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RenderPassEncoder.cpp
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RenderPassEncoder.cpp
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/WebGPUBinding.h"
#include "RenderPassEncoder.h"
#include "BindGroup.h"
#include "CommandEncoder.h"
#include "RenderPipeline.h"
namespace mozilla {
namespace webgpu {
GPU_IMPL_CYCLE_COLLECTION(RenderPassEncoder, mParent)
GPU_IMPL_JS_WRAP(RenderPassEncoder)
ffi::WGPULoadOp ConvertLoadOp(const dom::GPULoadOp& aOp) {
switch (aOp) {
case dom::GPULoadOp::Load:
return ffi::WGPULoadOp_Load;
default:
MOZ_CRASH("Unexpected load op");
}
}
ffi::WGPUStoreOp ConvertStoreOp(const dom::GPUStoreOp& aOp) {
switch (aOp) {
case dom::GPUStoreOp::Store:
return ffi::WGPUStoreOp_Store;
case dom::GPUStoreOp::Clear:
return ffi::WGPUStoreOp_Clear;
default:
MOZ_CRASH("Unexpected load op");
}
}
ffi::WGPUColor ConvertColor(const dom::GPUColorDict& aColor) {
ffi::WGPUColor color = {aColor.mR, aColor.mG, aColor.mB, aColor.mA};
return color;
}
ffi::WGPURawPass BeginRenderPass(RawId aEncoderId,
const dom::GPURenderPassDescriptor& aDesc) {
ffi::WGPURenderPassDescriptor desc = {};
ffi::WGPURenderPassDepthStencilAttachmentDescriptor dsDesc = {};
if (aDesc.mDepthStencilAttachment.WasPassed()) {
const auto& dsa = aDesc.mDepthStencilAttachment.Value();
dsDesc.attachment = dsa.mAttachment->mId;
if (dsa.mDepthLoadValue.IsFloat()) {
dsDesc.depth_load_op = ffi::WGPULoadOp_Clear;
dsDesc.clear_depth = dsa.mDepthLoadValue.GetAsFloat();
}
if (dsa.mDepthLoadValue.IsGPULoadOp()) {
dsDesc.depth_load_op =
ConvertLoadOp(dsa.mDepthLoadValue.GetAsGPULoadOp());
}
dsDesc.depth_store_op = ConvertStoreOp(dsa.mDepthStoreOp);
if (dsa.mStencilLoadValue.IsUnsignedLong()) {
dsDesc.stencil_load_op = ffi::WGPULoadOp_Clear;
dsDesc.clear_stencil = dsa.mStencilLoadValue.GetAsUnsignedLong();
}
if (dsa.mStencilLoadValue.IsGPULoadOp()) {
dsDesc.stencil_load_op =
ConvertLoadOp(dsa.mStencilLoadValue.GetAsGPULoadOp());
}
dsDesc.stencil_store_op = ConvertStoreOp(dsa.mStencilStoreOp);
desc.depth_stencil_attachment = &dsDesc;
}
std::array<ffi::WGPURenderPassColorAttachmentDescriptor,
WGPUMAX_COLOR_TARGETS>
colorDescs = {};
desc.color_attachments = colorDescs.data();
desc.color_attachments_length = aDesc.mColorAttachments.Length();
for (size_t i = 0; i < aDesc.mColorAttachments.Length(); ++i) {
const auto& ca = aDesc.mColorAttachments[i];
ffi::WGPURenderPassColorAttachmentDescriptor& cd = colorDescs[i];
cd.attachment = ca.mAttachment->mId;
cd.store_op = ConvertStoreOp(ca.mStoreOp);
if (ca.mResolveTarget.WasPassed()) {
cd.resolve_target = &ca.mResolveTarget.Value().mId;
}
if (ca.mLoadValue.IsGPULoadOp()) {
cd.load_op = ConvertLoadOp(ca.mLoadValue.GetAsGPULoadOp());
} else {
cd.load_op = ffi::WGPULoadOp_Clear;
if (ca.mLoadValue.IsDoubleSequence()) {
