d066e7541e
The existence of OpenGL implementations that do not provide the full core profile compatibility because of reasons beyond the technical, like llvmpipe not implementing floating point buffers, makes the existence of GdkGLProfile and documenting the fact that we use core profiles a bit harder. Since we do not have any existing profile except the default, we can remove the GdkGLProfile and its related API from GDK and GTK+, and sweep the whole thing under the carpet, while we wait for an extension that lets us ask for the most compatible profile possible. https://bugzilla.gnome.org/show_bug.cgi?id=744407
663 lines
19 KiB
C
663 lines
19 KiB
C
/* GDK - The GIMP Drawing Kit
|
|
*
|
|
* gdkglcontext-win32.c: Win32 specific OpenGL wrappers
|
|
*
|
|
* Copyright © 2014 Emmanuele Bassi
|
|
* Copyright © 2014 Alexander Larsson
|
|
* Copyright © 2014 Chun-wei Fan
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include "gdkprivate-win32.h"
|
|
#include "gdkwindow-win32.h"
|
|
#include "gdkglcontext-win32.h"
|
|
#include "gdkdisplay-win32.h"
|
|
|
|
#include "gdkwin32display.h"
|
|
#include "gdkwin32glcontext.h"
|
|
#include "gdkwin32misc.h"
|
|
#include "gdkwin32screen.h"
|
|
#include "gdkwin32window.h"
|
|
|
|
#include "gdkglcontext.h"
|
|
#include "gdkwindow.h"
|
|
#include "gdkinternals.h"
|
|
#include "gdkintl.h"
|
|
|
|
#include <cairo.h>
|
|
#include <epoxy/wgl.h>
|
|
|
|
G_DEFINE_TYPE (GdkWin32GLContext, gdk_win32_gl_context, GDK_TYPE_GL_CONTEXT)
|
|
|
|
static void
|
|
_gdk_win32_gl_context_dispose (GObject *gobject)
|
|
{
|
|
GdkGLContext *context = GDK_GL_CONTEXT (gobject);
|
|
GdkWin32GLContext *context_win32 = GDK_WIN32_GL_CONTEXT (gobject);
|
|
GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (gdk_gl_context_get_display (context));
|
|
|
|
if (context_win32->hglrc != NULL)
|
|
{
|
|
if (wglGetCurrentContext () == context_win32->hglrc)
|
|
wglMakeCurrent (NULL, NULL);
|
|
|
|
GDK_NOTE (OPENGL, g_print ("Destroying WGL context\n"));
|
|
|
|
wglDeleteContext (context_win32->hglrc);
|
|
context_win32->hglrc = NULL;
|
|
|
|
ReleaseDC (display_win32->gl_hwnd, context_win32->gl_hdc);
|
|
}
|
|
|
|
G_OBJECT_CLASS (gdk_win32_gl_context_parent_class)->dispose (gobject);
|
|
}
|
|
|
|
static void
|
|
gdk_win32_gl_context_class_init (GdkWin32GLContextClass *klass)
|
|
{
|
|
GdkGLContextClass *context_class = GDK_GL_CONTEXT_CLASS (klass);
|
|
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
|
|
|
|
context_class->end_frame = _gdk_win32_gl_context_end_frame;
|
|
context_class->realize = _gdk_win32_gl_context_realize;
|
|
|
|
gobject_class->dispose = _gdk_win32_gl_context_dispose;
|
|
}
|
|
|
|
static void
|
|
gdk_win32_gl_context_init (GdkWin32GLContext *self)
|
|
{
|
|
}
|
|
|
|
static void
|
|
gdk_gl_blit_region (GdkWindow *window, cairo_region_t *region)
|
|
{
|
|
int n_rects, i;
|
|
int scale = gdk_window_get_scale_factor (window);
|
|
int wh = gdk_window_get_height (window);
|
|
cairo_rectangle_int_t rect;
|
|
|
|
n_rects = cairo_region_num_rectangles (region);
|
|
