int
TFB_DrawCommandQueue_Pop (TFB_DrawCommand *target)
{
LockRecursiveMutex (DCQ_Mutex);
if (DrawCommandQueue.Size == 0)
{
Unlock_DCQ ();
return (0);
}
if (DrawCommandQueue.Front == DrawCommandQueue.Back &&
DrawCommandQueue.Size != DCQ_MAX)
{
log_add (log_Debug, "Augh! Assertion failure in DCQ! "
"Front == Back, Size != DCQ_MAX");
DrawCommandQueue.Size = 0;
Unlock_DCQ ();
return (0);
}
*target = DCQ[DrawCommandQueue.Front];
DrawCommandQueue.Front = (DrawCommandQueue.Front + 1) % DCQ_MAX;
DrawCommandQueue.Size--;
DrawCommandQueue.FullSize--;
UnlockRecursiveMutex (DCQ_Mutex);
return 1;
}
void
TFB_DrawCommandQueue_Push (TFB_DrawCommand* Command)
{
Lock_DCQ (1);
DCQ[DrawCommandQueue.InsertionPoint] = *Command;
DrawCommandQueue.InsertionPoint = (DrawCommandQueue.InsertionPoint + 1)
% DCQ_MAX;
DrawCommandQueue.FullSize++;
Synchronize_DCQ ();
Unlock_DCQ ();
}
void
TFB_DrawScreen_WaitForSignal (void)
{
TFB_DrawCommand DrawCommand;
Semaphore s;
s = GetMyThreadLocal ()->flushSem;
DrawCommand.Type = TFB_DRAWCOMMANDTYPE_SENDSIGNAL;
DrawCommand.data.sendsignal.sem = s;
Lock_DCQ (1);
TFB_BatchReset ();
TFB_EnqueueDrawCommand (&DrawCommand);
Unlock_DCQ();
SetSemaphore (s);
}
// Only call from main() thread!!
void
TFB_FlushGraphics (void)
{
int commands_handled;
BOOLEAN livelock_deterrence;
// This is technically a locking violation on DrawCommandQueue.Size,
// but it is likely to not be very destructive.
if (DrawCommandQueue.Size == 0)
{
static int last_fade = 255;
static int last_transition = 255;
int current_fade = GetFadeAmount ();
int current_transition = TransitionAmount;
if ((current_fade != 255 && current_fade != last_fade) ||
(current_transition != 255 &&
current_transition != last_transition) ||
(current_fade == 255 && last_fade != 255) ||
(current_transition == 255 && last_transition != 255))
{
TFB_SwapBuffers (TFB_REDRAW_FADING);
// if fading, redraw every frame
}
else
{
TaskSwitch ();
}
last_fade = current_fade;
last_transition = current_transition;
BroadcastCondVar (RenderingCond);
return;
}
if (GfxFlags & TFB_GFXFLAGS_SHOWFPS)
computeFPS ();
commands_handled = 0;
livelock_deterrence = FALSE;
if (DrawCommandQueue.FullSize > DCQ_FORCE_BREAK_SIZE)
{
TFB_BatchReset ();
}
if (DrawCommandQueue.Size > DCQ_FORCE_SLOWDOWN_SIZE)
{
Lock_DCQ (-1);
livelock_deterrence = TRUE;
}
TFB_BBox_Reset ();
for (;;)
{
TFB_DrawCommand DC;
if (!TFB_DrawCommandQueue_Pop (&DC))
{
// the Queue is now empty.
