From 014870b1ffb79863465c72b0e231c673f4ca777b Mon Sep 17 00:00:00 2001
From: Joshua Ashton <joshua@froggi.es>
Date: Sun, 26 May 2019 19:30:06 +0100
Subject: [PATCH] [util] Add helpers for GDI/DDI interop

---
 src/util/meson.build  |  1 +
 src/util/util_gdi.cpp | 33 +++++++++++++++++++++++++++++++++
 src/util/util_gdi.h   | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 66 insertions(+)
 create mode 100644 src/util/util_gdi.cpp
 create mode 100644 src/util/util_gdi.h

diff --git a/src/util/meson.build b/src/util/meson.build
index 50583f23c..1a18d834e 100644
--- a/src/util/meson.build
+++ b/src/util/meson.build
@@ -1,6 +1,7 @@
 util_src = files([
   'util_env.cpp',
   'util_string.cpp',
+  'util_gdi.cpp',
   
   'com/com_guid.cpp',
   'com/com_private_data.cpp',
diff --git a/src/util/util_gdi.cpp b/src/util/util_gdi.cpp
new file mode 100644
index 000000000..901dd05ca
--- /dev/null
+++ b/src/util/util_gdi.cpp
@@ -0,0 +1,33 @@
+#include "util_gdi.h"
+#include "log/log.h"
+
+namespace dxvk {
+
+  HMODULE GetGDIModule() {
+    static HMODULE module = LoadLibraryA("gdi32.dll");
+    return module;
+  }
+
+  NTSTATUS D3DKMTCreateDCFromMemory(D3DKMT_CREATEDCFROMMEMORY* Arg1) {
+    static auto func = (D3DKMTCreateDCFromMemoryType)
+      GetProcAddress(GetGDIModule(), "D3DKMTCreateDCFromMemory");
+
+    if (func != nullptr)
+      return func(Arg1);
+
+    Logger::warn("D3DKMTCreateDCFromMemory: Unable to query proc address.");
+    return -1;
+  }
+
+  NTSTATUS D3DKMTDestroyDCFromMemory(D3DKMT_DESTROYDCFROMMEMORY* Arg1) {
+    static auto func = (D3DKMTDestroyDCFromMemoryType)
+      GetProcAddress(GetGDIModule(), "D3DKMTDestroyDCFromMemory");
+
+    if (func != nullptr)
+      return func(Arg1);
+
+    Logger::warn("D3DKMTDestroyDCFromMemory: Unable to query proc address.");
+    return -1;
+  }
+
+}
\ No newline at end of file
diff --git a/src/util/util_gdi.h b/src/util/util_gdi.h
new file mode 100644
index 000000000..58724b155
--- /dev/null
+++ b/src/util/util_gdi.h
@@ -0,0 +1,32 @@
+#pragma once
+
+#include <d3d9.h>
+
+namespace dxvk {
+  using NTSTATUS = LONG;
+
+  // Slightly modified definitions...
+  struct D3DKMT_CREATEDCFROMMEMORY {
+    void*         pMemory;
+    D3DFORMAT     Format;
+    UINT          Width;
+    UINT          Height;
+    UINT          Pitch;
+    HDC           hDeviceDc;
+    PALETTEENTRY* pColorTable;
+    HDC           hDc;
+    HANDLE        hBitmap;
+  };
+
+  struct D3DKMT_DESTROYDCFROMMEMORY {
+    HDC    hDC     = nullptr;
+    HANDLE hBitmap = nullptr;
+  };
+
+  using D3DKMTCreateDCFromMemoryType  = NTSTATUS(STDMETHODCALLTYPE*) (D3DKMT_CREATEDCFROMMEMORY*);
+  NTSTATUS D3DKMTCreateDCFromMemory (D3DKMT_CREATEDCFROMMEMORY*  Arg1);
+
+  using D3DKMTDestroyDCFromMemoryType = NTSTATUS(STDMETHODCALLTYPE*) (D3DKMT_DESTROYDCFROMMEMORY*);
+  NTSTATUS D3DKMTDestroyDCFromMemory(D3DKMT_DESTROYDCFROMMEMORY* Arg1);
+
+}
\ No newline at end of file