2 qianrushi521 qianrushi521 于 2015.06.22 20:02 提问

arm开发板lcd屏幕中怎么把一个图片的颜色改变另一个颜色

以下是lcd的程序,求大神指教

/**************************************************************
The initial and control for 640×480 16Bpp TFT LCD----VGA
**************************************************************/

#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"

extern const unsigned char sunflower_240x320[];
extern const unsigned char sunflower_800x480[];
extern const unsigned char sunflower_1024x768[];
extern const unsigned char sunflower_640x480[];

#define LCD_XSIZE LCD_WIDTH
#define LCD_YSIZE LCD_HEIGHT
#define SCR_XSIZE LCD_WIDTH
#define SCR_YSIZE LCD_HEIGHT

volatile static unsigned short LCD_BUFFER[SCR_YSIZE][SCR_XSIZE];

/**************************************************************
640×480 TFT LCD数据和控制端口初始化
**************************************************************/
static void Lcd_Port_Init( void )
{
rGPCUP=0xffffffff; // Disable Pull-up register
rGPCCON=0xaaaa02a8; //Initialize VD[7:0],VM,VFRAME,VLINE,VCLK

rGPDUP=0xffffffff; // Disable Pull-up register
rGPDCON=0xaaaaaaaa; //Initialize VD[15:8]

}

/**************************************************************
640×480 TFT LCD功能模块初始化
**************************************************************/
static void LCD_Init(void)
{
#define M5D(n) ((n)&0x1fffff)
#define LCD_ADDR ((U32)LCD_BUFFER)
rLCDCON1 = (LCD_PIXCLOCK << 8) | (3 << 5) | (12 << 1);
rLCDCON2 = (LCD_UPPER_MARGIN << 24) | ((LCD_HEIGHT - 1) << 14) | (LCD_LOWER_MARGIN << 6) | (LCD_VSYNC_LEN << 0);
rLCDCON3 = (LCD_RIGHT_MARGIN << 19) | ((LCD_WIDTH - 1) << 8) | (LCD_LEFT_MARGIN << 0);
rLCDCON4 = (13 << 8) | (LCD_HSYNC_LEN << 0);

#if !defined(LCD_CON5)
#define LCD_CON5 ((1<<11) | (1 << 9) | (1 << 8) | (1 << 3) | (1 << 0))
#endif
rLCDCON5 = LCD_CON5;

rLCDSADDR1 = ((LCD_ADDR >> 22) << 21) | ((M5D(LCD_ADDR >> 1)) <<  0);
rLCDSADDR2 = M5D((LCD_ADDR + LCD_WIDTH * LCD_HEIGHT * 2) >> 1);
rLCDSADDR3 = LCD_WIDTH;        

rLCDINTMSK |= 3;
rTCONSEL   &= (~7);


rTPAL     = 0x0;
rTCONSEL &= ~((1<<4) | 1);

}

/**************************************************************
LCD视频和控制信号输出或者停止,1开启视频输出
**************************************************************/
static void Lcd_EnvidOnOff(int onoff)
{
if(onoff==1)
rLCDCON1|=1; // ENVID=ON
else
rLCDCON1 =rLCDCON1 & 0x3fffe; // ENVID Off
}

/**************************************************************
320×240 8Bpp TFT LCD 电源控制引脚使能
**************************************************************/
static void Lcd_PowerEnable(int invpwren,int pwren)
{
//GPG4 is setted as LCD_PWREN
rGPGUP = rGPGUP|(1<<4); // Pull-up disable
rGPGCON = rGPGCON|(3<<8); //GPG4=LCD_PWREN

//Enable LCD POWER ENABLE Function
rLCDCON5 = rLCDCON5&(~(1<<3))|(pwren<<3);   // PWREN
rLCDCON5 = rLCDCON5&(~(1<<5))|(invpwren<<5);   // INVPWREN

}

/**************************************************************
640×480 TFT LCD单个象素的显示数据输出
**************************************************************/
static void PutPixel(U32 x,U32 y,U16 c) //U16代表unsigned short U32代表unsigned int
{
if(x<SCR_XSIZE && y<SCR_YSIZE)
LCD_BUFFER[(y)][(x)] = c;
}

/**************************************************************
640×480 TFT LCD全屏填充特定颜色单元或清屏
**************************************************************/
static void Lcd_ClearScr( U16 c)
{
unsigned int x,y ;

for( y = 0 ; y < SCR_YSIZE ; y++ )
{
    for( x = 0 ; x < SCR_XSIZE ; x++ )
    {
        LCD_BUFFER[y][x] = c ;
    }
}

}

/**************************************************************
LCD屏幕显示垂直翻转
// LCD display is flipped vertically
// But, think the algorithm by mathematics point.
// 3I2
// 4 I 1
// --+-- <-8 octants mathematical cordinate
// 5 I 8
// 6I7
**************************************************************/
static void Glib_Line(int x1,int y1,int x2,int y2, U16 color)
{
int dx,dy,e;
dx=x2-x1;
dy=y2-y1;

if(dx>=0)
{
    if(dy >= 0) // dy>=0
    {
        if(dx>=dy) // 1/8 octant
        {
            e=dy-dx/2;
            while(x1<=x2)
            {
                PutPixel(x1,y1,color);
                if(e>0){y1+=1;e-=dx;}   
                x1+=1;
                e+=dy;
            }
        }
        else        // 2/8 octant
        {
            e=dx-dy/2;
            while(y1<=y2)
            {
                PutPixel(x1,y1,color);
                if(e>0){x1+=1;e-=dy;}   
                y1+=1;
                e+=dx;
            }
        }
    }
    else           // dy<0
    {
        dy=-dy;   // dy=abs(dy)

