osd.c File Reference

#include "osd.h"
#include <math.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include "device.h"
#include "tools.h"

Go to the source code of this file.

Classes
class	cInitAlphaLut

Macros
#define	USE_ALPHA_LUT

Functions
tColor	HsvToColor (double H, double S, double V)
tColor	RgbShade (tColor Color, double Factor)
tColor	AlphaBlend (tColor ColorFg, tColor ColorBg, uint8_t AlphaLayer)

Variables
static uint16_t	AlphaLutFactors [255][256][2]
static uint8_t	AlphaLutAlpha [255][256]
class cInitAlphaLut	InitAlphaLut
static const char *	OsdErrorTexts []

Macro Definition Documentation

USE_ALPHA_LUT

#define USE_ALPHA_LUT

Definition at line 53 of file osd.c.

Function Documentation

AlphaBlend()

tColor AlphaBlend	(	tColor	ColorFg,
		tColor	ColorBg,
		uint8_t	AlphaLayer )

Definition at line 81 of file osd.c.

References AlphaBlend(), AlphaLutAlpha, and AlphaLutFactors.

Referenced by AlphaBlend(), cPixmapMemory::DrawBlendedPixel(), cPixmapMemory::DrawPixel(), cFreetypeFont::DrawText(), cPixmapMemory::Render(), and cImage::Scaled().

HsvToColor()

tColor HsvToColor	(	double	H,
		double	S,
		double	V )

Converts the given Hue (0..360), Saturation (0..1) and Value (0..1) to an RGB tColor value.

The alpha value of the result is 0x00, so the caller may need to set it accordingly.

Definition at line 19 of file osd.c.

References HsvToColor(), and RgbToColor().

Referenced by cTrueColorDemo::Action(), and HsvToColor().

RgbShade()

tColor RgbShade	(	tColor	Color,
		double	Factor )

Returns a brighter (Factor > 0) or darker (Factor < 0) version of the given Color.

If Factor is 0.0, the return value is the unchanged Color, If Factor is 1.0, white is returned. If Factor is -1.0, black is returned. The alpha value of Color is returned unchanged.

Definition at line 43 of file osd.c.

References constrain(), min(), and RgbShade().

Referenced by RgbShade(), THEME_CLR(), THEME_CLR(), THEME_CLR(), THEME_CLR(), THEME_CLR(), and THEME_CLR().

Variable Documentation

AlphaLutAlpha

uint8_t AlphaLutAlpha[255][256]

static

Definition at line 59 of file osd.c.

Referenced by AlphaBlend(), and cInitAlphaLut::cInitAlphaLut().

AlphaLutFactors

uint16_t AlphaLutFactors[255][256][2]

static

Definition at line 58 of file osd.c.

Referenced by AlphaBlend(), and cInitAlphaLut::cInitAlphaLut().

InitAlphaLut

class cInitAlphaLut InitAlphaLut

OsdErrorTexts

const char* OsdErrorTexts[]

static

Initial value:

                              = {
"ok",
"too many areas",
"too many colors",
"bpp not supported",
"areas overlap",
"wrong alignment",
"out of memory",
"wrong area size",
"unknown",
}

Definition at line 1891 of file osd.c.

Referenced by cOsd::SetAreas().