emwin透明图片

ccc_clive · 发表于 2023-9-5 09:11:53

emwin6.32 ，屏格式565的，图片1背景，图片2基于图片1透明，参考的安富莱emwin教程的时钟指针代码，但图片2透明部分总是黑的

static GUI_MEMDEV_Handle hMem1 = 0;

if(hMem1 == 0)
{
      extern GUI_CONST_STORAGE GUI_BITMAP bmpressure_bk;
      hMem1 = GUI_MEMDEV_CreateFixed(
         0,0,
         bmpressure_bk.XSize,
         bmpressure_bk.YSize+10,
         GUI_MEMDEV_NOTRANS,
         GUI_MEMDEV_APILIST_32,
         GUI_COLOR_CONV_8888);
      //hMem1 = GUI_MEMDEV_CreateEx(0, 0, (89), (56),GUI_MEMDEV_HASTRANS);
      GUI_MEMDEV_Select(hMem1);
      GUI_SetBkColor(GUI_TRANSPARENT);
      GUI_Clear();
      GUI_DrawBitmap(&bmpressure_bk, 0, 0);

      GUI_MEMDEV_Select(0);
}
static GUI_MEMDEV_Handle hMem2 = 0;
if(hMem2 == 0)
{
      extern GUI_CONST_STORAGE GUI_BITMAP bmpointer;
      hMem2 = GUI_MEMDEV_CreateFixed(
         0,0,
         bmpointer.XSize,
         bmpointer.YSize,
         GUI_MEMDEV_NOTRANS,
         GUI_MEMDEV_APILIST_32,
         GUI_COLOR_CONV_8888);
      //hMem2 = GUI_MEMDEV_CreateEx(0, 0, (42), (42),GUI_MEMDEV_HASTRANS);
      GUI_MEMDEV_Select(hMem2);
      GUI_SetBkColor(GUI_TRANSPARENT);
      GUI_Clear();

      GUI_DrawBitmap(&bmpointer, 0, 0);
      GUI_MEMDEV_Select(0);
}
int16_t x0 = 639 + 45;
int16_t y0 = 290 + 47;
int16_t r = 45;

static GUI_MEMDEV_Handle hMem = 0;
if(hMem == 0)
{
      //hMem = GUI_MEMDEV_Create(0, 0, (89), (56));
      hMem = GUI_MEMDEV_CreateFixed(
         0, 0, 89, 56,
         GUI_MEMDEV_NOTRANS,
         GUI_MEMDEV_APILIST_32,
         GUI_COLOR_CONV_8888);
}
GUI_MEMDEV_Select(hMem);
//GUI_MEMDEV_Select(hMem1);
GUI_SetBkColor(get_box_color());
GUI_Clear();
GUI_MEMDEV_WriteAt(hMem1,0,0);
GUI_MEMDEV_WriteAt(hMem2,41,10);

// GUI_POINT _bNeedle[6];
// float radian = acos(-1);
// int angle = _var_uint32(TREAT_PRESSURE);
// //radian = (_var_uint32(TREAT_PRESSURE) - 180) * radian / 180;
// radian = (angle - 180) * radian / 180;
// GUI_RotatePolygon(&_bNeedle[0], &_aNeedle[0], GUI_COUNTOF(_aNeedle), radian);
// GUI_SetColor(0xFFFFFFFF);
// GUI_FillPolygon(&_bNeedle[0], GUI_COUNTOF(_aNeedle), x0, y0);

// GUI_MEMDEV_CopyToLCD(hMem);
GUI_MEMDEV_Select(0);
GUI_MEMDEV_WriteAt(hMem,639,290);