mirror of
https://github.com/glfw/glfw.git
synced 2024-11-10 00:51:47 +00:00
181 lines
8.6 KiB
Plaintext
181 lines
8.6 KiB
Plaintext
/*! @page window Window handling
|
|
|
|
@tableofcontents
|
|
|
|
The primary purpose of GLFW is to provide a simple interface to window
|
|
management and OpenGL and OpenGL ES context creation. GLFW supports
|
|
multiple windows, which can be either a normal desktop window or
|
|
a fullscreen window.
|
|
|
|
@section window_object Window objects
|
|
|
|
The @ref GLFWwindow object encapsulates both a window and a context. They are
|
|
created with @ref glfwCreateWindow and destroyed with @ref glfwDestroyWindow (or
|
|
@ref glfwTerminate, if any remain). As the window and context are inseparably
|
|
linked, the window handle (i.e. window object pointer) is used as a context
|
|
handle as well, for example when calling @ref glfwMakeContextCurrent.
|
|
|
|
|
|
@section window_hints Window hints
|
|
|
|
There are a number of hints that can be set before the creation of a window.
|
|
Some affect the window itself, others its framebuffer or context. These hints
|
|
are set to their default values each time the library is initialized with @ref
|
|
glfwInit, can be individually set with @ref glfwWindowHint and reset all at once
|
|
to their defaults with @ref glfwDefaultWindowHints.
|
|
|
|
Note again that they need to be set *before* the creation of the window you wish
|
|
to have the specified properties.
|
|
|
|
|
|
@subsection window_hints_hard Hard and soft constraints
|
|
|
|
Some window hints are hard constraints. These must match the available
|
|
capabilities *exactly* for window and context creation to succeed. Hints
|
|
that are not hard constraints are matched as closely as possible, but the
|
|
resulting window and context may differ from what these hints requested. To
|
|
find out the actual parameters of the created window and context, use the
|
|
@ref glfwGetWindowParam function.
|
|
|
|
The following hints are hard constraints:
|
|
- `GLFW_STEREO`
|
|
- `GLFW_CLIENT_API`
|
|
|
|
The following additional hints are hard constraints if requesting an OpenGL
|
|
context:
|
|
- `GLFW_OPENGL_FORWARD_COMPAT`
|
|
- `GLFW_OPENGL_PROFILE`
|
|
|
|
Hints that do not apply to a given type of window or context are ignored.
|
|
|
|
|
|
@subsection window_hints_fb Framebuffer related hints
|
|
|
|
The `GLFW_RED_BITS`, `GLFW_GREEN_BITS`, `GLFW_BLUE_BITS`, `GLFW_ALPHA_BITS`,
|
|
`GLFW_DEPTH_BITS` and `GLFW_STENCIL_BITS` hints specify the desired bit
|
|
depths of the various components of the default framebuffer.
|
|
|
|
The `GLFW_ACCUM_RED_BITS`, `GLFW_ACCUM_GREEN_BITS`, `GLFW_ACCUM_BLUE_BITS`
|
|
and `GLFW_ACCUM_ALPHA_BITS` hints specify the desired bit depths of the
|
|
various components of the accumulation buffer.
|
|
|
|
The `GLFW_AUX_BUFFERS` hint specifies the desired number of auxiliary
|
|
buffers.
|
|
|
|
The `GLFW_STEREO` hint specifies whether to use stereoscopic rendering.
|
|
|
|
The `GLFW_SAMPLES` hint specifies the desired number of samples to use for
|
|
multisampling. Zero disables multisampling.
|
|
|
|
The `GLFW_SRGB_CAPABLE` hint specifies whether the framebuffer should be
|
|
sRGB capable.
|
|
|
|
|
|
@subsection window_hints_ctx Context related hints
|
|
|
|
The `GLFW_CLIENT_API` hint specifies which client API to create the context
|
|
for. Possible values are `GLFW_OPENGL_API` and `GLFW_OPENGL_ES_API`.
|
|
|
|
The `GLFW_CONTEXT_VERSION_MAJOR` and `GLFW_CONTEXT_VERSION_MINOR` hints
|
|
specify the client API version that the created context must be compatible
|
|
with.
|
|
|
|
For OpenGL, these hints are *not* hard constraints, as they don't have to
|
|
match exactly, but @ref glfwCreateWindow will still fail if the resulting
|
|
OpenGL version is less than the one requested. It is therefore perfectly
|
|
safe to use the default of version 1.0 for legacy code and you may still
|
|
get backwards-compatible contexts of version 3.0 and above when available.
|
|
|
|
While there is no way to ask the driver for a context of the highest supported
|
|
version, most drivers provide this when you ask GLFW for a version
|
|
1.0 context.
|
|
|
|
For OpenGL ES, these hints are hard constraints.
|
|
|
|
If an OpenGL context is requested, the `GLFW_OPENGL_FORWARD_COMPAT` hint
|
|
specifies whether the OpenGL context should be forward-compatible, i.e. one
|
|
where all functionality deprecated in the requested version of OpenGL is
|
|
removed. This may only be used if the requested OpenGL version is 3.0 or
|
|
above. If another client API is requested, this hint is ignored.
|
|
|
|
If an OpenGL context is requested, the `GLFW_OPENGL_DEBUG_CONTEXT` hint
|
|
specifies whether to create a debug OpenGL context, which may have
|
|
additional error and performance issue reporting functionality. If another
|
|
client API is requested, this hint is ignored.
