Void CImplDirectXStatesBlend::Activate()
{
Float32 BlendFactor[4];
BlendFactor[0] = 1.0f;
BlendFactor[1] = 1.0f;
BlendFactor[2] = 1.0f;
BlendFactor[3] = 1.0f;
ID3D10Device* device = CImplDirectXGraphicsManagerHelper::GetDevice();
DebugAssert( m_State );
device->OMSetBlendState ( m_State, BlendFactor, 0xffffffff );
}
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
// If text or lines are blurry when integrating ImGui in your engine:
// - in your Render function, try translating your projection matrix by (0.5f,0.5f) or (0.375f,0.375f)
void ImGui_ImplDX10_RenderDrawLists(ImDrawData* draw_data)
{
ID3D10Device* ctx = g_pd3dDevice;
// Create and grow vertex/index buffers if needed
if (!g_pVB || g_VertexBufferSize < draw_data->TotalVtxCount)
{
if (g_pVB) { g_pVB->Release(); g_pVB = NULL; }
g_VertexBufferSize = draw_data->TotalVtxCount + 5000;
D3D10_BUFFER_DESC desc;
memset(&desc, 0, sizeof(D3D10_BUFFER_DESC));
desc.Usage = D3D10_USAGE_DYNAMIC;
desc.ByteWidth = g_VertexBufferSize * sizeof(ImDrawVert);
desc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
desc.MiscFlags = 0;
if (ctx->CreateBuffer(&desc, NULL, &g_pVB) < 0)
return;
}
if (!g_pIB || g_IndexBufferSize < draw_data->TotalIdxCount)
{
if (g_pIB) { g_pIB->Release(); g_pIB = NULL; }
g_IndexBufferSize = draw_data->TotalIdxCount + 10000;
D3D10_BUFFER_DESC desc;
memset(&desc, 0, sizeof(D3D10_BUFFER_DESC));
desc.Usage = D3D10_USAGE_DYNAMIC;
desc.ByteWidth = g_IndexBufferSize * sizeof(ImDrawIdx);
desc.BindFlags = D3D10_BIND_INDEX_BUFFER;
desc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
if (ctx->CreateBuffer(&desc, NULL, &g_pIB) < 0)
return;
}
// Copy and convert all vertices into a single contiguous buffer
ImDrawVert* vtx_dst = NULL;
ImDrawIdx* idx_dst = NULL;
g_pVB->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**)&vtx_dst);
g_pIB->Map(D3D10_MAP_WRITE_DISCARD, 0, (void**)&idx_dst);
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
memcpy(vtx_dst, &cmd_list->VtxBuffer[0], cmd_list->VtxBuffer.size() * sizeof(ImDrawVert));
memcpy(idx_dst, &cmd_list->IdxBuffer[0], cmd_list->IdxBuffer.size() * sizeof(ImDrawIdx));
vtx_dst += cmd_list->VtxBuffer.size();
idx_dst += cmd_list->IdxBuffer.size();
}
g_pVB->Unmap();
g_pIB->Unmap();
// Setup orthographic projection matrix into our constant buffer
{
void* mapped_resource;
if (g_pVertexConstantBuffer->Map(D3D10_MAP_WRITE_DISCARD, 0, &mapped_resource) != S_OK)
return;
VERTEX_CONSTANT_BUFFER* constant_buffer = (VERTEX_CONSTANT_BUFFER*)mapped_resource;
const float L = 0.0f;
const float R = ImGui::GetIO().DisplaySize.x;
const float B = ImGui::GetIO().DisplaySize.y;
const float T = 0.0f;
const float mvp[4][4] =
{
{ 2.0f/(R-L), 0.0f, 0.0f, 0.0f },
{ 0.0f, 2.0f/(T-B), 0.0f, 0.0f },
{ 0.0f, 0.0f, 0.5f, 0.0f },
{ (R+L)/(L-R), (T+B)/(B-T), 0.5f, 1.0f },
};
memcpy(&constant_buffer->mvp, mvp, sizeof(mvp));
g_pVertexConstantBuffer->Unmap();
}
// Backup DX state that will be modified to restore it afterwards (unfortunately this is very ugly looking and verbose. Close your eyes!)
