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gzdoom/src/v_text.cpp

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/*
** v_text.cpp
** Draws text to a canvas. Also has a text line-breaker thingy.
**
**---------------------------------------------------------------------------
** Copyright 1998-2006 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"
#include "gstrings.h"
#include "vm.h"
int ListGetInt(VMVa_List &tags);
//==========================================================================
//
// DrawChar
//
// Write a single character using the given font
//
//==========================================================================
void DCanvas::DrawChar (FFont *font, int normalcolor, double x, double y, int character, int tag_first, ...)
{
if (font == NULL)
return;
if (normalcolor >= NumTextColors)
normalcolor = CR_UNTRANSLATED;
FTexture *pic;
int dummy;
if (NULL != (pic = font->GetChar (character, &dummy)))
{
DrawParms parms;
Va_List tags;
va_start(tags.list, tag_first);
bool res = ParseDrawTextureTags(pic, x, y, tag_first, tags, &parms, false);
va_end(tags.list);
if (!res)
{
return;
}
PalEntry color = 0xffffffff;
parms.remap = font->GetColorTranslation((EColorRange)normalcolor, &color);
parms.color = PalEntry((color.a * parms.color.a) / 255, (color.r * parms.color.r) / 255, (color.g * parms.color.g) / 255, (color.b * parms.color.b) / 255);
DrawTextureParms(pic, parms);
}
}
void DCanvas::DrawChar(FFont *font, int normalcolor, double x, double y, int character, VMVa_List &args)
{
if (font == NULL)
return;
if (normalcolor >= NumTextColors)
normalcolor = CR_UNTRANSLATED;
FTexture *pic;
int dummy;
if (NULL != (pic = font->GetChar(character, &dummy)))
{
DrawParms parms;
uint32_t tag = ListGetInt(args);
bool res = ParseDrawTextureTags(pic, x, y, tag, args, &parms, false);
if (!res) return;
PalEntry color = 0xffffffff;
parms.remap = font->GetColorTranslation((EColorRange)normalcolor, &color);
parms.color = PalEntry((color.a * parms.color.a) / 255, (color.r * parms.color.r) / 255, (color.g * parms.color.g) / 255, (color.b * parms.color.b) / 255);
DrawTextureParms(pic, parms);
}
}
DEFINE_ACTION_FUNCTION(_Screen, DrawChar)
{
PARAM_PROLOGUE;
PARAM_POINTER(font, FFont);
PARAM_INT(cr);
PARAM_FLOAT(x);
PARAM_FLOAT(y);
PARAM_INT(chr);
if (!screen->HasBegun2D()) ThrowAbortException(X_OTHER, "Attempt to draw to screen outside a draw function");
VMVa_List args = { param + 5, 0, numparam - 5 };
screen->DrawChar(font, cr, x, y, chr, args);
return 0;
}
//==========================================================================
//
// DrawText
//
// Write a string using the given font
//
//==========================================================================
void DCanvas::DrawTextCommon(FFont *font, int normalcolor, double x, double y, const char *string, DrawParms &parms)
{
int w;
const uint8_t *ch;
int c;
double cx;
double cy;
int boldcolor;
FRemapTable *range;
int kerning;
FTexture *pic;
assert(string[0] != '$');
if (parms.celly == 0) parms.celly = font->GetHeight() + 1;
parms.celly *= parms.scaley;
if (normalcolor >= NumTextColors)
normalcolor = CR_UNTRANSLATED;
boldcolor = normalcolor ? normalcolor - 1 : NumTextColors - 1;
PalEntry colorparm = parms.color;
PalEntry color = 0xffffffff;
range = font->GetColorTranslation((EColorRange)normalcolor, &color);
parms.color = PalEntry(colorparm.a, (color.r * colorparm.r) / 255, (color.g * colorparm.g) / 255, (color.b * colorparm.b) / 255);
kerning = font->GetDefaultKerning();
ch = (const uint8_t *)string;
cx = x;
cy = y;
while ((const char *)ch - string < parms.maxstrlen)
{
c = *ch++;
if (!c)
break;
if (c == TEXTCOLOR_ESCAPE)
{
EColorRange newcolor = V_ParseFontColor(ch, normalcolor, boldcolor);
if (newcolor != CR_UNDEFINED)
{
range = font->GetColorTranslation(newcolor, &color);
parms.color = PalEntry(colorparm.a, (color.r * colorparm.r) / 255, (color.g * colorparm.g) / 255, (color.b * colorparm.b) / 255);
}
continue;
}
if (c == '\n')
{
cx = x;
cy += parms.celly;
continue;
}
if (NULL != (pic = font->GetChar(c, &w)))
{
parms.remap = range;
SetTextureParms(&parms, pic, cx, cy);
if (parms.cellx)
{
w = parms.cellx;
parms.destwidth = parms.cellx;
parms.destheight = parms.celly;
}
DrawTextureParms(pic, parms);
}
cx += (w + kerning) * parms.scalex;
}
}
void DCanvas::DrawText(FFont *font, int normalcolor, double x, double y, const char *string, int tag_first, ...)
