* on cycle, and the extents of the sinus pattern change in
* real-time.
* [06/22/99] - Shane Smit: Fixed delay to be fast and use little CPU :).
+ * [09/17/99] - Shane Smit: Made all calculations based on the size of the
+ * window. Thus, it'll look the same at 100x100 as it does at
+ * 1600x1200 ( Only smaller :).
*/
#include <math.h>
char *progclass = "ShadeBobs";
char *defaults [] = {
- "*degrees: 512",
+ "*degrees: 0", /* default: Automatic degree calculation */
"*color: random",
- "*count: 2",
- "*cycles: 50",
+ "*count: 4",
+ "*cycles: 10",
"*ncolors: 64", /* changing this doesn't work particularly well */
"*delay: 5000",
0
static unsigned short nMinExtentX, nMinExtentY;
static unsigned short nHalfWidth, nHalfHeight;
static char *sColor;
+static unsigned char nBobRadius, nBobDiameter;
+static float nExtentDelta;
#define RANDOM() ((int) (random() & 0X7FFFFFFFL))
/* Ahem. Chocolate is a flavor; not a food. Thank you */
-#define MAPSIZE 32
-
typedef struct
{
- char anDeltaMap[ MAPSIZE * MAPSIZE ]; /* 32 x 32 Delta Map */
+ signed char *anDeltaMap;
double nVelocityX, nVelocityY;
double nAngleX, nAngleY;
- short nExtentX, nExtentY;
+ float nExtentX, nExtentY;
} SShadeBob;
static void InitShadeBob( SShadeBob *pShadeBob, Bool bDark )
{
double nDelta;
- char iWidth, iHeight;
+ int iWidth, iHeight;
- for( iHeight=-16; iHeight<16; iHeight++ )
- for( iWidth=-16; iWidth<16; iWidth++ )
+ if( ( pShadeBob->anDeltaMap = calloc( nBobDiameter * nBobDiameter, sizeof(char) ) ) == NULL )
+ {
+ fprintf( stderr, "Could not allocate Delta Map!\n" );
+ return;
+ }
+
+ for( iHeight=-nBobRadius; iHeight<nBobRadius; iHeight++ )
+ for( iWidth=-nBobRadius; iWidth<nBobRadius; iWidth++ )
{
- nDelta = 9 - (sqrt( pow( iWidth+0.5, 2 ) + pow( iHeight+0.5, 2 ) ) / 2 );
+ nDelta = 9 - ( ( sqrt( pow( iWidth+0.5, 2 ) + pow( iHeight+0.5, 2 ) ) / nBobRadius ) * 8 );
if( nDelta < 0 ) nDelta = 0;
if( bDark ) nDelta = -nDelta;
- pShadeBob->anDeltaMap[ (iWidth+(MAPSIZE/2))*MAPSIZE
- + iHeight+(MAPSIZE/2) ] = (char)nDelta;
+ pShadeBob->anDeltaMap[ ( iWidth + nBobRadius ) * nBobDiameter
+ + iHeight + nBobRadius ] = (char)nDelta;
}
-
- ResetShadeBob( pShadeBob );
+
+ ResetShadeBob( pShadeBob );
}
pShadeBob->nAngleX += pShadeBob->nVelocityX;
pShadeBob->nAngleY += pShadeBob->nVelocityY;
- if( pShadeBob->nAngleX >= nDegreeCount ) pShadeBob->nAngleX -= nDegreeCount;
- else if( pShadeBob->nAngleX < 0 ) pShadeBob->nAngleX += nDegreeCount;
- if( pShadeBob->nAngleY >= nDegreeCount ) pShadeBob->nAngleY -= nDegreeCount;
- else if( pShadeBob->nAngleY < 0 ) pShadeBob->nAngleY += nDegreeCount;
+ if( pShadeBob->nAngleX >= nDegreeCount ) pShadeBob->nAngleX -= nDegreeCount;
+ if( pShadeBob->nAngleY >= nDegreeCount ) pShadeBob->nAngleY -= nDegreeCount;
- pShadeBob->nExtentX += ( RANDOM() % 5 ) - 2;
