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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, utils::SingleShaderStage::Vertex, R"(
#version 450
layout(location = 0) in vec4 pos;
void main() {
gl_Position = pos;
})");
wgpu::ShaderModule 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);
})");
utils::ComboRenderPipelineDescriptor descriptor(device);
descriptor.vertexStage.module = vsModule;
descriptor.cFragmentStage.module = fsModule;
descriptor.primitiveTopology = wgpu::PrimitiveTopology::TriangleStrip;
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;
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});
}
utils::BasicRenderPass renderPass;
wgpu::RenderPipeline pipeline;
wgpu::Buffer vertexBuffer;
wgpu::Buffer indexBuffer;
void Test(uint32_t indexCount,
uint32_t instanceCount,
uint32_t firstIndex,
int32_t baseVertex,
uint32_t firstInstance,
uint64_t bufferOffset,
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(indexBuffer, 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);
}
// Test the parameter 'baseVertex' of DrawIndexed() works.
TEST_P(DrawIndexedTest, BaseVertex) {
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(), VulkanBackend());