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raze-gles/source/common/2d/screentext.cpp
Christoph Oelckers 4788dc42fb - cleanup of the screentext consolidation 
Since SetIfGreater is only used by the text code, the redundant copies could be removed.
2020-03-05 01:17:31 +01:00

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//-------------------------------------------------------------------------
/*
Copyright (C) 2016 EDuke32 developers and contributors
Copyright (C) 2019 Christoph Oelckers
This file is part of Raze.
EDuke32 is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 2
as published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
//-------------------------------------------------------------------------
#include "screentext.h"
#include "build.h"
inline void SetIfGreater(int32_t *variable, int32_t potentialValue)
{
if (potentialValue > *variable)
*variable = potentialValue;
}
// get the string length until the next '\n'
int32_t G_GetStringLineLength(const char *text, const char *end, const int32_t iter)
{
int32_t length = 0;
while (text != end && *text != '\n')
{
++length;
text += iter;
}
return length;
}
int32_t G_GetStringNumLines(const char *text, const char *end, const int32_t iter)
{
int32_t count = 1;
while (text != end)
{
if (*text == '\n')
++count;
text += iter;
}
return count;
}
// Note: Neither of these care about TEXT_LINEWRAP. This is intended.
// This function requires you to Xfree() the returned char*.
char* G_GetSubString(const char *text, const char *end, const int32_t iter, const int32_t length)
{
char *line = (char*) Xmalloc((length+1) * sizeof(char));
int32_t counter = 0;
while (counter < length && text != end)
{
line[counter] = *text;
text += iter;
++counter;
}
line[counter] = '\0';
return line;
}
#define NUMHACKACTIVE ((f & TEXT_GAMETEXTNUMHACK) && t >= '0' && t <= '9')
#define USERQUOTE_RIGHTOFFSET 14
// qstrdim
vec2_t G_ScreenTextSize(const int32_t font,
int32_t x, int32_t y, const int32_t z, const int32_t blockangle,
const char *str, const int32_t o,
int32_t xspace, int32_t yline, int32_t xbetween, int32_t ybetween,
const int32_t f,
int32_t x1, int32_t y1, int32_t x2, int32_t y2)
{
vec2_t size = { 0, 0, }; // eventually the return value
vec2_t pos = { 0, 0, }; // holds the coordinate position as we draw each character tile of the string
vec2_t extent = { 0, 0, }; // holds the x-width of each character and the greatest y-height of each line
vec2_t offset = { 0, 0, }; // temporary; holds the last movement made in both directions
int32_t tile;
char t;
// set the start and end points depending on direction
int32_t iter = (f & TEXT_BACKWARDS) ? -1 : 1; // iteration direction
const char *end;
const char *text;
if (str == NULL)
return size;
end = (f & TEXT_BACKWARDS) ? str-1 : Bstrchr(str, '\0');
text = (f & TEXT_BACKWARDS) ? Bstrchr(str, '\0')-1 : str;
// optimization: justification in both directions
if ((f & TEXT_XJUSTIFY) && (f & TEXT_YJUSTIFY))
{
size.x = xbetween;
size.y = ybetween;
return size;
}
// for best results, we promote 320x200 coordinates to full precision before any math
if (!(o & ROTATESPRITE_FULL16))
{
x <<= 16;
y <<= 16;
xspace <<= 16;
yline <<= 16;
xbetween <<= 16;
ybetween <<= 16;
}
// coordinate values should be shifted left by 16
// handle zooming where applicable
xspace = mulscale16(xspace, z);
yline = mulscale16(yline, z);
xbetween = mulscale16(xbetween, z);
ybetween = mulscale16(ybetween, z);
// size/width/height/spacing/offset values should be multiplied or scaled by $z, zoom (since 100% is 65536, the same as 1<<16)
// loop through the string
while (text != end && (t = *text))
{
// handle escape sequences
if (t == '^' && Bisdigit(*(text+iter)) && !(f & TEXT_LITERALESCAPE))
{
text += iter + iter;
if (Bisdigit(*text))
text += iter;
continue;
}
// handle case bits
if (f & TEXT_UPPERCASE)
{
if (f & TEXT_INVERTCASE) // optimization...?
