//
                        WriteData(DPYCOLORTRANSLATE(ulByte));

                        //
                        // Decrement the count of pixels to draw.
                        //
                        lCount--;

                        //
                        // See if there is another pixel to draw.
                        //
                        if(lCount)
                        {
                case 1:
                            //
                            // Get the lower nibble of the next byte of pixel
                            // data and extract the corresponding entry from
                            // the palette.
                            //
                            ulByte = (*pucData++ & 15) * 3;
                            ulByte = (*(unsigned long *)(pucPalette + ulByte) &
                                      0x00ffffff);

                            //
                            // Translate this palette entry and write it to the
                            // screen.
                            //
                            WriteData(DPYCOLORTRANSLATE(ulByte));

                            //
                            // Decrement the count of pixels to draw.
                            //
                            lCount--;
                        }
                    }
            }

            //
            // The image data has been drawn.
            //
            break;
        }

        //
        // The pixel data is in 8 bit per pixel format.
        //
        case 8:
        {
            //
            // Loop while there are more pixels to draw.
            //
            while(lCount--)
            {
                //
                // Get the next byte of pixel data and extract the
                // corresponding entry from the palette.
                //
                ulByte = *pucData++ * 3;
                ulByte = *(unsigned long *)(pucPalette + ulByte) & 0x00ffffff;

                //
                // Translate this palette entry and write it to the screen.
                //
                WriteData(DPYCOLORTRANSLATE(ulByte));
            }

            //
            // The image data has been drawn.
            //
            break;
        }

        //
        // We are being passed data in the display's native format.  Merely
        // write it directly to the display.  This is a special case which is
        // not used by the graphics library but which is helpful to
        // applications which may want to handle, for example, JPEG images.
        //
        case 16:
        {
            unsigned short usByte;

            //
            // Loop while there are more pixels to draw.
            //
            while(lCount--)
            {
                //
                // Get the next byte of pixel data and extract the
                // corresponding entry from the palette.
                //
                usByte = *((unsigned short *)pucData);
                pucData += 2;

                //
                // Translate this palette entry and write it to the screen.
                //
                WriteData(usByte);
            }
        }
    }
}

//*****************************************************************************
//
//! Draws a horizontal line.
//!
//! \param pvDisplayData is a pointer to the driver-specific data for this
//! display driver.
//! \param lX1 is the X coordinate of the start of the line.
//! \param lX2 is the X coordinate of the end of the line.
//! \param lY is the Y coordinate of the line.
//! \param ulValue is the color of the line.
//!
//! This function draws a horizontal line on the display.  The coordinates of
//! the line are assumed to be within the extents of the display.
//!
//! \return None.
//
//*****************************************************************************
static void
Kitronix240x320x16_SD60154LineDrawH(void *pvDisplayData, long lX1, long lX2,
                                   long lY, unsigned long ulValue)
{

    //
    // Set the cursor increment to left to right, followed by top to bottom.
    //
    WriteCommand(S6D0154_ENTRY_MODE_REG);
    WriteData(MAKE_ENTRY_MODE(HORIZ_DIRECTION));

    //
    // Set the starting X address of the display cursor.
    //
  
    WriteCommand(S6D0154_H_RAM_ADDR_REG);
    WriteData(MAPPED_X(lX1, lY));

    //
    // Set the Y address of the display cursor.
    //
    WriteCommand(S6D0154_V_RAM_ADDR_REG);
    WriteData(MAPPED_Y(lX1, lY));

    //
    // Write the data RAM write command.
    //
    WriteCommand(S6D0154_RAM_DATA_REG);

    //
    // Loop through the pixels of this horizontal line.
    //
    while(lX1++ <= lX2)
    {
        //
        // Write the pixel value.
        //
        WriteData(ulValue);
    }

