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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
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.
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.
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
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_video.h"
#include "../SDL_blit.h"
#include "SDL_fbmatrox.h"
#include "matrox_mmio.h"
/* Wait for vertical retrace - taken from the XFree86 Matrox driver */
static void WaitVBL(_THIS)
{
int count;
/* find start of retrace */
mga_waitidle();
while ( (mga_in8(0x1FDA) & 0x08) )
;
while ( !(mga_in8(0x1FDA) & 0x08) )
;
/* wait until we're past the start */
count = mga_in32(0x1E20) + 2;
while ( mga_in32(0x1E20) < count )
;
}
static void WaitIdle(_THIS)
{
mga_waitidle();
}
/* Sets video mem colorkey and accelerated blit function */
static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
{
return(0);
}
/* Sets per surface hardware alpha value */
#if 0
static int SetHWAlpha(_THIS, SDL_Surface *surface, Uint8 value)
{
return(0);
}
#endif
static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
{
int dstX, dstY;
Uint32 fxbndry;
Uint32 ydstlen;
Uint32 fillop;
/* 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);
}
switch (dst->format->BytesPerPixel) {
case 1:
color |= (color<<8);
case 2:
color |= (color<<16);
break;
}
/* Set up the X/Y base coordinates */
FB_dst_to_xy(this, dst, &dstX, &dstY);
/* Adjust for the current rectangle */
dstX += rect->x;
dstY += rect->y;
/* Set up the X boundaries */
fxbndry = (dstX | ((dstX+rect->w) << 16));
/* Set up the Y boundaries */
ydstlen = (rect->h | (dstY << 16));
/* Set up for color fill operation */
fillop = MGADWG_TRAP | MGADWG_SOLID |
MGADWG_ARZERO | MGADWG_SGNZERO | MGADWG_SHIFTZERO;
/* Execute the operations! */
mga_wait(5);
mga_out32(MGAREG_DWGCTL, fillop | MGADWG_REPLACE);
mga_out32(MGAREG_FCOL, color);
mga_out32(MGAREG_FXBNDRY, fxbndry);
mga_out32(MGAREG_YDSTLEN + MGAREG_EXEC, ydstlen);
FB_AddBusySurface(dst);
if ( dst == this->screen ) {
SDL_mutexV(hw_lock);
}
return(0);
}
static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
SDL_Surface *dst, SDL_Rect *dstrect)
{
SDL_VideoDevice *this = current_video;
int pitch, w, h;
int srcX, srcY;
int dstX, dstY;
Uint32 sign;
Uint32 start, stop;
int skip;
Uint32 blitop;
/* 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) */
w = dstrect->w;
h = 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;
pitch = dst->pitch/dst->format->BytesPerPixel;
/* Set up the blit direction (sign) flags */
sign = 0;
if ( srcX < dstX ) {
sign |= 1;
}
if ( srcY < dstY ) {
sign |= 4;
srcY += (h - 1);
dstY += (h - 1);
}
/* Set up the blit source row start, end, and skip (in pixels) */
stop = start = (srcY * pitch) + srcX;
if ( srcX < dstX ) {
start += (w - 1);
} else {
stop += (w - 1);
}
if ( srcY < dstY ) {
skip = -pitch;
} else {
skip = pitch;
}
/* Set up the blit operation */
if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
Uint32 colorkey;
blitop = MGADWG_BFCOL | MGADWG_BITBLT |
MGADWG_SHIFTZERO | MGADWG_RSTR | (0x0C << 16) |
MGADWG_TRANSC;
colorkey = src->format->colorkey;
switch (dst->format->BytesPerPixel) {
case 1:
colorkey |= (colorkey<<8);
case 2:
colorkey |= (colorkey<<16);
break;
}
mga_wait(2);
mga_out32(MGAREG_FCOL, colorkey);
mga_out32(MGAREG_BCOL, 0xFFFFFFFF);
} else {
blitop = MGADWG_BFCOL | MGADWG_BITBLT |
MGADWG_SHIFTZERO | MGADWG_RSTR | (0x0C << 16);
}
mga_wait(7);
mga_out32(MGAREG_SGN, sign);
mga_out32(MGAREG_AR3, start);
mga_out32(MGAREG_AR0, stop);
mga_out32(MGAREG_AR5, skip);
mga_out32(MGAREG_FXBNDRY, (dstX | ((dstX + w-1) << 16)));
mga_out32(MGAREG_YDSTLEN, (dstY << 16) | h);
mga_out32(MGAREG_DWGCTL + MGAREG_EXEC, blitop);
FB_AddBusySurface(src);
FB_AddBusySurface(dst);
if ( dst == this->screen ) {
SDL_mutexV(hw_lock);
}
return(0);
}
static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
{
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);
}
void FB_MatroxAccel(_THIS, __u32 card)
{
/* We have hardware accelerated surface functions */
this->CheckHWBlit = CheckHWBlit;
wait_vbl = WaitVBL;
wait_idle = WaitIdle;
/* The Matrox has an accelerated color fill */
this->info.blit_fill = 1;
this->FillHWRect = FillHWRect;
/* The Matrox has accelerated normal and colorkey blits. */
this->info.blit_hw = 1;
/* The Millenium I appears to do the colorkey test a word
at a time, and the transparency is intverted. (?)
*/
if ( card != FB_ACCEL_MATROX_MGA2064W ) {
this->info.blit_hw_CC = 1;
this->SetHWColorKey = SetHWColorKey;
}
#if 0 /* Not yet implemented? */
/* The Matrox G200/G400 has an accelerated alpha blit */
if ( (card == FB_ACCEL_MATROX_MGAG200)
|| (card == FB_ACCEL_MATROX_MGAG400)
) {
this->info.blit_hw_A = 1;
this->SetHWAlpha = SetHWAlpha;
}
#endif
}
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