struct BACKUP_DX10_STATE
{
UINT ScissorRectsCount, ViewportsCount;
D3D10_RECT ScissorRects[D3D10_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
D3D10_VIEWPORT Viewports[D3D10_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE];
ID3D10RasterizerState* RS;
ID3D10BlendState* BlendState;
FLOAT BlendFactor[4];
UINT SampleMask;
UINT StencilRef;
ID3D10DepthStencilState* DepthStencilState;
ID3D10ShaderResourceView* PSShaderResource;
ID3D10SamplerState* PSSampler;
ID3D10PixelShader* PS;
ID3D10VertexShader* VS;
D3D10_PRIMITIVE_TOPOLOGY PrimitiveTopology;
ID3D10Buffer* IndexBuffer, *VertexBuffer, *VSConstantBuffer;
UINT IndexBufferOffset, VertexBufferStride, VertexBufferOffset;
DXGI_FORMAT IndexBufferFormat;
ID3D10InputLayout* InputLayout;
};
BACKUP_DX10_STATE old;
old.ScissorRectsCount = old.ViewportsCount = D3D10_VIEWPORT_AND_SCISSORRECT_OBJECT_COUNT_PER_PIPELINE;
ctx->RSGetScissorRects(&old.ScissorRectsCount, old.ScissorRects);
ctx->RSGetViewports(&old.ViewportsCount, old.Viewports);
ctx->RSGetState(&old.RS);
ctx->OMGetBlendState(&old.BlendState, old.BlendFactor, &old.SampleMask);
ctx->OMGetDepthStencilState(&old.DepthStencilState, &old.StencilRef);
ctx->PSGetShaderResources(0, 1, &old.PSShaderResource);
ctx->PSGetSamplers(0, 1, &old.PSSampler);
ctx->PSGetShader(&old.PS);
ctx->VSGetShader(&old.VS);
ctx->VSGetConstantBuffers(0, 1, &old.VSConstantBuffer);
ctx->IAGetPrimitiveTopology(&old.PrimitiveTopology);
ctx->IAGetIndexBuffer(&old.IndexBuffer, &old.IndexBufferFormat, &old.IndexBufferOffset);
ctx->IAGetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset);
ctx->IAGetInputLayout(&old.InputLayout);
// Setup viewport
D3D10_VIEWPORT vp;
memset(&vp, 0, sizeof(D3D10_VIEWPORT));
vp.Width = (UINT)ImGui::GetIO().DisplaySize.x;
vp.Height = (UINT)ImGui::GetIO().DisplaySize.y;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = vp.TopLeftY = 0;
ctx->RSSetViewports(1, &vp);
// Bind shader and vertex buffers
unsigned int stride = sizeof(ImDrawVert);
unsigned int offset = 0;
ctx->IASetInputLayout(g_pInputLayout);
ctx->IASetVertexBuffers(0, 1, &g_pVB, &stride, &offset);
ctx->IASetIndexBuffer(g_pIB, sizeof(ImDrawIdx) == 2 ? DXGI_FORMAT_R16_UINT : DXGI_FORMAT_R32_UINT, 0);
ctx->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
ctx->VSSetShader(g_pVertexShader);
ctx->VSSetConstantBuffers(0, 1, &g_pVertexConstantBuffer);
ctx->PSSetShader(g_pPixelShader);
ctx->PSSetSamplers(0, 1, &g_pFontSampler);
// Setup render state
const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
ctx->OMSetBlendState(g_pBlendState, blend_factor, 0xffffffff);
ctx->OMSetDepthStencilState(g_pDepthStencilState, 0);
ctx->RSSetState(g_pRasterizerState);
// Render command lists
int vtx_offset = 0;
int idx_offset = 0;
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback)
{
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
const D3D10_RECT r = { (LONG)pcmd->ClipRect.x, (LONG)pcmd->ClipRect.y, (LONG)pcmd->ClipRect.z, (LONG)pcmd->ClipRect.w };
ctx->PSSetShaderResources(0, 1, (ID3D10ShaderResourceView**)&pcmd->TextureId);
ctx->RSSetScissorRects(1, &r);
ctx->DrawIndexed(pcmd->ElemCount, idx_offset, vtx_offset);
}
idx_offset += pcmd->ElemCount;
}
vtx_offset += cmd_list->VtxBuffer.size();
}
// Restore modified DX state
