mirror of
https://github.com/ZDoom/qzdoom.git
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e4728ba6f0
can't pass it to DrawTexture with a simple TAG_MORE. (Not sure why I thought the initial tag needed to be separate, though it did catch one case where it wasn't provided.) SVN r3351 (trunk)
461 lines
9.8 KiB
C++
461 lines
9.8 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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// DrawChar
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//
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// Write a single character using the given font
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//
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void STACK_ARGS DCanvas::DrawChar (FFont *font, 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 >= NumTextColors)
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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 FRemapTable *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 given font
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//
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void DCanvas::DrawTextV(FFont *font, int normalcolor, int x, int y, const char *string, va_list taglist)
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{
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INTBOOL boolval;
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va_list tags;
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uint32 tag;
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int maxstrlen = INT_MAX;
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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 FRemapTable *range;
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int height;
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int forcedwidth = 0;
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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 >= NumTextColors)
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normalcolor = CR_UNTRANSLATED;
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boldcolor = normalcolor ? normalcolor - 1 : NumTextColors - 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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#ifndef NO_VA_COPY
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va_copy(tags, taglist);
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#else
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tags = taglist;
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#endif
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tag = va_arg(tags, uint32);
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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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#ifndef NO_VA_COPY
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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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// We don't handle these. :(
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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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// Translation is specified explicitly by the text.
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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_1:
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boolval = va_arg (tags, INTBOOL);
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if (boolval)
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{
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scalex = CleanXfac_1;
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scaley = CleanYfac_1;
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maxwidth = Width - (Width % scalex);
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}
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break;
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case DTA_CleanNoMove:
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boolval = va_arg (tags, INTBOOL);
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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 % scalex);
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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, INTBOOL);
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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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case DTA_TextLen:
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maxstrlen = va_arg (tags, int);
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break;
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case DTA_CellX:
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forcedwidth = va_arg (tags, int);
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break;
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case DTA_CellY:
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height = va_arg (tags, int);
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break;
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}
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tag = va_arg (tags, uint32);
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}
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va_end(tags);
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height *= scaley;
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while ((const char *)ch - string < maxstrlen)
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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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EColorRange newcolor = V_ParseFontColor (ch, normalcolor, boldcolor);
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if (newcolor != CR_UNDEFINED)
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{
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range = font->GetColorTranslation (newcolor);
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}
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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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#ifndef NO_VA_COPY
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va_copy(tags, taglist);
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#else
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tags = taglist;
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#endif
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if (forcedwidth)
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{
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w = forcedwidth;
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DrawTexture (pic, cx, cy,
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DTA_Translation, range,
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DTA_DestWidth, forcedwidth,
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DTA_DestHeight, height,
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TAG_MORE, &tags);
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}
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else
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{
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DrawTexture (pic, cx, cy,
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DTA_Translation, range,
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TAG_MORE, &tags);
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}
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va_end (tags);
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}
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cx += (w + kerning) * scalex;
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}
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va_end(taglist);
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}
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void STACK_ARGS DCanvas::DrawText (FFont *font, int normalcolor, int x, int y, const char *string, ...)
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{
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va_list tags;
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va_start(tags, string);
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DrawTextV(font, normalcolor, x, y, string, tags);
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}
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// A synonym so that this can still be used in files that #include Windows headers
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void STACK_ARGS DCanvas::DrawTextA (FFont *font, int normalcolor, int x, int y, const char *string, ...)
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{
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va_list tags;
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va_start(tags, string);
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DrawTextV(font, normalcolor, x, y, string, tags);
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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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++string;
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if (*string == '[')
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{
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while (*string != '\0' && *string != ']')
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{
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++string;
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}
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}
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if (*string != '\0')
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{
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++string;
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}
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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 (FBrokenLines *line, FFont *font, const BYTE *start, const BYTE *stop, FString &linecolor)
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{
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if (!linecolor.IsEmpty())
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{
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line->Text = TEXTCOLOR_ESCAPE;
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line->Text += linecolor;
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}
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line->Text.AppendCStrPart ((const char *)start, stop - start);
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line->Width = font->StringWidth (line->Text);
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}
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FBrokenLines *V_BreakLines (FFont *font, int maxwidth, const BYTE *string)
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{
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FBrokenLines lines[128]; // Support up to 128 lines (should be plenty)
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const BYTE *space = NULL, *start = string;
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size_t i, ii;
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int c, w, nw;
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FString lastcolor, linecolor;
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bool lastWasSpace = false;
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int kerning = font->GetDefaultKerning ();
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i = w = 0;
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while ( (c = *string++) && i < countof(lines) )
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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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if (*string == '[')
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{
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const BYTE *start = string;
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while (*string != ']' && *string != '\0')
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{
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string++;
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}
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if (*string != '\0')
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{
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string++;
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}
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lastcolor = FString((const char *)start, string - start);
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}
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else
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{
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lastcolor = *string++;
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}
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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 = 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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breakit (&lines[i], font, start, space, linecolor);
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if (c == '\n')
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{
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lastcolor = ""; // Why, oh why, did I do it like this?
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}
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linecolor = lastcolor;
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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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// String here is pointing one character after the '\0'
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if (i < countof(lines) && --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 there is any non-white space in the remainder of the string, add it.
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if (!isspace (*s++))
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{
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breakit (&lines[i++], font, start, string, linecolor);
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break;
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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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FBrokenLines *broken = new FBrokenLines[i+1];
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for (ii = 0; ii < i; ++ii)
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{
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broken[ii] = lines[ii];
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}
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broken[ii].Width = -1;
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return broken;
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}
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void V_FreeBrokenLines (FBrokenLines *lines)
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{
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if (lines)
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{
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delete[] lines;
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}
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}
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