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qt6-bb10/src/opengl/qglpixelbuffer_mac.mm

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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qglpixelbuffer.h"
#include "qglpixelbuffer_p.h"
#ifndef QT_MAC_USE_COCOA
#include <AGL/agl.h>
#endif
#include <qimage.h>
#include <private/qgl_p.h>
#include <qdebug.h>
QT_BEGIN_NAMESPACE
#ifndef GL_TEXTURE_RECTANGLE_EXT
#define GL_TEXTURE_RECTANGLE_EXT 0x84F5
#endif
static int nearest_gl_texture_size(int v)
{
int n = 0, last = 0;
for (int s = 0; s < 32; ++s) {
if (((v>>s) & 1) == 1) {
++n;
last = s;
}
}
if (n > 1)
return 1 << (last+1);
return 1 << last;
}
bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget)
{
#ifdef QT_MAC_USE_COCOA
Q_Q(QGLPixelBuffer);
// create a dummy context
QGLContext context(f, q);
context.create(shareWidget ? shareWidget->context() : 0);
if (context.isSharing())
share_ctx = shareWidget->context()->d_func()->cx;
// steal the NSOpenGLContext and update the format
ctx = context.d_func()->cx;
context.d_func()->cx = 0;
// d->cx will be set to ctx later in
// QGLPixelBufferPrivate::common_init, so we need to retain it:
[static_cast<NSOpenGLContext *>(ctx) retain];
format = context.format();
GLenum target = GL_TEXTURE_2D;
if ((QGLExtensions::glExtensions() & QGLExtensions::TextureRectangle)
&& (size.width() != nearest_gl_texture_size(size.width())
|| size.height() != nearest_gl_texture_size(size.height())))
{
target = GL_TEXTURE_RECTANGLE_EXT;
}
pbuf = [[NSOpenGLPixelBuffer alloc] initWithTextureTarget:target
textureInternalFormat:GL_RGBA
textureMaxMipMapLevel:0
pixelsWide:size.width()
pixelsHigh:size.height()];
if (!pbuf) {
qWarning("QGLPixelBuffer: Cannot create a pbuffer");
return false;
}
[static_cast<NSOpenGLContext *>(ctx) setPixelBuffer:static_cast<NSOpenGLPixelBuffer *>(pbuf)
cubeMapFace:0
mipMapLevel:0
currentVirtualScreen:0];
return true;
#else
GLint attribs[40], i=0;
attribs[i++] = AGL_RGBA;
attribs[i++] = AGL_BUFFER_SIZE;
attribs[i++] = 32;
attribs[i++] = AGL_LEVEL;
attribs[i++] = f.plane();
if (f.redBufferSize() != -1) {
attribs[i++] = AGL_RED_SIZE;
attribs[i++] = f.redBufferSize();
}
if (f.greenBufferSize() != -1) {
attribs[i++] = AGL_GREEN_SIZE;
attribs[i++] = f.greenBufferSize();
}
if (f.blueBufferSize() != -1) {
attribs[i++] = AGL_BLUE_SIZE;
attribs[i++] = f.blueBufferSize();
}
if (f.stereo())
attribs[i++] = AGL_STEREO;
if (f.alpha()) {
attribs[i++] = AGL_ALPHA_SIZE;
attribs[i++] = f.alphaBufferSize() == -1 ? 8 : f.alphaBufferSize();
}
if (f.stencil()) {
attribs[i++] = AGL_STENCIL_SIZE;
attribs[i++] = f.stencilBufferSize() == -1 ? 8 : f.stencilBufferSize();
}
if (f.depth()) {
attribs[i++] = AGL_DEPTH_SIZE;
attribs[i++] = f.depthBufferSize() == -1 ? 32 : f.depthBufferSize();
}
if (f.accum()) {
attribs[i++] = AGL_ACCUM_RED_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
attribs[i++] = AGL_ACCUM_BLUE_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
attribs[i++] = AGL_ACCUM_GREEN_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
attribs[i++] = AGL_ACCUM_ALPHA_SIZE;
attribs[i++] = f.accumBufferSize() == -1 ? 16 : f.accumBufferSize();
}
if (f.sampleBuffers()) {
attribs[i++] = AGL_SAMPLE_BUFFERS_ARB;
attribs[i++] = 1;
attribs[i++] = AGL_SAMPLES_ARB;
attribs[i++] = f.samples() == -1 ? 4 : f.samples();
}
attribs[i] = AGL_NONE;
AGLPixelFormat format = aglChoosePixelFormat(0, 0, attribs);
if (!format) {
qWarning("QGLPixelBuffer: Unable to find a pixel format (AGL error %d).",
(int) aglGetError());
return false;
}
GLint res;
aglDescribePixelFormat(format, AGL_LEVEL, &res);
this->format.setPlane(res);
aglDescribePixelFormat(format, AGL_DOUBLEBUFFER, &res);
this->format.setDoubleBuffer(res);
aglDescribePixelFormat(format, AGL_DEPTH_SIZE, &res);
this->format.setDepth(res);
if (this->format.depth())
this->format.setDepthBufferSize(res);
