From 8490c68f5d3fbb4d3e0030467dd785beca10c3f1 Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Sat, 1 Mar 2008 18:04:19 +0000
Subject: Begin adding text rendering support using QuesoGLC. Minor clean ups.
 Begin working on FPS counter.

git-svn-id: svn://mattst88.com/svn/glpong/trunk@13 449aeecc-241a-0410-943f-e2f883e2d7a2
---
 Makefile |  4 ++--
 ball.c   |  8 ++++----
 glpong.c | 36 +++++++++++++++++++++++++++++++-----
 glpong.h |  4 ++--
 text.c   | 40 ++++++++++++++++++++++++++++++++++++++++
 text.h   | 11 +++++++++++
 6 files changed, 90 insertions(+), 13 deletions(-)
 create mode 100644 text.c
 create mode 100644 text.h

diff --git a/Makefile b/Makefile
index 69f36fb..94d9c57 100644
--- a/Makefile
+++ b/Makefile
@@ -5,12 +5,12 @@ DEFINES=-DINLINE=inline
 CFLAGS=-Os -pipe -std=c99 -g ${DEFINES} -Wall #${WARN}
 LDFLAGS=-Wl,-O1
 INCLUDES=`sdl-config --cflags`
-LIBRARIES=`sdl-config --libs` -lSDL_image -lGL
+LIBRARIES=`sdl-config --libs` -lSDL_image -lGL -lGLC
 EXT=.exe
 
 EXE=glpong${EXT}
 
-OBJS=glpong.o ball.o #paddle.o
+OBJS=glpong.o ball.o text.o #paddle.o
 	
 all: ${OBJS}
 	${CC} ${LDFLAGS} ${OBJS} -o ${EXE} ${LIBRARIES}
diff --git a/ball.c b/ball.c
index a1c3b9e..914804c 100644
--- a/ball.c
+++ b/ball.c
@@ -23,8 +23,8 @@ length(Ball_t * balls) {
 
 void
 GLPong_BallInit() {
-	ball_width = GLPONG_WIDTH / 32.0f; /* FIXME: magic numbers */
-	ball_height = GLPONG_HEIGHT / 24.0f;
+	ball_width = 20.0f;
+	ball_height = 20.0f;
 	
 	ball = glGenLists(1);
 	glNewList(ball, GL_COMPILE);
@@ -55,8 +55,8 @@ GLPong_BallAdd(Ball_t ** balls) {
 		
 		newball->x = 100.0f;
 		newball->y = 100.0f;
-		newball->xv = GLPONG_WIDTH / (GLfloat)320; /* FIXME: magic numbers */
-		newball->yv = GLPONG_HEIGHT / (GLfloat)240;
+		newball->xv = 2.0f;
+		newball->yv = 2.0f;
 		newball->r = rand() % 255;
 		newball->g = rand() % 255;
 		newball->b = rand() % 255;
diff --git a/glpong.c b/glpong.c
index 6e87e26..cca1238 100644
--- a/glpong.c
+++ b/glpong.c
@@ -7,8 +7,10 @@
 #include "SDL_image.h"
 
 #include "glpong.h"
+#include "text.h"
 
 static int  GLPong_Init(GLPong_t * GLPong);
+static void GLPong_Deinit(GLPong_t * GLPong);
 static int  GLPong_HandleEvents();
 
 static GLuint SDL_GL_SurfaceToTexture(SDL_Surface * surface);
@@ -23,13 +25,16 @@ int main(int argc, char * argv[]) {
 		GLPONG_HEIGHT
 	};
 	
+	clock_t start;
+	GLfloat fps;
+	unsigned int frames = 0;
 	int action;
 	int done = 0;
 	
 	if (argc) {
 		if (argv) {}
 	}
-		
+	
 	if (GLPong_Init(&GLPong) < 0) {
 		fprintf(stderr, "Bailing out.\n");
 		return -1;
@@ -42,6 +47,8 @@ int main(int argc, char * argv[]) {
 #ifdef DEBUG
 	printf("%d balls\n", length(GLPong.balls));
 #endif
+
+	start = SDL_GetTicks();
 	
 	while ( !done ) {
 		action = GLPong_HandleEvents();
@@ -59,17 +66,22 @@ int main(int argc, char * argv[]) {
 		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 		
 		GLPong_BallDrawAll(GLPong.balls);
-				
+
 		SDL_GL_SwapBuffers();
 		/* end drawing */
 		
