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