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Qt 4.7 opengl 模块文档

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Qt 4.7 opengl 模块文档 Qt 4.7 opengl 模块文档 Qt 4.7 opengl 模块文档 Qt 4.7 opengl 模块文档

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QtOpenGL Module

The QtOpenGL module offers classes that make it easy to use OpenGL in Qt applications. More...

Namespaces

QGL Specifies miscellaneous identifiers used in the Qt OpenGL module

Classes

QGLBuffer Functions for creating and managing GL buffer objects

QGLColormap Used for installing custom colormaps into a QGLWidget

QGLContext Encapsulates an OpenGL rendering context

QGLFormat Specifies the display format of an OpenGL rendering context

QGLFramebufferObject Encapsulates an OpenGL framebuffer object

QGLFramebufferObjectFormat Specifies the format of an OpenGL framebuffer object

QGLPixelBuffer Encapsulates an OpenGL pbuffer

QGLShader

Allows OpenGL shaders to be compiled

QGLShaderProgram Allows OpenGL shader programs to be linked and used

QGLWidget

Widget for rendering OpenGL graphics

QWSGLWindowSurface

The drawing area for top-level windows with Qt for Embedded Linux

on EGL/OpenGL ES. It also provides the drawing area for

QGLWidgets whether they are top-level windows or children of

another QWidget

Detailed Descriptio

OpenGL is a standard API for rendering 3D graphics. OpenGL only deals with 3D rendering and

provides little or no support for GUI programming issues. The user interface for an OpenGL

application must be created with another toolkit, such as Motif on the X platform, Microsoft

Foundation Classes (MFC) under Windows, or Qt on both platforms.

Note: OpenGL is a trademark of Silicon Graphics, Inc. in the United States and other countries.

The Qt OpenGL module makes it easy to use OpenGL in Qt applications. It provides an OpenGL

widget class that can be used just like any other Qt widget, except that it opens an OpenGL display

buffer where you can use the OpenGL API to render the contents.

To include the definitions of the module's classes, use the following directive:

#include <QtOpenGL>

To link against the module, add this line to your qmake .pro file:

QT += opengl

The Qt OpenGL module is implemented as a platform-independent Qt/C++ wrapper around the

platform-dependent GLX (version 1.3 or later), WGL, or AGL C APIs. Although the basic

functionality provided is very similar to Mark Kilgard's GLUT library, applications using the Qt

OpenGL module can take advantage of the whole Qt API for non-OpenGL-specific GUI functionality.

The QtOpenGL module is available on Windows, X11 and Mac OS X. Qt for Embedded Linux and

OpenGL supports OpenGL ES (OpenGL for Embedded Systems). Note: To be able to use the OpenGL

API in Qt for Embedded Linux, it must be integrated with the Q Window System (QWS). See the Qt

for Embedded Linux and OpenGL documentation for details.

QGL Namespace

The QGL namespace specifies miscellaneous identifiers used in the Qt OpenGL module. More...

#include <QGL>

Types

enum

FormatOption { DoubleBuffer, DepthBuffer, Rgba, AlphaChannel, ...,

NoDeprecatedFunctions }

flags FormatOptions

Functions

void setPreferredPaintEngine ( QPaintEngine::Type engineType )

Detailed Description

The QGL namespace specifies miscellaneous identifiers used in the Qt OpenGL module.

Type Documentation

enum QGL::FormatOption

flags QGL::FormatOptions

This enum specifies the format options that can be used to configure an OpenGL context. These are set

using QGLFormat::setOption().

Constant Value Description

QGL::DoubleBuffer 0x0001 Specifies the use of double buffering.

QGL::DepthBuffer 0x0002 Enables the use of a depth buffer.

QGL::Rgba 0x0004

Specifies that the context should use

RGBA as its pixel format.

QGL::AlphaChannel 0x0008 Enables the use of an alpha channel.

QGL::AccumBuffer 0x0010

Enables the use of an accumulation

buffer.

QGL::StencilBuffer 0x0020 Enables the use of a stencil buffer.

QGL::StereoBuffers 0x0040

Enables the use of a stereo buffers for

use with visualization hardware.

QGL::DirectRendering 0x0080

Specifies that the context is used for

direct rendering to a display.

QGL::HasOverlay 0x0100 Enables the use of an overlay.

QGL::SampleBuffers 0x0200 Enables the use of sample buffers.

QGL::DeprecatedFunctions 0x0400 Enables the use of deprecated

functionality for OpenGL 3.x contexts.

A context with deprecated functionality

enabled is called a full context in the

OpenGL specification.

QGL::SingleBuffer DoubleBuffer<<16

Specifies the use of a single buffer, as

opposed to double buffers.

QGL::NoDepthBuffer DepthBuffer<<16 Disables the use of a depth buffer.

QGL::ColorIndex Rgba<<16

Specifies that the context should use a

color index as its pixel format.

QGL::NoAlphaChannel AlphaChannel<<16 Disables the use of an alpha channel.

QGL::NoAccumBuffer AccumBuffer<<16

Disables the use of an accumulation

buffer.

QGL::NoStencilBuffer StencilBuffer<<16 Disables the use of a stencil buffer.

QGL::NoStereoBuffers StereoBuffers<<16 Disables the use of stereo buffers.

QGL::IndirectRendering DirectRendering<<16

Specifies that the context is used for

indirect rendering to a buffer.

QGL::NoOverlay HasOverlay<<16 Disables the use of an overlay.

QGL::NoSampleBuffers SampleBuffers<<16 Disables the use of sample buffers.

QGL::NoDeprecatedFunctions DeprecatedFunctions<<16

Disables the use of deprecated

functionality for OpenGL 3.x contexts.

A context with deprecated functionality

disabled is called a forward compatible

context in the OpenGL specification.

The FormatOptions type is a typedef for QFlags<FormatOption>. It stores an OR combination of

FormatOption values.

opengl sdk 4.7.0

elerao

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