https://bugs.kde.org/show_bug.cgi?id=414296
Bug ID: 414296
Summary: Screenshots are downscaled with dpr > 1
Product: kwin
Version: git master
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: effects-various
Assignee: kwin-bugs-n...@kde.org
Reporter: meve...@gmail.com
Target Milestone: ---
SUMMARY
Screenshots made with spectacle when using a scale ratio are downscaled.
I believe the fix needs to be made in
kwin/effects/screenshot/screenshot.cpp:607 :
QImage ScreenShotEffect::blitScreenshot(const QRect &geometry)
{
QImage img;
if (effects->isOpenGLCompositing())
{
img = QImage(geometry.size(), QImage::Format_ARGB32);
if (GLRenderTarget::blitSupported() &&
!GLPlatform::instance()->isGLES()) {
GLTexture tex(GL_RGBA8, geometry.width(), geometry.height());
GLRenderTarget target(tex);
target.blitFromFramebuffer(geometry);
// copy content from framebuffer into image
tex.bind();
glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE,
(GLvoid*)img.bits());
tex.unbind();
} else {
glReadPixels(0, 0, img.width(), img.height(), GL_RGBA,
GL_UNSIGNED_BYTE, (GLvoid*)img.bits());
}
ScreenShotEffect::convertFromGLImage(img, geometry.width(),
geometry.height());
}
To have an output image whose output image is scaled up.
STEPS TO REPRODUCE
1. With a scaling ratio of 2 for instance (physical res is 3840x2160)
2. Take a fullscreen screenshot with spectacle
OBSERVED RESULT
Screenshot size is 1920*1080.
EXPECTED RESULT
Screenshot size is 3840x2160.
SOFTWARE/OS VERSIONS
Operating System: Kubuntu 19.10
KDE Plasma Version: 5.17.80
KDE Frameworks Version: 5.64.0
Qt Version: 5.12.4
Kernel Version: 5.3.0-23-generic
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