forked from KolibriOS/kolibrios
276 lines
8.5 KiB
C
276 lines
8.5 KiB
C
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/*
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* OpenTyrian: A modern cross-platform port of Tyrian
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* Copyright (C) 2007-2009 The OpenTyrian Development Team
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "font.h"
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#include "fonthand.h"
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#include "sprite.h"
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/**
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* \file font.c
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* \brief Text drawing routines.
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*/
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/**
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* \brief Draws text in a color specified by hue and value and with a drop
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* shadow.
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*
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* A '~' in the text is not drawn but instead toggles highlighting which
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* increases \c value by 4.
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*
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* \li like JE_dString() if (black == false && shadow_dist == 2 && hue == 15)
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* \li like JE_textShade() with PART_SHADE if (black == true && shadow_dist == 1)
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* \li like JE_outTextAndDarken() if (black == false && shadow_dist == 1)
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* \li like JE_outTextAdjust() with shadow if (black == false && shadow_dist == 2)
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*
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* @param surface destination surface
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* @param x initial x-position in pixels; which direction(s) the text is drawn
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* from this position depends on the alignment
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* @param y initial upper y-position in pixels
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* @param text text to be drawn
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* @param font style/size of text
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* @param alignment left_aligned, centered, or right_aligned
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* @param hue hue component of text color
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* @param value value component of text color
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* @param black if true the shadow is drawn as solid black, if false the shadow
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* is drawn by darkening the pixels of the destination surface
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* @param shadow_dist distance in pixels that the shadow will be drawn away from
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* the text. (This is added to both the x and y positions, so a value of
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* 1 causes the shadow to be drawn 1 pixel right and 1 pixel lower than
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* the text.)
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*/
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void draw_font_hv_shadow( SDL_Surface *surface, int x, int y, const char *text, Font font, FontAlignment alignment, Uint8 hue, Sint8 value, bool black, int shadow_dist )
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{
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draw_font_dark(surface, x + shadow_dist, y + shadow_dist, text, font, alignment, black);
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draw_font_hv(surface, x, y, text, font, alignment, hue, value);
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}
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/**
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* \brief Draws text in a color specified by hue and value and with a
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* surrounding shadow.
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*
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* A '~' in the text is not drawn but instead toggles highlighting which
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* increases \c value by 4.
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*
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* \li like JE_textShade() with FULL_SHADE if (black == true && shadow_dist == 1)
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*
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* @param surface destination surface
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* @param x initial x-position in pixels; which direction(s) the text is drawn
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* from this position depends on the alignment
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* @param y initial upper y-position in pixels
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* @param text text to be drawn
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* @param font style/size of text
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* @param alignment left_aligned, centered, or right_aligned
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* @param hue hue component of text color
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* @param value value component of text color
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* @param black if true the shadow is drawn as solid black, if false the shadow
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* is drawn by darkening the pixels of the destination surface
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* @param shadow_dist distance in pixels that the shadows will be drawn away
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* from the text. (This distance is separately added to and subtracted
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* from the x position and y position, resulting in four shadows -- one
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* in each cardinal direction. If this shadow distance is small enough,
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* this produces a shadow that outlines the text.)
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*/
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void draw_font_hv_full_shadow( SDL_Surface *surface, int x, int y, const char *text, Font font, FontAlignment alignment, Uint8 hue, Sint8 value, bool black, int shadow_dist )
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{
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draw_font_dark(surface, x, y - shadow_dist, text, font, alignment, black);
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draw_font_dark(surface, x + shadow_dist, y, text, font, alignment, black);
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draw_font_dark(surface, x, y + shadow_dist, text, font, alignment, black);
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draw_font_dark(surface, x - shadow_dist, y, text, font, alignment, black);
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draw_font_hv(surface, x, y, text, font, alignment, hue, value);
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}
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/**
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* \brief Draws text in a color specified by hue and value.
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*
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* A '~' in the text is not drawn but instead toggles highlighting which
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* increases \c value by 4.
