code_twain/sane/DlgGamma.cpp

// DlgIndicator.cpp: 实现文件
//

#include "DlgGamma.h"
#include "resource.h"
#include "mem_dc.h"


#define MAX_KEY_POINTS	4	// not include (0, 0) and (255, 255)

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// calculator
#include <math.h>
namespace calc
{
	void solve_matrix(double** a, int n, std::vector<double>& coef)
	{
		int m = 0;
		int i, j;

		coef.clear();
		for (j = 0; j < n; j++) {
			double max = 0;
			double imax = 0;
			for (i = j; i < n; i++) {
				if (imax < fabs(a[i][j])) {
					imax = fabs(a[i][j]);
					max = a[i][j];//得到各行中所在列最大元素
					m = i;
				}
			}
			if (fabs(a[j][j]) != max) {
				double b = 0;
				for (int k = j; k < n + 1; k++) {
					b = a[j][k];
					a[j][k] = a[m][k];
					a[m][k] = b;
				}
			}
			for (int r = j; r < n + 1; r++) {
				a[j][r] = a[j][r] / max;//让该行的所在列除以所在列的第一个元素，目的是让首元素为1
			}
			for (i = j + 1; i < n; i++) {
				double c = a[i][j];
				if (c == 0)  continue;
				for (int s = j; s < n + 1; s++) {
					//double tempdata = a[i][s];
					a[i][s] = a[i][s] - a[j][s] * c;//前后行数相减，使下一行或者上一行的首元素为0
				}
			}
		}
		for (i = n - 2; i >= 0; i--) {
			for (j = i + 1; j < n; j++) {
				a[i][n] = a[i][n] - a[j][n] * a[i][j];
			}
		}

		for (int k = 0; k < n; k++) {
			coef.push_back(a[k][n]);
		}
	}
	int power(int m, int exp)
	{
		int val = 1;
		for (int i = 0; i < exp; ++i)
			val *= m;

		return val;
	}
	std::vector<double> coefs_from_points(const std::vector<POINT>& pt)
	{
		std::vector<double>	coef;
		double** a = new double* [pt.size()];

		for (int i = 0; i < (int)pt.size(); ++i)
			a[i] = new double[pt.size() + 1];

		for (int i = 0; i < (int)pt.size(); ++i)
		{
			for (int j = 0; j < (int)pt.size(); ++j)
				a[i][j] = power(pt[i].x, pt.size() - j - 1);
			a[i][pt.size()] = pt[i].y;
		}
		solve_matrix(a, pt.size(), coef);
		for (int i = 0; i < (int)pt.size(); ++i)
			delete[] a[i];
		delete[] a;

		return coef;
	}
}



///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// dlg_gamma
dlg_gamma::dlg_gamma(HWND parent, bool color) : dlg_base(parent, IDD_GAMMA), exit_code_(0), is_color_(color), bkgnd_(NULL)
											, show_all_(false)
{
	std::wstring	title(dlg_base::language_from_hz936(L"\u81EA\u5B9A\u4E49\u8272\u8C03\u66F2\u7EBF"));

	create();
	SetWindowTextW(hwnd(), title.c_str());

	if (!dlg_base::is_language_pack_default_code_page())
	{
		title = dlg_base::language_from_hz936(L"\u8272\u8C03\u65B9\u6848");
		set_item_text(IDC_STATIC_SCHEME, title.c_str());

		title = dlg_base::language_from_hz936(L"\u989C\u8272\u901A\u9053");
		set_item_text(IDC_STATIC_COLOR, title.c_str());

		title = dlg_base::language_from_hz936(L"\u521D\u59CB\u5316");
		set_item_text(IDC_BUTTON_RESET, title.c_str());

		title = dlg_base::language_from_hz936(L"\u8F93\u5165");
		set_item_text(IDC_STATIC_INPUT, title.c_str());

		title = dlg_base::language_from_hz936(L"\u8F93\u51FA");
		set_item_text(IDC_STATIC_OUTPUT, title.c_str());

		title = dlg_base::language_from_hz936(L"\u53D6\u6D88");
		set_item_text(IDCANCEL, title.c_str());

		title = dlg_base::language_from_hz936(L"\u786E\u5B9A");
		set_item_text(IDOK, title.c_str());