for (i = 0; i < n_rects; i++)
|
|
{
|
|
cairo_region_get_rectangle (region, i, &rect);
|
|
glScissor (rect.x * scale, (wh - rect.y - rect.height) * scale, rect.width * scale, rect.height * scale);
|
|
glBlitFramebuffer (rect.x * scale, (wh - rect.y - rect.height) * scale, (rect.x + rect.width) * scale, (wh - rect.y) * scale,
|
|
rect.x * scale, (wh - rect.y - rect.height) * scale, (rect.x + rect.width) * scale, (wh - rect.y) * scale,
|
|
GL_COLOR_BUFFER_BIT, GL_NEAREST);
|
|
}
|
|
}
|
|
|
|
void
|
|
_gdk_win32_gl_context_end_frame (GdkGLContext *context,
|
|
cairo_region_t *painted,
|
|
cairo_region_t *damage)
|
|
{
|
|
GdkWin32GLContext *context_win32 = GDK_WIN32_GL_CONTEXT (context);
|
|
GdkWindow *window = gdk_gl_context_get_window (context);
|
|
GdkWin32Display *display = (GDK_WIN32_DISPLAY (gdk_gl_context_get_display (context)));
|
|
|
|
gboolean can_wait = display->hasWglOMLSyncControl;
|
|
gdk_gl_context_make_current (context);
|
|
|
|
if (context_win32->do_frame_sync)
|
|
{
|
|
guint32 end_frame_counter = 0;
|
|
|
|
if (context_win32->do_frame_sync)
|
|
{
|
|
glFinish ();
|
|
|
|
if (can_wait)
|
|
{
|
|
gint64 ust, msc, sbc;
|
|
|
|
wglGetSyncValuesOML (context_win32->gl_hdc, &ust, &msc, &sbc);
|
|
wglWaitForMscOML (context_win32->gl_hdc,
|
|
0,
|
|
2,
|
|
(msc + 1) % 2,
|
|
&ust, &msc, &sbc);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (context_win32->do_blit_swap)
|
|
{
|
|
glDrawBuffer(GL_FRONT);
|
|
glReadBuffer(GL_BACK);
|
|
gdk_gl_blit_region (window, painted);
|
|
glDrawBuffer(GL_BACK);
|
|
glFlush();
|
|
|
|
if (gdk_gl_context_has_frame_terminator (context))
|
|
glFrameTerminatorGREMEDY ();
|
|
}
|
|
else
|
|
SwapBuffers (context_win32->gl_hdc);
|
|
}
|
|
|
|
void
|
|
_gdk_win32_window_invalidate_for_new_frame (GdkWindow *window,
|
|
cairo_region_t *update_area)
|
|
{
|
|
cairo_rectangle_int_t window_rect;
|
|
unsigned int buffer_age;
|
|
gboolean invalidate_all = FALSE;
|
|
GdkWin32GLContext *context_win32;
|
|
cairo_rectangle_int_t whole_window = { 0, 0, gdk_window_get_width (window), gdk_window_get_height (window) };
|
|
|
|
/* Minimal update is ok if we're not drawing with gl */
|
|
if (window->gl_paint_context == NULL)
|
|
return;
|
|
|
|
context_win32 = GDK_WIN32_GL_CONTEXT (window->gl_paint_context);
|
|
context_win32->do_blit_swap = FALSE;
|
|
|
|
if (gdk_gl_context_has_framebuffer_blit (window->gl_paint_context) &&
|
|
cairo_region_contains_rectangle (update_area, &whole_window) != CAIRO_REGION_OVERLAP_IN)
|
|
{
|
|
context_win32->do_blit_swap = TRUE;
|
|
}
|
|
else
|
|
invalidate_all = TRUE;
|
|
|
|
if (invalidate_all)
|
|
{
|
|
window_rect.x = 0;
|
|
window_rect.y = 0;
|
|
window_rect.width = gdk_window_get_width (window);
|
|
window_rect.height = gdk_window_get_height (window);
|
|
|
|
/* If nothing else is known, repaint everything so that the back
|
|
buffer is fully up-to-date for the swapbuffer */
|
|
cairo_region_union_rectangle (update_area, &window_rect);
|
|
}
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
ATOM wc_atom;
|
|
HWND hwnd;
|
|
HDC hdc;
|
|
