关于开窗的问题

houyongtao · 发表于 2017-6-29 10:53:55

下面是一个写图片的函数，但是我取模得到的类型char型，函数要求是int型，强制转换数据应该不对。那么有什么办法修改这个函数，直接利用取模得到的就可以显示呢？我的屏幕利用的是RGB模式，是不是不能直接开窗啊？

typedef unsigned       char uint8_t;
typedef unsigned short    int uint16_t;
typedef unsigned          int uint32_t;
typedef unsigned    __int64 uint64_t;

void LCD_WriteBMP(uint32_t BmpAddress)
{
uint32_t index = 0, size = 0, width = 0, height = 0, bit_pixel = 0;
uint32_t Address;
uint32_t currentline = 0, linenumber = 0;

Address = CurrentFrameBuffer;

/* Read bitmap size */
size = *(__IO uint16_t *) (BmpAddress + 2);
size |= (*(__IO uint16_t *) (BmpAddress + 4)) << 16;//òì»ò￡¨òì1í¬0￡©

/* Get bitmap data address offset */
index = *(__IO uint16_t *) (BmpAddress + 10);
index |= (*(__IO uint16_t *) (BmpAddress + 12)) << 16;

/* Read bitmap width */
width = *(uint16_t *) (BmpAddress + 18);
width |= (*(uint16_t *) (BmpAddress + 20)) << 16;

/* Read bitmap height */
height = *(uint16_t *) (BmpAddress + 22);
height |= (*(uint16_t *) (BmpAddress + 24)) << 16;

/* Read bit/pixel */
bit_pixel = *(uint16_t *) (BmpAddress + 28);

if (CurrentLayer == LCD_BACKGROUND_LAYER)
{
      /* reconfigure layer size in accordance with the picture */
      TLDI_LayerSize(TLDI_Layer1, width, height);
      TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);

      /* Reconfigure the Layer pixel format in accordance with the picture */
      if ((bit_pixel/8) == 4)
      {
         TLDI_LayerPixelFormat(TLDI_Layer1, PF_ARGB8888);
         TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);
      }
      else if ((bit_pixel/8) == 2)
      {
         TLDI_LayerPixelFormat(TLDI_Layer1, PF_RGB565);
         TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);
      }
      else
      {
         TLDI_LayerPixelFormat(TLDI_Layer1, PF_RGB888);
         TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);
      }
}
else
{
      /* reconfigure layer size in accordance with the picture */
      TLDI_LayerSize(TLDI_Layer2, width, height);
      TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);

      /* Reconfigure the Layer pixel format in accordance with the picture */
      if ((bit_pixel/8) == 4)
      {
         TLDI_LayerPixelFormat(TLDI_Layer2, PF_ARGB8888);
         TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);
      }
      else if ((bit_pixel/8) == 2)
      {
         TLDI_LayerPixelFormat(TLDI_Layer2, PF_RGB565);
         TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);
      }
      else
      {
         TLDI_LayerPixelFormat(TLDI_Layer2, PF_RGB888);
         TLDI_ReloadConfig(TLDI_RELOADLAYERTYPE_FBR);
      }
}

/* compute the real size of the picture (without the header)) */
size = (size - index);

/* bypass the bitmap header */
BmpAddress += index;

/* start copie image from the bottom */
Address += width*(height-1)*(bit_pixel/8);

for(index = 0; index < size; index++)
{
      *(__IO uint8_t*) (Address) = *(__IO uint8_t *)BmpAddress;

      /*jump on next byte */
      BmpAddress++;
      Address++;
      currentline++;

      if((currentline/(bit_pixel/8)) == width)
      {
         if(linenumber < height)
         {
            linenumber++;
            Address -=(2*width*(bit_pixel/8));
            currentline = 0;
         }
      }
}
}