+ pShadeBob->nExtentX += ( ( ( RANDOM() % 5 ) - 2 ) / 2.0F ) * nExtentDelta;
if( pShadeBob->nExtentX > nMaxExtentX ) pShadeBob->nExtentX = nMaxExtentX;
if( pShadeBob->nExtentX < nMinExtentX ) pShadeBob->nExtentX = nMinExtentX;
- pShadeBob->nExtentY += ( RANDOM() % 5 ) - 2;
+ pShadeBob->nExtentY += ( ( ( RANDOM() % 5 ) - 2 ) / 2.0F ) * nExtentDelta;
if( pShadeBob->nExtentY > nMaxExtentY ) pShadeBob->nExtentY = nMaxExtentY;
if( pShadeBob->nExtentY < nMinExtentY ) pShadeBob->nExtentY = nMinExtentY;
nYPos = (unsigned int)(( anSinTable[ (int)pShadeBob->nAngleY ] * pShadeBob->nExtentY )
+ nHalfHeight);
- for( iHeight=0; iHeight < MAPSIZE; iHeight++ )
+ for( iHeight=0; iHeight<nBobDiameter; iHeight++ )
{
- for( iWidth=0; iWidth < MAPSIZE; iWidth++ )
+ for( iWidth=0; iWidth<nBobDiameter; iWidth++ )
{
nColor = XGetPixel( pXImage, nXPos + iWidth, nYPos + iHeight );
if( aXColors[ nIndex ].pixel == nColor )
break;
- nIndex += pShadeBob->anDeltaMap[ iWidth * MAPSIZE + iHeight ];
+ nIndex += pShadeBob->anDeltaMap[ iWidth * nBobDiameter + iHeight ];
if( nIndex >= ncolors ) nIndex = ncolors-1;
if( nIndex < 0 ) nIndex = 0;
aXColors[ nIndex ].pixel );
}
}
- /* Place graphics in window */
+
XPutImage( pDisplay, MainWindow, *pGC, pXImage,
- nXPos, nYPos, nXPos, nYPos, MAPSIZE, MAPSIZE );
+ nXPos, nYPos, nXPos, nYPos, nBobDiameter, nBobDiameter );
XSync (pDisplay, False);
}
False, True, False );
*ncolorsP = n1 + n2;
}
+
+ XSetWindowBackground( pDisplay, Win, aXColors[ 0 ].pixel );
}
static void Initialize( Display *pDisplay, Window Win,
- GC *pGC, XImage *pXImage,
+ GC *pGC, XImage **pXImage,
int *ncolorsP, XColor *aXColors )
{
XGCValues gcValues;
/* Create the GC. */
*pGC = XCreateGC( pDisplay, Win, 0, &gcValues );
- memset (pXImage, 0, sizeof(*pXImage));
- pXImage->width = XWinAttribs.width; /* Width of image */
- pXImage->height = XWinAttribs.height; /* Height of image */
- pXImage->format = ZPixmap; /* XYBitmap, XYPixmap, ZPixmap */
-
- /* Pointer to image data */
- pXImage->byte_order = ImageByteOrder(pDisplay);
- pXImage->bitmap_unit = BitmapUnit(pDisplay);
- pXImage->bitmap_bit_order = BitmapBitOrder(pDisplay);
- pXImage->bitmap_pad = BitmapPad(pDisplay);
- pXImage->depth = XWinAttribs.depth;
- pXImage->bytes_per_line = 0; /* Accelerator to next line */
- pXImage->bits_per_pixel = bpp;
- XInitImage( pXImage );
- pXImage->data = calloc(pXImage->bytes_per_line, pXImage->height);
+ *pXImage = XCreateImage(pDisplay, XWinAttribs.visual,
+ XWinAttribs.depth,
+ ZPixmap, 0, NULL,
+ XWinAttribs.width, XWinAttribs.height,
+ BitmapPad(pDisplay), 0);
+ (*pXImage)->data = calloc((*pXImage)->bytes_per_line,
+ (*pXImage)->height);
/* These are precalculations used in Execute(). */
- nMaxExtentX = ( XWinAttribs.width / 2 ) - 20;
- nMaxExtentY = ( XWinAttribs.height / 2 ) - 20;
