mql-for-begginers/Include/Canvas/DX/DXTexture.mqh

<EFBFBD><EFBFBD>//+------------------------------------------------------------------+
//|                                                    DXTexture.mqh |
//|                             Copyright 2000-2025, MetaQuotes Ltd. |
//|                                             https://www.mql5.com |
//+------------------------------------------------------------------+
#include "DXHandle.mqh"
#include <Canvas\Canvas.mqh>
//+------------------------------------------------------------------+
//| Class CDXTexture                                                 |
//+------------------------------------------------------------------+
class CDXTexture : public CDXHandleShared
  {
public:
   //+------------------------------------------------------------------+
   //| Destructor                                                       |
   //+------------------------------------------------------------------+
   virtual          ~CDXTexture(void)
     {
      Shutdown();
     }
   //+------------------------------------------------------------------+
   //| Create a new texture from bitmap file                            |
   //+------------------------------------------------------------------+
   bool              Create(int context,string path,uint data_x=0,uint data_y=0,uint data_width=0,uint data_height=0)
     {
      uint data[];
      uint width,height;
      //--- load image data
      if(StringFind(path,"::")==0)
        {
         //--- load from resource
         if(!ResourceReadImage(path,data,width,height))
            return(false);
        }
      else
        {  
         //--- load from file
         int w,h;
         if(!CCanvas::LoadBitmap(path,data,w,h))
            return(false);
         //--- save unsigned dimensions
         width=(uint)w;
         height=(uint)h;
        }
      //--- create texture from bitmap data
      return(Create(context,DX_FORMAT_B8G8R8A8_UNORM,width,height,data,data_x,data_y,data_width,data_height));
     }
   //+------------------------------------------------------------------+
   //| Create a new texture, only 32-bit pixel formats supported        |
   //+------------------------------------------------------------------+
   bool              Create(int context,ENUM_DX_FORMAT format,uint width,uint height,const uint &data[],uint data_x=0,uint data_y=0,uint data_width=0,uint data_height=0)
     {
      //--- check dimensions
      if(width<data_x+data_width || height<data_y+data_height)
         return(false);
      //--- shutdown texture
      Shutdown();
      //--- save new context
      m_context=context;
      //---
      if(data_width==0)
         data_width=width-data_x;
      if(data_height==0)
         data_height=height-data_y;
      //--- create new texture
      m_handle=DXTextureCreate(context,format,width,height,data,data_x,data_y,data_width,data_height);
      return(m_handle!=INVALID_HANDLE);
     }
   //+------------------------------------------------------------------+
   //| Shutdown                                                         |
   //+------------------------------------------------------------------+
   virtual void      Shutdown(void)
     {
      //--- relase handle
      if(m_handle!=INVALID_HANDLE)
         DXRelease(m_handle);
      m_handle=INVALID_HANDLE;
     }
  };
//+------------------------------------------------------------------+