Initial commit

.gitignore

@@ -10,5 +10,6 @@ lib-cov
 pids
 logs
 results
+build
 
 npm-debug.log

.travis.yml

@@ -0,0 +1,9 @@
+language: node_js
+node_js:
+  - "0.11"
+  - "0.10"
+  - "0.8"
+before_install:
+ - sudo apt-get update -qq
+ - sudo apt-get install -qq libvips-dev
+ - sudo ln -s /usr/lib/pkgconfig/vips-7.26.pc /usr/lib/pkgconfig/vips.pc

README.md

@@ -1,4 +1,46 @@
-sharp
-=====
+# sharp (_adj_)
 
-High performance Node.js module to resize JPEG images using the libvips image processing library
+1. clearly defined; distinct: a sharp photographic image. 
+2. quick, brisk, or spirited. 
+3. shrewd or astute: a sharp bargainer. 
+4. (Informal.) very stylish: a sharp dresser; a sharp jacket. 
+
+The typical use case for this high performance Node.js module is to convert a large JPEG image to smaller JPEG images of varying dimensions.
+
+It is somewhat opinionated in that it only deals with JPEG images, always obeys the requested dimensions by either cropping or embedding and insists on a mild sharpen of the resulting image.
+
+Under the hood you'll find the blazingly fast [libvips](https://github.com/jcupitt/libvips) image processing library, originally created in 1989 at Birkbeck College and currently maintained by the University of Southampton.
+
+## Prerequisites
+
+Requires node-gyp and libvips-dev to build.
+
+	sudo npm install -g node-gyp
+	sudo apt-get install libvips-dev
+
+Requires vips-7.xx.pc (installed with libvips-dev) to be symlinked as /usr/lib/pkgconfig/vips.pc
+
+Ubuntu 12.04 LTS:
+
+	sudo ln -s /usr/lib/pkgconfig/vips-7.26.pc /usr/lib/pkgconfig/vips.pc
+
+Ubuntu 13.04:
+
+	sudo ln -s /usr/lib/x86_64-linux-gnu/pkgconfig/vips-7.28.pc /usr/lib/pkgconfig/vips.pc
+
+## Install
+
+	npm install sharp
+
+## Usage
+
+```javascript
+var sharp = require("sharp");
+var cropLandscape = sharp.resize("input.jpg", "output.jpg", 300, 200, "c");
+var embedPortraitWhiteBorder = sharp.resize("input.jpg", "output.jpg", 200, 300, "w");
+var embedPortraitBlackBorder = sharp.resize("input.jpg", "output.jpg", 200, 300, "b");
+```
+
+## Testing [![Build Status](https://travis-ci.org/lovell/sharp.png?branch=master)](https://travis-ci.org/lovell/sharp)
+
+	npm test

binding.gyp

@@ -0,0 +1,14 @@
+{
+  'targets': [{
+    'target_name': 'sharp',
+    'sources': ['src/sharp.cc'],
+    'libraries': ['<!@(PKG_CONFIG_PATH="/usr/lib/pkgconfig" pkg-config --libs glib-2.0 vips)'],
+    'include_dirs': [
+      '/usr/include/glib-2.0',
+      '/usr/lib/glib-2.0/include',
+      '/usr/lib/x86_64-linux-gnu/glib-2.0/include'
+    ],
+    'cflags': ['-fexceptions'],
+    'cflags_cc': ['-fexceptions']
+  }]
+}

package.json

@@ -0,0 +1,25 @@
+{
+  "name": "sharp",
+  "version": "0.0.1",
+  "main": "./build/Release/sharp",
+  "description": "High performance Node.js module to resize JPEG images using the libvips image processing library",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/lovell/sharp"
+  },
+  "engines": {
+    "node": "*"
+  },
+  "keywords": [
+    "jpeg",
+    "resize",
+    "thumbnail",
+	"sharpen",
+	"crop",
+	"embed",
+    "libvips",
+	"fast"
+  ],
+  "author": "Lovell Fuller",
+  "license": "Apache 2.0"
+}

