123 lines
2.8 KiB
C++
123 lines
2.8 KiB
C++
#include <windows.h>
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#include <d3d10.h>
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#include <VersionHelpers.h>
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#include <dxgi1_2.h>
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#include "get-graphics-offsets.h"
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typedef HRESULT (WINAPI *d3d10create_t)(IDXGIAdapter*, D3D10_DRIVER_TYPE,
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HMODULE, UINT, UINT, DXGI_SWAP_CHAIN_DESC*,
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IDXGISwapChain**, IUnknown**);
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typedef HRESULT (WINAPI *create_fac_t)(IID *id, void**);
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struct dxgi_info {
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HMODULE module;
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HWND hwnd;
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IDXGISwapChain *swap;
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};
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static const IID dxgiFactory2 =
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{0x50c83a1c, 0xe072, 0x4c48, {0x87, 0xb0, 0x36, 0x30, 0xfa, 0x36, 0xa6, 0xd0}};
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static inline bool dxgi_init(dxgi_info &info)
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{
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HMODULE d3d10_module;
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d3d10create_t create;
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create_fac_t create_factory;
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IDXGIFactory1 *factory;
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IDXGIAdapter1 *adapter;
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IUnknown *device;
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HRESULT hr;
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info.hwnd = CreateWindowExA(0, DUMMY_WNDCLASS, "d3d10 get-offset window",
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WS_POPUP, 0, 0, 2, 2, nullptr, nullptr,
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GetModuleHandleA(nullptr), nullptr);
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if (!info.hwnd) {
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return false;
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}
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info.module = LoadLibraryA("dxgi.dll");
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if (!info.module) {
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return false;
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}
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create_factory = (create_fac_t)GetProcAddress(info.module,
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"CreateDXGIFactory1");
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d3d10_module = LoadLibraryA("d3d10.dll");
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if (!d3d10_module) {
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return false;
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}
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create = (d3d10create_t)GetProcAddress(d3d10_module,
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"D3D10CreateDeviceAndSwapChain");
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if (!create) {
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return false;
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}
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IID factory_iid = IsWindows8OrGreater()
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? dxgiFactory2
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: __uuidof(IDXGIFactory1);
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hr = create_factory(&factory_iid, (void**)&factory);
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if (FAILED(hr)) {
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return false;
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}
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hr = factory->EnumAdapters1(0, &adapter);
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factory->Release();
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if (FAILED(hr)) {
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return false;
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}
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DXGI_SWAP_CHAIN_DESC desc = {};
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desc.BufferCount = 2;
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desc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
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desc.BufferDesc.Width = 2;
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desc.BufferDesc.Height = 2;
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desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
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desc.OutputWindow = info.hwnd;
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desc.SampleDesc.Count = 1;
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desc.Windowed = true;
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hr = create(adapter, D3D10_DRIVER_TYPE_HARDWARE, nullptr, 0,
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D3D10_SDK_VERSION, &desc, &info.swap, &device);
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adapter->Release();
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if (FAILED(hr)) {
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return false;
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}
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device->Release();
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return true;
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}
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static inline void dxgi_free(dxgi_info &info)
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{
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if (info.swap)
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info.swap->Release();
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if (info.hwnd)
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DestroyWindow(info.hwnd);
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}
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void get_dxgi_offsets(struct dxgi_offsets *offsets)
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{
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dxgi_info info = {};
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bool success = dxgi_init(info);
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HRESULT hr;
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if (success) {
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offsets->present = vtable_offset(info.module, info.swap, 8);
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offsets->resize = vtable_offset(info.module, info.swap, 13);
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IDXGISwapChain1 *swap1;
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hr = info.swap->QueryInterface(__uuidof(IDXGISwapChain1),
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(void**)&swap1);
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if (SUCCEEDED(hr)) {
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offsets->present1 =
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vtable_offset(info.module, swap1, 22);
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swap1->Release();
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}
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}
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dxgi_free(info);
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}
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