initial coordinator

src/groovylight/gamma.py

@@ -1,52 +0,0 @@
-# Gamma correction by adjusting the display OE/Expose timings.
-
-
-# Most gamma correction is done on the values being displayed.
-# i.e gammacorrect (RGB) -> RGB (adjusted). However this adds
-# a complex look-up step which adds complexity and cycles.
-# There is a simpler solution which uses some properties of the
-# gamma function as well as the fact that we are manually doing
-# color depth using BCM/PWM.
-#
-# Consider the default BCM timing layout:
-# MSB  MSB-1  MSB-2  MSB-3
-# P*8    P*4    P*2   P
-# that is, we have a baseline display, measured in clocks/us/whatever
-# and then the next most significant bit is displayed for twice that,
-# four times that, and so on.
-# But, we can adjust the individual bit timings to adjust the brightness
-# curve as we see fit. This has numerous advantages:
-# 1. It's free, we don't have to do any math on the board, just adjusting
-#    an existing process.
-# 2. We can go more granular that n-bits of color. This means that the gamma
-#    curve will be effective and accurate regardless of the color depth.
-#
-# This file contains code to generate these timing adjustments and 
-# control/quantify them.
-
-from math import pow
-
-
-
-def _gammavec(vals: [float], g: float) -> [float]:
-    return [pow(x,g) for x in vals]
-
-def _nbit_scale(f, nbits:int) -> [float]:
-    """Computes the equivalent linear value for each bit of n_bits.
-    That is, the list contains scalar values that are doubling as they progress,
-    [ x, 2x, 4x ] such that the sum(list) = 7x = f
-    """
-    base = float(f) / (pow(2.0, nbits) - 1.0)
-    return [base * pow(2.0, x) for x in range(nbits)]
-
-
-def gamma_timings(gamma:float = 2.2, nbits:int = 8, max_clocks: int = 4096):
-    """Computes the clock cycle timings for a given gamma correction.
-    """
-    linear_values = _nbit_scale(1.0, nbits)
-    gamma_values = _gammavec(linear_values, gamma)
-
-    bclk_ratio = max_clocks / gamma_values[-1]
-    result = [round(bclk_ratio * x) for x in gamma_values]
-    return result
-

src/groovylight/geom.py

@@ -3,11 +3,9 @@
 
 from enum import Enum
 from dataclasses import dataclass
-from typing import Self
-from math import ceil, log2
 
 
-@dataclass(frozen=True)
+@dataclass(frozen=True, order=True)
 class Coord:
     """Coordinate class. Uses computer-graphics standard coordinate system,
     where X=0, Y=0 is top left. +X goes right. +Y goes down.
@@ -20,24 +18,6 @@ class Coord:
         if self.x < 0 or self.y < 0:
             raise RuntimeError("x and y must both be >= 0")
 
-    def __lt__(self, other):
-        return self.x < other.x and self.y < other.y
-
-    def __gt__(self, other):
-        return self.x > other.x and self.y > other.y
-
-    def __eq__(self, other):
-        return self.x == other.x and self.y == other.y
-
-    def __neq__(self, other):
-        return not (self.x == other.x and self.y == other.y)
-
-    def __le__(self, other):
-        return self.x <= other.x and self.y <= other.y
-
-    def __ge__(self, other):
-        return self.x >= other.x and self.y >= other.y
-
 
 @dataclass(frozen=True)
 class BBox:
@@ -52,27 +32,7 @@ class BBox:
             raise RuntimeError("topleft must be strictly less than bottomright")
 
     def contains(self, c: Coord) -> bool:
-        return c >= self.topleft and c <= self.bottomright
+        return c > self.topleft and c < self.bottomright
-
-    @property
-    def width(self) -> int:
-        return self.bottomright.x - self.topleft.x
-
-    @property
-    def height(self) -> int:
-        return self.bottomright.y - self.topleft.y
-
-    def intersects(self, other: Self) -> bool:
-        ## other leftmost edge is right of our rightmost edge
-        x1 = other.topleft.x > self.bottomright.x
-        # our leftmost edge is to the right of other rightmost edge
-        x2 = self.topleft.x > other.bottomright.x
-        # other top edge is below (greater than!) our bottom edge
-        y1 = other.topleft.y > self.bottomright.y
-        # our top edge is below other bottom edge.
-        y2 = self.topleft.y > other.bottomright.y
-
-        return not (x1 or x2 or y1 or y2)
 
 
 @dataclass(frozen=True)
@@ -84,10 +44,6 @@ class DisplayDimensions:
 
     length: int
     height: int
-    mux: int = 2  # number of lines driven at once.
-
-    def addr_bits(self) -> int:
-        return ceil(log2(self.height / self.mux))
 
 
 class DisplayRotation(Enum):
@@ -112,7 +68,7 @@ class DisplayRotation(Enum):
 
 
 @dataclass(frozen=True)
-class DisplayString:
+class _DisplayString:
     """Internal class to represent a string of HUB75 displays.
 
     position: (X,Y) coordinates of the local top-left of the display
@@ -125,7 +81,6 @@ class DisplayString:
     position: Coord
     dimensions: DisplayDimensions
     rotation: DisplayRotation
-    # TODO: encode muxing
 
     @property
     def bbox(self) -> BBox:
@@ -148,13 +103,10 @@ class DisplayString:
         """Checks if the given coordinate is inside this display."""
         return self.bbox.contains(coord)
 
-    def intersects(self, box: BBox) -> bool:
-        """Checks if the given BBox intersects with this display"""
-        return self.bbox.intersects(box)
-
 
 class DisplayGeometry:
-    """Represents a display based on several strings in different positions."""
+    """Represents a display based on several strings in different positions.
+    """
 
     def __init__(self, *, strict: bool = False):
         self.strict = strict

src/groovylight/test_hub75.py

@@ -5,7 +5,7 @@ from amaranth.lib.wiring import In, Out
 from amaranth.lib.memory import Memory, WritePort
 from amaranth.sim import Simulator
 
-from ..bitslicer import Hub75StringDriver, Rgb666Layout
+from .bitslicer import Hub75StringDriver, Rgb666Layout
 
 
 def test_stringdriver():

src/groovylight/test_swapbuffer.py

@@ -5,7 +5,7 @@ from amaranth.lib.wiring import In, Out
 from amaranth.lib.memory import Memory, WritePort
 from amaranth.sim import Simulator
 
-from ..bitslicer import Hub75StringDriver, Rgb666Layout, SwapBuffer
+from .bitslicer import Hub75StringDriver, Rgb666Layout, SwapBuffer
 
 
 def test_swapbuffer():

src/groovylight/tests/test_geom.py

@@ -1,32 +0,0 @@
-from ..geom import Coord, BBox
-
-import pytest
-
-def test_coord_comparison():
-    c1 = Coord(0,0)
-    c2 = Coord(0,1)
-    c3 = Coord(1,1)
-    c3_other = Coord(1,1)
-
-    assert c1 < c3
-    assert not c1 < c2, "both x,y must be greater/lt/eq"
-    assert c2 <= c3
-
-    assert c3 == c3_other, "Coords with same numbers should equal each other"
-    assert c3 != c2
-
-def test_coord_construction():
-    with pytest.raises(RuntimeError):
-        Coord(0,-1)
-
-
-def test_bbox():
-    b = BBox(Coord(1,1), Coord(3,2))
-
-    assert b.width == 2
-    assert b.height == 1
-
-    assert b.contains(Coord(1,2))
-    assert not b.contains(Coord(0,0))
-    
-    # TODO: test .intersect(other)