monorail
/
Archipelago
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Improve performance by creating in-memory gifs

This commit is contained in:
Kevin Cathcart 2017-12-07 19:44:08 -05:00
parent 1d223dc0b8
commit 5dbc21ce3a
1 changed files with 93 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

118
Gui.py
View File

@ -393,38 +393,106 @@ class SpriteSelector(object):
def local_unofficial_sprite_dir(site): def local_unofficial_sprite_dir(site):
return local_path("data/sprites/unofficial") return local_path("data/sprites/unofficial")
def get_image_for_sprite(filename): def get_image_for_sprite(filename):
sprite = Sprite(filename) sprite = Sprite(filename)
image = PhotoImage(height=24, width=16, palette="256/256/256") if not sprite.valid:
return None
height = 24
width = 16
def color_to_hex(color): def draw_sprite_into_gif(add_palette_color, set_pixel_color_index):
return "#{0:02X}{1:02X}{2:02X}".format(*color)
def drawsprite(spr, pal_as_colors, offset): def drawsprite(spr, pal_as_colors, offset):
for y in range(len(spr)): for y in range(len(spr)):
for x in range(len(spr[y])): for x in range(len(spr[y])):
pal_index = spr[y][x] pal_index = spr[y][x]
if pal_index: if pal_index:
color = pal_as_colors[pal_index - 1] color = pal_as_colors[pal_index - 1]
image.put(color_to_hex(color), to=(x + offset[0], y + offset[1])) set_pixel_color_index(x + offset[0], y + offset[1], color)
shadow_palette = [(40, 40, 40)] add_palette_color(16, (40, 40, 40))
shadow = [ shadow = [
[0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0], [0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0],
[0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0], [0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0],
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
[0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0], [0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0],
[0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0], [0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0],
] ]
drawsprite(shadow, shadow_palette, (2, 17)) drawsprite(shadow, [16], (2, 17))
palettes = sprite.decode_palette() palettes = sprite.decode_palette()
body = sprite.decode16(0x4C0) for i in range(15):
drawsprite(body, palettes[0], (0, 8)) add_palette_color(i + 1, palettes[0][i])
head = sprite.decode16(0x40)
drawsprite(head, palettes[0], (0, 0)) body = sprite.decode16(0x4C0)
drawsprite(body, list(range(1, 16)), (0, 8))
head = sprite.decode16(0x40)
drawsprite(head, list(range(1, 16)), (0, 0))
def make_gif(callback):
gif_header = b'GIF89a'
gif_lsd = bytearray(7)
gif_lsd[0] = width
gif_lsd[2] = height
gif_lsd[4] = 0xF4 # 32 color palette follows. transparant + 15 for sprite + 1 for shadow=17 which rounds up to 32 as nearest power of 2
gif_lsd[5] = 0 # background color is zero
gif_lsd[6] = 0 # aspect raio not specified
gif_gct = bytearray(3 * 32)
gif_gce = bytearray(8)
gif_gce[0] = 0x21 # start of extention blocked
gif_gce[1] = 0xF9 # identifies this as the Graphics Control extension
gif_gce[2] = 4 # we are suppling only the 4 four bytes
gif_gce[3] = 0x01 # this gif includes transparency
gif_gce[4] = gif_gce[5] = 0 # animation frrame delay (unused)
gif_gce[6] = 0 # transparent color is index 0
gif_gce[7] = 0 # end of gif_gce
gif_id = bytearray(10)
gif_id[0] = 0x2c
# byte 1,2 are image left. 3,4 are image top both are left as zerosuitsamus
gif_id[5] = width
gif_id[7] = height
gif_id[9] = 0 # no local color table
gif_img_minimum_code_size = bytes([7]) # we choose 7 bits, so that each pixel is represented by a byte, for conviennce.
clear = 0x80
stop = 0x81
unchunked_image_data = bytearray(height * (width + 1) + 1)
# we technically need a Clear code once every 125 bytes, but we do it at the start of every row for simplicity
for row in range(height):
unchunked_image_data[row * (width + 1)] = clear
unchunked_image_data[-1] = stop
def add_palette_color(index, color):
gif_gct[3 * index] = color[0]
gif_gct[3 * index + 1] = color[1]
gif_gct[3 * index + 2] = color[2]
def set_pixel_color_index(x, y, color):
unchunked_image_data[y * (width + 1) + x + 1] = color
callback(add_palette_color, set_pixel_color_index)
def chunk_image(img):
for i in range(0, len(img), 255):
chunk = img[i:i + 255]
yield bytes([len(chunk)])
yield chunk
gif_img = b''.join([gif_img_minimum_code_size] + list(chunk_image(unchunked_image_data)) + [b'\x00'])
gif = b''.join([gif_header, gif_lsd, gif_gct, gif_gce, gif_id, gif_img, b'\x3b'])
return gif
gif_data = make_gif(draw_sprite_into_gif)
image = PhotoImage(data=gif_data)
return image.zoom(2) return image.zoom(2)