Improved performance and reduced temporary memory usage of love.graphics.newScreenshot and Canvas:getImageData

src/modules/image/magpie/Image.cpp

@@ -57,9 +57,9 @@ love::image::ImageData *Image::newImageData(int width, int height)
 	return new ImageData(width, height);
 }
 
-love::image::ImageData *Image::newImageData(int width, int height, void *data)
+love::image::ImageData *Image::newImageData(int width, int height, void *data, bool own)
 {
-	return new ImageData(width, height, data);
+	return new ImageData(width, height, data, own);
 }
 
 love::image::CompressedData *Image::newCompressedData(love::filesystem::FileData *data)

src/modules/image/magpie/Image.h

@@ -48,7 +48,7 @@ public:
 
 	love::image::ImageData *newImageData(love::filesystem::FileData *data);
 	love::image::ImageData *newImageData(int width, int height);
-	love::image::ImageData *newImageData(int width, int height, void *data);
+	love::image::ImageData *newImageData(int width, int height, void *data, bool own = false);
 
 	love::image::CompressedData *newCompressedData(love::filesystem::FileData *data);
 

src/modules/image/magpie/ImageData.cpp

@@ -45,11 +45,15 @@ ImageData::ImageData(int width, int height)
 	memset(data, 0, width*height*sizeof(pixel));
 }
 
-ImageData::ImageData(int width, int height, void *data)
+ImageData::ImageData(int width, int height, void *data, bool own)
 {
 	this->width = width;
 	this->height = height;
-	create(width, height, data);
+
+	if (own)
+		this->data = (unsigned char *) data;
+	else
+		create(width, height, data);
 }
 
 ImageData::~ImageData()

src/modules/image/magpie/ImageData.h

@@ -38,7 +38,7 @@ public:
 
 	ImageData(love::filesystem::FileData *data);
 	ImageData(int width, int height);
-	ImageData(int width, int height, void *data);
+	ImageData(int width, int height, void *data, bool own);
 	virtual ~ImageData();
 
 	// Implements image::ImageData.