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// Copyright 2018 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 DrawIndexedTest : 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::ComboRenderPipelineDescriptor 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.CreateRenderPipeline(&descriptor);
vertexBuffer = utils::CreateBufferFromData<float>(
device, wgpu::BufferUsage::Vertex,
{// First quad: the first 3 vertices represent 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, 1.0f, 1.0f,
0.0f, 1.0f,
// Second quad: the first 3 vertices represent 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, -1.0f, -1.0f,
0.0f, 1.0f});
indexBuffer = utils::CreateBufferFromData<uint32_t>(
device, wgpu::BufferUsage::Index,
{0, 1, 2, 0, 3, 1,
// The indices below are added to test negatve baseVertex
0 + 4, 1 + 4, 2 + 4, 0 + 4, 3 + 4, 1 + 4});
zeroSizedIndexBuffer =
utils::CreateBufferFromData<uint32_t>(device, wgpu::BufferUsage::Index, {});
}
utils::BasicRenderPass renderPass;
wgpu::RenderPipeline pipeline;
wgpu::Buffer vertexBuffer;
wgpu::Buffer indexBuffer;
wgpu::Buffer zeroSizedIndexBuffer;
void Test(uint32_t indexCount,
uint32_t instanceCount,
uint32_t firstIndex,
int32_t baseVertex,
uint32_t firstInstance,
uint64_t bufferOffset,
RGBA8 bottomLeftExpected,
RGBA8 topRightExpected) {
// Regular draw with a reasonable index buffer
TestImplementation(indexCount, instanceCount, firstIndex, baseVertex, firstInstance,
bufferOffset, indexBuffer, bottomLeftExpected, topRightExpected);
}
void TestZeroSizedIndexBufferDraw(uint32_t indexCount,
uint32_t firstIndex,
RGBA8 bottomLeftExpected,
RGBA8 topRightExpected) {
TestImplementation(indexCount, 1, firstIndex, 0, 0, 0, zeroSizedIndexBuffer,
bottomLeftExpected, topRightExpected);
}
void TestImplementation(uint32_t indexCount,
uint32_t instanceCount,
uint32_t firstIndex,
int32_t baseVertex,
uint32_t firstInstance,
uint64_t bufferOffset,
const wgpu::Buffer& curIndexBuffer,
RGBA8 bottomLeftExpected,
RGBA8 topRightExpected) {
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
{
wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass.renderPassInfo);
pass.SetPipeline(pipeline);
pass.SetVertexBuffer(0, vertexBuffer);
pass.SetIndexBuffer(curIndexBuffer, wgpu::IndexFormat::Uint32, bufferOffset);
pass.DrawIndexed(indexCount, instanceCount, firstIndex, baseVertex, firstInstance);
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 most basic DrawIndexed triangle draw.
TEST_P(DrawIndexedTest, 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, 0, notFilled, notFilled);
// Test a draw with only the first 3 indices of the first quad (bottom left triangle)
Test(3, 1, 0, 0, 0, 0, filled, notFilled);
// Test a draw with only the last 3 indices of the first quad (top right triangle)
Test(3, 1, 3, 0, 0, 0, notFilled, filled);
// Test a draw with all 6 indices (both triangles).
Test(6, 1, 0, 0, 0, 0, filled, filled);
}
// Out of bounds drawIndexed are treated as no-ops instead of invalid operations
// Some agreements: https://github.com/gpuweb/gpuweb/issues/955
TEST_P(DrawIndexedTest, OutOfBounds) {
RGBA8 filled(0, 255, 0, 255);
RGBA8 notFilled(0, 0, 0, 0);
// a valid draw.
Test(6, 1, 0, 0, 0, 0, filled, filled);
// indexCount is 0 but firstIndex out of bound
Test(0, 1, 20, 0, 0, 0, notFilled, notFilled);
// indexCount + firstIndex out of bound
Test(6, 1, 7, 0, 0, 0, notFilled, notFilled);
// only firstIndex out of bound
Test(6, 1, 20, 0, 0, 0, notFilled, notFilled);
// firstIndex much larger than the bound
Test(6, 1, 10000, 0, 0, 0, notFilled, notFilled);
// only indexCount out of bound
Test(20, 1, 0, 0, 0, 0, notFilled, notFilled);
// indexCount much larger than the bound
Test(10000, 1, 0, 0, 0, 0, notFilled, notFilled);
// max uint32_t indexCount and firstIndex
Test(std::numeric_limits<uint32_t>::max(), 1, std::numeric_limits<uint32_t>::max(), 0, 0, 0,
notFilled, notFilled);
// max uint32_t indexCount and small firstIndex
Test(std::numeric_limits<uint32_t>::max(), 1, 2, 0, 0, 0, notFilled, notFilled);
// small indexCount and max uint32_t firstIndex
Test(2, 1, std::numeric_limits<uint32_t>::max(), 0, 0, 0, notFilled, notFilled);
}
TEST_P(DrawIndexedTest, ZeroSizedIndexBuffer) {
RGBA8 notFilled(0, 0, 0, 0);
// IndexBuffer size is zero, so index access is always out of bounds
TestZeroSizedIndexBufferDraw(3, 1, notFilled, notFilled);
TestZeroSizedIndexBufferDraw(0, 1, notFilled, notFilled);
TestZeroSizedIndexBufferDraw(3, 0, notFilled, notFilled);
TestZeroSizedIndexBufferDraw(0, 0, notFilled, notFilled);
}
// Test the parameter 'baseVertex' of DrawIndexed() works.
TEST_P(DrawIndexedTest, BaseVertex) {
DAWN_TEST_UNSUPPORTED_IF(HasToggleEnabled("disable_base_vertex"));
RGBA8 filled(0, 255, 0, 255);
RGBA8 notFilled(0, 0, 0, 0);
// Test a draw with only the first 3 indices of the second quad (top right triangle)
Test(3, 1, 0, 4, 0, 0, notFilled, filled);
// Test a draw with only the last 3 indices of the second quad (bottom left triangle)
Test(3, 1, 3, 4, 0, 0, filled, notFilled);
// Test negative baseVertex
// Test a draw with only the first 3 indices of the first quad (bottom left triangle)
Test(3, 1, 0, -4, 0, 6 * sizeof(uint32_t), filled, notFilled);
// Test a draw with only the last 3 indices of the first quad (top right triangle)
Test(3, 1, 3, -4, 0, 6 * sizeof(uint32_t), notFilled, filled);
}
DAWN_INSTANTIATE_TEST(DrawIndexedTest,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());