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SDL_fbriva.c
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
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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
Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include "SDL_video.h"
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#include "../SDL_blit.h"
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#include "SDL_fbriva.h"
#include "riva_mmio.h"
#include "riva_regs.h"
static int FifoEmptyCount = 0;
static int FifoFreeCount = 0;
/* Wait for vertical retrace */
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static void
WaitVBL(_THIS)
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{
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volatile Uint8 *port = (Uint8 *) (mapped_io + PCIO_OFFSET + 0x3DA);
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while ((*port & 0x08));
while (!(*port & 0x08));
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}
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static void
NV3WaitIdle(_THIS)
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{
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RivaRop *Rop = (RivaRop *) (mapped_io + ROP_OFFSET);
while ((Rop->FifoFree < FifoEmptyCount) ||
(*(mapped_io + PGRAPH_OFFSET + 0x000006B0) & 0x01));
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}
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static void
NV4WaitIdle(_THIS)
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{
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RivaRop *Rop = (RivaRop *) (mapped_io + ROP_OFFSET);
while ((Rop->FifoFree < FifoEmptyCount) ||
(*(mapped_io + PGRAPH_OFFSET + 0x00000700) & 0x01));
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}
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#if 0 /* Not yet implemented? */
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/* Sets video mem colorkey and accelerated blit function */
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static int
SetHWColorKey(_THIS, SDL_Surface * surface, Uint32 key)
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{
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return (0);
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}
/* Sets per surface hardware alpha value */
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static int
SetHWAlpha(_THIS, SDL_Surface * surface, Uint8 value)
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{
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return (0);
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}
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#endif /* Not yet implemented */
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static int
FillHWRect(_THIS, SDL_Surface * dst, SDL_Rect * rect, Uint32 color)
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{
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int dstX, dstY;
int dstW, dstH;
RivaBitmap *Bitmap = (RivaBitmap *) (mapped_io + BITMAP_OFFSET);
/* Don't blit to the display surface when switched away */
if (switched_away) {
return -2; /* no hardware access */
}
if (dst == this->screen) {
SDL_mutexP(hw_lock);
}
/* Set up the X/Y base coordinates */
dstW = rect->w;
dstH = rect->h;
FB_dst_to_xy(this, dst, &dstX, &dstY);
/* Adjust for the current rectangle */
dstX += rect->x;
dstY += rect->y;
RIVA_FIFO_FREE(Bitmap, 1);
Bitmap->Color1A = color;
RIVA_FIFO_FREE(Bitmap, 2);
Bitmap->UnclippedRectangle[0].TopLeft = (dstX << 16) | dstY;
Bitmap->UnclippedRectangle[0].WidthHeight = (dstW << 16) | dstH;
FB_AddBusySurface(dst);
if (dst == this->screen) {
SDL_mutexV(hw_lock);
}
return (0);
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}
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static int
HWAccelBlit(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect)
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{
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SDL_VideoDevice *this = current_video;
int srcX, srcY;
int dstX, dstY;
int dstW, dstH;
RivaScreenBlt *Blt = (RivaScreenBlt *) (mapped_io + BLT_OFFSET);
/* FIXME: For now, only blit to display surface */
if (dst->pitch != SDL_VideoSurface->pitch) {
return (src->map->sw_blit(src, srcrect, dst, dstrect));
}
/* Don't blit to the display surface when switched away */
if (switched_away) {
return -2; /* no hardware access */
}
if (dst == this->screen) {
SDL_mutexP(hw_lock);
}
/* Calculate source and destination base coordinates (in pixels) */
dstW = dstrect->w;
dstH = dstrect->h;
FB_dst_to_xy(this, src, &srcX, &srcY);
FB_dst_to_xy(this, dst, &dstX, &dstY);
/* Adjust for the current blit rectangles */
srcX += srcrect->x;
srcY += srcrect->y;
dstX += dstrect->x;
dstY += dstrect->y;
RIVA_FIFO_FREE(Blt, 3);
Blt->TopLeftSrc = (srcY << 16) | srcX;
Blt->TopLeftDst = (dstY << 16) | dstX;
Blt->WidthHeight = (dstH << 16) | dstW;
FB_AddBusySurface(src);
FB_AddBusySurface(dst);
if (dst == this->screen) {
SDL_mutexV(hw_lock);
}
return (0);
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}
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static int
CheckHWBlit(_THIS, SDL_Surface * src, SDL_Surface * dst)
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{
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int accelerated;
/* Set initial acceleration on */
src->flags |= SDL_HWACCEL;
/* Set the surface attributes */
if ((src->flags & SDL_SRCALPHA) == SDL_SRCALPHA) {
if (!this->info.blit_hw_A) {
src->flags &= ~SDL_HWACCEL;
}
}
if ((src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY) {
if (!this->info.blit_hw_CC) {
src->flags &= ~SDL_HWACCEL;
}
}
/* Check to see if final surface blit is accelerated */
accelerated = !!(src->flags & SDL_HWACCEL);
if (accelerated) {
src->map->hw_blit = HWAccelBlit;
}
return (accelerated);
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}
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void
FB_RivaAccel(_THIS, __u32 card)
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{
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RivaRop *Rop = (RivaRop *) (mapped_io + ROP_OFFSET);
/* We have hardware accelerated surface functions */
this->CheckHWBlit = CheckHWBlit;
wait_vbl = WaitVBL;
switch (card) {
case FB_ACCEL_NV3:
wait_idle = NV3WaitIdle;
break;
case FB_ACCEL_NV4:
wait_idle = NV4WaitIdle;
break;
default:
/* Hmm... FIXME */
break;
}
FifoEmptyCount = Rop->FifoFree;
/* The Riva has an accelerated color fill */
this->info.blit_fill = 1;
this->FillHWRect = FillHWRect;
/* The Riva has accelerated normal and colorkey blits. */
this->info.blit_hw = 1;
#if 0 /* Not yet implemented? */
this->info.blit_hw_CC = 1;
this->SetHWColorKey = SetHWColorKey;
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#endif
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#if 0 /* Not yet implemented? */
/* The Riva has an accelerated alpha blit */
this->info.blit_hw_A = 1;
this->SetHWAlpha = SetHWAlpha;
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#endif
}
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/* vi: set ts=4 sw=4 expandtab: */