gvplugin_ascii.c File Reference

Device that renders to ASCII art. More...

#include "config.h"
#include <aalib.h>
#include <assert.h>
#include <gvc/gvplugin.h>
#include <gvc/gvplugin_device.h>
#include <limits.h>
#include <stdbool.h>
#include <stddef.h>
#include <util/gv_math.h>

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Macros
#define	GVPLUGIN_ASCII_API

Functions
static int	rgb_to_grayscale (unsigned red, unsigned green, unsigned blue)
	convert an RGB color to grayscale
static bool	is_space (const unsigned char *base, size_t size)
	does the given range only contain space characters?
static void	process (GVJ_t *job)

Variables
static gvdevice_engine_t	engine
static gvdevice_features_t	device_features
static gvplugin_installed_t	device_types []
static gvplugin_api_t	apis [] = {{API_device, device_types}, {0}}
GVPLUGIN_ASCII_API gvplugin_library_t	gvplugin_ascii_LTX_library

Detailed Description

This device does not attempt to examine your terminal dimensions. It simply assumes you want output of the dimensions of the renderer graph.

Definition in file gvplugin_ascii.c.

Macro Definition Documentation

GVPLUGIN_ASCII_API

#define GVPLUGIN_ASCII_API

Definition at line 132 of file gvplugin_ascii.c.

Function Documentation

is_space()

static bool is_space ( const unsigned char *  base, size_t  size  )

static

Definition at line 34 of file gvplugin_ascii.c.

References NULL.

Referenced by process().

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process()

static void process ( GVJ_t *  job )

static

Definition at line 45 of file gvplugin_ascii.c.

References agerrorf(), BYTES_PER_PIXEL, GVJ_s::height, GVJ_s::imagedata, is_space(), NULL, rgb_to_grayscale(), and GVJ_s::width.

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rgb_to_grayscale()

static int rgb_to_grayscale ( unsigned  red, unsigned  green, unsigned  blue  )

static

use “perceptual” scaling, https://en.wikipedia.org/wiki/Grayscale#Colorimetric_(perceptual_luminance-preserving)_conversion_to_grayscale

Definition at line 19 of file gvplugin_ascii.c.

Referenced by process().

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Variable Documentation

apis

gvplugin_api_t apis[] = {{API_device, device_types}, {0}}

static

Definition at line 127 of file gvplugin_ascii.c.

Referenced by gvconfig_plugin_install_from_library(), and gvplugin_load().

device_features

gvdevice_features_t device_features

static

Initial value:

= {
    .default_dpi = {96, 96},
}

Definition at line 118 of file gvplugin_ascii.c.

device_types

gvplugin_installed_t device_types[]

static

Initial value:

= {
    {1, "ascii:cairo", 0, &engine, &device_features},
    {0},
}

Definition at line 122 of file gvplugin_ascii.c.

engine

gvdevice_engine_t engine

static

Initial value:

= {
    .format = process,
}

Definition at line 114 of file gvplugin_ascii.c.

Referenced by gvLayout(), layout(), and tcldot_layout().

gvplugin_ascii_LTX_library

GVPLUGIN_ASCII_API gvplugin_library_t gvplugin_ascii_LTX_library

Initial value:

= {"ascii",
                                                                    apis}

Definition at line 135 of file gvplugin_ascii.c.