1 files changed, 172 insertions, 0 deletions
diff --git a/mainwindow.cpp b/mainwindow.cpp
new file mode 100644
index 0000000..ea3a91f
--- /dev/null
+++ b/mainwindow.cpp
@@ -0,0 +1,172 @@
+#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);
+
+	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, 24);
+	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[1024 * 256 * 4];
+	memset(data__, 0, 1024 * 256 * 4);
+	int	col	= 1024 - 1;
+	int	line	= 100;
+	QImage	img(data__, 1024, 256, 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 || ch == 0xC )
+			continue;
+
+		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);//slot->bitmap.width;
+
+		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 < 1024 && 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);
+	}
+
+
+	for( int i = 0; i < 1024; ++i )
+		//data__[i + 128 * 512 * 4 + 1]	= 0xFF;
+		img.setPixel(i, 128, 0xFF000000);
+	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 )
+{
+}