Merge 1bd20df533 into 63a7e8b7f8

Fixes #2746

CONTRIBUTORS.md

@@ -55,6 +55,7 @@ video tutorials.
  - Jason Daly
  - danhambleton
  - Jarrod Davis
+ - decce
  - Olivier Delannoy
  - Paul R. Deppe
  - Michael Dickens
@@ -291,6 +292,7 @@ video tutorials.
  - Ryogo Yoshimura
  - Lukas Zanner
  - Andrey Zholos
+ - Tianlan Zhou
  - Aihui Zhu
  - Santi Zupancic
  - Jonas Ådahl

README.md

@@ -134,7 +134,6 @@ information on what to include when reporting a bug.
  - [Wayland] Bugfix: Ignore key repeat events when no window has keyboard focus (#2727)
  - [Wayland] Bugfix: Reset key repeat timer when window destroyed (#2741,#2727)
  - [Wayland] Bugfix: Memory would leak if reading a data offer failed midway
- - [Wayland] Bugfix: Keyboard leave event handler now processes key repeats (#2736)
  - [Wayland] Bugfix: Retrieved cursor position would be incorrect when hovering over
                      fallback decorations
  - [Wayland] Bugfix: Fallback decorations would report scroll events
@@ -149,6 +148,7 @@ information on what to include when reporting a bug.
  - [Null] Added EGL context creation on Mesa via `EGL_MESA_platform_surfaceless`
  - [EGL] Allowed native access on Wayland with `GLFW_CONTEXT_CREATION_API` set to
    `GLFW_NATIVE_CONTEXT_API` (#2518)
+ - Added `GLFW_ACCELERATION` window hint for hardware acceleration (#2491)
 
 
 ## Contact

docs/monitor.md

@@ -255,3 +255,7 @@ hardware gamma correction, which today is typically an approximation of sRGB
 gamma.  This means that setting a perfectly linear ramp, or gamma 1.0, will
 produce the default (usually sRGB-like) behavior.
 
+@note @wayland An application cannot read or modify the monitor gamma ramp.  The
+@ref glfwGetGammaRamp, @ref glfwSetGammaRamp and @ref glfwSetGamma functions
+emit @ref GLFW_FEATURE_UNAVAILABLE.
+

docs/news.md

@@ -14,8 +14,25 @@ values over 8. For compatibility with older versions, the
 @ref GLFW_UNLIMITED_MOUSE_BUTTONS input mode needs to be set to make use of
 this.
 
+### Window hint for hardware acceleration {#acceleration}
+
+You can use window hint [GLFW_ACCELERATION](@ref GLFW_ACCELERATION_hint) to
+specify whether hardware acceleration is preferred or not.  The default value
+is to prefer hardware acceleration.  You can get whether hardware acceleration
+is enabled with the window attribute
+[GLFW_ACCELERATION](@ref GLFW_ACCELERATION_attrib).  This feature is only
+available on WGL currently.
+
+
 ## Caveats {#caveats}
 
+### Microsoft GDI software OpenGL ICD support {#gdi_opengl_icd}
+
+GLFW now supports creating window when the Microsoft GDI software OpenGL ICD is
+the only available implementation.
+See [GLFW_ACCELERATION](@ref GLFW_ACCELERATION_hint) for more details.
+
+
 ## Deprecations {#deprecations}
 
 ## Removals {#removals}
@@ -52,4 +69,3 @@ actively maintained and available on many platforms.
 - [Release notes for 3.2](https://www.glfw.org/docs/3.2/news.html)
 - [Release notes for 3.1](https://www.glfw.org/docs/3.1/news.html)
 - [Release notes for 3.0](https://www.glfw.org/docs/3.0/news.html)
-

docs/window.md

@@ -336,6 +336,15 @@ __GLFW_DOUBLEBUFFER__ specifies whether the framebuffer should be double
 buffered.  You nearly always want to use double buffering.  This is a hard
 constraint.  Possible values are `GLFW_TRUE` and `GLFW_FALSE`.
 
