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Controls.cpp
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////////////////////////////////////////////////////////////////////////////////
// //
// PaperBack -- high density backups on the plain paper //
// //
// Copyright (c) 2007 Oleh Yuschuk //
// ollydbg at t-online de (set Subject to 'paperback' or be filtered out!) //
// //
// //
// This file is part of PaperBack. //
// //
// Paperback is free software; you can redistribute it and/or modify it under //
// the terms of the GNU General Public License as published by the Free //
// Software Foundation; either version 3 of the License, or (at your option) //
// any later version. //
// //
// PaperBack is distributed in the hope that it will be useful, but WITHOUT //
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or //
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for //
// more details. //
// //
// You should have received a copy of the GNU General Public License along //
// with this program. If not, see <http://www.gnu.org/licenses/>. //
// //
// //
// Note that bzip2 compression/decompression library, which is the part of //
// this project, is covered by different license, which, in my opinion, is //
// compatible with GPL. //
// //
////////////////////////////////////////////////////////////////////////////////
#include <windows.h>
#include <commctrl.h>
#include <stdio.h>
#include <dir.h>
#include <mem.h>
#include <math.h>
#include "twain.h"
#include "bzlib\bzlib.h"
#include "aes\aes.h"
#pragma hdrstop
#include "paperbak.h"
#include "resource.h"
static HFONT hfont20; // 20-point bold font
static int font20height; // Real height of hfont20
////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////// BUTTONS ////////////////////////////////////
#define BTN_PRINT 1000 // Identifier of Print button
#define BTN_SCAN 1001 // Identifier of Scan button
#define BTN_READ 1002 // Identifier of Open bitmap button
#define BTN_STOP 1003 // Identifier of Stop button
#define BTN_PAGE 1004 // Identifier of Page setup button
#define BTN_OPTIONS 1005 // Identifier of Options button
#define BTN_CLOSE 1006 // Identifier of Close button
static HWND hbuttonframe; // Frame that owns the buttons
static HWND hprint; // Print button
static HWND hscan; // Scan button
static HWND hopen; // Open bitmap button
static HWND hstop; // Interrupt current operation
static HWND hpage; // Page setup button
static HWND hoptions; // Options button
static HWND hclose; // Close button
// Windows function of button frame.
LRESULT CALLBACK Buttonframewp(HWND hw,UINT msg,WPARAM wp,LPARAM lp) {
RECT rc;
PAINTSTRUCT ps;
HDC dc;
switch (msg) {
case WM_ERASEBKGND:
return 1; // Erasing is not necessary
case WM_PAINT:
GetClientRect(hw,&rc);
dc=BeginPaint(hw,&ps);
FillRect(dc,&rc,graybrush);
EndPaint(hw,&ps);
break;
case WM_COMMAND:
if (HIWORD(wp)!=BN_CLICKED)
break;
switch (LOWORD(wp)) {
case BTN_PRINT: // Print button pressed
if (Selectinfile()==0)
Printfile(infile,NULL);
break;
case BTN_SCAN: // Scan button pressed
OpenTWAINinterface();
Updatebuttons();
break;
case BTN_READ: // Open bitmap button pressed
Decodebitmap(NULL);
break;
case BTN_STOP: // Stop button pressed
Stopbitmapdecoding(&procdata);
Stopprinting(&printdata);
Clearqueue();
Updatebuttons();
Message("Processing interrupted",0);
break;
case BTN_PAGE: // Page setup button pressed
Setuppage();
break;
case BTN_OPTIONS: // Options button pressed
Options();
break;
case BTN_CLOSE: // Close button pressed
PostMessage(hwmain,WM_CLOSE,0,0);
break;
};
break;
default: return DefWindowProc(hw,msg,wp,lp);
};
return 0L;
};
// Enables or disables buttons according to the processing mode. Button "Close"
// is always enabled.
void Updatebuttons(void) {
if (procdata.step!=0 || printdata.step!=0) {
EnableWindow(hprint,0);
EnableWindow(hscan,0);
EnableWindow(hopen,0);
EnableWindow(hstop,1);
EnableWindow(hpage,0);
EnableWindow(hoptions,0); }
else {
EnableWindow(hprint,1);
if (twainstate<=1) {
EnableWindow(hscan,0);
EnableWindow(hopen,1); }
else if (twainstate<=3) {
EnableWindow(hscan,1);
EnableWindow(hopen,1); }
else {
EnableWindow(hscan,0);
EnableWindow(hopen,0); };
EnableWindow(hstop,0);
EnableWindow(hpage,1);
EnableWindow(hoptions,1);
};
// Now update the whole main window.
