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//Copyright Paul Reiche, Fred Ford. 1992-2002
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "gfxintrn.h"
#include "libs/graphics/gfx_common.h"
#include "libs/graphics/drawcmd.h"
#include "libs/timelib.h"
#include "libs/misc.h"
// for TFB_DEBUG_HALT
int ScreenWidth;
int ScreenHeight;
int ScreenWidthActual;
int ScreenHeightActual;
int ScreenColorDepth;
int GraphicsDriver;
int TFB_DEBUG_HALT = 0;
volatile int TransitionAmount = 255;
RECT TransitionClipRect;
static int gscale = GSCALE_IDENTITY;
static int gscale_mode = TFB_SCALE_NEAREST;
void
DrawFromExtraScreen (RECT *r)
{
TFB_DrawScreen_Copy(r, TFB_SCREEN_EXTRA, TFB_SCREEN_MAIN);
}
void
LoadIntoExtraScreen (RECT *r)
{
TFB_DrawScreen_Copy(r, TFB_SCREEN_MAIN, TFB_SCREEN_EXTRA);
}
int
SetGraphicScale (int scale)
{
int old_scale = gscale;
gscale = (scale ? scale : GSCALE_IDENTITY);
return old_scale;
}
int
GetGraphicScale (void)
{
return gscale;
}
int
SetGraphicScaleMode (int mode)
{
int old_mode = gscale_mode;
assert (mode >= TFB_SCALE_NEAREST && mode <= TFB_SCALE_TRILINEAR);
gscale_mode = mode;
return old_mode;
}
int
GetGraphicScaleMode (void)
{
return gscale_mode;
}
/* Batching and Unbatching functions. A "Batch" is a collection of
DrawCommands that will never be flipped to the screen half-rendered.
BatchGraphics and UnbatchGraphics function vaguely like a non-blocking
recursive lock to do this respect. */
void
BatchGraphics (void)
{
TFB_BatchGraphics ();
}
void
UnbatchGraphics (void)
{
TFB_UnbatchGraphics ();
}
/* Sleeps this thread until all Draw Commands queued by that thread have
been processed. */
void
FlushGraphics (void)
{
TFB_DrawScreen_WaitForSignal ();
}
static void
ExpandRect (RECT *rect, int expansion)
{
if (rect->corner.x - expansion >= 0)
{
rect->extent.width += expansion;
rect->corner.x -= expansion;
}
else
{
rect->extent.width += rect->corner.x;
rect->corner.x = 0;
}
if (rect->corner.y - expansion >= 0)
{
rect->extent.height += expansion;
rect->corner.y -= expansion;
}
else
{
rect->extent.height += rect->corner.y;
rect->corner.y = 0;
}
if (rect->corner.x + rect->extent.width + expansion <= ScreenWidth)
rect->extent.width += expansion;
else
rect->extent.width = ScreenWidth - rect->corner.x;
if (rect->corner.y + rect->extent.height + expansion <= ScreenHeight)
rect->extent.height += expansion;
else
rect->extent.height = ScreenHeight - rect->corner.y;
}
void
SetTransitionSource (const RECT *pRect)
{
RECT ActualRect;
if (pRect)
{ /* expand the rect to accomodate scalers in OpenGL mode */
ActualRect = *pRect;
pRect = &ActualRect;
ExpandRect (&ActualRect, 2);
}
TFB_DrawScreen_Copy (pRect, TFB_SCREEN_MAIN, TFB_SCREEN_TRANSITION);
}
// ScreenTransition() is synchronous (does not return until transition done)
void
ScreenTransition (int TransType, const RECT *pRect)
{
const TimePeriod DURATION = ONE_SECOND * 31 / 60;
TimeCount startTime;
(void) TransType; /* dodge compiler warning */
if (pRect)
{
TransitionClipRect = *pRect;
}
else
{
TransitionClipRect.corner.x = 0;
TransitionClipRect.corner.y = 0;
TransitionClipRect.extent.width = ScreenWidth;
TransitionClipRect.extent.height = ScreenHeight;
}
TFB_UploadTransitionScreen ();
TransitionAmount = 0;
FlushGraphics ();
startTime = GetTimeCounter ();
while (TransitionAmount < 255)
{
TimePeriod deltaT;
int newAmount;
SleepThread (ONE_SECOND / 100);
deltaT = GetTimeCounter () - startTime;
newAmount = deltaT * 255 / DURATION;
if (newAmount > 255)
newAmount = 255;
TransitionAmount = newAmount;
}
}
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