// // Test for the CMYK color separation code for libcupsfilters. // // Copyright 2007-2011 by Apple Inc. // Copyright 1993-2006 by Easy Software Products, All Rights Reserved. // // Licensed under Apache License v2.0. See the file "LICENSE" for more // information. // // Contents: // // test_gray() - Test grayscale separations... // test_rgb() - Test color separations... // main() - Do color separation tests. // // // Include necessary headers. // #include #include #include #include "driver.h" #include cf_logfunc_t logfunc = cfCUPSLogFunc; // Log function void *ld = NULL; // Log function data void test_gray(int num_comps, const char *basename); void test_rgb(int num_comps, const char *basename); // // 'main()' - Do color separation tests. // int // O - Exit status main(int argc, // I - Number of command-line arguments char *argv[]) // I - Command-line arguments { // // Make the test directory... // mkdir("test", 0755); // // Run tests for K, Kk, CMY, CMYK, CcMmYK, and CcMmYKk separations... // test_rgb(1, "test/K-rgb"); test_rgb(2, "test/Kk-rgb"); test_rgb(3, "test/CMY-rgb"); test_rgb(4, "test/CMYK-rgb"); test_rgb(6, "test/CcMmYK-rgb"); test_rgb(7, "test/CcMmYKk-rgb"); test_gray(1, "test/K-gray"); test_gray(2, "test/Kk-gray"); test_gray(3, "test/CMY-gray"); test_gray(4, "test/CMYK-gray"); test_gray(6, "test/CcMmYK-gray"); test_gray(7, "test/CcMmYKk-gray"); // // Return with no errors... // return (0); } // // 'test_gray()' - Test grayscale separations... // void test_gray(int num_comps, // I - Number of components const char *basename) // I - Base filename of output { int i; // Looping var char filename[255]; // Output filename char line[255]; // Line from PGM file int width, height; // Width and height of test image int x, y; // Current coordinate in image int r, g, b; // Current RGB color unsigned char input[7000]; // Line to separate short output[48000], // Output separation data *outptr; // Pointer in output FILE *in; // Input PPM file FILE *out[CF_MAX_CHAN]; // Output PGM files FILE *comp; // Composite output cf_cmyk_t *cmyk; // Color separation // // Open the test image... // in = fopen("image.pgm", "rb"); while (fgets(line, sizeof(line), in) != NULL) if (isdigit(line[0])) break; sscanf(line, "%d%d", &width, &height); if (fgets(line, sizeof(line), in)); // Ignore return value of fgets() // // Create the color separation... // cmyk = cfCMYKNew(num_comps); switch (num_comps) { case 2 : // Kk cfCMYKSetLtDk(cmyk, 0, 0.5, 1.0, logfunc, ld); break; case 4 : cfCMYKSetGamma(cmyk, 2, 1.0, 0.9, logfunc, ld); cfCMYKSetBlack(cmyk, 0.5, 1.0, logfunc, ld); break; case 6 : // CcMmYK cfCMYKSetLtDk(cmyk, 0, 0.5, 1.0, logfunc, ld); cfCMYKSetLtDk(cmyk, 2, 0.5, 1.0, logfunc, ld); cfCMYKSetGamma(cmyk, 4, 1.0, 0.9, logfunc, ld); cfCMYKSetBlack(cmyk, 0.5, 1.0, logfunc, ld); break; case 7 : // CcMmYKk cfCMYKSetLtDk(cmyk, 0, 0.5, 1.0, logfunc, ld); cfCMYKSetLtDk(cmyk, 2, 0.5, 1.0, logfunc, ld); cfCMYKSetGamma(cmyk, 4, 1.0, 0.9, logfunc, ld); cfCMYKSetLtDk(cmyk, 5, 0.5, 1.0, logfunc, ld); break; } // // Open the color separation files... // for (i = 0; i < num_comps; i ++) { sprintf(filename, "%s%d.pgm", basename, i); out[i] = fopen(filename, "wb"); fprintf(out[i], "P5\n%d %d 255\n", width, height); } sprintf(filename, "%s.ppm", basename); comp = fopen(filename, "wb"); fprintf(comp, "P6\n%d %d 255\n", width, height); // // Read the image and do the separations... // for (y = 0; y < height; y ++) { if (fread(input, width, 1, in)); // Ignore return value of fread() cfCMYKDoGray(cmyk, input, output, width); for (x = 0, outptr = output; x < width; x ++, outptr += num_comps) { for (i = 0; i < num_comps; i ++) putc(255 - 255 * outptr[i] / 4095, out[i]); r = 4095; g = 4095; b = 4095; switch (num_comps) { case 1 : r -= outptr[0]; g -= outptr[0]; b -= outptr[0]; break; case 2 : r -= outptr[0]; g -= outptr[0]; b -= outptr[0]; r -= outptr[1] / 2; g -= outptr[1] / 2; b -= outptr[1] / 2; break; case 3 : r -= outptr[0]; g -= outptr[1]; b -= outptr[2]; break; case 