agg::span_mono8 Struct Reference

#include <AGG.h>

List of all members.

Static Public Member Functions
static unsigned	mono8 (unsigned r, unsigned g, unsigned b)
static void	render (unsigned char *ptr, int x, unsigned count, const unsigned char *covers, const rgba8 &c)
static void	hline (unsigned char *ptr, int x, unsigned count, const rgba8 &c)
static rgba8	get (unsigned char *ptr, int x)

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Detailed Description

Definition at line 791 of file AGG.h.

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Member Function Documentation

static rgba8 agg::span_mono8::get	(	unsigned char *	ptr,
		int	x
	)		[inline, static]

Definition at line 829 of file AGG.h.

        {
            unsigned rgb = ptr[x];
            rgba8 c;
            c.r = rgb; 
            c.g = rgb; 
            c.b = rgb;
            c.a = 255;
            return c;
        }

static void agg::span_mono8::hline	(	unsigned char *	ptr,
		int	x,
		unsigned	count,
		const rgba8 &	c
	)		[inline, static]

Definition at line 818 of file AGG.h.

        {
            unsigned char* p = ptr + x;
            unsigned v = mono8(c.r, c.g, c.b);
            do { *p++ = v; } while(--count);
        }

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static unsigned agg::span_mono8::mono8	(	unsigned	r,
		unsigned	g,
		unsigned	b
	)		[inline, static]

Definition at line 794 of file AGG.h.

        {
            return (r * 77 + g * 150 + b * 29) >> 8;
        }

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static void agg::span_mono8::render	(	unsigned char *	ptr,
		int	x,
		unsigned	count,
		const unsigned char *	covers,
		const rgba8 &	c
	)		[inline, static]

Definition at line 800 of file AGG.h.

        {
            unsigned char* p = ptr + x;
            unsigned dst = mono8(c.r, c.g, c.b);
            do
            {
                int alpha = (*covers++) * c.a;
                unsigned src = *p;
                *p++ = (((dst - src) * alpha) + (src << 16)) >> 16;
            }
            while(--count);
        }

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

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