		layout();
	}
}
dlg_gamma::~dlg_gamma()
{
	DeleteObject(bkgnd_);
}


BOOL dlg_gamma::handle_message(UINT msg, WPARAM wp, LPARAM lp)
{
	wchar_t	text[40] = { 0 };
	BOOL	ret = TRUE;

	switch (msg)
	{
	case WM_INITDIALOG:
		on_init_dlg();
		UpdateWindow(hwnd());
		break;
	case WM_COMMAND:
		handle_command(HIWORD(wp), LOWORD(wp), (HWND)lp);
		break;
	case WM_PAINT:
	{
		PAINTSTRUCT ps = { 0 };
		HDC	hdc = BeginPaint(hwnd(), &ps);
		{
			compatible_dc	dc(hdc);
			on_paint(dc.get_dc());
		}
		EndPaint(hwnd(), &ps);
	}
		break;
	case WM_MOUSEMOVE:
		on_mouse_move(wp, LOWORD(lp), HIWORD(lp));
		break;
	case WM_LBUTTONDOWN:
		on_lbutton_down(LOWORD(lp), HIWORD(lp));
		break;
	case WM_LBUTTONUP:
		on_lbutton_up(LOWORD(lp), HIWORD(lp));
		break;
	default:
		ret = FALSE;
	}
	return ret;
}
void dlg_gamma::handle_command(WORD code, WORD id, HANDLE ctrl)
{
	if (code == BN_CLICKED)
	{
		if (id == IDC_BUTTON_RESET)
		{
			init_curve(cur_, cur_->clr);
			InvalidateRect(hwnd(), NULL, FALSE);
		}
		else
		{
			exit_code_ = id;
		}
	}
	else if (code == EN_CHANGE)
	{
		if (id == IDC_EDIT_INPUT)
		{
			wchar_t	val[40] = { 0 };
			int		y = 0;

			GetDlgItemTextW(hwnd(), id, val, _countof(val) - 1);
			y = _wtoi(val);
			if (y < cur_->points[0].x)
				SetDlgItemInt(hwnd(), IDC_EDIT_INPUT, cur_->points[0].x, FALSE);
			if (y > cur_->points[1].x)
				SetDlgItemInt(hwnd(), IDC_EDIT_INPUT, cur_->points[1].x, FALSE);
			else
			{
				y = calc_value(y);
				SetDlgItemInt(hwnd(), IDC_EDIT_OUTPUT, y, FALSE);
			}
		}
	}
	else if (code == CBN_SELCHANGE)
	{
		on_combo_sel_changed(id, SendMessage((HWND)ctrl, CB_GETCURSEL, 0, 0));
	}
}
void dlg_gamma::layout(void)
{
	int r1 = get_width_diff_as_text_length(IDC_STATIC_SCHEME),
		r21 = get_width_diff_as_text_length(IDC_STATIC_COLOR),
		r22 = get_width_diff_as_text_length(IDC_BUTTON_RESET),
		r31 = get_width_diff_as_text_length(IDC_STATIC_INPUT),
		r32 = get_width_diff_as_text_length(IDC_STATIC_OUTPUT),
		r33 = get_width_diff_as_text_length(IDCANCEL),
		r34 = get_width_diff_as_text_length(IDOK),
		diff = 0;

	if (diff < r1)
		diff = r1;
	if (diff < r21 + r22)
		diff = r21 + r22;
	if (diff < r31 + r32 + r33 + r34)
		diff = r31 + r32 + r33 + r34;

	if (diff > 0)
	{
		RECT	r = { 0 };

		GetWindowRect(hwnd(), &r);
		r.right += diff;
		MoveWindow(hwnd(), r.left, r.top, RECT_W(r), RECT_H(r), FALSE);

		expand_item(IDC_STATIC_SCHEME, r1, 0);
		offset_item(IDC_SCHEME, r1, 0);
		expand_item(IDC_SCHEME, diff - r1, 0);

		expand_item(IDC_STATIC_COLOR, r21, 0);
		offset_item(IDC_CHANNEL, r21, 0);

		expand_item(IDC_BUTTON_RESET, r22, 0);
		offset_item(IDC_BUTTON_RESET, diff - r22, 0);

		expand_item(IDC_STATIC_INPUT, r31, 0);
		offset_item(IDC_EDIT_INPUT, r31, 0);

		offset_item(IDC_STATIC_OUTPUT, r31, 0);
		expand_item(IDC_STATIC_OUTPUT, r32, 0);
		offset_item(IDC_EDIT_OUTPUT, r31 + r32, 0);

