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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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.
*
*/
/*
* This code is based on Labyrinth of Time code with assistance of
*
* Copyright (c) 1993 Terra Nova Development
* Copyright (c) 2004 The Wyrmkeep Entertainment Co.
*
*/
#include "lab/stddefines.h"
#include "lab/labfun.h"
#include "lab/text.h"
#include "lab/vga.h"
namespace Lab {
/*****************************************************************************/
/* Opens up a font from disk, but uses buffer memory to store it in. */
/*****************************************************************************/
bool openFontMem(const char *TextFontPath, struct TextFont *tf, byte *fontbuffer) {
byte **file = NULL;
char header[5];
uint32 filesize, headersize = 4L + 2L + 256 * 3 + 4L;
file = g_music->newOpen(TextFontPath, filesize);
if ((file != NULL) && (filesize > headersize)) {
header[4] = 0;
readBlock(&header, 4L, file);
if (strcmp(header, "VGAF") == 0) {
tf->DataLength = filesize - headersize;
readBlock(&(tf->Height), 2L, file);
swapUShortPtr(&(tf->Height), 1);
readBlock(tf->Widths, 256L, file);
readBlock(tf->Offsets, 256L * 2L, file);
swapUShortPtr(tf->Offsets, 256);
skip(file, 4L);
tf->data = fontbuffer;
readBlock(tf->data, tf->DataLength, file);
return true;
}
}
return false;
}
/*****************************************************************************/
/* Opens up a font from disk. */
/*****************************************************************************/
bool openFont(const char *TextFontPath, struct TextFont **tf) {
byte **file = NULL;
char header[5];
uint32 filesize, headersize = 4L + 2L + 256 * 3 + 4L;
if ((*tf = (TextFont *)calloc(sizeof(struct TextFont), 1))) {
file = g_music->newOpen(TextFontPath, filesize);
if ((file != NULL) && (filesize > headersize)) {
header[4] = 0;
readBlock(&header, 4L, file);
if (strcmp(header, "VGAF") == 0) {
(*tf)->DataLength = filesize - headersize;
readBlock(&((*tf)->Height), 2L, file);
swapUShortPtr(&((*tf)->Height), 1);
readBlock((*tf)->Widths, 256L, file);
readBlock((*tf)->Offsets, 256L * 2L, file);
swapUShortPtr((*tf)->Offsets, 256);
skip(file, 4L);
if (((*tf)->data = (byte *)calloc((*tf)->DataLength, 1))) {
readBlock((*tf)->data, (*tf)->DataLength, file);
return true;
}
}
}
free(*tf);
}
*tf = NULL;
return false;
}
/*****************************************************************************/
/* Closes a font and frees all memory associated with it. */
/*****************************************************************************/
void closeFont(struct TextFont *tf) {
if (tf) {
if (tf->data && tf->DataLength)
free(tf->data);
free(tf);
}
}
/*****************************************************************************/
/* Returns the length of a text in the specified font. */
/*****************************************************************************/
uint16 textLength(struct TextFont *tf, const char *text, uint16 numchars) {
uint16 counter, length = 0;
if (tf)
for (counter = 0; counter < numchars; counter++) {
length += tf->Widths[(uint)*text];
text++;
}
return length;
}
/*****************************************************************************/
/* Returns the height of a specified font. */
/*****************************************************************************/
uint16 textHeight(struct TextFont *tf) {
if (tf)
return tf->Height;
else
return 0;
}
extern uint32 VGAScreenWidth, VGABytesPerPage;
/*****************************************************************************/
/* Draws the text to the screen. */
/*****************************************************************************/
void text(struct TextFont *tf, uint16 x, uint16 y, uint16 color, const char *text, uint16 numchars) {
byte *VGATop, *VGACur, *VGATemp, *VGATempLine, *cdata;
uint32 RealOffset, SegmentOffset;
int32 templeft, LeftInSegment;
uint16 counter, counterb, bwidth, mask, curpage, rows, cols, data;
VGATop = getVGABaseAddr();
for (counter = 0; counter < numchars; counter++) {
RealOffset = (VGAScreenWidth * y) + x;
curpage = RealOffset / VGABytesPerPage;
SegmentOffset = RealOffset - (curpage * VGABytesPerPage);
LeftInSegment = VGABytesPerPage - SegmentOffset;
VGACur = VGATop + SegmentOffset;
setPage(curpage);
if (tf->Widths[(uint)*text]) {
cdata = tf->data + tf->Offsets[(uint)*text];
bwidth = *cdata;
cdata++;
VGATemp = VGACur;
VGATempLine = VGACur;
for (rows = 0; rows < tf->Height; rows++) {
VGATemp = VGATempLine;
templeft = LeftInSegment;
for (cols = 0; cols < bwidth; cols++) {
data = *cdata;
cdata++;
if (data && (templeft >= 8)) {
if (0x80 & data)
*VGATemp = color;
VGATemp++;
if (0x40 & data)
*VGATemp = color;
VGATemp++;
if (0x20 & data)
*VGATemp = color;
VGATemp++;
if (0x10 & data)
*VGATemp = color;
VGATemp++;
if (0x08 & data)
*VGATemp = color;
VGATemp++;
if (0x04 & data)
*VGATemp = color;
VGATemp++;
if (0x02 & data)
*VGATemp = color;
VGATemp++;
if (0x01 & data)
*VGATemp = color;
VGATemp++;
templeft -= 8;
} else if (data) {
mask = 0x80;
templeft = LeftInSegment;
for (counterb = 0; counterb < 8; counterb++) {
if (templeft <= 0) {
curpage++;
setPage(curpage);
VGATemp = (byte *)(VGATop - templeft);
/* Set up VGATempLine for next line */
VGATempLine -= VGABytesPerPage;
/* Set up LeftInSegment for next line */
LeftInSegment += VGABytesPerPage + templeft;
templeft += VGABytesPerPage;
}
if (mask & data)
*VGATemp = color;
VGATemp++;
mask = mask >> 1;
templeft--;
}
} else {
templeft -= 8;
VGATemp += 8;
}
}
VGATempLine += VGAScreenWidth;
LeftInSegment -= VGAScreenWidth;
if (LeftInSegment <= 0) {
curpage++;
setPage(curpage);
VGATempLine -= VGABytesPerPage;
LeftInSegment += VGABytesPerPage;
}
}
}
x += tf->Widths[(int)*text];
text++;
}
ungetVGABaseAddr();
}
} // End of namespace Lab
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