#include "pipe/p_screen.h"
#include "util/u_memory.h"
#include "hud/hud_context.h"
+#include "os/os_time.h"
#include "state_tracker/st_api.h"
#include "stw_icd.h"
* If a stw_framebuffer is found, lock it and return the pointer.
* Else, return NULL.
*/
-static inline struct stw_framebuffer *
+static struct stw_framebuffer *
stw_framebuffer_from_hwnd_locked(HWND hwnd)
{
struct stw_framebuffer *fb;
for (fb = stw_dev->fb_head; fb != NULL; fb = fb->next)
if (fb->hWnd == hwnd) {
stw_framebuffer_lock(fb);
+ assert(fb->mutex.RecursionCount == 1);
return fb;
}
* Decrement the reference count on the given stw_framebuffer object.
* If the reference count hits zero, destroy the object.
*
- * Note: Both stw_dev::fb_mutex and stw_framebuffer::mutex must already
- * be locked.
+ * Note: Both stw_dev::fb_mutex and stw_framebuffer::mutex must already be
+ * locked. After this function completes, the fb's mutex will be unlocked.
*/
-static void
-stw_framebuffer_destroy_locked(struct stw_framebuffer *fb)
+void
+stw_framebuffer_release_locked(struct stw_framebuffer *fb)
{
struct stw_framebuffer **link;
+ assert(fb);
+ assert(stw_own_mutex(&fb->mutex));
+ assert(stw_own_mutex(&stw_dev->fb_mutex));
+
/* check the reference count */
fb->refcnt--;
if (fb->refcnt) {
- stw_framebuffer_release(fb);
+ stw_framebuffer_unlock(fb);
return;
}
stw_st_destroy_framebuffer_locked(fb->stfb);
- stw_framebuffer_release(fb);
+ stw_framebuffer_unlock(fb);
DeleteCriticalSection(&fb->mutex);
if (nCode < 0 || !stw_dev)
return CallNextHookEx(tls_data->hCallWndProcHook, nCode, wParam, lParam);
- if (pParams->message == WM_WINDOWPOSCHANGED) {
- /* We handle WM_WINDOWPOSCHANGED instead of WM_SIZE because according to
- * http://blogs.msdn.com/oldnewthing/archive/2008/01/15/7113860.aspx
- * WM_SIZE is generated from WM_WINDOWPOSCHANGED by DefWindowProc so it
- * can be masked out by the application.
- */
- LPWINDOWPOS lpWindowPos = (LPWINDOWPOS)pParams->lParam;
- if ((lpWindowPos->flags & SWP_SHOWWINDOW) ||
- !(lpWindowPos->flags & SWP_NOMOVE) ||
- !(lpWindowPos->flags & SWP_NOSIZE)) {
- fb = stw_framebuffer_from_hwnd( pParams->hwnd );
- if (fb) {
- /* Size in WINDOWPOS includes the window frame, so get the size
- * of the client area via GetClientRect.
- */
- stw_framebuffer_get_size(fb);
- stw_framebuffer_release(fb);
+ /* We check that the stw_dev object is initialized before we try to do
+ * anything with it. Otherwise, in multi-threaded programs there's a
+ * chance of executing this code before the stw_dev object is fully
+ * initialized.
+ */
+ if (stw_dev && stw_dev->initialized) {
+ if (pParams->message == WM_WINDOWPOSCHANGED) {
+ /* We handle WM_WINDOWPOSCHANGED instead of WM_SIZE because according
+ * to http://blogs.msdn.com/oldnewthing/archive/2008/01/15/7113860.aspx
+ * WM_SIZE is generated from WM_WINDOWPOSCHANGED by DefWindowProc so it
+ * can be masked out by the application.
+ */
+ LPWINDOWPOS lpWindowPos = (LPWINDOWPOS)pParams->lParam;
+ if ((lpWindowPos->flags & SWP_SHOWWINDOW) ||
+ !(lpWindowPos->flags & SWP_NOMOVE) ||
+ !(lpWindowPos->flags & SWP_NOSIZE)) {
+ fb = stw_framebuffer_from_hwnd( pParams->hwnd );
+ if (fb) {
+ /* Size in WINDOWPOS includes the window frame, so get the size
+ * of the client area via GetClientRect.
