Some optimizations (#880)

include/utils/Image.h

@@ -1,51 +1,24 @@
 #pragma once
 
-// STL includes
+#include <QSharedDataPointer>
-#include <vector>
-#include <cstdint>
-#include <cstring>
-#include <algorithm>
-#include <cassert>
-#include <utils/ColorRgb.h>
 
-// https://docs.microsoft.com/en-us/windows/win32/winprog/windows-data-types#ssize-t
+#include <utils/ImageData.h>
-#if defined(_MSC_VER)
-#include <BaseTsd.h>
-typedef SSIZE_T ssize_t;
-#endif
 
 template <typename Pixel_T>
 class Image
 {
 public:
-
 	typedef Pixel_T pixel_type;
 
-	///
-	/// Default constructor for an image
-	///
 	Image() :
-		_width(1),
+		Image(1, 1, Pixel_T())
-		_height(1),
-		_pixels(new Pixel_T[2]),
-		_endOfPixels(_pixels + 1)
 	{
-		memset(_pixels, 0, 2*sizeof(Pixel_T));
 	}
 
-	///
-	/// Constructor for an image with specified width and height
-	///
-	/// @param width The width of the image
-	/// @param height The height of the image
-	///
 	Image(const unsigned width, const unsigned height) :
-		_width(width),
+		Image(width, height, Pixel_T())
-		_height(height),
+
-		_pixels(new Pixel_T[width * height + 1]),
-		_endOfPixels(_pixels + width * height)
 	{
-		memset(_pixels, 0, (_width*_height+1)*sizeof(Pixel_T));
 	}
 
 	///
@@ -56,52 +29,37 @@ public:
 	/// @param background The color of the image
 	///
 	Image(const unsigned width, const unsigned height, const Pixel_T background) :
-		_width(width),
+		_d_ptr(new ImageData<Pixel_T>(width, height, background))
-		_height(height),
-		_pixels(new Pixel_T[width * height + 1]),
-		_endOfPixels(_pixels + width * height)
 	{
-		std::fill(_pixels, _endOfPixels, background);
 	}
 
 	///
 	/// Copy constructor for an image
+	/// @param other The image which will be copied
 	///
-	Image(const Image & other) :
+	Image(const Image & other)
-		_width(other._width),
-		_height(other._height),
-		_pixels(new Pixel_T[other._width * other._height + 1]),
-		_endOfPixels(_pixels + other._width * other._height)
 	{
-		memcpy(_pixels, other._pixels, (long) other._width * other._height * sizeof(Pixel_T));
+		_d_ptr = other._d_ptr;
 	}
 
-	// Define assignment operator in terms of the copy constructor
-	// More to read: https://stackoverflow.com/questions/255612/dynamically-allocating-an-array-of-objects?answertab=active#tab-top
 	Image& operator=(Image rhs)
 	{
-		rhs.swap(*this);
+		// Define assignment operator in terms of the copy constructor
+		// More to read: https://stackoverflow.com/questions/255612/dynamically-allocating-an-array-of-objects?answertab=active#tab-top
+		_d_ptr = rhs._d_ptr;
 		return *this;
 	}
 
-	void swap(Image& s) noexcept
+	void swap(Image& s)
 	{
-		using std::swap;
+		std::swap(this->_d_ptr, s._d_ptr);
-		swap(this->_width, s._width);
-		swap(this->_height, s._height);
-		swap(this->_pixels, s._pixels);
-		swap(this->_endOfPixels, s._endOfPixels);
 	}
 
-	// C++11
 	Image(Image&& src) noexcept
-		: _width(0)
-		, _height(0)
-		, _pixels(NULL)
-		, _endOfPixels(NULL)
 	{
-		src.swap(*this);
+		std::swap(this->_d_ptr, src._d_ptr);
 	}
+
 	Image& operator=(Image&& src) noexcept
 	{
 		src.swap(*this);
@@ -113,7 +71,6 @@ public:
 	///
 	~Image()
 	{
-		delete[] _pixels;
 	}
 
 	///
@@ -123,7 +80,7 @@ public:
 	///
 	inline unsigned width() const
 	{
-		return _width;
+		return _d_ptr->width();
 	}
 
 	///
@@ -133,22 +90,17 @@ public:
 	///
 	inline unsigned height() const
 	{
-		return _height;
+		return _d_ptr->height();
 	}
 
 	uint8_t red(const unsigned pixel) const
 	{
-		return (_pixels + pixel)->red;
+		return _d_ptr->red(pixel);
 	}
 
 	uint8_t green(const unsigned pixel) const
 	{
-		return (_pixels + pixel)->green;
+		return _d_ptr->green(pixel);
-	}
-
-	uint8_t blue(const unsigned pixel) const
-	{
-		return (_pixels + pixel)->blue;
 	}
 