RedrawWindow(hwmain,NULL,NULL,RDW_UPDATENOW|RDW_ALLCHILDREN);
SetFocus(hwmain);
};
// Creates button frame and fills it with buttons. Frame owns buttons and so
// receives their BN_CLICKED notifications.
void Createbuttons(RECT *rc) {
int x,dx;
WNDCLASS wc;
// Register window class of button frame.
wc.style=CS_OWNDC;
wc.lpfnWndProc=Buttonframewp;
wc.cbClsExtra=wc.cbWndExtra=0;
wc.hInstance=hinst;
wc.hIcon=NULL;
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=graybrush;
wc.lpszMenuName=NULL;
wc.lpszClassName=BUTTONFRAME;
if (!RegisterClass(&wc))
return;
// Create button frame.
hbuttonframe=CreateWindow(
BUTTONFRAME,"",WS_CHILD|WS_VISIBLE|WS_CLIPCHILDREN,
rc->left,rc->top+2,rc->right-rc->left,BUTTONDY,
hwmain,NULL,hinst,NULL);
if (hbuttonframe==NULL)
return;
rc->top+=(BUTTONDY+DELTA+4);
// Calculate button width. Button frame contains 7 buttons.
dx=(rc->right-rc->left-(7-1)*DELTA)/7;
x=0;
// Create Print button.
hprint=CreateWindow("BUTTON","Print",
WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
x,0,dx,BUTTONDY,
hbuttonframe,(HMENU)BTN_PRINT,hinst,NULL);
SendMessage(hprint,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
x+=dx+DELTA;
// Create Scan button.
hscan=CreateWindow("BUTTON","Scan",
WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
x,0,dx,BUTTONDY,
hbuttonframe,(HMENU)BTN_SCAN,hinst,NULL);
SendMessage(hscan,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
x+=dx+DELTA;
// Create Open bitmap button.
hopen=CreateWindow("BUTTON","Open bitmap",
WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
x,0,dx,BUTTONDY,
hbuttonframe,(HMENU)BTN_READ,hinst,NULL);
SendMessage(hopen,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
x+=dx+DELTA;
// Create Stop button.
hstop=CreateWindow("BUTTON","Stop",
WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
x,0,dx,BUTTONDY,
hbuttonframe,(HMENU)BTN_STOP,hinst,NULL);
SendMessage(hstop,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
x+=dx+DELTA;
// Create Page setup button.
hpage=CreateWindow("BUTTON","Page setup",
WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
x,0,dx,BUTTONDY,
hbuttonframe,(HMENU)BTN_PAGE,hinst,NULL);
SendMessage(hpage,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
x+=dx+DELTA;
// Create Options button.
hoptions=CreateWindow("BUTTON","Options",
WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
x,0,dx,BUTTONDY,
hbuttonframe,(HMENU)BTN_OPTIONS,hinst,NULL);
SendMessage(hoptions,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
x+=dx+DELTA;
// Create Close button. It takes all the remaining space.
hclose=CreateWindow("BUTTON","Close",
WS_VISIBLE|WS_CHILD|BS_PUSHBUTTON,
x,0,rc->right-rc->left-x,BUTTONDY,
hbuttonframe,(HMENU)BTN_CLOSE,hinst,NULL);
SendMessage(hclose,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
// Enable or disable buttons according to the actual state.
Updatebuttons();
};
////////////////////////////////////////////////////////////////////////////////
/////////////////////////// PROGRESS AND MESSAGE BAR ///////////////////////////
static HWND hprogress; // Progress and message bar
static char message[TEXTLEN]; // Text to display
static int showpercent; // Percentage (error if negative)
// Windows function of progress and message bar.
LRESULT CALLBACK Progresswp(HWND hw,UINT msg,WPARAM wp,LPARAM lp) {
int n;
char s[TEXTLEN+32];
RECT rblack,rwhite;
PAINTSTRUCT ps;
HDC dc;
switch (msg) {
case WM_ERASEBKGND:
return 1; // Erasing is not necessary
case WM_PAINT:
// Prepare text and calculate its length.
n=sprintf(s,"%s",message);
if (showpercent>0) n+=sprintf(s+n," - %i %%",showpercent);
// Prepare left and right rectangles.
GetClientRect(hw,&rblack);
rwhite=rblack;
if (showpercent<=0)
rblack.right=rblack.left;
else
rblack.right=rwhite.left=(rblack.right-rblack.left)*showpercent/100;
dc=BeginPaint(hw,&ps);
SelectObject(dc,hfont20);
SetTextAlign(dc,TA_TOP|TA_CENTER);
// Draw left rectangle - white text on black background.
SetTextColor(dc,RGB(255,255,255));
SetBkColor(dc,RGB(0,0,0));
ExtTextOut(dc,(rblack.left+rwhite.right)/2,1,
ETO_CLIPPED|ETO_OPAQUE,&rblack,s,n,NULL);
// Draw second rectangle - black or lightred text on white or gray
// background.
if (showpercent<0)
SetTextColor(dc,RGB(255,48,48));
else
SetTextColor(dc,RGB(0,0,0));
if (showpercent<=0)
SetBkColor(dc,GetSysColor(COLOR_BTNFACE));
else
SetBkColor(dc,RGB(255,255,255));
ExtTextOut(dc,(rblack.left+rwhite.right)/2,1,
ETO_CLIPPED|ETO_OPAQUE,&rwhite,s,n,NULL);
EndPaint(hw,&ps);
break;
default: return DefWindowProc(hw,msg,wp,lp);
};
return 0L;
};
// Creates progress and message bar and places it at the top of the specified
// rectangle.
