Hi .
How we can design graphical menus in c++ for a multimedia device ?
Thanks ...
Behi Jon 0 Light Poster
Narue 5,707 Bad Cop Team Colleague
We usually start by thinking about what we want. Then we might even draw it before working up a quick prototype. If the prototype meets out needs, we do the full implementation.
Behi Jon 0 Light Poster
I say that how we can combining graphic and c++ to design this menus .
For example, look at this codes :
/*
* volume screen coordinate constants
*/
#define VOL_ICON_DIMX 32
#define VOL_ICON_DIMY 32
static const unsigned int VolumeIcon [] = {
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xff00ffff, 0xffffffff,
0xffffffff, 0xffffffff, 0x0000ffff, 0xffffffff,
0xffffffff, 0xffffff00, 0x0000ffff, 0x00ffffff,
0xffffffff, 0xffff0000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0xff000000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0x00000000, 0x0000ff00, 0xff00ffff,
0xffffff00, 0x00000000, 0x0000ff00, 0xffff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ffff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0x00ffff00,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0xffffff00, 0x00000000, 0x0000ff00, 0xffff00ff,
0xffffffff, 0x00000000, 0x0000ff00, 0xff00ffff,
0xffffffff, 0xff000000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0xffff0000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0xffffff00, 0x0000ffff, 0x00ffffff,
0xffffffff, 0xffffffff, 0x0000ffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xff00ffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff
};
static unsigned char pel_mask[4096];What it say ?
Nick Evan 4,005 Industrious Poster Team Colleague Featured Poster
For example, look at this codes :
[..code..]What it say ?
It declares an int-array and loads it with values. The array is const static which means that the values in the array cannot be changed.
The second line of code declares a static unsigned char array with a size of 4096 elements. But it doesn't have any values yet. This is not a problem, because the second array isn't const, so the values may be loaded later.
:icon_wink:
Behi Jon 0 Light Poster
I think you don't understand my intention . How can I convert a graphical shape to data such as preceded example :
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, .................
How can I use graphic in c++ ? Don't say that I can use libraries . Because I want to compile the code for a micro of a multimedia device .
Behi Jon 0 Light Poster
I think you don't understand my intention . How can I convert a graphical shape to data such as preceded example :
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, .................
How can I use graphic in c++ ? Don't say that I can use libraries . Because I want to compile the code for a micro of a multimedia device .
Nick Evan 4,005 Industrious Poster Team Colleague Featured Poster
I think you don't understand my intention . How can I convert a graphical shape to data such as preceded example :
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, .................
That's not a graphical shape. It's data nothing more and nothing less.
How can I use graphic in c++ ? Don't say that I can use libraries .
Fine, I won't. But you actually do need them.
Behi Jon 0 Light Poster
What a pity that I can't convey my intention . All right . Thanks .
Behi Jon 0 Light Poster
Please see this codes :
/*
* VOL.C ver 0.1
*
* (c) Copyright SGS-Thomson Microelectronics Limited 1996.
