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qzdoom/src/v_text.cpp

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/*
** v_text.cpp
** Draws text to a canvas. Also has a text line-breaker thingy.
**
**---------------------------------------------------------------------------
** Copyright 1998-2005 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include "v_text.h"
#include "i_system.h"
#include "v_video.h"
#include "hu_stuff.h"
#include "w_wad.h"
#include "m_swap.h"
#include "doomstat.h"
#include "templates.h"
//
// SetFont
//
// Set the canvas's font
//
void DCanvas::SetFont (FFont *font)
{
Font = font;
}
void STACK_ARGS DCanvas::DrawChar (int normalcolor, int x, int y, byte character, ...)
{
if (Font == NULL)
return;
if (normalcolor >= NUM_TEXT_COLORS)
normalcolor = CR_UNTRANSLATED;
FTexture *pic;
int dummy;
if (NULL != (pic = Font->GetChar (character, &dummy)))
{
const BYTE *range = Font->GetColorTranslation ((EColorRange)normalcolor);
va_list taglist;
va_start (taglist, character);
DrawTexture (pic, x, y, DTA_Translation, range, TAG_MORE, taglist);
va_end (taglist);
}
}
//
// DrawText
//
// Write a string using the current font
//
void STACK_ARGS DCanvas::DrawText (int normalcolor, int x, int y, const char *string, ...)
{
va_list tags;
DWORD tag;
BOOL boolval;
int w, maxwidth;
const byte *ch;
int c;
int cx;
int cy;
int boldcolor;
const byte *range;
int height;
int scalex, scaley;
int kerning;
FTexture *pic;
if (Font == NULL || string == NULL)
return;
if (normalcolor >= NUM_TEXT_COLORS)
normalcolor = CR_UNTRANSLATED;
boldcolor = normalcolor ? normalcolor - 1 : NUM_TEXT_COLORS - 1;
range = Font->GetColorTranslation ((EColorRange)normalcolor);
height = Font->GetHeight () + 1;
kerning = Font->GetDefaultKerning ();
ch = (const byte *)string;
cx = x;
cy = y;
// Parse the tag list to see if we need to adjust for scaling.
maxwidth = Width;
scalex = scaley = 1;
va_start (tags, string);
tag = va_arg (tags, DWORD);
while (tag != TAG_DONE)
{
va_list more_p;
DWORD data;
void *ptrval;
switch (tag)
{
case TAG_IGNORE:
default:
data = va_arg (tags, DWORD);
break;
case TAG_MORE:
more_p = va_arg (tags, va_list);
va_end (tags);
tags = more_p;
break;;
case DTA_DestWidth:
case DTA_DestHeight:
*(DWORD *)tags = TAG_IGNORE;
data = va_arg (tags, DWORD);
break;
case DTA_Translation:
*(DWORD *)tags = TAG_IGNORE;
ptrval = va_arg (tags, void*);
break;
case DTA_CleanNoMove:
boolval = va_arg (tags, BOOL);
if (boolval)
{
scalex = CleanXfac;
scaley = CleanYfac;
maxwidth = Width - (Width % CleanYfac);
}
break;
case DTA_Clean:
case DTA_320x200:
boolval = va_arg (tags, BOOL);
if (boolval)
{
scalex = scaley = 1;
maxwidth = 320;
}
break;
case DTA_VirtualWidth:
maxwidth = va_arg (tags, int);
scalex = scaley = 1;
break;
}
tag = va_arg (tags, DWORD);
}
height *= scaley;
for (;;)
{
c = *ch++;
if (!c)
break;
if (c == TEXTCOLOR_ESCAPE)
{
int newcolor = toupper(*ch++);
if (newcolor == 0)
{
return;
}
else if (newcolor == '-')
{
newcolor = normalcolor;
}
else if (newcolor >= 'A' && newcolor < NUM_TEXT_COLORS + 'A')
{
newcolor -= 'A';
}
else if (newcolor == '+')
{
newcolor = boldcolor;
}
else
{
continue;
}