4 : r -= outptr[0]; g -= outptr[1]; b -= outptr[2]; r -= outptr[3]; g -= outptr[3]; b -= outptr[3]; break; case 6 : r -= outptr[0] + outptr[1] / 2; g -= outptr[2] + outptr[3] / 3; b -= outptr[4]; r -= outptr[5]; g -= outptr[5]; b -= outptr[5]; break; case 7 : r -= outptr[0] + outptr[1] / 2; g -= outptr[2] + outptr[3] / 3; b -= outptr[4]; r -= outptr[5] + outptr[6] / 2; g -= outptr[5] + outptr[6] / 2; b -= outptr[5] + outptr[6] / 2; break; } if (r < 0) putc(0, comp); else putc(255 * r / 4095, comp); if (g < 0) putc(0, comp); else putc(255 * g / 4095, comp); if (b < 0) putc(0, comp); else putc(255 * b / 4095, comp); } } for (i = 0; i < num_comps; i ++) fclose(out[i]); fclose(comp); fclose(in); cfCMYKDelete(cmyk); } // // 'test_rgb()' - Test color separations... // void test_rgb(int num_comps, // I - Number of components const char *basename) // I - Base filename of output { int i; // Looping var char filename[255]; // Output filename char line[255]; // Line from PPM file int width, height; // Width and height of test image int x, y; // Current coordinate in image int r, g, b; // Current RGB color unsigned char input[7000]; // Line to separate short output[48000], // Output separation data *outptr; // Pointer in output FILE *in; // Input PPM file FILE *out[CF_MAX_CHAN]; // Output PGM files FILE *comp; // Composite output cf_cmyk_t *cmyk; // Color separation // // Open the test image... // in = fopen("image.ppm", "rb"); while (fgets(line, sizeof(line), in) != NULL) if (isdigit(line[0])) break; sscanf(line, "%d%d", &width, &height); if (fgets(line, sizeof(line), in)); // Ignore return value of fgets() // // Create the color separation... // cmyk = cfCMYKNew(num_comps); cfCMYKSetBlack(cmyk, 0.5, 1.0, logfunc, ld); switch (num_comps) { case 2 : // Kk cfCMYKSetLtDk(cmyk, 0, 0.5, 1.0, logfunc, ld); break; case 6 : // CcMmYK cfCMYKSetGamma(cmyk, 0, 1.0, 0.8, logfunc, ld); cfCMYKSetLtDk(cmyk, 0, 0.5, 1.0, logfunc, ld); cfCMYKSetGamma(cmyk, 2, 1.0, 0.8, logfunc, ld); cfCMYKSetLtDk(cmyk, 2, 0.5, 1.0, logfunc, ld); break; case 7 : // CcMmYKk cfCMYKSetGamma(cmyk, 0, 1.0, 0.8, logfunc, ld); cfCMYKSetLtDk(cmyk, 0, 0.5, 1.0, logfunc, ld); cfCMYKSetGamma(cmyk, 2, 1.0, 0.8, logfunc, ld); cfCMYKSetLtDk(cmyk, 2, 0.5, 1.0, logfunc, ld); cfCMYKSetLtDk(cmyk, 5, 0.5, 1.0, logfunc, ld); break; } // // Open the color separation files... // for (i = 0; i < num_comps; i ++) { sprintf(filename, "%s%d.pgm", basename, i); out[i] = fopen(filename, "wb"); fprintf(out[i], "P5\n%d %d 255\n", width, height); } sprintf(filename, "%s.ppm", basename); comp = fopen(filename, "wb"); fprintf(comp, "P6\n%d %d 255\n", width, height); // // Read the image and do the separations... // for (y = 0; y < height; y ++) { if (fread(input, width, 3, in)); // Ignore return value of fread() cfCMYKDoRGB(cmyk, input, output, width); for (x = 0, outptr = output; x < width; x ++, outptr += num_comps) { for (i = 0; i < num_comps; i ++) putc(255 - 255 * outptr[i] / 4095, out[i]); r = 4095; g = 4095; b = 4095; switch (num_comps) { case 1 : r -= outptr[0]; g -= outptr[0]; b -= outptr[0]; break; case 2 : r -= outptr[0]; g -= outptr[0]; b -= outptr[0]; r -= outptr[1] / 2; g -= outptr[1] / 2; b -= outptr[1] / 2; break; case 3 : r -= outptr[0]; g -= outptr[1]; b -= outptr[2]; break; case 4 : r -= outptr[0]; g -= outptr[1]; b -= outptr[2]; r -= outptr[3]; g -= outptr[3]; b -= outptr[3]; break; case 6 : r -= outptr[0] + outptr[1] / 2; g -= outptr[2] + outptr[3] / 3; b -= outptr[4]; r -= outptr[5]; g -= outptr[5]; b -= outptr[5]; break; case 7 : r -= outptr[0] + outptr[1] / 2; g -= outptr[2] + outptr[3] / 3; b -= outptr[4]; r -= outptr[5] + outptr[6] / 2; g -= outptr[5] + outptr[6] / 2; b -= outptr[5] + outptr[6] / 2; break; } if (r < 0) putc(0, comp); else putc(255 * r / 4095, comp); if (g < 0) putc(0, comp); else putc(255 * g / 4095, comp); if (b < 0) putc(0, comp); else putc(255 * b / 4095, comp); } } for (i = 0; i < num_comps; i ++) fclose(out[i]); fclose(comp); fclose(in); cfCMYKDelete(cmyk); }