*
* Source file name : VOL.C
* Authors T.H.Thillai Rajan (tht.rajan@st.com)
*
* Original Work: none
*
* =======================
* IMPROVEMENTS THOUGHT OF
* =======================
*
* =====================
* MODIFICATION HISTORY:
* =====================
*
* Date Initials Modification
* ---- -------- ------------
* 07.04.97 THT CREATED
*/
/*{{{ Include files*/
#include "appldef.h"
/*}}}*/
/*{{{ module dependant includes*/
#include "usif_ext.h"
/*}}}*/
/*
* volume screen coordinate constants
*/
#define VOL_ICON_DIMX 32
#define VOL_ICON_DIMY 32
static const unsigned int VolumeIcon [] = {
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xff00ffff, 0xffffffff,
0xffffffff, 0xffffffff, 0x0000ffff, 0xffffffff,
0xffffffff, 0xffffff00, 0x0000ffff, 0x00ffffff,
0xffffffff, 0xffff0000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0xff000000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0x00000000, 0x0000ff00, 0xff00ffff,
0xffffff00, 0x00000000, 0x0000ff00, 0xffff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ffff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0xff00ff00,
0x00000000, 0x00000000, 0x0000ffff, 0x00ffff00,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0x00000000, 0x00000000, 0x0000ffff, 0x00ff00ff,
0xffffff00, 0x00000000, 0x0000ff00, 0xffff00ff,
0xffffffff, 0x00000000, 0x0000ff00, 0xff00ffff,
0xffffffff, 0xff000000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0xffff0000, 0x0000ffff, 0xff00ffff,
0xffffffff, 0xffffff00, 0x0000ffff, 0x00ffffff,
0xffffffff, 0xffffffff, 0x0000ffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xff00ffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff
};
static unsigned char pel_mask[4096];
#define VOL_BOX_ROW_START 70
#define VOL_BOX_COL_START 344
#define VOL_BOX_WIDTH 222
#define VOL_BOX_HEIGHT 36
#define VOL_BOX_ROW_END ( VOL_BOX_ROW_START + VOL_BOX_HEIGHT )
#define VOL_BOX_COL_END ( VOL_BOX_COL_START + VOL_BOX_WIDTH )
#define VOL_ICON_ROW ( VOL_BOX_ROW_START + 2 )
#define VOL_ICON_COL ( VOL_BOX_COL_START + 4 )
#define VOL_SLIDE_BOX_ROW_START ( VOL_BOX_ROW_START + 2 )
#define VOL_SLIDE_BOX_COL_START ( VOL_BOX_COL_START + 40 )
#define VOL_SLIDE_BOX_WIDTH 176//342
#define VOL_SLIDE_BOX_HEIGHT 32
#define VOL_SLIDE_BOX_ROW_END ( VOL_SLIDE_BOX_ROW_START + VOL_SLIDE_BOX_HEIGHT )
#define VOL_SLIDE_BOX_COL_END ( VOL_SLIDE_BOX_COL_START + VOL_SLIDE_BOX_WIDTH )
/*
* CODE : DisplayVolume
* TYPE : sub-routine
* PROTOTYPE :
* int DisplayVolume ( char cInvokedBy );
*
* STACK : callers stack
* INPUT :
* a. cInvokedBy char
* identifies the type of the key which has invoked this function
*
* OUTPUT :
* a. iKeyValue int
* <= 0 Timed Out while waiting for active keys ( VOL+/ VOL-/ MUTE)
* > 0 the key scan code which was different from the active keys
*
* GLOBAL VARIABLES USED :
* a. tclkWaitDuration int ( W )
* b. bScreen2bCleared BOOLEAN ( W )
*
* DEVICES ACCESSED : nothing
* FUNCTIONS CALLED :
*
* CALLERS :
* a. usif_process ..\USIF\SOURCE\USIF.C
*
* PURPOSE:
* this routine displays the current volume level in graphical form.
*
* ALGORITHM:
* 1. Clear the screen and draw the outer rectangle box
* 2. wait for the user to press any of the active keys (VOL+/VOL-/MUTE)
* 3. if any keys other then active keys present then return to the caller
* with the actual key value read.
* 4. take appropriate action based on the active key value read.
* 5. goto step 2.
