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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004 The ScummVM project
*
* The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
// Font management and font drawing module
#include "saga/saga.h"
#include "saga/gfx.h"
#include "saga/rscfile_mod.h"
#include "saga/game_mod.h"
#include "saga/font.h"
namespace Saga {
Font::Font(SagaEngine *vm) : _vm(vm), _initialized(false) {
GAME_FONTDESC *gamefonts;
int i;
// Load font module resource context
if (GAME_GetFileContext(&_fontContext,
GAME_RESOURCEFILE, 0) != SUCCESS) {
error("Font::Font(): Couldn't get resource context.");
}
// Allocate font table
GAME_GetFontInfo(&gamefonts, &_nFonts);
assert(_nFonts > 0);
_fonts = (FONT **)malloc(_nFonts * sizeof *_fonts);
if (_fonts == NULL) {
error("Font::Font(): Memory allocation failure.");
}
for (i = 0; i < _nFonts; i++) {
loadFont(gamefonts[i].font_rn, gamefonts[i].font_id);
}
_initialized = true;
}
Font::~Font(void) {
// int i;
debug(0, "Font::~Font(): Freeing fonts.");
/*
for ( i = 0 ; i < FONT_COUNT ; i ++ ) {
if ( _fonts[i] != NULL ) {
if ( _fonts[i]->normal_loaded ) {
free( _fonts[i]->normal->font_free_p );
free( _fonts[i]->normal );
}
if ( _fonts[i]->outline_loaded ) {
free( _fonts[i]->outline->font_free_p );
free( _fonts[i]->outline );
}
}
free( _fonts[i] );
}
*/
}
int Font::loadFont(uint32 font_rn, int font_id) {
FONT_HEADER fh;
FONT *font;
FONT_STYLE *normal_font;
byte *fontres_p;
size_t fontres_len;
int nbits;
int c;
if ((font_id < 0) || (font_id >= _nFonts)) {
return FAILURE;
}
// Load font resource
if (RSC_LoadResource(_fontContext, font_rn, &fontres_p, &fontres_len) != SUCCESS) {
error("Font::loadFont(): Couldn't load font resource.");
return FAILURE;
}
if (fontres_len < FONT_DESCSIZE) {
error("Font::loadFont(): Invalid font length.");
}
MemoryReadStream readS(fontres_p, fontres_len);
// Create new font structure
font = (FONT *)malloc(sizeof *font);
if (font == NULL) {
error("Font:loadFont(): Memory allocation error.");
return MEM;
}
// Read font header
fh.c_height = readS.readUint16LE();
fh.c_width = readS.readUint16LE();
fh.row_length = readS.readUint16LE();
debug(1, "Font::loadFont(): Reading font resource...");
debug(2, "Character width: %d", fh.c_width);
debug(2, "Character height: %d", fh.c_height);
debug(2, "Row padding: %d", fh.row_length);
// Create normal font style
normal_font = (FONT_STYLE *)malloc(sizeof *normal_font);
if (normal_font == NULL) {
error("Font::loadFont(): Memory allocation error.");
free(font);
return MEM;
}
normal_font->font_free_p = fontres_p;
normal_font->hdr.c_height = fh.c_height;
normal_font->hdr.c_width = fh.c_width;
normal_font->hdr.row_length = fh.row_length;
for (c = 0; c < FONT_CHARCOUNT; c++) {
normal_font->fce[c].index = readS.readUint16LE();
}
for (c = 0; c < FONT_CHARCOUNT; c++) {
nbits = normal_font->fce[c].width = readS.readByte();
normal_font->fce[c].byte_width = getByteLen(nbits);
}
for (c = 0; c < FONT_CHARCOUNT; c++) {
normal_font->fce[c].flag = readS.readByte();
}
for (c = 0; c < FONT_CHARCOUNT; c++) {
normal_font->fce[c].tracking = readS.readByte();
}
if (readS.pos() != FONT_DESCSIZE) {
warning("Invalid font resource size.");
return FAILURE;
}
normal_font->font_p = fontres_p + FONT_DESCSIZE;
font->normal = normal_font;
font->normal_loaded = 1;
// Create outline font style
font->outline = createOutline(normal_font);
font->outline_loaded = 1;
// Set font data
_fonts[font_id] = font;
return SUCCESS;
}
int Font::getHeight(int font_id) {
FONT *font;
if (!_initialized) {
return FAILURE;
}
if ((font_id < 0) || (font_id >= _nFonts) || (_fonts[font_id] == NULL)) {
error("Font::getHeight(): Invalid font id.");
return FAILURE;
}
font = _fonts[font_id];
return font->normal->hdr.c_height;
}
FONT_STYLE *Font::createOutline(FONT_STYLE *src_font) {
FONT_STYLE *new_font;
unsigned char *new_font_data;
size_t new_font_data_len;
int s_width = src_font->hdr.c_width;
