// File: text.cpp
// Written by:
// Grant Macklem (Grant.Macklem@colorado.edu)
// Gregory Schmelter (Gregory.Schmelter@colorado.edu)
// Alan Schmidt (Alan.Schmidt@colorado.edu)
// Ivan Stashak (Ivan.Stashak@colorado.edu)
// CSCI 4830/7818: API Programming
// University of Colorado at Boulder, Spring 2003
// http://www.cs.colorado.edu/~main/bgi
//
// This file contains the code necessary to draw/modify text
//
#include <windows.h> // Provides the Win32 API
#include <windowsx.h> // Provides GDI helper macros
#include <iostream>
#include <sstream> // Provides ostringstream
#include <string> // Provides string
#include "winbgim.h" // API routines
#include "winbgitypes.h" // Internal structure data
/*****************************************************************************
*
* Some very useful arrays -- Same as previous version for consistency
* Also, the exported definition of bgiout.
*
*****************************************************************************/
std::ostringstream bgiout;
static int font_weight[] =
{
FW_BOLD, // DefaultFont
FW_NORMAL, // TriplexFont
FW_NORMAL, // SmallFont
FW_NORMAL, // SansSerifFont
FW_NORMAL, // GothicFont
FW_NORMAL, // ScriptFont
FW_NORMAL, // SimplexFont
FW_NORMAL, // TriplexScriptFont
FW_NORMAL, // ComplexFont
FW_NORMAL, // EuropeanFont
FW_BOLD // BoldFont
};
static int font_family[] =
{
FIXED_PITCH|FF_DONTCARE, // DefaultFont
VARIABLE_PITCH|FF_ROMAN, // TriplexFont
VARIABLE_PITCH|FF_MODERN, // SmallFont
VARIABLE_PITCH|FF_DONTCARE, // SansSerifFont
VARIABLE_PITCH|FF_SWISS, // GothicFont
VARIABLE_PITCH|FF_SCRIPT, // ScriptFont
VARIABLE_PITCH|FF_DONTCARE, // SimplexFont
VARIABLE_PITCH|FF_SCRIPT, // TriplexScriptFont
VARIABLE_PITCH|FF_DONTCARE, // ComplexFont
VARIABLE_PITCH|FF_DONTCARE, // EuropeanFont
VARIABLE_PITCH|FF_DONTCARE // BoldFont
};
static const char* font_name[] =
{
"Console", // DefaultFont
"Times New Roman", // TriplexFont
"Small Fonts", // SmallFont
"MS Sans Serif", // SansSerifFont
"Arial", // GothicFont
"Script", // ScriptFont
"Times New Roman", // SimplexFont
"Script", // TriplexScriptFont
"Courier New", // ComplexFont
"Times New Roman", // EuropeanFont
"Courier New Bold", // BoldFont
};
static struct { int width; int height; } font_metrics[][11] = {
{{0,0},{8,8},{16,16},{24,24},{32,32},{40,40},{48,48},{56,56},{64,64},{72,72},{80,80}}, // DefaultFont
{{0,0},{13,18},{14,20},{16,23},{22,31},{29,41},{36,51},{44,62},{55,77},{66,93},{88,124}}, // TriplexFont
{{0,0},{3,5},{4,6},{4,6},{6,9},{8,12},{10,15},{12,18},{15,22},{18,27},{24,36}}, // SmallFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // SansSerifFont
{{0,0},{13,19},{14,21},{16,24},{22,32},{29,42},{36,53},{44,64},{55,80},{66,96},{88,128}}, // GothicFont
// These may not be 100% correct
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // ScriptFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // SimplexFont
{{0,0},{13,18},{14,20},{16,23},{22,31},{29,41},{36,51},{44,62},{55,77},{66,93},{88,124}}, // TriplexScriptFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // ComplexFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // EuropeanFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}} // BoldFont
};
// horiz LEFT_TEXT 0 left-justify text
// CENTER_TEXT 1 center text
// RIGHT_TEXT 2 right-justify text
// vertical BOTTOM_TEXT 0 bottom-justify text
// CENTER_TEXT 1 center text
// TOP_TEXT 2 top-justify text
static UINT horiz_align[3] = {TA_LEFT, TA_CENTER, TA_RIGHT};
static UINT vert_align[3] = {TA_BOTTOM, TA_BASELINE, TA_TOP};
/*****************************************************************************
*
* Some helper functions
*
*****************************************************************************/
// This function
// POSTCONDITION:
//
static void set_align(WindowData* pWndData)
{
UINT alignment = pWndData->alignment;
// if we are vertical, things are swapped.
