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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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29 | int needinput; |
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30 | |||
31 | /* get prepared to evaluate expression trees-- |
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32 | this assumes that tree[] array is already set up |
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33 | return TRUE if we're ready to go |
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34 | */ |
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35 | |||
36 | Boolean setup(FilterRecordPtr pb){ |
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37 | int i; |
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38 | |||
39 | INITRANDSEED(); |
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53 | toby | 40 | var['X'] = pb->filterRect.right - pb->filterRect.left; |
41 | var['Y'] = pb->filterRect.bottom - pb->filterRect.top; |
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2 | toby | 42 | var['Z'] = nplanes; |
43 | var['D'] = 1024; |
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44 | var['M'] = ff_c2m(var['X'],var['Y'])/2; |
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45 | |||
46 | /* initialise flags for tracking special variable usage */ |
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47 | for( i=0 ; i<0x100 ; i++ ) |
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48 | varused[i] = 0; |
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49 | srcradused = 0; |
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50 | for(i=0;i<nplanes;++i){ |
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51 | //char s[100];sprintf(s,"expr[%d]=%#x",i,expr[i]);dbg(s); |
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52 | if( tree[i] || ( tree[i] = parseexpr(expr[i]) ) ) |
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53 | checkvars(tree[i],varused,&srcradused); |
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54 | else |
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55 | break; |
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56 | } |
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57 | needinput = (srcradused || varused['r'] || varused['g'] || varused['b'] || varused['a'] |
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58 | || varused['i'] || varused['u'] || varused['v'] || varused['c']) ; |
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59 | |||
60 | return i==nplanes; /* all required expressions parse OK */ |
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61 | } |
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62 | |||
63 | void evalpixel(unsigned char *outp,unsigned char *inp){ |
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64 | int f,k; |
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65 | |||
66 | if(needinput){ |
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67 | var['r'] = inp[0]; |
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68 | var['g'] = nplanes > 1 ? inp[1] : 0; |
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69 | var['b'] = nplanes > 2 ? inp[2] : 0; |
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70 | var['a'] = nplanes > 3 ? inp[3] : 0; |
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71 | |||
72 | if(varused['i']) var['i'] = (( 76L*var['r'])+(150L*var['g'])+( 29L*var['b']))/256; |
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73 | if(varused['u']) var['u'] = ((-19L*var['r'])+(-37L*var['g'])+( 56L*var['b']))/256; |
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74 | if(varused['v']) var['v'] = (( 78L*var['r'])+(-65L*var['g'])+(-13L*var['b']))/256; |
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75 | } |
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76 | if(varused['d']) var['d'] = ff_c2d(var['X']/2-var['x'],var['Y']/2-var['y']); |
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77 | if(varused['m']) var['m'] = ff_c2m(var['X']/2-var['x'],var['Y']/2-var['y']); |
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78 | |||
79 | for( k=0 ; k<nplanes ; ++k ){ |
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80 | if(needinput) |
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81 | var['c'] = inp[k]; |
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82 | var['z'] = k; |
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83 | f = eval(tree[k]); |
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84 | outp[k] = f<0 ? 0 : ( f>255 ? 255 : f ); // clamp channel value to 0-255 |
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85 | } |
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86 | } |
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87 | |||
53 | toby | 88 | /* Zoom and filter image. |
89 | * Parameters: pb - Photoshop parameter block |
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90 | * progress - whether to call Photoshop's progress bar |
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91 | * (not appropriate during preview) |
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92 | * filterRect - rectangle (contained within pb->inRect) |
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93 | * of area to be filtered. This may not correspond |
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94 | * to pb->filterRect, it may be just a piece. |
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95 | * outRect - rectangle defining scaled output buffer, |
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96 | * physically scaled FROM filterRect |