HWND Createprogressbar(RECT *rc) {
int dy;
WNDCLASS wc;
// Register window class of progress bar.
wc.style=CS_OWNDC;
wc.lpfnWndProc=Progresswp;
wc.cbClsExtra=wc.cbWndExtra=0;
wc.hInstance=hinst;
wc.hIcon=NULL;
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=GetStockObject(WHITE_BRUSH);
wc.lpszMenuName=NULL;
wc.lpszClassName=PROGRESSCLASS;
if (!RegisterClass(&wc))
return NULL;
// Calculate required height of progress bar.
dy=font20height+2*GetSystemMetrics(SM_CXFRAME);
// Set initial text to display in progress bar.
sprintf(message,"PaperBack v%i.%02i",VERSIONHI,VERSIONLO);
showpercent=0;
// Create bar.
hprogress=CreateWindowEx(
WS_EX_CLIENTEDGE,PROGRESSCLASS,"",
WS_CHILD|WS_VISIBLE,
rc->left,rc->top,rc->right-rc->left,dy,
hwmain,NULL,hinst,NULL);
if (hprogress!=NULL)
rc->top+=(dy+DELTA);
return hprogress;
};
// Displays error message.
void Reporterror(char *text) {
if (hprogress==NULL || text==NULL) return;
strncpy(message,text,TEXTLEN-1);
message[TEXTLEN-1]='\0';
showpercent=-1;
RedrawWindow(hprogress,NULL,NULL,RDW_INVALIDATE|RDW_UPDATENOW);
};
// Displays progress. Call with percent=0 to display plain message.
void Message(char *text,int percent) {
if (hprogress==NULL || text==NULL) return;
if (percent==showpercent && strncmp(message,text,TEXTLEN-1)==0)
return; // Unchanged appearance
strncpy(message,text,TEXTLEN-1);
message[TEXTLEN-1]='\0';
showpercent=max(0,min(percent,100));
RedrawWindow(hprogress,NULL,NULL,RDW_INVALIDATE|RDW_UPDATENOW);
};
// Destroys progress bar and associated resources. Not absolutely necessary
// because Windows cleans up when application closes.
void Destroyprogressbar(void) {
DestroyWindow(hprogress); hprogress=NULL;
UnregisterClass(PROGRESSCLASS,hinst);
};
////////////////////////////////////////////////////////////////////////////////
///////////////////////////////// DATA DISPLAY /////////////////////////////////
#define BSEL_GRID 1000 // Identifier of Show grid box
#define BSEL_BAD 1001 // Identifier of Show bad dots box
#define BSEL_NONE 1002 // Identifier of No overlay box
#define BSEL_POS 1003 // Identifier of coordinate window
#define BSEL_LEFT 1004 // Identifier of L button
#define BSEL_RIGHT 1005 // Identifier of R button
#define BSEL_UP 1006 // Identifier of U button
#define BSEL_DOWN 1007 // Identifier of D button
static HWND hdataframe; // Frame that owns the data tab
static HWND hdatatab; // Data tab control
static HWND hdisplay; // Window that displays decoded data
static int displaymode; // Display mode, one of DISP_xxx
// Viewing parameters used in DISP_QUALITY mode.
static HBRUSH htone[17]; // Quality brushes
static HBRUSH hbad; // Brush for unreadable blocks
static uchar *qualitymap; // Quality map (255: empty, 17: bad)
static int mapnx; // Map size in X, blocks
static int mapny; // Map size in Y, blocks
static int mapscale; // Map scale, pixels per block
static RECT maprect; // Page rectangle, pixels
// Viewing parameters used in DISP_BLOCK mode.
static HDC blockdc; // Memory DC that keeps block image
static HBITMAP blockbmp; // Bitmap that keeps block image
static uchar *blockbits; // Pointer to block image bitmap
static int blockdx; // X size of block image bitmap
static int blockdy; // Y size of block image bitmap
static int blockindex; // Index of displayed block
// Controls in block selection window.
static HWND hblocksel; // Block selection window
static HWND hshowgrid; // Always show full grid
static HWND hshowbad; // Show only frames around bad pixels
static HWND hshownone; // Show neither grid nor frames
static HWND hpos; // Window displaying block coordinates
static HWND hleft; // Move left selector
static HWND hright; // Move right selector
static HWND hup; // Move up selector
static HWND hdown; // Move down selector
static int blockselx; // X index of selected block
static int blocksely; // Y index of selected block
static int blockdotmode; // Overlay mode, one of BSEL_xxx
// Windows function of data frame window. This window is fully covered by the
// data tab, so drawing is not necessary.
LRESULT CALLBACK Dataframewp(HWND hw,UINT msg,WPARAM wp,LPARAM lp) {
int i;
switch (msg) {
case WM_NOTIFY:
if (((NMHDR *)lp)->hwndFrom!=hdatatab ||
((NMHDR *)lp)->code!=TCN_SELCHANGE) break;
i=SendMessage(hdatatab,TCM_GETCURSEL,0,0);
Setdisplaymode(i);
break;
default: return DefWindowProc(hw,msg,wp,lp);
};
return 0;
};
// Windows function of data display window.