ctx->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);
ctx->RSSetViewports(old.ViewportsCount, old.Viewports);
ctx->RSSetState(old.RS); if (old.RS) old.RS->Release();
ctx->OMSetBlendState(old.BlendState, old.BlendFactor, old.SampleMask); if (old.BlendState) old.BlendState->Release();
ctx->OMSetDepthStencilState(old.DepthStencilState, old.StencilRef); if (old.DepthStencilState) old.DepthStencilState->Release();
ctx->PSSetShaderResources(0, 1, &old.PSShaderResource); if (old.PSShaderResource) old.PSShaderResource->Release();
ctx->PSSetSamplers(0, 1, &old.PSSampler); if (old.PSSampler) old.PSSampler->Release();
ctx->PSSetShader(old.PS); if (old.PS) old.PS->Release();
ctx->VSSetShader(old.VS); if (old.VS) old.VS->Release();
ctx->VSSetConstantBuffers(0, 1, &old.VSConstantBuffer); if (old.VSConstantBuffer) old.VSConstantBuffer->Release();
ctx->IASetPrimitiveTopology(old.PrimitiveTopology);
ctx->IASetIndexBuffer(old.IndexBuffer, old.IndexBufferFormat, old.IndexBufferOffset); if (old.IndexBuffer) old.IndexBuffer->Release();
ctx->IASetVertexBuffers(0, 1, &old.VertexBuffer, &old.VertexBufferStride, &old.VertexBufferOffset); if (old.VertexBuffer) old.VertexBuffer->Release();
ctx->IASetInputLayout(old.InputLayout); if (old.InputLayout) old.InputLayout->Release();
}
bool D10State::init() {
static HMODREF(GetModuleHandleW(L"D3D10.DLL"), D3D10CreateEffectFromMemory);
static HMODREF(GetModuleHandleW(L"D3D10.DLL"), D3D10CreateStateBlock);
static HMODREF(GetModuleHandleW(L"D3D10.DLL"), D3D10StateBlockMaskEnableAll);
if (pD3D10CreateEffectFromMemory == NULL
|| pD3D10CreateStateBlock == NULL
|| pD3D10StateBlockMaskEnableAll == NULL) {
ods("D3D10: Could not get handles for all required D3D10 state initialization functions");
return false;
}
HRESULT hr;
D3D10_STATE_BLOCK_MASK StateBlockMask;
ZeroMemory(&StateBlockMask, sizeof(StateBlockMask));
hr = pD3D10StateBlockMaskEnableAll(&StateBlockMask);
if (FAILED(hr)) {
ods("D3D10: D3D10StateBlockMaskEnableAll failed");
return false;
}
hr = pD3D10CreateStateBlock(pDevice, &StateBlockMask, &pOrigStateBlock);
if (FAILED(hr)) {
ods("D3D10: D3D10CreateStateBlock for pOrigStateBlock failed");
return false;
}
hr = pD3D10CreateStateBlock(pDevice, &StateBlockMask, &pMyStateBlock);
if (FAILED(hr)) {
ods("D3D10: D3D10CreateStateBlock for pMyStateBlock failed");
return false;
}
hr = pOrigStateBlock->Capture();
if (FAILED(hr)) {
ods("D3D10: Failed to store original state block during init");
return false;
}
ID3D10Texture2D *pBackBuffer = NULL;
hr = pSwapChain->GetBuffer(0, __uuidof(*pBackBuffer), (LPVOID*)&pBackBuffer);
if (FAILED(hr)) {
ods("D3D10: pSwapChain->GetBuffer failure!");
return false;
}
pDevice->ClearState();
D3D10_TEXTURE2D_DESC backBufferSurfaceDesc;
pBackBuffer->GetDesc(&backBufferSurfaceDesc);
ZeroMemory(&vp, sizeof(vp));
vp.Width = backBufferSurfaceDesc.Width;
vp.Height = backBufferSurfaceDesc.Height;
vp.MinDepth = 0;
vp.MaxDepth = 1;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
pDevice->RSSetViewports(1, &vp);
hr = pDevice->CreateRenderTargetView(pBackBuffer, NULL, &pRTV);
if (FAILED(hr)) {
ods("D3D10: pDevice->CreateRenderTargetView failed!");
return false;
}
pDevice->OMSetRenderTargets(1, &pRTV, NULL);
// Settings for an "over" operation.
