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/*
** Arabtype Copyright 2012-2015(c) Wael El Oraiby. All Rights Reserved
**
** This file is in public domain
*/
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtGui>
#include <cassert>
#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include "utf8.h"
#include "arabtype.h"
FT_Library MainWindow::ftlib__ = NULL;
uint32_t get_arabic_form(const std::vector<uint32_t>& code_point, uint32_t idx)
{
uint ch = code_point[idx];
uint prev = 0;
uint next = 0;
if( idx )
prev = code_point[idx - 1];
if( idx < code_point.size() - 1 )
next = code_point[idx + 1];
return get_presentation_form_b(prev, next, ch);
}
std::vector<uint32_t> decode(const std::vector<uint8_t>& in)
{
std::vector<uint> ret;
uint codep = 0;
uint state = 0;
for( size_t i = 0; i < in.size(); ++i )
{
if( decode(&state, &codep, in[i]) == UTF8_ACCEPT )
ret.push_back(codep);
}
if( state != UTF8_ACCEPT )
std::cout << "The string is not well-formed" << std::endl;
return ret;
}
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui__(new Ui::MainWindow)
{
ui__->setupUi(this);
int width = 480;
int height = 320;
int font_size = 24;
std::ifstream ifs("arabic_test.txt");
assert( ifs.is_open() );
std::vector<uchar> arabic_string;
while( ifs.good() )
{
uchar ch = ifs.get();
if( ifs.good() )
arabic_string.push_back(ch);
}
std::cout << "size: " << arabic_string.size() << std::endl;
ifs.close();
std::vector<uint> arabic_cp = decode(arabic_string);
for( size_t i = 0; i < arabic_cp.size(); ++i )
std::cout << "0x" << std::hex << arabic_cp[i] << std::endl;
std::cout << std::dec;
if( !ftlib__ )
{
FT_Error error = FT_Init_FreeType(&ftlib__);
assert( !error && "Error loading freetype" );
}
// load the font
FT_Face face;
FT_Error error;
error = FT_New_Face(ftlib__, "ae_Tholoth.ttf", 0, &face);
assert( !error && "unable to load font file" );
// set font size
error = FT_Set_Pixel_Sizes(face, 0, font_size);
assert( !error && "Error setting font size" );
// setup glyph
// render chars
FT_GlyphSlot slot = face->glyph;
FT_Int32 load_flags = FT_LOAD_DEFAULT | FT_LOAD_FORCE_AUTOHINT;
FT_Render_Mode render_flags = FT_RENDER_MODE_NORMAL;
data__ = new uchar[width * height * 4];
memset(data__, 0, width * height * 4);
int col = width - font_size;
int line = font_size;
QImage img(data__, width, height, QImage::Format_RGB32);
// render the arabic glyphs
for( size_t idx = 0; idx < arabic_cp.size(); ++idx )
{
uint ch = get_arabic_form(arabic_cp, idx);
if( ch == 0xA ) {
line += font_size;
col = width - font_size;
continue;
}
if ( ch == 0xC ) {
continue;
}
if ( ch == -1 ) {
continue;
}
assert(ch != 0);
int glyph_index = FT_Get_Char_Index(face, ch);
assert( glyph_index && "invalid character" );
error = FT_Load_Glyph(face, glyph_index, load_flags);
assert( !error && "couldn't load glyph" );
error = FT_Render_Glyph(slot, render_flags);
assert( !error && "couldn't render glyph" );
FT_Glyph glyph;
FT_Get_Glyph(slot, &glyph);
FT_BBox box;
FT_Glyph_Get_CBox(glyph, FT_GLYPH_BBOX_TRUNCATE, &box);
int temp_col = col - (slot->advance.x >> 6);
for( int y = 0; y < slot->bitmap.rows; y++ )
{
for( int x = 0; x < slot->bitmap.width; x++ )
{
uchar co = slot->bitmap.buffer[x + y * slot->bitmap.pitch];
if( co && x + temp_col < width && x + temp_col >= 0 )
{
uint rgb = img.pixel(x + temp_col + slot->bitmap_left, y - slot->bitmap_top + line);
img.setPixel(x + temp_col + slot->bitmap_left, y - slot->bitmap_top + line, rgb | qRgb(co, co, co));
}
//std::cout << uint(co) << " ";
}
//std::cout << std::endl;
}
//std::cout << std::endl;
col -= slot->advance.x >> 6;
FT_Done_Glyph(glyph);
}
QPixmap pixmap = QPixmap::fromImage(img);
ui__->label->setPixmap(pixmap);
FT_Done_Face(face);
}
MainWindow::~MainWindow()
{
FT_Done_FreeType(ftlib__);
delete ui__;
delete data__;
}
void MainWindow::paintEvent ( QPaintEvent * event )
{
}
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