LRESULT CALLBACK Displaywp(HWND hw,UINT msg,WPARAM wp,LPARAM lp) {
int i,j,answer;
uchar *pm;
t_data result;
RECT rc;
HDC dc;
PAINTSTRUCT ps;
switch (msg) {
case WM_ERASEBKGND:
return 1; // Erasing is not necessary
case WM_LBUTTONDBLCLK:
// Doubleclick in block display mode changes to quality map.
if (displaymode==DISP_BLOCK) {
Setdisplaymode(DISP_QUALITY);
RedrawWindow(hw,NULL,NULL,RDW_UPDATENOW);
break; };
// Doubleclick on block in quality map mode displays block.
if (displaymode!=DISP_QUALITY || mapnx<=0 || mapny<=0 || mapscale<=0)
break;
i=(LOWORD(lp)-maprect.left)/mapscale;
j=(HIWORD(lp)-maprect.top)/mapscale;
if (i>=0 && i<mapnx && j>=0 && j<mapny) {
Setdisplaymode(DISP_BLOCK);
answer=Decodeblock(&procdata,i,j,&result);
Displayblockimage(&procdata,i,j,answer,&result);
RedrawWindow(hw,NULL,NULL,RDW_UPDATENOW); };
break;
case WM_PAINT:
GetClientRect(hw,&rc);
dc=BeginPaint(hw,&ps);
if (displaymode==DISP_QUALITY && qualitymap!=NULL && mapnx>0 && mapny>0) {
// Draw quality map.
FillRect(dc,&rc,graybrush);
FillRect(dc,&maprect,GetStockObject(WHITE_BRUSH));
rc.bottom=maprect.top;
for (j=0; j<mapny; j++) {
rc.top=rc.bottom; rc.bottom+=mapscale;
rc.right=maprect.left;
pm=qualitymap+j*mapnx;
for (i=0; i<mapnx; i++,pm++) {
rc.left=rc.right; rc.right+=mapscale;
if (*pm==0xFF) continue; // Block is not yet processed
if (*pm<=16) FillRect(dc,&rc,htone[*pm]);
else FillRect(dc,&rc,hbad);
};
}; }
else if (displaymode==DISP_BLOCK && blockdc!=NULL && blockbits!=NULL) {
// Draw data block.
BitBlt(dc,0,0,blockdx,blockdy,blockdc,0,0,SRCCOPY); }
else
// Nothing to draw.
FillRect(dc,&rc,graybrush);
EndPaint(hw,&ps);
break;
default: return DefWindowProc(hw,msg,wp,lp);
};
return 0L;
};
// Window function of block selection window.
LRESULT CALLBACK Blockselectionwp(HWND hw,UINT msg,WPARAM wp,LPARAM lp) {
int answer;
t_data result;
RECT rc;
HDC dc;
PAINTSTRUCT ps;
switch (msg) {
case WM_ERASEBKGND:
return 1; // Erasing is not necessary
case WM_PAINT:
GetClientRect(hw,&rc);
dc=BeginPaint(hw,&ps);
SelectObject(dc,GetStockObject(BLACK_PEN));
MoveToEx(dc,rc.left,rc.top,NULL);
LineTo(dc,rc.right,rc.top);
rc.top++;
FillRect(dc,&rc,graybrush);
EndPaint(hw,&ps);
break;
case WM_COMMAND:
if (HIWORD(wp)!=BN_CLICKED)
break;
switch (LOWORD(wp)) {
case BSEL_GRID: // Show grid radio button clicked
case BSEL_BAD: // Show bad dots radio button clicked
case BSEL_NONE: // No overlay radio button clicked
if (blockdotmode!=LOWORD(wp)) {
blockdotmode=LOWORD(wp);
CheckRadioButton(hblocksel,BSEL_GRID,BSEL_NONE,blockdotmode);
answer=Decodeblock(&procdata,blockselx,blocksely,&result);
Displayblockimage(&procdata,blockselx,blocksely,answer,&result);
RedrawWindow(hdisplay,NULL,NULL,RDW_UPDATENOW); };
break;
case BSEL_LEFT: // Move selection left
Changeblockselection(VK_LEFT); break;
case BSEL_RIGHT: // Move selection right
Changeblockselection(VK_RIGHT); break;
case BSEL_UP: // Move selection up
Changeblockselection(VK_UP); break;
case BSEL_DOWN: // Move selection down
Changeblockselection(VK_DOWN);
break;
};
SetFocus(hwmain);
break;
default: return DefWindowProc(hw,msg,wp,lp);
};
return 0;
};
// Creates block selection window that owns block navigation buttons, block
// indicator and grid checkbox.
static HWND Createblockselector(HWND howner) {
RECT rcowner;
WNDCLASS wc;
// Register class of block selection window.
wc.style=CS_OWNDC;
wc.lpfnWndProc=Blockselectionwp;
wc.cbClsExtra=wc.cbWndExtra=0;
wc.hInstance=hinst;
wc.hIcon=NULL;
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=NULL;
wc.lpszMenuName=NULL;
wc.lpszClassName=BLOCKSELCLASS;
if (!RegisterClass(&wc))
return NULL;
// Create window. Note that initially this window is hidden.
