* Copyright (c) 2001-2007, Haiku, Inc.
* Distributed under the terms of the MIT license.
*
* Author: DarkWyrm <bpmagic@columbus.rr.com>
* Stephan Aßmus <superstippi@gmx.de>
*/
#ifndef PATTERNHANDLER_H
#define PATTERNHANDLER_H
#include <stdio.h>
#include <string.h>
#include <GraphicsDefs.h>
class BPoint;
class Pattern {
public:
Pattern() {}
Pattern(const uint64& p)
{ fPattern.type64 = p; }
Pattern(const int8* p)
{ fPattern.type64 = *((const uint64*)p); }
Pattern(const Pattern& src)
{ fPattern.type64 = src.fPattern.type64; }
Pattern(const pattern& src)
{ fPattern.type64 = *(uint64*)src.data; }
inline const int8* GetInt8() const
{ return fPattern.type8; }
inline uint64 GetInt64() const
{ return fPattern.type64; }
inline const ::pattern& GetPattern() const
{ return *(const ::pattern*)&fPattern.type64; }
inline void Set(const int8* p)
{ fPattern.type64 = *((const uint64*)p); }
inline void Set(const uint64& p)
{ fPattern.type64 = p; }
Pattern& operator=(const Pattern& from)
{ fPattern.type64 = from.fPattern.type64; return *this; }
Pattern& operator=(const int64 &from)
{ fPattern.type64 = from; return *this; }
Pattern& operator=(const pattern &from)
{ memcpy(&fPattern.type64, &from, sizeof(pattern)); return *this; }
bool operator==(const Pattern& other) const
{ return fPattern.type64 == other.fPattern.type64; }
bool operator==(const pattern& other) const
{ return fPattern.type64 == *(uint64*)other.data; }
private:
typedef union
{
uint64 type64;
int8 type8[8];
} pattern_union;
pattern_union fPattern;
};
extern const Pattern kSolidHigh;
extern const Pattern kSolidLow;
extern const Pattern kMixedColors;
\brief Class for easy calculation and use of patterns
PatternHandlers are designed specifically for DisplayDriver subclasses.
Pattern support can be easily added by setting the pattern to use via
SetTarget, and then merely retrieving the value for the coordinates
specified.
*/
class PatternHandler {
public:
PatternHandler(void);
PatternHandler(const int8* p);
PatternHandler(const uint64& p);
PatternHandler(const Pattern& p);
PatternHandler(const PatternHandler& other);
virtual ~PatternHandler(void);
void SetPattern(const int8* p);
void SetPattern(const uint64& p);
void SetPattern(const Pattern& p);
void SetPattern(const pattern& p);
void SetColors(const rgb_color& high,
const rgb_color& low);
void SetHighColor(const rgb_color& color);
void SetLowColor(const rgb_color& color);
rgb_color HighColor() const
{ return fHighColor; }
rgb_color LowColor() const
{ return fLowColor; }
rgb_color ColorAt(const BPoint& pt) const;
rgb_color ColorAt(float x, float y) const;
inline rgb_color ColorAt(int x, int y) const;
bool IsHighColor(const BPoint& pt) const;
inline bool IsHighColor(int x, int y) const;
inline bool IsSolidHigh() const
{ return fPattern == B_SOLID_HIGH; }
inline bool IsSolidLow() const
{ return fPattern == B_SOLID_LOW; }
inline bool IsSolid() const
{ return IsSolidHigh() || IsSolidLow(); }
const pattern* GetR5Pattern(void) const
{ return (const pattern*)fPattern.GetInt8(); }
const Pattern& GetPattern(void) const
{ return fPattern; }
void SetOffsets(int32 x, int32 y);
private:
Pattern fPattern;
rgb_color fHighColor;
rgb_color fLowColor;
uint16 fXOffset;
uint16 fYOffset;
};
\brief Obtains the color in the pattern at the specified coordinates
\param x X coordinate to get the color for
\param y Y coordinate to get the color for
\return Color for the coordinates
*/
inline rgb_color
PatternHandler::ColorAt(int x, int y) const
{
return IsHighColor(x, y) ? fHighColor : fLowColor;
}
\brief Obtains the value of the pattern at the specified coordinates
\param pt Coordinates to get the value for
\return Value for the coordinates - true if high, false if low.
*/
inline bool
PatternHandler::IsHighColor(int x, int y) const
{
x -= fXOffset;
y -= fYOffset;
const int8* ptr = fPattern.GetInt8();
int32 value = ptr[y & 7] & (1 << (7 - (x & 7)) );
return value != 0;
}
#endif
