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120 lines
3.9 KiB
Plaintext
120 lines
3.9 KiB
Plaintext
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/testing/test_metal_surface_impl.h"
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#include <Metal/Metal.h>
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#include "flutter/fml/logging.h"
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#include "flutter/fml/platform/darwin/scoped_nsobject.h"
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#include "third_party/skia/include/core/SkSurface.h"
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namespace flutter {
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TestMetalSurfaceImpl::TestMetalSurfaceImpl(SkISize surface_size) {
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if (surface_size.isEmpty()) {
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FML_LOG(ERROR) << "Size of test Metal surface was empty.";
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return;
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}
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auto device = fml::scoped_nsobject{[MTLCreateSystemDefaultDevice() retain]};
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if (!device) {
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FML_LOG(ERROR) << "Could not acquire Metal device.";
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return;
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}
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auto command_queue = fml::scoped_nsobject{[device.get() newCommandQueue]};
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if (!command_queue) {
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FML_LOG(ERROR) << "Could not create the default command queue.";
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return;
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}
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auto texture_descriptor = fml::scoped_nsobject{
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[[MTLTextureDescriptor texture2DDescriptorWithPixelFormat:MTLPixelFormatBGRA8Unorm
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width:surface_size.width()
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height:surface_size.height()
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mipmapped:NO] retain]};
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// The most pessimistic option and disables all optimizations but allows tests
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// the most flexible access to the surface. They may read and write to the
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// surface from shaders or use as a pixel view.
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texture_descriptor.get().usage = MTLTextureUsageUnknown;
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if (!texture_descriptor) {
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FML_LOG(ERROR) << "Invalid texture descriptor.";
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return;
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}
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auto texture =
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fml::scoped_nsobject{[device.get() newTextureWithDescriptor:texture_descriptor.get()]};
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if (!texture) {
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FML_LOG(ERROR) << "Could not create texture from texture descriptor.";
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return;
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}
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auto skia_context = GrContext::MakeMetal(device.get(), command_queue.get());
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if (skia_context) {
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// Skia wants ownership of the device and queue. If a context was created,
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// we now no longer own the argument. Release the arguments only on
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// successful creation of the context.
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FML_ALLOW_UNUSED_LOCAL(device.release());
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FML_ALLOW_UNUSED_LOCAL(command_queue.release());
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} else {
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FML_LOG(ERROR) << "Could not create the GrContext from the Metal Device "
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"and command queue.";
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return;
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}
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GrMtlTextureInfo skia_texture_info;
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skia_texture_info.fTexture = sk_cf_obj<const void*>{[texture.get() retain]};
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auto backend_render_target = GrBackendRenderTarget{
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surface_size.width(), // width
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surface_size.height(), // height
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1, // sample count
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skia_texture_info // texture info
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};
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auto surface = SkSurface::MakeFromBackendRenderTarget(
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skia_context.get(), // context
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backend_render_target, // backend render target
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kTopLeft_GrSurfaceOrigin, // surface origin
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kBGRA_8888_SkColorType, // color type
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nullptr, // color space
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nullptr, // surface properties
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nullptr, // release proc (texture is already ref counted in sk_cf_obj)
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nullptr // release context
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);
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if (!surface) {
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FML_LOG(ERROR) << "Could not create Skia surface from a Metal texture.";
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return;
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}
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surface_ = std::move(surface);
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context_ = std::move(skia_context);
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is_valid_ = true;
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}
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// |TestMetalSurface|
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TestMetalSurfaceImpl::~TestMetalSurfaceImpl() = default;
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// |TestMetalSurface|
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bool TestMetalSurfaceImpl::IsValid() const {
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return is_valid_;
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}
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// |TestMetalSurface|
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sk_sp<GrContext> TestMetalSurfaceImpl::GetGrContext() const {
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return IsValid() ? context_ : nullptr;
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}
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// |TestMetalSurface|
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sk_sp<SkSurface> TestMetalSurfaceImpl::GetSurface() const {
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return IsValid() ? surface_ : nullptr;
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}
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} // namespace flutter
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