backup/DDrawCompat
1
0
Fork 0
mirror of https://github.com/narzoul/DDrawCompat synced 2024-12-30 08:55:36 +01:00
Code Issues Projects Releases Activity

Add extra rows to system memory primary surface buffers

Browse Source 
Fixes a memory corruption issue in Diablo 1, reported in issue #3.
This commit is contained in:
narzoul 2017-07-15 12:41:21 +02:00
parent 5668bf7c35
commit 6a2255160f
3 changed files with 41 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
DDrawCompat/Config/Config.h
View File

@ -7,4 +7,5 @@ namespace Config
const int maxPaletteUpdatesPerMs = 5;
const int minExpectedFlipsPerSec = 5;
const DWORD preallocatedGdiDcCount = 4;
const DWORD primarySurfaceExtraRows = 2;
}

33
DDrawCompat/DDraw/Surfaces/PrimarySurface.cpp
View File

@ -1,4 +1,5 @@
#include "Common/CompatPtr.h"
#include "Config/Config.h"
#include "DDraw/DirectDraw.h"
#include "DDraw/RealPrimarySurface.h"
#include "DDraw/Surfaces/PrimarySurface.h"
@ -25,6 +26,7 @@ namespace DDraw
g_gdiSurface = nullptr;
g_primarySurface = nullptr;
s_palette = nullptr;
s_surfaceBuffers.clear();
ZeroMemory(&s_paletteEntries, sizeof(s_paletteEntries));
ZeroMemory(&g_primarySurfaceDesc, sizeof(g_primarySurfaceDesc));
@ -70,6 +72,11 @@ namespace DDraw
g_primarySurfaceDesc.dwSize = sizeof(g_primarySurfaceDesc);
CompatVtable<IDirectDrawSurface7Vtbl>::s_origVtable.GetSurfaceDesc(surface7, &g_primarySurfaceDesc);
if (g_primarySurfaceDesc.ddsCaps.dwCaps & DDSCAPS_SYSTEMMEMORY)
{
resizeBuffers(*surface7);
}
return DD_OK;
}
@ -120,6 +127,31 @@ namespace DDraw
Compat::queryInterface<IDirectDrawSurface7>(g_primarySurface.get()));
}
void PrimarySurface::resizeBuffers(CompatRef<IDirectDrawSurface7> surface)
{
DDSCAPS2 flipCaps = {};
flipCaps.dwCaps = DDSCAPS_FLIP;
DDSURFACEDESC2 desc = {};
desc.dwSize = sizeof(desc);
desc.dwFlags = DDSD_LPSURFACE;
const DWORD newBufferSize = g_primarySurfaceDesc.lPitch *
(g_primarySurfaceDesc.dwHeight + Config::primarySurfaceExtraRows);
auto surfacePtr(CompatPtr<IDirectDrawSurface7>::from(&surface));
do
{
s_surfaceBuffers.push_back(std::vector<unsigned char>(newBufferSize));
desc.lpSurface = s_surfaceBuffers.back().data();
surfacePtr->SetSurfaceDesc(surfacePtr, &desc, 0);
CompatPtr<IDirectDrawSurface7> nextSurface;
surfacePtr->GetAttachedSurface(surfacePtr, &flipCaps, &nextSurface.getRef());
surfacePtr.swap(nextSurface);
} while (surfacePtr && surfacePtr != &surface);
}
void PrimarySurface::updateGdiSurfacePtr(IDirectDrawSurface* flipTargetOverride)
{
auto primary(CompatPtr<IDirectDrawSurface>::from(m_surface->getDirectDrawSurface().get()));
@ -153,4 +185,5 @@ namespace DDraw
CompatWeakPtr<IDirectDrawPalette> PrimarySurface::s_palette;
PALETTEENTRY PrimarySurface::s_paletteEntries[256] = {};
std::vector<std::vector<unsigned char>> PrimarySurface::s_surfaceBuffers;
}

7
DDrawCompat/DDraw/Surfaces/PrimarySurface.h
View File

@ -1,6 +1,9 @@
#pragma once
#include <vector>
#include "Common/CompatPtr.h"
#include "Common/CompatRef.h"
#include "DDraw/Surfaces/Surface.h"
namespace DDraw
@ -28,6 +31,10 @@ namespace DDraw
virtual void createImpl() override;
static void resizeBuffers(CompatRef<IDirectDrawSurface7> surface);
std::unique_ptr<Surface> m_surface;
static std::vector<std::vector<unsigned char>> s_surfaceBuffers;
};
}