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Cxbx-Reloaded
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Fix MotoGP flicker 

Hack to handle BYPASSCOPY
This commit is contained in:
Anthony 2021-10-07 00:20:49 +13:00
parent b804ed1f03
commit 32fa33ddab
2 changed files with 26 additions and 12 deletions
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36
src/core/hle/D3D8/Direct3D9/Direct3D9.cpp
View File

@ -5207,19 +5207,31 @@ xbox::dword_xt WINAPI xbox::EMUPATCH(D3DDevice_Swap)
{
LOG_FUNC_ONE_ARG(Flags);
// TODO: Ensure this flag is always the same across library versions
if (Flags != 0 && Flags != CXBX_SWAP_PRESENT_FORWARD)
LOG_TEST_CASE("D3DDevice_Swap: Flags != 0");
g_LastD3DSwap = (xbox::X_D3DSWAP) Flags;
// TODO handle swap flags correctly
if (Flags == X_D3DSWAP_COPY) {
// Test case: Antialias sample, Backbufferscale use this flag
// This is supposed to allow rendering to the frontbuffer, but we don't maintain one right now
// Return so we don't Present
return g_Xbox_SwapData.Swap;
// Handle swap flags
// We don't maintain a swap chain, and draw everything to backbuffer 0
// so just hack around the swap flags for now...
static float prevBackBufferScaleX;
if (Flags == X_D3DSWAP_BYPASSCOPY) {
// Test case: MotoGp2
// Title handles copying to the frontbuffer itself, but we don't keep track of one
// MotoGp2 seems to copy a black rectangle over the backbuffer
// HACK: Effectively disable drawing - so the title can't copy anything around via draws
// and we just have to hope the title leaves the backbuffer untouched...
prevBackBufferScaleX = g_Xbox_BackbufferScaleX;
g_Xbox_BackbufferScaleX = 0;
}
else if (g_LastD3DSwap == X_D3DSWAP_BYPASSCOPY) {
g_Xbox_BackbufferScaleX = prevBackBufferScaleX;
}
g_LastD3DSwap = (xbox::X_D3DSWAP)Flags;
// Early exit if we're not ready to present
// Test Case: Antialias sample, BackBufferScale sample
// Which use D3DSWAP_COPY to render UI directly to the frontbuffer
// If we present before the UI is drawn, it will flicker
if(Flags != X_D3DSWAP_DEFAULT && !(Flags & X_D3DSWAP_FINISH))
return g_Xbox_SwapData.Swap;
// Fetch the host backbuffer
IDirect3DSurface *pCurrentHostBackBuffer = nullptr;

2
src/core/hle/D3D8/XbD3D8Types.h
View File

@ -664,7 +664,9 @@ X_D3DSWAPDATA;
typedef enum _X_D3DSWAP
{
X_D3DSWAP_DEFAULT = 0,
X_D3DSWAP_COPY = 1,
X_D3DSWAP_BYPASSCOPY = 2,
X_D3DSWAP_FINISH = 4,
}
X_D3DSWAP;