int s_height = src_font->hdr.c_height;
int new_row_len = 0;
int row;
int i;
int index;
size_t index_offset = 0;
int new_byte_width;
int old_byte_width;
int current_byte;
unsigned char *base_ptr;
unsigned char *src_ptr;
unsigned char *dest_ptr1;
unsigned char *dest_ptr2;
unsigned char *dest_ptr3;
unsigned char c_rep;
// Create new font style structure
new_font = (FONT_STYLE *)malloc(sizeof *new_font);
if (new_font == NULL) {
error("Font::createOutline(): Memory allocation error.");
return NULL;
}
memset(new_font, 0, sizeof *new_font);
// Populate new font style character data
for (i = 0; i < FONT_CHARCOUNT; i++) {
new_byte_width = 0;
old_byte_width = 0;
index = src_font->fce[i].index;
if ((index > 0) || (i == FONT_FIRSTCHAR)) {
index += index_offset;
}
new_font->fce[i].index = index;
new_font->fce[i].tracking = src_font->fce[i].tracking;
new_font->fce[i].flag = src_font->fce[i].flag;
if (src_font->fce[i].width != 0) {
new_byte_width = getByteLen(src_font->fce[i].width + 2);
old_byte_width = getByteLen(src_font->fce[i].width);
if (new_byte_width > old_byte_width) {
index_offset++;
}
}
new_font->fce[i].width = src_font->fce[i].width + 2;
new_font->fce[i].byte_width = new_byte_width;
new_row_len += new_byte_width;
}
debug(2, "New row length: %d", new_row_len);
new_font->hdr.c_width = s_width + 2;
new_font->hdr.c_height = s_height + 2;
new_font->hdr.row_length = new_row_len;
// Allocate new font representation storage
new_font_data_len = new_row_len * (s_height + 2);
new_font_data = (unsigned char *)malloc(new_font_data_len);
if (new_font_data == NULL) {
error("Font::createOutline(): Memory allocation error.");
return NULL;
}
memset(new_font_data, 0, new_font_data_len);
new_font->font_free_p = new_font_data;
new_font->font_p = new_font_data;
// Generate outline font representation
for (i = 0; i < FONT_CHARCOUNT; i++) {
for (row = 0; row < s_height; row++) {
for (current_byte = 0; current_byte < new_font->fce[i].byte_width; current_byte++) {
base_ptr = new_font->font_p + new_font->fce[i].index + current_byte;
dest_ptr1 = base_ptr + new_font->hdr.row_length * row;
dest_ptr2 = base_ptr + new_font->hdr.row_length * (row + 1);
dest_ptr3 = base_ptr + new_font->hdr.row_length * (row + 2);
if (current_byte > 0) {
// Get last two columns from previous byte
src_ptr = src_font->font_p + src_font->hdr.row_length * row + src_font->fce[i].index +
(current_byte - 1);
c_rep = *src_ptr;
*dest_ptr1 |= ((c_rep << 6) | (c_rep << 7));
*dest_ptr2 |= ((c_rep << 6) | (c_rep << 7));
*dest_ptr3 |= ((c_rep << 6) | (c_rep << 7));
}
if (current_byte < src_font->fce[i].byte_width) {
src_ptr = src_font->font_p + src_font->hdr.row_length * row + src_font->fce[i].index +
current_byte;
c_rep = *src_ptr;
*dest_ptr1 |= c_rep | (c_rep >> 1) | (c_rep >> 2);
*dest_ptr2 |= c_rep | (c_rep >> 1) | (c_rep >> 2);
*dest_ptr3 |= c_rep | (c_rep >> 1) | (c_rep >> 2);
}
}
}
// "Hollow out" character to prevent overdraw
for (row = 0; row < s_height; row++) {
for (current_byte = 0; current_byte < new_font->fce[i].byte_width; current_byte++) {
dest_ptr2 = new_font->font_p + new_font->hdr.row_length * (row + 1) + new_font->fce[i].index + current_byte;
if (current_byte > 0) {
// Get last two columns from previous byte
src_ptr = src_font->font_p + src_font->hdr.row_length * row + src_font->fce[i].index +
(current_byte - 1);
*dest_ptr2 &= ((*src_ptr << 7) ^ 0xFFU);
}
if (current_byte < src_font->fce[i].byte_width) {
src_ptr = src_font->font_p + src_font->hdr.row_length * row + src_font->fce[i].index +
current_byte;
*dest_ptr2 &= ((*src_ptr >> 1) ^ 0xFFU);
}
}
}
}
return new_font;
}
int Font::getByteLen(int num_bits) {
int byte_len;
byte_len = num_bits / 8;
if (num_bits % 8) {
byte_len++;
}
return byte_len;
}
// Returns the horizontal length in pixels of the graphical representation
// of at most 'test_str_ct' characters of the string 'test_str', taking
// into account any formatting options specified by 'flags'.