{ // v^ important that these two ifs remain separate due to the else below
if (Bisupper(t))
t = Btolower(t);
}
else if (Bislower(t))
t = Btoupper(t);
}
else if (f & TEXT_INVERTCASE)
{
if (Bisupper(t))
t = Btolower(t);
else if (Bislower(t))
t = Btoupper(t);
}
// translate the character to a tilenum
tile = gi->GetStringTile(font, &t, f);
// reset this here because we haven't printed anything yet this loop
extent.x = 0;
// reset this here because the act of printing something on this line means that we include the margin above in the total size
offset.y = 0;
// handle each character itself in the context of screen drawing
switch (t)
{
case '\t':
case ' ':
// width
extent.x = xspace;
if (f & (TEXT_INTERNALSPACE|TEXT_TILESPACE))
{
char space = '.'; // this is subject to change as an implementation detail
if (f & TEXT_TILESPACE)
space = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &space, f);
extent.x += (tilesiz[tile].x * z);
}
// prepare the height // near-CODEDUP the other two near-CODEDUPs for this section
{
int32_t tempyextent = yline;
if (f & (TEXT_INTERNALLINE|TEXT_TILELINE))
{
char line = 'A'; // this is subject to change as an implementation detail
if (f & TEXT_TILELINE)
line = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &line, f);
tempyextent += tilesiz[tile].y * z;
}
SetIfGreater(&extent.y, tempyextent);
}
if (t == '\t')
extent.x <<= 2; // *= 4
break;
case '\n': // near-CODEDUP "if (wrap)"
extent.x = 0;
// save the position
if (!(f & TEXT_XOFFSETZERO)) // we want the entire offset to count as the character width
pos.x -= offset.x;
SetIfGreater(&size.x, pos.x);
// reset the position
pos.x = 0;
// prepare the height
{
int32_t tempyextent = yline;
if (f & (TEXT_INTERNALLINE|TEXT_TILELINE))
{
char line = 'A'; // this is subject to change as an implementation detail
if (f & TEXT_TILELINE)
line = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &line, f);
tempyextent += tilesiz[tile].y * z;
}
SetIfGreater(&extent.y, tempyextent);
}
// move down the line height
if (!(f & TEXT_YOFFSETZERO))
pos.y += extent.y;
// reset the current height
extent.y = 0;
// line spacing
offset.y = (f & TEXT_YJUSTIFY) ? 0 : ybetween; // ternary to prevent overflow
pos.y += offset.y;
break;
default:
// width
extent.x = tilesiz[tile].x * z;
if (NUMHACKACTIVE)
{
char numeral = '0'; // this is subject to change as an implementation detail
extent.x = (tilesiz[gi->GetStringTile(font, &numeral, f)].x-1) * z;
}
// height
SetIfGreater(&extent.y, (tilesiz[tile].y * z));
break;
}
// incrementing the coordinate counters
offset.x = 0;
// advance the x coordinate
if (!(f & TEXT_XOFFSETZERO) || NUMHACKACTIVE)
offset.x += extent.x;
// account for text spacing
if (!NUMHACKACTIVE
&& t != '\n'
&& !(f & TEXT_XJUSTIFY)) // to prevent overflow
offset.x += xbetween;
// line wrapping
if ((f & TEXT_LINEWRAP) && !(f & TEXT_XRIGHT) && !(f & TEXT_XCENTER) && blockangle % 512 == 0)
{
int32_t wrap = 0;
const int32_t ang = blockangle % 2048;
// this is the only place in qstrdim where angle actually affects direction, but only in the wrapping measurement
switch (ang)
{
case 0:
wrap = (x + (pos.x + offset.x) > ((o & 2) ? (320<<16) : ((x2 - USERQUOTE_RIGHTOFFSET)<<16)));
