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Diffstat (limited to 'src/opengl/qglpixelbuffer_mac.mm')
| -rw-r--r-- | src/opengl/qglpixelbuffer_mac.mm | 331 |
1 files changed, 331 insertions, 0 deletions
diff --git a/src/opengl/qglpixelbuffer_mac.mm b/src/opengl/qglpixelbuffer_mac.mm new file mode 100644 index 0000000000..b793ce5dab --- /dev/null +++ b/src/opengl/qglpixelbuffer_mac.mm @@ -0,0 +1,331 @@ +/**************************************************************************** +** +** 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 |