把一个tile数据铺满一个与屏幕大小相同的缓冲

#define SCREEN_WIDTH 240

#define SCREEN_HEIGHT 320

/**

函数功能：把一个tile铺满一个与屏幕大小相同的缓冲区，

然后把缓冲区数据数据绘制到屏幕上

*/

void tileToBufToScreen(char *tileData, int tileWidth, int tileHeight)

{

int16 i = 0;

int16 j = 0;

int16 x = 0;

int16 y = 0;

int16 dy;

int row;

int col;

char *srcBuf, *destBuf;

int32 memcpyNum;

if (tileData == NULL || titleWidth <= 0 || titleHeight <= 0)

{

return;

}

/** 为缓冲区分配内存 */

destBufTemp = (char *)malloc(sizeof(char) * 2 * SCREEN_WIDTH * SCREEN_HEIGHT);

if (destBufTemp == NULL)

{

return;

}

memset((char *)destBufTemp, 0, sizeof(char) * 2 * SCREEN_WIDTH * SCREEN_HEIGHT);

memcpyNum = titleWidth << 1; /** 拷贝图片的一行数据，需要拷贝的字节数 */

row = SCREEN_HEIGHT / titleHeight; /** 需要拷贝的行数 */

col = SCREEN_WIDTH / titleWidth; /** 需要拷贝的列数 */

/* 把地表数据拷贝到缓冲区中 */

for (i = 0; i < row; ++i)

{

/* 依次拷贝一个图块 */

for (j = 0; j < col; ++j)

{

x = j * titleWidth;

y = i * titleHeight;

destBuf = destBufTemp + y * SCREEN_WIDTH * 2 + x * 2;

srcBuf = (char *)tileData;

for (dy = y; dy < y + titleHeight; ++dy) /** 逐行进行拷贝 */

{

memcpy(destBuf, srcBuf, memcpyNum);

destBuf += SCREEN_WIDTH * 2;

srcBuf += titleWidth * 2;

}

}

}

/* 将缓冲中的内存显示到屏幕上 */

BufToScreen((uint16 *)destBufTemp, 0, 0, 240, 240, 320, BM_COPY, 0, 0);

}