glClearとglClearColorを使用して、フレームバッファをアルファ透明度を含む色で塗りつぶしたいと思います。ただし、フレームバッファは、画面にレンダリングされるテクスチャにバインドされると、常に不透明としてレンダリングされます。
フレームバッファにレンダリングされるすべてのものが透明性を維持するようにしたいです。背景を変えたいだけです。
次のコードを参照してください。
def create_texture(surface):
surface.texture = glGenTextures(1)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity() #Loads model matrix
glBindTexture(GL_TEXTURE_2D, surface.texture) #Binds the current 2D texture to the texture to be drawn
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR) #Required to be set for maping the pixel data
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR) #Similar as above
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, surface.surface_size[0], surface.surface_size[1], 0, GL_RGBA,GL_UNSIGNED_BYTE, surface.data) #Put surface pixel data into texture
if surface.data == None:
setup_framebuffer(surface)
c = [float(sc)/255.0 for sc in surface.colour] #Divide colours by 255 because OpenGL uses 0-1
if surface.background_alpha:
c[3] = float(surface.background_alpha)/255.0
glClearColor(*c)
glClear(GL_COLOR_BUFFER_BIT)
end_framebuffer()
Surface.texture_ready.append(surface)
def setup_framebuffer(surface):
#Create texture if not done already
if surface.texture == None:
create_texture(surface)
#Render child to parent
if surface.frame_buffer == None:
surface.frame_buffer = glGenFramebuffersEXT(1)
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, surface.frame_buffer)
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, surface.texture, 0)
glPushAttrib(GL_VIEWPORT_BIT)
glViewport(0,0,surface._scale[0],surface._scale[1])
glMatrixMode(GL_PROJECTION)
glLoadIdentity() #Load the projection matrix
gluOrtho2D(0,surface._scale[0],0,surface._scale[1])
def end_framebuffer():
glPopAttrib()
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0)
glMatrixMode(GL_PROJECTION)
glLoadIdentity() #Load the projection matrix
gluOrtho2D(0,1280,720,0) #Set an orthorgraphic view
surface.background_alphaは、フレームバッファの背景の透明度である必要があります。これが私の初期化コードです：
def __init__(self,title,game_size,on_exit = sys.exit):
self.keys = [False] * 323
self.events = []
pygame.font.init()
pygame.mixer.init()
self.title = title
self.game_size = game_size
self.first_screen = (1280,720) #Take 120 pixels from the height because the menu bar, window bar and dock takes space
glutInit(sys.argv)
glutInitWindowPosition(0,0)
glutInitWindowSize(*game_size)
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA)
glutGameModeString("1280x720:32@60") #720 HD
glutCreateWindow(title)
glutSetIconTitle(title)
self.callbacks()
self.game_gap = (0,0)
self.on_exit = on_exit
self.mod_key = 1024 if sys.platform == "darwin" else 64
Surface.__init__(self,game_size)
self.screen_change = True
self.frames = [time.time()]
self.fps = 60
self.last_time = 0
self.fade_surface = Surface([1280,720])
def callbacks(self):
glutReshapeFunc(self.reshaped)
glutKeyboardFunc(self.keydown)
glutKeyboardUpFunc(self.keyup)
glutSpecialFunc(self.specialdown)
glutSpecialUpFunc(self.specialup)
glutDisplayFunc(self.game_loop)
glutIdleFunc(self.game_loop)
glutMouseFunc(self.mouse_func)
glutPassiveMotionFunc(self.mouse_move)
glViewport(0,0,self.first_screen[0],self.first_screen[1]) #Creates the viewport which is mapped to the window
glEnable(GL_BLEND) #Enable alpha blending
glEnable(GL_TEXTURE_2D) #Enable 2D Textures
glEnable(GL_POLYGON_SMOOTH) #Enable antialiased polygons
glHint(GL_POLYGON_SMOOTH_HINT, GL_NICEST)
glHint(GL_LINE_SMOOTH_HINT, GL_NICEST)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
glMatrixMode(GL_PROJECTION)
glLoadIdentity() #Load the projection matrix
gluOrtho2D(0,1280,720,0) #Set an orthorgraphic view
私は物事を機能させるために多くの調整を行い、すべてを適切に整理していないため、コードは少し厄介です。
誰かが私を助けてくれるなら、私は大いに感謝します。