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Improve min/max docs, thanks @LinusU

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Add requirement for C++11 compiler

Init scaling factor to silence compiler warning
This commit is contained in:
Lovell Fuller 2015-02-27 13:49:16 +00:00
parent 88753a6333
commit 77bbbb9715
2 changed files with 15 additions and 5 deletions
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17
README.md
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@ -31,8 +31,9 @@ This module is powered by the blazingly fast [libvips](https://github.com/jcupit
### Prerequisites
* Node.js v0.10+
* Node.js v0.10+ or io.js
* [libvips](https://github.com/jcupitt/libvips) v7.40.0+ (7.42.0+ recommended)
* C++11 compatible compiler such as gcc 4.6+ or clang 3.0+
To install the most suitable version of libvips on the following Operating Systems:
@ -328,13 +329,23 @@ Possible values are `north`, `east`, `south`, `west`, `center` and `centre`. The
#### max()
Preserving aspect ratio, resize the image to the maximum `width` or `height` specified.
Preserving aspect ratio,
resize the image to be as large as possible
while ensuring its dimensions are less than or equal to
the `width` and `height` specified.
This is equivalent to using the `contain` value of the CSS `background-size` property.
Both `width` and `height` must be provided via `resize` otherwise the behaviour will default to `crop`.
#### min()
Preserving aspect ratio, resize the image to the minimum `width` or `height` specified.
Preserving aspect ratio,
resize the image to be as small as possible
while ensuring its dimensions are greater than or equal to
the `width` and `height` specified.
This is equivalent to using the `cover` value of the CSS `background-size` property.
Both `width` and `height` must be provided via `resize` otherwise the behaviour will default to `crop`.

3
src/resize.cc
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@ -248,7 +248,7 @@ class ResizeWorker : public NanAsyncWorker {
int interpolatorWindowSize = InterpolatorWindowSize(baton->interpolator.c_str());
// Scaling calculations
double factor;
double factor = 1.0;
if (baton->width > 0 && baton->height > 0) {
// Fixed width and height
double xfactor = static_cast<double>(inputWidth) / static_cast<double>(baton->width);
@ -287,7 +287,6 @@ class ResizeWorker : public NanAsyncWorker {
baton->width = floor(static_cast<double>(inputWidth) / factor);
} else {
// Identity transform
factor = 1;
baton->width = inputWidth;
baton->height = inputHeight;
}