cpp/openttd-patchpack/source Changeset - r22568:df7ef8916103

Changeset - r22568:df7ef8916103

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frosch - 7 years ago 2017-03-11 13:05:54
frosch@openttd.org

(svn r27775) -Fix [FS#6510]: Insufficient thread synchronisation when switching blitters. (JGR)

6 files changed with 47 insertions and 5 deletions:

src/gfxinit.cpp

src/video/sdl_v.cpp

src/video/sdl_v.h

src/video/video_driver.hpp

src/video/win32_v.cpp

src/video/win32_v.h

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src/gfxinit.cpp

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@@ @@ -290,6 +290,8 @@ static bool SwitchNewGRFBlitter() @@
 	const bool animation_wanted = HasBit(_display_opt, DO_FULL_ANIMATION);
 	const char *cur_blitter = BlitterFactory::GetCurrentBlitter()->GetName();
 	VideoDriver::GetInstance()->AcquireBlitterLock();
 	for (uint i = 0; i < lengthof(replacement_blitters); i++) {
 		if (animation_wanted && (replacement_blitters[i].animation == 0)) continue;
 		if (!animation_wanted && (replacement_blitters[i].animation == 1)) continue;
@@ @@ -298,7 +300,10 @@ static bool SwitchNewGRFBlitter() @@
 		if (!IsInsideMM(depth_wanted_by_grf, replacement_blitters[i].min_grf_depth, replacement_blitters[i].max_grf_depth + 1)) continue;
 		const char *repl_blitter = replacement_blitters[i].name;
 		if (strcmp(repl_blitter, cur_blitter) == 0) return false;
 		if (strcmp(repl_blitter, cur_blitter) == 0) {
 			VideoDriver::GetInstance()->ReleaseBlitterLock();
 			return false;
+		}
 		if (BlitterFactory::GetBlitterFactory(repl_blitter) == NULL) continue;
 		DEBUG(misc, 1, "Switching blitter from '%s' to '%s'... ", cur_blitter, repl_blitter);
@@ @@ -313,6 +318,8 @@ static bool SwitchNewGRFBlitter() @@
 		if (BlitterFactory::SelectBlitter(cur_blitter) == NULL || !VideoDriver::GetInstance()->AfterBlitterChange()) usererror("Failed to reinitialize video driver. Specify a fixed blitter in the config");
+	}
 	VideoDriver::GetInstance()->ReleaseBlitterLock();
 	return true;
+}

src/video/sdl_v.cpp

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@@ @@ -818,10 +818,17 @@ bool VideoDriver_SDL::ToggleFullscreen(b @@
 bool VideoDriver_SDL::AfterBlitterChange()
+{
 	return CreateMainSurface(_screen.width, _screen.height);
+}
 void VideoDriver_SDL::AcquireBlitterLock()
+{
 	if (_draw_mutex != NULL) _draw_mutex->BeginCritical(true);
 	bool ret = CreateMainSurface(_screen.width, _screen.height);
+}
 void VideoDriver_SDL::ReleaseBlitterLock()
+{
 	if (_draw_mutex != NULL) _draw_mutex->EndCritical(true);
 	return ret;
+}
 #endif /* WITH_SDL */

src/video/sdl_v.h

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@@ @@ -31,6 +31,10 @@ public: @@
 	/* virtual */ bool AfterBlitterChange();
 	/* virtual */ void AcquireBlitterLock();
 	/* virtual */ void ReleaseBlitterLock();
 	/* virtual */ bool ClaimMousePointer();
 	/* virtual */ const char *GetName() const { return "sdl"; }

src/video/video_driver.hpp

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@@ @@ -49,6 +49,7 @@ public: @@
 	/**
 	 * Callback invoked after the blitter was changed.
 	 * This may only be called between AcquireBlitterLock and ReleaseBlitterLock.
 	 * @return True if no error.
 	 */
 	virtual bool AfterBlitterChange()
@@ @@ -56,6 +57,18 @@ public: @@
 		return true;
+	}
 	/**
 	 * Acquire any lock(s) required to be held when changing blitters.
 	 * These lock(s) may not be acquired recursively.
 	 */
 	virtual void AcquireBlitterLock() { }
 	/**
 	 * Release any lock(s) required to be held when changing blitters.
 	 * These lock(s) may not be acquired recursively.
 	 */
 	virtual void ReleaseBlitterLock() { }
 	virtual bool ClaimMousePointer()
+	{
 		return true;

src/video/win32_v.cpp

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@@ @@ -1334,10 +1334,17 @@ bool VideoDriver_Win32::ToggleFullscreen @@
 bool VideoDriver_Win32::AfterBlitterChange()
+{
 	return AllocateDibSection(_screen.width, _screen.height, true) && this->MakeWindow(_fullscreen);
+}
 void VideoDriver_Win32::AcquireBlitterLock()
+{
 	if (_draw_mutex != NULL) _draw_mutex->BeginCritical(true);
 	bool ret = AllocateDibSection(_screen.width, _screen.height, true) && this->MakeWindow(_fullscreen);
+}
 void VideoDriver_Win32::ReleaseBlitterLock()
+{
 	if (_draw_mutex != NULL) _draw_mutex->EndCritical(true);
 	return ret;
+}
 void VideoDriver_Win32::EditBoxLostFocus()

src/video/win32_v.h

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@@ @@ -31,6 +31,10 @@ public: @@
 	/* virtual */ bool AfterBlitterChange();
 	/* virtual */ void AcquireBlitterLock();
 	/* virtual */ void ReleaseBlitterLock();
 	/* virtual */ bool ClaimMousePointer();
 	/* virtual */ void EditBoxLostFocus();

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