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gengrid.py
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PDF_FILE_TEMPLATE = """
%PDF-1.6
% Root
1 0 obj
<<
/AcroForm <<
/Fields [ ###FIELD_LIST### ]
>>
/Pages 2 0 R
/OpenAction 17 0 R
/Type /Catalog
>>
endobj
2 0 obj
<<
/Count 1
/Kids [
16 0 R
]
/Type /Pages
>>
%% Annots Page 1 (also used as overall fields list)
21 0 obj
[
###FIELD_LIST###
]
endobj
###FIELDS###
%% Page 1
16 0 obj
<<
/Annots 21 0 R
/Contents 3 0 R
/CropBox [
0.0
0.0
612.0
792.0
]
/MediaBox [
0.0
0.0
612.0
792.0
]
/Parent 2 0 R
/Resources <<
>>
/Rotate 0
/Type /Page
>>
endobj
3 0 obj
<< >>
stream
endstream
endobj
17 0 obj
<<
/JS 42 0 R
/S /JavaScript
>>
endobj
42 0 obj
<< >>
stream
// Hacky wrapper to work with a callback instead of a string
function setInterval(cb, ms) {
evalStr = "(" + cb.toString() + ")();";
return app.setInterval(evalStr, ms);
}
// https://gist.github.com/blixt/f17b47c62508be59987b
var rand_seed = Date.now() % 2147483647;
function rand() {
return rand_seed = rand_seed * 16807 % 2147483647;
}
// nr of unique rotations per piece
var piece_rotations = [1, 2, 2, 2, 4, 4, 4];
// Piece data: [piece_nr * 32 + rot_nr * 8 + brick_nr * 2 + j]
// with rot_nr between 0 and 4
// with the brick number between 0 and 4
// and j == 0 for X coord, j == 1 for Y coord
var piece_data = [
// square block
0, 0, -1, 0, -1, -1, 0, -1,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
// line block
0, 0, -2, 0, -1, 0, 1, 0,
0, 0, 0, 1, 0, -1, 0, -2,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
// S-block
0, 0, -1, -1, 0, -1, 1, 0,
0, 0, 0, 1, 1, 0, 1, -1,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
// Z-block
0, 0, -1, 0, 0, -1, 1, -1,
0, 0, 1, 1, 1, 0, 0, -1,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
// L-block
0, 0, -1, 0, -1, -1, 1, 0,
0, 0, 0, 1, 0, -1, 1, -1,
0, 0, -1, 0, 1, 0, 1, 1,
0, 0, -1, 1, 0, 1, 0, -1,
// J-block
0, 0, -1, 0, 1, 0, 1, -1,
0, 0, 0, 1, 0, -1, 1, 1,
0, 0, -1, 1, -1, 0, 1, 0,
0, 0, 0, 1, 0, -1, -1, -1,
// T-block
0, 0, -1, 0, 0, -1, 1, 0,
0, 0, 0, 1, 0, -1, 1, 0,
0, 0, -1, 0, 0, 1, 1, 0,
0, 0, -1, 0, 0, 1, 0, -1
]
var TICK_INTERVAL = 50;
var GAME_STEP_TIME = 400;
// Globals
var pixel_fields = [];
var field = [];
var score = 0;
var time_ms = 0;
var last_update = 0;
var interval = 0;
// Current piece
var piece_type = rand() % 7;
var piece_x = 0;
var piece_y = 0;
var piece_rot = 0;
function spawn_new_piece() {
piece_type = rand() % 7;
piece_x = 4;
piece_y = 0;
piece_rot = 0;
}
function set_controls_visibility(state) {
this.getField("T_input").hidden = !state;
this.getField("B_left").hidden = !state;
this.getField("B_right").hidden = !state;
this.getField("B_down").hidden = !state;
this.getField("B_rotate").hidden = !state;
}
function game_init() {
spawn_new_piece();
// Gather references to pixel field objects
// and initialize game state
for (var x = 0; x < ###GRID_WIDTH###; ++x) {
pixel_fields[x] = [];
field[x] = [];
for (var y = 0; y < ###GRID_HEIGHT###; ++y) {
pixel_fields[x][y] = this.getField(`P_${x}_${y}`);
field[x][y] = 0;
}
}
last_update = time_ms;
score = 0;
// Start timer
interval = setInterval(game_tick, TICK_INTERVAL);
// Hide start button
