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win_drv.c 7.95 KB
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/**
* @file win_drv.c
*
*/
/*********************
* INCLUDES
*********************/
#include "win_drv.h"
#if USE_WINDOWS
#include <windows.h>
#include <windowsx.h>
#include "lvgl/lvgl.h"
#if LV_COLOR_DEPTH < 16
#error Windows driver only supports true RGB colors at this time
#endif
/**********************
* DEFINES
**********************/
#define WINDOW_STYLE (WS_OVERLAPPEDWINDOW & ~(WS_SIZEBOX | WS_MAXIMIZEBOX | WS_THICKFRAME))
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void do_register(void);
static void win_drv_flush(lv_disp_t *drv, lv_area_t *area, const lv_color_t * color_p);
static void win_drv_fill(int32_t x1, int32_t y1, int32_t x2, int32_t y2, lv_color_t color);
static void win_drv_map(int32_t x1, int32_t y1, int32_t x2, int32_t y2, const lv_color_t * color_p);
static void win_drv_read(lv_indev_t *drv, lv_indev_data_t * data);
static void msg_handler(void *param);
static COLORREF lv_color_to_colorref(const lv_color_t color);
static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam);
/**********************
* GLOBAL VARIABLES
**********************/
bool lv_win_exit_flag = false;
lv_disp_t *lv_windows_disp;
/**********************
* STATIC VARIABLES
**********************/
static HWND hwnd;
static uint32_t *fbp = NULL; /* Raw framebuffer memory */
static bool mouse_pressed;
static int mouse_x, mouse_y;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
const char g_szClassName[] = "LVGL";
HWND windrv_init(void)
{
WNDCLASSEX wc;
RECT winrect;
HICON lvgl_icon;
//Step 1: Registering the Window Class
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = GetModuleHandle(NULL);
lvgl_icon = (HICON) LoadImage( NULL, "lvgl_icon.bmp", IMAGE_ICON, 0, 0, LR_LOADFROMFILE);
if(lvgl_icon == NULL)
lvgl_icon = LoadIcon(NULL, IDI_APPLICATION);
wc.hIcon = lvgl_icon;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = g_szClassName;
wc.hIconSm = lvgl_icon;
if(!RegisterClassEx(&wc))
{
return NULL;
}
winrect.left = 0;
winrect.right = WINDOW_HOR_RES - 1;
winrect.top = 0;
winrect.bottom = WINDOW_VER_RES - 1;
AdjustWindowRectEx(&winrect, WINDOW_STYLE, FALSE, WS_EX_CLIENTEDGE);
OffsetRect(&winrect, -winrect.left, -winrect.top);
// Step 2: Creating the Window
hwnd = CreateWindowEx(
WS_EX_CLIENTEDGE,
g_szClassName,
"LVGL Simulator",
WINDOW_STYLE,
CW_USEDEFAULT, CW_USEDEFAULT, winrect.right, winrect.bottom,
NULL, NULL, GetModuleHandle(NULL), NULL);
if(hwnd == NULL)
{
return NULL;
}
ShowWindow(hwnd, SW_SHOWDEFAULT);
UpdateWindow(hwnd);
lv_task_create(msg_handler, 0, LV_TASK_PRIO_HIGHEST, NULL);
lv_win_exit_flag = false;
do_register();
}
/**********************
* STATIC FUNCTIONS
**********************/
static void do_register(void)
{
static lv_disp_draw_buf_t disp_buf_1;
static lv_color_t buf1_1[WINDOW_HOR_RES * 100]; /*A buffer for 10 rows*/
lv_disp_draw_buf_init(&disp_draw_buf_1, buf1_1, NULL, WINDOW_HOR_RES * 100); /*Initialize the display buffer*/
/*-----------------------------------
* Register the display in LVGLGL
*----------------------------------*/
static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
lv_disp_drv_init(&disp_drv); /*Basic initialization*/
/*Set up the functions to access to your display*/
