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Restore the backend set viewport when popping the final render target

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Summary:
The backend is responsible for setting the viewport, the GLRenderTarget
should save and restore the viewport actually set by the backend.

Test Plan:
Ran Blur effect which uses this method, under scaling the viewport "restored"
differed from the one set by the backend.

Reviewers: #plasma

Subscribers: plasma-devel, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D4952
This commit is contained in:
David Edmundson 2017-03-06 00:39:41 +00:00
parent 71600d0a02
commit 9cb666f469
2 changed files with 6 additions and 3 deletions
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8
libkwineffects/kwinglutils.cpp
View file

@ -1038,6 +1038,7 @@ QStack<GLRenderTarget*> GLRenderTarget::s_renderTargets = QStack<GLRenderTarget*
QSize GLRenderTarget::s_virtualScreenSize;
QRect GLRenderTarget::s_virtualScreenGeometry;
qreal GLRenderTarget::s_virtualScreenScale = 1.0;
GLint GLRenderTarget::s_virtualScreenViewport[4];
void GLRenderTarget::initStatic()
{
@ -1074,6 +1075,9 @@ bool GLRenderTarget::blitSupported()
void GLRenderTarget::pushRenderTarget(GLRenderTarget* target)
{
if (s_renderTargets.isEmpty()) {
glGetIntegerv(GL_VIEWPORT, s_virtualScreenViewport);
}
target->enable();
s_renderTargets.push(target);
}
@ -1086,10 +1090,8 @@ GLRenderTarget* GLRenderTarget::popRenderTarget()
if (!s_renderTargets.isEmpty()) {
s_renderTargets.top()->enable();
} else {
glViewport (-s_virtualScreenGeometry.x(), s_virtualScreenGeometry.height() - s_virtualScreenSize.height() - s_virtualScreenGeometry.y(),
s_virtualScreenSize.width(), s_virtualScreenSize.height());
glViewport (s_virtualScreenViewport[0], s_virtualScreenViewport[1], s_virtualScreenViewport[2], s_virtualScreenViewport[3]);
}
return ret;
}

1
libkwineffects/kwinglutils.h
View file

@ -534,6 +534,7 @@ private:
static QSize s_virtualScreenSize;
static QRect s_virtualScreenGeometry;
static qreal s_virtualScreenScale;
static GLint s_virtualScreenViewport[4];
GLTexture mTexture;
bool mValid;