From cfb3a61dc358ee8d82294fd28e4090e10252431c Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Fri, 4 Aug 2006 22:11:17 +0000
Subject: Support for background images :P

git-svn-id: svn://mattst88.com/svn/glpong3d/trunk@10 4dd1920e-271a-0410-bca0-81b404a81564
---
 glpong3d.c | 23 ++++++++++++++++++++++-
 glpong3d.h |  2 ++
 2 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/glpong3d.c b/glpong3d.c
index 26d09d9..b9aee6c 100644
--- a/glpong3d.c
+++ b/glpong3d.c
@@ -96,6 +96,11 @@ void GLPong_Init() {
 	printf("OpenGL Version:    %s\n", glGetString(GL_VERSION));
 	printf("OpenGL Extensions: %s\n", glGetString(GL_EXTENSIONS));
 	
+	temp = IMG_Load("background.jpg");
+	if (temp != NULL) {
+		background = SDL_GL_SurfaceToTexture(temp);
+	}
+	SDL_FreeSurface(temp);
 	temp = IMG_Load("128x128.png");
 	ball_texture = SDL_GL_SurfaceToTexture(temp);
 	SDL_FreeSurface(temp);	
@@ -163,7 +168,23 @@ void GLPong_HandleEvents() {
 
 void GLPong_Draw() {
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
+	
+	glLoadIdentity();
+	if (background) {
+		glBindTexture(GL_TEXTURE_2D, background);
+		glEnable(GL_TEXTURE_2D);
+	} else {
+		glColor3f(0.0f, 0.0f, 0.0f);
+	}
+	glTranslatef(0.0f, 0.0f, -9.0f);
+	glBegin(GL_QUADS);	
+		glTexCoord2f(0.875f, 0.0f); glVertex2f( 1.5f,  1.0f);	/* Upper Right */
+		glTexCoord2f(0.125f, 0.0f); glVertex2f(-1.5f,  1.0f);	/* Upper Left  */
+		glTexCoord2f(0.125f, 1.0f); glVertex2f(-1.5f, -1.0f);	/* Lower Left */
+		glTexCoord2f(0.875f, 1.0f); glVertex2f( 1.5f, -1.0f);	/* Lower Right */	
+	glEnd();
+	glDisable(GL_TEXTURE_2D);
+	
 	glLoadIdentity();
 	glColor3f(0.0f, 1.0f, 0.0f);
 	
diff --git a/glpong3d.h b/glpong3d.h
index 27122ab..dad9526 100644
--- a/glpong3d.h
+++ b/glpong3d.h
@@ -7,6 +7,8 @@
 #include "ball.h"
 #include "paddle.h"
 
+GLuint background;
+
 typedef struct {
 	GLfloat x, y;
 } Mouse_t;
-- 
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