this.getField("B_start").hidden = true;
// Show input box and controls
set_controls_visibility(true);
}
function game_update() {
if (time_ms - last_update >= GAME_STEP_TIME) {
lower_piece();
last_update = time_ms;
}
}
function game_over() {
app.clearInterval(interval);
app.alert(`Game over! Score: ${score}\nRefresh to restart.`);
}
function rotate_piece() {
piece_rot++;
if (piece_rot >= piece_rotations[piece_type]) {
piece_rot = 0;
}
// If we're now out of bounds, undo the rotation
var illegal = false;
for (var square = 0; square < 4; ++square) {
var x_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 0];
var y_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 1];
var abs_x = piece_x + x_off;
var abs_y = piece_y + y_off;
if (abs_x < 0 || abs_y < 0 || abs_x >= ###GRID_WIDTH### || abs_y >= ###GRID_HEIGHT###) {
illegal = true;
break;
}
}
if (illegal) {
piece_rot--;
if (piece_rot < 0) {
piece_rot = piece_rotations[piece_type] - 1;
}
}
}
function is_side_collision() {
for (var square = 0; square < 4; ++square) {
var x_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 0];
var y_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 1];
var abs_x = piece_x + x_off;
var abs_y = piece_y + y_off;
// collision with walls
if (abs_x < 0 || abs_x >= ###GRID_WIDTH###) {
return true;
}
// collision with field blocks
if (field[abs_x][abs_y]) {
return true;
}
}
return false;
}
function handle_input(event) {
switch (event.change) {
case 'w': rotate_piece(); break;
case 'a': move_left(); break;
case 'd': move_right(); break;
case 's': lower_piece(); break;
}
}
function move_left() {
piece_x--;
if (is_side_collision()) {
piece_x++;
}
}
function move_right() {
piece_x++;
if (is_side_collision()) {
piece_x--;
}
}
function check_for_filled_lines() {
for (var row = 0; row < ###GRID_HEIGHT###; ++row) {
var fill_count = 0;
for (var column = 0; column < ###GRID_WIDTH###; ++column) {
fill_count += field[column][row];
}
if (fill_count == ###GRID_WIDTH###) {
// increase score
score++;
draw_updated_score();
// remove line (shift down)
for (var row2 = row; row2 > 0; row2--) {
for (var column2 = 0; column2 < ###GRID_WIDTH###; ++column2) {
field[column2][row2] = field[column2][row2-1];
}
}
}
}
}
function lower_piece() {
piece_y++;
var collision = false;
for (var square = 0; square < 4; ++square) {
var x_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 0];
var y_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 1];
var abs_x = piece_x + x_off;
var abs_y = piece_y + y_off;
if (abs_x < 0 || abs_y < 0 || abs_x >= ###GRID_WIDTH### || abs_y >= ###GRID_HEIGHT###) {
collision = true;
break;
}
if (abs_y >= ###GRID_HEIGHT### || field[abs_x][abs_y]) {
collision = true;
break;
}
}
if (collision) {
// if at the top, game over
if (piece_y == 1) {
game_over();
return;
}
// add to field
piece_y--;
for (var square = 0; square < 4; ++square) {
var x_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 0];
var y_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 1];
var abs_x = piece_x + x_off;
var abs_y = piece_y + y_off;
if (abs_x < 0 || abs_y < 0 || abs_x >= ###GRID_WIDTH### || abs_y >= ###GRID_HEIGHT###) {
// TODO: it is out of bounds, we should nudge it inwards?
