读取 Targa 文件。缺少深色？
由于是新人，我只能有两个链接，无法发布我的图片。抱歉，复制+粘贴地址给您带来不便
我正在解析 Targa (.tga) 图像文件，其代码类似于 steinsoft.net/index.php?site=Programming/Code% 中找到的代码20Snippets/Cpp/no8
将数据检索到 unsigned char 数组后，我将其打印到日志中以进行手动检查。似乎无论出于何种原因，深色颜色都没有被解析。
简单打印代码
file.open( save );
//using while( tga.data[ i ] != NULL ) resulted in ~400,000 lines of garbage being appended
for( unsigned i = 1; i <= ( tga.width * tga.height * tga.byteCount ); i++ )
{
if( tga.data[ i ] == NULL )
break;
file << ( int )tga.data[ i ] << ",";
if( ( i % 3 ) == 0 )
file << "\n";
}
file.close( );
示例
Dark : https://i.sstatic.net/qefIA.png : http://pastebin.com/8JeJwP2w
浅色：https://i.sstatic.net/XNTIK.png ： http://pastebin.com/s2sW0XfM
如您所见，图像顶部的线不是当它是深色（在本例中为黑色）时包括在内，但当它是浅色（粉红色[255,53,204]）时它就存在。
有谁知道为什么会发生这种情况？
规格
Windows Vista
Microsoft Visual C++ 2010 Professional
Targa 保存为 24 位未压缩。
Due to being new, I can only have two links and can not post my images. Sorry for the inconvenience of having to copy+paste addresses
I am parsing a Targa (.tga) image file with code similar to that found at steinsoft.net/index.php?site=Programming/Code%20Snippets/Cpp/no8
After retrieving the data into the unsigned char array, I print it out into a log to check manually. It seems that darker colors are not being parsed for whatever reason.
The Simple Print Code
file.open( save );
//using while( tga.data[ i ] != NULL ) resulted in ~400,000 lines of garbage being appended
for( unsigned i = 1; i <= ( tga.width * tga.height * tga.byteCount ); i++ )
{
if( tga.data[ i ] == NULL )
break;
file << ( int )tga.data[ i ] << ",";
if( ( i % 3 ) == 0 )
file << "\n";
}
file.close( );
Example
Dark : https://i.sstatic.net/qefIA.png : http://pastebin.com/8JeJwP2w
Light : https://i.sstatic.net/XNTIK.png : http://pastebin.com/s2sW0XfM
As you can see, the line at the top of the image is not included when it is a dark color (black in this instance), but it is there when it is light (a pink [255,53,204]).
Does anyone have any information on why this may be happening?
Specs
Windows Vista
Microsoft Visual C++ 2010 Professional
Targa is saved as 24-bit NOT compressed.
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评论（1）
首先，为什么要检查
data[i]==NULL？可能有 0 像素（黑色），所以将它们全部保留。您基本上检查颜色是否为 0，然后退出循环。无论值如何，只需读取所有像素即可。First of all, why do you check if the
data[i]==NULL? There might be 0-pixels (black), so keep them all in. You basically check if the color is 0 and then you exit your loop. Just read all pixels no matter the value.