const auto& seq = ca.mLoadValue.GetAsDoubleSequence();
if (seq.Length() >= 1) {
cd.clear_color.r = seq[0];
}
if (seq.Length() >= 2) {
cd.clear_color.g = seq[1];
}
if (seq.Length() >= 3) {
cd.clear_color.b = seq[2];
}
if (seq.Length() >= 4) {
cd.clear_color.a = seq[3];
}
}
if (ca.mLoadValue.IsGPUColorDict()) {
cd.clear_color = ConvertColor(ca.mLoadValue.GetAsGPUColorDict());
}
}
}
return ffi::wgpu_command_encoder_begin_render_pass(aEncoderId, &desc);
}
RenderPassEncoder::RenderPassEncoder(CommandEncoder* const aParent,
const dom::GPURenderPassDescriptor& aDesc)
: ChildOf(aParent), mRaw(BeginRenderPass(aParent->mId, aDesc)) {
for (const auto& at : aDesc.mColorAttachments) {
mUsedTextureViews.push_back(at.mAttachment);
}
if (aDesc.mDepthStencilAttachment.WasPassed()) {
mUsedTextureViews.push_back(
aDesc.mDepthStencilAttachment.Value().mAttachment);
}
}
RenderPassEncoder::~RenderPassEncoder() {
if (mValid) {
mValid = false;
ffi::wgpu_render_pass_destroy(mRaw);
}
}
void RenderPassEncoder::SetBindGroup(
uint32_t aSlot, const BindGroup& aBindGroup,
const dom::Sequence<uint32_t>& aDynamicOffsets) {
if (mValid) {
mUsedBindGroups.push_back(&aBindGroup);
ffi::wgpu_render_pass_set_bind_group(&mRaw, aSlot, aBindGroup.mId,
aDynamicOffsets.Elements(),
aDynamicOffsets.Length());
}
}
void RenderPassEncoder::SetPipeline(const RenderPipeline& aPipeline) {
if (mValid) {
mUsedPipelines.push_back(&aPipeline);
ffi::wgpu_render_pass_set_pipeline(&mRaw, aPipeline.mId);
}
}
void RenderPassEncoder::SetIndexBuffer(const Buffer& aBuffer,
uint64_t aOffset) {
if (mValid) {
mUsedBuffers.push_back(&aBuffer);
ffi::wgpu_render_pass_set_index_buffer(&mRaw, aBuffer.mId, aOffset);
}
}
void RenderPassEncoder::SetVertexBuffer(uint32_t aSlot, const Buffer& aBuffer,
uint64_t aOffset) {
if (mValid) {
mUsedBuffers.push_back(&aBuffer);
// TODO: change the Rust API to use a single vertex buffer?
ffi::wgpu_render_pass_set_vertex_buffers(&mRaw, aSlot, &aBuffer.mId,
&aOffset, 1);
}
}
void RenderPassEncoder::Draw(uint32_t aVertexCount, uint32_t aInstanceCount,
uint32_t aFirstVertex, uint32_t aFirstInstance) {
if (mValid) {
ffi::wgpu_render_pass_draw(&mRaw, aVertexCount, aInstanceCount,
aFirstVertex, aFirstInstance);
}
}
void RenderPassEncoder::DrawIndexed(uint32_t aIndexCount,
uint32_t aInstanceCount,
uint32_t aFirstIndex, int32_t aBaseVertex,
uint32_t aFirstInstance) {
if (mValid) {
ffi::wgpu_render_pass_draw_indexed(&mRaw, aIndexCount, aInstanceCount,
aFirstIndex, aBaseVertex,
aFirstInstance);
}
}
void RenderPassEncoder::EndPass(ErrorResult& aRv) {
if (mValid) {
mValid = false;
uintptr_t length = 0;
const uint8_t* pass_data = ffi::wgpu_render_pass_finish(&mRaw, &length);
mParent->EndRenderPass(Span(pass_data, length), aRv);
ffi::wgpu_render_pass_destroy(mRaw);
}
}
} // namespace webgpu
} // namespace mozilla