/*
 * Copyright 2018 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

// This is a GPU-backend specific test. It relies on static intializers to work

#include "include/core/SkTypes.h"

#if defined(SK_VULKAN)

#include "include/core/SkImage.h"
#include "include/gpu/GrBackendSurface.h"
#include "include/gpu/GrDirectContext.h"
#include "include/gpu/vk/GrVkTypes.h"
#include "include/gpu/vk/GrVkVulkan.h"
#include "src/gpu/GrSurfaceDrawContext.h"
#include "src/gpu/GrTexture.h"
#include "src/gpu/GrTextureProxy.h"
#include "src/gpu/SkGpuDevice.h"
#include "src/gpu/vk/GrVkGpu.h"
#include "src/gpu/vk/GrVkImageLayout.h"
#include "src/gpu/vk/GrVkTexture.h"
#include "src/image/SkImage_Base.h"
#include "src/image/SkImage_GpuBase.h"
#include "src/image/SkSurface_Gpu.h"
#include "tests/Test.h"
#include "tools/gpu/ManagedBackendTexture.h"
#include "tools/gpu/ProxyUtils.h"

DEF_GPUTEST_FOR_VULKAN_CONTEXT(VkImageLayoutTest, reporter, ctxInfo) {
    auto dContext = ctxInfo.directContext();

    auto mbet = sk_gpu_test::ManagedBackendTexture::MakeWithoutData(
            dContext, 1, 1, kRGBA_8888_SkColorType, GrMipmapped::kNo, GrRenderable::kNo);
    if (!mbet) {
        ERRORF(reporter, "Could not create backend texture.");
        return;
    }

    GrVkImageInfo info;
    REPORTER_ASSERT(reporter, mbet->texture().getVkImageInfo(&info));
    VkImageLayout initLayout = info.fImageLayout;

    // Verify that setting that layout via a copy of a backendTexture is reflected in all the
    // backendTextures.
    GrBackendTexture backendTex1 = mbet->texture();
    GrBackendTexture backendTex2 = backendTex1;
    REPORTER_ASSERT(reporter, backendTex2.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    backendTex2.setVkImageLayout(VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);

    REPORTER_ASSERT(reporter, backendTex1.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL == info.fImageLayout);

    REPORTER_ASSERT(reporter, backendTex2.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL == info.fImageLayout);

    // Setting back the layout since we didn't actually change it
    backendTex1.setVkImageLayout(initLayout);

    sk_sp<SkImage> wrappedImage = SkImage::MakeFromTexture(
            dContext,
            backendTex1,
            kTopLeft_GrSurfaceOrigin,
            kRGBA_8888_SkColorType,
            kPremul_SkAlphaType,
            /*color space*/ nullptr,
            sk_gpu_test::ManagedBackendTexture::ReleaseProc,
            mbet->releaseContext());
    REPORTER_ASSERT(reporter, wrappedImage.get());

    GrSurfaceProxy* proxy = sk_gpu_test::GetTextureImageProxy(wrappedImage.get(), dContext);
    REPORTER_ASSERT(reporter, proxy);
    REPORTER_ASSERT(reporter, proxy->isInstantiated());
    GrTexture* texture = proxy->peekTexture();
    REPORTER_ASSERT(reporter, texture);

    // Verify that modifying the layout via the GrVkTexture is reflected in the GrBackendTexture
    GrVkAttachment* vkTexture = static_cast<GrVkTexture*>(texture)->textureAttachment();
    REPORTER_ASSERT(reporter, initLayout == vkTexture->currentLayout());
    vkTexture->updateImageLayout(VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);

    REPORTER_ASSERT(reporter, backendTex1.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL == info.fImageLayout);

    GrBackendTexture backendTexImage = wrappedImage->getBackendTexture(false);
    REPORTER_ASSERT(reporter, backendTexImage.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL == info.fImageLayout);

    // Verify that modifying the layout via the GrBackendTexutre is reflected in the GrVkTexture
    backendTexImage.setVkImageLayout(VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
    REPORTER_ASSERT(reporter, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL == vkTexture->currentLayout());

    vkTexture->updateImageLayout(initLayout);

