// 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(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 TestSetUp() override { DawnTest::TestSetUp(); renderPass = utils::CreateBasicRenderPass(device, kRTSize, kRTSize); vsModule = utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, R"( #version 450 layout(location = 0) in vec4 pos; void main() { gl_Position = pos; gl_PointSize = 1.0; })"); fsModule = 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); })"); vertexBuffer = utils::CreateBufferFromData(device, kVertices, sizeof(kVertices), wgpu::BufferUsage::Vertex); } struct LocationSpec { const TestLocation* locations; size_t count; bool include; }; template 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& locationSpecs) { utils::ComboRenderPipelineDescriptor descriptor(device); descriptor.vertexStage.module = vsModule; descriptor.cFragmentStage.module = fsModule; descriptor.primitiveTopology = primitiveTopology; descriptor.cVertexState.vertexBufferCount = 1; descriptor.cVertexState.cVertexBuffers[0].arrayStride = 4 * sizeof(float); descriptor.cVertexState.cVertexBuffers[0].attributeCount = 1; descriptor.cVertexState.cAttributes[0].format = wgpu::VertexFormat::Float4; descriptor.cColorStates[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, 1, 0, 0); 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 ? kGreen : 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, VulkanBackend);