break;
}
++commands_handled;
if (!livelock_deterrence && commands_handled + DrawCommandQueue.Size
> DCQ_LIVELOCK_MAX)
{
// log_add (log_Debug, "Initiating livelock deterrence!");
livelock_deterrence = TRUE;
Lock_DCQ (-1);
}
switch (DC.Type)
{
case TFB_DRAWCOMMANDTYPE_SETMIPMAP:
{
TFB_DrawCommand_SetMipmap *cmd = &DC.data.setmipmap;
TFB_DrawImage_SetMipmap (cmd->image, cmd->mipmap,
cmd->hotx, cmd->hoty);
break;
}
case TFB_DRAWCOMMANDTYPE_IMAGE:
{
TFB_DrawCommand_Image *cmd = &DC.data.image;
TFB_Image *DC_image = cmd->image;
const int x = cmd->x;
const int y = cmd->y;
TFB_DrawCanvas_Image (DC_image, x, y,
cmd->scale, cmd->scaleMode, cmd->colormap,
cmd->drawMode,
TFB_GetScreenCanvas (cmd->destBuffer));
if (cmd->destBuffer == TFB_SCREEN_MAIN)
{
LockMutex (DC_image->mutex);
if (cmd->scale)
TFB_BBox_RegisterCanvas (DC_image->ScaledImg,
x - DC_image->last_scale_hs.x,
y - DC_image->last_scale_hs.y);
else
TFB_BBox_RegisterCanvas (DC_image->NormalImg,
x - DC_image->NormalHs.x,
y - DC_image->NormalHs.y);
UnlockMutex (DC_image->mutex);
}
break;
}
case TFB_DRAWCOMMANDTYPE_FILLEDIMAGE:
{
TFB_DrawCommand_FilledImage *cmd = &DC.data.filledimage;
TFB_Image *DC_image = cmd->image;
const int x = cmd->x;
const int y = cmd->y;
TFB_DrawCanvas_FilledImage (DC_image, x, y,
cmd->scale, cmd->scaleMode, cmd->color,
cmd->drawMode,
TFB_GetScreenCanvas (cmd->destBuffer));
if (cmd->destBuffer == TFB_SCREEN_MAIN)
{
LockMutex (DC_image->mutex);
if (cmd->scale)
TFB_BBox_RegisterCanvas (DC_image->ScaledImg,
x - DC_image->last_scale_hs.x,
y - DC_image->last_scale_hs.y);
else
TFB_BBox_RegisterCanvas (DC_image->NormalImg,
x - DC_image->NormalHs.x,
y - DC_image->NormalHs.y);
UnlockMutex (DC_image->mutex);
}
break;
}
case TFB_DRAWCOMMANDTYPE_FONTCHAR:
{
TFB_DrawCommand_FontChar *cmd = &DC.data.fontchar;
TFB_Char *DC_char = cmd->fontchar;
const int x = cmd->x;
const int y = cmd->y;
TFB_DrawCanvas_FontChar (DC_char, cmd->backing, x, y,
cmd->drawMode, TFB_GetScreenCanvas (cmd->destBuffer));
if (cmd->destBuffer == TFB_SCREEN_MAIN)
{
RECT r;
r.corner.x = x - DC_char->HotSpot.x;
r.corner.y = y - DC_char->HotSpot.y;
r.extent.width = DC_char->extent.width;
r.extent.height = DC_char->extent.height;
TFB_BBox_RegisterRect (&r);
}
break;
}
case TFB_DRAWCOMMANDTYPE_LINE:
{
TFB_DrawCommand_Line *cmd = &DC.data.line;
if (cmd->destBuffer == TFB_SCREEN_MAIN)
{
TFB_BBox_RegisterPoint (cmd->x1, cmd->y1);
TFB_BBox_RegisterPoint (cmd->x2, cmd->y2);
}
TFB_DrawCanvas_Line (cmd->x1, cmd->y1, cmd->x2, cmd->y2,
cmd->color, cmd->drawMode,
TFB_GetScreenCanvas (cmd->destBuffer));
break;
}
case TFB_DRAWCOMMANDTYPE_RECTANGLE:
{
TFB_DrawCommand_Rect *cmd = &DC.data.rect;