+ */
+ stw_framebuffer_get_size(fb);
+ stw_framebuffer_unlock(fb);
+ }
}
}
- }
- else if (pParams->message == WM_DESTROY) {
- stw_lock_framebuffers(stw_dev);
- fb = stw_framebuffer_from_hwnd_locked( pParams->hwnd );
- if (fb)
- stw_framebuffer_destroy_locked(fb);
- stw_unlock_framebuffers(stw_dev);
+ else if (pParams->message == WM_DESTROY) {
+ stw_lock_framebuffers(stw_dev);
+ fb = stw_framebuffer_from_hwnd_locked( pParams->hwnd );
+ if (fb)
+ stw_framebuffer_release_locked(fb);
+ stw_unlock_framebuffers(stw_dev);
+ }
}
return CallNextHookEx(tls_data->hCallWndProcHook, nCode, wParam, lParam);
}
-/**
- * Have ptr reference fb. The referenced framebuffer should be locked.
- */
-void
-stw_framebuffer_reference(struct stw_framebuffer **ptr,
- struct stw_framebuffer *fb)
-{
- struct stw_framebuffer *old_fb = *ptr;
-
- if (old_fb == fb)
- return;
-
- if (fb)
- fb->refcnt++;
- if (old_fb) {
- stw_lock_framebuffers(stw_dev);
-
- stw_framebuffer_lock(old_fb);
- stw_framebuffer_destroy_locked(old_fb);
-
- stw_unlock_framebuffers(stw_dev);
- }
-
- *ptr = fb;
-}
-
-
/**
* Update the framebuffer's size if necessary.
*/
next = fb->next;
stw_framebuffer_lock(fb);
- stw_framebuffer_destroy_locked(fb);
+ stw_framebuffer_release_locked(fb);
fb = next;
}
* Given an hdc, return the corresponding stw_framebuffer.
* The returned stw_framebuffer will have its mutex locked.
*/
-static inline struct stw_framebuffer *
+static struct stw_framebuffer *
stw_framebuffer_from_hdc_locked(HDC hdc)
{
HWND hwnd;
*/
boolean bPbuffer = fb->bPbuffer;
- stw_framebuffer_release( fb );
+ stw_framebuffer_unlock( fb );
return bPbuffer;
}
return FALSE;
}
- stw_framebuffer_release( fb );
+ stw_framebuffer_unlock( fb );
/* Some applications mistakenly use the undocumented wglSetPixelFormat
* function instead of SetPixelFormat, so we call SetPixelFormat here to
fb = stw_framebuffer_from_hdc(hdc);
if (fb) {
iPixelFormat = fb->iPixelFormat;
- stw_framebuffer_release(fb);
+ stw_framebuffer_unlock(fb);
}
return iPixelFormat;
stw_framebuffer_update(fb);
stw_notify_current_locked(fb);
- stw_framebuffer_release(fb);
+ stw_framebuffer_unlock(fb);
return TRUE;
}
data.pPrivateData = (void *)res;
stw_notify_current_locked(fb);
- stw_framebuffer_release(fb);
+ stw_framebuffer_unlock(fb);
return stw_dev->callbacks.wglCbPresentBuffers(hdc, &data);
}
stw_framebuffer_update(fb);
stw_notify_current_locked(fb);
- stw_framebuffer_release(fb);
+ stw_framebuffer_unlock(fb);
return TRUE;
}
}
+/**
+ * This is called just before issuing the buffer swap/present.
+ * We query the current time and determine if we should sleep before
+ * issuing the swap/present.
+ * This is a bit of a hack and is certainly not very accurate but it
+ * basically works.
+ * This is for the WGL_ARB_swap_interval extension.
+ */
+static void
+wait_swap_interval(struct stw_framebuffer *fb)
+{
+ /* Note: all time variables here are in units of microseconds */
+ int64_t cur_time = os_time_get_nano() / 1000;
+
+ if (fb->prev_swap_time != 0) {
+ /* Compute time since previous swap */
+ int64_t delta = cur_time - fb->prev_swap_time;
+ int64_t min_swap_period =
+ 1.0e6 / stw_dev->refresh_rate * stw_dev->swap_interval;
+
+ /* if time since last swap is less than wait period, wait */
+ if (delta < min_swap_period) {
+ float fudge = 1.75f; /* emperical fudge factor */
+ int64_t wait = (min_swap_period - delta) * fudge;
+ os_time_sleep(wait);
+ }
+ }
+
+ fb->prev_swap_time = cur_time;
+}
+
+
BOOL APIENTRY
DrvSwapBuffers(HDC hdc)
{
return FALSE;
if (!(fb->pfi->pfd.dwFlags & PFD_DOUBLEBUFFER)) {
- stw_framebuffer_release(fb);
+ stw_framebuffer_unlock(fb);
return TRUE;
}
}
}
+ if (stw_dev->swap_interval != 0) {
+ wait_swap_interval(fb);
+ }
+
return stw_st_swap_framebuffer_locked(hdc, fb->stfb);
}
projects / mesa.git / blobdiff