| // Copyright 2017 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 "common/Assert.h" |
| #include "utils/ComboRenderPipelineDescriptor.h" |
| #include "utils/WGPUHelpers.h" |
| |
| // Primitive topology tests work by drawing the following vertices with all the different primitive |
| // topology states: |
| // ------------------------------------- |
| // | | |
| // | 1 2 5 | |
| // | | |
| // | | |
| // | | |
| // | | |
| // | 0 3 4 | |
| // | | |
| // ------------------------------------- |
| // |
| // Points: This case looks exactly like above |
| // |
| // Lines |
| // ------------------------------------- |
| // | | |
| // | 1 2 5 | |
| // | | | | | |
| // | | | | | |
| // | | | | | |
| // | | | | | |
| // | 0 3 4 | |
| // | | |
| // ------------------------------------- |
| // |
| // Line Strip |
| // ------------------------------------- |
| // | | |
| // | 1--------2 5 | |
| // | | | | | |
| // | | | | | |
| // | | | | | |
| // | | | | | |
| // | 0 3--------4 | |
| // | | |
| // ------------------------------------- |
| // |
| // Triangle |
| // ------------------------------------- |
| // | | |
| // | 1--------2 5 | |
| // | |xxxxxxx x| | |
| // | |xxxxx xxx| | |
| // | |xxx xxxxx| | |
| // | |x xxxxxxx| | |
| // | 0 3--------4 | |
| // | | |
| // ------------------------------------- |
| // |
| // Triangle Strip |
| // ------------------------------------- |
| // | | |
| // | 1--------2 5 | |
| // | |xxxxxxxxx x| | |
| // | |xxxxxxxxxxx xxx| | |
| // | |xxx xxxxxxxxxxx| | |
| // | |x xxxxxxxxxx| | |
| // | 0 3--------4 | |
| // | | |
| // ------------------------------------- |
| // |
| // Each of these different states is a superset of some of the previous states, |
| // so for every state, we check any new added test locations that are not contained in previous |
| // states We also check that the test locations of subsequent states are untouched |
| |
| constexpr static unsigned int kRTSize = 32; |
| |
| struct TestLocation { |
| unsigned int x, y; |
| }; |
| |
| constexpr TestLocation GetMidpoint(const TestLocation& a, const TestLocation& b) noexcept { |
| return {(a.x + b.x) / 2, (a.y + b.y) / 2}; |
| } |
| |
| constexpr TestLocation GetCentroid(const TestLocation& a, |
| const TestLocation& b, |
| const TestLocation& c) noexcept { |
| return {(a.x + b.x + c.x) / 3, (a.y + b.y + c.y) / 3}; |
| } |
| |
| // clang-format off |
| // Offset towards one corner to avoid x or y symmetry false positives |
| constexpr static unsigned int kOffset = kRTSize / 8; |
| |
| constexpr static TestLocation kPointTestLocations[] = { |
| { kRTSize * 1 / 4 + kOffset, kRTSize * 1 / 4 + kOffset }, |
| { kRTSize * 1 / 4 + kOffset, kRTSize * 3 / 4 + kOffset }, |
| { kRTSize * 2 / 4 + kOffset, kRTSize * 3 / 4 + kOffset }, |
| { kRTSize * 2 / 4 + kOffset, kRTSize * 1 / 4 + kOffset }, |
| { kRTSize * 3 / 4 + kOffset, kRTSize * 1 / 4 + kOffset }, |
| { kRTSize * 3 / 4 + kOffset, kRTSize * 3 / 4 + kOffset }, |
| }; |
| |
| constexpr static TestLocation kLineTestLocations[] = { |
| GetMidpoint(kPointTestLocations[0], kPointTestLocations[1]), |
| GetMidpoint(kPointTestLocations[2], kPointTestLocations[3]), |
| GetMidpoint(kPointTestLocations[4], kPointTestLocations[5]), |
| }; |
| |
| constexpr static TestLocation kLineStripTestLocations[] = { |
| GetMidpoint(kPointTestLocations[1], kPointTestLocations[2]), |
