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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qopengltextureuploader_p.h"
#include <qimage.h>
#include <qmath.h>
#include <qopenglfunctions.h>
#include <private/qopenglcontext_p.h>
#include <private/qopenglextensions_p.h>
#ifndef GL_RED
#define GL_RED 0x1903
#endif
#ifndef GL_GREEN
#define GL_GREEN 0x1904
#endif
#ifndef GL_BLUE
#define GL_BLUE 0x1905
#endif
#ifndef GL_RGB10_A2
#define GL_RGB10_A2 0x8059
#endif
#ifndef GL_RGBA16
#define GL_RGBA16 0x805B
#endif
#ifndef GL_BGRA
#define GL_BGRA 0x80E1
#endif
#ifndef GL_UNSIGNED_INT_8_8_8_8_REV
#define GL_UNSIGNED_INT_8_8_8_8_REV 0x8367
#endif
#ifndef GL_UNSIGNED_INT_2_10_10_10_REV
#define GL_UNSIGNED_INT_2_10_10_10_REV 0x8368
#endif
#ifndef GL_TEXTURE_SWIZZLE_RGBA
#define GL_TEXTURE_SWIZZLE_RGBA 0x8E46
#endif
#ifndef GL_SRGB
#define GL_SRGB 0x8C40
#endif
#ifndef GL_SRGB_ALPHA
#define GL_SRGB_ALPHA 0x8C42
#endif
QT_BEGIN_NAMESPACE
qsizetype QOpenGLTextureUploader::textureImage(GLenum target, const QImage &image, QOpenGLTextureUploader::BindOptions options, QSize maxSize)
{
QOpenGLContext *context = QOpenGLContext::currentContext();
QOpenGLExtensions *funcs = static_cast<QOpenGLExtensions*>(context->functions());
QImage tx;
GLenum externalFormat;
GLenum internalFormat;
GLuint pixelType;
QImage::Format targetFormat = QImage::Format_Invalid;
const bool isOpenGL12orBetter = !context->isOpenGLES() && (context->format().majorVersion() >= 2 || context->format().minorVersion() >= 2);
const bool isOpenGLES3orBetter = context->isOpenGLES() && context->format().majorVersion() >= 3;
const bool sRgbBinding = (options & SRgbBindOption);
Q_ASSERT(isOpenGL12orBetter || context->isOpenGLES());
Q_ASSERT((options & (SRgbBindOption | UseRedFor8BitBindOption)) != (SRgbBindOption | UseRedFor8BitBindOption));
switch (image.format()) {
case QImage::Format_RGB32:
case QImage::Format_ARGB32:
case QImage::Format_ARGB32_Premultiplied:
if (isOpenGL12orBetter) {
externalFormat = GL_BGRA;
internalFormat = GL_RGBA;
pixelType = GL_UNSIGNED_INT_8_8_8_8_REV;
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
// Without GL_UNSIGNED_INT_8_8_8_8_REV, BGRA only matches ARGB on little endian:
} else if (funcs->hasOpenGLExtension(QOpenGLExtensions::BGRATextureFormat) && !sRgbBinding) {
// The GL_EXT_texture_format_BGRA8888 extension requires the internal format to match the external.
externalFormat = internalFormat = GL_BGRA;
pixelType = GL_UNSIGNED_BYTE;
} else if (context->isOpenGLES() && context->hasExtension(QByteArrayLiteral("GL_APPLE_texture_format_BGRA8888"))) {
// Is only allowed as an external format like OpenGL.
externalFormat = GL_BGRA;
internalFormat = GL_RGBA;
pixelType = GL_UNSIGNED_BYTE;
#endif
} else if (funcs->hasOpenGLExtension(QOpenGLExtensions::TextureSwizzle)) {
#if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
GLint swizzle[4] = { GL_BLUE, GL_GREEN, GL_RED, GL_ALPHA };
funcs->glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
#else
GLint swizzle[4] = { GL_GREEN, GL_BLUE, GL_ALPHA, GL_RED };
funcs->glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
#endif
externalFormat = internalFormat = GL_RGBA;
pixelType = GL_UNSIGNED_BYTE;
} else {
// No support for direct ARGB32 upload.
