annotate nodejs/X_supp_njs.c @ 760:5781b2485e38

Fix position issue of stext. Sometime, stext does not show at correct position. After some study, it is caused by a typo in the code of create scaled font (make_scaled_font_face()). The typo causes a fault in compute transform matrix for scale fonts.
author Thinker K.F. Li <thinker@codemud.net>
date Sat, 28 Aug 2010 22:54:07 +0800
parents cedfe4966fd6
children 586e50f82c1f
rev   line source
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249bcbf07eb0 Reuse and adapt X_supp.c by implmeneting X_supp_njs.c
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1 /*! \brief Implement X11 backend for nodejs plugin.
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2 *
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3 * Since nodejs use libev to handle event loops, part of X11 backend
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4 * code can not be used directly. The part of code should be rewrote.
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5 * The part is about
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6 */
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7 #include <stdio.h>
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8 #include <X11/Xlib.h>
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9 #include <X11/Xutil.h>
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10 #include <ev.h>
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11 #include "mb_X_supp.h"
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12 #include "mb_tools.h"
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13 #include "X_supp_njs.h"
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14
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15 #ifndef ASSERT
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16 #define ASSERT(x)
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17 #endif
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18
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19 static void timer_cb(EV_P_ ev_timer *tmwatcher, int revent);
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20
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21 /*! \brief Register next timeout with libev.
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22 */
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23 static void
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24 set_next_timeout(njs_runtime_t *rt) {
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25 mb_tman_t *tman;
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26 mb_timeval_t now, tmo;
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27 ev_tstamp tout;
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28 int r;
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29
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30 tman = X_MB_tman(rt->xrt);
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31 get_now(&now);
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32 r = mb_tman_next_timeout(tman, &now, &tmo);
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33 if(r == 0) {
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34 MB_TIMEVAL_DIFF(&tmo, &now);
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35 tout = (ev_tstamp)MB_TIMEVAL_SEC(&tmo) +
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36 (ev_tstamp)MB_TIMEVAL_USEC(&tmo) / 1000000;
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37 ev_timer_init(&rt->tmwatcher, timer_cb, tout, 0);
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38 ev_timer_start(&rt->tmwatcher);
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39 rt->enable_timer = 1;
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40 } else
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41 rt->enable_timer = 0;
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42 }
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43
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44 static void
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45 x_conn_cb(EV_P_ ev_io *iowatcher, int revent) {
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46 njs_runtime_t *rt = MEM2OBJ(iowatcher, njs_runtime_t, iowatcher);
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47 redraw_man_t *rdman;
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48 extern void _X_MB_handle_x_event_for_nodejs(void *rt);
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49
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50 rdman = X_MB_rdman(rt->xrt);
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51 _X_MB_handle_x_event_for_nodejs(rt->xrt);
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52 rdman_redraw_changed(rdman);
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53
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54 if(rt->enable_timer == 0) /* no installed timeout */
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55 set_next_timeout(rt);
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56 }
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57
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58 static void
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59 timer_cb(EV_P_ ev_timer *tmwatcher, int revent) {
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60 njs_runtime_t *rt = MEM2OBJ(tmwatcher, njs_runtime_t, tmwatcher);
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61 mb_tman_t *tman;
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62 redraw_man_t *rdman;
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63 mb_timeval_t now;
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64 extern int _X_MB_flush_x_conn_for_nodejs(void *rt);
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65
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66 tman = X_MB_tman(rt->xrt);
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67 get_now(&now);
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68 mb_tman_handle_timeout(tman, &now);
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69
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70 rdman = X_MB_rdman(rt->xrt);
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71 rdman_redraw_changed(rdman);
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72 _X_MB_flush_x_conn_for_nodejs(rt->xrt);
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73
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74 set_next_timeout(rt);
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75 }
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76
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77 /*! \brief Handle connection coming data and timeout of timers.
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78 *
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79 * \param rt is a runtime object for X.
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80 */
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81 void
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82 X_njs_MB_init_handle_connection(njs_runtime_t *rt) {
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83 void *xrt = rt->xrt;
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84 int fd;
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85 extern int _X_MB_get_x_conn_for_nodejs(void *rt);
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86
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87 /*
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88 * Setup watcher for X connection.
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89 */
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90 fd = _X_MB_get_x_conn_for_nodejs(xrt);
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91 ev_io_init(&rt->iowatcher, x_conn_cb, fd, EV_READ);
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92 ev_io_start(&rt->iowatcher);
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93 rt->enable_io = 1;
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94
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95 set_next_timeout(rt);
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96 }
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97
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98 /*! \brief Free njs_runtime_t.
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99 */
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100 void
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101 X_njs_MB_free(njs_runtime_t *rt) {
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102 /*
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103 * stop IO and timer watcher
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104 */
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105 if(rt->enable_io)
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106 ev_io_stop(&rt->iowatcher);
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107 if(rt->enable_timer)
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108 ev_timer_stop(&rt->tmwatcher);
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109
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110 X_MB_free(rt->xrt);
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111 free(rt);
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112 }
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113
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114 int
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115 X_njs_MB_flush(njs_runtime_t *rt) {
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116 void *xrt = rt->xrt;
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117 int r;
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118 extern int _X_MB_flush_x_conn_for_nodejs(void *rt);
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119
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120 _X_MB_flush_x_conn_for_nodejs(xrt);
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121
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122 return r;
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123 }
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124
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125 njs_runtime_t *
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126 X_njs_MB_new(char *display_name, int w, int h) {
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127 njs_runtime_t *rt;
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128 void *xrt;
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129
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130 rt = (njs_runtime_t *)malloc(sizeof(njs_runtime_t));
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131 ASSERT(rt != NULL);
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132
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133 xrt = X_MB_new(display_name, w, h);
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134
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135 rt->xrt = xrt;
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136 rt->enable_io = 0;
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137 rt->enable_timer = 0; /* no timer, now */
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138
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139 return rt;
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140 }
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141
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142 /*! \brief Get X runtime that is backend of this njs runtime.
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143 */
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144 void *
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145 _X_njs_MB_get_X_runtime(njs_runtime_t *rt) {
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146 return rt->xrt;
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147 }