+ nBobDiameter = XWinAttribs.width / 25;
+ nBobRadius = nBobDiameter / 2;
+ nExtentDelta = nBobRadius / 5.0F;
+#ifdef VERBOSE
+ printf( "Bob Diameter = %d\n", nBobDiameter );
+#endif
+
+ nHalfWidth = ( XWinAttribs.width / 2 ) - nBobRadius;
+ nHalfHeight = ( XWinAttribs.height / 2 ) - nBobRadius;
+ nMaxExtentX = nHalfWidth - nBobRadius;
+ nMaxExtentY = nHalfHeight - nBobRadius;
nMinExtentX = nMaxExtentX / 3;
nMinExtentY = nMaxExtentY / 3;
- nHalfWidth = ( XWinAttribs.width / 2 ) - 16;
- nHalfHeight = ( XWinAttribs.height / 2 ) - 16;
-
+
/* Create the Sin and Cosine lookup tables. */
nDegreeCount = get_integer_resource( "degrees", "Integer" );
- if( nDegreeCount < 90 ) nDegreeCount = 90;
- if( nDegreeCount > 5400 ) nDegreeCount = 5400;
+ if( nDegreeCount == 0 ) nDegreeCount = ( XWinAttribs.width / 6 ) + 400;
+ else if( nDegreeCount < 90 ) nDegreeCount = 90;
+ else if( nDegreeCount > 5400 ) nDegreeCount = 5400;
CreateTables( nDegreeCount );
-
+#ifdef VERBOSE
+ printf( "Using a %d degree circle.\n", nDegreeCount );
+#endif /* VERBOSE */
+
/* Get the colors. */
sColor = get_string_resource( "color", "Color" );
if( sColor == NULL)
GC gc;
int ncolors = 0;
XColor aXColors[ 256 ];
- XImage Image;
+ XImage *pImage;
unsigned char nShadeBobCount, iShadeBob;
SShadeBob *aShadeBobs;
#ifdef VERBOSE
printf( "Allocated %d ShadeBobs\n", nShadeBobCount );
#endif /* VERBOSE */
- Initialize( pDisplay, Win, &gc, &Image, &ncolors, aXColors );
+ Initialize( pDisplay, Win, &gc, &pImage, &ncolors, aXColors );
for( iShadeBob=0; iShadeBob<nShadeBobCount; iShadeBob++ )
InitShadeBob( &aShadeBobs[ iShadeBob ], iShadeBob % 2 );
delay = get_integer_resource( "delay", "Integer" );
- cycles = get_integer_resource( "cycles", "Integer" ) * (nDegreeCount / 3);
+ cycles = get_integer_resource( "cycles", "Integer" ) * nDegreeCount;
i = cycles;
- while (1)
+ while( 1 )
{
screenhack_handle_events( pDisplay );
if (i++ >= cycles)
{
i = 0;
- XClearWindow (pDisplay, Win);
- memset (Image.data, 0, Image.bytes_per_line * Image.height);
+ XClearWindow( pDisplay, Win );
+ memset( pImage->data, 0, pImage->bytes_per_line * pImage->height );
for( iShadeBob=0; iShadeBob<nShadeBobCount; iShadeBob++ )
ResetShadeBob( &aShadeBobs[ iShadeBob ] );
SetPalette( pDisplay, Win, sColor, &ncolors, aXColors );
for( iShadeBob=0; iShadeBob<nShadeBobCount; iShadeBob++ )
Execute( &aShadeBobs[ iShadeBob ], pDisplay, Win, &gc,
- &Image, ncolors, aXColors );
+ pImage, ncolors, aXColors );
if( delay && !(i % 4) )
usleep(delay);
}
free( anSinTable );
- free( Image.data );
- XDestroyImage( &Image );
+ free( pImage->data );
+ XDestroyImage( pImage );
+ for( iShadeBob=0; iShadeBob<nShadeBobCount; iShadeBob++ )
+ free( aShadeBobs[ iShadeBob ].anDeltaMap );
free( aShadeBobs );
}
projects / xscreensaver / blobdiff