{
Va_List tags;
DrawParms parms;
if (font == NULL || string == NULL)
return;
va_start(tags.list, tag_first);
bool res = ParseDrawTextureTags(nullptr, 0, 0, tag_first, tags, &parms, true);
va_end(tags.list);
if (!res)
{
return;
}
DrawTextCommon(font, normalcolor, x, y, string, parms);
}
void DCanvas::DrawText(FFont *font, int normalcolor, double x, double y, const char *string, VMVa_List &args)
{
DrawParms parms;
if (font == NULL || string == NULL)
return;
uint32_t tag = ListGetInt(args);
bool res = ParseDrawTextureTags(nullptr, 0, 0, tag, args, &parms, true);
if (!res)
{
return;
}
DrawTextCommon(font, normalcolor, x, y, string, parms);
}
DEFINE_ACTION_FUNCTION(_Screen, DrawText)
{
PARAM_PROLOGUE;
PARAM_POINTER(font, FFont);
PARAM_INT(cr);
PARAM_FLOAT(x);
PARAM_FLOAT(y);
PARAM_STRING(chr);
if (!screen->HasBegun2D()) ThrowAbortException(X_OTHER, "Attempt to draw to screen outside a draw function");
VMVa_List args = { param + 5, 0, numparam - 5 };
const char *txt = chr[0] == '$' ? GStrings(&chr[1]) : chr.GetChars();
screen->DrawText(font, cr, x, y, txt, args);
return 0;
}
//==========================================================================
//
// Break long lines of text into multiple lines no longer than maxwidth pixels
//
//==========================================================================
static void breakit (FBrokenLines *line, FFont *font, const uint8_t *start, const uint8_t *stop, FString &linecolor)
{
if (!linecolor.IsEmpty())
{
line->Text = TEXTCOLOR_ESCAPE;
line->Text += linecolor;
}
line->Text.AppendCStrPart ((const char *)start, stop - start);
line->Width = font->StringWidth (line->Text);
}
FBrokenLines *V_BreakLines (FFont *font, int maxwidth, const uint8_t *string, bool preservecolor, unsigned int *count)
{
TArray<FBrokenLines> Lines(128);
const uint8_t *space = NULL, *start = string;
int c, w, nw;
FString lastcolor, linecolor;
bool lastWasSpace = false;
int kerning = font->GetDefaultKerning ();
w = 0;
while ( (c = *string++) )
{
if (c == TEXTCOLOR_ESCAPE)
{
if (*string)
{
if (*string == '[')
{
const uint8_t *start = string;
while (*string != ']' && *string != '\0')
{
string++;
}
if (*string != '\0')
{
string++;
}
lastcolor = FString((const char *)start, string - start);
}
else
{
lastcolor = *string++;
}
}
continue;
}
if (isspace(c))
{
if (!lastWasSpace)
{
space = string - 1;
lastWasSpace = true;
}
}
else
{
lastWasSpace = false;
}
nw = font->GetCharWidth (c);
if ((w > 0 && w + nw > maxwidth) || c == '\n')
{ // Time to break the line
if (!space)
space = string - 1;
auto index = Lines.Reserve(1);
breakit (&Lines[index], font, start, space, linecolor);
if (c == '\n' && !preservecolor)
{
lastcolor = ""; // Why, oh why, did I do it like this?
}
linecolor = lastcolor;
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;
}
}
// String here is pointing one character after the '\0'
if (--string - start >= 1)
{
const uint8_t *s = start;
while (s < string)
{
// If there is any non-white space in the remainder of the string, add it.
if (!isspace (*s++))
{
auto i = Lines.Reserve(1);
breakit (&Lines[i], font, start, string, linecolor);
break;
}
}
}
// Make a copy of the broken lines and return them
FBrokenLines *broken = new FBrokenLines[Lines.Size() + 1];
for (unsigned ii = 0; ii < Lines.Size(); ++ii)
{
broken[ii] = Lines[ii];
}
broken[Lines.Size()].Width = -1;
if (count != nullptr)
{
*count = Lines.Size();
}
return broken;
}
void V_FreeBrokenLines (FBrokenLines *lines)
{
if (lines)
{
delete[] lines;
}
}
class DBrokenLines : public DObject
{
DECLARE_ABSTRACT_CLASS(DBrokenLines, DObject)
public:
FBrokenLines *mBroken;
unsigned int mCount;
DBrokenLines(FBrokenLines *broken, unsigned int count)
{
mBroken = broken;
mCount = count;
}
void OnDestroy() override
{
V_FreeBrokenLines(mBroken);
}
};
IMPLEMENT_CLASS(DBrokenLines, true, false);
DEFINE_ACTION_FUNCTION(DBrokenLines, Count)
{
PARAM_SELF_PROLOGUE(DBrokenLines);
ACTION_RETURN_INT(self->mCount);
}
DEFINE_ACTION_FUNCTION(DBrokenLines, StringWidth)
{
PARAM_SELF_PROLOGUE(DBrokenLines);
PARAM_INT(index);
ACTION_RETURN_INT((unsigned)index >= self->mCount? -1 : self->mBroken[index].Width);
}
DEFINE_ACTION_FUNCTION(DBrokenLines, StringAt)
{
PARAM_SELF_PROLOGUE(DBrokenLines);
PARAM_INT(index);
ACTION_RETURN_STRING((unsigned)index >= self->mCount? -1 : self->mBroken[index].Text);
}
DEFINE_ACTION_FUNCTION(FFont, BreakLines)
{
PARAM_SELF_STRUCT_PROLOGUE(FFont);
PARAM_STRING(text);
PARAM_INT(maxwidth);
unsigned int count;
FBrokenLines *broken = V_BreakLines(self, maxwidth, text, true, &count);
ACTION_RETURN_OBJECT(Create<DBrokenLines>(broken, count));
}
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