// https://en.wikipedia.org/w/index.php?title=Alpha_compositing&oldid=580659153#Description
D3D10_BLEND_DESC blend;
ZeroMemory(&blend, sizeof(blend));
blend.BlendEnable[0] = TRUE;
blend.SrcBlend = D3D10_BLEND_ONE;
blend.DestBlend = D3D10_BLEND_INV_SRC_ALPHA;
blend.BlendOp = D3D10_BLEND_OP_ADD;
blend.SrcBlendAlpha = D3D10_BLEND_ONE;
blend.DestBlendAlpha = D3D10_BLEND_INV_SRC_ALPHA;
blend.BlendOpAlpha = D3D10_BLEND_OP_ADD;
blend.RenderTargetWriteMask[0] = D3D10_COLOR_WRITE_ENABLE_ALL;
hr = pDevice->CreateBlendState(&blend, &pBlendState);
if (FAILED(hr)) {
ods("D3D10: pDevice->CreateBlendState failed!");
return false;
}
pDevice->OMSetBlendState(pBlendState, NULL, 0xffffffff);
hr = pD3D10CreateEffectFromMemory((void *) g_main, sizeof(g_main), 0, pDevice, NULL, &pEffect);
if (FAILED(hr)) {
ods("D3D10: D3D10CreateEffectFromMemory failed!");
return false;
}
pTechnique = pEffect->GetTechniqueByName("Render");
if (pTechnique == NULL) {
ods("D3D10: Could not get technique for name 'Render'");
return false;
}
pDiffuseTexture = pEffect->GetVariableByName("txDiffuse")->AsShaderResource();
if (pDiffuseTexture == NULL) {
ods("D3D10: Could not get variable by name 'txDiffuse'");
return false;
}
pTexture = NULL;
pSRView = NULL;
// Define the input layout
D3D10_INPUT_ELEMENT_DESC layout[] = {
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};
UINT numElements = sizeof(layout) / sizeof(layout[0]);
// Create the input layout
D3D10_PASS_DESC PassDesc;
hr = pTechnique->GetPassByIndex(0)->GetDesc(&PassDesc);
if (FAILED(hr)) {
ods("D3D10: Couldn't get pass description for technique");
return false;
}
hr = pDevice->CreateInputLayout(layout, numElements, PassDesc.pIAInputSignature, PassDesc.IAInputSignatureSize, &pVertexLayout);
if (FAILED(hr)) {
ods("D3D10: pDevice->CreateInputLayout failure!");
return false;
}
pDevice->IASetInputLayout(pVertexLayout);
D3D10_BUFFER_DESC bd;
ZeroMemory(&bd, sizeof(bd));
bd.Usage = D3D10_USAGE_DYNAMIC;
bd.ByteWidth = sizeof(SimpleVertex) * 4;
bd.BindFlags = D3D10_BIND_VERTEX_BUFFER;
bd.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
bd.MiscFlags = 0;
hr = pDevice->CreateBuffer(&bd, NULL, &pVertexBuffer);
if (FAILED(hr)) {
ods("D3D10: pDevice->CreateBuffer failure!");
return false;
}
DWORD indices[] = {
0,1,3,
1,2,3,
};
bd.Usage = D3D10_USAGE_DEFAULT;
bd.ByteWidth = sizeof(DWORD) * 6;
bd.BindFlags = D3D10_BIND_INDEX_BUFFER;
bd.CPUAccessFlags = 0;
bd.MiscFlags = 0;
D3D10_SUBRESOURCE_DATA InitData;
ZeroMemory(&InitData, sizeof(InitData));
InitData.pSysMem = indices;
hr = pDevice->CreateBuffer(&bd, &InitData, &pIndexBuffer);
if (FAILED(hr)) {
ods("D3D10: pDevice->CreateBuffer failure!");
return false;
}
// Set index buffer
pDevice->IASetIndexBuffer(pIndexBuffer, DXGI_FORMAT_R32_UINT, 0);
// Set primitive topology
pDevice->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
hr = pMyStateBlock->Capture();
if (FAILED(hr)) {
ods("D3D10: Failed to capture newly created state block");
return false;
}
hr = pOrigStateBlock->Apply();
if (FAILED(hr)) {
ods("D3D10: Failed to restore original state block during init");
return false;
}
pBackBuffer->Release();
return true;
}
void D10State::init() {
static HMODREF(GetModuleHandleW(L"D3D10.DLL"), D3D10CreateEffectFromMemory);