| GetMidpoint(kPointTestLocations[3], kPointTestLocations[4]), |
| }; |
| |
| constexpr static TestLocation kTriangleTestLocations[] = { |
| GetCentroid(kPointTestLocations[0], kPointTestLocations[1], kPointTestLocations[2]), |
| GetCentroid(kPointTestLocations[3], kPointTestLocations[4], kPointTestLocations[5]), |
| }; |
| |
| constexpr static TestLocation kTriangleStripTestLocations[] = { |
| GetCentroid(kPointTestLocations[1], kPointTestLocations[2], kPointTestLocations[3]), |
| GetCentroid(kPointTestLocations[2], kPointTestLocations[3], kPointTestLocations[4]), |
| }; |
| |
| constexpr static float kRTSizef = static_cast<float>(kRTSize); |
| constexpr static float kVertices[] = { |
| 2.f * (kPointTestLocations[0].x + 0.5f) / kRTSizef - 1.f, -2.f * (kPointTestLocations[0].y + 0.5f) / kRTSizef + 1.0f, 0.f, 1.f, |
| 2.f * (kPointTestLocations[1].x + 0.5f) / kRTSizef - 1.f, -2.f * (kPointTestLocations[1].y + 0.5f) / kRTSizef + 1.0f, 0.f, 1.f, |
| 2.f * (kPointTestLocations[2].x + 0.5f) / kRTSizef - 1.f, -2.f * (kPointTestLocations[2].y + 0.5f) / kRTSizef + 1.0f, 0.f, 1.f, |
| 2.f * (kPointTestLocations[3].x + 0.5f) / kRTSizef - 1.f, -2.f * (kPointTestLocations[3].y + 0.5f) / kRTSizef + 1.0f, 0.f, 1.f, |
| 2.f * (kPointTestLocations[4].x + 0.5f) / kRTSizef - 1.f, -2.f * (kPointTestLocations[4].y + 0.5f) / kRTSizef + 1.0f, 0.f, 1.f, |
| 2.f * (kPointTestLocations[5].x + 0.5f) / kRTSizef - 1.f, -2.f * (kPointTestLocations[5].y + 0.5f) / kRTSizef + 1.0f, 0.f, 1.f, |
| }; |
| // clang-format on |
| |
| class PrimitiveTopologyTest : public DawnTest { |
| protected: |
| void SetUp() override { |
| DawnTest::SetUp(); |
| |
| renderPass = utils::CreateBasicRenderPass(device, kRTSize, kRTSize); |
| |
| vsModule = utils::CreateShaderModule(device, R"( |
| [[stage(vertex)]] |
| fn main([[location(0)]] pos : vec4<f32>) -> [[builtin(position)]] vec4<f32> { |
| return pos; |
| })"); |
| |
| fsModule = utils::CreateShaderModule(device, R"( |
| [[stage(fragment)]] fn main() -> [[location(0)]] vec4<f32> { |
| return vec4<f32>(0.0, 1.0, 0.0, 1.0); |
| })"); |
| |
| vertexBuffer = utils::CreateBufferFromData(device, kVertices, sizeof(kVertices), |
| wgpu::BufferUsage::Vertex); |
| } |
| |
| struct LocationSpec { |
| const TestLocation* locations; |
| size_t count; |
| bool include; |
| }; |
| |
| template <std::size_t N> |
| constexpr LocationSpec TestPoints(TestLocation const (&points)[N], bool include) noexcept { |
| return {points, N, include}; |
| } |
| |
| // Draw the vertices with the given primitive topology and check the pixel values of the test |
| // locations |
| void DoTest(wgpu::PrimitiveTopology primitiveTopology, |
| const std::vector<LocationSpec>& locationSpecs) { |
| utils::ComboRenderPipelineDescriptor descriptor; |
| descriptor.vertex.module = vsModule; |
| descriptor.cFragment.module = fsModule; |
| |
| descriptor.primitive.topology = primitiveTopology; |
| if (primitiveTopology == wgpu::PrimitiveTopology::TriangleStrip || |
| primitiveTopology == wgpu::PrimitiveTopology::LineStrip) { |
| descriptor.primitive.stripIndexFormat = wgpu::IndexFormat::Uint32; |
| } |
| |
| descriptor.vertex.bufferCount = 1; |
| descriptor.cBuffers[0].arrayStride = 4 * sizeof(float); |
| descriptor.cBuffers[0].attributeCount = 1; |
| descriptor.cAttributes[0].format = wgpu::VertexFormat::Float32x4; |
