Miroirs/pixelfaucet
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Remove dependence on external asset for drawing pixel text

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This commit is contained in:
Alex Clink 2022-02-04 00:00:13 -05:00
parent bddc1fe211
commit e0fe525cfa
5 changed files with 165 additions and 3 deletions
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26
scripts/extract_font.cr Normal file
View file

@ -0,0 +1,26 @@
require "../src/game"
mapping : String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789!?().,/\\[]{}$#+-“”‘’'\"@=><_"
tiles = PF::Sprite.load_tiles("assets/pf-font.png", 7, 8)
puts "CHARS = {"
tiles.each_with_index do |tile, i|
if letter = mapping[i]?
if ['\\', '\''].includes? letter
print " '\\#{letter}' => "
else
print " '#{letter}' => "
end
n = 0u64
mask = 1_u64 << (7 * 8)
tile.pixels.each do |pixel|
n |= mask if pixel >> 8 <= 127
mask >>= 1
end
puts "0x#{n.to_s(16).rjust(16, '0')}_u64,"
end
end
puts "}"

2
src/game.cr
View file

@ -18,7 +18,7 @@ module PF
property screen : Sprite
delegate :draw_point, :draw_line, :scan_line, :draw_circle, :draw_triangle, :draw_rect, :draw_shape,
:fill_triangle, :fill_rect, :fill_circle, :fill_shape, to: @screen
:fill_triangle, :fill_rect, :fill_circle, :fill_shape, :draw_string, to: @screen
@fps_lasttime : Float64 = Time.monotonic.total_milliseconds # the last recorded time.
@fps_current : UInt32 = 0 # the current FPS.

4
src/pixel.cr
View file

@ -68,6 +68,10 @@ module PF
PF::Pixel.new((@r - n).to_u8, (@g - n).to_u8, (@b - n).to_u8, @a)
end
def to_u
to_u32
end
def to_u32
value = @r.to_u32 << 24
value |= @g.to_u32 << 16

4
src/sprite.cr
View file

@ -11,8 +11,8 @@ module PF
tiles_x = sheet.width // tile_width
tiles_y = sheet.height // tile_height
0.upto(tiles_x - 1) do |tx|
0.upto(tiles_y - 1) do |ty|
0.upto(tiles_y - 1) do |ty|
0.upto(tiles_x - 1) do |tx|
sx = tx * tile_width
sy = ty * tile_height
sprite = Sprite.new(tile_width, tile_height)