+@anchor GLFW_ACCELERATION
+@anchor GLFW_ACCELERATION_hint
+__GLFW_ACCELERATION__ specifies whether the hardware acceleration should be
+preferred.  By default, hardware acceleration is preferred, and will fallback
+to no acceleration if hardware acceleration is unavailable.  Possible values
+are `GLFW_TRUE` and `GLFW_FALSE`.
+
+This hint only has an effect on WGL.
+
 
 #### Monitor related hints {#window_hints_mtr}
 
@@ -893,6 +902,12 @@ int xpos, ypos;
 glfwGetWindowPos(window, &xpos, &ypos);
 ```
 
+@note @wayland An applications cannot know the positions of its windows or
+whether one has been moved.  The @ref GLFW_POSITION_X and @ref GLFW_POSITION_Y
+window hints are ignored.  The @ref glfwGetWindowPos and @ref glfwSetWindowPos
+functions emit @ref GLFW_FEATURE_UNAVAILABLE.  The window position callback will
+not be called.
+
 
 ### Window title {#window_title}
 
@@ -1038,6 +1053,12 @@ You can also get the current iconification state with @ref glfwGetWindowAttrib.
 int iconified = glfwGetWindowAttrib(window, GLFW_ICONIFIED);
 ```
 
+@note @wayland An application cannot know if any of its windows have been
+iconified or restore one from iconification.  The @ref glfwRestoreWindow
+function can only restore windows from maximization and the iconify callback
+will not be called.  The [GLFW_ICONIFIED](@ref GLFW_ICONIFIED_attrib) attribute
+will be false.  The @ref glfwIconifyWindow function works normally.
+
 
 ### Window maximization {#window_maximize}
 
@@ -1487,6 +1508,11 @@ __GLFW_DOUBLEBUFFER__ indicates whether the specified window is double-buffered
 when rendering with OpenGL or OpenGL ES.  This can be set before creation with
 the [GLFW_DOUBLEBUFFER](@ref GLFW_DOUBLEBUFFER_hint) window hint.
 
+@anchor GLFW_ACCELERATION_attrib
+__GLFW_ACCELERATION__ indicates whether the specified window is hardware
+accelerated when rendering with OpenGL or OpenGL ES.  This can be set before
+creation with the [GLFW_ACCELERATION](@ref GLFW_ACCELERATION_hint) window hint.
+
 
 ## Buffer swapping {#buffer_swap}
 

include/GLFW/glfw3.h

@@ -1022,6 +1022,14 @@ extern "C" {
  *  [attribute](@ref GLFW_DOUBLEBUFFER_attrib).
  */
 #define GLFW_DOUBLEBUFFER           0x00021010
+/*! @brief Hardware acceleration hint.
+ *
+ *  Hardware acceleration [hint](@ref GLFW_ACCELERATION_hint) and
+ *  [attribute](@ref GLFW_ACCELERATION_attrib).
+ *
+ *  @since Added in version 3.4.
+ */
+#define GLFW_ACCELERATION           0x00021011
 
