agg::span_rgba32 Struct Reference

#include <AGG.h>

List of all members.

Static Public Member Functions
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 1216 of file AGG.h.

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Member Function Documentation

static rgba8 agg::span_rgba32::get	(	unsigned char *	ptr,
		int	x
	)		[inline, static]

Definition at line 1252 of file AGG.h.

        {
            unsigned char* p = ptr + (x << 2);
            rgba8 c;
            c.r = *p++; 
            c.g = *p++; 
            c.b = *p++;
            c.a = *p;
            return c;
        }

static void agg::span_rgba32::hline	(	unsigned char *	ptr,
		int	x,
		unsigned	count,
		const rgba8 &	c
	)		[inline, static]

Definition at line 1242 of file AGG.h.

        {
            unsigned char* p = ptr + (x << 2);
            do { *p++ = c.r; *p++ = c.g; *p++ = c.b; *p++ = c.a; } while(--count);
        }

static void agg::span_rgba32::render	(	unsigned char *	ptr,
		int	x,
		unsigned	count,
		const unsigned char *	covers,
		const rgba8 &	c
	)		[inline, static]

Definition at line 1219 of file AGG.h.

        {
            unsigned char* p = ptr + (x << 2);
            do
            {
                int alpha = (*covers++) * c.a;
                int r = p[0];
                int g = p[1];
                int b = p[2];
                int a = p[3];
                *p++ = (((c.r - r) * alpha) + (r << 16)) >> 16;
                *p++ = (((c.g - g) * alpha) + (g << 16)) >> 16;
                *p++ = (((c.b - b) * alpha) + (b << 16)) >> 16;
                *p++ = (((c.a - a) * alpha) + (a << 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