continue;
}
field[abs_x][abs_y] = true;
}
check_for_filled_lines();
spawn_new_piece();
}
}
function draw_updated_score() {
this.getField("T_score").value = `Score: ${score}`;
}
function set_pixel(x, y, state) {
if (x < 0 || y < 0 || x >= ###GRID_WIDTH### || y >= ###GRID_HEIGHT###) {
return;
}
pixel_fields[x][###GRID_HEIGHT### - 1 - y].hidden = !state;
}
function draw_field() {
for (var x = 0; x < ###GRID_WIDTH###; ++x) {
for (var y = 0; y < ###GRID_HEIGHT###; ++y) {
set_pixel(x, y, field[x][y]);
}
}
}
function draw_current_piece() {
for (var square = 0; square < 4; ++square) {
var x_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 0];
var y_off = piece_data[piece_type * 32 + piece_rot * 8 + square * 2 + 1];
var abs_x = piece_x + x_off;
var abs_y = piece_y + y_off;
set_pixel(abs_x, abs_y, 1);
}
}
function draw() {
draw_field();
draw_current_piece();
}
function game_tick() {
time_ms += TICK_INTERVAL;
game_update();
draw();
}
// Hide controls to start with
set_controls_visibility(false);
// Zoom to fit (on FF)
app.execMenuItem("FitPage");
endstream
endobj
18 0 obj
<<
/JS 43 0 R
/S /JavaScript
>>
endobj
43 0 obj
<< >>
stream
endstream
endobj
trailer
<<
/Root 1 0 R
>>
%%EOF
"""
PLAYING_FIELD_OBJ = """
###IDX### obj
<<
/FT /Btn
/Ff 1
/MK <<
/BG [
0.8
]
/BC [
0 0 0
]
>>
/Border [ 0 0 1 ]
/P 16 0 R
/Rect [
###RECT###
]
/Subtype /Widget
/T (playing_field)
/Type /Annot
>>
endobj
"""
PIXEL_OBJ = """
###IDX### obj
<<
/FT /Btn
/Ff 1
/MK <<
/BG [
###COLOR###
]
/BC [
0.5 0.5 0.5
]
>>
/Border [ 0 0 1 ]
/P 16 0 R
/Rect [
###RECT###
]
/Subtype /Widget
/T (P_###X###_###Y###)
/Type /Annot
>>
endobj
"""
BUTTON_AP_STREAM = """
###IDX### obj
<<
/BBox [ 0.0 0.0 ###WIDTH### ###HEIGHT### ]
/FormType 1
/Matrix [ 1.0 0.0 0.0 1.0 0.0 0.0]
/Resources <<
/Font <<
/HeBo 10 0 R
>>
/ProcSet [ /PDF /Text ]
>>
/Subtype /Form
/Type /XObject
>>
stream
q
0.75 g
0 0 ###WIDTH### ###HEIGHT### re
f
Q
q
1 1 ###WIDTH### ###HEIGHT### re
W
n
BT
/HeBo 12 Tf
0 g
10 8 Td
(###TEXT###) Tj
ET
Q
endstream
endobj
"""
BUTTON_OBJ = """
###IDX### obj
<<
/A <<
/JS ###SCRIPT_IDX### R
/S /JavaScript
>>
/AP <<
/N ###AP_IDX### R
>>
/F 4
/FT /Btn
/Ff 65536
/MK <<
/BG [
0.75
]
/CA (###LABEL###)
>>
/P 16 0 R
/Rect [
###RECT###
]
/Subtype /Widget
/T (###NAME###)
/Type /Annot
>>
endobj
"""
TEXT_OBJ = """
###IDX### obj
<<
/AA <<
/K <<
/JS ###SCRIPT_IDX### R
/S /JavaScript
>>
>>
/F 4
/FT /Tx
/MK <<
>>
/MaxLen 0
/P 16 0 R
/Rect [
###RECT###
]
/Subtype /Widget
/T (###NAME###)
/V (###LABEL###)
/Type /Annot
>>
endobj
"""
STREAM_OBJ = """
###IDX### obj
<< >>
stream
###CONTENT###
endstream
endobj
"""
# p1 = PIXEL_OBJ.replace("###IDX###", "50 0").replace("###COLOR###","1 0 0").replace("###RECT###", "460 700 480 720")
PX_SIZE = 20
GRID_WIDTH = 10
GRID_HEIGHT = 20
GRID_OFF_X = 200
GRID_OFF_Y = 350
fields_text = ""
field_indexes = []
obj_idx_ctr = 50
def add_field(field):
global fields_text, field_indexes, obj_idx_ctr
fields_text += field
field_indexes.append(obj_idx_ctr)
obj_idx_ctr += 1
# Playing field outline
playing_field = PLAYING_FIELD_OBJ
playing_field = playing_field.replace("###IDX###", f"{obj_idx_ctr} 0")
