Canvas issue

[Lorentzos Roussos]

Hello 

I've found a small issue on canvas where if you erase a canvas with 0 opacity and subsequently save the placeholder bmp it does not save the bmp as an empty fully transparent one.

Change ColorToARGB from ,0 to ,1 to see the difference .

Thanks 

#include <Canvas\Canvas.mqh>
CCanvas DESIGNER;
int OnInit()
  {
  ResourceFree("YELLOW_RESOURCE");
  ResourceFree("VOID_RESOURCE");
  DESIGNER.Destroy();
  DESIGNER.Create("DESI",200,100,COLOR_FORMAT_ARGB_NORMALIZE);
  DESIGNER.Erase(ColorToARGB(clrBlack,0));
  DESIGNER.Update(true);
  ResourceSave(DESIGNER.ResourceName(),"void_square.bmp");
  DESIGNER.Destroy();
  DESIGNER.Create("DESI2",200,200,COLOR_FORMAT_ARGB_NORMALIZE);
  DESIGNER.Erase(0);
  DESIGNER.FillRectangle(0,0,199,199,ColorToARGB(clrYellow,255));
  DESIGNER.Update(true);
  ResourceSave(DESIGNER.ResourceName(),"yello_square.bmp");
  DESIGNER.Destroy();
  //load files as res
    ResetLastError();
    if(!ResourceCreate("YELLOW_RESOURCE","..\\..\\Files\\yello_square.bmp")){
      Print("Cannot load the yellow box resource #"+IntegerToString(GetLastError()));
      }
    ResetLastError();
    if(!ResourceCreate("VOID_RESOURCE","..\\..\\Files\\void_square.bmp")){
      Print("Cannot load the void box resource #"+IntegerToString(GetLastError()));
      }
  ObjectCreate(0,"YELLOW_SQUARE",OBJ_BITMAP_LABEL,0,0,0);
  ObjectSetInteger(0,"YELLOW_SQUARE",OBJPROP_XSIZE,200);
  ObjectSetInteger(0,"YELLOW_SQUARE",OBJPROP_YSIZE,200);
  ObjectSetInteger(0,"YELLOW_SQUARE",OBJPROP_XDISTANCE,20);
  ObjectSetInteger(0,"YELLOW_SQUARE",OBJPROP_YDISTANCE,20);
  ObjectSetString(0,"YELLOW_SQUARE",OBJPROP_BMPFILE,"::YELLOW_RESOURCE");

  ObjectCreate(0,"VOID_SQUARE",OBJ_BITMAP_LABEL,0,0,0);
  ObjectSetInteger(0,"VOID_SQUARE",OBJPROP_XSIZE,200);
  ObjectSetInteger(0,"VOID_SQUARE",OBJPROP_YSIZE,100);
  ObjectSetInteger(0,"VOID_SQUARE",OBJPROP_XDISTANCE,20);
  ObjectSetInteger(0,"VOID_SQUARE",OBJPROP_YDISTANCE,120);
  ObjectSetString(0,"VOID_SQUARE",OBJPROP_BMPFILE,"::VOID_RESOURCE");
  
  return(INIT_SUCCEEDED);
  }
void OnDeinit(const int reason)
  {
  ResourceFree("YELLOW_RESOURCE");
  ResourceFree("VOID_RESOURCE");
  ObjectDelete(0,"YELLOW_SQUARE");
  ObjectDelete(0,"VOID_SQUARE");
  }

void OnTick()
  {
 }