break;
case 512:
wrap = (y + (pos.x + offset.x) > ((o & 2) ? (200<<16) : ((y2 - USERQUOTE_RIGHTOFFSET)<<16)));
break;
case 1024:
wrap = (x - (pos.x + offset.x) < ((o & 2) ? 0 : ((x1 + USERQUOTE_RIGHTOFFSET)<<16)));
break;
case 1536:
wrap = (y - (pos.x + offset.x) < ((o & 2) ? 0 : ((y1 + USERQUOTE_RIGHTOFFSET)<<16)));
break;
}
if (wrap) // near-CODEDUP "case '\n':"
{
// save the position
SetIfGreater(&size.x, pos.x);
// reset the position
pos.x = 0;
// prepare the height
{
int32_t tempyextent = yline;
if (f & (TEXT_INTERNALLINE|TEXT_TILELINE))
{
char line = 'A'; // this is subject to change as an implementation detail
if (f & TEXT_TILELINE)
line = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &line, f);
tempyextent += tilesiz[tile].y * z;
}
SetIfGreater(&extent.y, tempyextent);
}
// move down the line height
if (!(f & TEXT_YOFFSETZERO))
pos.y += extent.y;
// reset the current height
extent.y = 0;
// line spacing
offset.y = (f & TEXT_YJUSTIFY) ? 0 : ybetween; // ternary to prevent overflow
pos.y += offset.y;
}
else
pos.x += offset.x;
}
else
pos.x += offset.x;
// save some trouble with calculation in case the line breaks
if (!(f & TEXT_XOFFSETZERO) || NUMHACKACTIVE)
offset.x -= extent.x;
// iterate to the next character in the string
text += iter;
}
// calculate final size
if (!(f & TEXT_XOFFSETZERO))
pos.x -= offset.x;
if (!(f & TEXT_YOFFSETZERO))
{
pos.y -= offset.y;
pos.y += extent.y;
}
else
pos.y += ybetween;
SetIfGreater(&size.x, pos.x);
SetIfGreater(&size.y, pos.y);
// justification where only one of the two directions is set, so we have to iterate
if (f & TEXT_XJUSTIFY)
size.x = xbetween;
if (f & TEXT_YJUSTIFY)
size.y = ybetween;
// return values in the same manner we receive them
if (!(o & ROTATESPRITE_FULL16))
{
size.x >>= 16;
size.y >>= 16;
}
return size;
}
void G_AddCoordsFromRotation(vec2_t *coords, const vec2_t *unitDirection, const int32_t magnitude)
{
coords->x += mulscale14(magnitude, unitDirection->x);
coords->y += mulscale14(magnitude, unitDirection->y);
}
// screentext
vec2_t G_ScreenText(const int32_t font,
int32_t x, int32_t y, const int32_t z, const int32_t blockangle, const int32_t charangle,
const char *str, const int32_t shade, int32_t pal, int32_t o, int32_t alpha,
int32_t xspace, int32_t yline, int32_t xbetween, int32_t ybetween, const int32_t f,
const int32_t x1, const int32_t y1, const int32_t x2, const int32_t y2)
{
vec2_t size = { 0, 0, }; // eventually the return value
vec2_t origin = { 0, 0, }; // where to start, depending on the alignment
vec2_t pos = { 0, 0, }; // holds the coordinate position as we draw each character tile of the string
vec2_t extent = { 0, 0, }; // holds the x-width of each character and the greatest y-height of each line
const vec2_t Xdirection = { sintable[(blockangle+512)&2047], sintable[blockangle&2047], };
const vec2_t Ydirection = { sintable[(blockangle+1024)&2047], sintable[(blockangle+512)&2047], };
const int32_t z2 = (f & TEXT_RRMENUTEXTHACK) ? 26214 : z;
int32_t blendidx=0, tile;
char t;
// set the start and end points depending on direction
int32_t iter = (f & TEXT_BACKWARDS) ? -1 : 1; // iteration direction
const char *end;
