Refactor HWUI readback code to be backend independent

Implement readback from Surface, TextureView and HW Bitmap
for Vulkan pipeline by wrapping the graphics buffer in an SkImage.
Refactor both Vulkan and GL readback to use common code.
TextureView readback is moved from IRenderPipeline interface to
Readback class. Refactor all 3 readback flows to use common
implementation.

Test: Passed all view, uirendering and graphics CTS tests with GL
Test: Passed many CTS test with Vulkan, that require readback
Bug: 113673613
Change-Id: Ifbfd8170a5401f87a709b4b1b9fa058e8e11768d

1 files changed, 0 insertions, 95 deletions

diff --git a/libs/hwui/EglReadback.cpp b/libs/hwui/EglReadback.cpp
deleted file mode 100644
index 65becf88b930..000000000000
--- a/libs/hwui/EglReadback.cpp
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "EglReadback.h"
-
-#include "renderthread/EglManager.h"
-
-#include <gui/Surface.h>
-#include <ui/Fence.h>
-#include <ui/GraphicBuffer.h>
-
-namespace android {
-namespace uirenderer {
-
-CopyResult EglReadback::copySurfaceInto(Surface& surface, const Rect& srcRect, SkBitmap* bitmap) {
-    ATRACE_CALL();
-    // Setup the source
-    sp<GraphicBuffer> sourceBuffer;
-    sp<Fence> sourceFence;
-    Matrix4 texTransform;
-    status_t err = surface.getLastQueuedBuffer(&sourceBuffer, &sourceFence, texTransform.data);
-    texTransform.invalidateType();
-    if (err != NO_ERROR) {
-        ALOGW("Failed to get last queued buffer, error = %d", err);
-        return CopyResult::UnknownError;
-    }
-    if (!sourceBuffer.get()) {
-        ALOGW("Surface doesn't have any previously queued frames, nothing to readback from");
-        return CopyResult::SourceEmpty;
-    }
-    if (sourceBuffer->getUsage() & GRALLOC_USAGE_PROTECTED) {
-        ALOGW("Surface is protected, unable to copy from it");
-        return CopyResult::SourceInvalid;
-    }
-    err = sourceFence->wait(500 /* ms */);
-    if (err != NO_ERROR) {
-        ALOGE("Timeout (500ms) exceeded waiting for buffer fence, abandoning readback attempt");
-        return CopyResult::Timeout;
-    }
-
-    return copyGraphicBufferInto(sourceBuffer.get(), texTransform, srcRect, bitmap);
-}
-
-CopyResult EglReadback::copyGraphicBufferInto(GraphicBuffer* graphicBuffer, Matrix4& texTransform,
-                                              const Rect& srcRect, SkBitmap* bitmap) {
-    mRenderThread.requireGlContext();
-    // TODO: Can't use Image helper since it forces GL_TEXTURE_2D usage via
-    // GL_OES_EGL_image, which doesn't work since we need samplerExternalOES
-    // to be able to properly sample from the buffer.
-
-    // Create the EGLImage object that maps the GraphicBuffer
-    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
-    EGLClientBuffer clientBuffer = (EGLClientBuffer)graphicBuffer->getNativeBuffer();
-    EGLint attrs[] = {EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE};
-
-    EGLImageKHR sourceImage = eglCreateImageKHR(display, EGL_NO_CONTEXT, EGL_NATIVE_BUFFER_ANDROID,
-                                                clientBuffer, attrs);
-
-    if (sourceImage == EGL_NO_IMAGE_KHR) {
-        ALOGW("eglCreateImageKHR failed (%#x)", eglGetError());
-        return CopyResult::UnknownError;
-    }
-
-    uint32_t width = graphicBuffer->getWidth();
-    uint32_t height = graphicBuffer->getHeight();
-    CopyResult copyResult =
-            copyImageInto(sourceImage, texTransform, width, height, srcRect, bitmap);
-
-    eglDestroyImageKHR(display, sourceImage);
-    return copyResult;
-}
-
-CopyResult EglReadback::copyGraphicBufferInto(GraphicBuffer* graphicBuffer, SkBitmap* bitmap) {
-    Rect srcRect;
-    Matrix4 transform;
-    transform.loadScale(1, -1, 1);
-    transform.translate(0, -1);
-    return copyGraphicBufferInto(graphicBuffer, transform, srcRect, bitmap);
-}
-
-}  // namespace uirenderer
-}  // namespace android