1 /**
2 * @file lv_windows_display.c
3 *
4 */
5
6 /*********************
7 * INCLUDES
8 *********************/
9
10 #include "lv_windows_display.h"
11 #if LV_USE_WINDOWS
12
13 #include "lv_windows_context.h"
14
15 #include <process.h>
16
17 /*********************
18 * DEFINES
19 *********************/
20
21 /**********************
22 * TYPEDEFS
23 **********************/
24
25 /**********************
26 * STATIC PROTOTYPES
27 **********************/
28
29 static unsigned int __stdcall lv_windows_display_thread_entrypoint(
30 void * parameter);
31
32 /**********************
33 * STATIC VARIABLES
34 **********************/
35
36 /**********************
37 * MACROS
38 **********************/
39
40 /**********************
41 * GLOBAL FUNCTIONS
42 **********************/
43
lv_windows_create_display(const wchar_t * title,int32_t hor_res,int32_t ver_res,int32_t zoom_level,bool allow_dpi_override,bool simulator_mode)44 lv_display_t * lv_windows_create_display(
45 const wchar_t * title,
46 int32_t hor_res,
47 int32_t ver_res,
48 int32_t zoom_level,
49 bool allow_dpi_override,
50 bool simulator_mode)
51 {
52 lv_windows_create_display_data_t data;
53
54 lv_memzero(&data, sizeof(lv_windows_create_display_data_t));
55 data.title = title;
56 data.hor_res = hor_res;
57 data.ver_res = ver_res;
58 data.zoom_level = zoom_level;
59 data.allow_dpi_override = allow_dpi_override;
60 data.simulator_mode = simulator_mode;
61 data.mutex = CreateEventExW(NULL, NULL, 0, EVENT_ALL_ACCESS);
62 data.display = NULL;
63 if(!data.mutex) {
64 return NULL;
65 }
66
67 HANDLE thread = (HANDLE)_beginthreadex(
68 NULL,
69 0,
70 lv_windows_display_thread_entrypoint,
71 &data,
72 0,
73 NULL);
74 LV_ASSERT(thread);
75
76 WaitForSingleObjectEx(data.mutex, INFINITE, FALSE);
77
78 if(thread) {
79 CloseHandle(thread);
80 }
81
82 if(data.mutex) {
83 CloseHandle(data.mutex);
84 }
85
86 return data.display;
87 }
88
lv_windows_get_display_window_handle(lv_display_t * display)89 HWND lv_windows_get_display_window_handle(lv_display_t * display)
90 {
91 return (HWND)lv_display_get_driver_data(display);
92 }
93
lv_windows_zoom_to_logical(int32_t physical,int32_t zoom_level)94 int32_t lv_windows_zoom_to_logical(int32_t physical, int32_t zoom_level)
95 {
96 return MulDiv(physical, LV_WINDOWS_ZOOM_BASE_LEVEL, zoom_level);
97 }
98
lv_windows_zoom_to_physical(int32_t logical,int32_t zoom_level)99 int32_t lv_windows_zoom_to_physical(int32_t logical, int32_t zoom_level)
100 {
101 return MulDiv(logical, zoom_level, LV_WINDOWS_ZOOM_BASE_LEVEL);
102 }
103
lv_windows_dpi_to_logical(int32_t physical,int32_t dpi)104 int32_t lv_windows_dpi_to_logical(int32_t physical, int32_t dpi)
105 {
106 return MulDiv(physical, USER_DEFAULT_SCREEN_DPI, dpi);
107 }
108
lv_windows_dpi_to_physical(int32_t logical,int32_t dpi)109 int32_t lv_windows_dpi_to_physical(int32_t logical, int32_t dpi)
110 {
111 return MulDiv(logical, dpi, USER_DEFAULT_SCREEN_DPI);
112 }
113
114 /**********************
115 * STATIC FUNCTIONS
116 **********************/
117
lv_windows_display_thread_entrypoint(void * parameter)118 static unsigned int __stdcall lv_windows_display_thread_entrypoint(
119 void * parameter)
120 {
121 lv_windows_create_display_data_t * data = parameter;
122 LV_ASSERT_NULL(data);
123
124 DWORD window_style = WS_OVERLAPPEDWINDOW;
125 if(data->simulator_mode) {
126 window_style &= ~(WS_SIZEBOX | WS_MAXIMIZEBOX | WS_THICKFRAME);
127 }
128
129 HWND window_handle = CreateWindowExW(
130 WS_EX_CLIENTEDGE,
131 L"LVGL.Window",
132 data->title,
133 window_style,
134 CW_USEDEFAULT,
135 0,
136 data->hor_res,
137 data->ver_res,
138 NULL,
139 NULL,
140 NULL,
141 data);
142 if(!window_handle) {
143 return 0;
144 }
145
146 lv_windows_window_context_t * context = lv_windows_get_window_context(
147 window_handle);
148 if(!context) {
149 return 0;
150 }
151
152 data->display = context->display_device_object;
153
154 ShowWindow(window_handle, SW_SHOW);
155 UpdateWindow(window_handle);
156
157 LV_ASSERT(SetEvent(data->mutex));
158
159 data = NULL;
160
161 MSG message;
162 while(GetMessageW(&message, NULL, 0, 0)) {
163 TranslateMessage(&message);
164 DispatchMessageW(&message);
165 }
166
167 return 0;
168 }
169
170 #endif // LV_USE_WINDOWS
171