GetClientRect(howner,&rcowner);
hblocksel=CreateWindow(BLOCKSELCLASS,"",
WS_CHILD|WS_CLIPCHILDREN,
0,rcowner.bottom-75,rcowner.right,75,
howner,NULL,hinst,NULL);
if (hblocksel==NULL)
return NULL;
// Create overlay selection radio buttons.
hshowgrid=CreateWindow("BUTTON","Show grid",
WS_CHILD|WS_VISIBLE|BS_RADIOBUTTON ,
6,7,100,20,
hblocksel,(HMENU)BSEL_GRID,hinst,NULL);
SendMessage(hshowgrid,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
hshowbad=CreateWindow("BUTTON","Show bad dots",
WS_CHILD|WS_VISIBLE|BS_RADIOBUTTON ,
6,29,100,20,
hblocksel,(HMENU)BSEL_BAD,hinst,NULL);
SendMessage(hshowbad,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
hshownone=CreateWindow("BUTTON","No overlay",
WS_CHILD|WS_VISIBLE|BS_RADIOBUTTON ,
6,51,100,20,
hblocksel,(HMENU)BSEL_NONE,hinst,NULL);
SendMessage(hshownone,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
CheckRadioButton(hblocksel,BSEL_GRID,BSEL_NONE,BSEL_BAD);
blockdotmode=BSEL_BAD;
// Create position display.
hpos=CreateWindowEx(WS_EX_CLIENTEDGE,"STATIC","",
WS_CHILD|WS_VISIBLE|WS_BORDER|SS_CENTER,
(rcowner.right-130)/2,14,130,48,
hblocksel,(HMENU)BSEL_POS,hinst,NULL);
SendMessage(hpos,WM_SETFONT,(WPARAM)hfont20,0);
// Create cursor buttons.
hleft=CreateWindow("BUTTON","L",
WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
rcowner.right-110,23,32,32,
hblocksel,(HMENU)BSEL_LEFT,hinst,NULL);
SendMessage(hleft,WM_SETFONT,(WPARAM)hfont20,0);
hright=CreateWindow("BUTTON","R",
WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
rcowner.right-36,23,32,32,
hblocksel,(HMENU)BSEL_RIGHT,hinst,NULL);
SendMessage(hright,WM_SETFONT,(WPARAM)hfont20,0);
hup=CreateWindow("BUTTON","U",
WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
rcowner.right-73,5,32,32,
hblocksel,(HMENU)BSEL_UP,hinst,NULL);
SendMessage(hup,WM_SETFONT,(WPARAM)hfont20,0);
hdown=CreateWindow("BUTTON","D",
WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,
rcowner.right-73,41,32,32,
hblocksel,(HMENU)BSEL_DOWN,hinst,NULL);
SendMessage(hdown,WM_SETFONT,(WPARAM)hfont20,0);
return hblocksel;
};
// Shows or hides block selector.
static void Showblockselector(int show) {
ShowWindow(hblocksel,show?SW_RESTORE:SW_HIDE);
};
// Creates tab with display window (includes quality map and block view) and
// places it in the right half of the specified rectangle.
HWND Createdisplay(RECT *rc) {
int i,leftpos;
uchar buf[sizeof(BITMAPINFO)+256*sizeof(RGBQUAD)];
BITMAPINFO *pbmi;
RECT rcd;
WNDCLASS wc;
TCITEM titem;
HDC dc;
// Register class of display frame window.
wc.style=CS_OWNDC;
wc.lpfnWndProc=Dataframewp;
wc.cbClsExtra=wc.cbWndExtra=0;
wc.hInstance=hinst;
wc.hIcon=NULL;
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=NULL;
wc.lpszMenuName=NULL;
wc.lpszClassName=DATAFRAMECLASS;
if (!RegisterClass(&wc))
return NULL;
// Register class of display window.
wc.style=CS_OWNDC|CS_DBLCLKS;
wc.lpfnWndProc=Displaywp;
wc.cbClsExtra=wc.cbWndExtra=0;
wc.hInstance=hinst;
wc.hIcon=NULL;
wc.hCursor=LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground=graybrush;
wc.lpszMenuName=NULL;
wc.lpszClassName=DISPLAYCLASS;
if (!RegisterClass(&wc))
return NULL;
// Create data frame - dummy window with sole purpose to intercept tab
// notifications within this source file.
leftpos=(rc->right+rc->left+DELTA)/2;
hdataframe=CreateWindow(DATAFRAMECLASS,"",
WS_CHILD|WS_VISIBLE|WS_CLIPCHILDREN,
leftpos,rc->top,rc->right-leftpos,rc->bottom-rc->top,
hwmain,NULL,hinst,NULL);
if (hdataframe==NULL) return NULL;
// Create tab wrapper.
hdatatab=CreateWindow(WC_TABCONTROL,"",
WS_CHILD|WS_VISIBLE|WS_CLIPCHILDREN|WS_TABSTOP|TCS_TABS,
0,0,rc->right-leftpos,rc->bottom-rc->top,
hdataframe,NULL,hinst,NULL);
if (hdatatab==NULL) {
DestroyWindow(hdataframe);
return NULL; };
SendMessage(hdatatab,WM_SETFONT,(WPARAM)GetStockObject(ANSI_VAR_FONT),0);
// Add tabs for quality map and block view.
memset(&titem,0,sizeof(titem));
titem.mask=TCIF_TEXT;
titem.pszText="Quality map";
SendMessage(hdatatab,TCM_INSERTITEM,DISP_QUALITY,(LPARAM)&titem);
titem.pszText="Blocks";
SendMessage(hdatatab,TCM_INSERTITEM,DISP_BLOCK,(LPARAM)&titem);
// Create brushes to display quality map. 0 errors: green; 16 errors (maximum
// allowed by implemented version of ECC): red; unrecoverable blocks: black.
for (i=0; i<17; i++)
htone[i]=CreateSolidBrush(RGB(119+8*i,119+8*(16-i),64));
hbad=GetStockObject(BLACK_BRUSH);
// Set default display parameters.
displaymode=DISP_QUALITY;
mapnx=mapny=0;
// Create display window. The window is same for both tabs, I only redraw its
// contents.