 /*! @brief Context client API hint and attribute.
  *
@@ -2915,8 +2923,8 @@ GLFWAPI const GLFWvidmode* glfwGetVideoMode(GLFWmonitor* monitor);
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref GLFW_INVALID_VALUE,
  *  @ref GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
- *  @remark @wayland Gamma handling is a privileged protocol, this function
- *  will thus never be implemented and emits @ref GLFW_FEATURE_UNAVAILABLE.
+ *  @remark @wayland Monitor gamma is a privileged protocol, so this function
+ *  cannot be implemented and emits @ref GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -2939,8 +2947,8 @@ GLFWAPI void glfwSetGamma(GLFWmonitor* monitor, float gamma);
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref GLFW_PLATFORM_ERROR
  *  and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
- *  @remark @wayland Gamma handling is a privileged protocol, this function
- *  will thus never be implemented and emits @ref GLFW_FEATURE_UNAVAILABLE while
+ *  @remark @wayland Monitor gamma is a privileged protocol, so this function
+ *  cannot be implemented and emits @ref GLFW_FEATURE_UNAVAILABLE while
  *  returning `NULL`.
  *
  *  @pointer_lifetime The returned structure and its arrays are allocated and
@@ -2983,8 +2991,8 @@ GLFWAPI const GLFWgammaramp* glfwGetGammaRamp(GLFWmonitor* monitor);
  *
  *  @remark @win32 The gamma ramp size must be 256.
  *
- *  @remark @wayland Gamma handling is a privileged protocol, this function
- *  will thus never be implemented and emits @ref GLFW_FEATURE_UNAVAILABLE.
+ *  @remark @wayland Monitor gamma is a privileged protocol, so this function
+ *  cannot be implemented and emits @ref GLFW_FEATURE_UNAVAILABLE.
  *
  *  @pointer_lifetime The specified gamma ramp is copied before this function
  *  returns.
@@ -3159,9 +3167,6 @@ GLFWAPI void glfwWindowHintString(int hint, const char* value);
  *  GLFW_VERSION_UNAVAILABLE, @ref GLFW_FORMAT_UNAVAILABLE, @ref
  *  GLFW_NO_WINDOW_CONTEXT and @ref GLFW_PLATFORM_ERROR.
  *
- *  @remark @win32 Window creation will fail if the Microsoft GDI software
- *  OpenGL implementation is the only one available.
- *
  *  @remark @win32 If the executable has an icon resource named `GLFW_ICON,` it
  *  will be set as the initial icon for the window.  If no such icon is present,
  *  the `IDI_APPLICATION` icon will be used instead.  To set a different icon,
@@ -3430,8 +3435,8 @@ GLFWAPI void glfwSetWindowIcon(GLFWwindow* window, int count, const GLFWimage* i
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
  *  GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
- *  @remark @wayland There is no way for an application to retrieve the global
- *  position of its windows.  This function will emit @ref
+ *  @remark @wayland Window positions are not currently part of any common
+ *  Wayland protocol, so this function cannot be implemented and will emit @ref
  *  GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
@@ -3464,8 +3469,8 @@ GLFWAPI void glfwGetWindowPos(GLFWwindow* window, int* xpos, int* ypos);
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED, @ref
  *  GLFW_PLATFORM_ERROR and @ref GLFW_FEATURE_UNAVAILABLE (see remarks).
  *
- *  @remark @wayland There is no way for an application to set the global
- *  position of its windows.  This function will emit @ref
+ *  @remark @wayland Window positions are not currently part of any common
+ *  Wayland protocol, so this function cannot be implemented and will emit @ref
  *  GLFW_FEATURE_UNAVAILABLE.
  *
  *  @thread_safety This function must only be called from the main thread.
@@ -3807,10 +3812,6 @@ GLFWAPI void glfwSetWindowOpacity(GLFWwindow* window, float opacity);
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
  *  GLFW_PLATFORM_ERROR.
  *
- *  @remark @wayland Once a window is iconified, @ref glfwRestoreWindow won’t
- *  be able to restore it.  This is a design decision of the xdg-shell
- *  protocol.
- *
  *  @thread_safety This function must only be called from the main thread.
  *
  *  @sa @ref window_iconify
@@ -3838,6 +3839,10 @@ GLFWAPI void glfwIconifyWindow(GLFWwindow* window);
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
  *  GLFW_PLATFORM_ERROR.
  *
+ *  @remark @wayland Restoring a window from maximization is not currently part
+ *  of any common Wayland protocol, so this function can only restore windows
+ *  from maximization.
+ *
  *  @thread_safety This function must only be called from the main thread.
  *
  *  @sa @ref window_iconify
@@ -4058,8 +4063,8 @@ GLFWAPI GLFWmonitor* glfwGetWindowMonitor(GLFWwindow* window);
  *  affected by any resizing or mode switching, although you may need to update
  *  your viewport if the framebuffer size has changed.
  *
- *  @remark @wayland The desired window position is ignored, as there is no way
- *  for an application to set this property.
+ *  @remark @wayland Window positions are not currently part of any common
+ *  Wayland protocol.  The window position arguments are ignored.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -4096,8 +4101,9 @@ GLFWAPI void glfwSetWindowMonitor(GLFWwindow* window, GLFWmonitor* monitor, int
  *  errors.  However, this function should not fail as long as it is passed
  *  valid arguments and the library has been [initialized](@ref intro_init).
  *
- *  @remark @wayland The Wayland protocol provides no way to check whether a
- *  window is iconfied, so @ref GLFW_ICONIFIED always returns `GLFW_FALSE`.
+ *  @remark @wayland Checking whether a window is iconified is not currently
+ *  part of any common Wayland protocol, so the @ref GLFW_ICONIFIED attribute
+ *  cannot be implemented and is always `GLFW_FALSE`.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -4219,8 +4225,8 @@ GLFWAPI void* glfwGetWindowUserPointer(GLFWwindow* window);
  *
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
  *
- *  @remark @wayland This callback will never be called, as there is no way for
- *  an application to know its global position.
+ *  @remark @wayland This callback will not be called.  The Wayland protocol
+ *  provides no way to be notified of when a window is moved.
  *
  *  @thread_safety This function must only be called from the main thread.
  *
@@ -4395,6 +4401,10 @@ GLFWAPI GLFWwindowfocusfun glfwSetWindowFocusCallback(GLFWwindow* window, GLFWwi
  *
  *  @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
  *
+ *  @remark @wayland This callback will not be called.  The Wayland protocol
+ *  provides no way to be notified of when a window is iconified, and no way to
+ *  check whether a window is currently iconified.
+ *
  *  @thread_safety This function must only be called from the main thread.
  *
  *  @sa @ref window_iconify

