Checkerboard background to signal transparency

This commit is contained in:
Kalekki 2022-11-21 13:40:44 +02:00
parent 32904051aa
commit 4381642e88

View file

@ -429,7 +429,7 @@ function mouseMove(evt) {
ovCtx.drawImage(arbitraryImage, finalX, finalY);
} else if (!paintMode) {
// draw targeting square reticle thingy cursor
ovCtx.strokeStyle = "#00000077";
ovCtx.strokeStyle = "#FFFFFF";
snapOffsetX = 0;
snapOffsetY = 0;
if (snapToGrid) {
@ -816,18 +816,14 @@ function isCanvasBlank(x, y, w, h, specifiedCanvas) {
}
function drawBackground() {
bgCtx.lineWidth = 1;
bgCtx.strokeStyle = "#999";
var gridbox = bgCanvas.getBoundingClientRect();
for (var i = 0; i < gridbox.width; i += 64) {
bgCtx.moveTo(i, 0);
bgCtx.lineTo(i, bgCanvas.height);
bgCtx.stroke();
}
for (var i = 0; i < gridbox.height; i += 64) {
bgCtx.moveTo(0, i);
bgCtx.lineTo(gridbox.width, i);
bgCtx.stroke();
// Checkerboard
let darkTileColor = "#333";
let lightTileColor = "#555";
for (var x = 0; x < bgCanvas.width; x += 64) {
for (var y = 0; y < bgCanvas.height; y += 64) {
bgCtx.fillStyle = (x + y) % 128 === 0 ? lightTileColor : darkTileColor;
bgCtx.fillRect(x, y, 64, 64);
}
}
}