HGLRC hglrc;
|
|
gboolean inited;
|
|
} GdkWGLDummy;
|
|
|
|
static void
|
|
_destroy_dummy_gl_context (GdkWGLDummy dummy)
|
|
{
|
|
if (dummy.hglrc != NULL)
|
|
{
|
|
if (wglGetCurrentContext () == dummy.hglrc)
|
|
wglMakeCurrent (NULL, NULL);
|
|
wglDeleteContext (dummy.hglrc);
|
|
dummy.hglrc = NULL;
|
|
}
|
|
if (dummy.hdc != NULL)
|
|
{
|
|
DeleteDC (dummy.hdc);
|
|
dummy.hdc = NULL;
|
|
}
|
|
if (dummy.hwnd != NULL)
|
|
{
|
|
DestroyWindow (dummy.hwnd);
|
|
dummy.hwnd = NULL;
|
|
}
|
|
if (dummy.wc_atom != 0)
|
|
{
|
|
UnregisterClass (MAKEINTATOM (dummy.wc_atom), GetModuleHandle (NULL));
|
|
dummy.wc_atom = 0;
|
|
}
|
|
dummy.inited = FALSE;
|
|
}
|
|
|
|
/* Yup, we need to create a dummy window for the dummy WGL context */
|
|
static void
|
|
_get_dummy_window_hwnd (GdkWGLDummy *dummy)
|
|
{
|
|
WNDCLASSEX dummy_wc;
|
|
HWND dummy_hwnd;
|
|
|
|
memset (&dummy_wc, 0, sizeof (WNDCLASSEX));
|
|
|
|
dummy_wc.cbSize = sizeof( WNDCLASSEX );
|
|
dummy_wc.style = CS_OWNDC;
|
|
dummy_wc.lpfnWndProc = (WNDPROC) DefWindowProc;
|
|
dummy_wc.cbClsExtra = 0;
|
|
dummy_wc.cbWndExtra = 0;
|
|
dummy_wc.hInstance = GetModuleHandle( NULL );
|
|
dummy_wc.hIcon = 0;
|
|
dummy_wc.hCursor = NULL;
|
|
dummy_wc.hbrBackground = 0;
|
|
dummy_wc.lpszMenuName = 0;
|
|
dummy_wc.lpszClassName = "dummy";
|
|
dummy_wc.hIconSm = 0;
|
|
|
|
dummy->wc_atom = RegisterClassEx (&dummy_wc);
|
|
|
|
dummy->hwnd =
|
|
CreateWindowEx (WS_EX_APPWINDOW,
|
|
MAKEINTATOM (dummy->wc_atom),
|
|
"",
|
|
WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN | WS_CLIPSIBLINGS,
|
|
0,
|
|
0,
|
|
0,
|
|
0,
|
|
NULL,
|
|
NULL,
|
|
GetModuleHandle (NULL),
|
|
NULL);
|
|
}
|
|
|
|
static gint
|
|
_get_wgl_pfd (HDC hdc,
|
|
const gboolean need_alpha_bits,
|
|
PIXELFORMATDESCRIPTOR *pfd)
|
|
{
|
|
gint configs;
|
|
gint i;
|
|
gint best_pf = 0;
|
|
gboolean alpha_check;
|
|
|
|
pfd->nSize = sizeof (PIXELFORMATDESCRIPTOR);
|
|
pfd->nVersion = 1;
|
|
pfd->dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER;
|
|
pfd->iPixelType = PFD_TYPE_RGBA;
|
|
pfd->cColorBits = GetDeviceCaps (hdc, BITSPIXEL);
|
|
pfd->cAlphaBits = 8;
|
|
pfd->dwLayerMask = PFD_MAIN_PLANE;
|
|
|
|
best_pf = ChoosePixelFormat (hdc, pfd);
|
|
|
|
if (best_pf == 0)
|
|
/* give another chance if need_alpha_bits is FALSE,
|
|
* meaning we prefer to have an alpha channel anyways
|
|
*/
|
|
if (!need_alpha_bits)
|
|
{
|
|
pfd->cAlphaBits = 0;
|
|
best_pf = ChoosePixelFormat (hdc, pfd);
|
|
}
|
|
|
|
return best_pf;
|
|
}
|
|
|
|
/* in WGL, for many OpenGL items, we need a dummy WGL context, so create
|
|
* one and cache it for later use
|
|
*/
|
|
static gint
|
|
_gdk_init_dummy_context (GdkWGLDummy *dummy,
|
|
const gboolean need_alpha_bits)
|
|
{
|
|
PIXELFORMATDESCRIPTOR pfd;
|
|
gboolean set_pixel_format_result = FALSE;
|
|
gint best_idx = 0;
|
|
|
|
_get_dummy_window_hwnd (dummy);
|
|
|
|
dummy->hdc = GetDC (dummy->hwnd);
|
|
memset (&pfd, 0, sizeof (PIXELFORMATDESCRIPTOR));
|
|
|
|
best_idx = _get_wgl_pfd (dummy->hdc, need_alpha_bits, &pfd);
|
|
|
|
if (best_idx != 0)
|
|