playing_field = playing_field.replace("###RECT###", f"{GRID_OFF_X} {GRID_OFF_Y} {GRID_OFF_X+GRID_WIDTH*PX_SIZE} {GRID_OFF_Y+GRID_HEIGHT*PX_SIZE}")
add_field(playing_field)
for x in range(GRID_WIDTH):
for y in range(GRID_HEIGHT):
# Build object
pixel = PIXEL_OBJ
pixel = pixel.replace("###IDX###", f"{obj_idx_ctr} 0")
c = [0, 0, 0]
pixel = pixel.replace("###COLOR###", f"{c[0]} {c[1]} {c[2]}")
pixel = pixel.replace("###RECT###", f"{GRID_OFF_X+x*PX_SIZE} {GRID_OFF_Y+y*PX_SIZE} {GRID_OFF_X+x*PX_SIZE+PX_SIZE} {GRID_OFF_Y+y*PX_SIZE+PX_SIZE}")
pixel = pixel.replace("###X###", f"{x}")
pixel = pixel.replace("###Y###", f"{y}")
add_field(pixel)
def add_button(label, name, x, y, width, height, js):
script = STREAM_OBJ;
script = script.replace("###IDX###", f"{obj_idx_ctr} 0")
script = script.replace("###CONTENT###", js)
add_field(script)
ap_stream = BUTTON_AP_STREAM;
ap_stream = ap_stream.replace("###IDX###", f"{obj_idx_ctr} 0")
ap_stream = ap_stream.replace("###TEXT###", label)
ap_stream = ap_stream.replace("###WIDTH###", f"{width}")
ap_stream = ap_stream.replace("###HEIGHT###", f"{height}")
add_field(ap_stream)
button = BUTTON_OBJ;
button = button.replace("###IDX###", f"{obj_idx_ctr} 0")
button = button.replace("###SCRIPT_IDX###", f"{obj_idx_ctr-2} 0")
button = button.replace("###AP_IDX###", f"{obj_idx_ctr-1} 0")
#button = button.replace("###LABEL###", label)
button = button.replace("###NAME###", name if name else f"B_{obj_idx_ctr}")
button = button.replace("###RECT###", f"{x} {y} {x + width} {y + height}")
add_field(button)
def add_text(label, name, x, y, width, height, js):
script = STREAM_OBJ;
script = script.replace("###IDX###", f"{obj_idx_ctr} 0")
script = script.replace("###CONTENT###", js)
add_field(script)
text = TEXT_OBJ;
text = text.replace("###IDX###", f"{obj_idx_ctr} 0")
text = text.replace("###SCRIPT_IDX###", f"{obj_idx_ctr-1} 0")
text = text.replace("###LABEL###", label)
text = text.replace("###NAME###", name)
text = text.replace("###RECT###", f"{x} {y} {x + width} {y + height}")
add_field(text)
add_button("<", "B_left", GRID_OFF_X + 0, GRID_OFF_Y - 70, 50, 50, "move_left();")
add_button(">", "B_right", GRID_OFF_X + 60, GRID_OFF_Y - 70, 50, 50, "move_right();")
add_button("\\\\/", "B_down", GRID_OFF_X + 30, GRID_OFF_Y - 130, 50, 50, "lower_piece();")
add_button("SPIN", "B_rotate", GRID_OFF_X + 140, GRID_OFF_Y - 70, 50, 50, "rotate_piece();")
add_button("Start game", "B_start", GRID_OFF_X + (GRID_WIDTH*PX_SIZE)/2-50, GRID_OFF_Y + (GRID_HEIGHT*PX_SIZE)/2-50, 100, 100, "game_init();")
add_text("Type here for keyboard controls (WASD)", "T_input", GRID_OFF_X + 0, GRID_OFF_Y - 200, GRID_WIDTH*PX_SIZE, 50, "handle_input(event);")
add_text("Score: 0", "T_score", GRID_OFF_X + GRID_WIDTH*PX_SIZE+10, GRID_OFF_Y + GRID_HEIGHT*PX_SIZE-50, 100, 50, "")
filled_pdf = PDF_FILE_TEMPLATE.replace("###FIELDS###", fields_text)
filled_pdf = filled_pdf.replace("###FIELD_LIST###", " ".join([f"{i} 0 R" for i in field_indexes]))
filled_pdf = filled_pdf.replace("###GRID_WIDTH###", f"{GRID_WIDTH}")
filled_pdf = filled_pdf.replace("###GRID_HEIGHT###", f"{GRID_HEIGHT}")
pdffile = open("out.pdf","w")
pdffile.write(filled_pdf)
pdffile.close()