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Diffstat (limited to 'src/gui/kernel/qplatformhardwarecompositor.cpp')
| -rw-r--r-- | src/gui/kernel/qplatformhardwarecompositor.cpp | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/src/gui/kernel/qplatformhardwarecompositor.cpp b/src/gui/kernel/qplatformhardwarecompositor.cpp new file mode 100644 index 0000000000..6c010a7d7c --- /dev/null +++ b/src/gui/kernel/qplatformhardwarecompositor.cpp @@ -0,0 +1,98 @@ +/**************************************************************************** +** +** Copyright (C) 2015 Jolla Ltd, author: <gunnar.sletta@jollamobile.com> +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qplatformhardwarecompositor.h" + +QT_BEGIN_NAMESPACE + +/* + Layer: + + 'transform' is a generic transform which can position the layer at + any given position with optional scale and rotation. It is quite likely that + the hardware compositor does not support arbitrary rotations and projective + transforms, but this is an easy way of expressing a number of different + scale/rotations in a generic way so deal with it. + + 'opacity' is the opacity of the layer + + 'subRect' is the region of the layer to actually draw. By default + this is (0,0)->(1,1). The values are relative to size and can + thus support subpixels. + + 'color' If color is a valid color and handle is 0, render the layer as + a solid color layer. + + 'buffer' The buffer to compose. Please note that the compositor might + lock buffers for read access and retain that lock after the composition + step has finished. + + // Screen geometry (in pixels) + +----------------------------------------- + |\ + | \ transform + | \ (0, 0) is top left in "layer coordinates" + | +-----------------------------------------+ size.width (in pixels) + | | | + | | | + | | | + | | subRect | + | | +---------------------------+ | + | | | float coords in the range | | + | | | 0-1. 0 is top/left. 1 is | | + | | | bottom/right. Relative to | | + | | | size. | | + | | +---------------------------+ | + | | | + | +-----------------------------------------+ + | size.height (in pixels) + | + +*/ + +QPlatformHardwareCompositor::Layer::Layer() + : opacity(1) + , subRect(0, 0, 1, 1) + , buffer(0) +{ +} + +QT_END_NAMESPACE |