const char *text;
if (str == NULL)
return size;
NEG_ALPHA_TO_BLEND(alpha, blendidx, o);
end = (f & TEXT_BACKWARDS) ? str-1 : Bstrchr(str, '\0');
text = (f & TEXT_BACKWARDS) ? Bstrchr(str, '\0')-1 : str;
// for best results, we promote 320x200 coordinates to full precision before any math
if (!(o & ROTATESPRITE_FULL16))
{
x <<= 16;
y <<= 16;
xspace <<= 16;
yline <<= 16;
xbetween <<= 16;
ybetween <<= 16;
}
// coordinate values should be shifted left by 16
// eliminate conflicts, necessary here to get the correct size value
// especially given justification's special handling in G_ScreenTextSize()
if ((f & TEXT_XRIGHT) || (f & TEXT_XCENTER) || (f & TEXT_XJUSTIFY) || (f & TEXT_YJUSTIFY) || blockangle % 512 != 0)
o &= ~TEXT_LINEWRAP;
// size is the return value, and we need it for alignment
size = G_ScreenTextSize(font, x, y, z, blockangle, str, o | ROTATESPRITE_FULL16, xspace, yline, (f & TEXT_XJUSTIFY) ? 0 : xbetween, (f & TEXT_YJUSTIFY) ? 0 : ybetween, f & ~(TEXT_XJUSTIFY|TEXT_YJUSTIFY), x1, y1, x2, y2);
int32_t const xspace_orig = xspace;
int32_t const yline_orig = yline;
int32_t const xbetween_orig = xbetween;
int32_t const ybetween_orig = ybetween;
// handle zooming where applicable
xspace = mulscale16(xspace, z);
yline = mulscale16(yline, z);
xbetween = mulscale16(xbetween, z);
ybetween = mulscale16(ybetween, z);
// size/width/height/spacing/offset values should be multiplied or scaled by $z, zoom (since 100% is 65536, the same as 1<<16)
// alignment
// near-CODEDUP "case '\n':"
{
int32_t lines = G_GetStringNumLines(text, end, iter);
if ((f & TEXT_XJUSTIFY) || (f & TEXT_XRIGHT) || (f & TEXT_XCENTER))
{
const int32_t length = G_GetStringLineLength(text, end, iter);
int32_t linewidth = size.x;
if (lines != 1)
{
char *line = G_GetSubString(text, end, iter, length);
linewidth = G_ScreenTextSize(font, x, y, z, blockangle, line, o | ROTATESPRITE_FULL16, xspace_orig, yline_orig, (f & TEXT_XJUSTIFY) ? 0 : xbetween_orig, (f & TEXT_YJUSTIFY) ? 0 : ybetween_orig, f & ~(TEXT_XJUSTIFY|TEXT_YJUSTIFY|TEXT_BACKWARDS), x1, y1, x2, y2).x;
Xfree(line);
}
if (f & TEXT_XJUSTIFY)
{
size.x = xbetween;
xbetween = (length == 1) ? 0 : tabledivide32_noinline((xbetween - linewidth), (length - 1));
linewidth = size.x;
}
if (f & TEXT_XRIGHT)
origin.x = -(linewidth/z*z);
else if (f & TEXT_XCENTER)
origin.x = -(linewidth/2/z*z);
}
if (f & TEXT_YJUSTIFY)
{
const int32_t tempswap = ybetween;
ybetween = (lines == 1) ? 0 : tabledivide32_noinline(ybetween - size.y, lines - 1);
size.y = tempswap;
}
if (f & TEXT_YBOTTOM)
origin.y = -(size.y/z*z);
else if (f & TEXT_YCENTER)
origin.y = -(size.y/2/z*z);
}
// loop through the string
while (text != end && (t = *text))
{
int32_t orientation = o;
int32_t angle = blockangle + charangle;
// handle escape sequences
if (t == '^' && Bisdigit(*(text+iter)) && !(f & TEXT_LITERALESCAPE))
{
char smallbuf[4];
text += iter;
smallbuf[0] = *text;
text += iter;
if (Bisdigit(*text))
{
smallbuf[1] = *text;
smallbuf[2] = '\0';
text += iter;
}
else
smallbuf[1] = '\0';
if (!(f & TEXT_IGNOREESCAPE))
pal = Batoi(smallbuf);
continue;
}
// handle case bits
if (f & TEXT_UPPERCASE)
{
if (f & TEXT_INVERTCASE) // optimization...?
