X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=ld42_outofspace;a=blobdiff_plain;f=src%2Fmain.cc;h=ca23fbc6900ac2826bf70e06a256201aad829b49;hp=1ee34ad1583fe7ae8feaf1ff8442ce32100395db;hb=89df915930177f3bc5f71095562c6e15074be220;hpb=b8200afc389ccca3e86463eb48c0563c0e093552

diff --git a/src/main.cc b/src/main.cc
index 1ee34ad..ca23fbc 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -1,11 +1,14 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
+#include <stdarg.h>
 #include <GL/freeglut.h>
 #include "game.h"
 
 #define KEYST_SZ	65536 / 32
 
+void draw_text(float x, float y, float r, float g, float b, const char *fmt, ...);
+
 static void display();
 static void idle();
 static void reshape(int x, int y);
@@ -74,12 +77,56 @@ unsigned int game_modkeys()
 	return modkeys;
 }
 
+void draw_text(float x, float y, float r, float g, float b, const char *fmt, ...)
+{
+	char buf[256], *text = buf;
+	va_list ap;
+
+	va_start(ap, fmt);
+	vsprintf(buf, fmt, ap);
+	va_end(ap);
+
+	glMatrixMode(GL_MODELVIEW);
+	glPushMatrix();
+	glLoadIdentity();
+	glMatrixMode(GL_PROJECTION);
+	glPushMatrix();
+	glLoadIdentity();
+	glOrtho(0, win_width, 0, win_height, -1, 1);
+
+	glDisable(GL_LIGHTING);
+
+	glRasterPos2f(1, 1);
+	glColor3f(r, g, b);
+	while(*text) {
+		glutBitmapCharacter(GLUT_BITMAP_HELVETICA_18, *text++);
+	}
+
+	glEnable(GL_LIGHTING);
+
+	glPopMatrix();
+	glMatrixMode(GL_MODELVIEW);
+	glPopMatrix();
+}
+
 static void display()
 {
 	frame_time = glutGet(GLUT_ELAPSED_TIME);
 	frame_dt = (frame_time - prev_time) / 1000.0f;
 
 	game_draw();
+
+
+	static long frames, fps, prev_fps_upd;
+	draw_text(1, 1, 1, 1, 0, "fps: %ld", fps);
+
+	if(frame_time - prev_fps_upd >= 1000) {
+		fps = frames;
+		frames = 0;
+		prev_fps_upd = frame_time;
+	}
+	frames++;
+
 	glutSwapBuffers();
 }