*
* IMPROVEMENT(s) THOUGHT OF:
*/
/*{{{ DisplayVolume ()*/
int DisplayVolume ( char cVolumeAction )
{
extern void mpeg_set_audio_volume_LR ( unsigned int left_volume, unsigned int right_volume );
int iKeyScanCode,i;
BOOLEAN bPrintMessage;
char cPrevVolLevel;
gprim_cls ( C_TRANS );
gprim_setfcol ( C_THIGHLIGHT );
gprim_setbcol ( C_BACKGROUNDDARK );
gprim_frect ( VOL_BOX_COL_START, VOL_BOX_ROW_START, VOL_BOX_COL_END, VOL_BOX_ROW_END );
switch ( cVolumeAction )
{
case INCREASE_VOLUME:
cCurVolLevel += VOLUME_STEP;
if ( cCurVolLevel >= MAX_VOL_LEVEL )
cCurVolLevel = MAX_VOL_LEVEL;
break;
case DECREASE_VOLUME:
cCurVolLevel -= VOLUME_STEP;
if ( cCurVolLevel < MIN_VOL_LEVEL )
cCurVolLevel = MIN_VOL_LEVEL;
break;
case MUTE_VOLUME:
if ( bAudioMuteState == TRUE )
{
bAudioMuteState = FALSE;
mpeg_unmute_audio ();
}
else
{
bAudioMuteState = TRUE;
mpeg_mute_audio ();
}
break;
}
bPrintMessage = TRUE;
cPrevVolLevel = cCurVolLevel;
gprim_setfcol ( C_TRANS );
gprim_setbcol ( C_THIGHLIGHT );
gprim_frect ( VOL_SLIDE_BOX_COL_START, VOL_SLIDE_BOX_ROW_START, VOL_SLIDE_BOX_COL_END, VOL_SLIDE_BOX_ROW_END );
while ( TRUE )
{
mpeg_set_audio_volume_LR ( cCurVolLevel, cCurVolLevel );
UpdateBoxVolInfo ( cCurVolLevel, cCurVolBalance, bAudioMuteState );
if ( bPrintMessage == TRUE )
{
bPrintMessage = FALSE;
gprim_setfcol ( C_THIGHLIGHT );
gprim_setbcol ( C_BACKGROUNDDARK );
gprim_frect ( VOL_ICON_COL, VOL_ICON_ROW, VOL_ICON_COL+32, VOL_ICON_ROW+32 );
gprim_setbcol ( C_THIGHLIGHT );
if ( bAudioMuteState == TRUE )
{
gprim_setfcol ( C_BACKMEDIUM );
ShowVolumeIcon();
gprim_line ( VOL_ICON_COL, VOL_ICON_ROW, VOL_ICON_COL + 32, VOL_ICON_ROW + 32 );
gprim_line ( VOL_ICON_COL, VOL_ICON_ROW+32, VOL_ICON_COL+32, VOL_ICON_ROW );
}
else
{
gprim_setfcol ( C_GREEN );
ShowVolumeIcon();
}
gprim_setbcol ( C_TRANS );
for(i=48; i<cCurVolLevel+1; i++)
gprim_frect ( VOL_SLIDE_BOX_COL_START+5+(i- MIN_VOL_LEVEL)*10, VOL_SLIDE_BOX_ROW_START+2, VOL_SLIDE_BOX_COL_START+5+(i- MIN_VOL_LEVEL)*10+5, VOL_SLIDE_BOX_ROW_END-4 );
}
wait_duration_forced_during = WAIT_AT_VOLUME_CONTROL;
if ( bAudioMuteState == TRUE )
tclkWaitDuration = INDEFINITE_WAIT;
else
tclkWaitDuration = WAIT_FOR_3_SEC;
cPrevVolLevel = cCurVolLevel;
if ( bAudioMuteState == TRUE )
{
gprim_setfcol ( C_BACKMEDIUM );
}
else
{
gprim_setfcol ( C_GREEN );
}
mpeg_set_audio_volume ( cCurVolLevel );
iKeyScanCode = ReadKey ( CURSOR_OFF, tclkWaitDuration );
switch ( iKeyScanCode )
{
case VOLUME_NEXT_KEY:
case VOL_UP_CUM_RIGHT_ARROW_KEY:
if ( bAudioMuteState == TRUE )
{
bAudioMuteState = FALSE;
mpeg_unmute_audio ();
bPrintMessage = TRUE;
}
cCurVolLevel += VOLUME_STEP;