src/context.c

@@ -28,10 +28,10 @@
 #include "internal.h"
 
 #include <assert.h>
+#include <limits.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <string.h>
-#include <limits.h>
-#include <stdio.h>
 
 
 //////////////////////////////////////////////////////////////////////////
@@ -185,6 +185,7 @@ const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
                                          unsigned int count)
 {
     unsigned int i;
+    bool accelerationMatch, closestAccelerationMatch = false;
     unsigned int missing, leastMissing = UINT_MAX;
     unsigned int colorDiff, leastColorDiff = UINT_MAX;
     unsigned int extraDiff, leastExtraDiff = UINT_MAX;
@@ -201,6 +202,8 @@ const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
             continue;
         }
 
+        accelerationMatch = desired->acceleration == current->acceleration;
+
         // Count number of missing buffers
         {
             missing = 0;
@@ -318,19 +321,25 @@ const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
         // Least number of missing buffers is the most important heuristic,
         // then color buffer size match and lastly size match for other buffers
 
-        if (missing < leastMissing)
+        if (accelerationMatch && !closestAccelerationMatch)
             closest = current;
-        else if (missing == leastMissing)
+        else if (accelerationMatch == closestAccelerationMatch)
         {
-            if ((colorDiff < leastColorDiff) ||
-                (colorDiff == leastColorDiff && extraDiff < leastExtraDiff))
-            {
+            if (missing < leastMissing)
                 closest = current;
+            else if (missing == leastMissing)
+            {
+                if ((colorDiff < leastColorDiff) ||
+                    (colorDiff == leastColorDiff && extraDiff < leastExtraDiff))
+                {
+                    closest = current;
+                }
             }
         }
 
         if (current == closest)
         {
+            closestAccelerationMatch = accelerationMatch;
             leastMissing = missing;
             leastColorDiff = colorDiff;
             leastExtraDiff = extraDiff;

src/internal.h

@@ -481,6 +481,7 @@ struct _GLFWfbconfig
     GLFWbool    sRGB;
     GLFWbool    doublebuffer;
     GLFWbool    transparent;
+    GLFWbool    acceleration;
     uintptr_t   handle;
 };
 
@@ -541,6 +542,7 @@ struct _GLFWwindow
     GLFWbool            shouldClose;
     void*               userPointer;
     GLFWbool            doublebuffer;
+    GLFWbool            acceleration;
     GLFWvidmode         videoMode;
     _GLFWmonitor*       monitor;
     _GLFWcursor*        cursor;

src/wgl_context.c

@@ -145,6 +145,8 @@ static int choosePixelFormatWGL(_GLFWwindow* window,
         {
             // Get pixel format attributes through "modern" extension
 
