NSImageContext

Author: kissandras

Sources/MacOSAppSupport/MAS_CocoaAppUtils.hpp

@@ -19,6 +19,8 @@ NSPoint						CreatePoint (const NSView* view, const NUIE::Point& point);
 NSPoint						CreateScreenPoint (const NSView* view, const NUIE::Point& point);
 NSRect						CreateRect (const NSView* view, const NUIE::Rect& rect);
 NSColor*					CreateColor (const NUIE::Color& color);
+NSImage*					FlipImageVertically (const NSImage* image);
+NSImage*					FlipImageHorizontally (const NSImage* image);
 
 NUIE::MenuCommandPtr		SelectCommandFromContextMenu (const NSView* nsView, const NUIE::Point& position, const NUIE::MenuCommandStructure& commands);
 

Sources/MacOSAppSupport/MAS_CocoaAppUtils.mm

@@ -95,7 +95,41 @@ NSRect CreateRect (const NSView* view, const NUIE::Rect& rect)
 {
 	return [NSColor colorWithRed:color.GetR () / 255.0f green:color.GetG () / 255.0f blue:color.GetB () / 255.0f alpha:1.0f];
 }
-	
+
+NSImage* FlipImageVertically (const NSImage* image)
+{
+	NSImage *tmpImage;
+	NSAffineTransform *transform = [NSAffineTransform transform];
+
+	NSSize dimensions = [image size];
+	NSAffineTransformStruct flip = {1.0, 0.0, 0.0, -1.0, 0.0, dimensions.height};
+	tmpImage = [[NSImage alloc] initWithSize:dimensions];
+	[tmpImage lockFocus];
+	[transform setTransformStruct:flip];
+	[transform concat];
+	[image drawAtPoint:NSMakePoint(0,0) fromRect:NSMakeRect(0,0, dimensions.width, dimensions.height) operation:NSCompositingOperationCopy fraction:1.0];
+	[tmpImage unlockFocus];
+
+	return [tmpImage autorelease];
+}
+
+NSImage* FlipImageHorizontally (const NSImage* image)
+{
+	NSImage *tmpImage;
+	NSAffineTransform *transform = [NSAffineTransform transform];
+
+	NSSize dimensions = [image size];
+	NSAffineTransformStruct flip = {-1.0, 0.0, 0.0, 1.0, 0.0, dimensions.width};
+	tmpImage = [[NSImage alloc] initWithSize:dimensions];
+	[tmpImage lockFocus];
+	[transform setTransformStruct:flip];
+	[transform concat];
+	[image drawAtPoint:NSMakePoint(0,0) fromRect:NSMakeRect(0,0, dimensions.width, dimensions.height) operation:NSCompositingOperationCopy fraction:1.0];
+	[tmpImage unlockFocus];
+
+	return [tmpImage autorelease];
+}
+
 static void AddCommandToMenu (const NUIE::MenuCommandPtr& command, std::unordered_map<int, NUIE::MenuCommandPtr>& commandTable, ContextMenu* originalMenu, ContextMenu* currentMenu, int& currentCommandId)
 {
 	if (command->HasChildCommands ()) {

Sources/MacOSAppSupport/MAS_NSImageContext.hpp

@@ -0,0 +1,77 @@
+#ifndef MAS_NSIMAGECONTEXT_HPP
+#define MAS_NSIMAGECONTEXT_HPP
+
+#include "NUIE_DrawingContext.hpp"
+#include "NUIE_Drawing.hpp"
+#include "NUIE_DrawingCacheKeys.hpp"
+#include "MAS_NSImageLoader.hpp"
+
+#include <unordered_map>
+
+#ifdef __cplusplus
+#ifdef __OBJC__
+	@class NSView;
+	@class NSFont;
+	@class NSImage;
+#else
+	struct NSView;
+	struct NSFont;
+	struct NSImage;
+#endif
+#endif
+
+namespace MAS
+{
+
+class NSImageContext : public NUIE::NativeDrawingContext
+{
+public:
+	NSImageContext ();
+	NSImageContext (const NSImageLoaderPtr& imageLoader);
+	NSImageContext (const NSImageContext& rhs) = delete;
+	virtual ~NSImageContext ();
+
+	virtual void				Init (void* nativeHandle) override;
+	virtual void				BlitToWindow (void* nativeHandle) override;
+	virtual void				BlitToContext (void* nativeContext) override;
+
+	virtual void				Resize (int newWidth, int newHeight) override;
+
+	virtual int					GetWidth () const override;
+	virtual int					GetHeight () const override;
+
+	virtual void				BeginDraw () override;
+	virtual void				EndDraw () override;
+
+	virtual bool				NeedToDraw (ItemPreviewMode mode) override;
+
+	virtual void				DrawLine (const NUIE::Point& beg, const NUIE::Point& end, const NUIE::Pen& pen) override;
+	virtual void				DrawBezier (const NUIE::Point& p1, const NUIE::Point& p2, const NUIE::Point& p3, const NUIE::Point& p4, const NUIE::Pen& pen) override;
+
+	virtual void				DrawRect (const NUIE::Rect& rect, const NUIE::Pen& pen) override;
+	virtual void				FillRect (const NUIE::Rect& rect, const NUIE::Color& color) override;
+
+	virtual void				DrawEllipse (const NUIE::Rect& rect, const NUIE::Pen& pen) override;
+	virtual void				FillEllipse (const NUIE::Rect& rect, const NUIE::Color& color) override;
+
+	virtual void				DrawFormattedText (const NUIE::Rect& rect, const NUIE::Font& font, const std::wstring& text, NUIE::HorizontalAnchor hAnchor, NUIE::VerticalAnchor vAnchor, const NUIE::Color& textColor) override;
+	virtual NUIE::Size			MeasureText (const NUIE::Font& font, const std::wstring& text) override;
+
+	virtual bool				CanDrawIcon () override;
+	virtual void				DrawIcon (const NUIE::Rect& rect, const NUIE::IconId& iconId) override;
+
+private:
+	NSFont*						GetFont (const NUIE::Font& font);
+	
+	int							width;
+	int							height;
+	NSView*						nsView;
+	NSImageLoaderPtr			imageLoader;
+	NSImage*					image;
+	
+	std::unordered_map<NUIE::FontCacheKey, NSFont*>		fontCache;
+};
+
+}
+
+#endif