1,956
edits
Code:isochromic.c: Difference between revisions
Started version 0.6. Changed the "preserve sums" syntax to '$' (it used to be '_').
(Added note about how I'm planning to change the syntax for "preserve sum" (i want it to be '$' instead of '_')) |
(Started version 0.6. Changed the "preserve sums" syntax to '$' (it used to be '_').) |
||
| Line 1: | Line 1: | ||
// Elie's isochromic image generator v0.6 | |||
// Elie's isochromic image generator v0. | |||
// Copyright 2022, Elie Goldman Smith | // Copyright 2022, Elie Goldman Smith | ||
// License: GNU GPL V3 | // License: GNU GPL V3 | ||
| Line 64: | Line 63: | ||
puts(" "); | puts(" "); | ||
puts("Commands - quick reference:"); | puts("Commands - quick reference:"); | ||
puts(" foo << input.png # Load data from file"); | puts(" foo << input.png # Load data from file (can create new variable 'foo')"); | ||
puts(" bar := foo # Copy data"); | puts(" bar := foo # Copy data (can create new variable 'bar')"); | ||
puts(" bar += foo # Addition"); | puts(" bar += foo # Addition"); | ||
puts(" bar -= foo # Subtraction"); | puts(" bar -= foo # Subtraction"); | ||
| Line 75: | Line 74: | ||
puts(" bar _= foo # Fill in any blanks"); | puts(" bar _= foo # Fill in any blanks"); | ||
puts(" bar [] foo # Array lookup"); | puts(" bar [] foo # Array lookup"); | ||
puts(" bar :: foo # Resize image"); | puts(" bar :: foo # Resize image (or create new blank variable 'bar')"); | ||
puts(" bar >> output.png # Save data to file"); | puts(" bar >> output.png # Save data to file"); | ||
puts(" -- "); | puts(" -- "); | ||
| Line 83: | Line 82: | ||
puts(" -- # Special functions:"); | puts(" -- # Special functions:"); | ||
puts(" foo @@ spread # Smooth out the overflows"); | puts(" foo @@ spread # Smooth out the overflows"); | ||
puts(" foo @@ stats # Quick statistical info"); | puts(" foo @@ stats # Quick statistical info"); | ||
puts(" foo @@ clear # Delete 'foo', free up memory"); | puts(" foo @@ clear # Delete 'foo', free up memory"); | ||
} | } | ||
| Line 514: | Line 513: | ||
| Line 575: | Line 574: | ||
return result; // done loading headerless data | return result; // done loading headerless data | ||
} | } | ||
// other case: image file: | // other case: image file: | ||
printf("Loading image file"); fflush(stdout); | printf("Loading image file"); fflush(stdout); | ||
| Line 713: | Line 712: | ||
// operator [] (array mapping) | // operator [] (array mapping) | ||
if (c0=='[' && c1==']') { | if (c0=='[' && c1==']') { | ||
| Line 757: | Line 756: | ||
int newWidth=0, newHeight=0, preserveSum=0; | int newWidth=0, newHeight=0, preserveSum=0; | ||
char *rightx = right; | char *rightx = right; | ||
if (right[0]==' | if (right[0]=='$') { // the '$' preserves pixel sums. Note that the syntax was previously '_' instead, in version 0.5 | ||
rightx++; | rightx++; | ||
preserveSum=1; | preserveSum=1; | ||
| Line 790: | Line 788: | ||
} | } | ||
printf("Resizing '%s'(%dx%d) to ", left, lv->width, lv->height); | printf("Resizing '%s'(%dx%d) to ", left, lv->width, lv->height); | ||
if (rv) printf("fit '%s'", | if (rv) printf("fit '%s'", rightx); | ||
printf("(%dx%d) - note: may be slow\n", newWidth, newHeight); | printf("(%dx%d) - note: may be slow\n", newWidth, newHeight); | ||
if (preserveSum) printf(" + preserving the sum of pixels\n"); | if (preserveSum) printf(" + preserving the sum of pixels\n"); | ||
| Line 811: | Line 809: | ||
Var *lv[4] = {0}; | Var *lv[4] = {0}; | ||
lv[0] = find_var(left); | lv[0] = find_var(left); | ||
if (lv[0]) n=1; | if (lv[0] && lv[0]->width && lv[0]->height) n = 1; | ||
else { | else { | ||
// try multiple channels - for variable 'foo', look for 'foo.r', 'foo.g', 'foo.b', 'foo.a' | // try multiple channels - for variable 'foo', look for 'foo.r', 'foo.g', 'foo.b', 'foo.a' | ||
| Line 854: | Line 852: | ||
} | } | ||
if (highs || lows) { | if (highs || lows) { | ||
printf(" '%s' contains overflows (%d pixels are >1) (%d pixels are <0)\n", lv[i]->name, highs, lows); | printf(" Note: '%s' contains overflows(%d pixels are >1)(%d pixels are <0)\n", lv[i]->name, highs, lows); | ||
printf(" Image will not be isochromic.\n If you want it to be, you need to first do:\n"); | printf(" Image will not be isochromic.\n If you want it to be, you need to first do:\n"); | ||
printf(" %s @@ spread\n (which would alter the contents of '%s').\n", lv[i]->name, lv[i]->name); | printf(" %s @@ spread\n (which would alter the contents of '%s').\n", lv[i]->name, lv[i]->name); | ||
| Line 930: | Line 928: | ||
if (!strncasecmp(right,"width",5) || !strncasecmp(right," | if (!strncasecmp(right,"width",5) || !strncasecmp(right,"$width",6)) { | ||
if (lv->width<=0 || lv->height<=0) { | if (lv->width<=0 || lv->height<=0) { | ||
printf("Can't scale an empty variable\n"); | printf("Can't scale an empty variable\n"); | ||
| Line 957: | Line 955: | ||
lv->width *= scale; | lv->width *= scale; | ||
} | } | ||
if (right[0]==' | if (right[0]=='$') printf(" + preserving the sum of pixels\n"); | ||
if((right[0]==' | if((right[0]=='$') != (*p=='/')) for (int i=0; i < lv->width*lv->height; i++) lv->data[i] /= scale; | ||
return RESULT_OK; | return RESULT_OK; | ||
} | } | ||
if (!strncasecmp(right,"height",6) || !strncasecmp(right," | if (!strncasecmp(right,"height",6) || !strncasecmp(right,"$height",7)) { | ||
if (lv->width<=0 || lv->height<=0) { | if (lv->width<=0 || lv->height<=0) { | ||
printf("Can't scale an empty variable\n"); | printf("Can't scale an empty variable\n"); | ||
| Line 990: | Line 988: | ||
lv->height *= scale; | lv->height *= scale; | ||
} | } | ||
if (right[0]==' | if (right[0]=='$') printf(" + preserving the sum of pixels\n"); | ||
if((right[0]==' | if((right[0]=='$') != (*p=='/')) for (int i=0; i < lv->width*lv->height; i++) lv->data[i] /= scale; | ||
return RESULT_OK; | return RESULT_OK; | ||
} | } | ||
| Line 1,106: | Line 1,104: | ||
return 0; | return 0; | ||
} | } | ||