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Support scaling in BackgroundContrast effect 

Summary:
Background contrast reads pixels from the framebuffer
we need to convert from compositor to framebuffer co-ordinates
when an output is scaled

Test Plan:
Ran the manual test in kwindowsystem. Moved window over dolphin.
Visually checked output

Reviewers: #plasma

Subscribers: plasma-devel, kwin, #kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D4949
icc-effect-5.14.5
David Edmundson 2017-03-06 00:39:12 +00:00
parent 9ce5832e11
commit f445a99a74
1 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
effects/backgroundcontrast/contrast.cpp
View File

@ -417,6 +417,8 @@ void ContrastEffect::doContrast(EffectWindow *w, const QRegion& shape, const QRe
const QRegion actualShape = shape & screen;
const QRect r = actualShape.boundingRect();
qreal scale = GLRenderTarget::virtualScreenScale();
// Upload geometry for the horizontal and vertical passes
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
uploadGeometry(vbo, actualShape);
@ -424,14 +426,14 @@ void ContrastEffect::doContrast(EffectWindow *w, const QRegion& shape, const QRe
// Create a scratch texture and copy the area in the back buffer that we're
// going to blur into it
GLTexture scratch(GL_RGBA8, r.width(), r.height());
GLTexture scratch(GL_RGBA8, r.width() * scale, r.height() * scale);
scratch.setFilter(GL_LINEAR);
scratch.setWrapMode(GL_CLAMP_TO_EDGE);
scratch.bind();
const QRect sg = GLRenderTarget::virtualScreenGeometry();
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, r.x() - sg.x(), sg.height() - sg.y() - r.y() - r.height(),
r.width(), r.height());
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, (r.x() - sg.x()) * scale, (sg.height() - sg.y() - r.y() - r.height()) * scale,
scratch.width(), scratch.height());
// Draw the texture on the offscreen framebuffer object, while blurring it horizontally
@ -443,8 +445,8 @@ void ContrastEffect::doContrast(EffectWindow *w, const QRegion& shape, const QRe
// Set up the texture matrix to transform from screen coordinates
// to texture coordinates.
QMatrix4x4 textureMatrix;
textureMatrix.scale(1.0 / scratch.width(), -1.0 / scratch.height(), 1);
textureMatrix.translate(-r.x(), -scratch.height() - r.y(), 0);
textureMatrix.scale(1.0 / r.width(), -1.0 / r.height(), 1);
textureMatrix.translate(-r.x(), -r.height() - r.y(), 0);
shader->setTextureMatrix(textureMatrix);
shader->setModelViewProjectionMatrix(screenProjection);