agg::rgba8 Struct Reference

#include <AGG.h>

List of all members.

Public Types
enum	order { rgb, bgr }
Public Member Functions
	rgba8 ()
	rgba8 (unsigned r_, unsigned g_, unsigned b_, unsigned a_=255)
	rgba8 (unsigned packed, order o)
void	opacity (double a_)
double	opacity () const
rgba8	gradient (rgba8 c, double k) const
rgba8	pre () const
Public Attributes
int8u	r
int8u	g
int8u	b
int8u	a

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Detailed Description

Definition at line 37 of file AGG.h.

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Member Enumeration Documentation

enum agg::rgba8::order

Enumerator:

rgb
bgr

Definition at line 39 of file AGG.h.

{ rgb, bgr };

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Constructor & Destructor Documentation

agg::rgba8::rgba8

(

)

[inline]

Definition at line 47 of file AGG.h.

{}

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agg::rgba8::rgba8	(	unsigned	r_,
		unsigned	g_,
		unsigned	b_,
		unsigned	a_ = 255
	)		[inline]

Definition at line 50 of file AGG.h.

                                                                      :
            r(int8u(r_)), g(int8u(g_)), b(int8u(b_)), a(int8u(a_)) {}

agg::rgba8::rgba8	(	unsigned	packed,
		order	o
	)		[inline]

Definition at line 54 of file AGG.h.

                                        : 
            r((o == rgb) ? ((packed >> 16) & 0xFF) : (packed & 0xFF)),
            g((packed >> 8)  & 0xFF),
            b((o == rgb) ? (packed & 0xFF) : ((packed >> 16) & 0xFF)),
            a(255) {}

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Member Function Documentation

rgba8 agg::rgba8::gradient	(	rgba8	c,
		double	k
	)		const [inline]

Definition at line 75 of file AGG.h.

        {
            rgba8 ret;
            int ik = int(k * 256);
            ret.r = int8u(int(r) + (((int(c.r) - int(r)) * ik) >> 8));
            ret.g = int8u(int(g) + (((int(c.g) - int(g)) * ik) >> 8));
            ret.b = int8u(int(b) + (((int(c.b) - int(b)) * ik) >> 8));
            ret.a = int8u(int(a) + (((int(c.a) - int(a)) * ik) >> 8));
            return ret;
        }

double agg::rgba8::opacity

(

)

const [inline]

Definition at line 69 of file AGG.h.

        {
            return double(a) / 255.0;
        }

void agg::rgba8::opacity

(

double

a_

)

[inline]

Definition at line 61 of file AGG.h.

        {
            if(a_ < 0.0) a_ = 0.0;
            if(a_ > 1.0) a_ = 1.0;
            a = int8u(a_ * 255.0);
        }

rgba8 agg::rgba8::pre

(

)

const [inline]

Definition at line 86 of file AGG.h.

        {
            return rgba8((r*a) >> 8, (g*a) >> 8, (b*a) >> 8, a);
        }

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Member Data Documentation

int8u agg::rgba8::a

Definition at line 44 of file AGG.h.

int8u agg::rgba8::b

Definition at line 43 of file AGG.h.

int8u agg::rgba8::g

Definition at line 42 of file AGG.h.

int8u agg::rgba8::r

Definition at line 41 of file AGG.h.

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The documentation for this struct was generated from the following file:

• /home/cube/sources/osgearth/src/osgEarthSymbology/AGG.h