+            int acceleration;
+
             if (!wglGetPixelFormatAttribivARB(window->context.wgl.dc,
                                               pixelFormat, 0,
                                               attribCount,
@@ -166,12 +168,11 @@ static int choosePixelFormatWGL(_GLFWwindow* window,
             if (FIND_ATTRIB_VALUE(WGL_PIXEL_TYPE_ARB) != WGL_TYPE_RGBA_ARB)
                 continue;
 
-            if (FIND_ATTRIB_VALUE(WGL_ACCELERATION_ARB) == WGL_NO_ACCELERATION_ARB)
-                continue;
-
             if (FIND_ATTRIB_VALUE(WGL_DOUBLE_BUFFER_ARB) != fbconfig->doublebuffer)
                 continue;
 
+            acceleration = FIND_ATTRIB_VALUE(WGL_ACCELERATION_ARB);
+
             u->redBits = FIND_ATTRIB_VALUE(WGL_RED_BITS_ARB);
             u->greenBits = FIND_ATTRIB_VALUE(WGL_GREEN_BITS_ARB);
             u->blueBits = FIND_ATTRIB_VALUE(WGL_BLUE_BITS_ARB);
@@ -210,6 +211,10 @@ static int choosePixelFormatWGL(_GLFWwindow* window,
                         u->sRGB = GLFW_TRUE;
                 }
             }
+
+            u->acceleration =
+                acceleration == WGL_GENERIC_ACCELERATION_ARB ||
+                acceleration == WGL_FULL_ACCELERATION_ARB;
         }
         else
         {
@@ -235,12 +240,6 @@ static int choosePixelFormatWGL(_GLFWwindow* window,
                 continue;
             }
 
-            if (!(pfd.dwFlags & PFD_GENERIC_ACCELERATED) &&
-                (pfd.dwFlags & PFD_GENERIC_FORMAT))
-            {
-                continue;
-            }
-
             if (pfd.iPixelType != PFD_TYPE_RGBA)
                 continue;
 
@@ -264,6 +263,10 @@ static int choosePixelFormatWGL(_GLFWwindow* window,
 
             if (pfd.dwFlags & PFD_STEREO)
                 u->stereo = GLFW_TRUE;
+
+            u->acceleration =
+                (pfd.dwFlags & PFD_GENERIC_ACCELERATED) ||
+                !(pfd.dwFlags & PFD_GENERIC_FORMAT);
         }
 
         u->handle = pixelFormat;
@@ -437,8 +440,6 @@ GLFWbool _glfwInitWGL(void)
 
     // NOTE: A dummy context has to be created for opengl32.dll to load the
     //       OpenGL ICD, from which we can then query WGL extensions
-    // NOTE: This code will accept the Microsoft GDI ICD; accelerated context
-    //       creation failure occurs during manual pixel format enumeration
 
     dc = GetDC(_glfw.win32.helperWindowHandle);
 

src/win32_platform.h

@@ -172,6 +172,8 @@ typedef enum
 #define WGL_TYPE_RGBA_ARB 0x202b
 #define WGL_ACCELERATION_ARB 0x2003
 #define WGL_NO_ACCELERATION_ARB 0x2025
+#define WGL_GENERIC_ACCELERATION_ARB 0x2026
+#define WGL_FULL_ACCELERATION_ARB 0x2027
 #define WGL_RED_BITS_ARB 0x2015
 #define WGL_RED_SHIFT_ARB 0x2016
 #define WGL_GREEN_BITS_ARB 0x2017

src/window.c

@@ -235,6 +235,7 @@ GLFWAPI GLFWwindow* glfwCreateWindow(int width, int height,
     window->cursorMode       = GLFW_CURSOR_NORMAL;
 
     window->doublebuffer = fbconfig.doublebuffer;
+    window->acceleration = fbconfig.acceleration;
 
     window->minwidth    = GLFW_DONT_CARE;
     window->minheight   = GLFW_DONT_CARE;
@@ -287,6 +288,7 @@ void glfwDefaultWindowHints(void)
     _glfw.hints.framebuffer.depthBits    = 24;
     _glfw.hints.framebuffer.stencilBits  = 8;
     _glfw.hints.framebuffer.doublebuffer = GLFW_TRUE;
+    _glfw.hints.framebuffer.acceleration = GLFW_TRUE;
 
