#include <algorithm></algorithm>

#include <iostream></iostream>

#include <glibmm.h></glibmm.h>

#include "labpangorenderer.h"

#include "surface.h"

#include "log.h"

#include "freetypeview.h"

FreeTypeView::FreeTypeView() {

	params.family = "Ani";

	params.bold = false;

	params.italic = false;

	params.size = 12;

	params.matrix = Matrix().translation(Vector2(15.5, 18.4));

	params.color = Color(1, 1, 0, 1);

	params.text = "Hello World! 123456";

	Glib::signal_timeout().connect(

		sigc::mem_fun(*this, &FreeTypeView::on_timeout),

		20,

		Glib::PRIORITY_DEFAULT_IDLE );

}

FreeTypeView::~FreeTypeView()

	{ }

bool

FreeTypeView::on_timeout() {

	if (!is_visible()) return false;

	params.matrix.m20 += 0.01;

	update_surface();

	return true;

}

void

FreeTypeView::update_surface() {

	this->surface.clear();

	const int width = get_allocated_width();

	const int height = get_allocated_height();

	if (width <= 0 || height <= 0)

		return;

	Matrix matrix = params.matrix;

	Real det2 = matrix.m00*matrix.m11 - matrix.m01*matrix.m10;

	if (det2 <= real_precision_sqr)

		return;

	Real scale = sqrt(det2);

	matrix.row_x() /= scale;

	matrix.row_y() /= scale;

	Real size = params.size*scale;

	// init

	PangoFontMap *font_map = lab_pango_font_map_new(params.hinting);

	PangoContext *context = pango_font_map_create_context(font_map);

	// load font

	PangoFontDescription *font_desc = pango_font_description_new();

	pango_font_description_set_family(font_desc, params.family.c_str());

	pango_font_description_set_weight(font_desc, params.bold ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);

	pango_font_description_set_style(font_desc, params.italic ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL);

	pango_font_description_set_absolute_size(font_desc, size * PANGO_SCALE);

	PangoFont *font = pango_context_load_font(context, font_desc);

	// create layout

	PangoLayout *layout = pango_layout_new(context);

	pango_layout_set_font_description(layout, font_desc);

	pango_layout_set_text(layout, params.text.c_str(), (int)params.text.size());

	// reneder

	DataSurface surface(width, height);

	PangoRenderer *renderer = lab_pango_renderer_new();

	lab_pango_renderer_set_surface((LabPangoRenderer*)renderer, &surface);

	lab_pango_renderer_set_matrix((LabPangoRenderer*)renderer, ¶ms.matrix);

	lab_pango_renderer_set_color((LabPangoRenderer*)renderer, ¶ms.color);

	pango_renderer_draw_layout(renderer, layout, 0, 0);

	// free pango

	g_object_unref(renderer);

	pango_font_description_free(font_desc);

	g_object_unref(layout);

	g_object_unref(font);

	g_object_unref(context);

	g_object_unref(font_map);

	this->surface = surface.to_cairo_surface(true);

	queue_draw();

}

void

FreeTypeView::on_draw_view(const Cairo::RefPtr<cairo::context> &context) {</cairo::context>

	if (surface) {

		context->save();

		context->transform(transform_from_pixels().to_cairo());

		context->set_source(surface, 0, 0);

		context->paint();

		context->restore();

	}

}