netsurf/desktop/plot_style.h

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/*
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Plotter styles.
*/
#ifndef _NETSURF_DESKTOP_PLOT_STYLE_H_
#define _NETSURF_DESKTOP_PLOT_STYLE_H_
#include <stdint.h>
/* html widget colours */
#define WIDGET_BASEC 0xd9d9d9
#define WIDGET_BLOBC 0x000000
/* Darken a colour by taking three quarters of each channel's intensity */
#define darken_colour(c1) \
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((((3 * (c1 & 0xff00ff)) >> 2) & 0xff00ff) | \
(((3 * (c1 & 0x00ff00)) >> 2) & 0x00ff00))
/* Darken a colour by taking nine sixteenths of each channel's intensity */
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#define double_darken_colour(c1) \
((((9 * (c1 & 0xff00ff)) >> 4) & 0xff00ff) | \
(((9 * (c1 & 0x00ff00)) >> 4) & 0x00ff00))
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/* Lighten a colour by taking 12/16ths of each channel's intensity
* and adding a full 4/16ths intensity */
#define lighten_colour(c1) \
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(((((3 * (c1 & 0xff00ff)) >> 2) + 0x400040) & 0xff00ff) | \
((((3 * (c1 & 0x00ff00)) >> 2) + 0x004000) & 0x00ff00))
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/* Lighten a colour by taking 9/16ths of each channel's intensity
* and adding a full 7/16ths intensity */
#define double_lighten_colour(c1) \
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(((((9 * (c1 & 0xff00ff)) >> 4) + 0x700070) & 0xff00ff) | \
((((9 * (c1 & 0x00ff00)) >> 4) + 0x007000) & 0x00ff00))
/* Blend two colours by taking half the intensity of each channel in the first
* colour and adding them to half the intensity of each channel in the second
* colour */
#define blend_colour(c0, c1) \
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(((((c0 & 0xff00ff) + (c1 & 0xff00ff)) >> 1) & 0xff00ff) | \
((((c0 & 0x00ff00) + (c1 & 0x00ff00)) >> 1) & 0x00ff00))
/* Choose either black or white, depending on which is furthest from the
* percieved lightness of the supplied colour, c0. */
#define colour_to_bw_furthest(c0) \
((((((c0 & 0x0000ff) * 77) >> 8) + \
(((c0 & 0x00ff00) * 151) >> 16) + \
(((c0 & 0xff0000) * 28) >> 24)) > \
(0xff / 2)) ? 0x000000 : 0xffffff)
/* Mix two colours according to the proportion given by p, where 0 <= p <= 255
* p = 0 gives result ==> c1, p = 255 gives result ==> c0 */
#define mix_colour(c0, c1, p) \
((((((c1 & 0xff00ff) * (255 - p)) + \
((c0 & 0xff00ff) * ( p)) ) >> 8) & 0xff00ff) | \
(((((c1 & 0x00ff00) * (255 - p)) + \
((c0 & 0x00ff00) * ( p)) ) >> 8) & 0x00ff00))
/* get a bitmap pixel (image/bitmap.h) into a plot colour */
#define pixel_to_colour(b) \
b[0] | (b[1] << 8) | (b[2] << 16) | (b[3] << 24)
/* Get the red channel from a colour */
#define red_from_colour(c) \
((c ) & 0xff)
/* Get the green channel from a colour */
#define green_from_colour(c) \
((c >> 8) & 0xff)
/* Get the blue channel from a colour */
#define blue_from_colour(c) \
((c >> 16) & 0xff)
/**
* Colour type: XBGR
*/
typedef uint32_t colour;
/**
* Magical transparent value
*/
#define NS_TRANSPARENT 0x01000000
/**
* Type of plot operation
*/
typedef enum {
PLOT_OP_TYPE_NONE = 0, /**< No operation */
PLOT_OP_TYPE_SOLID, /**< Solid colour */
PLOT_OP_TYPE_DOT, /**< Dotted plot */
PLOT_OP_TYPE_DASH, /**< Dashed plot */
} plot_operation_type_t;
/**
* Plot style for stroke/fill plotters
*/
typedef struct {
plot_operation_type_t stroke_type; /**< Stroke plot type */
int stroke_width; /**< Width of stroke, in pixels */
colour stroke_colour; /**< Colour of stroke */
plot_operation_type_t fill_type; /**< Fill plot type */
colour fill_colour; /**< Colour of fill */
} plot_style_t;
/**
* Generic font family type
*/
typedef enum {
PLOT_FONT_FAMILY_SANS_SERIF = 0,
PLOT_FONT_FAMILY_SERIF,
PLOT_FONT_FAMILY_MONOSPACE,
PLOT_FONT_FAMILY_CURSIVE,
PLOT_FONT_FAMILY_FANTASY,
PLOT_FONT_FAMILY_COUNT /**< Number of generic families */
} plot_font_generic_family_t;
/**
* Font plot flags
*/
typedef unsigned long plot_font_flags_t;
#define FONTF_NONE 0
#define FONTF_ITALIC 1
#define FONTF_OBLIQUE 2
#define FONTF_SMALLCAPS 4
/**
* Scaling factor for font sizes
*/
#define FONT_SIZE_SCALE 1024
/**
* Font style for plotting
*/
typedef struct {
plot_font_generic_family_t family; /**< Generic family to plot with */
int size; /**< Font size, in points * FONT_SIZE_SCALE */
int weight; /**< Font weight: value in range [100,900] as per CSS */
plot_font_flags_t flags; /**< Font flags */
colour background; /**< Background colour to blend to, if appropriate */
colour foreground; /**< Colour of text */
} plot_font_style_t;
/* global fill styles */
extern plot_style_t *plot_style_fill_white;
extern plot_style_t *plot_style_fill_red;
extern plot_style_t *plot_style_fill_black;
/* Box model debug outline styles for content, padding and margin edges */
extern plot_style_t const * const plot_style_content_edge;
extern plot_style_t const * const plot_style_padding_edge;
extern plot_style_t const * const plot_style_margin_edge;
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/* Broken object replacement styles */
extern plot_style_t const * const plot_style_broken_object;
extern plot_font_style_t const * const plot_fstyle_broken_object;
/* other styles */
extern plot_style_t *plot_style_caret;
extern plot_style_t *plot_style_stroke_history;
extern plot_style_t *plot_style_fill_wbasec;
extern plot_style_t *plot_style_fill_darkwbasec;
extern plot_style_t *plot_style_fill_lightwbasec;
extern plot_style_t *plot_style_fill_wblobc;
extern plot_style_t *plot_style_stroke_wblobc;
extern plot_style_t *plot_style_stroke_darkwbasec;
extern plot_style_t *plot_style_stroke_lightwbasec;
/* Default font style */
extern plot_font_style_t const * const plot_style_font;
#ifndef HISTORY_COLOUR_SELECTED
#define HISTORY_COLOUR_SELECTED 0xFF0000
#endif
#ifndef HISTORY_COLOUR_FOREGROUND
#define HISTORY_COLOUR_FOREGROUND 0x333333
#endif
#ifndef HISTORY_COLOUR_BACKGROUND
#define HISTORY_COLOUR_BACKGROUND 0xFFFFFF
#endif
#ifndef HISTORY_COLOUR_LINES
#define HISTORY_COLOUR_LINES HISTORY_COLOUR_FOREGROUND
#endif
#endif