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kwin: Refactor the window transformation code

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Move the code that computes the transformation matrix into its own
method, and rewrite it to improve readability.
This commit is contained in:
Fredrik Höglund 2011-02-15 18:10:54 +01:00
parent 423cd29afa
commit 5d29307f58
2 changed files with 43 additions and 38 deletions
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79
scene_opengl.cpp
View file

@ -417,6 +417,38 @@ void SceneOpenGL::Window::pixmapDiscarded()
texture.release();
}
QMatrix4x4 SceneOpenGL::Window::transformation(int mask, const WindowPaintData &data) const
{
QMatrix4x4 matrix;
matrix.translate(x(), y());
if (!(mask & PAINT_WINDOW_TRANSFORMED))
return matrix;
matrix.translate(data.xTranslate, data.yTranslate, data.zTranslate);
matrix.scale(data.xScale, data.yScale, data.zScale);
if (!data.rotation)
return matrix;
// Apply the rotation
const qreal xAxis = (data.rotation->axis == RotationData::XAxis ? 1.0 : 0.0);
const qreal yAxis = (data.rotation->axis == RotationData::YAxis ? 1.0 : 0.0);
const qreal zAxis = (data.rotation->axis == RotationData::ZAxis ? 1.0 : 0.0);
matrix.translate(data.rotation->xRotationPoint,
data.rotation->yRotationPoint,
data.rotation->zRotationPoint);
matrix.rotate(data.rotation->angle, xAxis, yAxis, zAxis);
matrix.translate(-data.rotation->xRotationPoint,
-data.rotation->yRotationPoint,
-data.rotation->zRotationPoint);
return matrix;
}
// paint the window
void SceneOpenGL::Window::performPaint(int mask, QRegion region, WindowPaintData data)
{
@ -448,11 +480,6 @@ void SceneOpenGL::Window::performPaint(int mask, QRegion region, WindowPaintData
texture.setFilter(filter == ImageFilterGood ? GL_LINEAR : GL_NEAREST);
// do required transformations
int x = toplevel->x();
int y = toplevel->y();
double z = 0.0;
bool sceneShader = false;
if (!data.shader && ShaderManager::instance()->isValid()) {
@ -461,43 +488,19 @@ void SceneOpenGL::Window::performPaint(int mask, QRegion region, WindowPaintData
data.shader = ShaderManager::instance()->pushShader(ShaderManager::GenericShader);
} else {
data.shader = ShaderManager::instance()->pushShader(ShaderManager::SimpleShader);
data.shader->setUniform(GLShader::Offset, QVector2D(x, y));
data.shader->setUniform(GLShader::Offset, QVector2D(x(), y()));
}
sceneShader = true;
}
QMatrix4x4 windowTransformation;
windowTransformation.translate(x, y);
if ((mask & PAINT_WINDOW_TRANSFORMED) || (mask & PAINT_SCREEN_TRANSFORMED)) {
windowTransformation.translate(data.xTranslate, data.yTranslate, data.zTranslate);
if ((mask & PAINT_WINDOW_TRANSFORMED) && (data.xScale != 1 || data.yScale != 1 || data.zScale != 1)) {
windowTransformation.scale(data.xScale, data.yScale, data.zScale);
}
if ((mask & PAINT_WINDOW_TRANSFORMED) && data.rotation) {
windowTransformation.translate(data.rotation->xRotationPoint, data.rotation->yRotationPoint, data.rotation->zRotationPoint);
qreal xAxis = 0.0;
qreal yAxis = 0.0;
qreal zAxis = 0.0;
switch(data.rotation->axis) {
case RotationData::XAxis:
xAxis = 1.0;
break;
case RotationData::YAxis:
yAxis = 1.0;
break;
case RotationData::ZAxis:
zAxis = 1.0;
break;
}
windowTransformation.rotate(data.rotation->angle, xAxis, yAxis, zAxis);
windowTransformation.translate(-data.rotation->xRotationPoint, -data.rotation->yRotationPoint, -data.rotation->zRotationPoint);
}
if (data.shader) {
data.shader->setUniform(GLShader::WindowTransformation, windowTransformation);
}
}
if (!sceneShader) {
const QMatrix4x4 windowTransformation = transformation(mask, data);
if (data.shader)
data.shader->setUniform(GLShader::WindowTransformation, windowTransformation);
if (!sceneShader)
pushMatrix(windowTransformation);
}
region.translate(toplevel->x(), toplevel->y()); // Back to screen coords
WindowQuadList decoration = data.quads.select(WindowQuadDecoration);

2
scene_opengl.h
View file

@ -155,6 +155,8 @@ protected:
DecorationRight,
DecorationBottom
};
QMatrix4x4 transformation(int mask, const WindowPaintData &data) const;
void paintDecoration(const QPixmap* decoration, TextureType decorationType, const QRegion& region, const QRect& rect, const WindowPaintData& data, const WindowQuadList& quads, bool updateDeco);
void makeDecorationArrays(const WindowQuadList& quads, const QRect& rect) const;
void renderQuads(int mask, const QRegion& region, const WindowQuadList& quads);