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2 | toby | 1 | /* |
18 | toby | 2 | This file is part of "Filter Foundry", a filter plugin for Adobe Photoshop |
53 | toby | 3 | Copyright (C) 2003-6 Toby Thain, toby@telegraphics.com.au |
2 | toby | 4 | |
5 | This program is free software; you can redistribute it and/or modify |
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6 | it under the terms of the GNU General Public License as published by |
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7 | the Free Software Foundation; either version 2 of the License, or |
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8 | (at your option) any later version. |
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9 | |||
10 | This program is distributed in the hope that it will be useful, |
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11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | GNU General Public License for more details. |
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14 | |||
15 | You should have received a copy of the GNU General Public License |
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16 | along with this program; if not, write to the Free Software |
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17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 | */ |
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19 | |||
20 | #include "ff.h" |
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21 | #include "symtab.h" |
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22 | #include "node.h" |
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23 | #include "funcs.h" |
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8 | toby | 24 | #include "y.tab.h" |
2 | toby | 25 | |
26 | extern value_type var[]; |
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27 | extern int nplanes,varused[],srcradused; |
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28 | extern struct node *tree[]; |
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66 | toby | 29 | |
30 | // points to first row, first column of selection image data |
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31 | // this is used by src() and cnv() functions to access pixels |
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32 | unsigned char *image_ptr; |
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33 | |||
2 | toby | 34 | int needinput; |
35 | |||
36 | /* get prepared to evaluate expression trees-- |
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37 | this assumes that tree[] array is already set up |
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38 | return TRUE if we're ready to go |
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39 | */ |
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40 | |||
41 | Boolean setup(FilterRecordPtr pb){ |
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42 | int i; |
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43 | |||
44 | INITRANDSEED(); |
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53 | toby | 45 | var['X'] = pb->filterRect.right - pb->filterRect.left; |
46 | var['Y'] = pb->filterRect.bottom - pb->filterRect.top; |
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2 | toby | 47 | var['Z'] = nplanes; |
48 | var['D'] = 1024; |
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49 | var['M'] = ff_c2m(var['X'],var['Y'])/2; |
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50 | |||
51 | /* initialise flags for tracking special variable usage */ |
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52 | for( i=0 ; i<0x100 ; i++ ) |
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53 | varused[i] = 0; |
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54 | srcradused = 0; |
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55 | for(i=0;i<nplanes;++i){ |
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56 | //char s[100];sprintf(s,"expr[%d]=%#x",i,expr[i]);dbg(s); |
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57 | if( tree[i] || ( tree[i] = parseexpr(expr[i]) ) ) |
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58 | checkvars(tree[i],varused,&srcradused); |
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59 | else |
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60 | break; |
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61 | } |
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62 | needinput = (srcradused || varused['r'] || varused['g'] || varused['b'] || varused['a'] |
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63 | || varused['i'] || varused['u'] || varused['v'] || varused['c']) ; |
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64 | |||
65 | return i==nplanes; /* all required expressions parse OK */ |
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66 | } |
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67 | |||
68 | void evalpixel(unsigned char *outp,unsigned char *inp){ |
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69 | int f,k; |
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70 | |||
71 | if(needinput){ |
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72 | var['r'] = inp[0]; |
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73 | var['g'] = nplanes > 1 ? inp[1] : 0; |
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74 | var['b'] = nplanes > 2 ? inp[2] : 0; |
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75 | var['a'] = nplanes > 3 ? inp[3] : 0; |
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76 | |||
77 | if(varused['i']) var['i'] = (( 76L*var['r'])+(150L*var['g'])+( 29L*var['b']))/256; |
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78 | if(varused['u']) var['u'] = ((-19L*var['r'])+(-37L*var['g'])+( 56L*var['b']))/256; |
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79 | if(varused['v']) var['v'] = (( 78L*var['r'])+(-65L*var['g'])+(-13L*var['b']))/256; |
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80 | } |
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66 | toby | 81 | if(varused['d']) var['d'] = ff_c2d(var['X']/2 - var['x'], var['Y']/2 - var['y']); |
82 | if(varused['m']) var['m'] = ff_c2m(var['X']/2 - var['x'], var['Y']/2 - var['y']); |
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2 | toby | 83 | |
66 | toby | 84 | for(k = 0; k < nplanes; ++k){ |
2 | toby | 85 | if(needinput) |
86 | var['c'] = inp[k]; |
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87 | var['z'] = k; |
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88 | f = eval(tree[k]); |
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66 | toby | 89 | outp[k] = f<0 ? 0 : (f>255 ? 255 : f); // clamp channel value to 0-255 |
2 | toby | 90 | } |
91 | } |
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92 | |||
53 | toby | 93 | /* Zoom and filter image. |
66 | toby | 94 | * Parameters: pb - Photoshop Filter parameter block |