		offset_item(IDCANCEL, diff - r33, 0);
		expand_item(IDCANCEL, r33, 0);

		offset_item(IDOK, diff - r34, 0);
		expand_item(IDOK, r34, 0);

		expand_item(IDC_STATIC_PAINT, diff, 0);
	}
}
void dlg_gamma::create_background(void)
{
	COLORREF	bclr = RGB(128, 128, 128);
	HDC		hdc = GetWindowDC(hwnd()),
			cdc = CreateCompatibleDC(hdc);
	HBRUSH	bkg = CreateSolidBrush(bclr);
	HPEN	grid = CreatePen(PS_SOLID, 1, RGB(0, 0, 0)),
			old = (HPEN)SelectObject(cdc, grid);
	HBITMAP	ob = NULL;
	int		w = paint_area_.right - paint_area_.left + 2,
			h = paint_area_.bottom - paint_area_.top + 2;
	RECT	r = { 1, 1, w - 1, h - 1};

	if (bkgnd_)
		DeleteObject(bkgnd_);

	// create bitmap and select into DC
	bkgnd_ = CreateCompatibleBitmap(hdc, w, h);
	ob = (HBITMAP)SelectObject(cdc, bkgnd_);
	SetBkColor(cdc, bclr);

	// background and grid
	FillRect(cdc, &r, bkg);
	MoveToEx(cdc, r.left, r.top, NULL);
	LineTo(cdc, r.right, r.top);
	LineTo(cdc, r.right, r.bottom);
	LineTo(cdc, r.left, r.bottom);
	LineTo(cdc, r.left, r.top);
	SelectObject(cdc, old);
	DeleteObject(grid);
	grid = CreatePen(PS_DASH, 1, RGB(0, 0, 0));
	SelectObject(cdc, grid);
	for (int i = 1; i < 6; ++i)
	{
		MoveToEx(cdc, r.left + i * 50, r.bottom, NULL);
		LineTo(cdc, r.left + i * 50, r.top);

		MoveToEx(cdc, r.left, r.bottom - i * 50, NULL);
		LineTo(cdc, r.right, r.bottom - i * 50);
	}

	// default curve
	MoveToEx(cdc, r.left, r.bottom, NULL);
	LineTo(cdc, r.right, r.top);

	// free resource
	SelectObject(cdc, old);
	SelectObject(cdc, ob);
	DeleteDC(cdc);
	ReleaseDC(hwnd(), hdc);

	DeleteObject(bkg);
	DeleteObject(grid);
}
void dlg_gamma::init_curve(GAMMACURVE* curv, COLORREF clr)
{
	curv->points.clear();
	curv->points.push_back({ 0, 0 });
	curv->points.push_back({ 255, 255 });
	curv->coefs = calc::coefs_from_points(curv->points);
	curv->drag = -1;
	curv->left = 0;
	curv->right = 1;
	curv->clr = clr;
}
int dlg_gamma::add_drag_point(int x, int y)
{
	int ind = -1;

	if (cur_->points.size() < MAX_KEY_POINTS + 2)
	{
		for (int i = 2; i < (int)cur_->points.size(); ++i)
		{
			if (x < cur_->points[i].x)
			{
				cur_->points.insert(cur_->points.begin() + i, { x, calc_value(x) });
				ind = i;
				cur_->coefs = calc::coefs_from_points(cur_->points);
				break;
			}
			else if (x == cur_->points[i].x)
			{
				ind = i;
				break;
			}
		}
		if (ind == -1)
		{
			ind = cur_->points.size();
			cur_->points.push_back({ x, calc_value(x) });
			cur_->coefs = calc::coefs_from_points(cur_->points);
		}
		cur_->left = ind - 1;
		cur_->right = ind + 1;
		if (cur_->left == 1)
			cur_->left = 0;
		if (cur_->right >= (int)cur_->points.size())
			cur_->right = 1;
	}
	else
	{
		for (int i = 2; i < (int)cur_->points.size(); ++i)
		{
			if (x == cur_->points[i].x)
			{
				ind = i;
				cur_->left = ind - 1;
				cur_->right = ind + 1;
				if (cur_->left == 1)
					cur_->left = 0;
				if (cur_->right >= (int)cur_->points.size())
					cur_->right = 1;
				break;
			}
		}
	}
	cur_->drag = ind;

