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dx9: update device size on window size change

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tobid7
2026-09-05 17:18:21 +02:00
parent 8c1063640c
commit a1cb3bf290
2 changed files with 28 additions and 17 deletions
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tests/gfx/source/os/desktopos.cpp
+21 -10
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@@ -18,6 +18,7 @@ struct DesktopOS::Impl {
#if WIN32
IDirect3D9* d3d = nullptr;
IDirect3DDevice9* dx9_device = nullptr;
D3DPRESENT_PARAMETERS d3dpp = {};
#endif
};
@@ -56,17 +57,18 @@ void DesktopOS::Init() {
if (pDriver == Driver::DirectX9) {
impl->d3d = Direct3DCreate9(D3D_SDK_VERSION);
auto hwnd = glfwGetWin32Window(impl->win);
D3DPRESENT_PARAMETERS d3dpp = {};
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.hDeviceWindow = hwnd;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
d3dpp.EnableAutoDepthStencil = TRUE;
d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
impl->d3dpp = D3DPRESENT_PARAMETERS{};
impl->d3dpp.Windowed = TRUE;
impl->d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
impl->d3dpp.hDeviceWindow = hwnd;
impl->d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
impl->d3dpp.EnableAutoDepthStencil = TRUE;
impl->d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
HRESULT hr = impl->d3d->CreateDevice(
D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd,
D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &impl->dx9_device);
D3DCREATE_HARDWARE_VERTEXPROCESSING, &impl->d3dpp, &impl->dx9_device);
if (FAILED(hr)) {
MessageBoxW(nullptr, L"Failed to create D3D9 device", L"Error", MB_OK);
std::abort();
@@ -100,7 +102,15 @@ void DesktopOS::ClearViewPort() {
glViewport(0, 0, pViewPort.x, pViewPort.y);
} else if (pDriver == Driver::DirectX9) {
#ifdef _WIN32
if (impl->dx9_device) {
// Resize the swapchain to match the window size
if (impl->dx9_device && pViewPort.x > 0 && pViewPort.y > 0) {
if (impl->d3dpp.BackBufferWidth != (UINT)pViewPort.x ||
impl->d3dpp.BackBufferHeight != (UINT)pViewPort.y) {
impl->d3dpp.BackBufferWidth = pViewPort.x;
impl->d3dpp.BackBufferHeight = pViewPort.y;
impl->dx9_device->Reset(&impl->d3dpp);
}
impl->dx9_device->Clear(0, nullptr, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
D3DCOLOR_XRGB(25, 25, 25), 1.0f, 0);
impl->dx9_device->BeginScene();
@@ -112,7 +122,8 @@ void DesktopOS::ClearViewPort() {
void DesktopOS::SwapBuffers() {
if (pDriver == Driver::DirectX9) {
#ifdef _WIN32
if (impl->dx9_device) {
// yes we schould use some safetey checks
if (impl->dx9_device && pViewPort.x > 0 && pViewPort.y > 0) {
impl->dx9_device->EndScene();
impl->dx9_device->Present(nullptr, nullptr, nullptr, nullptr);
}