set_pixel_format_result = SetPixelFormat (dummy->hdc,
|
|
best_idx,
|
|
&pfd);
|
|
|
|
if (best_idx == 0 || !set_pixel_format_result)
|
|
return 0;
|
|
|
|
dummy->hglrc = wglCreateContext (dummy->hdc);
|
|
if (dummy->hglrc == NULL)
|
|
return 0;
|
|
|
|
dummy->inited = TRUE;
|
|
|
|
return best_idx;
|
|
}
|
|
|
|
gboolean
|
|
_gdk_win32_display_init_gl (GdkDisplay *display,
|
|
const gboolean need_alpha_bits)
|
|
{
|
|
GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (display);
|
|
gint glMajMinVersion;
|
|
GdkWindowImplWin32 *impl;
|
|
gint best_idx = 0;
|
|
GdkWGLDummy dummy;
|
|
|
|
if (display_win32->have_wgl)
|
|
return TRUE;
|
|
|
|
memset (&dummy, 0, sizeof (GdkWGLDummy));
|
|
|
|
/* acquire and cache dummy Window (HWND & HDC) and
|
|
* dummy GL Context, it is used to query functions
|
|
* and used for other stuff as well
|
|
*/
|
|
best_idx = _gdk_init_dummy_context (&dummy, need_alpha_bits);
|
|
|
|
if (best_idx == 0 || !wglMakeCurrent (dummy.hdc, dummy.hglrc))
|
|
return FALSE;
|
|
|
|
display_win32->have_wgl = TRUE;
|
|
display_win32->gl_version = epoxy_gl_version ();
|
|
|
|
display_win32->hasWglARBCreateContext =
|
|
epoxy_has_wgl_extension (dummy.hdc, "WGL_ARB_create_context");
|
|
display_win32->hasWglEXTSwapControl =
|
|
epoxy_has_wgl_extension (dummy.hdc, "WGL_EXT_swap_control");
|
|
display_win32->hasWglOMLSyncControl =
|
|
epoxy_has_wgl_extension (dummy.hdc, "WGL_OML_sync_control");
|
|
|
|
GDK_NOTE (OPENGL,
|
|
g_print ("WGL API version %d.%d found\n"
|
|
" - Vendor: %s\n"
|
|
" - Checked extensions:\n"
|
|
"\t* WGL_ARB_create_context: %s\n"
|
|
"\t* WGL_EXT_swap_control: %s\n"
|
|
"\t* WGL_OML_sync_control: %s\n",
|
|
display_win32->gl_version / 10,
|
|
display_win32->gl_version % 10,
|
|
glGetString (GL_VENDOR),
|
|
display_win32->hasWglARBCreateContext ? "yes" : "no",
|
|
display_win32->hasWglEXTSwapControl ? "yes" : "no",
|
|
display_win32->hasWglOMLSyncControl ? "yes" : "no"));
|
|
|
|
wglMakeCurrent (NULL, NULL);
|
|
_destroy_dummy_gl_context (dummy);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static HGLRC
|
|
_create_gl_context (HDC hdc,
|
|
GdkGLContext *share,
|
|
int flags,
|
|
int major,
|
|
int minor)
|
|
{
|
|
/* we still need a legacy WGL context first for all cases */
|
|
HGLRC hglrc_base;
|
|
/* This is the actual WGL context that we want */
|
|
HGLRC hglrc;
|
|
GdkWin32GLContext *context_win32;
|
|
|
|
gint attribs[] = {
|
|
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
|
|
WGL_CONTEXT_MAJOR_VERSION_ARB, major,
|
|
WGL_CONTEXT_MINOR_VERSION_ARB, minor,
|
|
WGL_CONTEXT_FLAGS_ARB, flags,
|
|
0
|
|
};
|
|
|
|
hglrc_base = wglCreateContext (hdc);
|
|
|
|
if (!wglMakeCurrent (hdc, hglrc_base))
|
|
return NULL;
|
|
|
|
if (share != NULL)
|
|
context_win32 = GDK_WIN32_GL_CONTEXT (share);
|
|
|
|
hglrc = wglCreateContextAttribsARB (hdc,
|
|
share != NULL ? context_win32->hglrc : NULL,
|
|
attribs);
|
|
|
|
wglMakeCurrent (NULL, NULL);
|
|
wglDeleteContext (hglrc_base);
|
|
|
|
return hglrc;
|
|
}
|
|
|
|
static gboolean
|
|
_set_pixformat_for_hdc (HDC hdc,