+		frames++;
+		if (frames == 10) {
+			fps = (GLfloat) frames / (SDL_GetTicks() - start) * 1000;
+			frames = 0;
+			start = SDL_GetTicks();
+			//printf("%.2f frames per second\n", GLPong.fps);
+		}
 		SDL_Delay(10);
 	}
 	
 	/* clean up */
-	GLPong_BallDeleteAll(GLPong.balls);
-	
-	GLPong_BallDeinit();
+	GLPong_Deinit(&GLPong);
 	
 	return 0;
 }
@@ -109,6 +121,11 @@ GLPong_Init(GLPong_t * GLPong) {
 		fprintf(stderr, "Cannot SetVideoMode: %s\n", SDL_GetError());
 		return -1;
 	}
+
+	if (GLPong_TextInit() == -1) {
+		fprintf(stderr, "Cannot initialize GLC context: %d\n", glcGetError());
+		return -1;
+	}
 	
 	glMatrixMode(GL_PROJECTION);
 	glLoadIdentity();
@@ -132,6 +149,15 @@ GLPong_Init(GLPong_t * GLPong) {
 	return 0;
 }
 
+static void
+GLPong_Deinit(GLPong_t * GLPong) {
+	GLPong_BallDeleteAll(GLPong->balls);
+	
+	GLPong_BallDeinit();
+
+	GLPong_TextDeinit();
+}
+
 static int
 GLPong_HandleEvents() {
 	SDL_Event Event;
diff --git a/glpong.h b/glpong.h
index 43ee592..6bbde04 100644
--- a/glpong.h
+++ b/glpong.h
@@ -7,8 +7,8 @@
 #include "ball.h"
 /*#include "paddle.h"*/
 
-#define GLPONG_WIDTH	640
-#define GLPONG_HEIGHT	480
+#define GLPONG_WIDTH	640.0f
+#define GLPONG_HEIGHT	480.0f
 
 #define GLPONG_NOACTION	0
 #define GLPONG_EXIT	1
diff --git a/text.c b/text.c
new file mode 100644
index 0000000..cd90efe
--- /dev/null
+++ b/text.c
@@ -0,0 +1,40 @@
+
+#include <GL/glc.h>
+
+#include "text.h"
+
+static GLuint font;
+
+int
+GLPong_TextInit() {
+	GLuint context = glcGenContext();
+	glcContext(context);
+
+	
+	if (!glcIsContext(context)) {
+		return -1;
+	}
+
+#ifdef DEBUG
+	count = glcGeti(GLC_CATALOG_COUNT);
+	for (i = 0; i < count; i++) {
+		printf("%s\n", (char *)glcGetListc(GLC_CATALOG_LIST, i));
+	}
+#endif
+		
+	font = glcGenFontID();
+	glcNewFontFromFamily(font, "Ar");
+	glcFontFace(font, "Normal");
+	glcRenderStyle(GLC_TEXTURE);
+	glcFont(font);
+
+	return 0;
+}
+
+void
+GLPong_TextDeinit() {
+	glcDeleteFont(font);
+}
+
+void
+GLPong_TextDrawFPS(GLfloat fps) { }
diff --git a/text.h b/text.h
new file mode 100644
index 0000000..dfc3458
--- /dev/null
+++ b/text.h
@@ -0,0 +1,11 @@
+#ifndef TEXT_H
+#define TEXT_H
+
+#include <GL/glc.h>
+
+int  GLPong_TextInit();
+void GLPong_TextDeinit();
+void GLPong_TextDrawFPS(GLfloat fps);
+
+#endif
+
-- 
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