{ // v^ important that these two ifs remain separate due to the else below
if (Bisupper(t))
t = Btolower(t);
}
else if (Bislower(t))
t = Btoupper(t);
}
else if (f & TEXT_INVERTCASE)
{
if (Bisupper(t))
t = Btolower(t);
else if (Bislower(t))
t = Btoupper(t);
}
// translate the character to a tilenum
tile = gi->GetStringTile(font, &t, f);
switch (t)
{
case '\t':
case ' ':
case '\n':
case '\x7F':
break;
default:
{
vec2_t location = { x, y, };
G_AddCoordsFromRotation(&location, &Xdirection, origin.x);
G_AddCoordsFromRotation(&location, &Ydirection, origin.y);
G_AddCoordsFromRotation(&location, &Xdirection, pos.x);
G_AddCoordsFromRotation(&location, &Ydirection, pos.y);
rotatesprite_(location.x, location.y, z2, angle, tile, shade, pal, orientation, alpha, blendidx, x1, y1, x2, y2);
break;
}
}
// reset this here because we haven't printed anything yet this loop
extent.x = 0;
// handle each character itself in the context of screen drawing
switch (t)
{
case '\t':
case ' ':
// width
extent.x = xspace;
if (f & (TEXT_INTERNALSPACE|TEXT_TILESPACE))
{
char space = '.'; // this is subject to change as an implementation detail
if (f & TEXT_TILESPACE)
space = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &space, f);
extent.x += (tilesiz[tile].x * z);
}
// prepare the height // near-CODEDUP the other two near-CODEDUPs for this section
{
int32_t tempyextent = yline;
if (f & (TEXT_INTERNALLINE|TEXT_TILELINE))
{
char line = 'A'; // this is subject to change as an implementation detail
if (f & TEXT_TILELINE)
line = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &line, f);
tempyextent += tilesiz[tile].y * z;
}
SetIfGreater(&extent.y, tempyextent);
}
if (t == '\t')
extent.x <<= 2; // *= 4
break;
case '\n': // near-CODEDUP "if (wrap)"
extent.x = 0;
// reset the position
pos.x = 0;
// prepare the height
{
int32_t tempyextent = yline;
if (f & (TEXT_INTERNALLINE|TEXT_TILELINE))
{
char line = 'A'; // this is subject to change as an implementation detail
if (f & TEXT_TILELINE)
line = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &line, f);
tempyextent += tilesiz[tile].y * z;
}
SetIfGreater(&extent.y, tempyextent);
}
// move down the line height
if (!(f & TEXT_YOFFSETZERO))
pos.y += extent.y;
// reset the current height
extent.y = 0;
// line spacing
pos.y += ybetween;
// near-CODEDUP "alignments"
if ((f & TEXT_XJUSTIFY) || (f & TEXT_XRIGHT) || (f & TEXT_XCENTER))
{
const int32_t length = G_GetStringLineLength(text+1, end, iter);
char *line = G_GetSubString(text+1, end, iter, length);
int32_t linewidth = G_ScreenTextSize(font, x, y, z, blockangle, line, o | ROTATESPRITE_FULL16, xspace_orig, yline_orig, (f & TEXT_XJUSTIFY) ? 0 : xbetween_orig, (f & TEXT_YJUSTIFY) ? 0 : ybetween_orig, f & ~(TEXT_XJUSTIFY|TEXT_YJUSTIFY|TEXT_BACKWARDS), x1, y1, x2, y2).x;
Xfree(line);
if (f & TEXT_XJUSTIFY)
{
xbetween = (length == 1) ? 0 : tabledivide32_noinline(xbetween - linewidth, length - 1);
linewidth = size.x;
}
if (f & TEXT_XRIGHT)
origin.x = -linewidth;
else if (f & TEXT_XCENTER)
origin.x = -(linewidth / 2);
}
break;
default:
// width
extent.x = tilesiz[tile].x * z;
if (NUMHACKACTIVE)
