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Introduce [Render|Compute]PassEncoder.

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This splits off part of CommandBufferBuilder in separate
RenderPassEncoder and ComputePassEncoder objects. To match the WebGPU
IDL and factor some code, both these encoders inherit from
ProgrammablePassEncoder.

These encoders are pure frontend objects and record into the
CommandBufferBuilder command allocator objects, so no changes to the
backends were needed.

Error handling is still ew, because the "builder" mechanism we had
doesn't allow for "split builders". Nicer error handling will have to
wait on Dawn matching WebGPU.

All the tests and samples were updated to the new structure.

BUG=dawn:5

Change-Id: I5f5d4ad866e2c07fedd1ba7a122258c6610941f1
Reviewed-on: https://dawn-review.googlesource.com/1543
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
This commit is contained in:
Corentin Wallez
2018-09-21 00:24:37 +00:00
committed by Commit Bot service account
parent 31d1e78d57
commit 82fbccbd78
35 changed files with 1303 additions and 863 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
examples/CppHelloTriangle.cpp
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@@ -151,16 +151,18 @@ void frame() {
GetNextRenderPassDescriptor(device, swapchain, depthStencilView, &backbuffer, &renderPass);
static const uint32_t vertexBufferOffsets[1] = {0};
dawn::CommandBuffer commands = device.CreateCommandBufferBuilder()
.BeginRenderPass(renderPass)
.SetRenderPipeline(pipeline)
.SetBindGroup(0, bindGroup)
.SetVertexBuffers(0, 1, &vertexBuffer, vertexBufferOffsets)
.SetIndexBuffer(indexBuffer, 0)
.DrawElements(3, 1, 0, 0)
.EndRenderPass()
.GetResult();
dawn::CommandBufferBuilder builder = device.CreateCommandBufferBuilder();
{
dawn::RenderPassEncoder pass = builder.BeginRenderPass(renderPass);
pass.SetRenderPipeline(pipeline);
pass.SetBindGroup(0, bindGroup);
pass.SetVertexBuffers(0, 1, &vertexBuffer, vertexBufferOffsets);
pass.SetIndexBuffer(indexBuffer, 0);
pass.DrawElements(3, 1, 0, 0);
pass.EndPass();
}
dawn::CommandBuffer commands = builder.GetResult();
queue.Submit(1, &commands);
swapchain.Present(backbuffer);
DoFlush();