// Copyright 2019 The Dawn Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "tests/DawnTest.h"

#include "utils/ComboRenderPipelineDescriptor.h"
#include "utils/WGPUHelpers.h"

class ObjectCachingTest : public DawnTest {};

// Test that BindGroupLayouts are correctly deduplicated.
TEST_P(ObjectCachingTest, BindGroupLayoutDeduplication) {
    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer}});
    wgpu::BindGroupLayout sameBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer}});
    wgpu::BindGroupLayout otherBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Vertex, wgpu::BindingType::UniformBuffer}});

    EXPECT_NE(bgl.Get(), otherBgl.Get());
    EXPECT_EQ(bgl.Get() == sameBgl.Get(), !UsesWire());
}

// Test that two similar bind group layouts won't refer to the same one if they differ by dynamic.
TEST_P(ObjectCachingTest, BindGroupLayoutDynamic) {
    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer, true}});
    wgpu::BindGroupLayout sameBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer, true}});
    wgpu::BindGroupLayout otherBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer, false}});

    EXPECT_NE(bgl.Get(), otherBgl.Get());
    EXPECT_EQ(bgl.Get() == sameBgl.Get(), !UsesWire());
}

// Test that two similar bind group layouts won't refer to the same one if they differ by
// textureComponentType
TEST_P(ObjectCachingTest, BindGroupLayoutTextureComponentType) {
    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::SampledTexture, false, false,
                  wgpu::TextureViewDimension::e2D, wgpu::TextureComponentType::Float}});
    wgpu::BindGroupLayout sameBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::SampledTexture, false, false,
                  wgpu::TextureViewDimension::e2D, wgpu::TextureComponentType::Float}});
    wgpu::BindGroupLayout otherBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::SampledTexture, false, false,
                  wgpu::TextureViewDimension::e2D, wgpu::TextureComponentType::Uint}});

    EXPECT_NE(bgl.Get(), otherBgl.Get());
    EXPECT_EQ(bgl.Get() == sameBgl.Get(), !UsesWire());
}

// Test that two similar bind group layouts won't refer to the same one if they differ by
// textureDimension
TEST_P(ObjectCachingTest, BindGroupLayoutTextureDimension) {
    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::SampledTexture, false, false,
                  wgpu::TextureViewDimension::e2D, wgpu::TextureComponentType::Float}});
    wgpu::BindGroupLayout sameBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::SampledTexture, false, false,
                  wgpu::TextureViewDimension::e2D, wgpu::TextureComponentType::Float}});
    wgpu::BindGroupLayout otherBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::SampledTexture, false, false,
                  wgpu::TextureViewDimension::e2DArray, wgpu::TextureComponentType::Float}});

    EXPECT_NE(bgl.Get(), otherBgl.Get());
    EXPECT_EQ(bgl.Get() == sameBgl.Get(), !UsesWire());
}

// Test that an error object doesn't try to uncache itself
TEST_P(ObjectCachingTest, ErrorObjectDoesntUncache) {
    ASSERT_DEVICE_ERROR(
        wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
            device, {{0, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer},
                     {0, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer}}));
}

// Test that PipelineLayouts are correctly deduplicated.
TEST_P(ObjectCachingTest, PipelineLayoutDeduplication) {
    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer}});
    wgpu::BindGroupLayout otherBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Vertex, wgpu::BindingType::UniformBuffer}});

    wgpu::PipelineLayout pl = utils::MakeBasicPipelineLayout(device, &bgl);
    wgpu::PipelineLayout samePl = utils::MakeBasicPipelineLayout(device, &bgl);
    wgpu::PipelineLayout otherPl1 = utils::MakeBasicPipelineLayout(device, nullptr);
    wgpu::PipelineLayout otherPl2 = utils::MakeBasicPipelineLayout(device, &otherBgl);

    EXPECT_NE(pl.Get(), otherPl1.Get());
    EXPECT_NE(pl.Get(), otherPl2.Get());
    EXPECT_EQ(pl.Get() == samePl.Get(), !UsesWire());
}

