c/c++ 将 RGBQUAD 数组分配给位图 [英] c/c++ assign RGBQUAD array to a bitmap
问题描述
我正在做一个程序,您可以截取窗口的屏幕截图,然后扫描该图片的每个像素.但是我在将 RGBQUAD 数组分配给拍摄的屏幕时遇到了问题.每个像素都有相同的 RGB,即 205.这是我的一段代码:
i am doing a program where you take a screenshot of a window and then scan every pixel of that picture. But I have a problem assigning RGBQUAD array to the taken screen. Every pixel has the same RGB which is 205. Here is a piece of my code:
RGBQUAD *pixel = malloc((ssWidth * ssHeight)* sizeof(RGBQUAD));
hdcScreen = GetDC(gameHandle);
hdc = CreateCompatibleDC(hdcScreen);
hBmp = CreateCompatibleBitmap(hdcScreen, ssWidth, ssHeight);
SelectObject(hdc, hBmp);
BitBlt(hdc, 0, 0, ssWidth, ssHeight, hdcScreen, xCenter, yCenter, SRCCOPY);
GetDIBits(hdc, hBmp, 0, ssHeight, pixel, &bmpInfo, DIB_RGB_COLORS);
int p = -1;
for(y_var = 0; y_var < ssWidth; y_var++)
{
for(x_var = 0; x_var < ssHeight; x_var++)
{
if(ComparePixel(&pixel[++p]))
{
SetCursorPos(xCenter + x_var + 3, yCenter + y_var + 3);
}
}
}
bool ComparePixel(RGBQUAD *pixel)
{
printf("%d, %d, %d\n"; pixel -> rgbRed, pixel -> rgbGreen, pixel -> rgbBlue);
return false;
}
ComparePixel(RGBQUAD *pixel) 函数只检查 RGB 值.如何将 RGBQUAD 分配给屏幕截图的位图?
ComparePixel(RGBQUAD *pixel) function just checks the RGB values. How do i assign the RGBQUAD to the bitmap of the screenshot?
推荐答案
多个问题.
RGBQUAD **pixel = malloc(...
和free(*pixel)
似乎是问题所在.我想你想要RGBQUAD *pixel = malloc((ssWidth * ssHeight)* sizeof(RGBQUAD));
(只有1个*
)
The
RGBQUAD **pixel = malloc(...
andfree(*pixel)
appear to be the problem. I think you wantRGBQUAD *pixel = malloc((ssWidth * ssHeight)* sizeof(RGBQUAD));
(only 1*
)
怀疑 GetDIBits()
s/b pixel
中的 pixels
.
Suspect the pixels
in GetDIBits()
s/b pixel
.
我想你想要 y_var = 0;
(x_var = 0; also)
I think you want y_var = 0;
(x_var = 0; also)
ComparePixel()
未定义,但我认为您想要更接近于 if(ComparePixel(pixel[x_var+(y_var*ssWidth)], the_pixel_to_compare_against))代码>
ComparePixel()
is not defined, but I think you want something closer to if(ComparePixel(pixel[x_var+(y_var*ssWidth)], the_pixel_to_compare_against))
free(*pixel);
s/b _after 2 for 循环,应该是 free(pixel)
;
The free(*pixel);
s/b _after the 2 for loops and should be free(pixel)
;
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