Cool_Tools/imgui
1
0
Fork 0
mirror of https://github.com/ocornut/imgui.git synced 2025-02-02 12:37:20 +01:00
Code Releases Wiki Activity

Backends: DirectX10: Expose selected render state in ImGui_ImplDX10_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks. (#6969, #5834, #7468, #3590)

Browse Source 
Amend e94f95d
This commit is contained in:
ocornut 2025-01-06 18:28:01 +01:00
parent af271e7330
commit f04d3cbdaa
4 changed files with 46 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
backends/imgui_impl_dx10.cpp
View File

@ -15,6 +15,7 @@
// CHANGELOG
// (minor and older changes stripped away, please see git history for details)
// 2025-01-06: DirectX10: Expose selected render state in ImGui_ImplDX10_RenderState, which you can access in 'void* platform_io.Renderer_RenderState' during draw callbacks.
// 2024-10-07: DirectX10: Changed default texture sampler to Clamp instead of Repeat/Wrap.
// 2022-10-11: Using 'nullptr' instead of 'NULL' as per our switch to C++11.
// 2021-06-29: Reorganized backend to pull data from a single structure to facilitate usage with multiple-contexts (all g_XXXX access changed to bd->XXXX).
@ -95,7 +96,28 @@ static void ImGui_ImplDX10_SetupRenderState(ImDrawData* draw_data, ID3D10Device*
vp.TopLeftX = vp.TopLeftY = 0;
device->RSSetViewports(1, &vp);
// Bind shader and vertex buffers
// Setup orthographic projection matrix into our constant buffer
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
void* mapped_resource;
if (bd->pVertexConstantBuffer->Map(D3D10_MAP_WRITE_DISCARD, 0, &mapped_resource) == S_OK)
{
VERTEX_CONSTANT_BUFFER_DX10* constant_buffer = (VERTEX_CONSTANT_BUFFER_DX10*)mapped_resource;
float L = draw_data->DisplayPos.x;
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
float T = draw_data->DisplayPos.y;
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
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));
bd->pVertexConstantBuffer->Unmap();
}
// Setup shader and vertex buffers
unsigned int stride = sizeof(ImDrawVert);
unsigned int offset = 0;
device->IASetInputLayout(bd->pInputLayout);
@ -171,28 +193,6 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
bd->pVB->Unmap();
bd->pIB->Unmap();
// Setup orthographic projection matrix into our constant buffer
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right). DisplayPos is (0,0) for single viewport apps.
{
void* mapped_resource;
if (bd->pVertexConstantBuffer->Map(D3D10_MAP_WRITE_DISCARD, 0, &mapped_resource) != S_OK)
return;
VERTEX_CONSTANT_BUFFER_DX10* constant_buffer = (VERTEX_CONSTANT_BUFFER_DX10*)mapped_resource;
float L = draw_data->DisplayPos.x;
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
float T = draw_data->DisplayPos.y;
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
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));
bd->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
{
@ -236,6 +236,13 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
// Setup desired DX state
ImGui_ImplDX10_SetupRenderState(draw_data, device);
// Setup render state structure (for callbacks and custom texture bindings)
ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO();
ImGui_ImplDX10_RenderState render_state;
render_state.Device = bd->pd3dDevice;
render_state.SamplerDefault = bd->pFontSampler;
render_state.VertexConstantBuffer = bd->pVertexConstantBuffer;
platform_io.Renderer_RenderState = &render_state;
// Render command lists
// (Because we merged all buffers into a single one, we maintain our own offset into them)
@ -248,7 +255,7 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
for (int cmd_i = 0; cmd_i < draw_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &draw_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback)
if (pcmd->UserCallback != nullptr)
{
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
@ -278,6 +285,7 @@ void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data)
global_idx_offset += draw_list->IdxBuffer.Size;
global_vtx_offset += draw_list->VtxBuffer.Size;
}
platform_io.Renderer_RenderState = nullptr;
// Restore modified DX state
device->RSSetScissorRects(old.ScissorRectsCount, old.ScissorRects);

12
backends/imgui_impl_dx10.h
View File

@ -18,6 +18,8 @@
#ifndef IMGUI_DISABLE
struct ID3D10Device;
struct ID3D10SamplerState;
struct ID3D10Buffer;
// Follow "Getting Started" link and check examples/ folder to learn about using backends!
IMGUI_IMPL_API bool ImGui_ImplDX10_Init(ID3D10Device* device);
@ -29,4 +31,14 @@ IMGUI_IMPL_API void ImGui_ImplDX10_RenderDrawData(ImDrawData* draw_data);
IMGUI_IMPL_API bool ImGui_ImplDX10_CreateDeviceObjects();
IMGUI_IMPL_API void ImGui_ImplDX10_InvalidateDeviceObjects();
// [BETA] Selected render state data shared with callbacks.
// This is temporarily stored in GetPlatformIO().Renderer_RenderState during the ImGui_ImplDX10_RenderDrawData() call.
// (Please open an issue if you feel you need access to more data)
struct ImGui_ImplDX10_RenderState
{
ID3D10Device* Device;
ID3D10SamplerState* SamplerDefault;
ID3D10Buffer* VertexConstantBuffer;
};
#endif // #ifndef IMGUI_DISABLE

2
backends/imgui_impl_dx11.cpp
View File

@ -136,7 +136,7 @@ static void ImGui_ImplDX11_SetupRenderState(ImDrawData* draw_data, ID3D11DeviceC
device_ctx->DSSetShader(nullptr, nullptr, 0); // In theory we should backup and restore this as well.. very infrequently used..
device_ctx->CSSetShader(nullptr, nullptr, 0); // In theory we should backup and restore this as well.. very infrequently used..
// Setup blend state
// Setup render state
const float blend_factor[4] = { 0.f, 0.f, 0.f, 0.f };
device_ctx->OMSetBlendState(bd->pBlendState, blend_factor, 0xffffffff);
device_ctx->OMSetDepthStencilState(bd->pDepthStencilState, 0);

1
docs/CHANGELOG.txt
View File

@ -74,6 +74,7 @@ Other changes:
primarily for the purpose of making our examples simpler.
- Backends: DX11: Expose vertex constant buffer in ImGui_ImplDX11_RenderState.
Reset projection matrix in ImDrawCallback_ResetRenderState handlers. (#6969, #5834, #7468, #3590)
- Backends: DX10: Expose ImGui_ImplDX10_RenderState for completeness. (#6969, #5834, #7468, #3590)
- Examples: Added Win32+Vulkan example for completeness. (#8180) [@jristic]