        if(dx>=dy) // 8/8 octant
        {
            e=dy-dx/2;
            while(x1<=x2)
            {
                PutPixel(x1,y1,color);
                if(e>0){y1-=1;e-=dx;}   
                x1+=1;
                e+=dy;
            }
        }
        else        // 7/8 octant
        {
            e=dx-dy/2;
            while(y1>=y2)
            {
                PutPixel(x1,y1,color);
                if(e>0){x1+=1;e-=dy;}   
                y1-=1;
                e+=dx;
            }
        }
    }   
}
else //dx<0
{
    dx=-dx;     //dx=abs(dx)
    if(dy >= 0) // dy>=0
    {
        if(dx>=dy) // 4/8 octant
        {
            e=dy-dx/2;
            while(x1>=x2)
            {
                PutPixel(x1,y1,color);
                if(e>0){y1+=1;e-=dx;}   
                x1-=1;
                e+=dy;
            }
        }
        else        // 3/8 octant
        {
            e=dx-dy/2;
            while(y1<=y2)
            {
                PutPixel(x1,y1,color);
                if(e>0){x1-=1;e-=dy;}   
                y1+=1;
                e+=dx;
            }
        }
    }
    else           // dy<0
    {
        dy=-dy;   // dy=abs(dy)

        if(dx>=dy) // 5/8 octant
        {
            e=dy-dx/2;
            while(x1>=x2)
            {
                PutPixel(x1,y1,color);
                if(e>0){y1-=1;e-=dx;}   
                x1-=1;
                e+=dy;
            }
        }
        else        // 6/8 octant
        {
            e=dx-dy/2;
            while(y1>=y2)
            {
                PutPixel(x1,y1,color);
                if(e>0){x1-=1;e-=dy;}   
                y1-=1;
                e+=dx;
            }
        }
    }   
}

}

/**************************************************************
在LCD屏幕上用颜色填充一个矩形
**************************************************************/
static void Glib_FilledRectangle(int x1,int y1,int x2,int y2, U16 color)
{
int i;

for(i=y1;i<=y2;i++)
Glib_Line(x1,i,x2,i,color);

}

/**************************************************************
在LCD屏幕上用颜色填充一个圆
**************************************************************/
static void Lcd_Circle(int r)
{
int m,n;
for(m=0;m<10000;m++)
{
for(n=0;n<1000;n++)
{
if((m-120)*(m-120)+(n-170)*(n-170)<=r*r)
{

PutPixel(m,n,600);

        }
    }
}

}
/**************************************************************
在LCD屏幕上指定坐标点画一条指定长度的直线
**************************************************************/

static void Lcd_Line(int t)
{
int m;
for(m=50;m<=t;m++)
{
PutPixel(90,m,600);
}
}

/**************************************************************
在LCD屏幕上指定坐标点画一个指定大小的图片
**************************************************************/
static void Paint_Bmp(int x0,int y0,int h,int l,const unsigned char *bmp)
{
int x,y;
U32 c;
int p = 0;

for( y = 0 ; y < l ; y++ )
{
    for( x = 0 ; x < h ; x++ )
    {
        c = bmp[p+1] | (bmp[p]<<8) ;

        if ( ( (x0+x) < SCR_XSIZE) && ( (y0+y) < SCR_YSIZE) )
            LCD_BUFFER[y0+y][x0+x] = c ;

        p = p + 2 ;
    }
}

}

/**************************************************************
**************************************************************/
void TFT_LCD_Init(void)
{

LCD_Init();
//LcdBkLtSet( 70 ) ;
Lcd_PowerEnable(0, 1);
Glib_FilledRectangle(40,50,80,100,300);
Lcd_EnvidOnOff(1);      //turn on vedio

/* Lcd_ClearScr( (0x00<<11) | (0x00<<5) | (0x00) );

#if defined(LCD_N35) || defined(LCD_T35) || defined(LCD_X35)
Paint_Bmp(0, 0, 240, 320, sunflower_240x320);
#elif defined(LCD_A70)
Paint_Bmp(0, 0, 800, 480, sunflower_800x480);
#elif defined(LCD_L80)
Paint_Bmp(0, 0, 640, 480, sunflower_640x480);
#elif defined(LCD_VGA1024768)
Paint_Bmp(0, 0, 1024, 768, sunflower_1024x768);
#endif */

}

/**************************************************************
**************************************************************/
void TFT_LCD_Test()
{

Lcd_Port_Init();// TFT LCD数据和控制端口初始化
LCD_Init();//TFT LCD功能模块初始化

Lcd_PowerEnable(0, 1);// 8Bpp TFT LCD 电源控制引脚使能
//Glib_FilledRectangle(20,30,200,200,500);//矩形
Lcd_Circle(100);
//Lcd_Line(150);

Lcd_EnvidOnOff(1);      //turn on vedio   LCD视频和控制信号输出或者停止,1开启视频输出

}
//*************************************************************

1个回答

u011960015
u011960015   2015.11.30 17:22

把c的值改了就可以改变颜色,要显示简单图案可以按一定方法渐变c的值,要显示某图片,把图片转换成像素色彩数组,循环写入

LCD_BUFFER[(y)][(x)] = c;
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