if (pWndData->textInfo.direction == HORIZ_DIR)
{
alignment |= horiz_align[pWndData->textInfo.horiz];
alignment |= vert_align[pWndData->textInfo.vert];
}
else
{
alignment |= horiz_align[pWndData->textInfo.vert];
alignment |= vert_align[pWndData->textInfo.horiz];
}
// set the alignment for all valid pages.
for ( int i = 0; i < MAX_PAGES; i++ )
SetTextAlign(pWndData->hDC[i], alignment);
}
// This function updates the current hdc with the user defined font
// POSTCONDITION: text written to the current hdc will be in the new font
//
static void set_font(WindowData* pWndData)
{
int mindex;
double xscale, yscale;
HFONT hFont;
// get the scaling factors based on charsize
if(pWndData->textInfo.charsize == 0)
{
xscale = pWndData->t_scale[0] / pWndData->t_scale[1];
yscale = pWndData->t_scale[2] / pWndData->t_scale[3];
// if font zero, only use factors.. else also multiply by 4
if (pWndData->textInfo.font == 0)
mindex = 0;
else
mindex = 4;
}
else
{
xscale = 1.0;
yscale = 1.0;
mindex = pWndData->textInfo.charsize;
}
// with the scaling decided, make a font.
hFont = CreateFont(
int(font_metrics[pWndData->textInfo.font][mindex].height * yscale),
int(font_metrics[pWndData->textInfo.font][mindex].width * xscale),
pWndData->textInfo.direction * 900,
(pWndData->textInfo.direction & 1) * 900,
font_weight[pWndData->textInfo.font],
FALSE,
FALSE,
FALSE,
DEFAULT_CHARSET,
OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS,
DEFAULT_QUALITY,
font_family[pWndData->textInfo.font],
font_name[pWndData->textInfo.font]
);
// assign the fonts to each of the hdcs
for ( int i = 0; i < MAX_PAGES; i++ )
SelectObject( pWndData->hDC[i], hFont );
}
/*****************************************************************************
*
* The actual API calls are implemented below
*
*****************************************************************************/
// This function fills the textsettingstype structure pointed to by textinfo
// with information about the current text font, direction, size, and
// justification.
// POSTCONDITION: texttypeinfo has been filled with the proper information
//
void gettextsettings(struct textsettingstype *texttypeinfo)
{
// if its null, leave.
if (!texttypeinfo)
return;
WindowData* pWndData = BGI__GetWindowDataPtr( );
*texttypeinfo = pWndData->textInfo;
}
// This function prints textstring to the screen at the current position
// POSTCONDITION: text has been written to the screen using the current font,
// direction, and size. In addition, the current position has
// been modified to reflect the text that was just output.
//
void outtext(char *textstring)
{
HDC hDC = BGI__GetWinbgiDC( );
WindowData* pWndData = BGI__GetWindowDataPtr( );
// so we can clear the screen
POINT cp;
GetCurrentPositionEx( hDC, &cp );
// check cp alignment
if (pWndData->alignment != TA_UPDATECP)
{
pWndData->alignment = TA_UPDATECP;
set_align(pWndData);
}
TextOut(hDC, 0, 0, (LPCTSTR)textstring, strlen(textstring));
BGI__ReleaseWinbgiDC( );
RefreshWindow( NULL );
// Todo: Change to refresh only the needed part.
