/*------------------------------------------------------------*/
#include "filter.h"
+#include "utils_math.h"
// Lookup Tables for Trig-functions and interpolator
-// Extract image from pano in TrPtr->src
-// using parameters in prefs (ignore image parameters
-// in TrPtr)
-
+/*
+ * Extract image from pano in TrPtr->src using parameters in prefs (ignore
+ * image parameters in TrPtr)
+ */
void PV_ExtractStill( TrformStr *TrPtr )
{
- double a,b; // field of view in rad
+ /* field of view in rad */
+ double a;
+ double b;
+
double p[2];
double mt[3][3];
int mi[3][3],i,k;
- TrPtr->success = 1;
-
a = DEG_TO_RAD( TrPtr->dest->hfov ); // field of view in rad
b = DEG_TO_RAD( TrPtr->src->hfov );
- SetMatrix( DEG_TO_RAD( TrPtr->dest->pitch ),
- DEG_TO_RAD( TrPtr->dest->yaw ),
- 0.0 ,
- mt,
- 1 );
+ /* Set up the transformation matrix `mt' using Euler angles (somehow..) */
+ SetMatrix (DEG_TO_RAD (TrPtr->dest->pitch), /* alpha */
+ DEG_TO_RAD (TrPtr->dest->yaw), /* beta */
+ 0.0, /* gamma */
+ mt, /* output */
+ 1);
p[0] = (double)TrPtr->dest->width/ (2.0 * tan( a / 2.0 ) );
- p[1] = (double)TrPtr->src->width/ b;
+ p[1] = (double) TrPtr->src->width / b;
for(i=0; i<3; i++){
for(k=0; k<3; k++){
void PV_transForm( TrformStr *TrPtr, int dist_r, int dist_e, int mt[3][3])
{
- register int x, y; // Loop through destination image
+ int x_dest, y_dest; // Loop through destination image
unsigned char *dest,*src,*sry, *dst;// Source and destination image data
long cy; // rownum in destimage
int dx,dy;
- int xc; // Cartesian Coordinates of point ("target") in Destination image
- int xs, ys;
+ int x_src, y_src;
unsigned char *rgb[2] ,
cdata[16]; // Image data handed to sampler
int x_min, x_max, y_min, y_max;
int dr1, dr2, dr3;
-
+
dr1 = mt[2][0] * dist_r;
dr2 = mt[2][1] * dist_r;
dr3 = mt[2][2] * dist_r;
-
-
-
-
dest = *TrPtr->dest->data;
src = *TrPtr->src->data; // is locked
if( TrPtr->interpolator == _bilinear )
{
- for(y = y_min; y < y_max; y++, cy+=TrPtr->dest->bytesPerLine)
+ for(y_dest = y_min; y_dest < y_max; y_dest++, cy+=TrPtr->dest->bytesPerLine)
{
dst = dest + cy + 1;
- for(x = x_min; x < x_max; x++, dst+=4)
+ for(x_dest = x_min; x_dest < x_max; x_dest++, dst+=4)
{
- v[0] = mt[0][0] * x + mt[1][0] * y + dr1;
- v[1] = mt[0][1] * x + mt[1][1] * y + dr2;
- v[2] = mt[0][2] * x + mt[1][2] * y + dr3;
+ v[0] = mt[0][0] * x_dest + mt[1][0] * y_dest + dr1;
+ v[1] = mt[0][1] * x_dest + mt[1][1] * y_dest + dr2;
+ v[2] = mt[0][2] * x_dest + mt[1][2] * y_dest + dr3;
v[0] = v[0] >> 8; v[2] = v[2] >> 8;
- xs = dist_e * PV_atan2( v[0], v[2] ) / NATAN ;
-
- ys = dist_e * PV_atan2( v[1], PV_sqrt( abs(v[2]), abs(v[0]) ) ) / NATAN ;
+ x_src = dist_e * PV_atan2( v[0], v[2] ) / NATAN ;
+ y_src = dist_e * PV_atan2( v[1], utils_sqrt2 ( abs(v[2]), abs(v[0]) ) ) / NATAN ;
- dx = xs & 255; dy = ys & 255; // fraction
-
+ dx = x_src & 255; dy = y_src & 255; // fraction
- xs = (xs >> 8) + sw2;
- ys = (ys >> 8) + sh2;
+ x_src = (x_src >> 8) + sw2;
+ y_src = (y_src >> 8) + sh2;
- if( ys >= 0 && ys < miy && xs >= 0 && xs < mix ) // all interpolation pixels inside image
+ if( y_src >= 0 && y_src < miy && x_src >= 0 && x_src < mix ) // all interpolation pixels inside image
// (most pixels)
{
- sry = src + ys * BytesPerLine + xs * 4;
+ sry = src + y_src * BytesPerLine + x_src * 4;
rgb[0] = sry;
rgb[1] = sry + BytesPerLine;
}
else // edge pixels
{
- xc = xs;
+ int x_copy = x_src;
rgb[0] = cdata;
- if( ys < 0 )
+ if( y_src < 0 )
sry = src;
- else if( ys > miy )
+ else if( y_src > miy )
sry = src + miy * BytesPerLine;
