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/***************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation
**
** This library is free software; you can redistribute it and/or
** modify it 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.
**
****************************************************************************/
#include "mpixmapdata.h"
#include "mextensions.h"
#include "../private/qimage_p.h"
#include "../private/qwindowsurface_gl_p.h"
#include "../private/qeglcontext_p.h"
#include "../private/qapplication_p.h"
#include "../private/qgraphicssystem_runtime_p.h"
static EGLint preserved_image_attribs[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE };
QHash <void*, MImageInfo*> MPixmapData::sharedImagesMap;
/* Public */
MPixmapData::MPixmapData() : QGLPixmapData(QPixmapData::PixmapType)
{
}
void MPixmapData::fromTexture(GLuint textureId, int w, int h, bool alpha)
{
resize(w, h);
texture()->id = textureId;
m_hasAlpha = alpha;
softImage = QImage();
}
QImage MPixmapData::toImage() const
{
return softImage;
}
void MPixmapData::fromImage(const QImage &image,
Qt::ImageConversionFlags flags)
{
void *rawResource = static_cast <void *> (((QImage &) image).data_ptr()->data);
if (sharedImagesMap.contains(rawResource)) {
MImageInfo *info = sharedImagesMap.value(rawResource);
fromEGLSharedImage(info->handle, image);
} else {
// This should *never* happen since the graphics system should never
// create a MPixmapData for an origin that doesn't contain a raster
// image we know about. But...
qWarning("MPixmapData::fromImage called on non-know resource. Falling back...");
QGLPixmapData::fromImage(image, flags);
}
}
void MPixmapData::fromEGLSharedImage(Qt::HANDLE handle, const QImage &si)
{
if (si.isNull())
qFatal("Trying to build pixmap with an empty/null softimage!");
QGLShareContextScope ctx(qt_gl_share_widget()->context());
MExtensions::ensureInitialized();
bool textureIsBound = false;
GLuint newTextureId;
GLint newWidth, newHeight;
glGenTextures(1, &newTextureId);
glBindTexture(GL_TEXTURE_2D, newTextureId);
glFinish();
EGLImageKHR image = QEgl::eglCreateImageKHR(QEgl::display(), EGL_NO_CONTEXT, EGL_SHARED_IMAGE_NOK,
(EGLClientBuffer)handle, preserved_image_attribs);
if (image != EGL_NO_IMAGE_KHR) {
glFinish();
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
GLint err = glGetError();
if (err == GL_NO_ERROR)
textureIsBound = true;
MExtensions::eglQueryImageNOK(QEgl::display(), image, EGL_WIDTH, &newWidth);
MExtensions::eglQueryImageNOK(QEgl::display(), image, EGL_HEIGHT, &newHeight);
QEgl::eglDestroyImageKHR(QEgl::display(), image);
glFinish();
}
if (textureIsBound) {
// FIXME Remove this ugly hasAlphaChannel check when Qt lands the NoOpaqueCheck flag fix
// for QGLPixmapData.
fromTexture(newTextureId, newWidth, newHeight,
(si.hasAlphaChannel() && const_cast<QImage &>(si).data_ptr()->checkForAlphaPixels()));
softImage = si;
MPixmapData::registerSharedImage(handle, softImage);
} else {
qWarning("Failed to create a texture from a shared image!");
glDeleteTextures(1, &newTextureId);
}
}
Qt::HANDLE MPixmapData::imageToEGLSharedImage(const QImage &image)
{
QGLShareContextScope ctx(qt_gl_share_widget()->context());
MExtensions::ensureInitialized();
glFinish();
QGLPixmapData pixmapData(QPixmapData::PixmapType);
pixmapData.fromImage(image, 0);
GLuint textureId = pixmapData.bind();
glFinish();
EGLImageKHR eglimage = QEgl::eglCreateImageKHR(QEgl::display(), QEglContext::currentContext(QEgl::OpenGL)->context(),
EGL_GL_TEXTURE_2D_KHR,
(EGLClientBuffer) textureId,
preserved_image_attribs);
glFinish();
if (eglimage) {
EGLNativeSharedImageTypeNOK handle = MExtensions::eglCreateSharedImageNOK(QEgl::display(), eglimage, NULL);
QEgl::eglDestroyImageKHR(QEgl::display(), eglimage);
glFinish();
return (Qt::HANDLE) handle;
} else {
qWarning("Failed to create shared image from pixmap/texture!");
return 0;
}
}
void MPixmapData::updateFromSoftImage()
{
m_dirty = true;
m_source = softImage;
ensureCreated();
if (softImage.width() != w || softImage.height() != h)
qWarning("Ooops, looks like softImage changed dimensions since last updated! Corruption ahead?!");
}
bool MPixmapData::destroyEGLSharedImage(Qt::HANDLE h)
{
QGLShareContextScope ctx(qt_gl_share_widget()->context());
MExtensions::ensureInitialized();
QMutableHashIterator <void*, MImageInfo*> i(sharedImagesMap);
while (i.hasNext()) {
i.next();
if (i.value()->handle == h)
i.remove();
}
return MExtensions::eglDestroySharedImageNOK(QEgl::display(), (EGLNativeSharedImageTypeNOK) h);
}
void MPixmapData::registerSharedImage(Qt::HANDLE handle, const QImage &si)
{
void *raw = static_cast <void *> (((QImage) si).data_ptr()->data);
MImageInfo *info;
if (! sharedImagesMap.contains(raw)) {
info = new MImageInfo;
info->handle = handle;
info->rawFormat = si.format();
sharedImagesMap.insert(raw, info);
} else {
info = sharedImagesMap.value(raw);
if (info->handle != handle || info->rawFormat != si.format())
qWarning("Inconsistency detected: overwriting entry in sharedImagesMap but handle/format different");
}
}
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