[英]libpng: write a bigger png than 1002px
I'm currently writing a c++ program which should write me a png file as output. 我目前正在编写一个c ++程序,该程序应该将png文件写为输出。 So I made a little code, actually works.
所以我做了一点代码,实际上是可行的。 I just took the source code from here and condesed it.
我只是从这里获取了源代码并提出了建议。 My code is nopasted here .
我的代码在这里 。
BUT: It only works if it doesn't exceed 1002 pixels in width. 但是:仅当宽度不超过1002像素时,它才有效。 I am very sure the problem is somewhere around lines 29/30, so a malloc problem, but I don't get it.
我非常确定问题出在29/30行附近,所以是malloc问题,但我不明白。
Thanks for your help & greez 感谢您的帮助和问候
Without diving into the code too deeply, there are these interesting constants: 在不深入研究代码的情况下,有以下有趣的常量:
unsigned width = 1003;
unsigned height = 500;
int rowbytes = 4000;
The last one directly controls the amount of memory allocated. 最后一个直接控制分配的内存量。 Have you tried increasing this value?
您是否尝试增加此值?
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