/*
 * Copyright 2019 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "src/gpu/ganesh/GrTransferFromRenderTask.h"

#include "src/gpu/ganesh/GrGpu.h"
#include "src/gpu/ganesh/GrOpFlushState.h"
#include "src/gpu/ganesh/GrResourceAllocator.h"

void GrTransferFromRenderTask::gatherProxyIntervals(GrResourceAllocator* alloc) const {
    // This renderTask doesn't have "normal" ops. In this case we still need to add an interval (so
    // fEndOfOpsTaskOpIndices will remain in sync), so we create a fake op# to capture the fact that
    // we read fSrcProxy.
    alloc->addInterval(fSrcProxy.get(), alloc->curOp(), alloc->curOp(),
                       GrResourceAllocator::ActualUse::kYes,
                       GrResourceAllocator::AllowRecycling::kYes);
    alloc->incOps();
}

GrRenderTask::ExecutionResult GrTransferFromRenderTask::onExecute(GrOpFlushState* flushState) {
    SkASSERT(!fWasExecuted); // These are one-time tasks
    SkDEBUGCODE(fWasExecuted = true;)

    if (!fSrcProxy->isInstantiated()) {
        return ExecutionResult::RanButFailed();
    }
    fExecutionSuccess = flushState->gpu()->transferPixelsFrom(fSrcProxy->peekSurface(),
                                                              fSrcRect,
                                                              fSurfaceColorType,
                                                              fDstColorType,
                                                              fDstBuffer,
                                                              fDstOffset);
    return ExecutionResult::Ran(fExecutionSuccess);
}