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// 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 "utils/ComboRenderPipelineDescriptor.h"
#include "utils/WGPUHelpers.h"
class ViewportOrientationTests : public DawnTest {};
// Test that the pixel in viewport coordinate (-1, -1) matches texel (0, 0)
TEST_P(ViewportOrientationTests, OriginAt0x0) {
utils::BasicRenderPass renderPass = utils::CreateBasicRenderPass(device, 2, 2);
wgpu::ShaderModule vsModule = utils::CreateShaderModule(device, R"(
[[stage(vertex)]] fn main() -> [[builtin(position)]] vec4<f32> {
return vec4<f32>(-0.5, 0.5, 0.0, 1.0);
})");
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::PointList;
descriptor.cTargets[0].format = renderPass.colorFormat;
wgpu::RenderPipeline pipeline = device.CreateRenderPipeline2(&descriptor);
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
{
wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass.renderPassInfo);
pass.SetPipeline(pipeline);
pass.Draw(1);
pass.EndPass();
}
wgpu::CommandBuffer commands = encoder.Finish();
queue.Submit(1, &commands);
EXPECT_PIXEL_RGBA8_EQ(RGBA8::kGreen, renderPass.color, 0, 0);
EXPECT_PIXEL_RGBA8_EQ(RGBA8::kZero, renderPass.color, 0, 1);
EXPECT_PIXEL_RGBA8_EQ(RGBA8::kZero, renderPass.color, 1, 0);
EXPECT_PIXEL_RGBA8_EQ(RGBA8::kZero, renderPass.color, 1, 1);
}
DAWN_INSTANTIATE_TEST(ViewportOrientationTests,
D3D12Backend(),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());