1 #include <stdlib.h> 2 #include <stdio.h> 3 #include <assert.h> 4 #include "utils.h" 5 #include "pixman-inlines.h" 6 7 /* A trivial reference implementation for 8 * 'bilinear_pad_repeat_get_scanline_bounds' 9 */ 10 static void 11 bilinear_pad_repeat_get_scanline_bounds_ref (int32_t source_image_width, 12 pixman_fixed_t vx_, 13 pixman_fixed_t unit_x, 14 int32_t * left_pad, 15 int32_t * left_tz, 16 int32_t * width, 17 int32_t * right_tz, 18 int32_t * right_pad) 19 { 20 int w = *width; 21 int64_t vx = vx_; 22 *left_pad = 0; 23 *left_tz = 0; 24 *width = 0; 25 *right_tz = 0; 26 *right_pad = 0; 27 while (--w >= 0) 28 { 29 if (vx < 0) 30 { 31 if (vx + pixman_fixed_1 < 0) 32 *left_pad += 1; 33 else 34 *left_tz += 1; 35 } 36 else if (vx + pixman_fixed_1 >= pixman_int_to_fixed (source_image_width)) 37 { 38 if (vx >= pixman_int_to_fixed (source_image_width)) 39 *right_pad += 1; 40 else 41 *right_tz += 1; 42 } 43 else 44 { 45 *width += 1; 46 } 47 vx += unit_x; 48 } 49 } 50 51 int 52 main (void) 53 { 54 int i; 55 prng_srand (0); 56 for (i = 0; i < 10000; i++) 57 { 58 int32_t left_pad1, left_tz1, width1, right_tz1, right_pad1; 59 int32_t left_pad2, left_tz2, width2, right_tz2, right_pad2; 60 pixman_fixed_t vx = prng_rand_n(10000 << 16) - (3000 << 16); 61 int32_t width = prng_rand_n(10000); 62 int32_t source_image_width = prng_rand_n(10000) + 1; 63 pixman_fixed_t unit_x = prng_rand_n(10 << 16) + 1; 64 width1 = width2 = width; 65 66 bilinear_pad_repeat_get_scanline_bounds_ref (source_image_width, 67 vx, 68 unit_x, 69 &left_pad1, 70 &left_tz1, 71 &width1, 72 &right_tz1, 73 &right_pad1); 74 75 bilinear_pad_repeat_get_scanline_bounds (source_image_width, 76 vx, 77 unit_x, 78 &left_pad2, 79 &left_tz2, 80 &width2, 81 &right_tz2, 82 &right_pad2); 83 84 assert (left_pad1 == left_pad2); 85 assert (left_tz1 == left_tz2); 86 assert (width1 == width2); 87 assert (right_tz1 == right_tz2); 88 assert (right_pad1 == right_pad2); 89 } 90 91 return 0; 92 } 93
