mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-14 06:57:27 +01:00
508 lines
16 KiB
Go
508 lines
16 KiB
Go
// Copyright 2022 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package directx
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import (
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"fmt"
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"math"
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"unsafe"
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"github.com/hajimehoshi/ebiten/v2/internal/graphics"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
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)
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const numDescriptorsPerFrame = 32
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func blendFactorToBlend(f graphicsdriver.BlendFactor, alpha bool) _D3D12_BLEND {
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// D3D12_RENDER_TARGET_BLEND_DESC's *BlendAlpha members don't allow *_COLOR values.
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// See https://learn.microsoft.com/en-us/windows/win32/api/d3d12/ns-d3d12-d3d12_render_target_blend_desc.
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switch f {
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case graphicsdriver.BlendFactorZero:
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return _D3D12_BLEND_ZERO
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case graphicsdriver.BlendFactorOne:
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return _D3D12_BLEND_ONE
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case graphicsdriver.BlendFactorSourceColor:
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if alpha {
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return _D3D12_BLEND_SRC_ALPHA
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}
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return _D3D12_BLEND_SRC_COLOR
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case graphicsdriver.BlendFactorOneMinusSourceColor:
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if alpha {
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return _D3D12_BLEND_INV_SRC_ALPHA
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}
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return _D3D12_BLEND_INV_SRC_COLOR
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case graphicsdriver.BlendFactorSourceAlpha:
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return _D3D12_BLEND_SRC_ALPHA
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case graphicsdriver.BlendFactorOneMinusSourceAlpha:
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return _D3D12_BLEND_INV_SRC_ALPHA
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case graphicsdriver.BlendFactorDestinationColor:
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if alpha {
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return _D3D12_BLEND_DEST_ALPHA
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}
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return _D3D12_BLEND_DEST_COLOR
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case graphicsdriver.BlendFactorOneMinusDestinationColor:
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if alpha {
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return _D3D12_BLEND_INV_DEST_ALPHA
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}
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return _D3D12_BLEND_INV_DEST_COLOR
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case graphicsdriver.BlendFactorDestinationAlpha:
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return _D3D12_BLEND_DEST_ALPHA
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case graphicsdriver.BlendFactorOneMinusDestinationAlpha:
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return _D3D12_BLEND_INV_DEST_ALPHA
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case graphicsdriver.BlendFactorSourceAlphaSaturated:
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return _D3D12_BLEND_SRC_ALPHA_SAT
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default:
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panic(fmt.Sprintf("directx: invalid blend factor: %d", f))
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}
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}
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func blendOperationToBlendOp(o graphicsdriver.BlendOperation) _D3D12_BLEND_OP {
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switch o {
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case graphicsdriver.BlendOperationAdd:
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return _D3D12_BLEND_OP_ADD
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case graphicsdriver.BlendOperationSubtract:
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return _D3D12_BLEND_OP_SUBTRACT
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case graphicsdriver.BlendOperationReverseSubtract:
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return _D3D12_BLEND_OP_REV_SUBTRACT
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default:
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panic(fmt.Sprintf("directx: invalid blend operation: %d", o))
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}
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}
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type pipelineStates struct {
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rootSignature *_ID3D12RootSignature
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shaderDescriptorHeap *_ID3D12DescriptorHeap
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shaderDescriptorSize uint32
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samplerDescriptorHeap *_ID3D12DescriptorHeap
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constantBuffers [frameCount][]*_ID3D12Resource
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constantBufferMaps [frameCount][]uintptr
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}
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const numConstantBufferAndSourceTextures = 1 + graphics.ShaderImageCount
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func (p *pipelineStates) initialize(device *_ID3D12Device) (ferr error) {
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// Create a CBV/SRV/UAV descriptor heap.
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// 5n+0: constants
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// 5n+m (1<=4): textures
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shaderH, err := device.CreateDescriptorHeap(&_D3D12_DESCRIPTOR_HEAP_DESC{
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Type: _D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV,
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NumDescriptors: frameCount * numDescriptorsPerFrame * numConstantBufferAndSourceTextures,
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Flags: _D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE,
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NodeMask: 0,
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})
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if err != nil {
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return err
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}
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p.shaderDescriptorHeap = shaderH
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defer func() {
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if ferr != nil {
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p.shaderDescriptorHeap.Release()
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p.shaderDescriptorHeap = nil
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}
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}()
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p.shaderDescriptorSize = device.GetDescriptorHandleIncrementSize(_D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV)
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samplerH, err := device.CreateDescriptorHeap(&_D3D12_DESCRIPTOR_HEAP_DESC{
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Type: _D3D12_DESCRIPTOR_HEAP_TYPE_SAMPLER,
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NumDescriptors: 1,
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Flags: _D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE,
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NodeMask: 0,
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})
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if err != nil {
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return err
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}
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p.samplerDescriptorHeap = samplerH
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h, err := p.samplerDescriptorHeap.GetCPUDescriptorHandleForHeapStart()
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if err != nil {
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return err
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}
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device.CreateSampler(&_D3D12_SAMPLER_DESC{
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Filter: _D3D12_FILTER_MIN_MAG_MIP_POINT,
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AddressU: _D3D12_TEXTURE_ADDRESS_MODE_WRAP,
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AddressV: _D3D12_TEXTURE_ADDRESS_MODE_WRAP,
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AddressW: _D3D12_TEXTURE_ADDRESS_MODE_WRAP,
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ComparisonFunc: _D3D12_COMPARISON_FUNC_NEVER,
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MinLOD: -math.MaxFloat32,
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MaxLOD: math.MaxFloat32,
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}, h)
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return nil
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}
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func (p *pipelineStates) useGraphicsPipelineState(device *_ID3D12Device, commandList *_ID3D12GraphicsCommandList, frameIndex int, pipelineState *_ID3D12PipelineState, srcs [graphics.ShaderImageCount]*Image, uniforms []float32) error {
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idx := len(p.constantBuffers[frameIndex])
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if idx >= numDescriptorsPerFrame {
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return fmt.Errorf("directx: too many constant buffers")
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}
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if cap(p.constantBuffers[frameIndex]) > idx {
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p.constantBuffers[frameIndex] = p.constantBuffers[frameIndex][:idx+1]
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p.constantBufferMaps[frameIndex] = p.constantBufferMaps[frameIndex][:idx+1]
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} else {
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p.constantBuffers[frameIndex] = append(p.constantBuffers[frameIndex], nil)
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p.constantBufferMaps[frameIndex] = append(p.constantBufferMaps[frameIndex], 0)
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}
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const bufferSizeAlignement = 256
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bufferSize := uint32(unsafe.Sizeof(float32(0))) * uint32(len(uniforms))
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if bufferSize > 0 {
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bufferSize = ((bufferSize-1)/bufferSizeAlignement + 1) * bufferSizeAlignement
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}
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cb := p.constantBuffers[frameIndex][idx]
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m := p.constantBufferMaps[frameIndex][idx]
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if cb != nil {
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if uint32(cb.GetDesc().Width) < bufferSize {
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p.constantBuffers[frameIndex][idx].Unmap(0, nil)
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p.constantBuffers[frameIndex][idx].Release()
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p.constantBuffers[frameIndex][idx] = nil
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p.constantBufferMaps[frameIndex][idx] = 0
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cb = nil
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}
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}
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if cb == nil {
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var err error
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cb, err = createBuffer(device, uint64(bufferSize), _D3D12_HEAP_TYPE_UPLOAD)
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if err != nil {
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return err
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}
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p.constantBuffers[frameIndex][idx] = cb
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h, err := p.shaderDescriptorHeap.GetCPUDescriptorHandleForHeapStart()
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if err != nil {
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return err
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}
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offset := int32(numConstantBufferAndSourceTextures * (frameIndex*numDescriptorsPerFrame + idx))
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h.Offset(offset, p.shaderDescriptorSize)
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device.CreateConstantBufferView(&_D3D12_CONSTANT_BUFFER_VIEW_DESC{
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BufferLocation: cb.GetGPUVirtualAddress(),
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SizeInBytes: bufferSize,
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}, h)
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m, err = cb.Map(0, &_D3D12_RANGE{0, 0})
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if err != nil {
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return err
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}
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p.constantBufferMaps[frameIndex][idx] = m
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}
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if m == 0 {
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return fmt.Errorf("directx: ID3D12Resource::Map failed")
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}
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h, err := p.shaderDescriptorHeap.GetCPUDescriptorHandleForHeapStart()
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if err != nil {
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return err
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}
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offset := int32(numConstantBufferAndSourceTextures * (frameIndex*numDescriptorsPerFrame + idx))
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h.Offset(offset, p.shaderDescriptorSize)
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for _, src := range srcs {
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h.Offset(1, p.shaderDescriptorSize)
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if src == nil {
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continue
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}
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device.CreateShaderResourceView(src.resource(), &_D3D12_SHADER_RESOURCE_VIEW_DESC{
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Format: _DXGI_FORMAT_R8G8B8A8_UNORM,
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ViewDimension: _D3D12_SRV_DIMENSION_TEXTURE2D,
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Shader4ComponentMapping: _D3D12_DEFAULT_SHADER_4_COMPONENT_MAPPING,
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Texture2D: _D3D12_TEX2D_SRV{
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MipLevels: 1, // TODO: Can this be 0?
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},
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}, h)
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}
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// Update the constant buffer.
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copyFloat32s(m, uniforms)
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commandList.SetPipelineState(pipelineState)
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rs, err := p.ensureRootSignature(device)
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if err != nil {
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return err
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}
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commandList.SetGraphicsRootSignature(rs)
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commandList.SetDescriptorHeaps([]*_ID3D12DescriptorHeap{
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p.shaderDescriptorHeap,
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p.samplerDescriptorHeap,
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})
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// Match the indices with rootParams in graphicsPipelineState.
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gh, err := p.shaderDescriptorHeap.GetGPUDescriptorHandleForHeapStart()
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if err != nil {
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return err
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}
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gh.Offset(offset, p.shaderDescriptorSize)
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commandList.SetGraphicsRootDescriptorTable(0, gh)
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commandList.SetGraphicsRootDescriptorTable(1, gh)
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sh, err := p.samplerDescriptorHeap.GetGPUDescriptorHandleForHeapStart()
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if err != nil {
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return err
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}
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commandList.SetGraphicsRootDescriptorTable(2, sh)
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return nil
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}
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func (p *pipelineStates) ensureRootSignature(device *_ID3D12Device) (rootSignature *_ID3D12RootSignature, ferr error) {
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if p.rootSignature != nil {
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return p.rootSignature, nil
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}
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cbv := _D3D12_DESCRIPTOR_RANGE{
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RangeType: _D3D12_DESCRIPTOR_RANGE_TYPE_CBV, // b0
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NumDescriptors: 1,
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BaseShaderRegister: 0,
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RegisterSpace: 0,
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OffsetInDescriptorsFromTableStart: 0,
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}
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srv := _D3D12_DESCRIPTOR_RANGE{
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RangeType: _D3D12_DESCRIPTOR_RANGE_TYPE_SRV, // t0
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NumDescriptors: graphics.ShaderImageCount,
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BaseShaderRegister: 0,
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RegisterSpace: 0,
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OffsetInDescriptorsFromTableStart: 1,
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}
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sampler := _D3D12_DESCRIPTOR_RANGE{
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RangeType: _D3D12_DESCRIPTOR_RANGE_TYPE_SAMPLER, // s0
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NumDescriptors: 1,
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BaseShaderRegister: 0,
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RegisterSpace: 0,
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OffsetInDescriptorsFromTableStart: 0,
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}
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rootParams := [...]_D3D12_ROOT_PARAMETER{
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{
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ParameterType: _D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE,
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DescriptorTable: _D3D12_ROOT_DESCRIPTOR_TABLE{
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NumDescriptorRanges: 1,
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pDescriptorRanges: &cbv,
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},
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ShaderVisibility: _D3D12_SHADER_VISIBILITY_ALL,
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},
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{
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ParameterType: _D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE,
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DescriptorTable: _D3D12_ROOT_DESCRIPTOR_TABLE{
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NumDescriptorRanges: 1,
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pDescriptorRanges: &srv,
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},
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ShaderVisibility: _D3D12_SHADER_VISIBILITY_PIXEL,
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},
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{
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ParameterType: _D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE,
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DescriptorTable: _D3D12_ROOT_DESCRIPTOR_TABLE{
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NumDescriptorRanges: 1,
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pDescriptorRanges: &sampler,
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},
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ShaderVisibility: _D3D12_SHADER_VISIBILITY_PIXEL,
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},
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}
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// Create a root signature.
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sig, err := _D3D12SerializeRootSignature(&_D3D12_ROOT_SIGNATURE_DESC{
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NumParameters: uint32(len(rootParams)),
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pParameters: &rootParams[0],
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NumStaticSamplers: 0,
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pStaticSamplers: nil,
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Flags: _D3D12_ROOT_SIGNATURE_FLAG_ALLOW_INPUT_ASSEMBLER_INPUT_LAYOUT,
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}, _D3D_ROOT_SIGNATURE_VERSION_1_0)
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if err != nil {
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return nil, err
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}
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defer sig.Release()
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rs, err := device.CreateRootSignature(0, sig.GetBufferPointer(), sig.GetBufferSize())
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if err != nil {
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return nil, err
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}
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defer func() {
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if ferr != nil {
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rootSignature.Release()
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}
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}()
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p.rootSignature = rs
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return p.rootSignature, nil
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}
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func newShader(source []byte, defs []_D3D_SHADER_MACRO) (vsh, psh *_ID3DBlob, ferr error) {
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var flag uint32 = uint32(_D3DCOMPILE_OPTIMIZATION_LEVEL3)
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// Create a shader
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v, err := _D3DCompile(source, "shader", defs, nil, "VSMain", "vs_5_0", flag, 0)
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if err != nil {
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return nil, nil, fmt.Errorf("directx: D3DCompile for VSMain failed, original source: %s, %w", string(source), err)
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}
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defer func() {
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if ferr != nil {
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v.Release()
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}
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}()
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p, err := _D3DCompile(source, "shader", defs, nil, "PSMain", "ps_5_0", flag, 0)
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if err != nil {
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return nil, nil, fmt.Errorf("directx: D3DCompile for PSMain failed, original source: %s, %w", string(source), err)
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}
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defer func() {
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if ferr != nil {
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p.Release()
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}
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}()
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return v, p, nil
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}
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func (p *pipelineStates) newPipelineState(device *_ID3D12Device, vsh, psh *_ID3DBlob, blend graphicsdriver.Blend, stencilMode stencilMode, screen bool) (state *_ID3D12PipelineState, ferr error) {
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rootSignature, err := p.ensureRootSignature(device)
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if err != nil {
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return nil, err
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}
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defer func() {
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if ferr != nil {
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rootSignature.Release()
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}
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}()
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depthStencilDesc := _D3D12_DEPTH_STENCIL_DESC{
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DepthEnable: 0,
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DepthWriteMask: _D3D12_DEPTH_WRITE_MASK_ALL,
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DepthFunc: _D3D12_COMPARISON_FUNC_LESS,
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StencilEnable: 0,
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StencilReadMask: _D3D12_DEFAULT_STENCIL_READ_MASK,
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StencilWriteMask: _D3D12_DEFAULT_STENCIL_WRITE_MASK,
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FrontFace: _D3D12_DEPTH_STENCILOP_DESC{
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StencilFailOp: _D3D12_STENCIL_OP_KEEP,
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StencilDepthFailOp: _D3D12_STENCIL_OP_KEEP,
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StencilPassOp: _D3D12_STENCIL_OP_KEEP,
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StencilFunc: _D3D12_COMPARISON_FUNC_ALWAYS,
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},
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BackFace: _D3D12_DEPTH_STENCILOP_DESC{
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StencilFailOp: _D3D12_STENCIL_OP_KEEP,
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StencilDepthFailOp: _D3D12_STENCIL_OP_KEEP,
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StencilPassOp: _D3D12_STENCIL_OP_KEEP,
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StencilFunc: _D3D12_COMPARISON_FUNC_ALWAYS,
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},
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}
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writeMask := uint8(_D3D12_COLOR_WRITE_ENABLE_ALL)
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switch stencilMode {
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case prepareStencil:
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depthStencilDesc.StencilEnable = 1
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depthStencilDesc.FrontFace.StencilPassOp = _D3D12_STENCIL_OP_INVERT
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depthStencilDesc.BackFace.StencilPassOp = _D3D12_STENCIL_OP_INVERT
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writeMask = 0
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case drawWithStencil:
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depthStencilDesc.StencilEnable = 1
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depthStencilDesc.FrontFace.StencilFunc = _D3D12_COMPARISON_FUNC_NOT_EQUAL
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depthStencilDesc.BackFace.StencilFunc = _D3D12_COMPARISON_FUNC_NOT_EQUAL
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}
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rtvFormat := _DXGI_FORMAT_R8G8B8A8_UNORM
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if screen {
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rtvFormat = _DXGI_FORMAT_B8G8R8A8_UNORM
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}
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dsvFormat := _DXGI_FORMAT_UNKNOWN
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if stencilMode != noStencil {
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dsvFormat = _DXGI_FORMAT_D24_UNORM_S8_UINT
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}
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// Create a pipeline state.
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psoDesc := _D3D12_GRAPHICS_PIPELINE_STATE_DESC{
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pRootSignature: rootSignature,
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VS: _D3D12_SHADER_BYTECODE{
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pShaderBytecode: vsh.GetBufferPointer(),
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BytecodeLength: vsh.GetBufferSize(),
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},
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PS: _D3D12_SHADER_BYTECODE{
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pShaderBytecode: psh.GetBufferPointer(),
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BytecodeLength: psh.GetBufferSize(),
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},
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BlendState: _D3D12_BLEND_DESC{
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AlphaToCoverageEnable: 0,
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IndependentBlendEnable: 0,
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RenderTarget: [8]_D3D12_RENDER_TARGET_BLEND_DESC{
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{
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BlendEnable: 1,
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LogicOpEnable: 0,
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SrcBlend: blendFactorToBlend(blend.BlendFactorSourceRGB, false),
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DestBlend: blendFactorToBlend(blend.BlendFactorDestinationRGB, false),
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BlendOp: blendOperationToBlendOp(blend.BlendOperationRGB),
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SrcBlendAlpha: blendFactorToBlend(blend.BlendFactorSourceAlpha, true),
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DestBlendAlpha: blendFactorToBlend(blend.BlendFactorDestinationAlpha, true),
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BlendOpAlpha: blendOperationToBlendOp(blend.BlendOperationAlpha),
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LogicOp: _D3D12_LOGIC_OP_NOOP,
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RenderTargetWriteMask: writeMask,
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},
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},
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},
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SampleMask: math.MaxUint32,
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RasterizerState: _D3D12_RASTERIZER_DESC{
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FillMode: _D3D12_FILL_MODE_SOLID,
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|
CullMode: _D3D12_CULL_MODE_NONE,
|
|
FrontCounterClockwise: 0,
|
|
DepthBias: _D3D12_DEFAULT_DEPTH_BIAS,
|
|
DepthBiasClamp: _D3D12_DEFAULT_DEPTH_BIAS_CLAMP,
|
|
SlopeScaledDepthBias: _D3D12_DEFAULT_SLOPE_SCALED_DEPTH_BIAS,
|
|
DepthClipEnable: 0,
|
|
MultisampleEnable: 0,
|
|
AntialiasedLineEnable: 0,
|
|
ForcedSampleCount: 0,
|
|
ConservativeRaster: _D3D12_CONSERVATIVE_RASTERIZATION_MODE_OFF,
|
|
},
|
|
DepthStencilState: depthStencilDesc,
|
|
InputLayout: _D3D12_INPUT_LAYOUT_DESC{
|
|
pInputElementDescs: &inputElementDescs[0],
|
|
NumElements: uint32(len(inputElementDescs)),
|
|
},
|
|
PrimitiveTopologyType: _D3D12_PRIMITIVE_TOPOLOGY_TYPE_TRIANGLE,
|
|
NumRenderTargets: 1,
|
|
RTVFormats: [8]_DXGI_FORMAT{
|
|
rtvFormat,
|
|
},
|
|
DSVFormat: dsvFormat,
|
|
SampleDesc: _DXGI_SAMPLE_DESC{
|
|
Count: 1,
|
|
Quality: 0,
|
|
},
|
|
}
|
|
|
|
s, err := device.CreateGraphicsPipelineState(&psoDesc)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return s, nil
|
|
}
|
|
|
|
func (p *pipelineStates) releaseConstantBuffers(frameIndex int) {
|
|
for i := range p.constantBuffers[frameIndex] {
|
|
p.constantBuffers[frameIndex][i].Unmap(0, nil)
|
|
p.constantBuffers[frameIndex][i].Release()
|
|
p.constantBuffers[frameIndex][i] = nil
|
|
p.constantBufferMaps[frameIndex][i] = 0
|
|
}
|
|
p.constantBuffers[frameIndex] = p.constantBuffers[frameIndex][:0]
|
|
p.constantBufferMaps[frameIndex] = p.constantBufferMaps[frameIndex][:0]
|
|
}
|
|
|
|
func (p *pipelineStates) resetConstantBuffers(frameIndex int) {
|
|
p.constantBuffers[frameIndex] = p.constantBuffers[frameIndex][:0]
|
|
p.constantBufferMaps[frameIndex] = p.constantBufferMaps[frameIndex][:0]
|
|
}
|