GetClientRect(hdatatab,&rcd);
SendMessage(hdatatab,TCM_ADJUSTRECT,0,(LPARAM)&rcd);
rcd.top+=2;
hdisplay=CreateWindowEx(WS_EX_CLIENTEDGE,DISPLAYCLASS,"",
WS_CHILD|WS_VISIBLE|WS_CLIPCHILDREN,
rcd.left,rcd.top,rcd.right-rcd.left,rcd.bottom-rcd.top,
hdatatab,NULL,hinst,NULL);
// Create memory DC and allocate grayscale bitmap that will be used as a
// buffer for direct block drawing.
dc=GetDC(hdisplay);
blockdc=CreateCompatibleDC(dc);
if (blockdc==NULL) {
blockdx=blockdy=0;
blockbmp=NULL;
blockbits=NULL; }
else {
blockdx= // Bitmap scan lines are DWORD-aligned
(rcd.right-rcd.left) & 0xFFFFFFFC;
blockdy=rcd.bottom-rcd.top;
pbmi=(BITMAPINFO *)buf;
memset(pbmi,0,sizeof(BITMAPINFOHEADER));
pbmi->bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
pbmi->bmiHeader.biWidth=blockdx;
pbmi->bmiHeader.biHeight=blockdy;
pbmi->bmiHeader.biPlanes=1;
pbmi->bmiHeader.biBitCount=8;
pbmi->bmiHeader.biCompression=BI_RGB;
pbmi->bmiHeader.biSizeImage=0;
pbmi->bmiHeader.biClrUsed=256;
pbmi->bmiHeader.biClrImportant=256;
// First 128 colors are different shades of gray, from black to white.
for (i=0; i<128; i++) {
pbmi->bmiColors[i].rgbBlue=(uchar)(i*2);
pbmi->bmiColors[i].rgbGreen=(uchar)(i*2);
pbmi->bmiColors[i].rgbRed=(uchar)(i*2);
pbmi->bmiColors[i].rgbReserved=0; };
// Last 128 colors are gray shades, in same order, under semi-transparent
// red. Alpha-blending for poor?..
for (i=128; i<256; i++) {
pbmi->bmiColors[i].rgbBlue=(uchar)(i-128);
pbmi->bmiColors[i].rgbGreen=(uchar)(i-128);
pbmi->bmiColors[i].rgbRed=(uchar)i;
pbmi->bmiColors[i].rgbReserved=0; };
blockbmp=CreateDIBSection(blockdc,pbmi,DIB_RGB_COLORS,
(void **)&blockbits,NULL,0);
SelectObject(blockdc,blockbmp);
// Fill memory bitmap with 20% gray. Note that this gray is different from
// the button gray, which is by the way not exactly gray in the default
// scheme, but who cares?
if (blockbits!=NULL) {
memset(blockbits,128*80/100,blockdx*blockdy);
};
};
ReleaseDC(hdisplay,dc);
blockindex=0;
// Create block selection window and immediately hide it, because this tool
// is necessary only in DISP_BLOCK view.
Createblockselector(hdisplay);
Showblockselector(0);
// Correct rectangle and report success.
rc->right=leftpos-DELTA;
return hdatatab;
};
// Sets display mode: quality map (DISP_QUALITY) or block picture (DISP_BLOCK).
void Setdisplaymode(int mode) {
if (mode!=displaymode) {
displaymode=mode;
SendMessage(hdatatab,TCM_SETCURSEL,mode,0);
Showblockselector(mode==DISP_BLOCK);
InvalidateRect(hdisplay,NULL,FALSE);
};
};
// Starts new quality map for page with maximal nx*ny blocks.
void Initqualitymap(int nx,int ny) {
int x0,y0;
RECT rc;
// Delete previous quality map.
if (qualitymap!=NULL)
GlobalFree((HGLOBAL)qualitymap);
// Allocate new quality map. Value 0xFF means non-processed element.
if (nx<=0 || ny<=0)
qualitymap=NULL;
else {
qualitymap=(uchar *)GlobalAlloc(GMEM_FIXED,nx*ny);
if (qualitymap==NULL) nx=ny=0;
else memset(qualitymap,0xFF,nx*ny); };
// Calculate map geometry.
if (nx>0 && ny>0) {
GetClientRect(hdisplay,&rc);
mapscale=min((rc.right-1)/nx,(rc.bottom-1)/ny);
if (mapscale<1) mapscale=1;
x0=(rc.right-mapscale*nx-1)/2; if (x0<0) x0=0;
y0=(rc.bottom-mapscale*ny-1)/2; if (y0<0) y0=0;
maprect.left=x0; maprect.right=x0+mapscale*nx+1;
maprect.top=y0; maprect.bottom=y0+mapscale*ny+1; }
else {
mapscale=0;
maprect.left=maprect.right=0;
maprect.top=maprect.bottom=0; };
mapnx=nx;
mapny=ny;
blockselx=blocksely=0;
// Update image on the screen.
