PHP GD 中是否有最大数量的 "Draws"

Question

正如标题所说，您可以使用 PHP 中的 GD 库绘制最大数量 objects。根据下面的代码，我只能显示大约 140 个方块。底部的线条和方块仅在您未首先最大化网格时显示。有人知道完成此操作的另一种方法吗？

<?php
header('Content-type: image/png');
$png_image = imagecreate(3000, 3000);
imagecolorallocate($png_image, 15, 142, 210);

$gridx = 100;
$gridy = 100;

$count = 0;
$currentx = 0;
$currenty = 0;

function makeRec($xpos, $ypos, $c1, $c2, $c3) {
    global $png_image, $currentx, $currenty;
    imagefilledrectangle($png_image, $xpos, $ypos, $xpos+10, $ypos+10, imagecolorallocate($png_image, $c1, $c2, $c3));
    $currentx = $xpos+11;
}
function makexLine($xpos, $ypos) {
    global $png_image, $currentx, $currenty;
    imageline($png_image, $xpos, $ypos, $xpos, $ypos+10, imagecolorallocate($png_image, 0, 0, 0));
    $currentx = $xpos+1;
}
function makeyLine($xpos, $ypos) {
    global $png_image, $currentx, $currenty;
    imageline($png_image, $xpos, $ypos, $xpos+100, $ypos, imagecolorallocate($png_image, 0, 0, 0));
    $currenty = $ypos+1;
}

for($y = 0; $y < $gridy; $y++) {
    makeyline($currentx, $currenty);
    for($x = 0; $x < $gridx; $x++) {
        makexLine($currentx, $currenty);
        if($count == 0) {
            makeRec($currentx, $currenty, 255, 1, 255);
            $count++;
        }
        else {
            makeRec($currentx, $currenty, 255, 255, 255);
            $count = 0;
        }
    }
    makexLine($currentx, $currenty);
    $currentx = 0;
    $currenty = $currenty + 11;
}
makeyline(0, 200);
makeRec(200, 200, 255, 1, 255);
imagepng($png_image);
imagedestroy($png_image);

?>

Answer 1

运行我系统上的一个测试脚本在棋盘模式中用 imagefilledrectangle() 绘制了 100 万个正方形，效果很好（而且速度出奇地快）。如果有抽奖限制，它至少有那么高。

您的问题似乎是对 imagecolorallocate() 的调用过多。下面我修改了您的代码，使每种颜色仅调用一次 imagecolorallocate()：

header('Content-type: image/png');
$png_image = imagecreate(3000, 3000);
imagecolorallocate($png_image, 15, 142, 210);

$magenta = imagecolorallocate($png_image, 255, 1, 255);
$black = imagecolorallocate($png_image, 0, 0, 0);
$white = imagecolorallocate($png_image, 255, 255, 255);

$gridx = 100;
$gridy = 100;

$count = 0;
$currentx = 0;
$currenty = 0;

function makeRec($xpos, $ypos, $colour) {
    global $png_image, $currentx, $currenty;
    imagefilledrectangle($png_image, $xpos, $ypos, $xpos+10, $ypos+10, $colour);
    $currentx = $xpos+11;
}
function makexLine($xpos, $ypos, $colour) {
    global $png_image, $currentx, $currenty;
    imageline($png_image, $xpos, $ypos, $xpos, $ypos+10, $colour);
    $currentx = $xpos+1;
}
function makeyLine($xpos, $ypos, $colour) {
    global $png_image, $currentx, $currenty;
    imageline($png_image, $xpos, $ypos, $xpos+100, $ypos, $colour);
    $currenty = $ypos+1;
}

for($y = 0; $y < $gridy; $y++) {
    makeyline($currentx, $currenty, $black);
    for($x = 0; $x < $gridx; $x++) {
        makexLine($currentx, $currenty, $black);
        if($count == 0) {
            makeRec($currentx, $currenty, $magenta);
            $count++;
        }
        else {
            makeRec($currentx, $currenty, $white);
            $count = 0;
        }
    }
    makexLine($currentx, $currenty, $black);
    $currentx = 0;
    $currenty = $currenty + 11;
}
makeyline(0, 200, $black);
makeRec(200, 200, $magenta);
imagepng($png_image);
imagedestroy($png_image);

PHP GD 中是否有最大数量的 "Draws"

Is there a maxium amount of "Draws" in PHP GD

php

gd