bash - Custom emboss using MagickWand C API -
i want achieve emboss effect using imagemagick's c api. script this page. have achieved emboss method 1 option i'm looking convert method 2. please @ options in bash script.
when debug above script method 2 i've got this.
convert -quiet binaryimage.gif +repage ./emboss_1_18210.mpc convert '(' ./emboss_1_18210.mpc -colorspace gray ')' '(' -clone 0 -negate ')' '(' -clone 0 -distort srt '0,0 1 0 -2.12132,-2.12132' ')' '(' -clone 1 -distort srt '0,0 1 0 2.12132,2.12132' ')' -delete 0,1 -define compose:args=50 -compose blend -composite -level 100% ./emboss_2_18210.mpc convert ./emboss_2_18210.mpc binaryimagecm2.gif below id c program, it's not done yet.
#include <stdio.h> #include <magickwand/magickwand.h> #include <math.h> #define pi 3.14159265 double *arguments(double r[],int i){ double azimuth = 135; int depth = 6; r[0] = 0; r[1] = 0; r[2] = 1; r[3] = 0; if(i==1){ r[4] = cos(0.78539816339) * depth/2; r[5] = sin(0.78539816339) * depth/2; }else{ r[4] = -cos(0.78539816339) * depth/2; r[5] = -sin(0.78539816339) * depth/2; } return(r); } int emboss(){ double r[6]; magickwand *wand = null; wand = newmagickwand(); magickreadimage(wand,"binaryimage.gif"); int test = magicksetimagecolorspace(wand, 3); printf("%d\n", test); magickdistortimage(wand, scalerotatetranslatedistortion ,6, arguments(r,0) ,1); magickdistortimage(wand, scalerotatetranslatedistortion ,6, arguments(r,1) ,1); magicknegateimage(wand,1); magickcompositeimage(wand, wand, blendcompositeop, 1, 0, 0); magickwriteimages(wand,"binaryimage_c_emboss.gif",magicktrue); wand=destroymagickwand(wand); magickwandterminus(); return 1; } int main(int argc, char **argv) { emboss(); }
this bit tricky, because need transform colorspace define compose-argument property. note bestfit should set false on distortions.
here's cli & c equivalent.
cli
convert \( wizard: -colorspace gray \) \ \( -clone 0 -negate \) \ \( -clone 0 -distort srt '0,0 1 0 -2.12132,-2.12132' \) \ \( -clone 1 -distort srt '0,0 1 0 2.12132, 2.12132' \) \ -delete 0,1 \ -define compose:args=50 \ -compose blend -composite \ -level 100% output.png c
#include <wand/magickwand.h> // or <magickwand/magickwand.h> if using im 7 #define distort_arg_count 6 double distort_ags[distort_arg_count] = { 0.0f, 0.0f, 1.0f, 0.0f, -2.12132, -2.12132, }; int main(int argc, const char * argv[]) { magickwandgenesis(); magickwand * wand0, * wand1, * wand2, * wand3; wand0 = newmagickwand(); // '(' wizard: -colorspace gray ')' magickreadimage(wand0, "wizard:"); magicktransformimagecolorspace(wand0, graycolorspace); // '(' -clone 0 -negate ')' wand1 = clonemagickwand(wand0); magicknegateimage(wand1, magickfalse); // '(' -clone 0 -distort srt '0,0 1 0 -2.12132,-2.12132' ')' wand2 = clonemagickwand(wand0); magickdistortimage(wand2, scalerotatetranslatedistortion, distort_arg_count, distort_ags, magickfalse); // '(' -clone 1 -distort srt '0,0 1 0 2.12132,2.12132' ')' wand3 = clonemagickwand(wand1); distort_ags[4] *= -1; distort_ags[5] *= -1; magickdistortimage(wand3, scalerotatetranslatedistortion, distort_arg_count, distort_ags, magickfalse); // -delete 0,1 wand0 = destroymagickwand(wand0); wand1 = destroymagickwand(wand1); // -define compose:args=50 magicksetimageartifact(wand3, "compose:args", "50"); // might set on wand2 // -compose blend -composite // if using imagemagick 7, define `clip_to_self'. // magickcompositeimage(wand2, wand3, blendcompositeop, magicktrue, 0, 0); magickcompositeimage(wand2, wand3, blendcompositeop, 0, 0); // -level 100% magicklevelimage(wand2, quantumrange, 1.0, 0); // output.png magickwriteimage(wand2, "output.png"); wand2 = destroymagickwand(wand2); wand3 = destroymagickwand(wand3); magickwandterminus(); return 0; } 
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