break;
}
targetFormat = image.format();
break;
case QImage::Format_BGR30:
case QImage::Format_A2BGR30_Premultiplied:
if (sRgbBinding) {
// Always needs conversion
break;
} else if (isOpenGL12orBetter || isOpenGLES3orBetter) {
pixelType = GL_UNSIGNED_INT_2_10_10_10_REV;
externalFormat = GL_RGBA;
internalFormat = GL_RGB10_A2;
targetFormat = image.format();
}
break;
case QImage::Format_RGB30:
case QImage::Format_A2RGB30_Premultiplied:
if (sRgbBinding) {
// Always needs conversion
break;
} else if (isOpenGL12orBetter) {
pixelType = GL_UNSIGNED_INT_2_10_10_10_REV;
externalFormat = GL_BGRA;
internalFormat = GL_RGB10_A2;
targetFormat = image.format();
} else if (funcs->hasOpenGLExtension(QOpenGLExtensions::TextureSwizzle) && (isOpenGL12orBetter || isOpenGLES3orBetter)) {
pixelType = GL_UNSIGNED_INT_2_10_10_10_REV;
externalFormat = GL_RGBA;
internalFormat = GL_RGB10_A2;
GLint swizzle[4] = { GL_BLUE, GL_GREEN, GL_RED, GL_ALPHA };
funcs->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
targetFormat = image.format();
}
break;
case QImage::Format_RGB444:
case QImage::Format_RGB555:
case QImage::Format_RGB16:
if (isOpenGL12orBetter || context->isOpenGLES()) {
externalFormat = internalFormat = GL_RGB;
pixelType = GL_UNSIGNED_SHORT_5_6_5;
targetFormat = QImage::Format_RGB16;
}
break;
case QImage::Format_RGB666:
case QImage::Format_RGB888:
externalFormat = internalFormat = GL_RGB;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = QImage::Format_RGB888;
break;
case QImage::Format_RGBX8888:
case QImage::Format_RGBA8888:
case QImage::Format_RGBA8888_Premultiplied:
externalFormat = internalFormat = GL_RGBA;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
break;
case QImage::Format_RGBX64:
case QImage::Format_RGBA64:
case QImage::Format_RGBA64_Premultiplied:
externalFormat = internalFormat = GL_RGBA;
if (isOpenGL12orBetter || (context->isOpenGLES() && context->format().majorVersion() >= 3))
internalFormat = GL_RGBA16;
pixelType = GL_UNSIGNED_SHORT;
targetFormat = image.format();
break;
case QImage::Format_Indexed8:
if (sRgbBinding) {
// Always needs conversion
break;
} else if (options & UseRedFor8BitBindOption) {
externalFormat = internalFormat = GL_RED;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
}
break;
case QImage::Format_Alpha8:
if (sRgbBinding) {
// Always needs conversion
break;
} else if (options & UseRedFor8BitBindOption) {
externalFormat = internalFormat = GL_RED;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
} else if (context->isOpenGLES() || context->format().profile() != QSurfaceFormat::CoreProfile) {
externalFormat = internalFormat = GL_ALPHA;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
} else if (funcs->hasOpenGLExtension(QOpenGLExtensions::TextureSwizzle)) {
GLint swizzle[4] = { GL_ZERO, GL_ZERO, GL_ZERO, GL_RED };
funcs->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
externalFormat = internalFormat = GL_RED;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
}
break;
case QImage::Format_Grayscale8:
if (sRgbBinding) {
// Always needs conversion
break;
} else if (options & UseRedFor8BitBindOption) {
externalFormat = internalFormat = GL_RED;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
} else if (context->isOpenGLES() || context->format().profile() != QSurfaceFormat::CoreProfile) {
externalFormat = internalFormat = GL_LUMINANCE;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
} else if (funcs->hasOpenGLExtension(QOpenGLExtensions::TextureSwizzle)) {
GLint swizzle[4] = { GL_RED, GL_RED, GL_RED, GL_ONE };
funcs->glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_SWIZZLE_RGBA, swizzle);
externalFormat = internalFormat = GL_RED;
pixelType = GL_UNSIGNED_BYTE;
targetFormat = image.format();
}
break;
default:
break;
}
// If no direct upload was detected above, convert to RGBA8888 and upload that
if (targetFormat == QImage::Format_Invalid) {
externalFormat = internalFormat = GL_RGBA;
pixelType = GL_UNSIGNED_BYTE;
if (!image.hasAlphaChannel())
targetFormat = QImage::Format_RGBX8888;
else
targetFormat = QImage::Format_RGBA8888;
}
if (options & PremultipliedAlphaBindOption) {
if (targetFormat == QImage::Format_ARGB32)
targetFormat = QImage::Format_ARGB32_Premultiplied;
else if (targetFormat == QImage::Format_RGBA8888)
targetFormat = QImage::Format_RGBA8888_Premultiplied;
else if (targetFormat == QImage::Format_RGBA64)
targetFormat = QImage::Format_RGBA64_Premultiplied;
} else {
if (targetFormat == QImage::Format_ARGB32_Premultiplied)
targetFormat = QImage::Format_ARGB32;
else if (targetFormat == QImage::Format_RGBA8888_Premultiplied)
targetFormat = QImage::Format_RGBA8888;
else if (targetFormat == QImage::Format_RGBA64_Premultiplied)
targetFormat = QImage::Format_RGBA64;
}
if (sRgbBinding) {
Q_ASSERT(internalFormat == GL_RGBA || internalFormat == GL_RGB);
if (image.hasAlphaChannel())
internalFormat = GL_SRGB_ALPHA;
else
internalFormat = GL_SRGB;
}
if (image.format() != targetFormat)
tx = image.convertToFormat(targetFormat);
else
tx = image;
QSize newSize = tx.size();
if (!maxSize.isEmpty())
newSize = newSize.boundedTo(maxSize);
if (options & PowerOfTwoBindOption) {
newSize.setWidth(qNextPowerOfTwo(newSize.width() - 1));
newSize.setHeight(qNextPowerOfTwo(newSize.height() - 1));
}
if (newSize != tx.size())
tx = tx.scaled(newSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
// Handle cases where the QImage is actually a sub image of its image data:
qsizetype naturalBpl = ((qsizetype(tx.width()) * tx.depth() + 31) >> 5) << 2;
if (tx.bytesPerLine() != naturalBpl)
tx = tx.copy(tx.rect());
funcs->glTexImage2D(target, 0, internalFormat, tx.width(), tx.height(), 0, externalFormat, pixelType, tx.constBits());
qsizetype cost = qint64(tx.width()) * tx.height() * tx.depth() / 8;
return cost;
}
QT_END_NAMESPACE
|
