CxImage 获取PNG透明值

yigerengudu

if (!pxImage->Load ("C:\\PNG\\0021.png", CXIMAGE_FORMAT_PNG)) { delete pxImage; pxImage = NULL; } //打开成功，可以进行显示 //但是，为什么如下方式不能获得一像素的RGB分值和透明值呢？大家帮帮忙呀. BYTE byteR; BYTE byteG; BYTE byteB; USHORT nR; USHORT nG; USHORT nB; byteR = (BYTE)rgb.rgbRed; byteG = (BYTE)rgb.rgbGreen; byteB = (BYTE)rgb.rgbBlue; nR = (USHORT)byteR; nG = (USHORT)byteG; nB = (USHORT)byteB; pxImage->GetPixelColor (1, 1, true); sprintf (buf, "%f %d %d %d", nR, nG, nB); MessageBox (buf); /*CxImage中的Decode解压是不是如下用法，有什么用呢，为什么如下方法总是失败.("Fail to decode!"); FILE *pf = fopen ("C:\\PNG\\0021.png", "r" ); if (pf == NULL) { MessageBox ("Fail to open fiel!"); return ; } if (!pxImage->Decode (pf, CXIMAGE_FORMAT_PNG)) { MessageBox ("Fail to decode!"); return; } */

鼯鼠

<p><strong>CxImage</strong>用的很早了有些记不清了<strong>，</strong>处理PNG效果不是很好，不过GDI+是一个不错的解决方案，支持半透明非常好，简单易用</p>

[此贴子已经被作者于2007-6-26 18:06:11编辑过]