if (displaymode==DISP_QUALITY)
InvalidateRect(hdisplay,NULL,FALSE);
;
};
// Adds state of block in column x and row y to quality map.
void Addblocktomap(int x,int y,int nrestored) {
RECT rc;
HDC dc;
if (qualitymap==NULL || x<0 || x>=mapnx || y<0 || y>=mapny)
return; // Bad parameters or uninitialized map
qualitymap[y*mapnx+x]=(uchar)nrestored;
if (displaymode==DISP_QUALITY) {
rc.left=maprect.left+x*mapscale;
rc.right=rc.left+mapscale;
rc.top=maprect.top+y*mapscale;
rc.bottom=rc.top+mapscale;
dc=GetDC(hdisplay);
if (nrestored>=17)
FillRect(dc,&rc,hbad);
else
FillRect(dc,&rc,htone[nrestored]);
ReleaseDC(hdisplay,dc);
};
};
// Draws block image to the memory context and, if block tab is active,
// displays it on the screen.
void Displayblockimage(t_procdata *pdata,int posx,int posy,
int answer,t_data *result) {
int i,j,x,x0,x1,y,y0,y1,n;
int bufx,bufy,bufdx,bufdy,scale,orientation;
ulong baddots[32],u;
float xpeak,xstep,ypeak,ystep,fscale,offsetx,offsety;
char s[128];
uchar *buf,*pbuf,*pblock;
if (blockdc==NULL || blockbits==NULL)
return; // Block display is not initialized
// Preset bitmap to 20% gray.
memset(blockbits,128*80/100,blockdx*blockdy);
// Draw block.
if (pdata!=NULL && pdata->unsharp!=NULL && pdata->xstep>0 && pdata->ystep>0) {
// Get frequently used variables.
bufdx=pdata->bufdx;
bufdy=pdata->bufdy;
if (answer>=0) { // Block recognized
xpeak=pdata->blockxpeak;
xstep=pdata->blockxstep;
ypeak=pdata->blockypeak;
ystep=pdata->blockystep; }
else { // Block not recognized, show center
xstep=pdata->xstep;
xpeak=(bufdx-xstep)/2.0;
ystep=pdata->ystep;
ypeak=(bufdy-ystep)/2.0; };
buf=pdata->unsharp;
orientation=pdata->orientation;
// Determine scaling factor. Integer factor is much easier to handle. I use
// mean block size. Local size differs only slightly but may cause scale
// variations from one block to another.
scale=min(blockdx/(pdata->xstep*1.1),blockdy/(pdata->ystep*1.1));
if (scale<1) scale=1;
fscale=scale;
// Calculate offset between display amd buffer (pdata->unsharp) coordinates.
offsetx=xpeak+(xstep-blockdx/fscale)*0.5;
if (blockdy<blockdx) // Draw in the middle
offsety=ypeak+(ystep-blockdy/fscale)*0.5;
else // Align to top
offsety=ypeak+(ystep-(2*blockdy-blockdx)/fscale)*0.5;
// Draw block.
x0=(xpeak-xstep*0.1-offsetx)*fscale+0.5;
if (x0<0) x0=0;
x1=(xpeak+xstep*1.1-offsetx)*fscale+0.5;
if (x1>blockdx) x1=blockdx;
y0=(ypeak-ystep*0.1-offsety)*fscale+0.5;
if (y0<0) y0=0;
y1=(ypeak+ystep*1.1-offsety)*fscale+0.5;
if (y1>blockdy) y1=blockdy;
for (y=y0; y<y1; y++) {
bufy=y/fscale+offsety;
if (bufy<0) continue;
if (bufy>=bufdy) break;
pbuf=buf+bufy*bufdx;
pblock=blockbits+y*blockdx+x0;
for (x=x0; x<x1; x++,pblock++) {
bufx=x/fscale+offsetx;
if (bufx<0) continue;
if (bufx>=bufdx) break;
*pblock=(uchar)(pbuf[bufx]>>1);
};
};
// Draw block borders.
if (answer>=0 && blockdotmode!=BSEL_NONE) {
x0=(xpeak-offsetx)*fscale+1.5;
x1=(xpeak+xstep-offsetx)*fscale+1.5;
y0=(ypeak-offsety)*fscale+1.5;
y1=(ypeak+ystep-offsety)*fscale+1.5;
for (x=x0; x<=x1; x++) {
// Horizontal borders.
if (x<0) continue;
if (x>=blockdx) break;
if (y0>=0) blockbits[y0*blockdx+x]|=0x80;
if (y1<blockdy) blockbits[y1*blockdx+x]|=0x80; };
for (y=y0; y<=y1; y++) {
// Vertical borders.
if (y<0) continue;
if (y>=blockdy) break;
if (x0>=0) blockbits[y*blockdx+x0]|=0x80;
if (x1<blockdx) blockbits[y*blockdx+x1]|=0x80;
};
};
if (blockdotmode!=BSEL_NONE &&
(result==NULL || answer>=17 || blockdotmode==BSEL_GRID)
) {
// If data can't be restored, or on special request, draw grid. First
// vertical lines.
