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platforms/drm: Fix software flip output transforms

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Currently, flip output transformations in the software fallback code
path are equivalent to normal rotate output transformations.

This change implements flip output transformations according to the
wl_output spec.
This commit is contained in:
Vlad Zahorodnii 2020-10-13 23:15:46 +03:00
parent 3b8e489b6f
commit f1741317cd
4 changed files with 71 additions and 69 deletions
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69
abstract_wayland_output.cpp
View file

@ -311,45 +311,48 @@ AbstractWaylandOutput::Transform AbstractWaylandOutput::transform() const
return static_cast<Transform>(m_waylandOutputDevice->transform());
}
// TODO: Do we need to handle the flipped cases differently?
int transformToRotation(AbstractWaylandOutput::Transform transform)
{
switch (transform) {
case AbstractWaylandOutput::Transform::Normal:
case AbstractWaylandOutput::Transform::Flipped:
return 0;
case AbstractWaylandOutput::Transform::Rotated90:
case AbstractWaylandOutput::Transform::Flipped90:
return 90;
case AbstractWaylandOutput::Transform::Rotated180:
case AbstractWaylandOutput::Transform::Flipped180:
return 180;
case AbstractWaylandOutput::Transform::Rotated270:
case AbstractWaylandOutput::Transform::Flipped270:
return 270;
}
Q_UNREACHABLE();
return 0;
}
int AbstractWaylandOutput::rotation() const
{
return transformToRotation(transform());
}
QMatrix4x4 AbstractWaylandOutput::transformation() const
{
const QSize outputSize = modeSize();
const QSize logicalSize = pixelSize();
const QRect rect = geometry();
QMatrix4x4 matrix;
matrix.translate(outputSize.width()/2, outputSize.height()/2);
matrix.rotate(rotation(), 0, 0, 1);
matrix.translate(-logicalSize.width()/2, -logicalSize.height()/2);
matrix.scale(scale());
const QPoint topLeft = -globalPos();
matrix.translate(-topLeft.x(), -topLeft.y());
switch (transform()) {
case Transform::Normal:
case Transform::Flipped:
break;
case Transform::Rotated90:
case Transform::Flipped90:
matrix.translate(0, rect.width());
matrix.rotate(-90, 0, 0, 1);
break;
case Transform::Rotated180:
case Transform::Flipped180:
matrix.translate(rect.width(), rect.height());
matrix.rotate(-180, 0, 0, 1);
break;
case Transform::Rotated270:
case Transform::Flipped270:
matrix.translate(rect.height(), 0);
matrix.rotate(-270, 0, 0, 1);
break;
}
switch (transform()) {
case Transform::Flipped:
case Transform::Flipped90:
case Transform::Flipped180:
case Transform::Flipped270:
matrix.translate(rect.width(), 0);
matrix.scale(-1, 1);
break;
default:
break;
}
matrix.translate(-rect.x(), -rect.y());
return matrix;
}

7
abstract_wayland_output.h
View file

@ -112,13 +112,6 @@ public:
QString description() const;
/**
* The current rotation of the output
*
* @return rotation in degrees
*/
int rotation() const;
/**
* Returns a matrix that can translate into the display's coordinates system
*/

29
plugins/platforms/drm/drm_output.cpp
View file

@ -197,33 +197,10 @@ void DrmOutput::updateCursor()
void DrmOutput::moveCursor(Cursor *cursor, const QPoint &globalPos)
{
const QPoint localPos = globalPos - AbstractWaylandOutput::globalPos();
QPoint pos = localPos;
// TODO: Do we need to handle the flipped cases differently?
switch (transform()) {
case Transform::Normal:
case Transform::Flipped:
break;
case Transform::Rotated90:
case Transform::Flipped90:
pos = QPoint(localPos.y(), pixelSize().width() / scale() - localPos.x());
break;
case Transform::Rotated270:
case Transform::Flipped270:
pos = QPoint(pixelSize().height() / scale() - localPos.y(), localPos.x());
break;
case Transform::Rotated180:
case Transform::Flipped180:
pos = QPoint(pixelSize().width() / scale() - localPos.x(),
pixelSize().height() / scale() - localPos.y());
break;
default:
Q_UNREACHABLE();
}
pos *= scale();
const QMatrix4x4 hotspotMatrix = matrixForTransform(cursor->image().rect(), scale(), transform());
const QMatrix4x4 monitorMatrix = transformation();
QPoint pos = monitorMatrix.map(globalPos);
pos -= hotspotMatrix.map(cursor->hotspot());
drmModeMoveCursor(m_gpu->fd(), m_crtc->id(), pos.x(), pos.y());

35
plugins/platforms/drm/egl_gbm_backend.cpp
View file

@ -323,9 +323,38 @@ void EglGbmBackend::renderFramebufferToSurface(Output &output)
auto shader = ShaderManager::instance()->pushShader(ShaderTrait::MapTexture);
QMatrix4x4 rotationMatrix;
rotationMatrix.rotate(output.output->rotation(), 0, 0, 1);
shader->setUniform(GLShader::ModelViewProjectionMatrix, rotationMatrix);
QMatrix4x4 mvpMatrix;
const DrmOutput *drmOutput = output.output;
switch (drmOutput->transform()) {
case DrmOutput::Transform::Normal:
case DrmOutput::Transform::Flipped:
break;
case DrmOutput::Transform::Rotated90:
case DrmOutput::Transform::Flipped90:
mvpMatrix.rotate(90, 0, 0, 1);
break;
case DrmOutput::Transform::Rotated180:
case DrmOutput::Transform::Flipped180:
mvpMatrix.rotate(180, 0, 0, 1);
break;
case DrmOutput::Transform::Rotated270:
case DrmOutput::Transform::Flipped270:
mvpMatrix.rotate(270, 0, 0, 1);
break;
}
switch (drmOutput->transform()) {
case DrmOutput::Transform::Flipped:
case DrmOutput::Transform::Flipped90:
case DrmOutput::Transform::Flipped180:
case DrmOutput::Transform::Flipped270:
mvpMatrix.scale(-1, 1);
break;
default:
break;
}
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvpMatrix);
glBindTexture(GL_TEXTURE_2D, output.render.texture);
output.render.vbo->render(GL_TRIANGLES);