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1 /**************************************************************************
2  *
3  * Copyright 2010 VMware, Inc.
4  * All Rights Reserved.
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the
8  * "Software"), to deal in the Software without restriction, including
9  * without limitation the rights to use, copy, modify, merge, publish,
10  * distribute, sub license, and/or sell copies of the Software, and to
11  * permit persons to whom the Software is furnished to do so, subject to
12  * the following conditions:
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
18  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * The above copyright notice and this permission notice (including the
23  * next paragraph) shall be included in all copies or substantial portions
24  * of the Software.
25  *
26  *
27  **************************************************************************/
28 
29 #include "gdi/gdi_sw_winsys.h"
30 #include "pipe/p_screen.h"
31 #include "state_tracker/graw.h"
32 #include "target-helpers/inline_debug_helper.h"
33 #include "target-helpers/inline_sw_helper.h"
34 #include <windows.h>
35 
36 
37 static LRESULT CALLBACK
window_proc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)38 window_proc(HWND hWnd,
39             UINT uMsg,
40             WPARAM wParam,
41             LPARAM lParam)
42 {
43    switch (uMsg) {
44    case WM_DESTROY:
45       PostQuitMessage(0);
46       break;
47 
48    default:
49       return DefWindowProc(hWnd, uMsg, wParam, lParam);
50    }
51 
52    return 0;
53 }
54 
55 static struct {
56    void (* draw)(void);
57 } graw;
58 
59 struct pipe_screen *
graw_create_window_and_screen(int x,int y,unsigned width,unsigned height,enum pipe_format format,void ** handle)60 graw_create_window_and_screen(int x,
61                               int y,
62                               unsigned width,
63                               unsigned height,
64                               enum pipe_format format,
65                               void **handle)
66 {
67    struct sw_winsys *winsys = NULL;
68    struct pipe_screen *screen = NULL;
69    WNDCLASSEX wc;
70    UINT style = WS_VISIBLE | WS_TILEDWINDOW;
71    RECT rect;
72    HWND hWnd = NULL;
73    HDC hDC = NULL;
74 
75    if (format != PIPE_FORMAT_R8G8B8A8_UNORM)
76       goto fail;
77 
78    winsys = gdi_create_sw_winsys();
79    if (winsys == NULL)
80       goto fail;
81 
82    screen = sw_screen_create(winsys);
83    if (screen == NULL)
84       goto fail;
85 
86    memset(&wc, 0, sizeof wc);
87    wc.cbSize = sizeof wc;
88    wc.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
89    wc.lpfnWndProc = window_proc;
90    wc.lpszClassName = "graw-gdi";
91    wc.hInstance = GetModuleHandle(NULL);
92    wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
93    wc.hCursor = LoadCursor(NULL, IDC_ARROW);
94    wc.hbrBackground = (HBRUSH)(COLOR_BTNFACE + 1);
95    RegisterClassEx(&wc);
96 
97    SetRect(&rect, 0, 0, width, height);
98    AdjustWindowRectEx(&rect, style, FALSE, 0);
99 
100    hWnd = CreateWindowEx(0,
101                          wc.lpszClassName,
102                          wc.lpszClassName,
103                          style,
104                          x,
105                          y,
106                          rect.right - rect.left,
107                          rect.bottom - rect.top,
108                          NULL,
109                          NULL,
110                          wc.hInstance,
111                          0);
112    if (hWnd == NULL)
113       goto fail;
114 
115    hDC = GetDC(hWnd);
116    if (hDC == NULL)
117       goto fail;
118 
119    *handle = (void *)hDC;
120 
121    return debug_screen_wrap(screen);
122 
123 fail:
124    if (hWnd)
125       DestroyWindow(hWnd);
126 
127    if (screen)
128       screen->destroy(screen);
129 
130    return NULL;
131 }
132 
133 void
graw_set_display_func(void (* draw)(void))134 graw_set_display_func(void (* draw)(void))
135 {
136    graw.draw = draw;
137 }
138 
139 void
graw_main_loop(void)140 graw_main_loop(void)
141 {
142    for (;;) {
143       MSG msg;
144 
145       while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
146          if (msg.message == WM_QUIT) {
147             return;
148          }
149          TranslateMessage(&msg);
150          DispatchMessage(&msg);
151       }
152 
153       if (graw.draw) {
154          graw.draw();
155       }
156 
157       Sleep(0);
158    }
159 }
160