    REPORTER_ASSERT(reporter, backendTex1.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    REPORTER_ASSERT(reporter, backendTex2.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    REPORTER_ASSERT(reporter, backendTexImage.getVkImageInfo(&info));
    REPORTER_ASSERT(reporter, initLayout == info.fImageLayout);

    // Check that we can do things like assigning the backend texture to invalid one, assign an
    // invalid one, assin a backend texture to inself etc. Success here is that we don't hit any of
    // our ref counting asserts.
    REPORTER_ASSERT(reporter, GrBackendTexture::TestingOnly_Equals(backendTex1, backendTex2));

    GrBackendTexture invalidTexture;
    REPORTER_ASSERT(reporter, !invalidTexture.isValid());
    REPORTER_ASSERT(reporter, !GrBackendTexture::TestingOnly_Equals(invalidTexture, backendTex2));

    backendTex2 = invalidTexture;
    REPORTER_ASSERT(reporter, !backendTex2.isValid());
    REPORTER_ASSERT(reporter, !GrBackendTexture::TestingOnly_Equals(invalidTexture, backendTex2));

    invalidTexture = backendTex1;
    REPORTER_ASSERT(reporter, invalidTexture.isValid());
    REPORTER_ASSERT(reporter, GrBackendTexture::TestingOnly_Equals(invalidTexture, backendTex1));

    invalidTexture = static_cast<decltype(invalidTexture)&>(invalidTexture);
    REPORTER_ASSERT(reporter, invalidTexture.isValid());
    REPORTER_ASSERT(reporter, GrBackendTexture::TestingOnly_Equals(invalidTexture, invalidTexture));
}

// This test is disabled because it executes illegal vulkan calls which cause the validations layers
// to fail and makes us assert. Once fixed to use a valid vulkan call sequence it should be
// renenabled, see skbug.com/8936.
#if 0
// Test to make sure we transition from the EXTERNAL queue even when no layout transition is needed.
DEF_GPUTEST_FOR_VULKAN_CONTEXT(VkTransitionExternalQueueTest, reporter, ctxInfo) {
    auto dContext = ctxInfo.directContext();
    GrGpu* gpu = dContext->priv().getGpu();
    GrVkGpu* vkGpu = static_cast<GrVkGpu*>(gpu);
    if (!vkGpu->vkCaps().supportsExternalMemory()) {
        return;
    }

    GrBackendTexture backendTex = dContext->createBackendTexture(
            1, 1, kRGBA_8888_SkColorType,
            SkColors::kTransparent, GrMipmapped::kNo, GrRenderable::kNo);
    sk_sp<SkImage> image;
    // Make a backend texture with an external queue family and general layout.
    GrVkImageInfo vkInfo;
    if (!backendTex.getVkImageInfo(&vkInfo)) {
        return;
    }
    vkInfo.fCurrentQueueFamily = VK_QUEUE_FAMILY_EXTERNAL;
    // Use a read-only layout as these are the ones where we can otherwise skip a transition.
    vkInfo.fImageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;

    GrBackendTexture vkExtTex(1, 1, vkInfo);
    REPORTER_ASSERT(reporter, vkExtTex.isValid());
    image = SkImage::MakeFromTexture(dContext, vkExtTex, kTopLeft_GrSurfaceOrigin,
                                     kRGBA_8888_SkColorType, kPremul_SkAlphaType, nullptr, nullptr,
                                     nullptr);

    if (!image) {
        return;
    }

    GrTexture* texture = image->getTexture();
    REPORTER_ASSERT(reporter, texture);
    GrVkTexture* vkTex = static_cast<GrVkTexture*>(texture);

    // Change our backend texture to the internal queue, with the same layout. This should force a
    // queue transition even though the layouts match.
    vkTex->setImageLayout(vkGpu, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL, 0,
                          VK_PIPELINE_STAGE_TOP_OF_PIPE_BIT, false, false);

    // Get our image info again and make sure we transitioned queues.
    GrBackendTexture newBackendTexture = image->getBackendTexture(true);
    GrVkImageInfo newVkInfo;
    REPORTER_ASSERT(reporter, newBackendTexture.getVkImageInfo(&newVkInfo));
    REPORTER_ASSERT(reporter, newVkInfo.fCurrentQueueFamily == vkGpu->queueIndex());

    image.reset();
    dContext->submit(true);
    dContext->deleteBackendTexture(backendTex);
}
#endif

#endif