// Test that ShaderModules are correctly deduplicated.
TEST_P(ObjectCachingTest, ShaderModuleDeduplication) {
    wgpu::ShaderModule module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            layout(location = 0) out vec4 fragColor;
            void main() {
                fragColor = vec4(0.0, 1.0, 0.0, 1.0);
            })");
    wgpu::ShaderModule sameModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            layout(location = 0) out vec4 fragColor;
            void main() {
                fragColor = vec4(0.0, 1.0, 0.0, 1.0);
            })");
    wgpu::ShaderModule otherModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            layout(location = 0) out vec4 fragColor;
            void main() {
                fragColor = vec4(0.0);
            })");

    EXPECT_NE(module.Get(), otherModule.Get());
    EXPECT_EQ(module.Get() == sameModule.Get(), !UsesWire());
}

// Test that ComputePipeline are correctly deduplicated wrt. their ShaderModule
TEST_P(ObjectCachingTest, ComputePipelineDeduplicationOnShaderModule) {
    wgpu::ShaderModule module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Compute, R"(
            #version 450
            void main() {
                int i = 0;
            })");
    wgpu::ShaderModule sameModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Compute, R"(
            #version 450
            void main() {
                int i = 0;
            })");
    wgpu::ShaderModule otherModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Compute, R"(
            #version 450
            void main() {
            })");

    EXPECT_NE(module.Get(), otherModule.Get());
    EXPECT_EQ(module.Get() == sameModule.Get(), !UsesWire());

    wgpu::PipelineLayout layout = utils::MakeBasicPipelineLayout(device, nullptr);

    wgpu::ComputePipelineDescriptor desc;
    desc.computeStage.entryPoint = "main";
    desc.layout = layout;

    desc.computeStage.module = module;
    wgpu::ComputePipeline pipeline = device.CreateComputePipeline(&desc);

    desc.computeStage.module = sameModule;
    wgpu::ComputePipeline samePipeline = device.CreateComputePipeline(&desc);

    desc.computeStage.module = otherModule;
    wgpu::ComputePipeline otherPipeline = device.CreateComputePipeline(&desc);

    EXPECT_NE(pipeline.Get(), otherPipeline.Get());
    EXPECT_EQ(pipeline.Get() == samePipeline.Get(), !UsesWire());
}

// Test that ComputePipeline are correctly deduplicated wrt. their layout
TEST_P(ObjectCachingTest, ComputePipelineDeduplicationOnLayout) {
    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer}});
    wgpu::BindGroupLayout otherBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Vertex, wgpu::BindingType::UniformBuffer}});

    wgpu::PipelineLayout pl = utils::MakeBasicPipelineLayout(device, &bgl);
    wgpu::PipelineLayout samePl = utils::MakeBasicPipelineLayout(device, &bgl);
    wgpu::PipelineLayout otherPl = utils::MakeBasicPipelineLayout(device, nullptr);

    EXPECT_NE(pl.Get(), otherPl.Get());
    EXPECT_EQ(pl.Get() == samePl.Get(), !UsesWire());

    wgpu::ComputePipelineDescriptor desc;
    desc.computeStage.entryPoint = "main";
    desc.computeStage.module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Compute, R"(
            #version 450
            void main() {
                int i = 0;
            })");

    desc.layout = pl;
    wgpu::ComputePipeline pipeline = device.CreateComputePipeline(&desc);

    desc.layout = samePl;
    wgpu::ComputePipeline samePipeline = device.CreateComputePipeline(&desc);

    desc.layout = otherPl;
    wgpu::ComputePipeline otherPipeline = device.CreateComputePipeline(&desc);

    EXPECT_NE(pipeline.Get(), otherPipeline.Get());
    EXPECT_EQ(pipeline.Get() == samePipeline.Get(), !UsesWire());
}

