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paint_ctrl.js
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paint_ctrl.js
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function __normalPaintMode( _real, _imag, _result_m, _result_p,
_offset, _r_offset,
_clr_r, _clr_i, _alpha ) {
for ( var kk=0; kk < 3; ++kk ) {
var index = _offset + kk;
_real[index] = (1.0 - _alpha) * _real[index] + _alpha * _clr_r[kk];
_imag[index] = (1.0 - _alpha) * _imag[index] + _alpha * _clr_i[kk];
_result_m[ _r_offset + kk ] = __clampPixel(_real[index],_imag[index]);
_result_p[ _r_offset + kk ] = __clampPhase(_real[index],_imag[index]);
}
}
function __addPaintMode( _real, _imag, _result_m, _result_p,
_offset, _r_offset,
_clr_r, _clr_i, _alpha ) {
for ( var kk=0; kk < 3; ++kk ) {
var index = _offset + kk;
_real[index] += _alpha * _clr_r[kk];
_imag[index] += _alpha * _clr_i[kk];
_result_m[ _r_offset + kk ] = __clampPixel(_real[index],_imag[index]);
_result_p[ _r_offset + kk ] = __clampPhase(_real[index],_imag[index]);
}
}
function __multiplyPaintMode( _real, _imag, _result_m, _result_p,
_offset, _r_offset,
_clr_r, _clr_i, _alpha ) {
for ( var kk=0; kk < 3; ++kk ) {
var index = _offset + kk;
var rr = _real[index];
var ii = _imag[index];
_real[index] = (1.0 - _alpha) * rr
+ _alpha * ( rr * _clr_r[kk] - ii * _clr_i[kk] );
_imag[index] = (1.0 - _alpha) * ii
+ _alpha * ( rr * _clr_i[kk] + ii * _clr_r[kk] );
_result_m[ _r_offset + kk ] = __clampPixel(_real[index],_imag[index]);
_result_p[ _r_offset + kk ] = __clampPhase(_real[index],_imag[index]);
}
}
var paint_hsv_r = Array( 0.0, 0.0, 1.0 );
var paint_hsv_i = Array( 0.0, 0.0, 0.0 );
var paint_color_r = Array( 1.0, 0.0, 0.0 );
var paint_color_i = Array( 0.0, 0.0, 0.0 );
var paint_opacity = 0.2;
var paint_mode = __normalPaintMode;
var paint_brush = false;
function selectPaintMode( _mode ) {
if ( _mode == 'normal' ) {
paint_mode = __normalPaintMode;
}
else if ( _mode == 'add' ) {
paint_mode = __addPaintMode
}
else if ( _mode == 'multiply' ) {
paint_mode = __multiplyPaintMode
}
else {
return false;
}
return true;
}
function updatePaintColor( _hsv, _rgb, _patchId ) {
var hh = _hsv[0];
var ss = _hsv[1];
var vv = _hsv[2];
while ( hh < 0 ) {
hh += 360;
}
var hi = Math.floor( hh / 60 ) % 6;
var ff = hh / 60.0 - Math.floor( hh / 60 );
var pp = vv * ( 1.0 - ss );
var qq = vv * ( 1.0 - ff * ss );
var tt = vv * ( 1.0 - (1.0 - ff) * ss);
switch (hi) {
case 0: _rgb[0] = vv; _rgb[1] = tt; _rgb[2] = pp; break;
case 1: _rgb[0] = qq; _rgb[1] = vv; _rgb[2] = pp; break;
case 2: _rgb[0] = pp; _rgb[1] = vv; _rgb[2] = tt; break;
case 3: _rgb[0] = pp; _rgb[1] = qq; _rgb[2] = vv; break;
case 4: _rgb[0] = tt; _rgb[1] = pp; _rgb[2] = vv; break;
case 5: _rgb[0] = vv; _rgb[1] = pp; _rgb[2] = qq; break;
}
var rr = __clampPixel( _rgb[0], 0.0 );
var gg = __clampPixel( _rgb[1], 0.0 );
var bb = __clampPixel( _rgb[2], 0.0 );
var patch = document.getElementById( _patchId );
if ( !patch ) {
return false;
}
var context = patch.getContext('2d');
if ( ! context ) {
return false;
}
context.fillStyle = 'rgb(' + rr + ',' + gg + ',' + bb + ')';
context.fillRect( 0, 0, patch.width, patch.height );
return true;
}
function selectHueAndSaturation( _ctrl, _real, _event ) {
var rect = __getBoundingClientRect( _ctrl );
var xx = Math.round(_event.clientX - rect.left - _ctrl.width/2);
var yy = Math.round(_event.clientY - rect.top - _ctrl.height/2);
var hh = Math.round( 180.0 * Math.atan2( yy, xx ) / pi );