|
|
gint *best_idx,
|
|
const gboolean need_alpha_bits)
|
|
{
|
|
PIXELFORMATDESCRIPTOR pfd;
|
|
gboolean set_pixel_format_result = FALSE;
|
|
|
|
/* one is only allowed to call SetPixelFormat(), and so ChoosePixelFormat()
|
|
* one single time per window HDC
|
|
*/
|
|
*best_idx = _get_wgl_pfd (hdc, need_alpha_bits, &pfd);
|
|
if (*best_idx != 0)
|
|
set_pixel_format_result = SetPixelFormat (hdc, *best_idx, &pfd);
|
|
|
|
/* ChoosePixelFormat() or SetPixelFormat() failed, bail out */
|
|
if (*best_idx == 0 || !set_pixel_format_result)
|
|
return FALSE;
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
_gdk_win32_gl_context_realize (GdkGLContext *context,
|
|
GError **error)
|
|
{
|
|
GdkGLContext *share = gdk_gl_context_get_shared_context (context);
|
|
GdkWin32GLContext *context_win32 = GDK_WIN32_GL_CONTEXT (context);
|
|
|
|
/* These are the real WGL context items that we will want to use later */
|
|
HGLRC hglrc;
|
|
gint pixel_format;
|
|
gboolean debug_bit, compat_bit;
|
|
|
|
if (!_set_pixformat_for_hdc (context_win32->gl_hdc,
|
|
&pixel_format,
|
|
context_win32->need_alpha_bits))
|
|
{
|
|
g_set_error_literal (error, GDK_GL_ERROR,
|
|
GDK_GL_ERROR_UNSUPPORTED_FORMAT,
|
|
_("No available configurations for the given pixel format"));
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/* request flags and specific versions for core (3.2+) WGL context */
|
|
gint flags = 0;
|
|
gint glver_major = 0;
|
|
gint glver_minor = 0;
|
|
|
|
gdk_gl_context_get_required_version (context, &glver_major, &glver_minor);
|
|
debug_bit = gdk_gl_context_get_debug_enabled (context);
|
|
compat_bit = gdk_gl_context_get_forward_compatible (context);
|
|
|
|
if (debug_bit)
|
|
flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
|
|
if (compat_bit)
|
|
flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
|
|
|
|
GDK_NOTE (OPENGL,
|
|
g_print ("Creating core WGL context (version:%d.%d, debug:%s, forward:%s)\n",
|
|
major, minor,
|
|
debug_bit ? "yes" : "no",
|
|
compat_bit ? "yes" : "no"));
|
|
|
|
hglrc = _create_gl_context (context_win32->gl_hdc,
|
|
share,
|
|
flags,
|
|
glver_major,
|
|
glver_minor);
|
|
if (hglrc == NULL)
|
|
{
|
|
g_set_error_literal (error, GDK_GL_ERROR,
|
|
GDK_GL_ERROR_NOT_AVAILABLE,
|
|
_("Unable to create a GL context"));
|
|
return FALSE;
|
|
}
|
|
|
|
GDK_NOTE (OPENGL,
|
|
g_print ("Created WGL context[%p], pixel_format=%d\n",
|
|
hglrc,
|
|
pixel_format));
|
|
|
|
context_win32->hglrc = hglrc;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
GdkGLContext *
|
|
_gdk_win32_window_create_gl_context (GdkWindow *window,
|
|
gboolean attached,
|
|
GdkGLContext *share,
|
|
GError **error)
|
|
{
|
|
GdkDisplay *display = gdk_window_get_display (window);
|
|
GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (gdk_window_get_display (window));
|
|
GdkWin32GLContext *context = NULL;
|
|
GdkVisual *visual = gdk_window_get_visual (window);
|
|
|
|
/* XXX: gdk_screen_get_rgba_visual() is not implemented on Windows, so
|
|
* need_alpha_bits will always be FALSE for now.