{
char numeral = '0'; // this is subject to change as an implementation detail
extent.x = (tilesiz[gi->GetStringTile(font, &numeral, f)].x-1) * z;
}
// height
SetIfGreater(&extent.y, (tilesiz[tile].y * z));
break;
}
// incrementing the coordinate counters
{
int32_t xoffset = 0;
// advance the x coordinate
if (!(f & TEXT_XOFFSETZERO) || NUMHACKACTIVE)
xoffset += extent.x;
// account for text spacing
if (!NUMHACKACTIVE
&& t != '\n')
xoffset += xbetween;
// line wrapping
if (f & TEXT_LINEWRAP)
{
int32_t wrap = 0;
const int32_t ang = blockangle % 2048;
// it's safe to make some assumptions and not go through G_AddCoordsFromRotation() since we limit to four directions
switch (ang)
{
case 0:
wrap = (x + (pos.x + xoffset) > ((orientation & 2) ? (320<<16) : ((x2 - USERQUOTE_RIGHTOFFSET)<<16)));
break;
case 512:
wrap = (y + (pos.x + xoffset) > ((orientation & 2) ? (200<<16) : ((y2 - USERQUOTE_RIGHTOFFSET)<<16)));
break;
case 1024:
wrap = (x - (pos.x + xoffset) < ((orientation & 2) ? 0 : ((x1 + USERQUOTE_RIGHTOFFSET)<<16)));
break;
case 1536:
wrap = (y - (pos.x + xoffset) < ((orientation & 2) ? 0 : ((y1 + USERQUOTE_RIGHTOFFSET)<<16)));
break;
}
if (wrap) // near-CODEDUP "case '\n':"
{
// reset the position
pos.x = 0;
// prepare the height
{
int32_t tempyextent = yline;
if (f & (TEXT_INTERNALLINE|TEXT_TILELINE))
{
char line = 'A'; // this is subject to change as an implementation detail
if (f & TEXT_TILELINE)
line = '\x7F'; // tile after '~'
tile = gi->GetStringTile(font, &line, f);
tempyextent += tilesiz[tile].y * z;
}
SetIfGreater(&extent.y, tempyextent);
}
// move down the line height
if (!(f & TEXT_YOFFSETZERO))
pos.y += extent.y;
// reset the current height
extent.y = 0;
// line spacing
pos.y += ybetween;
}
else
pos.x += xoffset;
}
else
pos.x += xoffset;
}
// iterate to the next character in the string
text += iter;
}
// return values in the same manner we receive them
if (!(o & ROTATESPRITE_FULL16))
{
size.x >>= 16;
size.y >>= 16;
}
return size;
}
vec2_t G_ScreenTextShadow(int32_t sx, int32_t sy,
const int32_t font,
int32_t x, int32_t y, const int32_t z, const int32_t blockangle, const int32_t charangle,
const char *str, const int32_t shade, int32_t pal, int32_t o, const int32_t alpha,
int32_t xspace, int32_t yline, int32_t xbetween, int32_t ybetween, const int32_t f,
const int32_t x1, const int32_t y1, const int32_t x2, const int32_t y2)
{
vec2_t size = { 0, 0, }; // eventually the return value
if (!(o & ROTATESPRITE_FULL16))
{
sx <<= 16;
sy <<= 16;
x <<= 16;
y <<= 16;
xspace <<= 16;
yline <<= 16;
xbetween <<= 16;
ybetween <<= 16;
}
G_ScreenText(font, x + mulscale16(sx, z), y + mulscale16(sy, z), z, blockangle, charangle, str, 127, 4, o|ROTATESPRITE_FULL16, alpha, xspace, yline, xbetween, ybetween, f, x1, y1, x2, y2);
size = G_ScreenText(font, x, y, z, blockangle, charangle, str, shade, pal, o|ROTATESPRITE_FULL16, alpha, xspace, yline, xbetween, ybetween, f, x1, y1, x2, y2);
// return values in the same manner we receive them
if (!(o & ROTATESPRITE_FULL16))
{
size.x >>= 16;
size.y >>= 16;
}
return size;
}
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