	return ind;
}
BYTE dlg_gamma::calc_value(BYTE x)
{
	double y = .0f;
	for(int j = 0; j < (int)cur_->points.size(); ++j)
		y += cur_->coefs[j] * calc::power(x, cur_->points.size() - j - 1);

	if (y > 255.0f)
		y = 255.0f;
	if (y < .0f)
		y = .0f;
	
	bool upper = cur_->points[1].y > cur_->points[0].y;
	if (y < cur_->points[!upper].y)
		y = cur_->points[!upper].y;
	if (y > cur_->points[upper].y)
		y = cur_->points[upper].y;

	return (BYTE)(y + .5f);
}
bool dlg_gamma::is_adjacent(POINT p1, POINT p2)
{
	bool neighbour = abs(p1.x - p2.x) <= 3 && abs(p1.y - p2.y) <= 3;

	return neighbour;
}
bool dlg_gamma::hit_test(int* x, int* y)
{
	for (int i = 2; i < (int)cur_->points.size(); ++i)
	{
		POINT	pt = { *x, *y };
		if (is_adjacent(pt, cur_->points[i]))
		{
			*x = cur_->points[i].x;
			*y = cur_->points[i].y;
			return true;
		}
	}


	int		val = calc_value(*x), tolerant = 3;
	bool	hit = false;

	if (abs(val - *y) < tolerant)
	{
		*y = val;
		hit = true;
	}
	else
	{
		int l = *x - tolerant,
			u = *x + tolerant;
		if (l < 0)
			l = 0;
		if (u > 255)
			u = 255;
		for (; l <= u; ++l)
		{
			val = calc_value(l);
			if (abs(val - *y) < tolerant)
			{
				hit = true;
				*x = l;
				*y = val;
				break;
			}
		}
	}

	return hit;
}
void dlg_gamma::draw_ellipse(HDC hdc, POINT center, int xl, int yl)
{
	center.x += paint_area_.left;
	center.y = paint_area_.bottom - center.y;

	HRGN	rgn = CreateEllipticRgn(center.x - xl, center.y - yl, center.x + xl, center.y + yl);
	HBRUSH	brsh = CreateSolidBrush(RGB(255, 0, 255));
	FillRgn(hdc, rgn, brsh);
	DeleteObject(brsh);
	DeleteObject(rgn);
}
void dlg_gamma::draw_current_curve(HDC hdc)
{
	MoveToEx(hdc, paint_area_.left + cur_->points[0].x, paint_area_.bottom - cur_->points[0].y, NULL);
	for (int i = 0; i < 256; ++i)
	{
		int y = calc_value(i);
		LineTo(hdc, paint_area_.left + i, paint_area_.bottom - y);
	}
}

void dlg_gamma::on_init_dlg(void)
{
	HWND	combo = get_item(IDC_SCHEME);

	GetWindowRect(get_item(IDC_STATIC_PAINT), &paint_area_);
	screen_2_client(&paint_area_);
	paint_area_.right = paint_area_.left + 255;
	paint_area_.bottom = paint_area_.top + 255;
	create_background();

	init_curve(&rgb_gray_);
	init_curve(&red_, RGB(255, 0, 0));
	init_curve(&green_, RGB(0, 255, 0));
	init_curve(&blue_, RGB(0, 0, 255));

	std::wstring	lang(dlg_base::language_from_hz936(L"\u81ea\u5b9a\u4e49"));
	SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
	lang = dlg_base::language_from_hz936(L"\u8d1f\u7247") + L" (RGB)";
	SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
	lang = dlg_base::language_from_hz936(L"\u5f69\u8272\u8d1f\u7247") + L" (RGB)";
	SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
	lang = dlg_base::language_from_hz936(L"\u8f83\u6697") + L" (RGB)";
	SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
	lang = dlg_base::language_from_hz936(L"\u8f83\u4eae") + L" (RGB)";
	SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
	SendMessage(combo, CB_SETCURSEL, 0, 0);

	combo = get_item(IDC_CHANNEL);
	if (is_color_)
	{
		SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)L"RGB");
		lang = dlg_base::language_from_hz936(L"\u7ea2");
		SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
		lang = dlg_base::language_from_hz936(L"\u7eff");
		SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
		lang = dlg_base::language_from_hz936(L"\u84dd");
		SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
	}
	else
	{
		lang = dlg_base::language_from_hz936(L"\u7070");
		SendMessageW(combo, CB_ADDSTRING, 0, (LPARAM)&lang[0]);
	}
	SendMessage(combo, CB_SETCURSEL, 0, 0);
	cur_ = &rgb_gray_;

