Method AllocateBackingStore

src/video/win32_v.cpp:1140–1176

}

bool VideoDriver_Win32GDI::AllocateBackingStore(int w, int h, bool force)
{
	uint bpp = BlitterFactory::GetCurrentBlitter()->GetScreenDepth();

	w = std::max(w, 64);
	h = std::max(h, 64);

	if (!force && w == _screen.width && h == _screen.height) return false;

	BITMAPINFO *bi = (BITMAPINFO *)new char[sizeof(BITMAPINFOHEADER) + sizeof(RGBQUAD) * 256]();
	bi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);

	bi->bmiHeader.biWidth = this->width = w;
	bi->bmiHeader.biHeight = -(this->height = h);

	bi->bmiHeader.biPlanes = 1;
	bi->bmiHeader.biBitCount = bpp;
	bi->bmiHeader.biCompression = BI_RGB;

	if (this->dib_sect) DeleteObject(this->dib_sect);

	HDC dc = GetDC(0);
	this->dib_sect = CreateDIBSection(dc, bi, DIB_RGB_COLORS, (VOID **)&this->buffer_bits, nullptr, 0);
	if (this->dib_sect == nullptr) {
		delete[] bi;
		UserError("CreateDIBSection failed");
	}
	ReleaseDC(0, dc);

	_screen.width = w;
	_screen.pitch = (bpp == 8) ? Align(w, 4) : w;
	_screen.height = h;
	_screen.dst_ptr = this->GetVideoPointer();

	delete[] bi;
	return true;
}

bool VideoDriver_Win32GDI::AfterBlitterChange()
{