|
|
*
|
|
* Please see bug https://bugzilla.gnome.org/show_bug.cgi?id=727316
|
|
*/
|
|
gboolean need_alpha_bits = (visual == gdk_screen_get_rgba_visual (gdk_display_get_default_screen (display)));
|
|
|
|
/* Acquire and store up the Windows-specific HWND and HDC */
|
|
HWND hwnd;
|
|
HDC hdc;
|
|
|
|
if (!_gdk_win32_display_init_gl (display, need_alpha_bits))
|
|
{
|
|
g_set_error_literal (error, GDK_GL_ERROR,
|
|
GDK_GL_ERROR_NOT_AVAILABLE,
|
|
_("No GL implementation is available"));
|
|
return NULL;
|
|
}
|
|
|
|
/* We first check whether we have WGL_ARB_create_context... */
|
|
if (!display_win32->hasWglARBCreateContext)
|
|
{
|
|
g_set_error_literal (error, GDK_GL_ERROR,
|
|
GDK_GL_ERROR_UNSUPPORTED_PROFILE,
|
|
_("The WGL_ARB_create_context extension "
|
|
"needed to create core profiles is not "
|
|
"available"));
|
|
return NULL;
|
|
}
|
|
|
|
hwnd = GDK_WINDOW_HWND (window);
|
|
hdc = GetDC (hwnd);
|
|
|
|
display_win32->gl_hdc = hdc;
|
|
display_win32->gl_hwnd = hwnd;
|
|
|
|
context = g_object_new (GDK_TYPE_WIN32_GL_CONTEXT,
|
|
"display", display,
|
|
"window", window,
|
|
"shared-context", share,
|
|
NULL);
|
|
|
|
context->need_alpha_bits = need_alpha_bits;
|
|
context->gl_hdc = hdc;
|
|
context->is_attached = attached;
|
|
|
|
return GDK_GL_CONTEXT (context);
|
|
}
|
|
|
|
gboolean
|
|
_gdk_win32_display_make_gl_context_current (GdkDisplay *display,
|
|
GdkGLContext *context)
|
|
{
|
|
GdkWin32GLContext *context_win32;
|
|
GdkWin32Display *display_win32 = GDK_WIN32_DISPLAY (display);
|
|
GdkWindow *window;
|
|
GdkScreen *screen;
|
|
|
|
gboolean do_frame_sync = FALSE;
|
|
|
|
if (context == NULL)
|
|
{
|
|
wglMakeCurrent(NULL, NULL);
|
|
return TRUE;
|
|
}
|
|
|
|
context_win32 = GDK_WIN32_GL_CONTEXT (context);
|
|
|
|
if (!wglMakeCurrent (display_win32->gl_hdc, context_win32->hglrc))
|
|
{
|
|
GDK_NOTE (OPENGL,
|
|
g_print ("Making WGL context current failed\n"));
|
|
return FALSE;
|
|
}
|
|
|
|
context_win32->gl_hdc = display_win32->gl_hdc;
|
|
|
|
if (context_win32->is_attached && display_win32->hasWglEXTSwapControl)
|
|
{
|
|
window = gdk_gl_context_get_window (context);
|
|
|
|
/* If there is compositing there is no particular need to delay
|
|
* the swap when drawing on the offscreen, rendering to the screen
|
|
* happens later anyway, and its up to the compositor to sync that
|
|
* to the vblank. */
|
|
screen = gdk_window_get_screen (window);
|
|
|
|
/* XXX: gdk_screen_is_composited () is always FALSE on Windows at the moment */
|
|
do_frame_sync = ! gdk_screen_is_composited (screen);
|
|
|
|
if (do_frame_sync != context_win32->do_frame_sync)
|
|
{
|
|
context_win32->do_frame_sync = do_frame_sync;
|
|
|
|
if (do_frame_sync)
|
|
wglSwapIntervalEXT (1);
|
|
else
|
|
wglSwapIntervalEXT (0);
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/**
|
|
* gdk_win32_display_get_wgl_version:
|
|
* @display: a #GdkDisplay
|
|
* @major: (out): return location for the WGL major version
|
|
* @minor: (out): return location for the WGL minor version
|
|
*
|
|
* Retrieves the version of the WGL implementation.
|
|
*
|
|
* Returns: %TRUE if WGL is available
|
|
*
|
|
* Since: 3.16
|
|
*/
|
|
gboolean
|
|
gdk_win32_display_get_wgl_version (GdkDisplay *display,
|
|
gint *major,
|
|
gint *minor)
|
|
{
|
|
g_return_val_if_fail (GDK_IS_DISPLAY (display), FALSE);
|
|
|
|
if (!GDK_IS_WIN32_DISPLAY (display))
|
|
return FALSE;
|
|
|
|
if (!_gdk_win32_display_init_gl (display, FALSE))
|
|
return FALSE;
|
|
|
|
if (major != NULL)
|
|
*major = GDK_WIN32_DISPLAY (display)->gl_version / 10;
|
|
if (minor != NULL)
|
|
*minor = GDK_WIN32_DISPLAY (display)->gl_version % 10;
|
|
|
|
return TRUE;
|
|
}
|