#include <gtk/gtk.h>
#include <fpu_control.h>

/*
 gcc -o t pango123425.c `pkg-config --cflags --libs gtk+-2.0`
*/

gboolean  expose (GtkWidget *widget, GdkEventExpose *event, gpointer user_data) {
	GdkGC* gc = gdk_gc_new (event->window);
	PangoLayout* layout = pango_layout_new (gtk_widget_get_pango_context (widget));	
	GtkStyle* style = gtk_widget_get_style (widget);
	GdkRegion* rgn;
	GdkColor bg = style->base[GTK_STATE_SELECTED];
	GdkColor fg = style->text[GTK_STATE_SELECTED];
	int indices[2] = {1, 6};
	int width;
	int padding = 10;
	int layoutWidth, layoutHeight;	
	const char* string = "Felips";
	GdkRectangle gdkRect;
	
	PangoFontDescription* font = pango_font_description_new();
	pango_font_description_set_family(font, "Tahoma");
	pango_font_description_set_size(font, 16 * PANGO_SCALE);
	
	pango_layout_set_text(layout, string, -1);
	pango_layout_set_font_description(layout, font);
	gdk_draw_layout(event->window, gc, padding, padding, layout);
	
	pango_layout_get_size(layout, &layoutWidth, &layoutHeight);
	printf("%i %i\n", layoutWidth, layoutHeight);
	layoutWidth = PANGO_PIXELS(layoutWidth);
	layoutHeight = PANGO_PIXELS(layoutHeight);
	printf("%i %i\n", layoutWidth, layoutHeight);
	width = widget->allocation.width - padding * 2 - layoutWidth;
	gdk_gc_set_foreground(gc, &bg);
	gdk_draw_rectangle(event->window, gc, 1, padding + layoutWidth, padding, width, layoutHeight);
	
	rgn = gdk_pango_layout_get_clip_region (layout, padding, padding, indices, 1);
	gdk_gc_set_clip_region(gc, rgn);
	gdk_region_get_clipbox(rgn, &gdkRect);
	printf("clip: %i %i %i %i\n", gdkRect.x, gdkRect.y, gdkRect.width, gdkRect.height);
	gdk_region_destroy(rgn);
	gdk_draw_layout_with_colors(event->window, gc, padding, padding, layout, &fg, &bg);
	g_object_unref(layout);
	pango_font_description_free(font);
	gdk_gc_unref (gc);
	printf ("GTK version %i.%i.%i\n", gtk_major_version, gtk_minor_version, gtk_micro_version);
	return 0;
}

int main (int argc, char** argv) {
	GtkWidget *shell, *drawingArea;
	fpu_control_t fpu_control;
	
	/* Feature: Cairo and Java don't get along.
	 * 
	 * For some reason the java vm sets the FPU to double mode,
	 * When running in double mode cairo (used by pango 1.10.2) 
	 * loses precision and trunc value down.
	 * remove the following 4 lines of code and it all works fine.
	 */
    _FPU_GETCW (fpu_control);
    fpu_control &= ~_FPU_EXTENDED;
    fpu_control |= _FPU_DOUBLE;
    _FPU_SETCW (fpu_control);
	
	gtk_init_check (&argc, &argv);
    
	shell = gtk_window_new (GTK_WINDOW_TOPLEVEL);
	drawingArea = gtk_fixed_new ();	
	gtk_fixed_set_has_window (GTK_FIXED(drawingArea), 1);
	gtk_container_add (GTK_CONTAINER (shell), drawingArea);	
	
	g_signal_connect (G_OBJECT (drawingArea), "expose-event", G_CALLBACK (expose), NULL);	
	g_signal_connect (G_OBJECT (shell), "destroy", G_CALLBACK (gtk_main_quit), NULL);
	g_signal_connect (G_OBJECT (shell), "delete_event",G_CALLBACK (gtk_main_quit), NULL);
	gtk_window_set_default_size (GTK_WINDOW (shell), 280, 240);
	gtk_widget_show_all (shell);
	gtk_main();

}