def scale_tilemap(tilemap, camera=(0, 0), scale=1, **kwargs):
'''
WIP smooth scaling tilemap renderer
Still haven't gotten this working properly
'''
return
global buffer
global printfo
renderer = tilemap.images[1].texture.renderer
old_viewport = renderer.get_viewport()
old_target = renderer.target
rend_width, rend_height = renderer.target.get_rect().size if \
renderer.target else old_viewport.size
if not buffer:
renderer.set_viewport(None)
size = renderer.get_viewport().size
buffer = Texture(renderer, size, target=True)
buffer.blend_mode = 1
renderer.target = buffer
renderer.clear()
rendered_rect = renderer.get_viewport()
if scale > 1:
wanted_rect = scale_rect(rendered_rect, 1 / scale)
src_rect = wanted_rect
scale = 1
elif scale < 1:
pass
elif scale < 1:
actual_scale = max(scale, .5)
scale = 0.5
rect_scale = scale / actual_scale
wanted_rect = scale_rect(rendered_rect, rect_scale)
src_rect = wanted_rect
printfo = (f'actual={actual_scale}, set={scale}, rect={rect_scale}, '
'rect={src_rect}')
elif False:
tiles_wide = math.ceil(rend_width / (scale * tilemap.tilewidth))
adjusted_scale = (rend_width / tilemap.tilewidth) / tiles_wide
buffer_scale = 1 - (scale - adjusted_scale)
printfo = (f'base= {rend_width/tilemap.tilewidth}, tiles wide='
'{tiles_wide}, new_scale={buffer_scale}')
wanted_rect = scale_rect(rendered_rect, buffer_scale)
src_rect = wanted_rect
src_rect.center = rendered_rect.center
scale = adjusted_scale
else:
src_rect = rendered_rect
if True: # center
cam_x = (camera.x * scale) - (rend_width / 2)
cam_y = (camera.y * scale) - (rend_height / 2)
else:
cam_x = camera.x * scale
cam_y = camera.y * scale
cell_count = len(tilemap.images)
tile_w = int(tilemap.tilewidth * scale)
tile_h = int(tilemap.tileheight * scale)
cells_wide = rend_width // tile_w + 2
cells_high = rend_height // tile_h + 2
start_cellx, offset_x = divmod(int(cam_x), tile_w)
start_celly, offset_y = divmod(int(cam_y), tile_h)
offset_x = 0
offset_y = 0
percent = offset_x / tile_w
if start_cellx < 0: # Handle negative values
offset_x += start_cellx * tile_w
start_cellx = 0
if start_celly < 0:
offset_y += start_celly * tile_h
start_celly = 0
dest_rect = pg.Rect(0, 0, tile_w, tile_h)
layer = tilemap.layers[0].data
'''
Render Tilemap
'''
for row in layer[start_celly:start_celly + cells_high]:
for frame in row[start_cellx:start_cellx + cells_wide]:
if frame > 0:
tilemap.images[frame].draw(dstrect=dest_rect)
dest_rect.x += tile_w
dest_rect.y += tile_h
dest_rect.x = 0
renderer.target = old_target
buffer.draw(srcrect=src_rect)
'''
Cleanup
'''
return cam_x, cam_y, scale
def sprites():
pg.init()
clock = pg.time.Clock()
window = Window("Renderpyg Example", size=WINDOW_RESOLUTION)
renderer = Renderer(window, vsync=True)
"""
We will draw into a buffer texture to allow easy resolution changes
It will also make it easier to apply screen transitions and similar effects later
When using pygame._sdl2.video you do not call pygame.display.setmode()
Therefore calling surface.convert() or surface.convert_alpha() will throw an error
When you create a Texture that needs alpha blending you must set its blend mode
Alpha blending will be set automatically when loading from an image with transparency, such as PNG
Remember to use the buffer size instead of the window size when drawing onto the offscreen buffer
This will allow you to scale the screen to any window or fullscreen desktop size
"""
buffer = Texture(renderer, RENDER_RESOLUTION, target=True)
buffer.blend_mode = 1
screensize = buffer.get_rect()
"""
You can set fullscreen when creating the window by using Window(title, size, desktop_fullscreen=True)
I prefer creating a window before going to fullscreen to avoid strange window placement that occurs
if you exit fullscreen later on.