	SetDlgItemInt(hwnd(), IDC_EDIT_INPUT, 0, FALSE);
	SetDlgItemInt(hwnd(), IDC_EDIT_OUTPUT, 0, FALSE);
}
void dlg_gamma::on_paint(HDC hdc)
{
	HPEN	pen = CreatePen(PS_SOLID, 1, cur_->clr),
			drag = CreatePen(PS_SOLID, 1, RGB(255, 0, 255)),
			old = (HPEN)SelectObject(hdc, pen);
	HDC		cdc = CreateCompatibleDC(hdc);
	HBITMAP	ob = (HBITMAP)SelectObject(cdc, bkgnd_);

	BitBlt(hdc, paint_area_.left - 1, paint_area_.top - 1, paint_area_.right - paint_area_.left + 2, paint_area_.bottom - paint_area_.top + 2,
			cdc, 0, 0, SRCCOPY);
	SelectObject(cdc, ob);
	DeleteDC(cdc);

	if (show_all_)
	{
		GAMMACURVE* prev = cur_;
		HPEN	now = NULL;

		cur_ = &red_;
		now = CreatePen(PS_SOLID, 1, cur_->clr);
		SelectObject(hdc, now);
		draw_current_curve(hdc);

		cur_ = &green_;
		SelectObject(hdc, old);
		DeleteObject(now);
		now = CreatePen(PS_SOLID, 1, cur_->clr);
		SelectObject(hdc, now);
		draw_current_curve(hdc);

		cur_ = &blue_;
		SelectObject(hdc, old);
		DeleteObject(now);
		now = CreatePen(PS_SOLID, 1, cur_->clr);
		SelectObject(hdc, now);
		draw_current_curve(hdc);

		SelectObject(hdc, pen);
		DeleteObject(now);
		cur_ = prev;
	}
	else
		draw_current_curve(hdc);
	SelectObject(hdc, drag);

	for (int i = 0; i < (int)cur_->points.size(); ++i)
	{
		draw_ellipse(hdc, cur_->points[i], 3, 3);
	}
	SelectObject(hdc, old);

	DeleteObject(pen);
}
void dlg_gamma::on_mouse_move(DWORD key, int x, int y)
{
	POINT	pt = { x, y };

	if (PtInRect(&paint_area_, pt))
	{
		x -= paint_area_.left;
		y = paint_area_.bottom - y;
		if (key == MK_LBUTTON && cur_->drag != -1)
		{
			if (x <= cur_->points[cur_->left].x)
				x = cur_->points[cur_->left].x + 1;
			else if (x >= cur_->points[cur_->right].x)
				x = cur_->points[cur_->right].x - 1;
			cur_->points[cur_->drag].x = x;
			cur_->points[cur_->drag].y = y;
			cur_->coefs = calc::coefs_from_points(cur_->points);
			InvalidateRect(hwnd(), NULL, FALSE);
		}
		else if (key == MK_CONTROL)
		{
			y = calc_value(x);
			pt.y = paint_area_.bottom - y;
			ClientToScreen(hwnd(), &pt);
			SetCursorPos(pt.x, pt.y);
		}
		SetDlgItemInt(hwnd(), IDC_EDIT_INPUT, x, FALSE);
		SetDlgItemInt(hwnd(), IDC_EDIT_OUTPUT, y, FALSE);
	}
}
void dlg_gamma::on_lbutton_down(int x, int y)
{
	x -= paint_area_.left;
	y = paint_area_.bottom - y;
	if (hit_test(&x, &y))
	{
		if(add_drag_point(x, y) != -1)
			SetCapture(hwnd());
	}
}
void dlg_gamma::on_lbutton_up(int x, int y)
{
	cur_->drag = -1;
	cur_->left = 0;
	cur_->right = 1;
	ReleaseCapture();
}
void dlg_gamma::on_combo_sel_changed(int id, int sel)
{
	show_all_ = false;
	if (id == IDC_SCHEME)
	{
		if (sel == 1)
		{
			cur_ = &rgb_gray_;
			init_curve(cur_);
			cur_->points.clear();
			cur_->points.push_back({ 0, 255 });
			cur_->points.push_back({ 255, 0 });
			cur_->coefs = calc::coefs_from_points(cur_->points);
		}
		else if (sel == 2)
		{
			show_all_ = true;
			cur_ = &red_;
			init_curve(cur_, cur_->clr);
			cur_->points.clear();
			cur_->points.push_back({ 33, 255 });
			cur_->points.push_back({ 185, 0 });
			cur_->points.push_back({ 119, 127 });
			cur_->coefs = calc::coefs_from_points(cur_->points);