}
// This function prints textstring to x,y
// POSTCONDITION: text has been written to the screen using the current font,
// direction, and size. If a string is printed with the default
// font using outtext or outtextxy, any part of the string that
// extends outside the current viewport is truncated.
//
void outtextxy(int x, int y, char *textstring)
{
HDC hDC = BGI__GetWinbgiDC( );
WindowData* pWndData = BGI__GetWindowDataPtr( );
// check alignment
if (pWndData->alignment != TA_NOUPDATECP)
{
pWndData->alignment = TA_NOUPDATECP;
set_align(pWndData);
}
TextOut(hDC, x, y, (LPCTSTR)textstring, strlen(textstring));
BGI__ReleaseWinbgiDC( );
RefreshWindow( NULL );
// Todo: Change to refresh only the needed part.
}
// This function sets the vertical and horizontal justification based on CP
// POSTCONDITION: Text output is justified around the current position as
// has been specified.
//
void settextjustify(int horiz, int vert)
{
WindowData* pWndData = BGI__GetWindowDataPtr( );
pWndData->textInfo.horiz = horiz;
pWndData->textInfo.vert = vert;
WaitForSingleObject(pWndData->hDCMutex, 5000);
set_align(pWndData);
ReleaseMutex(pWndData->hDCMutex);
}
// This function sets the font and it's properties that will be used
// by all text output related functions.
// POSTCONDITION: text output after a call to settextstyle should be
// in the newly specified format.
//
void settextstyle(int font, int direction, int charsize)
{
WindowData* pWndData = BGI__GetWindowDataPtr( );
pWndData->textInfo.font = font;
pWndData->textInfo.direction = direction;
pWndData->textInfo.charsize = charsize;
WaitForSingleObject(pWndData->hDCMutex, 5000);
set_font(pWndData);
ReleaseMutex(pWndData->hDCMutex);
}
// This function sets the size of stroked fonts
// POSTCONDITION: these values will be used when charsize is zero in the
// settextstyle assignments. consequently output text will
// be scaled by the appropriate x and y values when output.
//
void setusercharsize(int multx, int divx, int multy, int divy)
{
WindowData* pWndData = BGI__GetWindowDataPtr( );
pWndData->t_scale[0] = multx;
pWndData->t_scale[1] = divx;
pWndData->t_scale[2] = multy;
pWndData->t_scale[3] = divy;
WaitForSingleObject(pWndData->hDCMutex, 5000);
set_font(pWndData);
ReleaseMutex(pWndData->hDCMutex);
}
// This function returns the height in pixels of textstring using the current
// text output settings.
// POSTCONDITION: the height of the string in pixels has been returned.
//
int textheight( const char *textstring)
{
HDC hDC = BGI__GetWinbgiDC( );
SIZE tb;
GetTextExtentPoint32(hDC, (LPCTSTR) textstring, strlen(textstring), &tb);
BGI__ReleaseWinbgiDC( );
return tb.cy;
}
// This function returns the width in pixels of textstring using the current
// text output settings.
// POSTCONDITION: the width of the string in pixels has been returned.
//
int textwidth(char *textstring)
{
HDC hDC = BGI__GetWinbgiDC( );
SIZE tb;
GetTextExtentPoint32(hDC, (LPCTSTR) textstring, strlen(textstring), &tb);
BGI__ReleaseWinbgiDC( );
return tb.cx;
}
void outstreamxy(int x, int y, std::ostringstream& out)
{
std::string all, line;
int i;
int startx = x;
all = out.str( );
out.str("");
moveto(x,y);
for (i = 0; i < all.length( ); i++)
{
if (all[i] == '\n')
{
if (line.length( ) > 0)
outtext((char *) line.c_str( ));
y += textheight("X");
x = startx;
line.clear( );
moveto(x,y);
}
else
line += all[i];
}
if (line.length( ) > 0)
outtext((char *) line.c_str( ));
}
void outstream(std::ostringstream& out)
{
outstreamxy(getx( ), gety( ), out);
}
![C/C++ - [C] Problema dell'esecuzione di programmi scritti con la libreria graphics.h](/data/logos/logositov9.png)
| 