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97 | * (= filterRect for unscaled 1:1 filtering). |
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98 | * outData - pointer to output data buffer |
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99 | * outRowBytes - row stride of output data buffer |
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100 | * zoom - pixel scale factor (horiz & vert) |
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101 | * e.g. 2.0 means 1 output pixel per 2 input pixels. |
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102 | */ |
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2 | toby | 103 | |
53 | toby | 104 | OSErr process_scaled(FilterRecordPtr pb, Boolean progress, |
105 | Rect *filterRect, Rect *outRect, |
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106 | void *outData, long outRowBytes, double zoom){ |
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2 | toby | 107 | unsigned char *inrow,*outrow,*outp; |
23 | toby | 108 | int j,i; |
2 | toby | 109 | long t,ticks = TICKCOUNT(); |
110 | double x,y; |
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111 | /* |
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112 | {char s[0x100];sprintf(s,"process_scaled: pb->inData=%#x outData=%#x\n\ |
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113 | inRect=(%d,%d,%d,%d) filterRect=(%d,%d,%d,%d) outRect=(%d,%d,%d,%d)\n\ |
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114 | pb->filterRect=(%d,%d,%d,%d)\n", |
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115 | pb->inData,outData, |
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53 | toby | 116 | pb->inRect->left,pb->inRect->top,pb->inRect->right,pb->inRect->bottom, |
2 | toby | 117 | filterRect->left,filterRect->top,filterRect->right,filterRect->bottom, |
118 | outRect->left,outRect->top,outRect->right,outRect->bottom, |
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119 | pb->filterRect.left,pb->filterRect.top,pb->filterRect.right,pb->filterRect.bottom); dbg(s);} |
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120 | */ |
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121 | if(needinput && !pb->inData){ |
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53 | toby | 122 | simplealert("Error (process_scaled: pb->inData == NULL)." |
123 | " This problem is being investigated. Cannot apply the filter;" |
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124 | " please re-launch Photoshop and try again."); |
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2 | toby | 125 | return userCanceledErr; |
126 | }else |
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53 | toby | 127 | for( j = outRect->top, outrow = (unsigned char*)outData, y = filterRect->top - pb->filterRect.top ; |
128 | j < outRect->bottom ; ++j, outrow += outRowBytes, y += zoom ) |
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129 | { |
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130 | var['y'] = y; // counts *input* columns across selection (pb->filterRect) |
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2 | toby | 131 | inrow = (unsigned char*)pb->inData |
53 | toby | 132 | + ((long)y + pb->filterRect.top - pb->inRect.top)*pb->inRowBytes |
133 | + (long)nplanes*(pb->filterRect.left - pb->inRect.left); |
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2 | toby | 134 | |
53 | toby | 135 | for( outp = outrow, i = outRect->left, x = filterRect->left - pb->filterRect.left ; |
136 | i < outRect->right ; ++i, outp += nplanes, x += zoom ) |
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137 | { |
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138 | var['x'] = x; // counts *input* rows across selection (pb->filterRect) |
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2 | toby | 139 | evalpixel(outp,inrow + (long)var['x']*nplanes); /* var['x'] & var['y'] are implicit parameters */ |
140 | } |
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141 | |||
142 | if(progress && (t = TICKCOUNT()) > ticks){ |
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143 | ticks = t + TICKS_SEC/4; |
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144 | if(pb->abortProc()) |
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145 | return userCanceledErr; |
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146 | else |
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147 | pb->progressProc((int)y - pb->filterRect.top,pb->filterRect.bottom - pb->filterRect.top); |
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148 | } |
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149 | #ifdef MAC_ENV |
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150 | else{ |
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151 | /* to stop delays during typing of expressions, |
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152 | immediately abort preview calculation if a key or mouse has been pressed. */ |
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153 | EventRecord event; |
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154 | if(EventAvail(mDownMask|keyDownMask|autoKeyMask,&event)) |
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155 | return userCanceledErr; |
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156 | } |
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157 | #endif |
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158 | } |
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159 | |||
160 | return noErr; |
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161 | } |