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/*
* 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
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