if (cmd->destBuffer == TFB_SCREEN_MAIN)
TFB_BBox_RegisterRect (&cmd->rect);
TFB_DrawCanvas_Rect (&cmd->rect, cmd->color, cmd->drawMode,
TFB_GetScreenCanvas (cmd->destBuffer));
break;
}
case TFB_DRAWCOMMANDTYPE_SCISSORENABLE:
{
TFB_DrawCommand_Scissor *cmd = &DC.data.scissor;
TFB_DrawCanvas_SetClipRect (
TFB_GetScreenCanvas (TFB_SCREEN_MAIN), &cmd->rect);
TFB_BBox_SetClipRect (&DC.data.scissor.rect);
break;
}
case TFB_DRAWCOMMANDTYPE_SCISSORDISABLE:
TFB_DrawCanvas_SetClipRect (
TFB_GetScreenCanvas (TFB_SCREEN_MAIN), NULL);
TFB_BBox_SetClipRect (NULL);
break;
case TFB_DRAWCOMMANDTYPE_COPYTOIMAGE:
{
TFB_DrawCommand_CopyToImage *cmd = &DC.data.copytoimage;
TFB_Image *DC_image = cmd->image;
const POINT dstPt = {0, 0};
if (DC_image == 0)
{
log_add (log_Debug, "DCQ ERROR: COPYTOIMAGE passed null "
"image ptr");
break;
}
LockMutex (DC_image->mutex);
TFB_DrawCanvas_CopyRect (
TFB_GetScreenCanvas (cmd->srcBuffer), &cmd->rect,
DC_image->NormalImg, dstPt);
UnlockMutex (DC_image->mutex);
break;
}
case TFB_DRAWCOMMANDTYPE_COPY:
{
TFB_DrawCommand_Copy *cmd = &DC.data.copy;
const RECT r = cmd->rect;
if (cmd->destBuffer == TFB_SCREEN_MAIN)
TFB_BBox_RegisterRect (&cmd->rect);
TFB_DrawCanvas_CopyRect (
TFB_GetScreenCanvas (cmd->srcBuffer), &r,
TFB_GetScreenCanvas (cmd->destBuffer), r.corner);
break;
}
case TFB_DRAWCOMMANDTYPE_DELETEIMAGE:
{
TFB_Image *DC_image = DC.data.deleteimage.image;
TFB_DrawImage_Delete (DC_image);
break;
}
case TFB_DRAWCOMMANDTYPE_DELETEDATA:
{
void *data = DC.data.deletedata.data;
HFree (data);
break;
}
case TFB_DRAWCOMMANDTYPE_SENDSIGNAL:
ClearSemaphore (DC.data.sendsignal.sem);
break;
case TFB_DRAWCOMMANDTYPE_REINITVIDEO:
{
TFB_DrawCommand_ReinitVideo *cmd = &DC.data.reinitvideo;
int oldDriver = GraphicsDriver;
int oldFlags = GfxFlags;
int oldWidth = ScreenWidthActual;
int oldHeight = ScreenHeightActual;
// JMS_GFX: Added resolutionFactor
if (TFB_ReInitGraphics (cmd->driver, cmd->flags,
cmd->width, cmd->height, resolutionFactor))
{
log_add (log_Error, "Could not provide requested mode: "
"reverting to last known driver.");
// We don't know what exactly failed, so roll it all back
if (TFB_ReInitGraphics (oldDriver, oldFlags,
oldWidth, oldHeight, resolutionFactor))
{
log_add (log_Fatal,
"Couldn't reinit at that point either. "
"Your video has been somehow tied in knots.");
exit (EXIT_FAILURE);
}
}
TFB_SwapBuffers (TFB_REDRAW_YES);
break;
}
case TFB_DRAWCOMMANDTYPE_CALLBACK:
{
DC.data.callback.callback (DC.data.callback.arg);
break;
}
}
}
if (livelock_deterrence)
Unlock_DCQ ();
TFB_SwapBuffers (TFB_REDRAW_NO);
RenderedFrames++;
BroadcastCondVar (RenderingCond);
}