for (a = a1; a < a2; a += PI / 360)
	{
		for (int r = 0; r < LIGHT_R; r++)
		{
			x = (int)(_x + r * cos(a));
			y = (int)(_y + r * sin(a));
			if (x <= 0 || x >= WIDTH || y <= 0 || y >= HEIGHT - 1)
				break;
			if (bufImage[y * WIDTH + x])//真 白色
				break;
			bufScreen[y * WIDTH + x] += 0x202000;//淡黄色
		}
	}

我在一个地方学的这个if语句，直接就可以判断这个点是否为白色，但是我调试以后得到的结果是，不管这个点是什么颜色，他的布尔值都是true，也就是说if语句下的break都会运行，这有什么办法解决呢？

DWORD* bufImage;
void GameInit()
{
	loadimage(&image, L"mama.png.png",700,700);
	bufScreen = GetImageBuffer();
	bufImage = GetImageBuffer(&image);

之前的操作也就是定义这个指针，然后读取图像信息

备注：我使用的VS2019,easyx.h库，C++

这是源码：

#include<stdio.h>
#include<easyx.h>
#include<math.h>
#pragma comment(lib,"winmm.lib")
#define PI 3.1415926
#define WIDTH 700
#define HEIGHT 700
#define LIGHT_A (PI/3)
#define LIGHT_R 120
const POINT exitpt = { 660,680 };
IMAGE image;
POINT player;
POINT mouse;
bool isBegin; 
DWORD* bufScreen;
DWORD* bufImage;
void GameInit()
{
	loadimage(&image, L"mama.png.png",700,700);
	bufScreen = GetImageBuffer();
	bufImage = GetImageBuffer(&image);
	player.x = 22;
	player.y = 30;
	/*player.x = 68;
	player.y = 68;*/
	mouse.x = 100;
	mouse.y = 100;
	isBegin = false;
}
void LithtDarw(int _x,int _y,double _a)
{
	int x, y;
	double a;
	double a1 = _a - LIGHT_A / 2;
	double a2 = _a + LIGHT_A / 2;
	for (a = a1; a < a2; a += PI / 360)
	{
		for (int r = 0; r < LIGHT_R; r++)
		{
			x = (int)(_x + r * cos(a));
			y = (int)(_y + r * sin(a));
			if (x <= 0 || x >= WIDTH || y <= 0 || y >= HEIGHT - 1)
				break;
			if (bufImage[y * WIDTH + x])//真 白色
				break;
			bufScreen[y * WIDTH + x] += 0x202000;//淡黄色
		}
	}
}
void GameDraw()//绘制界面
{
	BeginBatchDraw();
	cleardevice();
	if(!isBegin)//关灯
		putimage(0, 0, &image);
	outtextxy(exitpt.x, exitpt.y, L"EXIT");
	solidcircle(player.x, player.y, 5);
	if (isBegin)
	{
		double dx, dy, a;
		dx = mouse.x - player.x;
		dy = mouse.y - player.y;
		if (dx == 0 && dy == 0)
			a = 0;
		else if (dx != 0 && dy != 0)
			a = atan(dy / dx);
		else if (dx == 0)
			a = dy > 0 ? PI / 2 : PI * 3 / 2;
		else
			a = 0;
		if (dx < 0)a += PI;
		if (a < 0)a += PI * 2;
		LithtDarw(player.x, player.y, a);
	}
	EndBatchDraw();
} 
void UpdatePlayer()
{
	if (GetAsyncKeyState(VK_LEFT))
	{
		int i = (player.y - 5)*WIDTH+(player.x - 6);//左上角的点
		int j;
		for (j = 0; j < 10; j++, i += WIDTH)//左边一列
		{
			if (bufImage[i])//是否为白色
				break;
		}
		if (j == 10)
				player.x--;
	}
	if (GetAsyncKeyState(VK_RIGHT))
	{/*
		int i = (player.x - 5) * WIDTH + (player.x - 6);
		int j;
		for (j = 0; j < 10; j++, i += WIDTH)
			if (bufImage[i])
				break;
		if (j == 10)*/
			player.x++;
	}
	if (GetAsyncKeyState(VK_UP))
	{
		/*int i = (player.y - 5) * HEIGHT + (player.y - 6);
		int j;
		for (j = 0; j < 10; j++, i += HEIGHT)
			if (bufImage[i])
				break;
		if (j == 10)*/
			player.y--;
	}
	if (GetAsyncKeyState(VK_DOWN))
	{
		/*int i = (player.y - 5) * HEIGHT + (player.y - 6);
		int j;
		for (j = 0; j < 10; j++, i += HEIGHT)
			if (bufImage[i])
				break;
		if (j == 10)*/
			player.y++;
	}
	ExMessage m;
	while (peekmessage(&m, EX_MOUSE, PM_NOREMOVE))
	{
		m = getmessage(EX_MOUSE);
		m.message == WM_MOUSEMOVE;
		mouse.x = m.x;
		mouse.y = m.y;
	}
}
int main()
{  
	initgraph(WIDTH, HEIGHT);
	GameInit();
	int time[7] = { 1000,50,500,50,50,50,50 };
	for (int i = 0; i < 7; i++)
	{
		if (i % 2 == 0)
			GameDraw();
		else
			cleardevice();
		Sleep(time[i]);
	}
	for (int i = 255; i >= 0; i -= 5)
	{
		for (int y = 0; y < HEIGHT; y++)
		{
			for (int x = 0; x < WIDTH; x++)
			{
				if (bufScreen[y * WIDTH + x] > 0)//不是黑色
				{
					bufScreen[y * WIDTH + x] -= 0x050505;
				}
			}
		}
		FlushBatchDraw();
		Sleep(20);
	}
	PlaySound(L"lau.wav", NULL, SND_ASYNC | SND_FILENAME);
	isBegin = true;
	while (1)
	{
		GameDraw();
		UpdatePlayer();
		Sleep(20);//速度
	}
	GameDraw();
	system("pause");
	return 0;
}

效果就是一个迷宫游戏，开始闪烁几次后会关灯，玩家有一个手电筒，抵达终点