// If 'test_str_ct' is 0, all characters of 'test_str' are counted.
int Font::getStringWidth(int font_id, const char *test_str, size_t test_str_ct, int flags) {
FONT *font;
size_t ct;
int width = 0;
int ch;
const byte *txt_p;
if (!_initialized) {
return FAILURE;
}
if ((font_id < 0) || (font_id >= _nFonts) || (_fonts[font_id] == NULL)) {
error("Font::getStringWidth(): Invalid font id.");
return FAILURE;
}
font = _fonts[font_id];
assert(font != NULL);
txt_p = (const byte *) test_str;
for (ct = test_str_ct; *txt_p && (!test_str_ct || ct > 0); txt_p++, ct--) {
ch = *txt_p & 0xFFU;
// Translate character
ch = _charMap[ch];
assert(ch < FONT_CHARCOUNT);
width += font->normal->fce[ch].tracking;
}
if ((flags & FONT_BOLD) || (flags & FONT_OUTLINE)) {
width += 1;
}
return width;
}
int Font::draw(int font_id, SURFACE *ds, const char *draw_str, size_t draw_str_ct,
int text_x, int text_y, int color, int effect_color, int flags) {
FONT *font;
if (!_initialized) {
error("Font::draw(): Font Module not initialized.");
return FAILURE;
}
if ((font_id < 0) || (font_id >= _nFonts) || (_fonts[font_id] == NULL)) {
error("Font::draw(): Invalid font id.");
return FAILURE;
}
font = _fonts[font_id];
if (flags & FONT_OUTLINE) {
outFont(font->outline, ds, draw_str, draw_str_ct, text_x - 1, text_y - 1, effect_color);
outFont(font->normal, ds, draw_str, draw_str_ct, text_x, text_y, color);
} else if (flags & FONT_SHADOW) {
outFont(font->normal, ds, draw_str, draw_str_ct, text_x - 1, text_y + 1, effect_color);
outFont(font->normal, ds, draw_str, draw_str_ct, text_x, text_y, color);
} else { // FONT_NORMAL
outFont(font->normal, ds, draw_str, draw_str_ct, text_x, text_y, color);
}
return SUCCESS;
}
int Font::outFont(FONT_STYLE * draw_font, SURFACE * ds, const char *draw_str, size_t draw_str_ct,
int text_x, int text_y, int color) {
const byte *draw_str_p;
byte *c_data_ptr;
int c_code;
int char_row;
byte *output_ptr;
byte *output_ptr_min;
byte *output_ptr_max;
int row;
int row_limit;
int c_byte_len;
int c_byte;
int c_bit;
int ct;
if ((text_x > ds->w) || (text_y > ds->h)) {
// Output string can't be visible
return SUCCESS;
}
draw_str_p = (const byte *) draw_str;
ct = draw_str_ct;
// Draw string one character at a time, maximum of 'draw_str'_ct
// characters, or no limit if 'draw_str_ct' is 0
for (; *draw_str_p && (!draw_str_ct || ct); draw_str_p++, ct--) {
c_code = *draw_str_p & 0xFFU;
// Translate character
c_code = _charMap[c_code];
assert(c_code < FONT_CHARCOUNT);
// Check if character is defined
if ((draw_font->fce[c_code].index == 0) && (c_code != FONT_FIRSTCHAR)) {
#if FONT_SHOWUNDEFINED
if (c_code == FONT_CH_SPACE) {
text_x += draw_font->fce[c_code].tracking;
continue;
}
c_code = FONT_CH_QMARK;
#else
// Character code is not defined, but advance tracking
// ( Not defined if offset is 0, except for 33 ('!') which
// is defined )
text_x += draw_font->fce[c_code].tracking;
continue;
#endif
}
// Get length of character in bytes
c_byte_len = ((draw_font->fce[c_code].width - 1) / 8) + 1;
row_limit = (ds->h < (text_y + draw_font->hdr.c_height)) ? ds->h : text_y + draw_font->hdr.c_height;
char_row = 0;
for (row = text_y; row < row_limit; row++, char_row++) {
// Clip negative rows */
if (row < 0) {
continue;
}
output_ptr = (byte *)ds->pixels + (ds->pitch * row) + text_x;
output_ptr_min = (byte *)ds->pixels + (ds->pitch * row) + (text_x > 0 ? text_x : 0);
output_ptr_max = output_ptr + (ds->pitch - text_x);
// If character starts off the screen, jump to next character
if (output_ptr < output_ptr_min) {
break;
}
c_data_ptr = draw_font->font_p + char_row * draw_font->hdr.row_length + draw_font->fce[c_code].index;
for (c_byte = 0; c_byte < c_byte_len; c_byte++, c_data_ptr++) {
// Check each bit, draw pixel if bit is set
for (c_bit = 7; c_bit >= 0 && (output_ptr < output_ptr_max); c_bit--) {
if ((*c_data_ptr >> c_bit) & 0x01) {
*output_ptr = (byte) color;
}
output_ptr++;
} // end per-bit processing
} // end per-byte processing
} // end per-row processing
// Advance tracking position
text_x += draw_font->fce[c_code].tracking;
} // end per-character processing
return SUCCESS;
}
} // End of namespace Saga
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