132
src/sprite/draw_string.cr Normal file
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@ -0,0 +1,132 @@
module PF
class Sprite
CHARS = {
'A' => 0x007112244f912200_u64,
'B' => 0x00f1122788913c00_u64,
'C' => 0x0071120408111c00_u64,
'D' => 0x00f1122448913c00_u64,
'E' => 0x00f1020708103c00_u64,
'F' => 0x00f1020788102000_u64,
'G' => 0x0071122409911c00_u64,
'H' => 0x00891227c8912200_u64,
'I' => 0x0070408102041c00_u64,
'J' => 0x0078204081121800_u64,
'K' => 0x009122860a122400_u64,
'L' => 0x0081020408103c00_u64,
'M' => 0x0089b2a448912200_u64,
'N' => 0x008992a4c8912200_u64,
'O' => 0x0071122448911c00_u64,
'P' => 0x00f1122788102000_u64,
'Q' => 0x007112244a931e00_u64,
'R' => 0x00f112278a122200_u64,
'S' => 0x0071120380911c00_u64,
'T' => 0x00f8408102040800_u64,
'U' => 0x0089122448911c00_u64,
'V' => 0x00891224488a0800_u64,
'W' => 0x01064c9ab5512200_u64,
'X' => 0x0089114105112200_u64,
'Y' => 0x0089114102040800_u64,
'Z' => 0x00f8104104103e00_u64,
'a' => 0x0000018087121c00_u64,
'b' => 0x0081038489123800_u64,
'c' => 0x0000018488121800_u64,
'd' => 0x001021c489121c00_u64,
'e' => 0x000001848e101c00_u64,
'f' => 0x0061220708102000_u64,
'g' => 0x00000184890e0470_u64,
'h' => 0x0081038489122400_u64,
'i' => 0x0000400102040800_u64,
'j' => 0x0000200081021410_u64,
'k' => 0x008102450c142400_u64,
'l' => 0x0000810204080800_u64,
'm' => 0x000003454a912200_u64,
'n' => 0x000002468b122400_u64,
'o' => 0x0000018489121800_u64,
'p' => 0x00000184891c2040_u64,
'q' => 0x000001c4890e0408_u64,
'r' => 0x0000018488102000_u64,
's' => 0x000001c406023800_u64,
't' => 0x0040838204080800_u64,
'u' => 0x0000022448911c00_u64,
'v' => 0x00000224488a0800_u64,
'w' => 0x000002244a951400_u64,
'x' => 0x00000222820a2200_u64,
'y' => 0x00000224488f0238_u64,
'z' => 0x000003e082083e00_u64,
'0' => 0x007112654c911c00_u64,
'1' => 0x0060408102041c00_u64,
'2' => 0x0071102184103e00_u64,
'3' => 0x0071102180911c00_u64,
'4' => 0x00891223c0810200_u64,
'5' => 0x00f9020780911c00_u64,
'6' => 0x0071120788911c00_u64,
'7' => 0x00f8104104081000_u64,
'8' => 0x0071122388911c00_u64,
'9' => 0x00711223c0911c00_u64,
'!' => 0x0020408102000800_u64,
'?' => 0x0071122182000800_u64,
'(' => 0x0020810204080800_u64,
')' => 0x0040408102041000_u64,
'.' => 0x0000000000000800_u64,
',' => 0x0000000000000410_u64,
'/' => 0x0010408204102000_u64,
'\\' => 0x0080810102020400_u64,
'[' => 0x00c1020408103000_u64,
']' => 0x00c0810204083000_u64,
'{' => 0x0060810404081800_u64,
'}' => 0x00c0810104083000_u64,
'$' => 0x0020f283829e0800_u64,
'#' => 0x0050a3e28f8a1400_u64,
'+' => 0x00004087c2040000_u64,
'-' => 0x00000007c0000000_u64,
'“' => 0x0041228100000000_u64,
'”' => 0x0021214200000000_u64,
'‘' => 0x0041020000000000_u64,
'’' => 0x0080810000000000_u64,
'\'' => 0x0040810000000000_u64,
'"' => 0x00a1428000000000_u64,
'@' => 0x007112e54b901e00_u64,
'=' => 0x000003e00f800000_u64,
'>' => 0x0040404041041000_u64,
'<' => 0x0008208202020200_u64,
'_' => 0x0000000000003e00_u64,
}
CHAR_WIDTH = 7
CHAR_HEIGHT = 8
def draw_string(msg : String, x : Int, y : Int, color : Pixel = Pixel.black, bg : Pixel? = nil)
cur_y = 0
cur_x = 0
leading = 0
msg.chars.each do |c|
if c == '\n'
cur_y += 1
cur_x = 0
next
end
if char = CHARS[c]?
mask = 1_u64 << (CHAR_WIDTH * CHAR_HEIGHT)
0.upto(CHAR_HEIGHT - 1) do |cy|
0.upto(CHAR_WIDTH - 1) do |cx|
if mask & char > 0
draw_point(x + cx + (cur_x * CHAR_WIDTH), y + cy + (cur_y * (CHAR_HEIGHT + leading)), color)
elsif background = bg
draw_point(x + cx + (cur_x * CHAR_WIDTH), y + cy + (cur_y * (CHAR_HEIGHT + leading)), background)
end
mask >>= 1
end
end
end
cur_x += 1
end
end
def draw_string(msg : String, pos : Vector2(Int), color : Pixel = Pixel.black)
draw_string(msg, pos.x, pos.y, color)
end
end
end