本文整理汇总了Python中qgis.PyQt.QtPrintSupport.QPrinter.setResolution方法的典型用法代码示例。如果您正苦于以下问题：Python QPrinter.setResolution方法的具体用法？Python QPrinter.setResolution怎么用？Python QPrinter.setResolution使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qgis.PyQt.QtPrintSupport.QPrinter的用法示例。
在下文中一共展示了QPrinter.setResolution方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: _get_composer_pdf_image
# 需要导入模块: from qgis.PyQt.QtPrintSupport import QPrinter [as 别名]
# 或者: from qgis.PyQt.QtPrintSupport.QPrinter import setResolution [as 别名]
def _get_composer_pdf_image(self, width, height, dpi):
pdfpath = getTempfilePath('pdf')
temp_size = os.path.getsize(pdfpath)
p = QPrinter()
p.setOutputFormat(QPrinter.PdfFormat)
p.setOutputFileName(pdfpath)
p.setPaperSize(QSizeF(self._c.paperWidth(), self._c.paperHeight()),
QPrinter.Millimeter)
p.setFullPage(True)
p.setColorMode(QPrinter.Color)
p.setResolution(self._c.printResolution())
pdf_p = QPainter(p)
# page_mm = p.pageRect(QPrinter.Millimeter)
# page_px = p.pageRect(QPrinter.DevicePixel)
# self._c.render(pdf_p, page_px, page_mm)
self._c.renderPage(pdf_p, 0)
pdf_p.end()
if temp_size == os.path.getsize(pdfpath):
return False, ''
filepath = getTempfilePath('png')
# Poppler (pdftocairo or pdftoppm):
# PDFUTIL -png -singlefile -r 72 -x 0 -y 0 -W 420 -H 280 in.pdf pngbase
# muPDF (mudraw):
# PDFUTIL -c rgb[a] -r 72 -w 420 -h 280 -o out.png in.pdf
if PDFUTIL.strip().endswith('pdftocairo'):
filebase = os.path.join(
os.path.dirname(filepath),
os.path.splitext(os.path.basename(filepath))[0]
)
call = [
PDFUTIL, '-png', '-singlefile', '-r', str(dpi),
'-x', '0', '-y', '0', '-W', str(width), '-H', str(height),
pdfpath, filebase
]
elif PDFUTIL.strip().endswith('mudraw'):
call = [
PDFUTIL, '-c', 'rgba',
'-r', str(dpi), '-w', str(width), '-h', str(height),
# '-b', '8',
'-o', filepath, pdfpath
]
else:
return False, ''
qDebug("_get_composer_pdf_image call: {0}".format(' '.join(call)))
res = False
try:
subprocess.check_call(call)
res = True
except subprocess.CalledProcessError as e:
qDebug("_get_composer_pdf_image failed!\n"
"cmd: {0}\n"
"returncode: {1}\n"
"message: {2}".format(e.cmd, e.returncode, e.message))
if not res:
os.unlink(filepath)
filepath = ''
return res, filepath