agg::span_rgb555 Struct Reference

#include <AGG.h>

List of all members.

Static Public Member Functions
static int16u	rgb555 (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 844 of file AGG.h.

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Member Function Documentation

static rgba8 agg::span_rgb555::get	(	unsigned char *	ptr,
		int	x
	)		[inline, static]

Definition at line 888 of file AGG.h.

        {
            int16u rgb = ((int16u*)ptr)[x];
            rgba8 c;
            c.r = (rgb >> 7) & 0xF8; 
            c.g = (rgb >> 2) & 0xF8; 
            c.b = (rgb << 3) & 0xF8;
            c.a = 255;
            return c;
        }

static void agg::span_rgb555::hline	(	unsigned char *	ptr,
		int	x,
		unsigned	count,
		const rgba8 &	c
	)		[inline, static]

Definition at line 877 of file AGG.h.

        {
            int16u* p = ((int16u*)ptr) + x;
            int16u  v = rgb555(c.r, c.g, c.b);
            do { *p++ = v; } while(--count);
        }

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static void agg::span_rgb555::render	(	unsigned char *	ptr,
		int	x,
		unsigned	count,
		const unsigned char *	covers,
		const rgba8 &	c
	)		[inline, static]

Definition at line 853 of file AGG.h.

        {
            int16u* p = ((int16u*)ptr) + x;
            do
            {
                int16 rgb = *p;
                int alpha = (*covers++) * c.a;

                int r = (rgb >> 7) & 0xF8;
                int g = (rgb >> 2) & 0xF8;
                int b = (rgb << 3) & 0xF8;

                *p++ = (((((c.r - r) * alpha) + (r << 16)) >> 9) & 0x7C00) |
                       (((((c.g - g) * alpha) + (g << 16)) >> 14) & 0x3E0) |
                        ((((c.b - b) * alpha) + (b << 16)) >> 19);
            }
            while(--count);
        }

static int16u agg::span_rgb555::rgb555	(	unsigned	r,
		unsigned	g,
		unsigned	b
	)		[inline, static]

Definition at line 847 of file AGG.h.

        {
            return ((r & 0xF8) << 7) | ((g & 0xF8) << 2) | (b >> 3);
        }

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

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