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Diffstat (limited to 'src/opengl/qopenglframebufferobject_p.h')
| -rw-r--r-- | src/opengl/qopenglframebufferobject_p.h | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/src/opengl/qopenglframebufferobject_p.h b/src/opengl/qopenglframebufferobject_p.h new file mode 100644 index 0000000000..df87734a58 --- /dev/null +++ b/src/opengl/qopenglframebufferobject_p.h @@ -0,0 +1,153 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtOpenGL 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. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QOPENGLFRAMEBUFFEROBJECT_P_H +#define QOPENGLFRAMEBUFFEROBJECT_P_H + +// +// W A R N I N G +// ------------- +// +// This file is not part of the Qt API. It exists purely as an +// implementation detail. This header file may change from version to +// version without notice, or even be removed. +// +// We mean it. +// + +#include <qopenglframebufferobject.h> +#include <private/qopenglcontext_p.h> +#include <private/qopenglextensions_p.h> + +QT_BEGIN_NAMESPACE + +class QOpenGLFramebufferObjectFormatPrivate +{ +public: + QOpenGLFramebufferObjectFormatPrivate() + : ref(1), + samples(0), + attachment(QOpenGLFramebufferObject::NoAttachment), + target(GL_TEXTURE_2D), + mipmap(false) + { +#ifndef QT_OPENGL_ES_2 + // There is nothing that says QOpenGLFramebufferObjectFormat needs a current + // context, so we need a fallback just to be safe, even though in pratice there + // will usually be a context current. + QOpenGLContext *ctx = QOpenGLContext::currentContext(); + const bool isES = ctx ? ctx->isOpenGLES() : QOpenGLContext::openGLModuleType() != QOpenGLContext::LibGL; + internal_format = isES ? GL_RGBA : GL_RGBA8; +#else + internal_format = GL_RGBA; +#endif + } + QOpenGLFramebufferObjectFormatPrivate + (const QOpenGLFramebufferObjectFormatPrivate *other) + : ref(1), + samples(other->samples), + attachment(other->attachment), + target(other->target), + internal_format(other->internal_format), + mipmap(other->mipmap) + { + } + bool equals(const QOpenGLFramebufferObjectFormatPrivate *other) + { + return samples == other->samples && + attachment == other->attachment && + target == other->target && + internal_format == other->internal_format && + mipmap == other->mipmap; + } + + QAtomicInt ref; + int samples; + QOpenGLFramebufferObject::Attachment attachment; + GLenum target; + GLenum internal_format; + uint mipmap : 1; +}; + +class QOpenGLFramebufferObjectPrivate +{ +public: + QOpenGLFramebufferObjectPrivate() : fbo_guard(nullptr), depth_buffer_guard(nullptr) + , stencil_buffer_guard(nullptr) + , valid(false) {} + ~QOpenGLFramebufferObjectPrivate() {} + + void init(QOpenGLFramebufferObject *q, const QSize &size, + QOpenGLFramebufferObject::Attachment attachment, + GLenum texture_target, GLenum internal_format, + GLint samples = 0, bool mipmap = false); + void initTexture(int idx); + void initColorBuffer(int idx, GLint *samples); + void initDepthStencilAttachments(QOpenGLContext *ctx, QOpenGLFramebufferObject::Attachment attachment); + + bool checkFramebufferStatus(QOpenGLContext *ctx) const; + QOpenGLSharedResourceGuard *fbo_guard; + QOpenGLSharedResourceGuard *depth_buffer_guard; + QOpenGLSharedResourceGuard *stencil_buffer_guard; + GLenum target; + QSize dsSize; + QOpenGLFramebufferObjectFormat format; + int requestedSamples; + uint valid : 1; + QOpenGLFramebufferObject::Attachment fbo_attachment; + QOpenGLExtensions funcs; + + struct ColorAttachment { + ColorAttachment() : internalFormat(0), guard(nullptr) { } + ColorAttachment(const QSize &size, GLenum internalFormat) + : size(size), internalFormat(internalFormat), guard(nullptr) { } + QSize size; + GLenum internalFormat; + QOpenGLSharedResourceGuard *guard; + }; + QVector<ColorAttachment> colorAttachments; + + inline GLuint fbo() const { return fbo_guard ? fbo_guard->id() : 0; } +}; + +Q_OPENGL_EXPORT QImage qt_gl_read_framebuffer(const QSize &size, bool alpha_format, bool include_alpha); + +QT_END_NAMESPACE + +#endif // QOPENGLFRAMEBUFFEROBJECT_P_H |