// Test that RenderPipelines are correctly deduplicated wrt. their layout
TEST_P(ObjectCachingTest, RenderPipelineDeduplicationOnLayout) {
    wgpu::BindGroupLayout bgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Fragment, wgpu::BindingType::UniformBuffer}});
    wgpu::BindGroupLayout otherBgl = utils::MakeBindGroupLayout(
        device, {{1, wgpu::ShaderStage::Vertex, wgpu::BindingType::UniformBuffer}});

    wgpu::PipelineLayout pl = utils::MakeBasicPipelineLayout(device, &bgl);
    wgpu::PipelineLayout samePl = utils::MakeBasicPipelineLayout(device, &bgl);
    wgpu::PipelineLayout otherPl = utils::MakeBasicPipelineLayout(device, nullptr);

    EXPECT_NE(pl.Get(), otherPl.Get());
    EXPECT_EQ(pl.Get() == samePl.Get(), !UsesWire());

    utils::ComboRenderPipelineDescriptor desc(device);
    desc.vertexStage.module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, R"(
            #version 450
            void main() {
                gl_Position = vec4(0.0);
            })");
    desc.cFragmentStage.module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            void main() {
            })");

    desc.layout = pl;
    wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&desc);

    desc.layout = samePl;
    wgpu::RenderPipeline samePipeline = device.CreateRenderPipeline(&desc);

    desc.layout = otherPl;
    wgpu::RenderPipeline otherPipeline = device.CreateRenderPipeline(&desc);

    EXPECT_NE(pipeline.Get(), otherPipeline.Get());
    EXPECT_EQ(pipeline.Get() == samePipeline.Get(), !UsesWire());
}

// Test that RenderPipelines are correctly deduplicated wrt. their vertex module
TEST_P(ObjectCachingTest, RenderPipelineDeduplicationOnVertexModule) {
    wgpu::ShaderModule module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, R"(
            #version 450
            void main() {
                gl_Position = vec4(0.0);
            })");
    wgpu::ShaderModule sameModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, R"(
            #version 450
            void main() {
                gl_Position = vec4(0.0);
            })");
    wgpu::ShaderModule otherModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, R"(
            #version 450
            void main() {
                gl_Position = vec4(1.0);
            })");

    EXPECT_NE(module.Get(), otherModule.Get());
    EXPECT_EQ(module.Get() == sameModule.Get(), !UsesWire());

    utils::ComboRenderPipelineDescriptor desc(device);
    desc.cFragmentStage.module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            void main() {
            })");

    desc.vertexStage.module = module;
    wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&desc);

    desc.vertexStage.module = sameModule;
    wgpu::RenderPipeline samePipeline = device.CreateRenderPipeline(&desc);

    desc.vertexStage.module = otherModule;
    wgpu::RenderPipeline otherPipeline = device.CreateRenderPipeline(&desc);

    EXPECT_NE(pipeline.Get(), otherPipeline.Get());
    EXPECT_EQ(pipeline.Get() == samePipeline.Get(), !UsesWire());
}

// Test that RenderPipelines are correctly deduplicated wrt. their fragment module
TEST_P(ObjectCachingTest, RenderPipelineDeduplicationOnFragmentModule) {
    wgpu::ShaderModule module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            void main() {
            })");
    wgpu::ShaderModule sameModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            void main() {
            })");
    wgpu::ShaderModule otherModule =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
            #version 450
            void main() {
                int i = 0;
            })");

    EXPECT_NE(module.Get(), otherModule.Get());
    EXPECT_EQ(module.Get() == sameModule.Get(), !UsesWire());

    utils::ComboRenderPipelineDescriptor desc(device);
    desc.vertexStage.module =
        utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, R"(
            #version 450
            void main() {
                gl_Position = vec4(0.0);
            })");

    desc.cFragmentStage.module = module;
    wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&desc);

    desc.cFragmentStage.module = sameModule;
    wgpu::RenderPipeline samePipeline = device.CreateRenderPipeline(&desc);

    desc.cFragmentStage.module = otherModule;
    wgpu::RenderPipeline otherPipeline = device.CreateRenderPipeline(&desc);

    EXPECT_NE(pipeline.Get(), otherPipeline.Get());
    EXPECT_EQ(pipeline.Get() == samePipeline.Get(), !UsesWire());
}

