mirror of
https://github.com/ZDoom/gzdoom.git
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426 lines
8.7 KiB
C++
426 lines
8.7 KiB
C++
/*
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** v_text.cpp
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** Draws text to a canvas. Also has a text line-breaker thingy.
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2006 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#include <stdlib.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include "v_text.h"
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#include "i_system.h"
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#include "v_video.h"
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#include "hu_stuff.h"
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#include "w_wad.h"
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#include "m_swap.h"
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#include "doomstat.h"
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#include "templates.h"
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//
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// SetFont
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//
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// Set the canvas's font
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//
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void DCanvas::SetFont (FFont *font)
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{
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Font = font;
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}
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void STACK_ARGS DCanvas::DrawChar (int normalcolor, int x, int y, byte character, ...)
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{
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if (Font == NULL)
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return;
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if (normalcolor >= NUM_TEXT_COLORS)
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normalcolor = CR_UNTRANSLATED;
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FTexture *pic;
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int dummy;
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if (NULL != (pic = Font->GetChar (character, &dummy)))
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{
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const BYTE *range = Font->GetColorTranslation ((EColorRange)normalcolor);
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va_list taglist;
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va_start (taglist, character);
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DrawTexture (pic, x, y, DTA_Translation, range, TAG_MORE, &taglist);
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va_end (taglist);
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}
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}
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//
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// DrawText
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//
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// Write a string using the current font
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//
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void STACK_ARGS DCanvas::DrawText (int normalcolor, int x, int y, const char *string, ...)
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{
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va_list tags;
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DWORD tag;
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BOOL boolval;
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int w, maxwidth;
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const byte *ch;
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int c;
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int cx;
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int cy;
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int boldcolor;
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const byte *range;
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int height;
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int scalex, scaley;
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int kerning;
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FTexture *pic;
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if (Font == NULL || string == NULL)
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return;
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if (normalcolor >= NUM_TEXT_COLORS)
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normalcolor = CR_UNTRANSLATED;
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boldcolor = normalcolor ? normalcolor - 1 : NUM_TEXT_COLORS - 1;
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range = Font->GetColorTranslation ((EColorRange)normalcolor);
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height = Font->GetHeight () + 1;
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kerning = Font->GetDefaultKerning ();
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ch = (const byte *)string;
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cx = x;
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cy = y;
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// Parse the tag list to see if we need to adjust for scaling.
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maxwidth = Width;
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scalex = scaley = 1;
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va_start (tags, string);
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tag = va_arg (tags, DWORD);
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while (tag != TAG_DONE)
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{
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va_list *more_p;
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DWORD data;
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void *ptrval;
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switch (tag)
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{
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case TAG_IGNORE:
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default:
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data = va_arg (tags, DWORD);
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break;
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case TAG_MORE:
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more_p = va_arg (tags, va_list*);
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va_end (tags);
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#ifdef __GNUC__
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__va_copy (tags, *more_p);
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#else
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tags = *more_p;
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#endif
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break;
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case DTA_DestWidth:
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case DTA_DestHeight:
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*(DWORD *)tags = TAG_IGNORE;
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data = va_arg (tags, DWORD);
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break;
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case DTA_Translation:
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*(DWORD *)tags = TAG_IGNORE;
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ptrval = va_arg (tags, void*);
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break;
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case DTA_CleanNoMove:
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boolval = va_arg (tags, BOOL);
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if (boolval)
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{
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scalex = CleanXfac;
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scaley = CleanYfac;
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maxwidth = Width - (Width % CleanYfac);
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}
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break;
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case DTA_Clean:
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case DTA_320x200:
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boolval = va_arg (tags, BOOL);
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if (boolval)
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{
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scalex = scaley = 1;
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maxwidth = 320;
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}
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break;
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case DTA_VirtualWidth:
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maxwidth = va_arg (tags, int);
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scalex = scaley = 1;
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break;
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}
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tag = va_arg (tags, DWORD);
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}
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height *= scaley;
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for (;;)
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{
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c = *ch++;
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if (!c)
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break;
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if (c == TEXTCOLOR_ESCAPE)
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{
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int newcolor = toupper(*ch++);
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if (newcolor == 0)
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{
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return;
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}
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else if (newcolor == '-')
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{
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newcolor = normalcolor;
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}
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else if (newcolor >= 'A' && newcolor < NUM_TEXT_COLORS + 'A')
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{
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newcolor -= 'A';
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}
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else if (newcolor == '+')
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{
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newcolor = boldcolor;
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}
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else
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{
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continue;
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}
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range = Font->GetColorTranslation ((EColorRange)newcolor);
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continue;
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}
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if (c == '\n')
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{
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cx = x;
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cy += height;
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continue;
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}
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if (NULL != (pic = Font->GetChar (c, &w)))
