我遇到过几次,并认为把它放在那里会很好。您最好的图像调整大小和/或裁剪逻辑是什么。想法是使用目标图像、尺寸和裁剪标志调用某些方法 - 这将返回或保存或任何所需的图像。
我的在下面。从 VB 转换为 C#,所以是的,会有一些小错误,但我们正在研究的是逻辑。
// INIT
// On/off
bool WeAreCropping = true;
// Get some dimensions
int TargetWidth = RequestedWidth;
int TargetHeight = RequestedHeight;
int SourceWidth = SourceImage.Width;
int SourceHeight = SourceImage.Height;
int ResizeWidth = TargetWidth;
int ResizeHeight = TargetHeight;
// GET RESIZE VALUES
// Are we cropping?
if (WeAreCropping) {
// Get source and target aspect ratio
double SourceAspectRatio = SourceWidth / SourceHeight;
double TargetAspectRatio = TargetWidth / TargetHeight;
// Compare aspect ratios to find out if we should we resize by
// width or height or nothing
if (TargetAspectRatio < SourceAspectRatio) {
ResizeWidth = TargetHeight / SourceHeight * SourceWidth;
}
else if (TargetAspectRatio > SourceAspectRatio) {
ResizeHeight = TargetWidth / SourceWidth * SourceHeight;
}
else {
// Same aspect ratio
}
}
else {
// If the target image is bigger than the source
if (TargetWidth > SourceWidth && TargetHeight > SourceHeight) {
TargetWidth = SourceWidth;
TargetHeight = SourceHeight;
}
double Ratio = 0;
// What ratio should we resize it by
if (SourceWidth / TargetWidth > SourceHeight / TargetHeight) {
Ratio = SourceWidth / TargetWidth;
}
else {
Ratio = SourceHeight / TargetHeight;
}
ResizeWidth = Math.Ceiling(SourceWidth / Ratio);
ResizeHeight = Math.Ceiling(SourceHeight / Ratio);
}
// TIME TO DO SUMFINK
// Resize the image using ResizeWidth and ResizeHeight
// Do it
if (WeAreCropping) {
// Crop the resized image at the center TargetWidth and TargetHeight
// Do it
}
我怀疑这可能会更优雅,所以也许你可以做得更好。