// Test that Samplers are correctly deduplicated.
TEST_P(ObjectCachingTest, SamplerDeduplication) {
    wgpu::SamplerDescriptor samplerDesc = utils::GetDefaultSamplerDescriptor();
    wgpu::Sampler sampler = device.CreateSampler(&samplerDesc);

    wgpu::SamplerDescriptor sameSamplerDesc = utils::GetDefaultSamplerDescriptor();
    wgpu::Sampler sameSampler = device.CreateSampler(&sameSamplerDesc);

    wgpu::SamplerDescriptor otherSamplerDescAddressModeU = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescAddressModeU.addressModeU = wgpu::AddressMode::ClampToEdge;
    wgpu::Sampler otherSamplerAddressModeU = device.CreateSampler(&otherSamplerDescAddressModeU);

    wgpu::SamplerDescriptor otherSamplerDescAddressModeV = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescAddressModeV.addressModeV = wgpu::AddressMode::ClampToEdge;
    wgpu::Sampler otherSamplerAddressModeV = device.CreateSampler(&otherSamplerDescAddressModeV);

    wgpu::SamplerDescriptor otherSamplerDescAddressModeW = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescAddressModeW.addressModeW = wgpu::AddressMode::ClampToEdge;
    wgpu::Sampler otherSamplerAddressModeW = device.CreateSampler(&otherSamplerDescAddressModeW);

    wgpu::SamplerDescriptor otherSamplerDescMagFilter = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescMagFilter.magFilter = wgpu::FilterMode::Nearest;
    wgpu::Sampler otherSamplerMagFilter = device.CreateSampler(&otherSamplerDescMagFilter);

    wgpu::SamplerDescriptor otherSamplerDescMinFilter = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescMinFilter.minFilter = wgpu::FilterMode::Nearest;
    wgpu::Sampler otherSamplerMinFilter = device.CreateSampler(&otherSamplerDescMinFilter);

    wgpu::SamplerDescriptor otherSamplerDescMipmapFilter = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescMipmapFilter.mipmapFilter = wgpu::FilterMode::Nearest;
    wgpu::Sampler otherSamplerMipmapFilter = device.CreateSampler(&otherSamplerDescMipmapFilter);

    wgpu::SamplerDescriptor otherSamplerDescLodMinClamp = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescLodMinClamp.lodMinClamp += 1;
    wgpu::Sampler otherSamplerLodMinClamp = device.CreateSampler(&otherSamplerDescLodMinClamp);

    wgpu::SamplerDescriptor otherSamplerDescLodMaxClamp = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescLodMaxClamp.lodMaxClamp += 1;
    wgpu::Sampler otherSamplerLodMaxClamp = device.CreateSampler(&otherSamplerDescLodMaxClamp);

    wgpu::SamplerDescriptor otherSamplerDescCompareFunction = utils::GetDefaultSamplerDescriptor();
    otherSamplerDescCompareFunction.compare = wgpu::CompareFunction::Always;
    wgpu::Sampler otherSamplerCompareFunction =
        device.CreateSampler(&otherSamplerDescCompareFunction);

    EXPECT_NE(sampler.Get(), otherSamplerAddressModeU.Get());
    EXPECT_NE(sampler.Get(), otherSamplerAddressModeV.Get());
    EXPECT_NE(sampler.Get(), otherSamplerAddressModeW.Get());
    EXPECT_NE(sampler.Get(), otherSamplerMagFilter.Get());
    EXPECT_NE(sampler.Get(), otherSamplerMinFilter.Get());
    EXPECT_NE(sampler.Get(), otherSamplerMipmapFilter.Get());
    EXPECT_NE(sampler.Get(), otherSamplerLodMinClamp.Get());
    EXPECT_NE(sampler.Get(), otherSamplerLodMaxClamp.Get());
    EXPECT_NE(sampler.Get(), otherSamplerCompareFunction.Get());
    EXPECT_EQ(sampler.Get() == sameSampler.Get(), !UsesWire());
}

DAWN_INSTANTIATE_TEST(ObjectCachingTest, D3D12Backend, MetalBackend, OpenGLBackend, VulkanBackend);