"""
FULLSCREEN = False
if FULLSCREEN:
window.set_fullscreen(True)
"""
Font features in pygame are design for blitting to a surface, not for GPU rendering
It is possible to create a streaming texture and then using texture.update() to update the texture
from a pygame surface, but accessing GPU memory is slow and this should be done sparingly.
Therefore I created a simple TextureFont class. We will use the animation feature of this class
for a little extra fun. We will also create some sprites and let them animate too.
Also, for this example we use a Character class to move and rotate individual characters across
the screen. This is very similar to how you will handle sprites later.
"""
tfont = TextureFont(renderer, FONT, FONT_SIZE)
sprite = Sprite((renderer, EXAMPLE_DATA + 'aliens.png'),
7,
8,
by_count=True)
group = pg.sprite.Group()
animations = [
keyrange(0, 7, 200),
keyrange(7, 14, 200),
keyrange(14, 21, 200),
keyrange(28, 35, 200)
]
for _ in range(SPRITE_COUNT):
spr = Sprite(sprite.images)
spr.set_pos(randrange(0, RENDER_RESOLUTION[0]),
randrange(0, RENDER_RESOLUTION[1]))
spr.set_animation(random.choice(animations), -1)
spr.velocity = pg.Vector2(randrange(-10, 11), randrange(-10, 11))
if randrange(10) < 2:
spr.rotation = randrange(-10, 11)
group.add(spr)
"""
Here starts a simple game loop
Press SPACE to toggle between a large window, a small window, and fullscreen
Press ENTER to add more characters to the screen
At the beginning of each frame we must set the renderer target to our buffer Texture
All the following draw calls will be drawn to the buffer instead of the screen
After all of our drawing, we reset the target and draw the buffer onto the screen
"""
timer = pg.time.get_ticks()
delta = 0
running = True
while running:
renderer.target = buffer
for event in pg.event.get():
if event.type == pg.QUIT:
running = False
elif event.type == pg.KEYDOWN:
if event.key == pg.K_ESCAPE:
running = False
elif event.key == pg.K_SPACE:
if FULLSCREEN:
FULLSCREEN = False
window.size = WINDOW_RESOLUTION
window.set_windowed()
elif window.size == WINDOW_RESOLUTION:
window.size = SMALL_RESOLUTION
else:
FULLSCREEN = True
window.size = WINDOW_RESOLUTION
window.set_fullscreen(True)
#Must set the draw color before clearing the scren or drawing lines and rectt
renderer.draw_color = (0, 0, 0, 255)
renderer.clear()
"""
Draw the background image if available.
