
+    {
+        gl::Renderbuffer *renderbuffer = rx::GetAs<gl::Renderbuffer>(mSource.get());
+        mFormat                        = renderbuffer->getFormat();
+        mWidth                         = renderbuffer->getWidth();
+        mHeight                        = renderbuffer->getHeight();
+        mSamples                       = renderbuffer->getSamples();
+    }
+    else
+    {
+        UNREACHABLE();
+    }
+}
+
+Image::~Image()
+{
+    SafeDelete(mImplementation);
+
+    // All targets should hold a ref to the egl image and it should not be deleted until there are
+    // no siblings left.
+    ASSERT(mTargets.empty());
+
+    // Tell the source that it is no longer used by this image
+    if (mSource.get() != nullptr)
+    {
+        mSource->removeImageSource(this);
+        mSource.set(nullptr);
+    }
+}
+
+void Image::addTargetSibling(ImageSibling *sibling)
+{
+    mTargets.insert(sibling);
+}
+
+gl::Error Image::orphanSibling(ImageSibling *sibling)
+{
+    // notify impl
+    gl::Error error = mImplementation->orphan(sibling);
+
+    if (mSource.get() == sibling)
+    {
+        // If the sibling is the source, it cannot be a target.
+        ASSERT(mTargets.find(sibling) == mTargets.end());
+
+        mSource.set(nullptr);
+    }
+    else
+    {
+        mTargets.erase(sibling);
+    }
+
+    return error;
+}
+
+const gl::Format &Image::getFormat() const
+{
+    return mFormat;
+}
+
+size_t Image::getWidth() const
+{
+    return mWidth;
+}
+
+size_t Image::getHeight() const
+{
+    return mHeight;
+}
+
+size_t Image::getSamples() const
+{
+    return mSamples;
+}
+
+rx::ImageImpl *Image::getImplementation()
+{
+    return mImplementation;
+}
+
+const rx::ImageImpl *Image::getImplementation() const
+{
+    return mImplementation;
+}
+}  // namespace egl