var rr = Math.sqrt( xx*xx + yy*yy ) / (_ctrl.width/2);
var ss = Math.min( rr, 1.0 );
if ( _real ) {
paint_hsv_r[ 0 ] = hh;
paint_hsv_r[ 1 ] = ss;
updatePaintColor( paint_hsv_r, paint_color_r, 'real_color' );
}
else {
paint_hsv_i[ 0 ] = hh;
paint_hsv_i[ 1 ] = ss;
updatePaintColor( paint_hsv_i, paint_color_i, 'imag_color' );
}
return true;
}
function selectLuminance( _ctrl, _real ) {
var ll = eval( _ctrl.value ) + 0.0;
_ctrl.value = ll;
if ( _real ) {
paint_hsv_r[ 2 ] = ll;
updatePaintColor( paint_hsv_r, paint_color_r, 'real_color' );
}
else {
paint_hsv_i[ 2 ] = ll;
updatePaintColor( paint_hsv_i, paint_color_i, 'imag_color' );
}
return true;
}
function selectOpacity( _ctrl ) {
var oo = eval( _ctrl.value ) + 0.0;
_ctrl.value = oo;
paint_opacity = oo;
return true;
}
function setPaintBrush( _img ) {
var brush = document.getElementById( 'paint_brush' );
if ( !_img || !brush ) {
return false;
}
var context = brush.getContext( '2d' );
if ( !context ) {
return false;
}
var ww = _img.naturalWidth;
var hh = _img.naturalHeight;
if ( ww < 1 || hh < 1 ) {
return false;
}
if ( ww > brush.width || hh > brush.height ) {
var aspect = 1.0 * ww / hh;
if ( aspect * brush.height <= brush.width ) {
ww = aspect * brush.height;
hh = brush.height;
}
else {
ww = brush.width;
hh = brush.width / aspect;
}
}
var ox = Math.round( (brush.width - ww)/2 );
var oy = Math.round( (brush.height - hh)/2 );
context.fillStyle = '#fff';
context.fillRect( 0, 0, brush.width, brush.height );
context.drawImage( _img, ox, oy, ww, hh );
var rawData = context.getImageData( ox, oy, ww, hh );
var pix = rawData.data;
paint_brush = new Array();
for ( var jj=0; jj < hh; ++jj ) {
var row = new Array();
for ( var ii=0; ii < ww; ++ii ) {
var index = ( jj * ww + ii ) * 4;
var rr = 1.0 - pix[ index + 0 ] / 255.0;
var gg = 1.0 - pix[ index + 1 ] / 255.0;
var bb = 1.0 - pix[ index + 2 ] / 255.0;
row[ii] = 0.30 * rr + 0.59 * gg + 0.11 * bb;
}
paint_brush[jj] = row;
}
return true;
}
var transform_checkboxes = new Array(
'mirror_x',
'mirror_y',
'mirror_d1',
'mirror_d2',
'mirror_r'
);
var known_transforms = {
'identity': new Array( new Array( 1, 0 ), new Array( 0, 1 ) ),
'mirror_x': new Array( new Array( -1, 0 ), new Array( 0, 1 ) ),
'mirror_y': new Array( new Array( 1, 0 ), new Array( 0, -1 ) ),
'mirror_d1': new Array( new Array( 0, 1 ), new Array( 1, 0 ) ),
'mirror_d2': new Array( new Array( 0, -1 ), new Array( -1, 0 ) ),
'mirror_r': new Array( new Array( -1, 0 ), new Array( 0, -1 ) ),
};
var transforms = new Array( known_transforms['identity'] );
function __transformedX( _transform, _xx, _yy ) {
return _transform[0][0] * _xx + _transform[0][1] * _yy;
}
function __transformedY( _transform, _xx, _yy ) {
return _transform[1][0] * _xx + _transform[1][1] * _yy;
}
function __multiplyTransforms( _aa, _bb ) {
var row1 = new Array( _aa[0][0] * _bb[0][0] + _aa[0][1] * _bb[1][0],
_aa[0][0] * _bb[0][1] + _aa[0][1] * _bb[1][1] );
var row2 = new Array( _aa[1][0] * _bb[0][0] + _aa[1][1] * _bb[1][0],
_aa[1][0] * _bb[0][1] + _aa[1][1] * _bb[1][1] );
return new Array( row1, row2 );
}
function __sameTransform( _aa, _bb ) {
var delta = Math.abs( _aa[0][0] - _bb[0][0] )
+ Math.abs( _aa[0][1] - _bb[0][1] )
+ Math.abs( _aa[1][0] - _bb[1][0] )
+ Math.abs( _aa[1][1] - _bb[1][1] )
;
return delta < 0.00001;
}
function __addTransform( _aa ) {
for ( var ii=0; ii < transforms.length; ++ii ) {
if ( __sameTransform( _aa, transforms[ii] ) ) {