 	///
@@ -159,9 +111,9 @@ public:
 	///
 	/// @return const reference to specified pixel
 	///
-	const Pixel_T& operator()(const unsigned x, const unsigned y) const
+	uint8_t blue(const unsigned pixel) const
 	{
-		return _pixels[toIndex(x,y)];
+		return _d_ptr->blue(pixel);
 	}
 
 	///
@@ -169,12 +121,17 @@ public:
 	///
 	/// @param x The x index
 	/// @param y The y index
+	const Pixel_T& operator()(const unsigned x, const unsigned y) const
+	{
+		return _d_ptr->operator()(x, y);
+	}
+
 	///
 	/// @return reference to specified pixel
 	///
 	Pixel_T& operator()(const unsigned x, const unsigned y)
 	{
-		return _pixels[toIndex(x,y)];
+		return _d_ptr->operator()(x, y);
 	}
 
 	/// Resize the image
@@ -182,28 +139,7 @@ public:
 	/// @param height The height of the image
 	void resize(const unsigned width, const unsigned height)
 	{
-		if ((width*height) > unsigned((_endOfPixels-_pixels)))
+		_d_ptr->resize(width, height);
-		{
-			delete[] _pixels;
-			_pixels = new Pixel_T[width*height + 1];
-			_endOfPixels = _pixels + width*height;
-		}
-
-		_width = width;
-		_height = height;
-	}
-
-	///
-	/// Copies another image into this image. The images should have exactly the same size.
-	///
-	/// @param other The image to copy into this
-	///
-	void copy(const Image<Pixel_T>& other)
-	{
-		assert(other._width == _width);
-		assert(other._height == _height);
-
-		memcpy(_pixels, other._pixels, _width * _height * sizeof(Pixel_T));
 	}
 
 	///
@@ -212,7 +148,7 @@ public:
 	///
 	Pixel_T* memptr()
 	{
-		return _pixels;
+		return _d_ptr->memptr();
 	}
 
 	///
@@ -221,10 +157,9 @@ public:
 	///
 	const Pixel_T* memptr() const
 	{
-		return _pixels;
+		return _d_ptr->memptr();
 	}
 
-
 	///
 	/// Convert image of any color order to a RGB image.
 	///
@@ -232,38 +167,31 @@ public:
 	///
 	void toRgb(Image<ColorRgb>& image)
 	{
-		image.resize(_width, _height);
+		_d_ptr->toRgb(*(image.imageData()));
-		const unsigned imageSize = _width * _height;
-
-		for (unsigned idx=0; idx<imageSize; idx++)
-		{
-			const Pixel_T color = memptr()[idx];
-			image.memptr()[idx] = ColorRgb{color.red, color.green, color.blue};
-		}
 	}
 
 	///
-	/// get size of buffer
+	/// Get size of buffer
-	//
+	///
 	ssize_t size() const
 	{
-		return  (ssize_t) _width * _height * sizeof(Pixel_T);
+		return _d_ptr->size();
 	}
 
+	///
 	/// Clear the image
-	//
+	///
 	void clear()
 	{
-		_width = 1;
+		_d_ptr->clear();
-		_height = 1;
+	}
-		delete[] _pixels;
+
-		_pixels = new Pixel_T[2];
+	QSharedDataPointer<ImageData<Pixel_T>> imageData() const
-		_endOfPixels = _pixels + 1;
+	{
-		memset(_pixels, 0, (unsigned long) _width * _height * sizeof(Pixel_T));
+		return _d_ptr;
 	}
 
 private:
-
 	///
 	/// Translate x and y coordinate to index of the underlying vector
 	///
@@ -274,18 +202,10 @@ private:
 	///
 	inline unsigned toIndex(const unsigned x, const unsigned y) const
 	{
-		return y*_width + x;
+		return _d_ptr->toIndex(x, y);
 	}
 
 private:
-	/// The width of the image
+	QSharedDataPointer<ImageData<Pixel_T>>  _d_ptr;
-	unsigned _width;
-	/// The height of the image
-	unsigned _height;
-
-	/// The pixels of the image
-	Pixel_T* _pixels;
-
-	/// Pointer to the last(extra) pixel
-	Pixel_T* _endOfPixels;
 };
+

