diff options
Diffstat (limited to 'src/platformsupport/eglconvenience/qeglcompositor.cpp')
| -rw-r--r-- | src/platformsupport/eglconvenience/qeglcompositor.cpp | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/src/platformsupport/eglconvenience/qeglcompositor.cpp b/src/platformsupport/eglconvenience/qeglcompositor.cpp new file mode 100644 index 0000000000..c8b768ae48 --- /dev/null +++ b/src/platformsupport/eglconvenience/qeglcompositor.cpp @@ -0,0 +1,194 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the plugins 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 <QtGui/QOpenGLContext> +#include <QtGui/QOpenGLShaderProgram> +#include <QtGui/QOpenGLFramebufferObject> + +#include "qeglcompositor_p.h" +#include "qeglplatformwindow_p.h" +#include "qeglplatformscreen_p.h" + +QT_BEGIN_NAMESPACE + +static QEGLCompositor *compositor = 0; + +QEGLCompositor::QEGLCompositor() + : m_context(0), + m_window(0), + m_program(0) +{ + Q_ASSERT(!compositor); + m_updateTimer.setSingleShot(true); + m_updateTimer.setInterval(0); + connect(&m_updateTimer, SIGNAL(timeout()), SLOT(renderAll())); +} + +QEGLCompositor::~QEGLCompositor() +{ + Q_ASSERT(compositor == this); + delete m_program; + compositor = 0; +} + +void QEGLCompositor::schedule(QOpenGLContext *context, QEGLPlatformWindow *window) +{ + m_context = context; + m_window = window; + if (!m_updateTimer.isActive()) + m_updateTimer.start(); +} + +void QEGLCompositor::renderAll() +{ + Q_ASSERT(m_context && m_window); + m_context->makeCurrent(m_window->window()); + ensureProgram(); + m_program->bind(); + + QEGLPlatformScreen *screen = static_cast<QEGLPlatformScreen *>(m_window->screen()); + QList<QEGLPlatformWindow *> windows = screen->windows(); + for (int i = 0; i < windows.size(); ++i) { + QEGLPlatformWindow *window = windows.at(i); + uint texture = window->texture(); + if (texture) + render(window, texture, window->isRaster()); + } + + m_program->release(); + m_context->swapBuffers(m_window->window()); +} + +void QEGLCompositor::ensureProgram() +{ + if (!m_program) { + static const char *textureVertexProgram = + "attribute highp vec2 vertexCoordEntry;\n" + "attribute highp vec2 textureCoordEntry;\n" + "varying highp vec2 textureCoord;\n" + "void main() {\n" + " textureCoord = textureCoordEntry;\n" + " gl_Position = vec4(vertexCoordEntry, 0.0, 1.0);\n" + "}\n"; + + static const char *textureFragmentProgram = + "uniform sampler2D texture;\n" + "varying highp vec2 textureCoord;\n" + "uniform bool isRaster;\n" + "void main() {\n" + " lowp vec4 c = texture2D(texture, textureCoord);\n" + " gl_FragColor = isRaster ? c.bgra : c.rgba;\n" + "}\n"; + + m_program = new QOpenGLShaderProgram; + + m_program->addShaderFromSourceCode(QOpenGLShader::Vertex, textureVertexProgram); + m_program->addShaderFromSourceCode(QOpenGLShader::Fragment, textureFragmentProgram); + m_program->link(); + + m_vertexCoordEntry = m_program->attributeLocation("vertexCoordEntry"); + m_textureCoordEntry = m_program->attributeLocation("textureCoordEntry"); + m_isRasterEntry = m_program->uniformLocation("isRaster"); + } +} + +void QEGLCompositor::render(QEGLPlatformWindow *window, uint texture, bool raster) +{ + const GLfloat textureCoordinates[] = { + 0, 0, + 1, 0, + 1, 1, + 0, 1 + }; + + QRectF sr = window->screen()->geometry(); + QRect r = window->window()->geometry(); + QPoint tl = r.topLeft(); + QPoint br = r.bottomRight(); + + GLfloat x1 = (tl.x() / sr.width()) * 2 - 1; + GLfloat x2 = (br.x() / sr.width()) * 2 - 1; + GLfloat y1 = ((sr.height() - tl.y()) / sr.height()) * 2 - 1; + GLfloat y2 = ((sr.height() - br.y()) / sr.height()) * 2 - 1; + + if (!raster) + qSwap(y1, y2); + + const GLfloat vertexCoordinates[] = { + x1, y1, + x2, y1, + x2, y2, + x1, y2 + }; + + glViewport(0, 0, sr.width(), sr.height()); + + m_program->enableAttributeArray(m_vertexCoordEntry); + m_program->enableAttributeArray(m_textureCoordEntry); + + m_program->setAttributeArray(m_vertexCoordEntry, vertexCoordinates, 2); + m_program->setAttributeArray(m_textureCoordEntry, textureCoordinates, 2); + + glBindTexture(GL_TEXTURE_2D, texture); + + m_program->setUniformValue(m_isRasterEntry, raster); + + glDrawArrays(GL_TRIANGLE_FAN, 0, 4); + + glBindTexture(GL_TEXTURE_2D, 0); + m_program->enableAttributeArray(m_textureCoordEntry); + m_program->enableAttributeArray(m_vertexCoordEntry); +} + +QEGLCompositor *QEGLCompositor::instance() +{ + if (!compositor) + compositor = new QEGLCompositor; + return compositor; +} + +void QEGLCompositor::destroy() +{ + delete compositor; + compositor = 0; +} + +QT_END_NAMESPACE |