}

//*****************************************************************************
//
//! Draws a vertical line.
//!
//! \param pvDisplayData is a pointer to the driver-specific data for this
//! display driver.
//! \param lX is the X coordinate of the line.
//! \param lY1 is the Y coordinate of the start of the line.
//! \param lY2 is the Y coordinate of the end of the line.
//! \param ulValue is the color of the line.
//!
//! This function draws a vertical line on the display.  The coordinates of the
//! line are assumed to be within the extents of the display.
//!
//! \return None.
//
//*****************************************************************************
static void
Kitronix240x320x16_SD60154LineDrawV(void *pvDisplayData, long lX, long lY1,
                                   long lY2, unsigned long ulValue)
{
  
    //
    // Set the cursor increment to top to bottom, followed by left to right.
    //
    WriteCommand(S6D0154_ENTRY_MODE_REG);
    WriteData(MAKE_ENTRY_MODE(VERT_DIRECTION));

    //
    // Set the X address of the display cursor.
    //
    WriteCommand(S6D0154_H_RAM_ADDR_REG);
    WriteData(MAPPED_X(lX, lY1));

    //
    // Set the starting Y address of the display cursor.
    //
    WriteCommand(S6D0154_V_RAM_ADDR_REG);
    WriteData(MAPPED_Y(lX, lY1));

    //
    // Write the data RAM write command.
    //
    WriteCommand(S6D0154_RAM_DATA_REG);

    //
    // Loop through the pixels of this vertical line.
    //
    while(lY1++ <= lY2)
    {
        //
        // Write the pixel value.
        //
        WriteData(ulValue);
    }
  
}

//*****************************************************************************
//
//! Fills a rectangle.
//!
//! \param pvDisplayData is a pointer to the driver-specific data for this
//! display driver.
//! \param pRect is a pointer to the structure describing the rectangle.
//! \param ulValue is the color of the rectangle.
//!
//! This function fills a rectangle on the display.  The coordinates of the
//! rectangle are assumed to be within the extents of the display, and the
//! rectangle specification is fully inclusive (in other words, both sXMin and
//! sXMax are drawn, along with sYMin and sYMax).
//!
//! \return None.
//
//*****************************************************************************
static void
Kitronix240x320x16_SD60154RectFill(void *pvDisplayData, const tRectangle *pRect,
                                  unsigned long ulValue)
{
  
    long lCount;

    //
    // Write the Y extents of the rectangle.
    //
    WriteCommand(S6D0154_ENTRY_MODE_REG);
    WriteData(MAKE_ENTRY_MODE(HORIZ_DIRECTION));

    //
    // Write the X extents of the rectangle.
    //
    WriteCommand(S6D0154_H_WINDOW_START_REG);
#if (defined PORTRAIT) || (defined LANDSCAPE)
    WriteData(MAPPED_X(pRect->sXMax, pRect->sYMax));
#else
    WriteData(MAPPED_X(pRect->sXMin, pRect->sYMin));
#endif

    WriteCommand(S6D0154_H_WINDOW_END_REG);
#if (defined PORTRAIT) || (defined LANDSCAPE)
    WriteData(MAPPED_X(pRect->sXMin, pRect->sYMin));
#else
    WriteData(MAPPED_X(pRect->sXMax, pRect->sYMax));
#endif

    //
    // Write the Y extents of the rectangle
    //
    WriteCommand(S6D0154_V_WINDOW_START_REG);
#if (defined LANDSCAPE_FLIP) || (defined PORTRAIT)
    WriteData(MAPPED_Y(pRect->sXMin, pRect->sYMin));
#else
    WriteData(MAPPED_Y(pRect->sXMax, pRect->sYMax));
#endif
     WriteCommand(S6D0154_V_WINDOW_END_REG);
#if (defined LANDSCAPE_FLIP) || (defined PORTRAIT)
    WriteData(MAPPED_Y(pRect->sXMax, pRect->sYMax));
#else
    WriteData(MAPPED_Y(pRect->sXMin, pRect->sYMin));
#endif
    