range = Font->GetColorTranslation ((EColorRange)newcolor);
continue;
}
if (c == '\n')
{
cx = x;
cy += height;
continue;
}
if (NULL != (pic = Font->GetChar (c, &w)))
{
va_list taglist;
va_start (taglist, string);
DrawTexture (pic, cx, cy, DTA_Translation, range, TAG_MORE, taglist);
va_end (taglist);
}
cx += (w + kerning) * scalex;
}
}
//
// Find string width using this font
//
int FFont::StringWidth (const BYTE *string) const
{
int w = 0;
int maxw = 0;
while (*string)
{
if (*string == TEXTCOLOR_ESCAPE)
{
if (*(++string))
++string;
continue;
}
else if (*string == '\n')
{
if (w > maxw)
maxw = w;
w = 0;
++string;
}
else
{
w += GetCharWidth (*string++) + GlobalKerning;
}
}
return MAX (maxw, w);
}
//
// Break long lines of text into multiple lines no longer than maxwidth pixels
//
static void breakit (brokenlines_t *line, const byte *start, const byte *string, bool keepspace, char linecolor)
{
int extra;
// Leave out trailing white space
if (!keepspace)
{
while (string > start && isspace (*(string - 1)))
string--;
}
if (linecolor == 0)
{
extra = 0;
}
else
{
extra = 2;
}
line->string = new char[string - start + extra + 1];
if (linecolor)
{
line->string[0] = TEXTCOLOR_ESCAPE;
line->string[1] = linecolor;
}
strncpy (line->string + extra, (char *)start, string - start);
line->string[string - start + extra] = 0;
line->width = screen->Font->StringWidth (line->string);
}
brokenlines_t *V_BreakLines (int maxwidth, const byte *string, bool keepspace)
{
brokenlines_t lines[128]; // Support up to 128 lines (should be plenty)
const byte *space = NULL, *start = string;
int i, c, w, nw;
char lastcolor = 0, linecolor = 0;
BOOL lastWasSpace = false;
int kerning = screen->Font->GetDefaultKerning ();
i = w = 0;
while ( (c = *string++) && i < 128 )
{
if (c == TEXTCOLOR_ESCAPE)
{
if (*string)
{
lastcolor = *string++;
}
continue;
}
if (isspace(c))
{
if (!lastWasSpace)
{
space = string - 1;
lastWasSpace = true;
}
}
else
{
lastWasSpace = false;
}
nw = screen->Font->GetCharWidth (c);
if ((w > 0 && w + nw > maxwidth) || c == '\n')
{ // Time to break the line
if (!space)
space = string - 1;
lines[i].nlterminated = (c == '\n');
breakit (&lines[i], start, space, keepspace, linecolor);
if (c == '\n')
{
linecolor = lastcolor = 0;
}
else
{
linecolor = lastcolor;
}
i++;
w = 0;
lastWasSpace = false;
start = space;
space = NULL;
while (*start && isspace (*start) && *start != '\n')
start++;
if (*start == '\n')
start++;
else
while (*start && isspace (*start))
start++;
string = start;
}
else
{
w += nw + kerning;
}
}
if (string - start > 1)
{
const byte *s = start;
while (s < string)
{
if (keepspace || !isspace (*s))
{
lines[i].nlterminated = (*s == '\n');
s++;
breakit (&lines[i++], start, string, keepspace, linecolor);
break;
}
s++;
}
}
{
// Make a copy of the broken lines and return them
brokenlines_t *broken = new brokenlines_t[i+1];
memcpy (broken, lines, sizeof(brokenlines_t) * i);
broken[i].string = NULL;
broken[i].width = -1;
return broken;
}
}
void V_FreeBrokenLines (brokenlines_t *lines)
{
if (lines)
{
int i = 0;
while (lines[i].width != -1)
{
delete[] lines[i].string;
lines[i].string = NULL;
i++;
}
delete[] lines;
}
}
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