1. 画像・テキスト表示

pygameとopenglを使ったひな形的なコードです。
　・png画像表示
　・日本語テキスト表示
　・pngは透過色指定で透過(抜け色)
　・画像／フォントを行列により回転
　・アルファブレンディング
を行っています。したがって、pygameとpyopenglモジュールが必要です。

また、コードと同じフォルダに、以下のファイルを置いてください。
　・test.png
　　（表示用。テキトーな画像でOK。縦横サイズともに２の倍数。256*256ぐらいがおすすめ。）
　・ipag.ttf
　　（IPAフォント。どっかでダウンロードしてきてください。）

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os,sys
import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *

def initialize(w,h):
	#pygame init
	pygame.init()
	modelist = pygame.display.list_modes()
	nextmode = [l for l in modelist if l[0]>=w and l[1]>=h]
	bestx, besty = -1,-1
	for l in nextmode:
		if (bestx==-1 or bestx>=l[0]) and (besty==-1 or besty>=l[1]):
			bestx, besty = l[0],l[1]
	pygame.display.set_mode((w,h), pygame.OPENGL|pygame.DOUBLEBUF)

	#opengl init
	glClearColor(0.0, 0.0, 0.0, 0.0)
	glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
	glMatrixMode(GL_PROJECTION)
	glLoadIdentity();
	gluOrtho2D(0, w, h, 0)
	glMatrixMode(GL_MODELVIEW)
 
	glEnable(GL_TEXTURE_2D)
	glEnable(GL_BLEND)
	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)

def main():
	#1, init
	filename = "test.png"
	font_filename="ipag.ttf"
	clock = pygame.time.Clock(); fps = 60
	initialize(640,480)
	
	#2-1, load image(picture)
	try:
		surface = pygame.image.load(filename)
	except:
		print "file load error"; sys.exit()
	surface.set_colorkey((0,0,255),pygame.RLEACCEL )
	data = pygame.image.tostring(surface, "RGBA", True)
	width, height = surface.get_size()
	texture = glGenTextures(1)
	glBindTexture(GL_TEXTURE_2D, texture)
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,GL_UNSIGNED_BYTE, data)
	#gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, width, height, GL_RGBA,GL_UNSIGNED_BYTE, data)
	
	#2-2, load image(font)
	if font_filename != "":
		font = pygame.font.Font(font_filename,30)
		font_surface = font.render(u"こんにちは、世界",True,(255,255,255,255))
		font_data = pygame.image.tostring(font_surface,"RGBA",True)
		font_width, font_height = font_surface.get_size()
		font_texture = glGenTextures(1)
		glBindTexture(GL_TEXTURE_2D, font_texture)
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, font_width, font_height, 0, GL_RGBA,GL_UNSIGNED_BYTE, font_data)

	
	#3-1, make display list(picture)
	displaylist = glGenLists(1)
	glNewList(displaylist,GL_COMPILE);
	glBindTexture(GL_TEXTURE_2D, texture)
	glBegin(GL_QUADS)
	glTexCoord2f(0, 0); glVertex2f(0, height)
	glTexCoord2f(0, 1); glVertex2f(0, 0)
	glTexCoord2f(1, 1); glVertex2f(width, 0)
	glTexCoord2f(1, 0); glVertex2f( width,  height)
	glEnd()
	glEndList()
	
	#3-2, make display list(font)
	if font_filename != "":
		font_displaylist = glGenLists(1)
		glNewList(font_displaylist,GL_COMPILE);
		glBindTexture(GL_TEXTURE_2D, font_texture)
		glBegin(GL_QUADS)
		glTexCoord2f(0, 0); glVertex2f(0, font_height)
		glTexCoord2f(0, 1); glVertex2f(0, 0)
		glTexCoord2f(1, 1); glVertex2f(font_width, 0)
		glTexCoord2f(1, 0); glVertex2f( font_width,  font_height)
		glEnd()
		glEndList()
	
	#4, begin event loop
	rot=0
	while True:	
		#4-1, matrix setting(picture)
		glLoadIdentity()
		glTranslate(width/2,height/2,0)
		glRotate(rot,0,0,-1)
		glTranslate(-width/2,-height/2,0)
		#4-2, draw(picture)
		glClear( GL_COLOR_BUFFER_BIT )
		glColor4f(1.0, 1.0, 1.0, rot/360.0)
		glCallList(displaylist)
		
		#4-3, matrix setting(font)
		glLoadIdentity()
		glTranslate(300,200,0)
		glRotate(-rot,0,0,-1)
		glTranslate(-font_width/2,-font_height/2,0)
		#4-4, draw(font)
		if font_filename != "":
			glColor4f(1.0, 1.0, 1.0, rot/360.0)
			glCallList(font_displaylist)

		pygame.display.flip()
		
		#4-5, event
		for e in pygame.event.get():
			if e.type == QUIT or (e.type == KEYDOWN and e.key == K_ESC):
				return
		
		#4-6, wait
		clock.tick(fps)
		
		#other
		rot=0 if rot >= 360 else rot+0.5
	
	#delete texture and displaylist
	glDeleteLists(displaylist,1)
	glDeleteTextures(texture)

if __name__ == '__main__':
	main()