static HMODREF(GetModuleHandleW(L"D3D10.DLL"), D3D10CreateStateBlock);
static HMODREF(GetModuleHandleW(L"D3D10.DLL"), D3D10StateBlockMaskEnableAll);
HRESULT hr;
dwMyThread = GetCurrentThreadId();
D3D10_STATE_BLOCK_MASK StateBlockMask;
ZeroMemory(&StateBlockMask, sizeof(StateBlockMask));
pD3D10StateBlockMaskEnableAll(&StateBlockMask);
pD3D10CreateStateBlock(pDevice, &StateBlockMask, &pOrigStateBlock);
pD3D10CreateStateBlock(pDevice, &StateBlockMask, &pMyStateBlock);
pOrigStateBlock->Capture();
ID3D10Texture2D* pBackBuffer = NULL;
hr = pSwapChain->GetBuffer(0, __uuidof(*pBackBuffer), (LPVOID*)&pBackBuffer);
pDevice->ClearState();
D3D10_TEXTURE2D_DESC backBufferSurfaceDesc;
pBackBuffer->GetDesc(&backBufferSurfaceDesc);
ZeroMemory(&vp, sizeof(vp));
vp.Width = backBufferSurfaceDesc.Width;
vp.Height = backBufferSurfaceDesc.Height;
vp.MinDepth = 0;
vp.MaxDepth = 1;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
pDevice->RSSetViewports(1, &vp);
hr = pDevice->CreateRenderTargetView(pBackBuffer, NULL, &pRTV);
pDevice->OMSetRenderTargets(1, &pRTV, NULL);
D3D10_BLEND_DESC blend;
ZeroMemory(&blend, sizeof(blend));
blend.BlendEnable[0] = TRUE;
blend.SrcBlend = D3D10_BLEND_ONE;
blend.DestBlend = D3D10_BLEND_INV_SRC_ALPHA;
blend.BlendOp = D3D10_BLEND_OP_ADD;
blend.SrcBlendAlpha = D3D10_BLEND_ONE;
blend.DestBlendAlpha = D3D10_BLEND_INV_SRC_ALPHA;
blend.BlendOpAlpha = D3D10_BLEND_OP_ADD;
blend.RenderTargetWriteMask[0] = D3D10_COLOR_WRITE_ENABLE_ALL;
pDevice->CreateBlendState(&blend, &pBlendState);
float bf[4];
pDevice->OMSetBlendState(pBlendState, bf, 0xffffffff);
pD3D10CreateEffectFromMemory((void *) g_main, sizeof(g_main), 0, pDevice, NULL, &pEffect);
pTechnique = pEffect->GetTechniqueByName("Render");
pDiffuseTexture = pEffect->GetVariableByName("txDiffuse")->AsShaderResource();
pTexture = NULL;
pSRView = NULL;
// Define the input layout
D3D10_INPUT_ELEMENT_DESC layout[] = {
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, 12, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};
UINT numElements = sizeof(layout) / sizeof(layout[0]);
// Create the input layout
D3D10_PASS_DESC PassDesc;
pTechnique->GetPassByIndex(0)->GetDesc(&PassDesc);
hr = pDevice->CreateInputLayout(layout, numElements, PassDesc.pIAInputSignature, PassDesc.IAInputSignatureSize, &pVertexLayout);
pDevice->IASetInputLayout(pVertexLayout);
D3D10_BUFFER_DESC bd;
ZeroMemory(&bd, sizeof(bd));
bd.Usage = D3D10_USAGE_DYNAMIC;
bd.ByteWidth = sizeof(SimpleVertex) * 4;
bd.BindFlags = D3D10_BIND_VERTEX_BUFFER;
bd.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
bd.MiscFlags = 0;
hr = pDevice->CreateBuffer(&bd, NULL, &pVertexBuffer);
DWORD indices[] = {
0,1,3,
1,2,3,
};
bd.Usage = D3D10_USAGE_DEFAULT;
bd.ByteWidth = sizeof(DWORD) * 6;
bd.BindFlags = D3D10_BIND_INDEX_BUFFER;
bd.CPUAccessFlags = 0;
bd.MiscFlags = 0;
D3D10_SUBRESOURCE_DATA InitData;
ZeroMemory(&InitData, sizeof(InitData));
InitData.pSysMem = indices;
hr = pDevice->CreateBuffer(&bd, &InitData, &pIndexBuffer);
// Set index buffer
pDevice->IASetIndexBuffer(pIndexBuffer, DXGI_FORMAT_R32_UINT, 0);
// Set primitive topology
pDevice->IASetPrimitiveTopology(D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
pMyStateBlock->Capture();
pOrigStateBlock->Apply();
pBackBuffer->Release();
dwMyThread = 0;
}