else
- sry = src + ys * BytesPerLine;
+ sry = src + y_src * BytesPerLine;
- if( xs < 0 ) xs = mix;
- if( xs > mix) xs = 0;
- *(long*)rgb[0] = *(long*)(sry + xs*4);
+ if( x_src < 0 ) x_src = mix;
+ if( x_src > mix) x_src = 0;
+ *(long*)rgb[0] = *(long*)(sry + x_src*4);
- xs = xc+1;
- if( xs < 0 ) xs = mix;
- if( xs > mix) xs = 0;
- *(long*)(rgb[0]+4) = *(long*)(sry + xs*4);
+ x_src = x_copy+1;
+ if( x_src < 0 ) x_src = mix;
+ if( x_src > mix) x_src = 0;
+ *(long*)(rgb[0]+4) = *(long*)(sry + x_src*4);
rgb[1] = cdata+8;
- ys+=1;
- if( ys < 0 )
+ y_src+=1;
+ if( y_src < 0 )
sry = src;
- else if( ys > miy )
+ else if( y_src > miy )
sry = src + miy * BytesPerLine;
else
- sry = src + ys * BytesPerLine;
- xs = xc;
- if( xs < 0 ) xs = mix;
- if( xs > mix) xs = 0;
- *(long*)rgb[1] = *(long*)(sry + xs*4);
- xs = xc+1;
- if( xs < 0 ) xs = mix;
- if( xs > mix) xs = 0;
- *(long*)(rgb[1]+4) = *(long*)(sry + xs*4);
+ sry = src + y_src * BytesPerLine;
+ x_src = x_copy;
+ if( x_src < 0 ) x_src = mix;
+ if( x_src > mix) x_src = 0;
+ *(long*)rgb[1] = *(long*)(sry + x_src*4);
+ x_src = x_copy+1;
+ if( x_src < 0 ) x_src = mix;
+ if( x_src > mix) x_src = 0;
+ *(long*)(rgb[1]+4) = *(long*)(sry + x_src*4);
}
}
else if( TrPtr->interpolator == _nn )
{
- for(y = y_min; y < y_max; y++, cy+=TrPtr->dest->bytesPerLine)
+ for(y_dest = y_min; y_dest < y_max; y_dest++, cy+=TrPtr->dest->bytesPerLine)
{
dst = dest + cy;
- for(x = x_min; x < x_max; x++, dst+=4)
+ for(x_dest = x_min; x_dest < x_max; x_dest++, dst+=4)
{
- v[0] = mt[0][0] * x + mt[1][0] * y + dr1;
- v[1] = mt[0][1] * x + mt[1][1] * y + dr2;
- v[2] = mt[0][2] * x + mt[1][2] * y + dr3;
+ v[0] = mt[0][0] * x_dest + mt[1][0] * y_dest + dr1;
+ v[1] = mt[0][1] * x_dest + mt[1][1] * y_dest + dr2;
+ v[2] = mt[0][2] * x_dest + mt[1][2] * y_dest + dr3;
v[0] = v[0] >> 8; v[2] = v[2] >> 8;
- xs = dist_e * PV_atan2( v[0], v[2] ) / NATAN ;
+ x_src = dist_e * PV_atan2( v[0], v[2] ) / NATAN ;
- ys = dist_e * PV_atan2( v[1], PV_sqrt( abs(v[2]), abs(v[0]) ) ) / NATAN ;
+ y_src = dist_e * PV_atan2( v[1], utils_sqrt2( abs(v[2]), abs(v[0]) ) ) / NATAN ;
- dx = xs & 255; dy = ys & 255; // fraction
+ dx = x_src & 255; dy = y_src & 255; // fraction
- xs = (xs >> 8) + sw2;
- ys = (ys >> 8) + sh2;
+ x_src = (x_src >> 8) + sw2;
+ y_src = (y_src >> 8) + sh2;
- if( xs < 0 ) xs = 0;
- if( xs > mix ) xs = mix;
- if( ys < 0) ys = 0;
- if( ys > miy ) ys = miy;
+ if( x_src < 0 ) x_src = 0;
+ if( x_src > mix ) x_src = mix;
+ if( y_src < 0) y_src = 0;
+ if( y_src > miy ) y_src = miy;
- *(long*)dst = *(long*)(src + ys * BytesPerLine + xs * 4);
+ *(long*)dst = *(long*)(src + y_src * BytesPerLine + x_src * 4);
}
}
}
return;
}
-
+#if 0
void matrix_inv_mult( double m[3][3], double vector[3] )
{
register int i;
vector[i] = m[0][i] * v0 + m[1][i] * v1 + m[2][i] * v2;
}
}
+#endif
// Set matrix elements based on Euler angles a, b, c
mz[1][0] =-mz[0][1] ; mz[1][1] = mz[0][0] ; mz[1][2] = 0.0;
mz[2][0] = 0.0 ; mz[2][1] = 0.0 ; mz[2][2] = 1.0;
+ /* Calculate `m = mz * mx * my' */
+
if( cl )
matrix_matrix_mult( mz, mx, dummy);
else
matrix_matrix_mult( mx, mz, dummy);
matrix_matrix_mult( dummy, my, m);
-}
+} /* void SetMatrix */
void matrix_matrix_mult( double m1[3][3],double m2[3][3],double result[3][3])
{
register int i,k;
for(i=0;i<3;i++)
- {
for(k=0; k<3; k++)
- {
result[i][k] = m1[i][0] * m2[0][k] + m1[i][1] * m2[1][k] + m1[i][2] * m2[2][k];
- }
- }
-}
+} /* void matrix_matrix_mult */
}
+/*
+ * vim: set tabstop=4 softtabstop=4 shiftwidth=4 :
+ */
projects / libopano.git / blobdiff