aglDescribePixelFormat(format, AGL_RGBA, &res);
this->format.setRgba(res);
aglDescribePixelFormat(format, AGL_RED_SIZE, &res);
this->format.setRedBufferSize(res);
aglDescribePixelFormat(format, AGL_GREEN_SIZE, &res);
this->format.setGreenBufferSize(res);
aglDescribePixelFormat(format, AGL_BLUE_SIZE, &res);
this->format.setBlueBufferSize(res);
aglDescribePixelFormat(format, AGL_ALPHA_SIZE, &res);
this->format.setAlpha(res);
if (this->format.alpha())
this->format.setAlphaBufferSize(res);
aglDescribePixelFormat(format, AGL_ACCUM_RED_SIZE, &res);
this->format.setAccum(res);
if (this->format.accum())
this->format.setAccumBufferSize(res);
aglDescribePixelFormat(format, AGL_STENCIL_SIZE, &res);
this->format.setStencil(res);
if (this->format.stencil())
this->format.setStencilBufferSize(res);
aglDescribePixelFormat(format, AGL_STEREO, &res);
this->format.setStereo(res);
aglDescribePixelFormat(format, AGL_SAMPLE_BUFFERS_ARB, &res);
this->format.setSampleBuffers(res);
if (this->format.sampleBuffers()) {
aglDescribePixelFormat(format, AGL_SAMPLES_ARB, &res);
this->format.setSamples(res);
}
AGLContext share = 0;
if (shareWidget)
share = share_ctx = static_cast<AGLContext>(shareWidget->d_func()->glcx->d_func()->cx);
ctx = aglCreateContext(format, share);
if (!ctx) {
qWarning("QGLPixelBuffer: Unable to create a context (AGL error %d).",
(int) aglGetError());
return false;
}
GLenum target = GL_TEXTURE_2D;
if ((QGLExtensions::glExtensions() & QGLExtensions::TextureRectangle)
&& (size.width() != nearest_gl_texture_size(size.width())
|| size.height() != nearest_gl_texture_size(size.height())))
{
target = GL_TEXTURE_RECTANGLE_EXT;
}
if (!aglCreatePBuffer(size.width(), size.height(), target, GL_RGBA, 0, &pbuf)) {
qWarning("QGLPixelBuffer: Unable to create a pbuffer (AGL error %d).",
(int) aglGetError());
return false;
}
if (!aglSetPBuffer(ctx, pbuf, 0, 0, 0)) {
qWarning("QGLPixelBuffer: Unable to set pbuffer (AGL error %d).",
(int) aglGetError());
return false;
}
aglDestroyPixelFormat(format);
return true;
#endif
}
bool QGLPixelBufferPrivate::cleanup()
{
#ifdef QT_MAC_USE_COCOA
[static_cast<NSOpenGLPixelBuffer *>(pbuf) release];
pbuf = 0;
[static_cast<NSOpenGLContext *>(ctx) release];
ctx = 0;
#else
aglDestroyPBuffer(pbuf);
#endif
return true;
}
bool QGLPixelBuffer::bindToDynamicTexture(GLuint texture_id)
{
Q_D(QGLPixelBuffer);
if (d->invalid || !d->share_ctx)
return false;
#ifdef QT_MAC_USE_COCOA
NSOpenGLContext *oldContext = [NSOpenGLContext currentContext];
if (d->share_ctx != oldContext)
[static_cast<NSOpenGLContext *>(d->share_ctx) makeCurrentContext];
glBindTexture(GL_TEXTURE_2D, texture_id);
[static_cast<NSOpenGLContext *>(d->share_ctx)
setTextureImageToPixelBuffer:static_cast<NSOpenGLPixelBuffer *>(d->pbuf)
colorBuffer:GL_FRONT];
if (oldContext && oldContext != d->share_ctx)
[oldContext makeCurrentContext];
return true;
#else
aglSetCurrentContext(d->share_ctx);
glBindTexture(GL_TEXTURE_2D, texture_id);
aglTexImagePBuffer(d->share_ctx, d->pbuf, GL_FRONT);
return true;
#endif
}
#ifdef Q_MAC_COMPAT_GL_FUNCTIONS
bool QGLPixelBuffer::bindToDynamicTexture(QMacCompatGLuint texture_id)
{
return bindToDynamicTexture(GLuint(texture_id));
}
#endif
void QGLPixelBuffer::releaseFromDynamicTexture()
{
}
GLuint QGLPixelBuffer::generateDynamicTexture() const
{
#ifdef QT_MAC_USE_COCOA
Q_D(const QGLPixelBuffer);
NSOpenGLContext *oldContext = [NSOpenGLContext currentContext];
if (d->share_ctx != oldContext)
[static_cast<NSOpenGLContext *>(d->share_ctx) makeCurrentContext];
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
if (oldContext && oldContext != d->share_ctx)
[oldContext makeCurrentContext];
return texture;
#else
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
return texture;
#endif
}
bool QGLPixelBuffer::hasOpenGLPbuffers()
{
return true;
}
QT_END_NAMESPACE
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