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Test that vertex attributes can overlap 

Bug: dawn:433
Change-Id: I47d9ffe16d6ad7730628dc27ec6708006cf4384d
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/22560
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Stephen White <senorblanco@chromium.org>
This commit is contained in:
Austin Eng 2020-06-03 22:47:16 +00:00 committed by Commit Bot service account
parent 0395ca9b66
commit 62b08f845f
1 changed files with 78 additions and 0 deletions
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78
src/tests/end2end/VertexStateTests.cpp
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@ -15,6 +15,7 @@
#include "tests/DawnTest.h"
#include "common/Assert.h"
#include "common/Math.h"
#include "utils/ComboRenderPipelineDescriptor.h"
#include "utils/WGPUHelpers.h"
@ -521,6 +522,83 @@ TEST_P(VertexStateTest, LastAllowedVertexBuffer) {
DoTestDraw(pipeline, 1, 1, {DrawVertexBuffer{kMaxVertexBuffers - 1, &buffer0}});
}
// Test that overlapping vertex attributes are permitted and load data correctly
TEST_P(VertexStateTest, OverlappingVertexAttributes) {
utils::BasicRenderPass renderPass = utils::CreateBasicRenderPass(device, 3, 3);
utils::ComboVertexStateDescriptor vertexState =
MakeVertexState({{16,
InputStepMode::Vertex,
{
// "****" represents the bytes we'll actually read in the shader.
{0, 0 /* offset */, VertexFormat::Float4}, // |****|----|----|----|
{1, 4 /* offset */, VertexFormat::UInt2}, // |****|****|
{2, 8 /* offset */, VertexFormat::Half4}, // |-----****|
{3, 0 /* offset */, VertexFormat::Float}, // |****|
}}});
struct Data {
float fvalue;
uint32_t uints[2];
uint16_t halfs[2];
};
static_assert(sizeof(Data) == 16, "");
Data data {1.f, {2u, 3u}, {Float32ToFloat16(4.f), Float32ToFloat16(5.f)}};
wgpu::Buffer vertexBuffer =
utils::CreateBufferFromData(device, &data, sizeof(data), wgpu::BufferUsage::Vertex);
utils::ComboRenderPipelineDescriptor pipelineDesc(device);
pipelineDesc.vertexStage.module =
utils::CreateShaderModule(device, utils::SingleShaderStage::Vertex, R"(
#version 450
layout(location = 0) in vec4 attr0;
layout(location = 1) in uvec2 attr1;
layout(location = 2) in vec4 attr2;
layout(location = 3) in float attr3;
layout(location = 0) out vec4 color;
void main() {
gl_Position = vec4(0.0, 0.0, 0.0, 1.0);
gl_PointSize = 1.0;
bool success = (
attr0.x == 1.0f &&
attr1.x == 2u &&
attr1.y == 3u &&
attr2.z == 4.0f &&
attr2.w == 5.0f &&
attr3 == 1.0f
);
color = success ? vec4(0.0, 1.0, 0.0, 1.0) : vec4(1.0, 0.0, 0.0, 1.0);
})");
pipelineDesc.cFragmentStage.module =
utils::CreateShaderModule(device, utils::SingleShaderStage::Fragment, R"(
#version 450
layout(location = 0) in vec4 color;
layout(location = 0) out vec4 fragColor;
void main() {
fragColor = color;
})");
pipelineDesc.vertexState = &vertexState;
pipelineDesc.cColorStates[0].format = renderPass.colorFormat;
pipelineDesc.primitiveTopology = wgpu::PrimitiveTopology::PointList;
wgpu::RenderPipeline pipeline = device.CreateRenderPipeline(&pipelineDesc);
wgpu::CommandEncoder encoder = device.CreateCommandEncoder();
wgpu::RenderPassEncoder pass = encoder.BeginRenderPass(&renderPass.renderPassInfo);
pass.SetPipeline(pipeline);
pass.SetVertexBuffer(0, vertexBuffer);
pass.Draw(1);
pass.EndPass();
wgpu::CommandBuffer commands = encoder.Finish();
queue.Submit(1, &commands);
EXPECT_PIXEL_RGBA8_EQ(RGBA8::kGreen, renderPass.color, 1, 1);
}
DAWN_INSTANTIATE_TEST(VertexStateTest, D3D12Backend(), MetalBackend(), OpenGLBackend(), VulkanBackend());
// TODO for the input state: