/
dx11.hpp
260 lines (224 loc) · 5.85 KB
/
dx11.hpp
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#pragma once
#include <dxgi.h>
#include <d3d11.h>
#include <d3dcompiler.h>
#include <DirectXMath.h>
#include <wincodec.h>
#pragma comment(lib, "windowscodecs")
#pragma comment(lib, "dxgi")
#pragma comment(lib, "d3d11")
#pragma comment(lib, "d3dcompiler")
class shader_factory
{
public:
shader_factory(com_ptr<ID3D11Device> &dev)
: _dev(dev)
, _flags1(0)
, _flags2(0)
, _defs(nullptr)
, _inc(nullptr)
, _dirty(true)
{
}
~shader_factory()
{
}
hresult create_vertex_shader(ID3D11VertexShader **s, const std::string &target = "", const std::string &entry_point = "", ID3D11ClassLinkage *link = nullptr)
{
compile(entry_point.empty() ? _entry : entry_point, target.empty() ? _target : target);
if (_hr.succeeded())
{
_hr = _dev->CreateVertexShader(_bin->GetBufferPointer(), _bin->GetBufferSize(), link, s);
}
return _hr;
}
hresult create_pixel_shader(ID3D11PixelShader **s, const std::string &target = "", const std::string &entry_point = "", ID3D11ClassLinkage *link = nullptr)
{
compile(entry_point.empty() ? _entry : entry_point, target.empty() ? _target : target);
if (_hr.succeeded())
{
_hr = _dev->CreatePixelShader(_bin->GetBufferPointer(), _bin->GetBufferSize(), link, s);
}
return _hr;
}
hresult create_compute_shader(ID3D11ComputeShader **s, const std::string &target = "", const std::string &entry_point = "", ID3D11ClassLinkage *link = nullptr)
{
compile(entry_point.empty() ? _entry : entry_point, target.empty() ? _target : target);
if (_hr.succeeded())
{
_hr = _dev->CreateComputeShader(_bin->GetBufferPointer(), _bin->GetBufferSize(), link, s);
}
return _hr;
}
hresult create_geometry_shader(ID3D11GeometryShader **s, const std::string &target = "", const std::string &entry_point = "", ID3D11ClassLinkage *link = nullptr)
{
compile(entry_point.empty() ? _entry : entry_point, target.empty() ? _target : target);
if (_hr.succeeded())
{
_hr = _dev->CreateGeometryShader(_bin->GetBufferPointer(), _bin->GetBufferSize(), link, s);
}
return _hr;
}
hresult create_input_layout(const D3D11_INPUT_ELEMENT_DESC *desc, UINT count, ID3D11InputLayout **layout)
{
if (_bin)
{
_hr = _dev->CreateInputLayout(desc, count, _bin->GetBufferPointer(), _bin->GetBufferSize(), layout);
}
return _hr;
}
void set_source(const std::string &src)
{
_src = src;
_dirty = true;
}
void set_source(std::istream &file)
{
_src = std::string( std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>() );
_dirty = true;
}
void set_flags1(UINT flags)
{
_flags1 = flags;
_dirty = true;
}
void set_flags2(UINT flags)
{
_flags2 = flags;
_dirty = true;
}
UINT flags1() const
{
return _flags1;
}
UINT flags2() const
{
return _flags2;
}
UINT &flags1()
{
_dirty = true;
return _flags1;
}
UINT &flags2()
{
_dirty = true;
return _flags2;
}
void set_entry_point(const std::string &entry)
{
_entry = entry;
_dirty = true;
}
void set_target(const std::string &target)
{
_target = target;
_dirty = true;
}
void set_defines(const D3D_SHADER_MACRO *defs)
{
_defs = defs;
_dirty = true;
}
void set_includes(ID3DInclude *inc)
{
_inc = inc;
_dirty = true;
}
private:
void compile(const std::string &entry, const std::string &target)
{
if (_src.empty()) return;
if (entry != _entry || target != _target) _dirty = true;
if (!_dirty) return;
_bin = nullptr;
_msg = nullptr;
_hr = D3DCompile(&_src[0], _src.size(), nullptr, _defs, _inc, entry.c_str(), target.c_str(), _flags1, _flags2, &_bin, &_msg);
_dirty = false;
}
private:
com_ptr<ID3D11Device> &_dev;
std::string _src;
UINT _flags1;
UINT _flags2;
std::string _entry;
std::string _target;
const D3D_SHADER_MACRO *_defs;
ID3DInclude *_inc;
com_ptr<ID3DBlob> _bin;
com_ptr<ID3DBlob> _msg;
hresult _hr;
bool _dirty;
};
#include <codecvt>
class texture_helper
{
public:
static hresult create_shader_resource(ID3D11Device *dev, const std::string &filename, ID3D11ShaderResourceView **view)
{
//dev->CreateTexture2D()
///dev->CreateShaderResourceView()
auto &f = factory();
std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> cvt;
auto wpath = cvt.from_bytes(filename);
com_ptr<IWICBitmapDecoder> decoder;
hresult hr = f->CreateDecoderFromFilename(wpath.c_str()
, nullptr
, GENERIC_READ
, WICDecodeMetadataCacheOnDemand
, &decoder);
if (hr)
{
com_ptr<IWICBitmapFrameDecode> frame;
hr = decoder->GetFrame(0, &frame);
if (hr)
{
UINT width, height;
hr = frame->GetSize(&width, &height);
com_ptr<IWICFormatConverter> fmt_cvt;
hr = f->CreateFormatConverter(&fmt_cvt);
hr = fmt_cvt->Initialize(frame
, GUID_WICPixelFormat32bppPBGRA
, WICBitmapDitherTypeNone
, nullptr
, 0.0f
, WICBitmapPaletteTypeCustom);
com_ptr<ID3D11Texture2D> tex;
D3D11_TEXTURE2D_DESC desc = {};
desc.BindFlags = D3D11_BIND_SHADER_RESOURCE;
desc.ArraySize = 1;
desc.Width = width;
desc.Height = height;
desc.SampleDesc.Count = 1;
desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
desc.Usage = D3D11_USAGE_DYNAMIC;
desc.CPUAccessFlags = D3D11_CPU_ACCESS_WRITE;
desc.MipLevels = 1;
hr = dev->CreateTexture2D(&desc, nullptr, &tex);
com_ptr<ID3D11DeviceContext> ctx;
dev->GetImmediateContext(&ctx);
D3D11_MAPPED_SUBRESOURCE res = {};
hr = ctx->Map(tex, 0, D3D11_MAP_WRITE_DISCARD, 0, &res);
hr = fmt_cvt->CopyPixels(nullptr, res.RowPitch, res.DepthPitch, (BYTE *)res.pData);
ctx->Unmap(tex, 0);
hr = dev->CreateShaderResourceView(tex, nullptr, view);
}
}
return hr;
}
static com_ptr<IWICImagingFactory> &factory()
{
if (!_factory)
{
CoInitialize(nullptr);
hresult hr = CoCreateInstance(CLSID_WICImagingFactory
, nullptr
, CLSCTX_INPROC_SERVER
, __uuidof(IWICImagingFactory)
, (PVOID *)&_factory);
}
return _factory;
}
private:
static com_ptr<IWICImagingFactory> _factory;
};