PChart线性图表图像质量
PChart线性图表图像质量
提问于 2016-09-27 21:00:09
我正在使用PChart创建线性图表。除了实际绘制的线条的质量之外，一切都进行得很好。
当然，抗锯齿不会关闭，甚至不会显式打开。
这是一个实际图像的例子，所有这些步骤看起来都很丑陋。
有没有一种方法可以让绘制的线条更流畅，而不需要踏步？
使用的代码：
public function linearTwoAxis($data, $fileName, $startColor = 0)
{
$pData = new \pData();
$i = 0;
foreach ($data as $key => $row)
{
$serie = $this->translator->trans("pages.reportDefault.$key");
$pData->addPoints($row, $serie);
$pData->setSerieOnAxis($serie, $i);
$pData->setSerieWeight($serie, 1);
$pData->setAxisName($i, $serie);
$pData->setPalette($serie, $this->colors[$startColor++]);
$pData->setAxisDisplay($i, AXIS_FORMAT_METRIC);
$i++;
}
$monthNames = array_keys($row);
$pData->setAxisPosition(1, AXIS_POSITION_RIGHT);
$pData->addPoints($monthNames, "Labels");
$pData->setAbscissa("Labels");
$pChart = new \pImage(750, 200, $pData);
$pChart->setFontProperties(array(
"FontName" => $this->fonts_dir . "arial.ttf",
"FontSize" => 8)
);
$pChart->setGraphArea(50, 10, 700, 150);
$pChart->Antialias = TRUE;
$pChart->drawScale(["Mode" => SCALE_MODE_START0]);
$pChart->drawLineChart();
$pChart->drawLegend(325,180,array("Style"=>LEGEND_BOX,"Mode"=>LEGEND_HORIZONTAL, "BoxWidth"=>30,"Family"=>LEGEND_FAMILY_LINE,"Alpha" => 0));
$pChart->render($this->target_dir . $fileName);
return $this->target_dirname . $fileName;
}回答 1
Stack Overflow用户
发布于 2016-10-18 19:21:25
如果删除setSerieWeight，则会产生更好的抗锯齿效果。例如。
<?php
require_once "class/pDraw.class.php"; require_once "class/pImage.class.php"; require_once "class/pData.class.php";
$pData = new \pData();
$data = array(array(0,100),array(100,200),array(200,500));
$i = 0;
foreach ($data as $key => $row)
{
$serie = 'test';
$pData->addPoints($row, $serie);
$pData->setSerieOnAxis($serie, $i);
$pData->setAxisName($i, $serie);
$pData->setPalette($serie, array("R"=>74,"G"=>42,"B"=>112,"Alpha"=>100));
$pData->setAxisDisplay($i, AXIS_FORMAT_METRIC);
$i++;
}
$monthNames = array_keys($row);
$pChart = new \pImage(750, 200, $pData);
$pChart->setFontProperties(array(
"FontName" => "arial.ttf",
"FontSize" => 8)
);
$pChart->setGraphArea(50, 10, 700, 150);
$pChart->Antialias = TRUE;
$pChart->drawScale(["Mode" => SCALE_MODE_START0]);
$pChart->drawLineChart();
$pChart->drawLegend(325,180,array("Style"=>LEGEND_BOX,"Mode"=>LEGEND_HORIZONTAL, "BoxWidth"=>30,"Family"=>LEGEND_FAMILY_LINE,"Alpha" => 0));
$pChart->render('test.png');
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39725365
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