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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gpu/command_buffer/service/shared_image_test_utils.h"
#include "gpu/command_buffer/common/mailbox.h"
#include "gpu/command_buffer/service/shared_context_state.h"
#include "gpu/command_buffer/service/shared_image_factory.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkPromiseImageTexture.h"
#include "third_party/skia/include/gpu/GrBackendSemaphore.h"
#include "ui/gfx/geometry/size.h"
namespace gpu {
std::vector<uint8_t> ReadPixels(
Mailbox mailbox,
gfx::Size size,
SharedContextState* context_state,
SharedImageRepresentationFactory* representation_factory) {
DCHECK(context_state);
EXPECT_TRUE(
context_state->MakeCurrent(context_state->surface(), true /* needs_gl*/));
auto skia_representation =
representation_factory->ProduceSkia(mailbox, context_state);
EXPECT_TRUE(skia_representation);
std::vector<GrBackendSemaphore> begin_semaphores;
std::vector<GrBackendSemaphore> end_semaphores;
std::unique_ptr<SharedImageRepresentationSkia::ScopedReadAccess>
scoped_read_access;
scoped_read_access = skia_representation->BeginScopedReadAccess(
&begin_semaphores, &end_semaphores);
auto* promise_texture = scoped_read_access->promise_image_texture();
EXPECT_EQ(0u, begin_semaphores.size());
EXPECT_EQ(0u, end_semaphores.size());
EXPECT_TRUE(promise_texture);
GrBackendTexture backend_texture = promise_texture->backendTexture();
EXPECT_TRUE(backend_texture.isValid());
EXPECT_EQ(size.width(), backend_texture.width());
EXPECT_EQ(size.height(), backend_texture.height());
// Create an Sk Image from GrBackendTexture.
auto sk_image = SkImage::MakeFromTexture(
context_state->gr_context(), promise_texture->backendTexture(),
kTopLeft_GrSurfaceOrigin, kRGBA_8888_SkColorType, kOpaque_SkAlphaType,
nullptr);
SkImageInfo dst_info =
SkImageInfo::Make(size.width(), size.height(), kRGBA_8888_SkColorType,
kOpaque_SkAlphaType, nullptr);
const int num_pixels = size.width() * size.height();
std::vector<uint8_t> dst_pixels(num_pixels * 4);
// Read back pixels from Sk Image.
EXPECT_TRUE(sk_image->readPixels(dst_info, dst_pixels.data(),
dst_info.minRowBytes(), 0, 0));
scoped_read_access.reset();
return dst_pixels;
}
} // namespace gpu
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