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Add helpers for backend tests. (#8505)
Both for cleaning up graphics resources at the end of a test and for starting/stopping render loops. BUGS=[402472882]
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-141
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4 files changed

+281
-141
lines changed

‎filament/backend/CMakeLists.txt

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test/ShaderGenerator.cpp
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test/TrianglePrimitive.cpp
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test/Arguments.cpp
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test/Lifetimes.cpp
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test/test_FeedbackLoops.cpp
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test/test_Blit.cpp
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test/test_MissingRequiredAttributes.cpp

‎filament/backend/test/Lifetimes.cpp

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/*
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* Copyright (C) 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "Lifetimes.h"
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#include "backend/Platform.h"
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#include "private/backend/DriverApi.h"
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RenderFrame::RenderFrame(filament::backend::DriverApi& api): mApi(api) {
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mApi.beginFrame(0, 0, 0);
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}
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RenderFrame::~RenderFrame() {
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mApi.endFrame(0);
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}
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Cleanup::Cleanup(filament::backend::DriverApi& driverApi) : mDriverApi(driverApi) {}
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Cleanup::~Cleanup() {
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for (const auto swapChain: mSwapChains) {
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mDriverApi.destroySwapChain(swapChain);
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}
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for (const auto descriptorSet : mDescriptorSets) {
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mDriverApi.destroyDescriptorSet(descriptorSet);
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}
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for (const auto descriptorSetLayout : mDescriptorSetLayouts) {
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mDriverApi.destroyDescriptorSetLayout(descriptorSetLayout);
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}
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for (const auto bufferObject : mBufferObjects) {
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mDriverApi.destroyBufferObject(bufferObject);
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}
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for (const auto program : mPrograms) {
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mDriverApi.destroyProgram(program);
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}
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for (const auto texture : mTextures) {
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mDriverApi.destroyTexture(texture);
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}
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for (const auto renderTarget : mRenderTargets) {
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mDriverApi.destroyRenderTarget(renderTarget);
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}
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for (const auto& callback : mCallbacks) {
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callback();
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}
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}
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template <>
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void Cleanup::addInternal(filament::backend::SwapChainHandle handle) {
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mSwapChains.push_back(handle);
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}
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template <>
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void Cleanup::addInternal(filament::backend::DescriptorSetHandle handle) {
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mDescriptorSets.push_back(handle);
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}
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template <>
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void Cleanup::addInternal(
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filament::backend::DescriptorSetLayoutHandle handle) {
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mDescriptorSetLayouts.push_back(handle);
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}
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template <>
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void Cleanup::addInternal(filament::backend::BufferObjectHandle handle) {
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mBufferObjects.push_back(handle);
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}
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template <>
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void Cleanup::addInternal(filament::backend::ProgramHandle handle) {
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mPrograms.push_back(handle);
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}
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template <>
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void Cleanup::addInternal(filament::backend::TextureHandle handle) {
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mTextures.push_back(handle);
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}
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template <>
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void Cleanup::addInternal(filament::backend::RenderTargetHandle handle) {
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mRenderTargets.push_back(handle);
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}
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void Cleanup::addPostCall(std::function<void()> callback){
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mCallbacks.emplace_back(std::move(callback));
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}

‎filament/backend/test/Lifetimes.h

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/*
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* Copyright (C) 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TNT_LIFETIMES_H
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#define TNT_LIFETIMES_H
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#include <vector>
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#include <functional>
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#include <optional>
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#include "backend/Handle.h"
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#include "backend/DriverApiForward.h"
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#include "BackendTest.h"
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class RenderFrame {
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public:
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explicit RenderFrame(filament::backend::DriverApi& api);
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~RenderFrame();
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RenderFrame(RenderFrame const& rhs) noexcept = delete;
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RenderFrame& operator=(RenderFrame const& rhs) noexcept = delete;
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RenderFrame(RenderFrame const&& rhs) noexcept = delete;
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RenderFrame& operator=(RenderFrame const&& rhs) noexcept = delete;
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private:
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filament::backend::DriverApi& mApi;
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};
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class Cleanup {
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public:
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/**
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* @param driverApi Must be valid for the entire lifetime of the Cleanup object.
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*/
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explicit Cleanup(filament::backend::DriverApi& driverApi);
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~Cleanup();
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template <typename HandleType>
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filament::backend::Handle<HandleType> add(filament::backend::Handle<HandleType> handle);
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void addPostCall(std::function<void()> callback);
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private:
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template <typename HandleType>
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void addInternal(filament::backend::Handle<HandleType> handle);
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filament::backend::DriverApi & mDriverApi;
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std::vector<filament::backend::SwapChainHandle> mSwapChains;
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std::vector<filament::backend::DescriptorSetHandle> mDescriptorSets;
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std::vector<filament::backend::DescriptorSetLayoutHandle> mDescriptorSetLayouts;
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std::vector<filament::backend::BufferObjectHandle> mBufferObjects;
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std::vector<filament::backend::ProgramHandle> mPrograms;
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std::vector<filament::backend::TextureHandle> mTextures;
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std::vector<filament::backend::RenderTargetHandle> mRenderTargets;
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std::vector<std::function<void()>> mCallbacks;
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};
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template <typename HandleType>
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filament::backend::Handle<HandleType> Cleanup::add(filament::backend::Handle<HandleType> handle) {
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addInternal(handle);
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return handle;
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}
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#endif //TNT_LIFETIMES_H

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