			cur_ = &green_;
			init_curve(cur_, cur_->clr);
			cur_->points.clear();
			cur_->points.push_back({ 28, 255 });
			cur_->points.push_back({ 132, 0 });
			cur_->points.push_back({ 77, 127 });
			cur_->coefs = calc::coefs_from_points(cur_->points);

			cur_ = &blue_;
			init_curve(cur_, cur_->clr);
			cur_->points.clear();
			cur_->points.push_back({ 25, 255 });
			cur_->points.push_back({ 108, 0 });
			cur_->points.push_back({ 60, 127 });
			cur_->coefs = calc::coefs_from_points(cur_->points);

			cur_ = &red_;
		}
		else if (sel == 3)
		{
			cur_ = &rgb_gray_;
			init_curve(cur_);
			cur_->points.push_back({ 130, 101 });
			cur_->coefs = calc::coefs_from_points(cur_->points);
		}
		else if (sel == 4)
		{
			cur_ = &rgb_gray_;
			init_curve(cur_);
			cur_->points.push_back({ 103, 125 });
			cur_->coefs = calc::coefs_from_points(cur_->points);
		}
		InvalidateRect(hwnd(), NULL, FALSE);
	}
	else if (id == IDC_CHANNEL)
	{
		GAMMACURVE* prev = cur_, * all[] = { &rgb_gray_, &red_, &green_, &blue_ };

		cur_ = all[sel];
		if (prev != cur_)
		{
			if (cur_->points.size() == 2)
			{
				COLORREF	clr = cur_->clr;

				*cur_ = *prev;
				cur_->clr = clr;
			}
			InvalidateRect(hwnd(), NULL, FALSE);
		}
	}
}

int dlg_gamma::do_modal(HWND parent)
{
	BOOL	enable_parent = FALSE,
			got = TRUE;
	MSG		msg = { 0 };

	if (IsWindow(parent) && parent != GetDesktopWindow())
	{
		EnableWindow(parent, FALSE);
		enable_parent = TRUE;
	}

	ShowWindow(hwnd(), SW_SHOW);
	while ((got = GetMessage(&msg, NULL, 0, 0)))
	{
		if ((DWORD)got == -1)
			break;
		
		//if (enable_parent && msg.hwnd == parent &&
		//	msg.message >= WM_MOUSEFIRST && msg.message <= WM_MOUSELAST &&
		//	msg.message >= WM_KEYFIRST && msg.message <= WM_KEYLAST)
		//	continue;

		TranslateMessage(&msg);
		DispatchMessage(&msg);
		if (exit_code_ == IDOK || exit_code_ == IDCANCEL)
			break;
	}
	ShowWindow(hwnd(), SW_HIDE);

	if (enable_parent)
	{
		EnableWindow(parent, TRUE);
	}

	return exit_code_;
}
void dlg_gamma::get_gamma(SANE_Gamma* gamma)
{
	gamma->apply_to_back = SANE_FALSE;
	//if (cur_ == &rgb_gray_)
	{
		cur_ = &rgb_gray_;
		gamma->pt_count = (SANE_Byte)(cur_->points.size() - 2);
	//	gamma->pt_count_r = gamma->pt_count_g = gamma->pt_count_b = 0;
		for (int i = 2; i < (int)cur_->points.size(); ++i)
		{
			gamma->keypoint[i - 2].x = (SANE_Byte)cur_->points[i].x;
			gamma->keypoint[i - 2].y = (SANE_Byte)cur_->points[i].y;
		}

		for (int i = 0; i < 256; ++i)
			gamma->table[i] = calc_value(i);
	}
	//else
	{
	//	gamma->pt_count = 0;