if ( cCurVolLevel >= MAX_VOL_LEVEL )
cCurVolLevel = MAX_VOL_LEVEL;
if ( cPrevVolLevel != MAX_VOL_LEVEL )
gprim_frect ( VOL_SLIDE_BOX_COL_START+5+(cCurVolLevel- MIN_VOL_LEVEL)*10, VOL_SLIDE_BOX_ROW_START+2, VOL_SLIDE_BOX_COL_START+5+(cCurVolLevel- MIN_VOL_LEVEL)*10+5, VOL_SLIDE_BOX_ROW_START+VOL_SLIDE_BOX_HEIGHT-4 );
break;
case VOLUME_PREV_KEY:
case VOL_DOWN_CUM_LEFT_ARROW_KEY:
if ( bAudioMuteState == TRUE )
{
bAudioMuteState = FALSE;
mpeg_unmute_audio ();
bPrintMessage = TRUE;
}
cCurVolLevel -= VOLUME_STEP;
if ( cCurVolLevel < MIN_VOL_LEVEL )
cCurVolLevel = MIN_VOL_LEVEL;
if ( cPrevVolLevel != MIN_VOL_LEVEL )
{
gprim_setfcol ( C_TRANS );
gprim_frect ( VOL_SLIDE_BOX_COL_START+5+(cPrevVolLevel- MIN_VOL_LEVEL)*10, VOL_SLIDE_BOX_ROW_START+2, VOL_SLIDE_BOX_COL_START+5+(cPrevVolLevel- MIN_VOL_LEVEL)*10+5, VOL_SLIDE_BOX_ROW_START+VOL_SLIDE_BOX_HEIGHT-4 );
}
break;
case MUTE_KEY:
if ( bAudioMuteState == TRUE )
{
bAudioMuteState = FALSE;
mpeg_unmute_audio ();
}
else
{
bAudioMuteState = TRUE;
mpeg_mute_audio ();
}
bPrintMessage = TRUE;
break;
default:
gprim_cls ( C_TRANS );
return iKeyScanCode;
}
}
}
void ShowVolumeIcon()
{
int j;
int dim_x, dim_y;
unsigned int *pel;
int IabsX=VOL_ICON_COL;
int IabsY=VOL_ICON_ROW;
dim_x = VOL_ICON_DIMX ;
dim_y = VOL_ICON_DIMY ;
pel = (unsigned int *) VolumeIcon;
/* Make the Transparent Mask - Color 0 is transparent */
for (j = 0; j < (dim_x * dim_y) /8; j++ )
{
/* Transparency mask */
pel_mask[j] = ((pel[j] & 0xF0000000) != 0) << 7;
pel_mask[j] |= ((pel[j] & 0x0F000000) != 0) << 6;
pel_mask[j] |= ((pel[j] & 0x00F00000) != 0) << 5;
pel_mask[j] |= ((pel[j] & 0x000F0000) != 0) << 4;
pel_mask[j] |= ((pel[j] & 0x0000F000) != 0) << 3;
pel_mask[j] |= ((pel[j] & 0x00000F00) != 0) << 2;
pel_mask[j] |= ((pel[j] & 0x000000F0) != 0) << 1;
pel_mask[j] |= ((pel[j] & 0x0000000F) != 0);
}
gprim_setpel(dim_x, dim_y, true, pel, pel_mask , 0, 0);
gprim_pel(IabsX, IabsY);
}
/*}}}*/ Nick Evan 4,005 Industrious Poster Team Colleague Featured Poster
>> (c) Copyright SGS-Thomson Microelectronics Limited 1996.
Do they know you've just put their code on the web?
Do you have a question?
Behi Jon 0 Light Poster
that how this code works ?
Nick Evan 4,005 Industrious Poster Team Colleague Featured Poster
that how this code works ?
You can't just wack a code here and expect people to explain it to you line by line.
I know you probably want to be a l33t game hacker, but this is not the way to learn C/C++.
Start here and come back when you have a specific question about a specific problem or line.
William Hemsworth commented: :) +13
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