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Cxbx-Reloaded
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Fix black screen in some titles when switching resolutions during gameplay 

This contains a bug fix that can be seen on the MS dashboard (Clipped viewport values were never copied back to HostViewPort)

And one that was a previously unknown behavior (changing backbuffer width/height without a call to SetRenderTarget)
a LOG_TEST_CASE has been added for the new behavior, and a fix has been applied by destroying the existing host render target, and creating a new one.

Known PR Test Cases:
 - MS Dashboard 'Video Mode' settings menu (When switching between 'widescreen', 'letterbox', 'normal')
 - Chihiro Factory Test Program (requires chihiro-work branch)
This commit is contained in:
Luke Usher 2019-07-02 12:33:15 +01:00
parent 952e7870cd
commit eec144e2e2
1 changed files with 20 additions and 2 deletions
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22
src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
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@ -3207,14 +3207,32 @@ VOID WINAPI XTL::EMUPATCH(D3DDevice_SetViewport)
DWORD top = std::max((int)pViewport->Y, 0);
DWORD right = std::min((int)pViewport->X + (int)pViewport->Width, (int)XboxRenderTarget_Width);
DWORD bottom = std::min((int)pViewport->Y + (int)pViewport->Height, (int)XboxRenderTarget_Height);
DWORD width = right - left;
DWORD height = bottom - top;
XboxViewPort.X = left;
XboxViewPort.Y = top;
XboxViewPort.Width = right - left;
XboxViewPort.Height = bottom - top;
XboxViewPort.Width = width;
XboxViewPort.Height = height;
XboxViewPort.MinZ = pViewport->MinZ;
XboxViewPort.MaxZ = pViewport->MaxZ;
// This operation is often used to change the display resolution without calling SetRenderTarget!
// This works by updating the underlying Width & Height of the Xbox surface, without reallocating the data
// Because of this, we need to validate that the associated host resource still matches the dimensions of the Xbox Render Target
// If not, we must force them to be re-created
// TEST CASE: Chihiro Factory Test Program
DWORD HostRenderTarget_Width = 0, HostRenderTarget_Height = 0;
GetHostRenderTargetDimensions(&HostRenderTarget_Width, &HostRenderTarget_Height);
if (HostRenderTarget_Width != XboxRenderTarget_Width || HostRenderTarget_Height != XboxRenderTarget_Height) {
LOG_TEST_CASE("RenderTarget width/height changed without calling SetRenderTarget");
FreeHostResource(GetHostResourceKey(g_pXboxRenderTarget)); g_pD3DDevice->SetRenderTarget(0, GetHostSurface(g_pXboxRenderTarget, D3DUSAGE_RENDERTARGET));
FreeHostResource(GetHostResourceKey(g_pXboxDepthStencil)); g_pD3DDevice->SetDepthStencilSurface(GetHostSurface(g_pXboxRenderTarget, D3DUSAGE_DEPTHSTENCIL));
}
// Store the updated viewport data ready to pass to host SetViewPort
HostViewPort = XboxViewPort;
if (g_ScaleViewport) {
// Get current host render target dimensions
DWORD HostRenderTarget_Width;