Mathis/sharp
1
0
Fork 0
mirror of https://github.com/lovell/sharp.git synced 2025-12-19 07:15:08 +01:00
Code Issues Packages Projects Releases Wiki Activity

Add support for auto-scaling of width and height

Browse Source
This commit is contained in:
Lovell Fuller
2014-03-03 23:24:09 +00:00
parent 9b4387be97
commit f99e42d447
6 changed files with 71 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
src/sharp.cc
View File

@@ -15,8 +15,8 @@ struct resize_baton {
std::string file_out;
void* buffer_out;
size_t buffer_out_len;
int width;
int height;
int width;
int height;
bool crop;
VipsExtend extend;
bool sharpen;
@@ -119,7 +119,24 @@ void resize_async(uv_work_t *work) {
double xfactor = static_cast<double>(in->Xsize) / std::max(baton->width, 1);
double yfactor = static_cast<double>(in->Ysize) / std::max(baton->height, 1);
double factor = baton->crop ? std::min(xfactor, yfactor) : std::max(xfactor, yfactor);
double factor;
if (baton->width > 0 && baton->height > 0) {
// Fixed width and height
factor = baton->crop ? std::min(xfactor, yfactor) : std::max(xfactor, yfactor);
} else if (baton->width > 0) {
// Fixed width, auto height
factor = xfactor;
baton->height = floor(in->Ysize * factor);
} else if (baton->height > 0) {
// Fixed height, auto width
factor = yfactor;
baton->width = floor(in->Xsize * factor);
} else {
resize_error(baton, in);
(baton->err).append("Width and/or height required");
return;
}
factor = std::max(factor, 1.0);
int shrink = floor(factor);
double residual = shrink / factor;