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annotate src/geo.c @ 489:23c7667b3ec0 Android_Skia

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Fix a potential bug when destroy a rdman. When a rdman is dirty, free shapes and coords works specially. Objects are append to a free list. They are not real freed until rdman being clean. redraw_man_destroy() free shapes and coords with free functions of them. If rdman is dirty when destroy it, objects would be leaked. The changeset make rdman clean before free shapes and coords to make objects being freed correctly.
author Thinker K.F. Li <thinker@branda.to>
date Sun, 22 Nov 2009 20:41:27 +0800
parents 65cabbdd5284
children 586e50f82c1f
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 <string.h>
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9 #include "mb_types.h"
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10
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11 static int is_scale_overlay(co_aix x1, co_aix w1, co_aix x2, co_aix w2) {
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12 if(x1 > x2) {
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13 if((x1 - x2) >= w2)
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14 return 0;
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15 } else {
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16 if((x2 - x1) >= w1)
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17 return 0;
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18 }
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19 return 1;
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20 }
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21
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22 static int _areas_are_overlay(area_t *r1, area_t *r2) {
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23 if(is_scale_overlay(r1->x, r1->w, r2->x, r2->w) &&
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24 is_scale_overlay(r1->y, r1->h, r2->y, r2->h))
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25 return 1;
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26
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27 return 0;
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28 }
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29
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30 int areas_are_overlay(area_t *r1, area_t *r2) {
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31 return _areas_are_overlay(r1, r2);
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32 }
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33
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34 void area_init(area_t *area, 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
144
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40 /*! \note {x=0, y=0, w=0, h=0} geometry value for a n_pos=0 request
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41 * can prevent cursor flasing for Cairo XLib.
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42 * (see changeset 21db69d46835)
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43 */
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44 if(n_pos == 0) {
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45 area->x = 0;
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46 area->w = 0;
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47 area->y = 0;
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48 area->h = 0;
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49 return;
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50 }
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51
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52 min_x = max_x = pos[0][0];
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53 min_y = max_y = pos[0][1];
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54 for(i = 1; i < n_pos; i++) {
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55 x = pos[i][0];
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56 if(x < min_x)
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57 min_x = x;
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58 else if(x > max_x)
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59 max_x = x;
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60 y = pos[i][1];
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61 if(y < min_y)
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62 min_y = y;
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63 else if(y > max_y)
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64 max_y = y;
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65 }
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66
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67 area->x = min_x;
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68 area->w = max_x - min_x + 1;
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69 area->y = min_y;
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70 area->h = max_y - min_y + 1;
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71 }
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72
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73 void geo_init(geo_t *g) {
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74 memset(g, 0, sizeof(geo_t));
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75 g->cur_area = g->areas;
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76 g->last_area = g->areas + 1;
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77 }
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78
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79 void geo_from_positions(geo_t *g, int n_pos, co_aix pos[][2]) {
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80 area_init(g->cur_area, n_pos, pos);
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81 }
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82
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83 void geo_mark_overlay(geo_t *g, int n_others, geo_t **others,
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84 int *n_overlays, geo_t **overlays) {
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85 int i, ov_idx;
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86
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87 ov_idx = 0;
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88 for(i = 0; i < n_others; i++) {
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89 if(_areas_are_overlay(g->cur_area, others[i]->cur_area))
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90 overlays[ov_idx++] = others[i];
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91 }
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92 *n_overlays = ov_idx;
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93 }
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94
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95
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96 #ifdef UNITTEST
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97
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98 #include <CUnit/Basic.h>
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99
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100 void test_geo_from_positions(void) {
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101 co_aix data[][2] = {
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102 {33, 25}, {49, 12},
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103 {14, 28}, {39, 56}};
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104 geo_t g;
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105
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106 geo_init(&g);
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107 geo_from_positions(&g, 4, data);
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108 CU_ASSERT(g.cur_area->x == 14);
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109 CU_ASSERT(g.cur_area->w == 36);
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110 CU_ASSERT(g.cur_area->y == 12);
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111 CU_ASSERT(g.cur_area->h == 45);
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112 }
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113
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114 void test_geo_mark_overlay(void) {
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115 geo_t _geos[3], *geos[3], *overlays[3];
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116 geo_t g;
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117 co_aix pos[2][2];
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118 int i, n_ov;
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119
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120 for(i = 0; i < 3; i++) {
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121 pos[0][0] = i * 50;
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122 pos[0][1] = i * 50;
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123 pos[1][0] = i * 50 + 55;
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124 pos[1][1] = i * 50 + 66;
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125 geo_init(_geos + i);
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126 geo_from_positions(_geos + i, 2, pos);
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127 geos[i] = _geos + i;
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128 }
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129 pos[0][0] = 88;
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130 pos[0][1] = 79;
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131 pos[1][0] = 88 + 70;
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132 pos[1][1] = 79 + 70;
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133 geo_init(&g);
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134 geo_from_positions(&g, 2, pos);
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135
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136 /* overlay with geos[1] and geos[2] */
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137 geo_mark_overlay(&g, 3, geos, &n_ov, overlays);
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138 CU_ASSERT(n_ov == 2);
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139 CU_ASSERT(overlays[0] == geos[1]);
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140 CU_ASSERT(overlays[1] == geos[2]);
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141
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142 /* right side of geos[1], and up side of geos[2] */
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143 pos[0][0] = 106;
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144 pos[0][1] = 51;
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145 pos[1][0] = 106 + 49;
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146 pos[1][1] = 51 + 49;
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147 geo_from_positions(&g, 2, pos);
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148 geo_mark_overlay(&g, 3, geos, &n_ov, overlays);
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149 CU_ASSERT(n_ov == 1);
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150 CU_ASSERT(overlays[0] == geos[2]);
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151 }
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152
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153 CU_pSuite get_geo_suite(void) {
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154 CU_pSuite suite;
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155
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156 suite = CU_add_suite("Suite_geo", NULL, NULL);
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157 CU_ADD_TEST(suite, test_geo_from_positions);
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158 CU_ADD_TEST(suite, test_geo_mark_overlay);
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159
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160 return suite;
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161 }
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162
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163 #endif