Change Details

There are several spaces that have to be considered in `GLRenderTarget::blitFromFramebuffer`: * KWin logical space: the origin is located at the global top-left corner * display space: the origin is located at the top-left corner of monitor/display * OpenGL screen space: the origin is located at the bottom-left corner of monitor/display Given `s`, which is in the KWin logical space, we have to transform it to the display space, then to the OpenGL screen space: * KWin logical space -> display space: `y' = s.y() - s_virtualScreenGeometry.y()` * display space -> OpenGL screen space: `y'' = s_virtualScreenGeometry.height() - y'` Overall, `srcY0` and `srcY1` should be written as following ``` srcY0 = s_virtualScreenGeometry.height() - (s.y() - s_virtualScreenGeometry.y() + s.height()) srcY1 = s_virtualScreenGeometry.height() - (s.y() - s_virtualScreenGeometry.y()) ```

There are several spaces that have to be considered in `GLRenderTarget::blitFromFramebuffer`: * KWin logical space: the origin is located at the global top-left corner * display space: the origin is located at the top-left corner of monitor/display * OpenGL screen space: the origin is located at the bottom-left corner of monitor/display Given `s`, which is in the KWin logical space, we have to transform it to the display space, then to the OpenGL screen space: * KWin logical space -> display space: `y' = s.y() - s_virtualScreenGeometry.y()` * display space -> OpenGL screen space: `y'' = s_virtualScreenGeometry.height() - y'` Overall, `srcY0` and `srcY1` should be written as follows ``` srcY0 = s_virtualScreenGeometry.height() - (s.y() - s_virtualScreenGeometry.y() + s.height()) srcY1 = s_virtualScreenGeometry.height() - (s.y() - s_virtualScreenGeometry.y()) ```

There are several spaces that have to be considered in `GLRenderTarget::blitFromFramebuffer`: * KWin logical space: the origin is located at the global top-left corner * display space: the origin is located at the top-left corner of monitor/display * OpenGL screen space: the origin is located at the bottom-left corner of monitor/display Given `s`, which is in the KWin logical space, we have to transform it to the display space, then to the OpenGL screen space: * KWin logical space -> display space: `y' = s.y() - s_virtualScreenGeometry.y()` * display space -> OpenGL screen space: `y'' = s_virtualScreenGeometry.height() - y'` Overall, `srcY0` and `srcY1` should be written as followings ``` srcY0 = s_virtualScreenGeometry.height() - (s.y() - s_virtualScreenGeometry.y() + s.height()) srcY1 = s_virtualScreenGeometry.height() - (s.y() - s_virtualScreenGeometry.y()) ```