core_decoder/main.py

import os
os.environ['PYGAME_HIDE_SUPPORT_PROMPT'] = "hide"
import textwrap
from pprint import pprint, pformat
import sys
import pygame
from functools import partial
from itertools import starmap
import time

from holly import decode_holly
from region_array import decode_region_array_entries
from object_list import *
from isp_tsp_parameter import parse_parameter

texture_memory_filename = sys.argv[1]
holly_registers_filename = sys.argv[2]

with open(texture_memory_filename, "rb") as f:
    texture_memory = memoryview(f.read())

with open(holly_registers_filename, "rb") as f:
    holly_registers = memoryview(f.read())

holly = decode_holly(holly_registers)

assert (holly.REGION_BASE & 0b11) == 0, holly.REGION_BASE

region_array_entries = decode_region_array_entries(texture_memory, holly.REGION_BASE)

DEBUG = True

def walk_region_array(*, tile_callback=None, parameter_callback=None, flush_callback=None):
    for entry in region_array_entries:
        if DEBUG:
            print(entry.tile)
        lists = [
            ("opaque_list_pointer", entry.opaque_list_pointer),
            ("opaque_modifier_volume_list_pointer", entry.opaque_modifier_volume_list_pointer),
            ("translucent_list_pointer", entry.translucent_list_pointer),
            ("translucent_modifier_volume_list_pointer", entry.translucent_modifier_volume_list_pointer),
            ("punch_through_list_pointer", entry.punch_through_list_pointer),
        ]
        if tile_callback is not None:
            tile_callback(entry.tile)

        for list_type_name, list_pointer in lists:
            if DEBUG:
                print(" " * 4, end='')
                print(list_type_name, list_pointer)
            if list_pointer.empty_ptr:
                continue
            offset = list_pointer.pointer_to_object_list
            while True:
                ol_entry = decode_ol_entry(texture_memory, offset)
                if DEBUG:
                    print(" " * 8, end='')
                    print(ol_entry)
                offset += 4
                if type(ol_entry) == triangle_array:
                    param_offset = holly.PARAM_BASE + ol_entry.triangle_array_start
                    for i in range(ol_entry.number_of_triangles + 1):
                        modifier_volume = list_type_name in {"opaque_modifier_volume_list_pointer", "translucent_modifier_volume_list_pointer"}
                        param_offset, parameter = parse_parameter(texture_memory, param_offset,
                                                                  skip=ol_entry.skip,
                                                                  shadow=ol_entry.shadow,
                                                                  tag_offset=0,
                                                                  vertex_count=3,
                                                                  modifier_volume=modifier_volume)
                        if parameter_callback is not None:
                            parameter_callback(entry.tile, list_type_name, list_pointer, ol_entry, parameter)

                        if DEBUG:
                            print(textwrap.indent(
                                pformat(parameter),
                                " " * 12
                            ))

                if type(ol_entry) == object_pointer_block_link:
                    if ol_entry.end_of_list:
                        break
                    else:
                        offset = ol_entry.next_pointer_block

        if entry.tile.flush_accumulate == 0:
            if flush_callback is not None:
                flush_callback(entry.tile)

def new_tile_surface():
    surface = pygame.Surface((32, 32))
    surface.fill((0, 0, 0, 0))
    return surface

x_tiles = (640 // 32)
y_tiles = (480 // 32)

primary_buffer = None

def draw_background(tile):
    t = holly.ISP_BACKGND_T
    skip = (t >> 24) & 0b111
    tag_address = ((t >> 3) & 0x1fffff) * 4
    parameter_address = tag_address + holly.PARAM_BASE

    param_offset, parameter = parse_parameter(texture_memory, parameter_address,
                                              skip=skip,
                                              shadow=0,
                                              tag_offset=0,
                                              vertex_count=3,
                                              modifier_volume=False)
    assert len(parameter.vertices) == 3, parameter.vertices
    assert len(parameter.vertices[0].attributes) >= 1, parameter
    argb_color = parameter.vertices[0].attributes[0]
    alpha = (argb_color >> 24) & 0xff
    red = (argb_color >> 16) & 0xff
    green = (argb_color >> 8) & 0xff
    blue = (argb_color >> 0) & 0xff
    color = (red, green, blue, alpha)

    points = [(0, 0), (640, 0), (640, 480), (0, 480)]

    global primary_buffer
    pygame.draw.polygon(primary_buffer, color, points)

def tile_callback(tile):
    draw_background(tile)

def flush_callback(tile, *, screen):
    global primary_buffer
    screen.blit(primary_buffer, (tile.tile_x_position * 32, tile.tile_y_position * 32))
    pygame.display.flip()

def parameter_callback(tile, list_type_name, list_pointer, ol_entry, parameter):
    left = tile.tile_x_position * 32
    top = tile.tile_y_position * 32

    assert type(ol_entry) == triangle_array, ol_entry
    assert len(parameter.vertices) == 3, parameter.vertices

    if list_type_name in {"opaque_modifier_volume_list_pointer", "translucent_modifier_volume_list_pointer"}:
        argb_color = 0x00000000
        return
    else:
        assert len(parameter.vertices[0].attributes) >= 1, parameter
        argb_color = parameter.vertices[0].attributes[0]

    points = [
        (vertex.x - left, vertex.y - top)
        for vertex in parameter.vertices
    ]

    alpha = (argb_color >> 24) & 0xff
    red = (argb_color >> 16) & 0xff
    green = (argb_color >> 8) & 0xff
    blue = (argb_color >> 0) & 0xff
    color = (red, green, blue)

    pygame.draw.polygon(primary_buffer, color, points)

def main():
    walk_region_array(tile_callback=None,
                      parameter_callback=None,
                      flush_callback=None)

def draw():
    pygame.init()
    screen = pygame.display.set_mode((640, 480))

    global primary_buffer
    primary_buffer = new_tile_surface()

    #sys.stdin.readline()

    walk_region_array(tile_callback=tile_callback,
                      parameter_callback=parameter_callback,
                      flush_callback=partial(flush_callback, screen=screen))

    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                break

    pygame.quit()

#main()
draw()