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Check compute shaders compat #948

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Spodi wants to merge 4 commits into from
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Check compute shaders compat #948

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d59bf37
Fix DEVICE_DRAW_RESOURCE_SAMPLE_COUNT_MISMATCH
Spodi Oct 25, 2025
07bd0fb
add ThrowWithMessage
Spodi Oct 25, 2025
faddc32
check GPU for ComputeShader support
Spodi Oct 25, 2025
8eb3130
clang-format
Spodi Oct 25, 2025
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1 change: 1 addition & 0 deletions include/fast/backends/gfx_dxgi.h
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Original file line number Diff line number Diff line change
Expand Up @@ -116,6 +116,7 @@ class GfxWindowBackendDXGI final : public GfxWindowBackend {
#ifdef DECLARE_GFX_DXGI_FUNCTIONS
void ThrowIfFailed(HRESULT res);
void ThrowIfFailed(HRESULT res, HWND h_wnd, const char* message);
void ThrowWithMessage(HWND h_wnd, const char* message);
#endif

#endif
9 changes: 8 additions & 1 deletion src/fast/backends/gfx_direct3d11.cpp
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Expand Up @@ -221,6 +221,13 @@ void GfxRenderingAPIDX11::Init() {
mWindowBackend->GetWindowHandle(), "Failed to create per-draw constant buffer.");

// Create compute shader that can be used to retrieve depth buffer values
D3D11_FEATURE_DATA_D3D10_X_HARDWARE_OPTIONS features;
mDevice->CheckFeatureSupport(D3D11_FEATURE_D3D10_X_HARDWARE_OPTIONS, &features,
sizeof(D3D11_FEATURE_DATA_D3D10_X_HARDWARE_OPTIONS));
if (features.ComputeShaders_Plus_RawAndStructuredBuffers_Via_Shader_4_x == false) {
ThrowWithMessage(mWindowBackend->GetWindowHandle(),
"D3D device doesn't support compute shaders 4.0 or greater.");
}

const char* shader_source = R"(
sampler my_sampler : register(s0);
Expand All @@ -236,7 +243,7 @@ void CSMain(uint3 DTid : SV_DispatchThreadID) {

const char* shader_source_msaa = R"(
sampler my_sampler : register(s0);
Texture2DMS<float, 2> tex : register(t0);
Texture2DMS<float> tex : register(t0);
StructuredBuffer<int2> coord : register(t1);
RWStructuredBuffer<float> output : register(u0);

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6 changes: 6 additions & 0 deletions src/fast/backends/gfx_dxgi.cpp
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Expand Up @@ -1089,5 +1089,11 @@ void ThrowIfFailed(HRESULT res, HWND h_wnd, const char* message) {
throw res;
}
}
void ThrowWithMessage(HWND h_wnd, const char* message) {
char full_message[256];
sprintf(full_message, message);
MessageBoxA(h_wnd, full_message, "Error", MB_OK | MB_ICONERROR);
throw;
}

#endif
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