src/apps/glteapot/FPS.cpp

   1 /*
   2         Copyright 1999, Be Incorporated.   All Rights Reserved.
   3         This file may be used under the terms of the Be Sample Code License.
   4 */
   5 #include "FPS.h"
   6
   7 FPS::FPS()
   8 {
   9 }
  10
  11
  12 FPS::~FPS()
  13 {
  14 }
  15
  16
  17 void
  18 FPS::drawChar(GLfloat x, GLfloat y, GLint number)
  19 {
  20         static bool numbers[13][7] = {
  21                 { true, true, true, true, true, true, false },          /* 0 */
  22                 { false, true, true, false, false, false, false },      /* 1 */
  23                 { true, true, false, true, true, false, true },         /* 2 */
  24                 { true, true, true, true, false, false, true },         /* 3 */
  25                 { false, true, true, false, false, true, true },        /* 4 */
  26                 { true, false, true, true, false, true, true },         /* 5 */
  27                 { true, false, true, true, true, true, true },          /* 6 */
  28                 { true, true, true, false, false, false, false },       /* 7 */
  29                 { true, true, true, true, true, true, true },           /* 8 */
  30                 { true, true, true, false, false, true, true },         /* 9 */
  31
  32                 { true, false, false, false, true, true, true },        /* F */
  33                 { true, true, false, false, true, true, true },         /* P */
  34                 { true, false, true, true, false, true, true },         /* S */
  35         };
  36
  37         static GLfloat gap = 0.03;
  38         static GLfloat size = 1.0;
  39
  40         static GLfloat x0 = -size / 4;
  41         static GLfloat x1 = -size / 4 + gap;
  42         static GLfloat x2 = -x1;
  43         static GLfloat x3 = -x0;
  44
  45         static GLfloat y0 = size / 2;
  46         static GLfloat y1 = size / 2 - gap;
  47         static GLfloat y2 = 0 + gap;
  48         static GLfloat y3 = 0;
  49         static GLfloat y4 = -y2;
  50         static GLfloat y5 = -y1;
  51         static GLfloat y6 = -y0;
  52
  53         glBegin(GL_LINES);
  54         if (numbers[number][0]) {
  55                 glVertex2f(x1 + x, y0 + y);
  56                 glVertex2f(x2 + x, y0 + y);
  57         }
  58
  59         if (numbers[number][1]) {
  60                 glVertex2f(x3 + x, y1 + y);
  61                 glVertex2f(x3 + x, y2 + y);
  62         }
  63
  64         if (numbers[number][2]) {
  65                 glVertex2f(x3 + x, y4 + y);
  66                 glVertex2f(x3 + x, y5 + y);
  67         }
  68
  69         if (numbers[number][3]) {
  70                 glVertex2f(x1 + x, y6 + y);
  71                 glVertex2f(x2 + x, y6 + y);
  72         }
  73
  74         if (numbers[number][4]) {
  75                 glVertex2f(x0 + x, y5 + y);
  76                 glVertex2f(x0 + x, y4 + y);
  77         }
  78
  79         if (numbers[number][5]) {
  80                 glVertex2f(x0 + x, y2 + y);
  81                 glVertex2f(x0 + x, y1 + y);
  82         }
  83
  84         if (numbers[number][6]) {
  85                 glVertex2f(x1 + x, y3 + y);
  86                 glVertex2f(x2 + x, y3 + y);
  87         }
  88
  89         glEnd();
  90 }
  91
  92
  93 void
  94 FPS::drawCounter(GLfloat frameRate)
  95 {
  96         GLfloat pos = 0;
  97         int ifps = (int)frameRate;
  98
  99         int count = 0;
 100         int number = 1;
 101         while (ifps > number) {
 102                 number *= 10;
 103                 count++;
 104         }
 105
 106         number /= 10;
 107         for (int i = 0; i < count; i++) {
 108                 drawChar(pos, 0, (ifps / number) % 10);
 109                 pos += 1.0;
 110                 if (number == 1)
 111                         break;
 112                 number /= 10;
 113         }
 114
 115         pos += 0.5;
 116         drawChar(pos, 0, 10);
 117         pos += 1;
 118         drawChar(pos, 0, 11);
 119         pos += 1;
 120         drawChar(pos, 0, 12);
 121         pos += 1;
 122 }