| descriptor.cTargets[0].format = renderPass.colorFormat; |
| |
| wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&descriptor); |
| |
| wgpu::CommandEncoder encoder = device.CreateCommandEncoder(); |
| { |
| wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass.renderPassInfo); |
| pass.SetPipeline(pipeline); |
| pass.SetVertexBuffer(0, vertexBuffer); |
| pass.Draw(6); |
| pass.EndPass(); |
| } |
| |
| wgpu::CommandBuffer commands = encoder.Finish(); |
| queue.Submit(1, &commands); |
| |
| for (auto& locationSpec : locationSpecs) { |
| for (size_t i = 0; i < locationSpec.count; ++i) { |
| // If this pixel is included, check that it is green. Otherwise, check that it is |
| // black |
| RGBA8 color = locationSpec.include ? RGBA8::kGreen : RGBA8::kZero; |
| EXPECT_PIXEL_RGBA8_EQ(color, renderPass.color, locationSpec.locations[i].x, |
| locationSpec.locations[i].y) |
| << "Expected (" << locationSpec.locations[i].x << ", " |
| << locationSpec.locations[i].y << ") to be " << color; |
| } |
| } |
| } |
| |
| utils::BasicRenderPass renderPass; |
| wgpu::ShaderModule vsModule; |
| wgpu::ShaderModule fsModule; |
| wgpu::Buffer vertexBuffer; |
| }; |
| |
| // Test Point primitive topology |
| TEST_P(PrimitiveTopologyTest, PointList) { |
| DoTest(wgpu::PrimitiveTopology::PointList, |
| { |
| // Check that the points are drawn |
| TestPoints(kPointTestLocations, true), |
| |
| // Check that line and triangle locations are untouched |
| TestPoints(kLineTestLocations, false), |
| TestPoints(kLineStripTestLocations, false), |
| TestPoints(kTriangleTestLocations, false), |
| TestPoints(kTriangleStripTestLocations, false), |
| }); |
| } |
| |
| // Test Line primitive topology |
| TEST_P(PrimitiveTopologyTest, LineList) { |
| DoTest(wgpu::PrimitiveTopology::LineList, |
| { |
| // Check that lines are drawn |
| TestPoints(kLineTestLocations, true), |
| |
| // Check that line strip and triangle locations are untouched |
| TestPoints(kLineStripTestLocations, false), |
| TestPoints(kTriangleTestLocations, false), |
| TestPoints(kTriangleStripTestLocations, false), |
| }); |
| } |
| |
| // Test LineStrip primitive topology |
| TEST_P(PrimitiveTopologyTest, LineStrip) { |
| DoTest(wgpu::PrimitiveTopology::LineStrip, { |
| // Check that lines are drawn |
| TestPoints(kLineTestLocations, true), |
| TestPoints(kLineStripTestLocations, true), |
| |
| // Check that triangle locations are untouched |
| TestPoints(kTriangleTestLocations, false), |
| TestPoints(kTriangleStripTestLocations, false), |
| }); |
| } |
| |
| // Test Triangle primitive topology |
| TEST_P(PrimitiveTopologyTest, TriangleList) { |
| DoTest(wgpu::PrimitiveTopology::TriangleList, |
| { |
| // Check that triangles are drawn |
| TestPoints(kTriangleTestLocations, true), |
| |
| // Check that triangle strip locations are untouched |
| TestPoints(kTriangleStripTestLocations, false), |
| }); |
| } |
| |
| // Test TriangleStrip primitive topology |
| TEST_P(PrimitiveTopologyTest, TriangleStrip) { |
| DoTest(wgpu::PrimitiveTopology::TriangleStrip, |
| { |
| TestPoints(kTriangleTestLocations, true), |
| TestPoints(kTriangleStripTestLocations, true), |
| }); |
| } |
| |
| DAWN_INSTANTIATE_TEST(PrimitiveTopologyTest, |
| D3D12Backend(), |
| MetalBackend(), |
| OpenGLBackend(), |
| OpenGLESBackend(), |
| VulkanBackend()); |