y0=(ypeak+ystep/(NDOT+3.0)*1.5-offsety)*fscale+1.5;
if (y0<0) y0=0;
y1=(ypeak+ystep/(NDOT+3.0)*(NDOT+1.5)-offsety)*fscale+1.5;
if (y1>=blockdy) y1=blockdy-1;
for (i=0; i<=NDOT; i++) {
x=(xpeak+xstep/(NDOT+3.0)*(i+1.5)-offsetx)*fscale+1.5;
if (x<0 || x>=blockdx) continue;
pblock=blockbits+y0*blockdx+x;
for (y=y0; y<=y1; y++,pblock+=blockdx) *pblock|=0x80; };
// Draw horizontal lines.
x0=(xpeak+xstep/(NDOT+3.0)*1.5-offsetx)*fscale+1.5;
if (x0<0) x0=0;
x1=(xpeak+xstep/(NDOT+3.0)*(NDOT+1.5)-offsetx)*fscale+1.5;
if (x1>=blockdx) x1=blockdx-1;
for (j=0; j<=NDOT; j++) {
y=(ypeak+ystep/(NDOT+3.0)*(j+1.5)-offsety)*fscale+1.5;
if (y<0 || y>=blockdy) continue;
pblock=blockbits+y*blockdx+x0;
for (x=x0; x<=x1; x++) *pblock++|=0x80;
}; }
else if (blockdotmode!=BSEL_NONE && answer>=0) {
// Data restored. Circumfere bad dots.
memcpy(baddots,result,sizeof(t_data));
for (i=0; i<32; i++)
baddots[i]^=((ulong *)&pdata->uncorrected)[i];
for (j=0; j<NDOT; j++) {
for (i=0; i<NDOT; i++) {
switch (orientation) {
case 0: u=baddots[i] & (1<<j); break;
case 1: u=baddots[NDOT-1-j] & (1<<i); break;
case 2: u=baddots[NDOT-1-i] & (1<<(NDOT-1-j)); break;
case 3: u=baddots[j] & (1<<(NDOT-1-i)); break;
case 4: u=baddots[j] & (1<<i); break;
case 5: u=baddots[i] & (1<<(NDOT-1-j)); break;
case 6: u=baddots[NDOT-1-j] & (1<<(NDOT-1-i)); break;
case 7: u=baddots[NDOT-1-i] & (1<<j); break; };
if (u==0)
continue;
x0=(xpeak+xstep/(NDOT+3.0)*(i+1.5)-offsetx)*fscale+1.5;
x1=(xpeak+xstep/(NDOT+3.0)*(i+2.5)-offsetx)*fscale+1.5;
y0=(ypeak+ystep/(NDOT+3.0)*(j+1.5)-offsety)*fscale+1.5;
y1=(ypeak+ystep/(NDOT+3.0)*(j+2.5)-offsety)*fscale+1.5;
if (x0<0 || x1>=blockdx || y0<0 || y1>=blockdy)
continue; // Draw only complete squares
for (x=x0; x<=x1; x++) {
blockbits[y0*blockdx+x]|=0x80;
blockbits[y1*blockdx+x]|=0x80; };
for (y=y0; y<=y1; y++) {
blockbits[y*blockdx+x0]|=0x80;
blockbits[y*blockdx+x1]|=0x80;
};
};
};
};
};
// Request repainting.
if (displaymode==DISP_BLOCK)
InvalidateRect(hdisplay,NULL,FALSE);
// Save coordinates of displayed block.
blockselx=posx;
blocksely=posy;
// Display coordinates and block quality.
if (pdata==NULL)
SetWindowText(hpos,"");
else {
n=sprintf(s,"(%i,%i)\n",posx,posy);
if (answer<0)
sprintf(s+n,"No frame");
else if (answer==0)
sprintf(s+n,"Good");
else if (answer==1)
sprintf(s+n,"1 byte bad");
else if (answer<17)
sprintf(s+n,"%i bytes bad",answer);
else
sprintf(s+n,"Unreadable");
SetWindowText(hpos,s);
};
};
int Changeblockselection(WPARAM wp) {
int x,y,answer;
t_data result;
if (displaymode!=DISP_BLOCK)
return 1; // Keystroke is not processed
x=blockselx;
y=blocksely;
switch (wp) {
case VK_LEFT: x--; break;
case VK_RIGHT: x++; break;
case VK_UP: y--; break;
case VK_DOWN: y++; break;
case VK_HOME: x=0; break;
case VK_END: x=mapnx-1; break;
case VK_PRIOR: y=0; break;
case VK_NEXT: y=mapny-1; break;
case VK_SPACE: // Space toggles grid (NONE - BAD)
if (blockdotmode==BSEL_BAD) blockdotmode=BSEL_NONE;
else blockdotmode=BSEL_BAD;
CheckRadioButton(hblocksel,BSEL_GRID,BSEL_NONE,blockdotmode);
break;
default: return 1; }; // Keystroke is not processed
if (x>=mapnx) x=mapnx-1; if (x<0) x=0;
if (y>=mapny) y=mapny-1; if (y<0) y=0;
if (wp==VK_SPACE || x!=blockselx || y!=blocksely) {
answer=Decodeblock(&procdata,x,y,&result);
Displayblockimage(&procdata,x,y,answer,&result);
RedrawWindow(hdisplay,NULL,NULL,RDW_UPDATENOW); };
return 0; // Keystroke processed