/*Set the resolution of the display*/
disp_drv.hor_res = WINDOW_HOR_RES;
disp_drv.ver_res = WINDOW_VER_RES;
/*Used to copy the buffer's content to the display*/
disp_drv.flush_cb = win_drv_flush;
/*Set a display buffer*/
disp_drv.draw_buf = &disp_buf_1;
/*Finally register the driver*/
lv_windows_disp = lv_disp_drv_register(&disp_drv);
static lv_indev_drv_t indev_drv;
lv_indev_drv_init(&indev_drv);
indev_drv.type = LV_INDEV_TYPE_POINTER;
indev_drv.read_cb = win_drv_read;
lv_indev_drv_register(&indev_drv);
}
static void msg_handler(void *param)
{
(void)param;
MSG msg;
BOOL bRet;
if( (bRet = PeekMessage( &msg, NULL, 0, 0, TRUE )) != 0)
{
if (bRet == -1)
{
return;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
if(msg.message == WM_QUIT)
lv_win_exit_flag = true;
}
}
static void win_drv_read(lv_indev_t *drv, lv_indev_data_t * data)
{
data->state = mouse_pressed ? LV_INDEV_STATE_PR : LV_INDEV_STATE_REL;
data->point.x = mouse_x;
data->point.y = mouse_y;
}
static void on_paint(void)
{
HBITMAP bmp = CreateBitmap(WINDOW_HOR_RES, WINDOW_VER_RES, 1, 32, fbp);
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hwnd, &ps);
HDC hdcMem = CreateCompatibleDC(hdc);
HBITMAP hbmOld = SelectObject(hdcMem, bmp);
BitBlt(hdc, 0, 0, WINDOW_HOR_RES, WINDOW_VER_RES, hdcMem, 0, 0, SRCCOPY);
SelectObject(hdcMem, hbmOld);
DeleteDC(hdcMem);
EndPaint(hwnd, &ps);
DeleteObject(bmp);
}
/**
* Flush a buffer to the marked area
* @param x1 left coordinate
* @param y1 top coordinate
* @param x2 right coordinate
* @param y2 bottom coordinate
* @param color_p an array of colors
*/
static void win_drv_flush(lv_disp_t *drv, lv_area_t *area, const lv_color_t * color_p)
{
win_drv_map(area->x1, area->y1, area->x2, area->y2, color_p);
lv_disp_flush_ready(drv);
}
/**
* Put a color map to the marked area
* @param x1 left coordinate
* @param y1 top coordinate
* @param x2 right coordinate
* @param y2 bottom coordinate
* @param color_p an array of colors
*/
static void win_drv_map(int32_t x1, int32_t y1, int32_t x2, int32_t y2, const lv_color_t * color_p)
{
for(int y = y1; y <= y2; y++)
{
for(int x = x1; x <= x2; x++)
{
fbp[y*WINDOW_HOR_RES+x] = lv_color_to32(*color_p);
color_p++;
}
}
InvalidateRect(hwnd, NULL, FALSE);
UpdateWindow(hwnd);
}
static LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
switch(msg) {
case WM_CREATE:
fbp = malloc(4*WINDOW_HOR_RES*WINDOW_VER_RES);
if(fbp == NULL)
return 1;
SetTimer(hwnd, 0, 10, (TIMERPROC)lv_task_handler);
SetTimer(hwnd, 1, 25, NULL);
return 0;
case WM_MOUSEMOVE:
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
mouse_x = GET_X_LPARAM(lParam);
mouse_y = GET_Y_LPARAM(lParam);
if(msg == WM_LBUTTONDOWN || msg == WM_LBUTTONUP) {
mouse_pressed = (msg == WM_LBUTTONDOWN);
}
return 0;
case WM_CLOSE:
free(fbp);
fbp = NULL;
DestroyWindow(hwnd);
return 0;
case WM_PAINT:
on_paint();
return 0;
case WM_TIMER:
lv_tick_inc(25);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
break;
}
return DefWindowProc(hwnd, msg, wParam, lParam);
}
static COLORREF lv_color_to_colorref(const lv_color_t color)
{
uint32_t raw_color = lv_color_to32(color);
lv_color32_t tmp;
tmp.full = raw_color;
uint32_t colorref = RGB(tmp.ch.red, tmp.ch.green, tmp.ch.blue);
return colorref;
}
#endif

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