     // The default is to select the highest available refresh rate
     _glfw.hints.refreshRate = GLFW_DONT_CARE;
@@ -346,6 +348,9 @@ GLFWAPI void glfwWindowHint(int hint, int value)
         case GLFW_SRGB_CAPABLE:
             _glfw.hints.framebuffer.sRGB = value ? GLFW_TRUE : GLFW_FALSE;
             return;
+        case GLFW_ACCELERATION:
+            _glfw.hints.framebuffer.acceleration = value ? GLFW_TRUE : GLFW_FALSE;
+            return;
         case GLFW_RESIZABLE:
             _glfw.hints.window.resizable = value ? GLFW_TRUE : GLFW_FALSE;
             return;
@@ -912,6 +917,8 @@ GLFWAPI int glfwGetWindowAttrib(GLFWwindow* handle, int attrib)
             return window->autoIconify;
         case GLFW_DOUBLEBUFFER:
             return window->doublebuffer;
+        case GLFW_ACCELERATION:
+            return window->acceleration;
         case GLFW_CLIENT_API:
             return window->context.client;
         case GLFW_CONTEXT_CREATION_API:

tests/glfwinfo.c

@@ -383,6 +383,7 @@ int main(int argc, char** argv)
     int angle_type = GLFW_ANGLE_PLATFORM_TYPE_NONE;
     bool cocoa_graphics_switching = false;
     bool disable_xcb_surface = false;
+    bool acceleration = true;
 
     enum { PLATFORM, CLIENT, CONTEXT, BEHAVIOR, DEBUG_CONTEXT, FORWARD, HELP,
            EXTENSIONS, LAYERS,
@@ -390,7 +391,7 @@ int main(int argc, char** argv)
            REDBITS, GREENBITS, BLUEBITS, ALPHABITS, DEPTHBITS, STENCILBITS,
            ACCUMREDBITS, ACCUMGREENBITS, ACCUMBLUEBITS, ACCUMALPHABITS,
            AUXBUFFERS, SAMPLES, STEREO, SRGB, SINGLEBUFFER, NOERROR_SRSLY,
-           ANGLE_TYPE, GRAPHICS_SWITCHING, XCB_SURFACE };
+           ANGLE_TYPE, GRAPHICS_SWITCHING, XCB_SURFACE, NO_ACCELERATION };
     const struct option options[] =
     {
         { "platform",           1, NULL, PLATFORM },
@@ -426,6 +427,7 @@ int main(int argc, char** argv)
         { "angle-type",         1, NULL, ANGLE_TYPE },
         { "graphics-switching", 0, NULL, GRAPHICS_SWITCHING },
         { "vk-xcb-surface",     0, NULL, XCB_SURFACE },
+        { "no-acceleration",    0, NULL, NO_ACCELERATION },
         { NULL, 0, NULL, 0 }
     };
 
@@ -654,6 +656,9 @@ int main(int argc, char** argv)
             case XCB_SURFACE:
                 disable_xcb_surface = true;
                 break;
+            case NO_ACCELERATION:
+                acceleration = false;
+                break;
             default:
                 usage();
                 exit(EXIT_FAILURE);
@@ -708,6 +713,7 @@ int main(int argc, char** argv)
     glfwWindowHint(GLFW_STEREO, fb_stereo);
     glfwWindowHint(GLFW_SRGB_CAPABLE, fb_srgb);
     glfwWindowHint(GLFW_DOUBLEBUFFER, fb_doublebuffer);
+    glfwWindowHint(GLFW_ACCELERATION, acceleration);
 
     glfwWindowHint(GLFW_COCOA_GRAPHICS_SWITCHING, cocoa_graphics_switching);