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Diffstat (limited to 'src/plugins/platforms/ios/qioscontext.mm')
| -rw-r--r-- | src/plugins/platforms/ios/qioscontext.mm | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/plugins/platforms/ios/qioscontext.mm b/src/plugins/platforms/ios/qioscontext.mm new file mode 100644 index 0000000000..d3966964e0 --- /dev/null +++ b/src/plugins/platforms/ios/qioscontext.mm @@ -0,0 +1,204 @@ +/**************************************************************************** +** +** 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 "qioscontext.h" +#include "qioswindow.h" + +#include <dlfcn.h> + +#include <QtGui/QOpenGlContext> + +#import <OpenGLES/EAGL.h> +#import <QuartzCore/CAEAGLLayer.h> + +QIOSContext::QIOSContext(QOpenGLContext *context) + : QPlatformOpenGLContext() + , m_eaglContext([[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2]) +{ + // Start out with the requested format + QSurfaceFormat format = context->format(); + + format.setRenderableType(QSurfaceFormat::OpenGLES); + format.setMajorVersion(2); + format.setMinorVersion(0); + + // Even though iOS internally double-buffers its rendering, we + // report single-buffered here since the buffer remains unchanged + // when swapping unlesss you manually clear it yourself. + format.setSwapBehavior(QSurfaceFormat::SingleBuffer); + + m_format = format; +} + +QIOSContext::~QIOSContext() +{ + [EAGLContext setCurrentContext:m_eaglContext]; + + foreach (const FramebufferObject &framebufferObject, m_framebufferObjects) + deleteBuffers(framebufferObject); + + [EAGLContext setCurrentContext:nil]; + [m_eaglContext release]; +} + +void QIOSContext::deleteBuffers(const FramebufferObject &framebufferObject) +{ + if (framebufferObject.handle) + glDeleteFramebuffers(1, &framebufferObject.handle); + if (framebufferObject.colorRenderbuffer) + glDeleteRenderbuffers(1, &framebufferObject.colorRenderbuffer); + if (framebufferObject.depthRenderbuffer) + glDeleteRenderbuffers(1, &framebufferObject.depthRenderbuffer); +} + +QSurfaceFormat QIOSContext::format() const +{ + return m_format; +} + +bool QIOSContext::makeCurrent(QPlatformSurface *surface) +{ + Q_ASSERT(surface && surface->surface()->surfaceType() == QSurface::OpenGLSurface); + + [EAGLContext setCurrentContext:m_eaglContext]; + glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebufferObject(surface)); + + return true; +} + +void QIOSContext::doneCurrent() +{ + [EAGLContext setCurrentContext:nil]; +} + +void QIOSContext::swapBuffers(QPlatformSurface *surface) +{ + Q_ASSERT(surface && surface->surface()->surfaceType() == QSurface::OpenGLSurface); + Q_ASSERT(surface->surface()->surfaceClass() == QSurface::Window); + QWindow *window = static_cast<QWindow *>(surface->surface()); + Q_ASSERT(m_framebufferObjects.contains(window)); + + [EAGLContext setCurrentContext:m_eaglContext]; + glBindRenderbuffer(GL_RENDERBUFFER, m_framebufferObjects[window].colorRenderbuffer); + [m_eaglContext presentRenderbuffer:GL_RENDERBUFFER]; +} + +GLuint QIOSContext::defaultFramebufferObject(QPlatformSurface *surface) const +{ + Q_ASSERT(surface && surface->surface()->surfaceClass() == QSurface::Window); + QWindow *window = static_cast<QWindow *>(surface->surface()); + + FramebufferObject &framebufferObject = m_framebufferObjects[window]; + + // Set up an FBO for the window if it hasn't been created yet + if (!framebufferObject.handle) { + [EAGLContext setCurrentContext:m_eaglContext]; + + glGenFramebuffers(1, &framebufferObject.handle); + glBindFramebuffer(GL_FRAMEBUFFER, framebufferObject.handle); + + glGenRenderbuffers(1, &framebufferObject.colorRenderbuffer); + glBindRenderbuffer(GL_RENDERBUFFER, framebufferObject.colorRenderbuffer); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, + framebufferObject.colorRenderbuffer); + + if (m_format.depthBufferSize() > 0 || m_format.stencilBufferSize() > 0) { + glGenRenderbuffers(1, &framebufferObject.depthRenderbuffer); + glBindRenderbuffer(GL_RENDERBUFFER, framebufferObject.depthRenderbuffer); + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, + framebufferObject.depthRenderbuffer); + + if (m_format.stencilBufferSize() > 0) + glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_RENDERBUFFER, + framebufferObject.depthRenderbuffer); + } + + connect(window, SIGNAL(destroyed(QObject*)), this, SLOT(windowDestroyed(QObject*))); + } + + // Ensure that the FBO's buffers match the size of the window + QIOSWindow *platformWindow = static_cast<QIOSWindow *>(surface); + if (framebufferObject.renderbufferWidth != platformWindow->effectiveWidth() || + framebufferObject.renderbufferHeight != platformWindow->effectiveHeight()) { + + glBindRenderbuffer(GL_RENDERBUFFER, framebufferObject.colorRenderbuffer); + UIView *view = reinterpret_cast<UIView *>(platformWindow->winId()); + CAEAGLLayer *layer = static_cast<CAEAGLLayer *>(view.layer); + [m_eaglContext renderbufferStorage:GL_RENDERBUFFER fromDrawable:layer]; + + glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &framebufferObject.renderbufferWidth); + glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &framebufferObject.renderbufferHeight); + + if (framebufferObject.depthRenderbuffer) { + glBindRenderbuffer(GL_RENDERBUFFER, framebufferObject.depthRenderbuffer); + + // FIXME: Support more fine grained control over depth/stencil buffer sizes + if (m_format.stencilBufferSize() > 0) + glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8_OES, + framebufferObject.renderbufferWidth, framebufferObject.renderbufferHeight); + else + glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, + framebufferObject.renderbufferWidth, framebufferObject.renderbufferHeight); + } + + if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) + NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatus(GL_FRAMEBUFFER)); + } + + return framebufferObject.handle; +} + +void QIOSContext::windowDestroyed(QObject *object) +{ + QWindow *window = static_cast<QWindow *>(object); + if (m_framebufferObjects.contains(window)) { + deleteBuffers(m_framebufferObjects[window]); + m_framebufferObjects.remove(window); + } +} + +QFunctionPointer QIOSContext::getProcAddress(const QByteArray& functionName) +{ + return reinterpret_cast<QFunctionPointer>(dlsym(RTLD_NEXT, functionName.constData())); +} + +#include "moc_qioscontext.cpp" + |