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// Copyright 2021 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 RenderAttachmentTest : public DawnTest {};
// Test that it is ok to have more fragment outputs than color attachments.
// There should be no backend validation errors or indexing out-of-bounds.
TEST_P(RenderAttachmentTest, MoreFragmentOutputsThanAttachments) {
wgpu::ShaderModule vsModule = utils::CreateShaderModule(device, R"(
[[stage(vertex)]]
fn main() -> [[builtin(position)]] vec4<f32> {
return vec4<f32>(0.0, 0.0, 0.0, 1.0);
})");
wgpu::ShaderModule fsModule = utils::CreateShaderModule(device, R"(
struct Output {
[[location(0)]] color0 : vec4<f32>;
[[location(1)]] color1 : vec4<f32>;
[[location(2)]] color2 : vec4<f32>;
[[location(3)]] color3 : vec4<f32>;
};
[[stage(fragment)]]
fn main() -> Output {
var output : Output;
output.color0 = vec4<f32>(1.0, 0.0, 0.0, 1.0);
output.color1 = vec4<f32>(0.0, 1.0, 0.0, 1.0);
output.color2 = vec4<f32>(0.0, 0.0, 1.0, 1.0);
output.color3 = vec4<f32>(1.0, 1.0, 0.0, 1.0);
return output;
})");
// Fragment outputs 1, 2, 3 are written in the shader, but unused by the pipeline.
utils::ComboRenderPipelineDescriptor pipelineDesc;
pipelineDesc.vertex.module = vsModule;
pipelineDesc.cFragment.module = fsModule;
pipelineDesc.primitive.topology = wgpu::PrimitiveTopology::PointList;
pipelineDesc.cTargets[0].format = wgpu::TextureFormat::RGBA8Unorm;
pipelineDesc.cFragment.targetCount = 1;
wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&pipelineDesc);
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
wgpu::TextureDescriptor textureDesc;
textureDesc.size = {1, 1, 1};
textureDesc.format = wgpu::TextureFormat::RGBA8Unorm;
textureDesc.usage = wgpu::TextureUsage::RenderAttachment | wgpu::TextureUsage::CopySrc;
wgpu::Texture renderTarget = device.CreateTexture(&textureDesc);
utils::ComboRenderPassDescriptor renderPass({renderTarget.CreateView()});
wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass);
pass.SetPipeline(pipeline);
pass.Draw(1);
pass.EndPass();
wgpu::CommandBuffer commands = encoder.Finish();
queue.Submit(1, &commands);
EXPECT_PIXEL_RGBA8_EQ(RGBA8::kRed, renderTarget, 0, 0);
}
DAWN_INSTANTIATE_TEST(RenderAttachmentTest,
D3D12Backend(),
D3D12Backend({}, {"use_d3d12_render_pass"}),
MetalBackend(),
OpenGLBackend(),
OpenGLESBackend(),
VulkanBackend());