Mercurial > MadButterfly

annotate src/geo.c @ 12:79e9edf4c00a

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Add redraw manager
author Thinker K.F. Li <thinker@branda.to>
date Mon, 28 Jul 2008 17:45:36 +0800
parents 7cfecdce94cc
children ed55009d96d3
rev   line source
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1 /*! \brief Determine who should be re-drawed.
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2 * \file
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3 * When part of graphic are chagned, not mater size, shape, or position,
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4 * the components effected or overlaid should be re-drawed. This module
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5 * figures out components that should be re-drawed.
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6 */
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7 #include <stdio.h>
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8 #include "mb_types.h"
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9
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10 static int is_scale_overlay(co_aix x1, co_aix w1, co_aix x2, co_aix w2) {
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11 if(x1 > x2) {
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12 if((x1 - x2) >= w2)
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13 return 0;
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14 } else {
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15 if((x2 - x1) >= w1)
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16 return 0;
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17 }
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18 return 1;
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19 }
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20
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21 static int _is_overlay(geo_t *r1, geo_t *r2) {
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22 if(!is_scale_overlay(r1->x, r1->w, r2->x, r2->w))
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23 return 0;
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24 if(!is_scale_overlay(r1->y, r1->h, r2->y, r2->h))
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25 return 0;
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26
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27 return 1;
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28 }
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29
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30 int is_overlay(geo_t *r1, geo_t *r2) {
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31 return _is_overlay(r1, r2);
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32 }
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33
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34 void geo_init(geo_t *g, int n_pos, co_aix pos[][2]) {
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35 co_aix min_x, max_x;
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36 co_aix min_y, max_y;
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37 co_aix x, y;
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38 int i;
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39
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40 min_x = max_x = pos[0][0];
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41 min_y = max_y = pos[0][1];
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42 for(i = 1; i < n_pos; i++) {
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43 x = pos[i][0];
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44 if(x < min_x)
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45 min_x = x;
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46 else if(x > max_x)
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47 max_x = x;
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48 y = pos[i][1];
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49 if(y < min_y)
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50 min_y = y;
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51 else if(y > max_y)
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52 max_y = y;
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53 }
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54 g->x = min_x;
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55 g->w = max_x - min_x;
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56 g->y = min_y;
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57 g->h = max_y - min_y;
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58 }
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59
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60 void geo_mark_overlay(geo_t *g, int n_others, geo_t **others,
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61 int *n_overlays, geo_t **overlays) {
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62 int i, ov_idx;
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63
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64 ov_idx = 0;
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65 for(i = 0; i < n_others; i++) {
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66 if(_is_overlay(g, others[i]))
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67 overlays[ov_idx++] = others[i];
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68 }
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69 *n_overlays = ov_idx;
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70 }
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71
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72
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73 #ifdef UNITTEST
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74
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75 #include <CUnit/Basic.h>
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76
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77 void test_geo_init(void) {
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78 co_aix data[][2] = {
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79 {33, 25}, {49, 12},
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80 {14, 28}, {39, 56}};
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81 geo_t g;
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82
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83 geo_init(&g, 4, data);
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84 CU_ASSERT(g.x == 14);
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85 CU_ASSERT(g.w == 35);
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86 CU_ASSERT(g.y == 12);
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87 CU_ASSERT(g.h == 44);
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88 }
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89
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90 void test_geo_mark_overlay(void) {
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91 geo_t _geos[3], *geos[3], *overlays[3];
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92 geo_t g;
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93 int i, n_ov;
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94
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95 for(i = 0; i < 3; i++) {
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96 _geos[i].x = i * 50;
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97 _geos[i].y = i * 50;
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98 _geos[i].w = 55;
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99 _geos[i].h = 66;
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100 geos[i] = _geos + i;
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101 }
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102 g.x = 88;
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103 g.y = 79;
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104 g.w = 70;
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105 g.h = 70;
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106
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107 /* overlay with geos[1] and geos[2] */
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108 geo_mark_overlay(&g, 3, geos, &n_ov, overlays);
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109 CU_ASSERT(n_ov == 2);
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110 CU_ASSERT(overlays[0] == geos[1]);
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111 CU_ASSERT(overlays[1] == geos[2]);
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112
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113 /* right side of geos[1], and up side of geos[2] */
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114 g.x = 105;
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115 g.y = 50;
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116 g.w = 50;
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117 g.h = 51;
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118 geo_mark_overlay(&g, 3, geos, &n_ov, overlays);
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119 CU_ASSERT(n_ov == 1);
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120 CU_ASSERT(overlays[0] == geos[2]);
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121 }
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122
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123 CU_pSuite get_geo_suite(void) {
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124 CU_pSuite suite;
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125
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126 suite = CU_add_suite("Suite_geo", NULL, NULL);
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127 CU_ADD_TEST(suite, test_geo_init);
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128 CU_ADD_TEST(suite, test_geo_mark_overlay);
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129
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130 return suite;
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131 }
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132
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133 #endif