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annotate prototype/src/cmdcon.cc @ 24:e122ba214ee1

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implementing the command console
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 23 Aug 2012 18:03:11 +0300
parents
children 527fede30057
rev   line source
nuclear@24 1 #include <stdlib.h>
nuclear@24 2 #include <iostream>
nuclear@24 3 #include <sstream>
nuclear@24 4 #include <string>
nuclear@24 5 #include "opengl.h"
nuclear@24 6 #include "cmdcon.h"
nuclear@24 7 #include "drawtext.h"
nuclear@24 8 #include "datapath.h"
nuclear@24 9 #include "cfg.h"
nuclear@24 10
nuclear@24 11 #define FONT_FILENAME "droid_sans_mono.ttf"
nuclear@24 12
nuclear@24 13 static void runcmd();
nuclear@24 14 static void complete();
nuclear@24 15
nuclear@24 16 static struct dtx_font *font;
nuclear@24 17
nuclear@24 18 std::string cmdline;
nuclear@24 19
nuclear@24 20 bool init_cmdcon()
nuclear@24 21 {
nuclear@24 22 const char *path = datafile_path(FONT_FILENAME);
nuclear@24 23 if(!path) {
nuclear@24 24 fprintf(stderr, "failed to locate font file: %s\n", FONT_FILENAME);
nuclear@24 25 return false;
nuclear@24 26 }
nuclear@24 27
nuclear@24 28 if(!(font = dtx_open_font(path, 12))) {
nuclear@24 29 fprintf(stderr, "failed to open font file: %s\n", path);
nuclear@24 30 return false;
nuclear@24 31 }
nuclear@24 32 dtx_use_font(font, 12);
nuclear@24 33 return true;
nuclear@24 34 }
nuclear@24 35
nuclear@24 36 void cleanup_cmdcon()
nuclear@24 37 {
nuclear@24 38 if(font) {
nuclear@24 39 dtx_close_font(font);
nuclear@24 40 }
nuclear@24 41 }
nuclear@24 42
nuclear@24 43 void cmdcon_keypress(int key)
nuclear@24 44 {
nuclear@24 45 if(isprint(key)) {
nuclear@24 46 cmdline.push_back(key);
nuclear@24 47 return;
nuclear@24 48 }
nuclear@24 49
nuclear@24 50 switch(key) {
nuclear@24 51 case '\n':
nuclear@24 52 case '\r':
nuclear@24 53 runcmd();
nuclear@24 54 cmdline.clear();
nuclear@24 55 break;
nuclear@24 56
nuclear@24 57 case '\t':
nuclear@24 58 complete();
nuclear@24 59 break;
nuclear@24 60
nuclear@24 61 case '\b':
nuclear@24 62 if(!cmdline.empty()) {
nuclear@24 63 cmdline.erase(cmdline.back());
nuclear@24 64 }
nuclear@24 65 break;
nuclear@24 66
nuclear@24 67 default:
nuclear@24 68 break;
nuclear@24 69 }
nuclear@24 70 }
nuclear@24 71
nuclear@24 72 void draw_cmdcon()
nuclear@24 73 {
nuclear@24 74 glMatrixMode(GL_PROJECTION);
nuclear@24 75 glPushMatrix();
nuclear@24 76 glLoadIdentity();
nuclear@24 77 glOrtho(0, cfg.width, -cfg.height, 0, -1, 1);
nuclear@24 78 glMatrixMode(GL_MODELVIEW);
nuclear@24 79 glPushMatrix();
nuclear@24 80 glLoadIdentity();
nuclear@24 81
nuclear@24 82 glPushAttrib(GL_ENABLE_BIT | GL_CURRENT_BIT);
nuclear@24 83 glEnable(GL_BLEND);
nuclear@24 84 glDisable(GL_DEPTH_TEST);
nuclear@24 85 glDisable(GL_LIGHTING);
nuclear@24 86 glUseProgram(0);
nuclear@24 87 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
nuclear@24 88
nuclear@24 89 glBegin(GL_QUADS);
nuclear@24 90 glColor4f(0.4, 0.4, 0.4, 0.5);
nuclear@24 91 glVertex2f(-10, -10);
nuclear@24 92 glVertex2f(10, -10);
nuclear@24 93 glVertex2f(10, 10);
nuclear@24 94 glVertex2f(-10, 10);
nuclear@24 95 glEnd();
nuclear@24 96
nuclear@24 97 glTranslatef(cfg.width / 2, cfg.height / 2, 0);
nuclear@24 98
nuclear@24 99 glColor4f(0.2, 0.9, 0.3, 1.0);
nuclear@24 100 dtx_string(cmdline.c_str());
nuclear@24 101 dtx_flush();
nuclear@24 102
nuclear@24 103 glPopAttrib();
nuclear@24 104
nuclear@24 105 glMatrixMode(GL_PROJECTION);
nuclear@24 106 glPopMatrix();
nuclear@24 107 glMatrixMode(GL_MODELVIEW);
nuclear@24 108 glPopMatrix();
nuclear@24 109 }
nuclear@24 110
nuclear@24 111 static bool cmd_toggle_wire(std::stringstream &strin)
nuclear@24 112 {
nuclear@24 113 static bool wire;
nuclear@24 114 wire = !wire;
nuclear@24 115 glPolygonMode(GL_FRONT_AND_BACK, wire ? GL_LINE : GL_FILL);
nuclear@24 116 return true;
nuclear@24 117 }
nuclear@24 118
nuclear@24 119 static bool cmd_quit(std::stringstream &strin)
nuclear@24 120 {
nuclear@24 121 exit(0);
nuclear@24 122 }
nuclear@24 123
nuclear@24 124 static struct {
nuclear@24 125 std::string name;
nuclear@24 126 bool (*func)(std::stringstream &strin);
nuclear@24 127 } cmd[] = {
nuclear@24 128 {"wire", cmd_toggle_wire},
nuclear@24 129 {"quit", cmd_quit},
nuclear@24 130 {"exit", cmd_quit}
nuclear@24 131 };
nuclear@24 132 #define NUM_CMD (int)(sizeof cmd / sizeof *cmd)
nuclear@24 133
nuclear@24 134 static void runcmd()
nuclear@24 135 {
nuclear@24 136 std::stringstream strin(cmdline);
nuclear@24 137
nuclear@24 138 std::string token;
nuclear@24 139 strin >> token;
nuclear@24 140
nuclear@24 141 for(int i=0; i<NUM_CMD; i++) {
nuclear@24 142 if(token == cmd[i].name) {
nuclear@24 143 cmd[i].func(strin);
nuclear@24 144 return;
nuclear@24 145 }
nuclear@24 146 }
nuclear@24 147
nuclear@24 148 std::cerr << "unrecognized command: " << token << std::endl;
nuclear@24 149 }
nuclear@24 150
nuclear@24 151 static void complete()
nuclear@24 152 {
nuclear@24 153 }