By default Texture.draw() will fill the renderer unless you supply a destination Rect
texture.draw( dstrect=Rect(x, y, width, height) )
"""
group.update(delta)
group.draw()
tfont.animate(**FONT_PARAMS)
# Setting renderer.target = None will make following draw calls render to the underlying window
# Since we don't provide a dstrect it will fill the renderer
renderer.target = None
buffer.draw()
renderer.present(
) # all draw calls occur and the screen is updated here
delta = clock.tick(FRAMES_PER_SECOND)
def render_tilemap(tilemap, camera=(0, 0), scale=1, **kwargs):
'''
Draw pytmx or inbuilt tilemap onto pygame GPU renderer
:param tilemap: pytmx or internal tilemap class
:param camera: pg.Vector2 for top left camera location
:param scale: float scale value defaults to 1.0
:param center: pg.Vector2 to set center camera location
True to adjust camera for center
Overides camera
:param srcrect: area to render in world coordinates overides scale
Ignores height to maintain aspect ratio
:param dstrect: screen area to render into
defaults to entire renderer area
:param smooth: for smoother scaling transition but less accurate
:param clamp: True to adjust camera to fit world coordinates
:rvalue (camx, camy, scale): for adjusting other images
TODO:
impliment smoothing
'''
'''
Setup renderer and viewport
'''
global buffer
renderer = tilemap.images[1].texture.renderer
old_viewport = renderer.get_viewport()
old_target = renderer.target
rend_width, rend_height = renderer.target.get_rect().size if\
renderer.target else old_viewport.size
'''
Parse options
'''
smooth = kwargs.get('smooth', False)
clamp = kwargs.get('clamp', False)
cam_x = int(camera.x)
cam_y = int(camera.y)
if smooth and scale != 1:
if not buffer:
renderer.set_viewport(None)
size = renderer.get_viewport().size
buffer = Texture(renderer, size, target=True)
buffer.blend_mode = 1
renderer.target = buffer
renderer.clear()
dstrect = kwargs.get('dstrect', None)
try:
if dstrect:
if not hasattr(dstrect, 'width'):
dstrect = pg.Rect(*dstrect)
renderer.set_viewport(dstrect)
rend_width = dstrect.width
rend_height = dstrect.height
except:
raise ValueError(
'render_tilemap() cannot parse "{}" as dest_rect'.format(dstrect))
srcrect = kwargs.get('srcrect', None)
try:
if hasattr(srcrect, 'width'):
renderer.set_viewport(srcrect)
camera = srcrect.pos
scale = rend_width / srcrect.width
center = False
elif srcrect:
srcrect = pg.Rect(srcrect)
except:
raise ValueError(
'render_tilemap() cannot parse "{}" as src_rect'.format(dstrect))
center = kwargs.get('center', False)
try:
if center and center != True:
cam_x = int(center[0])
cam_y = int(center[1])
center = True
except:
raise ValueError(
'render_tilemap() cannot parse "{}" as center pos'.format(center))
if center:
cam_x = (cam_x * scale) - (rend_width / 2)
cam_y = (cam_y * scale) - (rend_height / 2)
else:
cam_x = cam_x * scale
cam_y = cam_y * scale
'''
Prepare to render the tilemap
'''
cell_count = len(tilemap.images)
tile_w = int(tilemap.tilewidth * scale)
tile_h = int(tilemap.tileheight * scale)
cells_wide = rend_width // tile_w + 2
cells_high = rend_height // tile_h + 2
if clamp:
cam_x = min(max(0, cam_x), tile_w * tilemap.width - rend_width)
cam_y = min(max(0, cam_y), tile_h * tilemap.height - rend_height)
start_cellx, offset_x = divmod(int(cam_x), tile_w)
start_celly, offset_y = divmod(int(cam_y), tile_h)
if start_cellx < 0: # Handle negative values
offset_x += start_cellx * tile_w
start_cellx = 0
if start_celly < 0:
offset_y += start_celly * tile_h
start_celly = 0
dest_rect = pg.Rect(-offset_x, -offset_y, tile_w, tile_h)
layer = tilemap.layers[0].data
'''
Render Tilemap
'''
for row in layer[start_celly:start_celly + cells_high]:
for frame in row[start_cellx:start_cellx + cells_wide]:
if frame > 0:
tilemap.images[frame].draw(dstrect=dest_rect)
dest_rect.x += tile_w
dest_rect.y += tile_h
dest_rect.x = -offset_x
if smooth and scale != 1:
renderer.target = old_target
dest_rect.x = 0
dest_rect.y = 0
dest_rect.width = (tilemap.tilewidth * scale) * (rend_width //
tilemap.tilewidth)
dest_rect.height = (tilemap.tileheight * scale) * (rend_height //
tilemap.tileheight)
global printfo
printfo = f'{dest_rect}, {tilemap.tilewidth*scale}, {cells_wide-2}'
buffer.draw(srcrect=dest_rect)
'''
Cleanup
'''
return cam_x, cam_y, scale