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Added SDL_HINT_RENDER_DIRECT3D11_WARP

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Fixes https://github.com/libsdl-org/SDL/issues/13002
This commit is contained in:
Sam Lantinga
2025-09-07 11:00:59 -07:00
parent 466f93aee1
commit ec33da05b3
2 changed files with 34 additions and 9 deletions
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17
include/SDL3/SDL_hints.h
View File

@@ -2964,6 +2964,23 @@ extern "C" {
*/
#define SDL_HINT_RENDER_DIRECT3D11_DEBUG "SDL_RENDER_DIRECT3D11_DEBUG"
/**
* A variable controlling whether to use the Direct3D 11 WARP software rasterizer.
*
* For more information, see:
* https://learn.microsoft.com/en-us/windows/win32/direct3darticles/directx-warp
*
* The variable can be set to the following values:
*
* - "0": Disable WARP rasterizer. (default)
* - "1": Enable WARP rasterizer.
*
* This hint should be set before creating a renderer.
*
* \since This hint is available since SDL 3.4.0.
*/
#define SDL_HINT_RENDER_DIRECT3D11_WARP "SDL_RENDER_DIRECT3D11_WARP"
/**
* A variable controlling whether to enable Vulkan Validation Layers.
*

26
src/render/direct3d11/SDL_render_d3d11.c
View File

@@ -154,7 +154,6 @@ typedef struct
SDL_SharedObject *hDXGIMod;
SDL_SharedObject *hD3D11Mod;
IDXGIFactory2 *dxgiFactory;
IDXGIAdapter *dxgiAdapter;
IDXGIDebug *dxgiDebug;
ID3D11Device1 *d3dDevice;
ID3D11DeviceContext1 *d3dContext;
@@ -369,7 +368,6 @@ static void D3D11_ReleaseAll(SDL_Renderer *renderer)
SAFE_RELEASE(data->d3dContext);
SAFE_RELEASE(data->d3dDevice);
SAFE_RELEASE(data->dxgiAdapter);
SAFE_RELEASE(data->dxgiFactory);
data->swapEffect = (DXGI_SWAP_EFFECT)0;
@@ -512,10 +510,12 @@ static HRESULT D3D11_CreateDeviceResources(SDL_Renderer *renderer)
PFN_CREATE_DXGI_FACTORY2 CreateDXGIFactory2Func = NULL;
D3D11_RenderData *data = (D3D11_RenderData *)renderer->internal;
PFN_D3D11_CREATE_DEVICE D3D11CreateDeviceFunc;
IDXGIAdapter *dxgiAdapter = NULL;
ID3D11Device *d3dDevice = NULL;
ID3D11DeviceContext *d3dContext = NULL;
IDXGIDevice1 *dxgiDevice = NULL;
HRESULT result = S_OK;
D3D_DRIVER_TYPE driverType = D3D_DRIVER_TYPE_UNKNOWN;
UINT creationFlags = 0;
bool createDebug;
#ifdef HAVE_DXGI1_5_H
@@ -625,11 +625,18 @@ static HRESULT D3D11_CreateDeviceResources(SDL_Renderer *renderer)
}
#endif // HAVE_DXGI1_5_H
// FIXME: Should we use the default adapter?
result = IDXGIFactory2_EnumAdapters(data->dxgiFactory, 0, &data->dxgiAdapter);
if (FAILED(result)) {
WIN_SetErrorFromHRESULT(SDL_COMPOSE_ERROR("D3D11CreateDevice"), result);
goto done;
if (SDL_GetHintBoolean(SDL_HINT_RENDER_DIRECT3D11_WARP, false)) {
driverType = D3D_DRIVER_TYPE_WARP;
dxgiAdapter = NULL;
} else {
driverType = D3D_DRIVER_TYPE_UNKNOWN;
// FIXME: Should we use the default adapter?
result = IDXGIFactory2_EnumAdapters(data->dxgiFactory, 0, &dxgiAdapter);
if (FAILED(result)) {
WIN_SetErrorFromHRESULT(SDL_COMPOSE_ERROR("EnumAdapters"), result);
goto done;
}
}
/* This flag adds support for surfaces with a different color channel ordering
@@ -649,8 +656,8 @@ static HRESULT D3D11_CreateDeviceResources(SDL_Renderer *renderer)
// Create the Direct3D 11 API device object and a corresponding context.
result = D3D11CreateDeviceFunc(
data->dxgiAdapter,
D3D_DRIVER_TYPE_UNKNOWN,
dxgiAdapter,
driverType,
NULL,
creationFlags, // Set set debug and Direct2D compatibility flags.
featureLevels, // List of feature levels this app can support.
@@ -779,6 +786,7 @@ static HRESULT D3D11_CreateDeviceResources(SDL_Renderer *renderer)
SDL_SetPointerProperty(SDL_GetRendererProperties(renderer), SDL_PROP_RENDERER_D3D11_DEVICE_POINTER, data->d3dDevice);
done:
SAFE_RELEASE(dxgiAdapter);
SAFE_RELEASE(d3dDevice);
SAFE_RELEASE(d3dContext);
SAFE_RELEASE(dxgiDevice);