diff options
Diffstat (limited to 'include/Platform.h')
| -rw-r--r-- | include/Platform.h | 150 |
1 files changed, 61 insertions, 89 deletions
diff --git a/include/Platform.h b/include/Platform.h index eeb72c1ce..0beede070 100644 --- a/include/Platform.h +++ b/include/Platform.h @@ -42,11 +42,10 @@ // Underlying the implementation of the platform classes are platform specific types. // Sometimes these need to be passed around by client code so they are defined here -typedef void* FontID; -typedef void* SurfaceID; -typedef void* WindowID; -typedef void* MenuID; -typedef void* PaletteID; +typedef void *FontID; +typedef void *SurfaceID; +typedef void *WindowID; +typedef void *MenuID; /** * A geometric point class. @@ -104,7 +103,19 @@ public: }; /** - * A colour class. + * In some circumstances, including Win32 in paletted mode and GTK+, each colour + * must be allocated before use. The desired colours are held in the ColourDesired class, + * and after allocation the allocation entry is stored in the ColourAllocated class. In other + * circumstances, such as Win32 in true colour mode, the allocation process just copies + * the RGB values from the desired to the allocated class. + * As each desired colour requires allocation before it can be used, the ColourPair class + * holds both a ColourDesired and a ColourAllocated + * The Palette class is responsible for managing the palette of colours which contains a + * list of ColourPair objects and performs the allocation. + */ + +/** + * Holds a desired RGB colour. */ class ColourDesired { long co; @@ -142,6 +153,9 @@ public: } }; +/** + * Holds an allocated RGB colour which may be an approximation to the desired colour. + */ class ColourAllocated { long coAllocated; @@ -161,10 +175,7 @@ public: }; /** - * Colour pairs hold a desired colour and the colour that the graphics engine - * allocates to approximate the desired colour. - * To make palette management more automatic, ColourPairs could register at - * construction time with a palette management object. + * Colour pairs hold a desired colour and an allocated colour. */ struct ColourPair { ColourDesired desired; @@ -190,8 +201,6 @@ class Palette { int allocatedLen; #elif PLAT_WIN void *hpal; -#elif PLAT_WX - // wxPalette* pal; // **** Is this needed? #endif public: bool allowRealization; @@ -209,8 +218,6 @@ public: void WantFind(ColourPair &cp, bool want); void Allocate(Window &w); - - friend class Surface; }; /** @@ -243,84 +250,50 @@ public: */ class Surface { private: - bool unicodeMode; -#if PLAT_GTK - void *drawable; // GdkDrawable *drawable; - void *gc; // GdkGC *gc; - void *ppixmap; // GdkPixmap *ppixmap; - int x; - int y; - bool inited; - bool createdGC; -#elif PLAT_WIN - void *hdc; // HDC - bool hdcOwned; - void *pen; // HPEN - void *penOld; // HPEN - void *brush; // HBRUSH - void *brushOld; // HBRUSH - void *font; // HFONT - void *fontOld; // HFONT - void *bitmap; // HBITMAP - void *bitmapOld; // HBITMAP - void *paletteOld; // HPALETTE -#elif PLAT_WX - void *hdc; // wxDC* - bool hdcOwned; - void *bitmap; // wxBitmap* - int x; - int y; -#endif - // Private so Surface objects can not be copied Surface(const Surface &) {} Surface &operator=(const Surface &) { return *this; } -#if PLAT_WIN || PLAT_WX - void BrushColor(ColourAllocated back); - void SetFont(Font &font_); -#endif public: - Surface(); - ~Surface(); - - void Init(); - void Init(SurfaceID sid); - void InitPixMap(int width, int height, Surface *surface_); - - void Release(); - bool Initialised(); - void PenColour(ColourAllocated fore); - int LogPixelsY(); - int DeviceHeightFont(int points); - void MoveTo(int x_, int y_); - void LineTo(int x_, int y_); - void Polygon(Point *pts, int npts, ColourAllocated fore, ColourAllocated back); - void RectangleDraw(PRectangle rc, ColourAllocated fore, ColourAllocated back); - void FillRectangle(PRectangle rc, ColourAllocated back); - void FillRectangle(PRectangle rc, Surface &surfacePattern); - void RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back); - void Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back); - void Copy(PRectangle rc, Point from, Surface &surfaceSource); - - void DrawText(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back); - void DrawTextClipped(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back); - void MeasureWidths(Font &font_, const char *s, int len, int *positions); - int WidthText(Font &font_, const char *s, int len); - int WidthChar(Font &font_, char ch); - int Ascent(Font &font_); - int Descent(Font &font_); - int InternalLeading(Font &font_); - int ExternalLeading(Font &font_); - int Height(Font &font_); - int AverageCharWidth(Font &font_); - - int SetPalette(Palette *pal, bool inBackGround); - void SetClip(PRectangle rc); - void FlushCachedState(); - - void SetUnicodeMode(bool unicodeMode_) { - unicodeMode=unicodeMode_; - } + Surface() {}; + virtual ~Surface() {}; + static Surface *Allocate(); + + virtual void Init()=0; + virtual void Init(SurfaceID sid)=0; + virtual void InitPixMap(int width, int height, Surface *surface_)=0; + + virtual void Release()=0; + virtual bool Initialised()=0; + virtual void PenColour(ColourAllocated fore)=0; + virtual int LogPixelsY()=0; + virtual int DeviceHeightFont(int points)=0; + virtual void MoveTo(int x_, int y_)=0; + virtual void LineTo(int x_, int y_)=0; + virtual void Polygon(Point *pts, int npts, ColourAllocated fore, ColourAllocated back)=0; + virtual void RectangleDraw(PRectangle rc, ColourAllocated fore, ColourAllocated back)=0; + virtual void FillRectangle(PRectangle rc, ColourAllocated back)=0; + virtual void FillRectangle(PRectangle rc, Surface &surfacePattern)=0; + virtual void RoundedRectangle(PRectangle rc, ColourAllocated fore, ColourAllocated back)=0; + virtual void Ellipse(PRectangle rc, ColourAllocated fore, ColourAllocated back)=0; + virtual void Copy(PRectangle rc, Point from, Surface &surfaceSource)=0; + + virtual void DrawText(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back)=0; + virtual void DrawTextClipped(PRectangle rc, Font &font_, int ybase, const char *s, int len, ColourAllocated fore, ColourAllocated back)=0; + virtual void MeasureWidths(Font &font_, const char *s, int len, int *positions)=0; + virtual int WidthText(Font &font_, const char *s, int len)=0; + virtual int WidthChar(Font &font_, char ch)=0; + virtual int Ascent(Font &font_)=0; + virtual int Descent(Font &font_)=0; + virtual int InternalLeading(Font &font_)=0; + virtual int ExternalLeading(Font &font_)=0; + virtual int Height(Font &font_)=0; + virtual int AverageCharWidth(Font &font_)=0; + + virtual int SetPalette(Palette *pal, bool inBackGround)=0; + virtual void SetClip(PRectangle rc)=0; + virtual void FlushCachedState()=0; + + virtual void SetUnicodeMode(bool unicodeMode_)=0; }; /** @@ -333,7 +306,6 @@ typedef void (*CallBackAction)(void*); * Does not own the window which will normally have a longer life than this object. */ class Window { - friend class ListBox; protected: WindowID id; public: |