src/sharp.cc

@@ -0,0 +1,173 @@
+#include <node.h>
+#include <math.h>
+#include <string>
+#include <vector>
+#include <vips/vips.h>
+
+using namespace v8;
+
+// Free VipsImage children when object goes out of scope
+// Thanks due to https://github.com/dosx/node-vips
+class ImageFreer {
+  public:
+    ImageFreer() {}
+    ~ImageFreer() {
+      for (uint16_t i = 0; i < v_.size(); i++) {
+        if (v_[i] != NULL) {
+          g_object_unref(v_[i]);
+        }
+      }
+      v_.clear();
+    }
+    void add(VipsImage* i) { v_.push_back(i); }
+  private:
+    std::vector<VipsImage*> v_;
+};
+
+struct ResizeBaton {
+  std::string src;
+  std::string dst;
+  int  cols;
+  int  rows;
+  bool crop;
+  int  embed;
+  std::string err;
+  Persistent<Function> callback;
+};
+
+void ResizeAsync(uv_work_t *work) {
+  ResizeBaton* baton = static_cast<ResizeBaton*>(work->data);
+
+  VipsImage *in = vips_image_new_mode((baton->src).c_str(), "p");
+  im_jpeg2vips((baton->src).c_str(), in);
+  if (in == NULL) {
+    (baton->err).append(vips_error_buffer());
+    vips_error_clear();
+    return;
+  }
+  ImageFreer freer;
+  freer.add(in);
+
+  VipsImage* img = in;
+  VipsImage* t[4];
+
+  if (im_open_local_array(img, t, 4, "temp", "p")) {
+    (baton->err).append(vips_error_buffer());
+    vips_error_clear();
+    return;
+  }
+
+  double xfactor = static_cast<double>(img->Xsize) / std::max(baton->cols, 1);
+  double yfactor = static_cast<double>(img->Ysize) / std::max(baton->rows, 1);
+  double factor = baton->crop ? std::min(xfactor, yfactor) : std::max(xfactor, yfactor);
+  factor = std::max(factor, 1.0);
+  int shrink = floor(factor);
+  double residual = shrink / factor;
+
+  // Use im_shrink with the integral reduction
+  if (im_shrink(img, t[0], shrink, shrink)) {
+    (baton->err).append(vips_error_buffer());
+    vips_error_clear();
+    return;
+  }
+
+  // Use im_affinei with the remaining float part using bilinear interpolation
+  if (im_affinei_all(t[0], t[1], vips_interpolate_bilinear_static(), residual, 0, 0, residual, 0, 0)) {
+    (baton->err).append(vips_error_buffer());
+    vips_error_clear();
+    return;
+  }
+  img = t[1];
+
+  if (baton->crop) {
+    int width = std::min(img->Xsize, baton->cols);
+    int height = std::min(img->Ysize, baton->rows);
+    int left = (img->Xsize - width + 1) / 2;
+    int top = (img->Ysize - height + 1) / 2;
+    if (im_extract_area(img, t[2], left, top, width, height)) {
+      (baton->err).append(vips_error_buffer());
+      vips_error_clear();
+      return;
+    }
+    img = t[2];
+  } else {
+    int left = (baton->cols - img->Xsize) / 2;
+    int top = (baton->rows - img->Ysize) / 2;
+    if (im_embed(img, t[2], baton->embed, left, top, baton->cols, baton->rows)) {
+      (baton->err).append(vips_error_buffer());
+      vips_error_clear();
+      return;
+    }
+    img = t[2];
+  }
+
+  // Mild sharpen
+  INTMASK* sharpen = im_create_imaskv("sharpen", 3, 3,
+    -1, -1, -1,
+    -1, 32, -1,
+    -1, -1, -1);
+  sharpen->scale = 24;
+  if (im_conv(img, t[3], sharpen)) { 
+    (baton->err).append(vips_error_buffer());
+    vips_error_clear();
+    return;
+  }
+  img = t[3];
+
+  if (im_vips2jpeg(img, baton->dst.c_str())) {
+    (baton->err).append(vips_error_buffer());
+    vips_error_clear();
+  }  
+}
+
+void ResizeAsyncAfter(uv_work_t *work, int status) {
+  HandleScope scope;
+
+  ResizeBaton *baton = static_cast<ResizeBaton*>(work->data);
+
+  Local<Value> argv[1];
+  if (!baton->err.empty()) {
+    argv[0] = String::New(baton->err.data(), baton->err.size());
+  } else {
+    argv[0] = Local<Value>::New(Null());
+  }
+
+  baton->callback->Call(Context::GetCurrent()->Global(), 1, argv);
+  baton->callback.Dispose();
+  delete baton;
+  delete work;
+}
+
+Handle<Value> Resize(const Arguments& args) {
+  HandleScope scope;
+  
+  ResizeBaton *baton = new ResizeBaton;
+  baton->src = *String::Utf8Value(args[0]->ToString());
+  baton->dst = *String::Utf8Value(args[1]->ToString());
+  baton->cols = args[2]->Int32Value();
+  baton->rows = args[3]->Int32Value();
+  Local<String> canvas = args[4]->ToString();
+  if (canvas->Equals(String::NewSymbol("c"))) {
+	baton->crop = true;
+  } else if (canvas->Equals(String::NewSymbol("w"))) {
+    baton->crop = false;
+    baton->embed = 4;
+  } else if (canvas->Equals(String::NewSymbol("b"))) {
+    baton->crop = false;
+    baton->embed = 0;
+  }	
+  baton->callback = Persistent<Function>::New(Local<Function>::Cast(args[5]));
+
+  uv_work_t *work = new uv_work_t;
+  work->data = baton;
+  uv_queue_work(uv_default_loop(), work, ResizeAsync, (uv_after_work_cb)ResizeAsyncAfter);
+  return Undefined();
+}
+
+extern "C" void init(Handle<Object> target) {
+  HandleScope scope;
+  vips_init("");
+  NODE_SET_METHOD(target, "resize", Resize);
+};
+
+NODE_MODULE(vips, init)