|
|
|
|
If an OpenGL context is requested, the `GLFW_OPENGL_PROFILE` hint specifies
|
|
which OpenGL profile to create the context for. Possible values are one of
|
|
`GLFW_OPENGL_CORE_PROFILE` or `GLFW_OPENGL_COMPAT_PROFILE`, or
|
|
`GLFW_OPENGL_NO_PROFILE` to not request a specific profile. If requesting
|
|
an OpenGL version below 3.2, `GLFW_OPENGL_NO_PROFILE` must be used. If
|
|
another client API is requested, this hint is ignored.
|
|
|
|
The `GLFW_CONTEXT_ROBUSTNESS` hint specifies the robustness strategy to be
|
|
used by the context. This can be one of `GLFW_NO_RESET_NOTIFICATION` or
|
|
`GLFW_LOSE_CONTEXT_ON_RESET`, or `GLFW_NO_ROBUSTNESS` to not request
|
|
a robustness strategy.
|
|
|
|
|
|
@subsection window_hints_wnd Window related hints
|
|
|
|
The `GLFW_RESIZABLE` hint specifies whether the window will be resizable *by the
|
|
user*. The window will still be resizable using the @ref glfwSetWindowSize
|
|
function. This hint is ignored for fullscreen windows.
|
|
|
|
The `GLFW_VISIBLE` hint specifies whether the window will be initially
|
|
visible. This hint is ignored for fullscreen windows.
|
|
|
|
The `GLFW_DECORATED` hint specifies whether the window will have window
|
|
decorations such as a border, a close widget, etc. This hint is ignored for
|
|
fullscreen windows. Note that even though a window may lack a close widget, it
|
|
is usually still possible for the user to generate close events.
|
|
|
|
|
|
@subsection window_hints_values Supported and default values
|
|
|
|
| Name | Default value | Supported values |
|
|
| ---------------------------- | ------------------------ | ----------------------- |
|
|
| `GLFW_RESIZABLE` | `GL_TRUE` | `GL_TRUE` or `GL_FALSE` |
|
|
| `GLFW_VISIBLE` | `GL_TRUE` | `GL_TRUE` or `GL_FALSE` |
|
|
| `GLFW_DECORATED` | `GL_TRUE` | `GL_TRUE` or `GL_FALSE` |
|
|
| `GLFW_RED_BITS` | 8 | 0 to `INT_MAX` |
|
|
| `GLFW_GREEN_BITS` | 8 | 0 to `INT_MAX` |
|
|
| `GLFW_BLUE_BITS` | 8 | 0 to `INT_MAX` |
|
|
| `GLFW_ALPHA_BITS` | 8 | 0 to `INT_MAX` |
|
|
| `GLFW_DEPTH_BITS` | 24 | 0 to `INT_MAX` |
|
|
| `GLFW_STENCIL_BITS` | 8 | 0 to `INT_MAX` |
|
|
| `GLFW_ACCUM_RED_BITS` | 0 | 0 to `INT_MAX` |
|
|
| `GLFW_ACCUM_GREEN_BITS` | 0 | 0 to `INT_MAX` |
|
|
| `GLFW_ACCUM_BLUE_BITS` | 0 | 0 to `INT_MAX` |
|
|
| `GLFW_ACCUM_ALPHA_BITS` | 0 | 0 to `INT_MAX` |
|
|
| `GLFW_AUX_BUFFERS` | 0 | 0 to `INT_MAX` |
|
|
| `GLFW_SAMPLES` | 0 | 0 to `INT_MAX` |
|
|
| `GLFW_STEREO` | `GL_FALSE` | `GL_TRUE` or `GL_FALSE` |
|
|
| `GLFW_SRGB_CAPABLE` | `GL_FALSE` | `GL_TRUE` or `GL_FALSE` |
|
|
| `GLFW_CLIENT_API` | `GLFW_OPENGL_API` | `GLFW_OPENGL_API` or `GLFW_OPENGL_ES_API` |
|
|
| `GLFW_CONTEXT_VERSION_MAJOR` | 1 | Any valid major version number of the chosen client API |
|
|
| `GLFW_CONTEXT_VERSION_MINOR` | 0 | Any valid minor version number of the chosen client API |
|
|
| `GLFW_CONTEXT_ROBUSTNESS` | `GLFW_NO_ROBUSTNESS` | `GLFW_NO_ROBUSTNESS`, `GLFW_NO_RESET_NOTIFICATION` or `GLFW_LOSE_CONTEXT_ON_RESET` |
|
|
| `GLFW_OPENGL_FORWARD_COMPAT` | `GL_FALSE` | `GL_TRUE` or `GL_FALSE` |
|
|
| `GLFW_OPENGL_DEBUG_CONTEXT` | `GL_FALSE` | `GL_TRUE` or `GL_FALSE` |
|
|
| `GLFW_OPENGL_PROFILE` | `GLFW_OPENGL_NO_PROFILE` | `GLFW_OPENGL_NO_PROFILE`, `GLFW_OPENGL_COMPAT_PROFILE` or `GLFW_OPENGL_CORE_PROFILE` |
|
|
|
|
|
|
@section window_closing Window closing
|
|
|
|
When the user attempts to close the window, for example by clicking the close
|
|
widget or using a key chord like Alt+F4, the window's close flag is set and then
|
|
its close callback is called. The window is not actually destroyed and, unless
|
|
you are monitoring the close flag, nothing further happens.
|
|
|
|
If you do not want the close flag to be set, it can be cleared again from the
|
|
close callback (or from any other point in your program) with @ref
|
|
glfwSetWindowShouldClose.
|
|
|
|
|
|
@section window_dims Window dimensions
|
|
|
|
Text here.
|
|
|
|
*/
|