demos: Split demo_win32.h.

Much like we did for demo_xcb.h, demo_win32.h now just has the bits for
creating windows and handling events, while demo_d3d12.h has the d3d12
and dxgi bits.

demos/demo_d3d12.h

@@ -0,0 +1,214 @@
+/*
+ * Copyright 2016 Józef Kucia for CodeWeavers
+ * Copyright 2016 Henri Verbeet for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include <vkd3d_dxgi1_4.h>
+#include <vkd3d_d3dcompiler.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+struct demo_win32
+{
+    UINT (*GetDpiForSystem)(void);
+};
+
+struct demo
+{
+    struct demo_win32 win32;
+
+    size_t window_count;
+
+    void *user_data;
+    void (*idle_func)(struct demo *demo, void *user_data);
+};
+
+struct demo_window
+{
+    struct demo *demo;
+
+    void *user_data;
+    void (*expose_func)(struct demo_window *window, void *user_data);
+    void (*key_press_func)(struct demo_window *window, demo_key key, void *user_data);
+};
+
+static inline bool demo_window_init(struct demo_window *window, struct demo *demo, void *user_data)
+{
+    window->demo = demo;
+    window->user_data = user_data;
+    window->expose_func = NULL;
+    window->key_press_func = NULL;
+    ++demo->window_count;
+
+    return true;
+}
+
+static inline void demo_window_cleanup(struct demo_window *window)
+{
+    --window->demo->window_count;
+}
+
+#include "demo_win32.h"
+
+struct demo_swapchain
+{
+    IDXGISwapChain3 *swapchain;
+};
+
+static inline void demo_cleanup(struct demo *demo)
+{
+    demo_win32_cleanup(demo);
+}
+
+static inline bool demo_init(struct demo *demo, void *user_data)
+{
+    if (!demo_win32_init(&demo->win32))
+    {
+        fprintf(stderr, "Failed to initialise demo.\n");
+        return false;
+    }
+
+    demo->window_count = 0;
+    demo->user_data = user_data;
+    demo->idle_func = NULL;
+
+    return true;
+}
+
+static inline void demo_get_dpi(struct demo *demo, double *dpi_x, double *dpi_y)
+{
+    demo_win32_get_dpi(demo, dpi_x, dpi_y);
+}
+
+static inline void demo_process_events(struct demo *demo)
+{
+    demo_win32_process_events(demo);
+}
+
+static inline void demo_set_idle_func(struct demo *demo,
+        void (*idle_func)(struct demo *demo, void *user_data))
+{
+    demo->idle_func = idle_func;
+}
+
+static inline void demo_window_destroy(struct demo_window *window)
+{
+    demo_window_win32_destroy(window);
+}
+
+static inline struct demo_window *demo_window_create(struct demo *demo, const char *title,
+        unsigned int width, unsigned int height, void *user_data)
+{
+    return demo_window_win32_create(demo, title, width, height, user_data);
+}
+
+static inline void demo_window_set_expose_func(struct demo_window *window,
+        void (*expose_func)(struct demo_window *window, void *user_data))
+{
+    window->expose_func = expose_func;
+}
+
+static inline void demo_window_set_key_press_func(struct demo_window *window,
+        void (*key_press_func)(struct demo_window *window, demo_key key, void *user_data))
+{
+    window->key_press_func = key_press_func;
+}
+
+static inline struct demo_swapchain *demo_swapchain_create(ID3D12CommandQueue *command_queue,
+        struct demo_window *window, const struct demo_swapchain_desc *desc)
+{
+    struct demo_window_win32 *window_win32 = CONTAINING_RECORD(window, struct demo_window_win32, w);
+    DXGI_SWAP_CHAIN_DESC1 swapchain_desc;
+    struct demo_swapchain *swapchain;
+    IDXGISwapChain1 *swapchain1;
+    IDXGIFactory2 *factory;
+    HRESULT hr;
+
+    if (!(swapchain = malloc(sizeof(*swapchain))))
+        return NULL;
+
+    if (FAILED(CreateDXGIFactory1(&IID_IDXGIFactory2, (void **)&factory)))
+        goto fail;
+
+    memset(&swapchain_desc, 0, sizeof(swapchain_desc));
+    swapchain_desc.BufferCount = desc->buffer_count;
+    swapchain_desc.Width = desc->width;
+    swapchain_desc.Height = desc->height;
+    swapchain_desc.Format = desc->format;
+    swapchain_desc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    swapchain_desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_DISCARD;
+    swapchain_desc.SampleDesc.Count = 1;
+
+    hr = IDXGIFactory2_CreateSwapChainForHwnd(factory, (IUnknown *)command_queue,
+            window_win32->window, &swapchain_desc, NULL, NULL, &swapchain1);
+    IDXGIFactory2_Release(factory);
+    if (FAILED(hr))
+        goto fail;
+
+    hr = IDXGISwapChain1_QueryInterface(swapchain1, &IID_IDXGISwapChain3, (void **)&swapchain->swapchain);
+    IDXGISwapChain1_Release(swapchain1);
+    if (FAILED(hr))
+        goto fail;
+
+    return swapchain;
+
+fail:
+    free(swapchain);
+    return NULL;
+}
+
+static inline unsigned int demo_swapchain_get_current_back_buffer_index(struct demo_swapchain *swapchain)
+{
+    return IDXGISwapChain3_GetCurrentBackBufferIndex(swapchain->swapchain);
+}
+
+static inline ID3D12Resource *demo_swapchain_get_back_buffer(struct demo_swapchain *swapchain, unsigned int index)
+{
+    ID3D12Resource *buffer;
+
+    if (FAILED(IDXGISwapChain3_GetBuffer(swapchain->swapchain, index,
+            &IID_ID3D12Resource, (void **)&buffer)))
+        return NULL;
+
+    return buffer;
+}
+
+static inline void demo_swapchain_present(struct demo_swapchain *swapchain)
+{
+    IDXGISwapChain3_Present(swapchain->swapchain, 1, 0);
+}
+
+static inline void demo_swapchain_destroy(struct demo_swapchain *swapchain)
+{
+    IDXGISwapChain3_Release(swapchain->swapchain);
+    free(swapchain);
+}
+
+static inline HANDLE demo_create_event(void)
+{
+    return CreateEventA(NULL, FALSE, FALSE, NULL);
+}
+
+static inline unsigned int demo_wait_event(HANDLE event, unsigned int ms)
+{
+    return WaitForSingleObject(event, ms);
+}
+
+static inline void demo_destroy_event(HANDLE event)
+{
+    CloseHandle(event);
+}