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allocate memory with CreateFileMapping

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This commit is contained in:
FunkyFr3sh 2022-09-16 11:22:05 +02:00
parent 9b5856c496
commit 8a63e2b976
3 changed files with 44 additions and 8 deletions
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1
inc/IDirectDrawSurface.h
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@ -29,6 +29,7 @@ typedef struct IDirectDrawSurfaceImpl
IDirectDrawPaletteImpl* palette; IDirectDrawPaletteImpl* palette;
void* surface; void* surface;
HANDLE surface_mapping;
DWORD l_pitch; DWORD l_pitch;
DWORD lx_pitch; DWORD lx_pitch;
BOOL custom_surface; BOOL custom_surface;

3
src/IDirectDraw/IDirectDrawSurface.c
View file

@ -96,6 +96,9 @@ ULONG __stdcall IDirectDrawSurface__Release(IDirectDrawSurfaceImpl* This)
if (This->bmi) if (This->bmi)
HeapFree(GetProcessHeap(), 0, This->bmi); HeapFree(GetProcessHeap(), 0, This->bmi);
if (This->surface_mapping)
CloseHandle(This->surface_mapping);
if (This->backbuffer) if (This->backbuffer)
IDirectDrawSurface_Release(This->backbuffer); IDirectDrawSurface_Release(This->backbuffer);

48
src/ddsurface.c
View file

@ -1053,9 +1053,10 @@ HRESULT dd_CreateSurface(
DWORD aligned_width = dst_surface->l_pitch / dst_surface->lx_pitch; DWORD aligned_width = dst_surface->l_pitch / dst_surface->lx_pitch;
dst_surface->bmi = DWORD bmi_size = sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256;
HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256); DWORD bmp_size = dst_surface->l_pitch * (dst_surface->height + 200);
dst_surface->bmi = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, bmi_size);
dst_surface->bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); dst_surface->bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
dst_surface->bmi->bmiHeader.biWidth = aligned_width; dst_surface->bmi->bmiHeader.biWidth = aligned_width;
dst_surface->bmi->bmiHeader.biHeight = -((int)dst_surface->height + 200); dst_surface->bmi->bmiHeader.biHeight = -((int)dst_surface->height + 200);
@ -1097,18 +1098,49 @@ HRESULT dd_CreateSurface(
} }
dst_surface->hdc = CreateCompatibleDC(g_ddraw->render.hdc); dst_surface->hdc = CreateCompatibleDC(g_ddraw->render.hdc);
dst_surface->surface_mapping =
CreateFileMappingA(
INVALID_HANDLE_VALUE,
NULL,
PAGE_READWRITE | SEC_COMMIT,
0,
bmp_size + 256,
NULL);
DWORD map_offset = 0;
if (dst_surface->surface_mapping)
{
LPVOID data = MapViewOfFile(dst_surface->surface_mapping, FILE_MAP_READ, 0, 0, 0);
if (data)
{
while (((DWORD)data + map_offset) % 128) map_offset++;
UnmapViewOfFile(data);
}
if (!data || (map_offset % sizeof(DWORD)))
{
map_offset = 0;
CloseHandle(dst_surface->surface_mapping);
dst_surface->surface_mapping = NULL;
}
}
dst_surface->bitmap = dst_surface->bitmap =
CreateDIBSection(dst_surface->hdc, dst_surface->bmi, DIB_RGB_COLORS, (void**)&dst_surface->surface, NULL, 0); CreateDIBSection(
dst_surface->hdc,
dst_surface->bmi,
DIB_RGB_COLORS,
(void**)&dst_surface->surface,
dst_surface->surface_mapping,
map_offset);
dst_surface->bmi->bmiHeader.biHeight = -((int)dst_surface->height); dst_surface->bmi->bmiHeader.biHeight = -((int)dst_surface->height);
if (!dst_surface->bitmap) if (!dst_surface->bitmap)
{ {
dst_surface->surface = dst_surface->surface = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, bmp_size);
HeapAlloc(
GetProcessHeap(),
HEAP_ZERO_MEMORY,
dst_surface->l_pitch * (dst_surface->height + 200));
} }
if (dst_surface->caps & DDSCAPS_PRIMARYSURFACE) if (dst_surface->caps & DDSCAPS_PRIMARYSURFACE)