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*
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* \li like JE_outText() with (brightness >= 0)
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* \li like JE_outTextAdjust() without shadow
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*
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* @param surface destination surface
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* @param x initial x-position in pixels; which direction(s) the text is drawn
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* from this position depends on the alignment
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* @param y initial upper y-position in pixels
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* @param text text to be drawn
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* @param font style/size of text
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* @param alignment left_aligned, centered, or right_aligned
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* @param hue hue component of text color
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* @param value value component of text color
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*/
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void draw_font_hv( SDL_Surface *surface, int x, int y, const char *text, Font font, FontAlignment alignment, Uint8 hue, Sint8 value )
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{
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switch (alignment)
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{
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case left_aligned:
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break;
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case centered:
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x -= JE_textWidth(text, font) / 2;
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break;
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case right_aligned:
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x -= JE_textWidth(text, font);
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break;
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}
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bool highlight = false;
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for (; *text != '\0'; ++text)
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{
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int sprite_id = font_ascii[(unsigned char)*text];
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switch (*text)
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{
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case ' ':
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x += 6;
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break;
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case '~':
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highlight = !highlight;
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if (highlight)
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value += 4;
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else
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value -= 4;
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break;
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default:
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if (sprite_id != -1 && sprite_exists(font, sprite_id))
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{
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blit_sprite_hv(surface, x, y, font, sprite_id, hue, value);
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x += sprite(font, sprite_id)->width + 1;
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}
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break;
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}
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}
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}
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/**
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* \brief Draws blended text in a color specified by hue and value.
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*
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* Corresponds to blit_sprite_hv_blend()
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*
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* \li like JE_outTextModify()
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*
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* @param surface destination surface
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* @param x initial x-position in pixels; which direction(s) the text is drawn
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* from this position depends on the alignment
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* @param y initial upper y-position in pixels
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* @param text text to be drawn
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* @param font style/size of text
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* @param alignment left_aligned, centered, or right_aligned
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* @param hue hue component of text color
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* @param value value component of text color
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*/
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void draw_font_hv_blend( SDL_Surface *surface, int x, int y, const char *text, Font font, FontAlignment alignment, Uint8 hue, Sint8 value )
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{
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switch (alignment)
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{
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case left_aligned:
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break;
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case centered:
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x -= JE_textWidth(text, font) / 2;
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break;
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case right_aligned:
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x -= JE_textWidth(text, font);
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break;
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}
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for (; *text != '\0'; ++text)
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{
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int sprite_id = font_ascii[(unsigned char)*text];
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switch (*text)
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{
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case ' ':
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x += 6;
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break;
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case '~':
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break;
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default:
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if (sprite_id != -1 && sprite_exists(font, sprite_id))
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{
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blit_sprite_hv_blend(surface, x, y, font, sprite_id, hue, value);
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x += sprite(font, sprite_id)->width + 1;
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}
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break;
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}
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}
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}
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/**
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* \brief Draws darkened text.
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*
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* Corresponds to blit_sprite_dark()
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*
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* \li like JE_outText() with (brightness < 0) if (black == true)
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*
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* @param surface destination surface
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* @param x initial x-position in pixels; which direction(s) the text is drawn
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* from this position depends on the alignment
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* @param y initial upper y-position in pixels
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* @param text text to be drawn
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* @param font style/size of text
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* @param alignment left_aligned, centered, or right_aligned
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* @param black if true text is drawn as solid black, if false text is drawn by
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* darkening the pixels of the destination surface
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*/
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void draw_font_dark( SDL_Surface *surface, int x, int y, const char *text, Font font, FontAlignment alignment, bool black )
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{
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switch (alignment)
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{
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case left_aligned:
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break;
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case centered:
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x -= JE_textWidth(text, font) / 2;
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break;
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case right_aligned:
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x -= JE_textWidth(text, font);
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break;
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}
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for (; *text != '\0'; ++text)
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{
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int sprite_id = font_ascii[(unsigned char)*text];
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switch (*text)
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{
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case ' ':
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x += 6;
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break;
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case '~':
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break;
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default:
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if (sprite_id != -1 && sprite_exists(font, sprite_id))
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{
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blit_sprite_dark(surface, x, y, font, sprite_id, black);
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x += sprite(font, sprite_id)->width + 1;
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}
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break;
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}
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}
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}
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