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[embedder] [metal] Embedder API can support externally composited Met…
…al textures (flutter#24327)
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shell/platform/darwin/macos/framework/Source/FlutterEmbedderExternalTextureUnittests.mm
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| // Copyright 2013 The Flutter Authors. All rights reserved. | ||
| // Use of this source code is governed by a BSD-style license that can be | ||
| // found in the LICENSE file. | ||
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| #import <Foundation/Foundation.h> | ||
| #import <Metal/Metal.h> | ||
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| #include <memory> | ||
| #include <vector> | ||
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| #import "flutter/shell/platform/darwin/graphics/FlutterDarwinContextMetal.h" | ||
| #import "flutter/shell/platform/darwin/graphics/FlutterDarwinExternalTextureMetal.h" | ||
| #include "flutter/shell/platform/embedder/embedder.h" | ||
| #include "flutter/shell/platform/embedder/embedder_external_texture_metal.h" | ||
| #import "flutter/testing/testing.h" | ||
| #include "third_party/googletest/googletest/include/gtest/gtest.h" | ||
| #include "third_party/skia/include/core/SkImage.h" | ||
| #include "third_party/skia/include/core/SkSamplingOptions.h" | ||
| #include "third_party/skia/include/core/SkSurface.h" | ||
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| namespace flutter::testing { | ||
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| TEST(FlutterEmbedderExternalTextureUnittests, TestTextureResolution) { | ||
| // constants. | ||
| const size_t width = 100; | ||
| const size_t height = 100; | ||
| const int64_t texture_id = 1; | ||
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| // setup the surface. | ||
| FlutterDarwinContextMetal* darwinContextMetal = | ||
| [[FlutterDarwinContextMetal alloc] initWithDefaultMTLDevice]; | ||
| SkImageInfo info = SkImageInfo::MakeN32Premul(width, height); | ||
| GrDirectContext* grContext = darwinContextMetal.mainContext.get(); | ||
| sk_sp<SkSurface> gpuSurface(SkSurface::MakeRenderTarget(grContext, SkBudgeted::kNo, info)); | ||
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| // create a texture. | ||
| MTLTextureDescriptor* textureDescriptor = [[MTLTextureDescriptor alloc] init]; | ||
| textureDescriptor.pixelFormat = MTLPixelFormatBGRA8Unorm; | ||
| textureDescriptor.width = width; | ||
| textureDescriptor.height = height; | ||
| textureDescriptor.usage = MTLTextureUsageRenderTarget | MTLTextureUsageShaderRead; | ||
| id<MTLTexture> mtlTexture = | ||
| [darwinContextMetal.device newTextureWithDescriptor:textureDescriptor]; | ||
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| // callback to resolve the texture. | ||
| EmbedderExternalTextureMetal::ExternalTextureCallback callback = [&](int64_t texture_id, size_t w, | ||
| size_t h) { | ||
| EXPECT_TRUE(w == width); | ||
| EXPECT_TRUE(h == height); | ||
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| FlutterMetalExternalTexture* texture = new FlutterMetalExternalTexture(); | ||
| texture->struct_size = sizeof(FlutterMetalExternalTexture); | ||
| texture->num_textures = 1; | ||
| texture->height = h; | ||
| texture->width = w; | ||
| texture->pixel_format = FlutterMetalExternalTexturePixelFormat::kRGBA; | ||
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| std::vector<FlutterMetalTextureHandle> textures = { | ||
| (__bridge FlutterMetalTextureHandle)mtlTexture, | ||
| }; | ||
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| texture->textures = textures.data(); | ||
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| return std::unique_ptr<FlutterMetalExternalTexture>(texture); | ||
| }; | ||
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| // render the texture. | ||
| std::unique_ptr<flutter::Texture> texture = | ||
| std::make_unique<EmbedderExternalTextureMetal>(texture_id, callback); | ||
| SkRect bounds = SkRect::MakeWH(info.width(), info.height()); | ||
| SkSamplingOptions sampling = SkSamplingOptions(SkFilterMode::kNearest); | ||
| texture->Paint(*gpuSurface->getCanvas(), bounds, /*freeze=*/false, grContext, sampling); | ||
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| ASSERT_TRUE(mtlTexture != nil); | ||
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| gpuSurface->makeImageSnapshot(); | ||
| } | ||
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| } // namespace flutter::testing |
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