    //
    // Set the display cursor to the upper left of the rectangle (in application
    // coordinate space).
    //
    WriteCommand(S6D0154_H_RAM_ADDR_REG);
    WriteData(MAPPED_X(pRect->sXMin, pRect->sYMin));

    WriteCommand(S6D0154_V_RAM_ADDR_REG);
    WriteData(MAPPED_Y(pRect->sXMin, pRect->sYMin));

    //
    // Tell the controller we are about to write data into its RAM.
    //
    WriteCommand(S6D0154_RAM_DATA_REG);

    //
    // Loop through the pixels of this filled rectangle.
    //
    for(lCount = ((pRect->sXMax - pRect->sXMin + 1) *
                  (pRect->sYMax - pRect->sYMin + 1)); lCount >= 0; lCount--)
    {
        //
        // Write the pixel value.
        //
        WriteData(ulValue);
    }

    //
    // Reset the X extents to the entire screen.
    //
    WriteCommand(S6D0154_H_WINDOW_END_REG);
    WriteData(0x00ef);
    WriteCommand(S6D0154_H_WINDOW_START_REG);
    WriteData(0x0000);

    //
    // Reset the Y extent to the full screen
    //
    WriteCommand(S6D0154_V_WINDOW_END_REG);
    WriteData(0x013f);
    WriteCommand(S6D0154_V_WINDOW_START_REG);
    WriteData(0x0000);

}

//*****************************************************************************
//
//! Translates a 24-bit RGB color to a display driver-specific color.
//!將顏色轉換成RGB的值
//! \param pvDisplayData is a pointer to the driver-specific data for this
//! display driver.
//! \param ulValue is the 24-bit RGB color.  The least-significant byte is the
//! blue channel, the next byte is the green channel, and the third byte is the
//! red channel.
//!最低位為
//! This function translates a 24-bit RGB color into a value that can be
//! written into the display's frame buffer in order to reproduce that color,
//! or the closest possible approximation of that color.
//!
//! \return Returns the display-driver specific color.
//
//*****************************************************************************
static unsigned long
Kitronix240x320x16_SD60154ColorTranslate(void *pvDisplayData,
                                        unsigned long ulValue)
{
    //
    // Translate from a 24-bit RGB color to a 5-6-5 RGB color.
    //
    return(DPYCOLORTRANSLATE(ulValue));
}

//*****************************************************************************
//
//! Flushes any cached drawing operations.
//!
//! \param pvDisplayData is a pointer to the driver-specific data for this
//! display driver.
//!
//! This functions flushes any cached drawing operations to the display.  This
//! is useful when a local frame buffer is used for drawing operations, and the
//! flush would copy the local frame buffer to the display.  For the SSD2119
//! driver, the flush is a no operation.
//!
//! \return None.
//刷新
//*****************************************************************************
static void
Kitronix240x320x16_SD60154Flush(void *pvDisplayData)
{
    //
    // There is nothing to be done.
    //
}

//*****************************************************************************
//
//! The display structure that describes the driver for the Kitronix
//! K350QVG-V1-F TFT panel with an SSD2119 controller.
//
//*****************************************************************************
const tDisplay g_sKitronix320x240x16_SSD2119 =
{
    sizeof(tDisplay),
    0,
#if defined(PORTRAIT) || defined(PORTRAIT_FLIP)
    320,
    240,
#else
    240,
    320,
#endif
    Kitronix240x320x16_SD60154PixelDraw,
    Kitronix240x320x16_SD60154PixelDrawMultiple,
    Kitronix240x320x16_SD60154LineDrawH,
    Kitronix240x320x16_SD60154LineDrawV,
    Kitronix240x320x16_SD60154RectFill,
    Kitronix240x320x16_SD60154ColorTranslate,
    Kitronix240x320x16_SD60154Flush
};

//*****************************************************************************
//
// Close the Doxygen group.
//! @}
//
//*****************************************************************************