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{
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va_list taglist;
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va_start (taglist, string);
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DrawTexture (pic, cx, cy, DTA_Translation, range, TAG_MORE, &taglist);
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va_end (taglist);
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}
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cx += (w + kerning) * scalex;
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}
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}
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//
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// Find string width using this font
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//
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int FFont::StringWidth (const BYTE *string) const
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{
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int w = 0;
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int maxw = 0;
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while (*string)
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{
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if (*string == TEXTCOLOR_ESCAPE)
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{
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if (*(++string))
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++string;
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continue;
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}
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else if (*string == '\n')
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{
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if (w > maxw)
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maxw = w;
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w = 0;
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++string;
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}
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else
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{
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w += GetCharWidth (*string++) + GlobalKerning;
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}
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}
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return MAX (maxw, w);
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}
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//
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// Break long lines of text into multiple lines no longer than maxwidth pixels
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//
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static void breakit (brokenlines_t *line, const byte *start, const byte *string, bool keepspace, char linecolor)
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{
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int extra;
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// Leave out trailing white space
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if (!keepspace)
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{
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while (string > start && isspace (*(string - 1)))
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string--;
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}
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if (linecolor == 0)
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{
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extra = 0;
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}
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else
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{
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extra = 2;
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}
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line->string = new char[string - start + extra + 1];
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if (linecolor)
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{
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line->string[0] = TEXTCOLOR_ESCAPE;
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line->string[1] = linecolor;
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}
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strncpy (line->string + extra, (char *)start, string - start);
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line->string[string - start + extra] = 0;
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line->width = screen->Font->StringWidth (line->string);
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}
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brokenlines_t *V_BreakLines (int maxwidth, const byte *string, bool keepspace)
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{
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brokenlines_t lines[128]; // Support up to 128 lines (should be plenty)
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const byte *space = NULL, *start = string;
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int i, c, w, nw;
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char lastcolor = 0, linecolor = 0;
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BOOL lastWasSpace = false;
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int kerning = screen->Font->GetDefaultKerning ();
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i = w = 0;
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while ( (c = *string++) && i < 128 )
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{
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if (c == TEXTCOLOR_ESCAPE)
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{
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if (*string)
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{
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lastcolor = *string++;
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}
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continue;
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}
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if (isspace(c))
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{
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if (!lastWasSpace)
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{
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space = string - 1;
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lastWasSpace = true;
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}
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}
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else
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{
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lastWasSpace = false;
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}
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nw = screen->Font->GetCharWidth (c);
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if ((w > 0 && w + nw > maxwidth) || c == '\n')
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{ // Time to break the line
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if (!space)
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space = string - 1;
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lines[i].nlterminated = (c == '\n');
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breakit (&lines[i], start, space, keepspace, linecolor);
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if (c == '\n')
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{
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linecolor = lastcolor = 0;
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}
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else
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{
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linecolor = lastcolor;
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}
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i++;
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w = 0;
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lastWasSpace = false;
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start = space;
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space = NULL;
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while (*start && isspace (*start) && *start != '\n')
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start++;
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if (*start == '\n')
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start++;
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else
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while (*start && isspace (*start))
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start++;
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string = start;
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}
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else
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{
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w += nw + kerning;
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}
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}
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if (string - start > 1)
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{
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const byte *s = start;
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while (s < string)
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{
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if (keepspace || !isspace (*s))
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{
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lines[i].nlterminated = (*s == '\n');
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s++;
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breakit (&lines[i++], start, string, keepspace, linecolor);
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break;
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}
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s++;
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}
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}
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{
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// Make a copy of the broken lines and return them
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brokenlines_t *broken = new brokenlines_t[i+1];
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memcpy (broken, lines, sizeof(brokenlines_t) * i);
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broken[i].string = NULL;
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broken[i].width = -1;
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return broken;
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}
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}
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void V_FreeBrokenLines (brokenlines_t *lines)
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{
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if (lines)
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{
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int i = 0;
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while (lines[i].width != -1)
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{
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delete[] lines[i].string;
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lines[i].string = NULL;
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i++;
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}
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delete[] lines;
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}
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}
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