		cur_ = &red_;
		gamma->pt_count_r = (SANE_Byte)(cur_->points.size() - 2);
		for (int i = 2; i < (int)cur_->points.size(); ++i)
		{
			gamma->keypoint_r[i - 2].x = (SANE_Byte)cur_->points[i].x;
			gamma->keypoint_r[i - 2].y = (SANE_Byte)cur_->points[i].y;
		}
		for (int i = 0; i < 256; ++i)
			gamma->table[i] = calc_value(i);

		cur_ = &green_;
		gamma->pt_count_g = (SANE_Byte)(cur_->points.size() - 2);
		for (int i = 2; i < (int)cur_->points.size(); ++i)
		{
			gamma->keypoint_g[i - 2].x = (SANE_Byte)cur_->points[i].x;
			gamma->keypoint_g[i - 2].y = (SANE_Byte)cur_->points[i].y;
		}
		for (int i = 0; i < 256; ++i)
			gamma->table[256 + i] = calc_value(i);

		cur_ = &blue_;
		gamma->pt_count_b = (SANE_Byte)(cur_->points.size() - 2);
		for (int i = 2; i < (int)cur_->points.size(); ++i)
		{
			gamma->keypoint_b[i - 2].x = (SANE_Byte)cur_->points[i].x;
			gamma->keypoint_b[i - 2].y = (SANE_Byte)cur_->points[i].y;
		}
		for (int i = 0; i < 256; ++i)
			gamma->table[512 + i] = calc_value(i);
	}
}
void dlg_gamma::set_gamma(const SANE_Gamma* gamma, bool gray)
{
	int	sel = 0;
	std::wstring	text(L"");

	SendMessage(get_item(IDC_CHANNEL), CB_RESETCONTENT, 0, 0);
	is_color_ = !gray;
	cur_ = &rgb_gray_;
	init_curve(cur_);
	for (int i = 0; i < gamma->pt_count; ++i)
	{
		POINT	pt = { gamma->keypoint[i].x, gamma->keypoint[i].y };
		cur_->points.push_back(pt);
	}
	cur_->coefs = calc::coefs_from_points(cur_->points);
	if (is_color_)
	{
		SendMessageW(get_item(IDC_CHANNEL), CB_ADDSTRING, 0, (LPARAM)L"RGB");
	}
	else
	{
		text = dlg_base::language_from_hz936(L"\u7070");
		SendMessageW(get_item(IDC_CHANNEL), CB_ADDSTRING, 0, (LPARAM)&text[0]);
	}

	if(!gray)
	{
		is_color_ = true;
		cur_ = &red_;
		init_curve(cur_);
		for (int i = 0; i < gamma->pt_count_r; ++i)
		{
			POINT	pt = { gamma->keypoint_r[i].x, gamma->keypoint_r[i].y };
			cur_->points.push_back(pt);
		}
		cur_->coefs = calc::coefs_from_points(cur_->points);

		cur_ = &green_;
		init_curve(cur_);
		for (int i = 0; i < gamma->pt_count_g; ++i)
		{
			POINT	pt = { gamma->keypoint_g[i].x, gamma->keypoint_g[i].y };
			cur_->points.push_back(pt);
		}
		cur_->coefs = calc::coefs_from_points(cur_->points);

		cur_ = &blue_;
		init_curve(cur_);
		for (int i = 0; i < gamma->pt_count_b; ++i)
		{
			POINT	pt = { gamma->keypoint_b[i].x, gamma->keypoint_b[i].y };
			cur_->points.push_back(pt);
		}
		cur_->coefs = calc::coefs_from_points(cur_->points);

	//	SendMessageW(get_item(IDC_CHANNEL), CB_ADDSTRING, 0, (LPARAM)L"RGB");
		text = dlg_base::language_from_hz936(L"\u7ea2");
		SendMessageW(get_item(IDC_CHANNEL), CB_ADDSTRING, 0, (LPARAM)&text[0]);
		text = dlg_base::language_from_hz936(L"\u7eff");
		SendMessageW(get_item(IDC_CHANNEL), CB_ADDSTRING, 0, (LPARAM)&text[0]);
		text = dlg_base::language_from_hz936(L"\u84dd");
		SendMessageW(get_item(IDC_CHANNEL), CB_ADDSTRING, 0, (LPARAM)&text[0]);
	}
	cur_ = &rgb_gray_;
	sel = 0;
	SendMessage(get_item(IDC_CHANNEL), CB_SETCURSEL, sel, 0);
	SendMessage(get_item(IDC_SCHEME), CB_SETCURSEL, 0, 0);
}