95 | * progress - whether to use Photoshop's progress bar |
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53 | toby | 96 | * (not appropriate during preview) |
66 | toby | 97 | * filterRect - rectangle (within pb->inRect) |
53 | toby | 98 | * of area to be filtered. This may not correspond |
99 | * to pb->filterRect, it may be just a piece. |
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66 | toby | 100 | * outPiece - rectangle defining scaled output buffer. |
101 | * In case of zoomed preview, this is physically |
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102 | * scaled FROM filterRect (or equal to filterRect |
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103 | * for unscaled 1:1 filtering). |
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53 | toby | 104 | * outData - pointer to output data buffer |
105 | * outRowBytes - row stride of output data buffer |
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66 | toby | 106 | * zoom - pixel scale factor (both horiz & vert) |
53 | toby | 107 | * e.g. 2.0 means 1 output pixel per 2 input pixels. |
108 | */ |
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2 | toby | 109 | |
53 | toby | 110 | OSErr process_scaled(FilterRecordPtr pb, Boolean progress, |
66 | toby | 111 | Rect *filterPiece, Rect *outPiece, |
53 | toby | 112 | void *outData, long outRowBytes, double zoom){ |
2 | toby | 113 | unsigned char *inrow,*outrow,*outp; |
23 | toby | 114 | int j,i; |
2 | toby | 115 | long t,ticks = TICKCOUNT(); |
116 | double x,y; |
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66 | toby | 117 | |
118 | /* char s[0x100];sprintf(s,"process_scaled: pb->inData=%p outData=%p\n\ |
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119 | pb->inRect=(%d,%d,%d,%d) filterPiece=(%d,%d,%d,%d) outPiece=(%d,%d,%d,%d)\n\ |
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120 | pb->fRect=(%d,%d,%d,%d)\n\ |
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121 | top row offset (from inData) = %d\n\ |
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122 | left row offset = %d\n", |
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2 | toby | 123 | pb->inData,outData, |
66 | toby | 124 | pb->inRect.left,pb->inRect.top,pb->inRect.right,pb->inRect.bottom, |
125 | filterPiece->left,filterPiece->top,filterPiece->right,filterPiece->bottom, |
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126 | outPiece->left,outPiece->top,outPiece->right,outPiece->bottom, |
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127 | pb->filterRect.left,pb->filterRect.top,pb->filterRect.right,pb->filterRect.bottom, |
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128 | filterPiece->top - pb->filterRect.top + pb->filterRect.top - pb->inRect.top, |
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129 | filterPiece->left - pb->filterRect.left + pb->filterRect.left - pb->inRect.left); dbg(s); */ |
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130 | |||
2 | toby | 131 | if(needinput && !pb->inData){ |
53 | toby | 132 | simplealert("Error (process_scaled: pb->inData == NULL)." |
133 | " This problem is being investigated. Cannot apply the filter;" |
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134 | " please re-launch Photoshop and try again."); |
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2 | toby | 135 | return userCanceledErr; |
136 | }else |
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66 | toby | 137 | // find base pointer to selection image data |
138 | image_ptr = (unsigned char*)pb->inData + (long)pb->inRowBytes*(pb->filterRect.top - pb->inRect.top) |
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139 | + (long)nplanes*(pb->filterRect.left - pb->inRect.left); |
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140 | |||
141 | // j indexes scaled output rows |
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142 | for( j = outPiece->top, outrow = (unsigned char*)outData, y = filterPiece->top - pb->filterRect.top ; |
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143 | j < outPiece->bottom ; ++j, outrow += outRowBytes, y += zoom ) |
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53 | toby | 144 | { |
66 | toby | 145 | var['y'] = y; // index of corresponding *input* row, top of selection == 0 |
2 | toby | 146 | inrow = (unsigned char*)pb->inData |
53 | toby | 147 | + ((long)y + pb->filterRect.top - pb->inRect.top)*pb->inRowBytes |
148 | + (long)nplanes*(pb->filterRect.left - pb->inRect.left); |
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66 | toby | 149 | |
150 | // i indexes scaled output columns |
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151 | for( outp = outrow, i = outPiece->left, x = filterPiece->left - pb->filterRect.left ; |
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152 | i < outPiece->right ; ++i, outp += nplanes, x += zoom ) |
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53 | toby | 153 | { |
66 | toby | 154 | var['x'] = x; // index of corresponding *input* column, left of selection == 0 |
155 | evalpixel(outp,inrow + (long)x*nplanes); /* var['x'] & var['y'] are implicit parameters */ |
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2 | toby | 156 | } |
157 | |||
66 | toby | 158 | if(progress){ |
159 | if((t = TICKCOUNT()) > ticks){ |
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160 | ticks = t + TICKS_SEC/4; |
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161 | if(pb->abortProc()) |
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162 | return userCanceledErr; |
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163 | else |
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164 | pb->progressProc((int)y - pb->filterRect.top,pb->filterRect.bottom - pb->filterRect.top); |
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165 | } |
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2 | toby | 166 | } |
167 | #ifdef MAC_ENV |
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168 | else{ |
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169 | /* to stop delays during typing of expressions, |
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170 | immediately abort preview calculation if a key or mouse has been pressed. */ |
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171 | EventRecord event; |
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172 | if(EventAvail(mDownMask|keyDownMask|autoKeyMask,&event)) |
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173 | return userCanceledErr; |
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174 | } |
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175 | #endif |
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176 | } |
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177 | |||
178 | return noErr; |
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179 | } |