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// 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"
constexpr uint32_t kRTSize = 4;
class DrawIndirectTest : public DawnTest {
protected:
void SetUp() override {
DawnTest::SetUp();
renderPass = utils::CreateBasicRenderPass(device, kRTSize, kRTSize);
wgpu::ShaderModule vsModule = utils::CreateShaderModule(device, R"(
[[stage(vertex)]]
fn main([[location(0)]] pos : vec4<f32>) -> [[builtin(position)]] vec4<f32> {
return pos;
})");
wgpu::ShaderModule fsModule = utils::CreateShaderModule(device, R"(
[[stage(fragment)]] fn main() -> [[location(0)]] vec4<f32> {
return vec4<f32>(0.0, 1.0, 0.0, 1.0);
})");
utils::ComboRenderPipelineDescriptor2 descriptor;
descriptor.vertex.module = vsModule;
descriptor.cFragment.module = fsModule;
descriptor.primitive.topology = wgpu::PrimitiveTopology::TriangleStrip;
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;
pipeline = device.CreateRenderPipeline2(&descriptor);
vertexBuffer = utils::CreateBufferFromData<float>(
device, wgpu::BufferUsage::Vertex,
{// The bottom left triangle
-1.0f, 1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 0.0f, 1.0f, -1.0f, -1.0f, 0.0f, 1.0f,
// The top right triangle
-1.0f, 1.0f, 0.0f, 1.0f, 1.0f, -1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f});
}
utils::BasicRenderPass renderPass;
wgpu::RenderPipeline pipeline;
wgpu::Buffer vertexBuffer;
void Test(std::initializer_list<uint32_t> bufferList,
uint64_t indirectOffset,
RGBA8 bottomLeftExpected,
RGBA8 topRightExpected) {
wgpu::Buffer indirectBuffer =
utils::CreateBufferFromData<uint32_t>(device, wgpu::BufferUsage::Indirect, bufferList);
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
{
wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass.renderPassInfo);
pass.SetPipeline(pipeline);
pass.SetVertexBuffer(0, vertexBuffer);
pass.DrawIndirect(indirectBuffer, indirectOffset);
pass.EndPass();
}
wgpu::CommandBuffer commands = encoder.Finish();
queue.Submit(1, &commands);
EXPECT_PIXEL_RGBA8_EQ(bottomLeftExpected, renderPass.color, 1, 3);
EXPECT_PIXEL_RGBA8_EQ(topRightExpected, renderPass.color, 3, 1);
}
};
// The basic triangle draw.
TEST_P(DrawIndirectTest, Uint32) {
RGBA8 filled(0, 255, 0, 255);
RGBA8 notFilled(0, 0, 0, 0);
// Test a draw with no indices.
Test({0, 0, 0, 0}, 0, notFilled, notFilled);
// Test a draw with only the first 3 indices (bottom left triangle)
Test({3, 1, 0, 0}, 0, filled, notFilled);
// Test a draw with only the last 3 indices (top right triangle)
Test({3, 1, 3, 0}, 0, notFilled, filled);
// Test a draw with all 6 indices (both triangles).
Test({6, 1, 0, 0}, 0, filled, filled);
}
TEST_P(DrawIndirectTest, IndirectOffset) {
RGBA8 filled(0, 255, 0, 255);
RGBA8 notFilled(0, 0, 0, 0);
// Test an offset draw call, with indirect buffer containing 2 calls:
// 1) only the first 3 indices (bottom left triangle)
// 2) only the last 3 indices (top right triangle)
// Test #1 (no offset)
Test({3, 1, 0, 0, 3, 1, 3, 0}, 0, filled, notFilled);
// Offset to draw #2
Test({3, 1, 0, 0, 3, 1, 3, 0}, 4 * sizeof(uint32_t), notFilled, filled);
}
DAWN_INSTANTIATE_TEST(DrawIndirectTest,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());