return false;
}
}
transforms[ transforms.length ] = _aa;
for ( var ii=0; ii < transforms.length; ++ii ) {
var cc = __multiplyTransforms( _aa, transforms[ii] );
__addTransform( cc );
}
return true;
}
function reloadTransforms() {
transforms = new Array( known_transforms['identity'] );
for ( var ii=0; ii < transform_checkboxes.length; ++ii ) {
var name = transform_checkboxes[ii];
var checkbox = document.getElementById( name );
if ( !checkbox ) {
return false;
}
if ( checkbox.checked ) {
__addTransform( known_transforms[ name ] );
}
}
return true;
}
function __paintAtPoint( _canvas_m, _canvas_p, _context_m, _context_p,
_mx_orig, _my_orig, _transform )
{
//
// transform the brush location based on the symmetry transform
//
var _mx2_orig = _mx_orig - _canvas_m.width/2;
var _my2_orig = _my_orig - _canvas_m.height/2;
var mx = __transformedX( _transform, _mx2_orig, _my2_orig )
+ canvas_m.width/2;
var my = __transformedY( _transform, _mx2_orig, _my2_orig )
+ canvas_m.height/2;
var bw_orig = paint_brush[0].length;
var bh_orig = paint_brush.length;
var bw = Math.abs( __transformedX( _transform, bw_orig, bh_orig ) );
var bh = Math.abs( __transformedY( _transform, bw_orig, bh_orig ) );
var bound_xx = Math.max(mx - Math.round(bw/2), 0);
var bound_ww = Math.min(mx + Math.round(bw/2), canvas_m.width) - bound_xx;
var bound_yy = Math.max(my - Math.round(bh/2), 0);
var bound_hh = Math.min(my + Math.round(bh/2),canvas_m.height) - bound_yy;
if ( bound_ww < 1 || bound_hh < 1 ) {
return false;
}
var raw_m = _context_m.getImageData(bound_xx,bound_yy,bound_ww,bound_hh);
var result_m = raw_m.data;
var raw_p = _context_p.getImageData(bound_xx,bound_yy,bound_ww,bound_hh);
var result_p = raw_p.data;
var real = fftData.real;
var imag = fftData.imag;
for ( var bj = 0, r_index = 0; bj < bh; ++bj ) {
var bj_orig = bj - (bh-1)/2;
var yy = my + Math.round(bj_orig - 0.5);
if ( 0 <= yy && yy < canvas_m.height ) {
for ( var bi = 0; bi < bw; ++bi ) {
var bi_orig = bi - (bw-1)/2;
var xx = mx + Math.round(bi_orig - 0.5);
if ( 0 <= xx && xx < canvas_m.width ) {
var bit = Math.round(
__transformedX( _transform, bi_orig, bj_orig )
+ (bw-1)/2
);
var bjt = Math.round(
__transformedY( _transform, bi_orig, bj_orig )
+ (bh-1)/2
);
var index = ( yy * canvas_m.width + xx ) * 4;
paint_mode( real, imag, result_m, result_p,
index, r_index,
paint_color_r, paint_color_i,
paint_opacity * paint_brush[bjt][bit] );
r_index += 4;
}
}
}
}
_context_m.putImageData( raw_m, bound_xx, bound_yy );
_context_p.putImageData( raw_p, bound_xx, bound_yy );
return true;
}
function paintAtMouse( _event ) {
var canvas_m = document.getElementById( 'canvas_m' );
var canvas_p = document.getElementById( 'canvas_p' );
if ( !canvas_m || !canvas_p ) {
return false;
}
if ( !fftData ) {
fftData = __createFFTDataFromCanvas( canvas_m.id, canvas_p.id );
if ( !fftData ) {
return false;
}
}
var context_m = canvas_m.getContext('2d');
var context_p = canvas_p.getContext('2d');
if ( !context_m || !context_p ) {
return false;
}
var canvas = _event.target;
var rect = __getBoundingClientRect( canvas );
var mx = Math.round(_event.clientX - rect.left);
var my = Math.round(_event.clientY - rect.top);
for ( var ii=0; ii < transforms.length; ++ii ) {
__paintAtPoint( canvas_m, canvas_p, context_m, context_p,
mx, my, transforms[ii] );
}
return true;
}
//
// set up paint-mode event handlers
//
modes.paint_controls = {
handleMouseDown: paintAtMouse,
handleMouseDrag: paintAtMouse,
};