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Fix streaming of windows when we are using a mix of scales

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At the moment a streamed screen when the screen scale was differnt
buffer scale would render wrong. This change addresses it by
compensating it.

This change compensates it resizing the rendered viewport to their
difference.

BUG: 428594
This commit is contained in:
Aleix Pol 2021-04-15 16:38:19 +02:00
parent a8867e292d
commit b68cd3110a
1 changed files with 7 additions and 6 deletions
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13
src/plugins/scenes/opengl/scene_opengl.cpp
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@ -1580,23 +1580,24 @@ QSharedPointer<GLTexture> OpenGLWindow::windowTexture()
return QSharedPointer<GLTexture>(new GLTexture(*frame->texture()));
} else {
auto effectWindow = window()->effectWindow();
const QRect geo = window()->bufferGeometry();
QSharedPointer<GLTexture> texture(new GLTexture(GL_RGBA8, geo.size() * window()->bufferScale()));
const QRect virtualGeometry = window()->bufferGeometry();
QSharedPointer<GLTexture> texture(new GLTexture(GL_RGBA8, virtualGeometry.size() * window()->bufferScale()));
QScopedPointer<GLRenderTarget> framebuffer(new KWin::GLRenderTarget(*texture));
GLRenderTarget::pushRenderTarget(framebuffer.data());
auto renderVSG = GLRenderTarget::virtualScreenGeometry();
GLVertexBuffer::setVirtualScreenGeometry(geo);
GLRenderTarget::setVirtualScreenGeometry(geo);
const QRect outputGeometry = { virtualGeometry.topLeft(), texture->size() };
GLVertexBuffer::setVirtualScreenGeometry(outputGeometry);
GLRenderTarget::setVirtualScreenGeometry(outputGeometry);
QMatrix4x4 mvp;
mvp.ortho(geo.x(), geo.x() + geo.width(), geo.y(), geo.y() + geo.height(), -1, 1);
mvp.ortho(virtualGeometry.x(), virtualGeometry.x() + virtualGeometry.width(), virtualGeometry.y(), virtualGeometry.y() + virtualGeometry.height(), -1, 1);
WindowPaintData data(effectWindow);
data.setProjectionMatrix(mvp);
performPaint(Scene::PAINT_WINDOW_TRANSFORMED, geo, data);
performPaint(Scene::PAINT_WINDOW_TRANSFORMED, outputGeometry, data);
GLRenderTarget::popRenderTarget();
GLVertexBuffer::setVirtualScreenGeometry(renderVSG);
GLRenderTarget::setVirtualScreenGeometry(renderVSG);