include/utils/ImageData.h

@@ -0,0 +1,180 @@
+#pragma once
+
+// STL includes
+#include <vector>
+#include <cstdint>
+#include <cstring>
+#include <algorithm>
+#include <cassert>
+#include <type_traits>
+#include <utils/ColorRgb.h>
+
+// QT includes
+#include <QSharedData>
+
+// https://docs.microsoft.com/en-us/windows/win32/winprog/windows-data-types#ssize-t
+#if defined(_MSC_VER)
+#include <BaseTsd.h>
+typedef SSIZE_T ssize_t;
+#endif
+
+template <typename Pixel_T>
+class ImageData : public QSharedData
+{
+public:
+	typedef Pixel_T pixel_type;
+
+	ImageData(const unsigned width, const unsigned height, const Pixel_T background) :
+		_width(width),
+		_height(height),
+		_pixels(new Pixel_T[width * height + 1])
+	{
+		std::fill(_pixels, _pixels + width * height, background);
+	}
+
+	ImageData(const ImageData & other) :
+		QSharedData(other),
+		_width(other._width),
+		_height(other._height),
+		_pixels(new Pixel_T[other._width * other._height + 1])
+	{
+		memcpy(_pixels, other._pixels, (long) other._width * other._height * sizeof(Pixel_T));
+	}
+
+	ImageData& operator=(ImageData rhs)
+	{
+		rhs.swap(*this);
+		return *this;
+	}
+
+	void swap(ImageData& s) noexcept
+	{
+		using std::swap;
+		swap(this->_width, s._width);
+		swap(this->_height, s._height);
+		swap(this->_pixels, s._pixels);
+	}
+
+	ImageData(ImageData&& src) noexcept
+		: _width(0)
+		, _height(0)
+		, _pixels(NULL)
+	{
+		src.swap(*this);
+	}
+
+	ImageData& operator=(ImageData&& src) noexcept
+	{
+		src.swap(*this);
+		return *this;
+	}
+
+	~ImageData()
+	{
+		delete[] _pixels;
+	}
+
+	inline unsigned width() const
+	{
+		return _width;
+	}
+
+	inline unsigned height() const
+	{
+		return _height;
+	}
+
+	uint8_t red(const unsigned pixel) const
+	{
+		return (_pixels + pixel)->red;
+	}
+
+	uint8_t green(const unsigned pixel) const
+	{
+		return (_pixels + pixel)->green;
+	}
+
+	uint8_t blue(const unsigned pixel) const
+	{
+		return (_pixels + pixel)->blue;
+	}
+
+	const Pixel_T& operator()(const unsigned x, const unsigned y) const
+	{
+		return _pixels[toIndex(x,y)];
+	}
+
+	Pixel_T& operator()(const unsigned x, const unsigned y)
+	{
+		return _pixels[toIndex(x,y)];
+	}
+
+	void resize(const unsigned width, const unsigned height)
+	{
+		if (width == _width && height == _height)
+			return;
+
+		if ((width * height) > unsigned((_width * _height)))
+		{
+			delete[] _pixels;
+			_pixels = new Pixel_T[width*height + 1];
+		}
+
+		_width = width;
+		_height = height;
+	}
+
+	Pixel_T* memptr()
+	{
+		return _pixels;
+	}
+
+	const Pixel_T* memptr() const
+	{
+		return _pixels;
+	}
+
+	void toRgb(ImageData<ColorRgb>& image)
+	{
+		image.resize(_width, _height);
+		const unsigned imageSize = _width * _height;
+
+		for (unsigned idx = 0; idx < imageSize; idx++)
+		{
+			const Pixel_T & color = _pixels[idx];
+			image.memptr()[idx] = ColorRgb{color.red, color.green, color.blue};
+		}
+	}
+
+	ssize_t size() const
+	{
+		return  (ssize_t) _width * _height * sizeof(Pixel_T);
+	}
+
+	void clear()
+	{
+		if (_width != 1 || _height != 1)
+		{
+			_width = 1;
+			_height = 1;
+			delete[] _pixels;
+			_pixels = new Pixel_T[2];
+		}
+
+		memset(_pixels, 0, (unsigned long) _width * _height * sizeof(Pixel_T));
+	}
+
+private:
+	inline unsigned toIndex(const unsigned x, const unsigned y) const
+	{
+		return y * _width + x;
+	}
+
+private:
+	/// The width of the image
+	unsigned _width;
+	/// The height of the image
+	unsigned _height;
+	/// The pixels of the image
+	Pixel_T* _pixels;
+};

libsrc/hyperion/Hyperion.cpp

@@ -39,6 +39,7 @@
 // Boblight
 #include <boblightserver/BoblightServer.h>
 
+
 Hyperion::Hyperion(const quint8& instance)
 	: QObject()
 	, _instIndex(instance)

libsrc/utils/ImageResampler.cpp

@@ -60,7 +60,6 @@ void ImageResampler::processImage(const uint8_t * data, int width, int height, i
 	// calculate the output size
 	int outputWidth = (width - _cropLeft - cropRight - (_horizontalDecimation >> 1) + _horizontalDecimation - 1) / _horizontalDecimation;
 	int outputHeight = (height - _cropTop - cropBottom - (_verticalDecimation >> 1) + _verticalDecimation - 1) / _verticalDecimation;
-	if ((outputImage.height() != unsigned(outputHeight)) && (outputImage.width() != unsigned(outputWidth)))
 	outputImage.resize(outputWidth, outputHeight);
 
 	for (int yDest = 0, ySource = _cropTop + (_verticalDecimation >> 1); yDest < outputHeight; ySource += _verticalDecimation, ++yDest)