Merge branch 'mcuelenaere-imagemagick-buffer'

.jshintrc

@@ -2,7 +2,7 @@
   "strict": true,
   "node": true,
   "maxparams": 4,
-  "maxcomplexity": 11,
+  "maxcomplexity": 13,
   "globals": {
     "describe": true,
     "it": true

index.js

@@ -83,11 +83,13 @@ var Sharp = function(input) {
       (input[0] === 0x52 && input[1] === 0x49) ||
       // TIFF
       (input[0] === 0x4D && input[1] === 0x4D && input[2] === 0x00 && (input[3] === 0x2A || input[3] === 0x2B)) ||
-      (input[0] === 0x49 && input[1] === 0x49 && (input[2] === 0x2A || input[2] === 0x2B) && input[3] === 0x00)
+      (input[0] === 0x49 && input[1] === 0x49 && (input[2] === 0x2A || input[2] === 0x2B) && input[3] === 0x00) ||
+      // GIF
+      (input[0] === 0x47 && input[1] === 0x49 && input[2] === 0x46 && input[3] === 0x38 && (input[4] === 0x37 || input[4] === 0x39) && input[5] === 0x61)
     ) {
       this.options.bufferIn = input;
     } else {
-      throw new Error('Buffer contains an unsupported image format. JPEG, PNG, WebP and TIFF are currently supported.');
+      throw new Error('Buffer contains an unsupported image format. JPEG, PNG, WebP, TIFF and GIF are currently supported.');
     }
   } else {
     // input=stream

src/common.cc

@@ -43,6 +43,15 @@ namespace sharp {
     );
   }
 
+  static bool buffer_is_gif(char *buffer, size_t len) {
+    return (
+      len >= 6 && (
+          (buffer[0] == 'G' && buffer[1] == 'I' && buffer[2] == 'F' &&
+            buffer[3] == '8' && (buffer[4] == '7' || buffer[4] == '9') && buffer[5] == 'a')
+        )
+    );
+  }
+
   /*
     Determine image format of a buffer.
   */
@@ -57,6 +66,8 @@ namespace sharp {
         imageType = ImageType::WEBP;
       } else if (buffer_is_tiff(static_cast<char*>(buffer), length)) {
         imageType = ImageType::TIFF;
+      } else if (buffer_is_gif(static_cast<char*>(buffer), length)) {
+        imageType = ImageType::MAGICK;
       }
     }
     return imageType;
@@ -75,6 +86,10 @@ namespace sharp {
       vips_webpload_buffer(buffer, length, &image, "access", access, NULL);
     } else if (imageType == ImageType::TIFF) {
       vips_tiffload_buffer(buffer, length, &image, "access", access, NULL);
+#if (VIPS_MAJOR_VERSION >= 8)
+    } else if (imageType == ImageType::MAGICK) {
+      vips_magickload_buffer(buffer, length, &image, "access", access, NULL);
+#endif
     }
     return image;
   }

src/resize.cc

@@ -661,7 +661,7 @@ class ResizeWorker : public NanAsyncWorker {
       }
     }
 
-#if !(VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 40 && VIPS_MINOR_VERSION >= 5)
+#if !(VIPS_MAJOR_VERSION >= 8 || (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 40 && VIPS_MINOR_VERSION >= 5))
     // Generate image tile cache when interlace output is required - no longer required as of libvips 7.40.5+
     if (baton->progressive) {
       VipsImage *cached;
@@ -683,7 +683,7 @@ class ResizeWorker : public NanAsyncWorker {
       }
       baton->outputFormat = "jpeg";
     } else if (baton->output == "__png" || (baton->output == "__input" && inputImageType == ImageType::PNG)) {
-#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42)
+#if (VIPS_MAJOR_VERSION >= 8 || (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42))
       // Select PNG row filter
       int filter = baton->withoutAdaptiveFiltering ? VIPS_FOREIGN_PNG_FILTER_NONE : VIPS_FOREIGN_PNG_FILTER_ALL;
       // Write PNG to buffer
@@ -706,7 +706,7 @@ class ResizeWorker : public NanAsyncWorker {
         return Error(baton, hook);
       }
       baton->outputFormat = "webp";
-#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42)
+#if (VIPS_MAJOR_VERSION >= 8 || (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42))
     } else if (baton->output == "__raw") {
       // Write raw, uncompressed image data to buffer
       if (baton->greyscale) {
@@ -750,7 +750,7 @@ class ResizeWorker : public NanAsyncWorker {
         }
         baton->outputFormat = "jpeg";
       } else if (outputPng || (matchInput && inputImageType == ImageType::PNG)) {
-#if (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42)
+#if (VIPS_MAJOR_VERSION >= 8 || (VIPS_MAJOR_VERSION >= 7 && VIPS_MINOR_VERSION >= 42))
         // Select PNG row filter
         int filter = baton->withoutAdaptiveFiltering ? VIPS_FOREIGN_PNG_FILTER_NONE : VIPS_FOREIGN_PNG_FILTER_ALL;
         // Write PNG to file

test/unit/io.js

@@ -537,6 +537,24 @@ describe('Input/output', function() {
     });
   }
 
+  if (semver.gte(sharp.libvipsVersion(), '8.0.0')) {
+    it('Load GIF from Buffer [libvips ' + sharp.libvipsVersion() + '>=8.0.0]', function(done) {
+      var inputGifBuffer = fs.readFileSync(fixtures.inputGif);
+      sharp(inputGifBuffer)
+        .resize(320, 240)
+        .jpeg()
+        .toBuffer(function(err, data, info) {
+          if (err) throw err;
+          assert.strictEqual(true, data.length > 0);
+          assert.strictEqual(data.length, info.size);
+          assert.strictEqual('jpeg', info.format);
+          assert.strictEqual(320, info.width);
+          assert.strictEqual(240, info.height);
+          done();
+        });
+    });
+  }
+
   if (semver.gte(sharp.libvipsVersion(), '7.42.0')) {
     describe('Ouput raw, uncompressed image data [libvips ' + sharp.libvipsVersion() + '>=7.42.0]', function() {
       it('1 channel greyscale image', function(done) {