rem: break;
add: if (si->ps.card_type != NV31) break;
context: status_t nv_configure_bes	(const overlay_buffer *ob, const overlay_window *ow, const overlay_view *ov, int offset){	/* yuy2 (4:2:2) colorspace calculations */	/* Note:	 * in BeOS R5.0.3 and DANO:	 * 'ow->offset_xxx' is always 0, so not used;	 * 'ow->width' and 'ow->height' are the output window size: does not change	 * if window is clipping;	 * 'ow->h_start' and 'ow->v_start' are the left-top position of the output	 * window. These values can be negative: this means the window is clipping	 * at the left or the top of the display, respectively. */	/* 'ov' is the view in the source bitmap, so which part of the bitmap is actually	 * displayed on screen. This is used for the 'hardware zoom' function. */ 	/* calculated BES register values */	uint32 	hcoordv, vcoordv, hiscalv, hsrcstv,	viscalv, a1orgv, v1srcstv;	/* misc used variables */	uint16 temp1, temp2;	/* interval representation, used for scaling calculations */	uint16 intrep, crtc_hstart, crtc_vstart, crtc_hend, crtc_vend;	/* inverse scaling factor, used for source positioning */	uint32 ifactor;	/* copy of overlay view which has checked valid values */	overlay_view my_ov;	/**************************************************************************************	 *** copy, check and limit if needed the user-specified view into the intput bitmap ***	 **************************************************************************************/	my_ov = *ov;	/* check for valid 'coordinates' */	if (my_ov.width == 0) my_ov.width++;	if (my_ov.height == 0) my_ov.height++;	if (my_ov.h_start > ((ob->width - si->overlay.myBufInfo[offset].slopspace) - 1))		my_ov.h_start = ((ob->width - si->overlay.myBufInfo[offset].slopspace) - 1);	if (((my_ov.h_start + my_ov.width) - 1) > ((ob->width - si->overlay.myBufInfo[offset].slopspace) - 1))		my_ov.width = ((((ob->width - si->overlay.myBufInfo[offset].slopspace) - 1) - my_ov.h_start) + 1);	if (my_ov.v_start > (ob->height - 1))		my_ov.v_start = (ob->height - 1);	if (((my_ov.v_start + my_ov.height) - 1) > (ob->height - 1))		my_ov.height = (((ob->height - 1) - my_ov.v_start) + 1);	LOG(6,("Overlay: inputbuffer view (zoom) left %d, top %d, width %d, height %d\n",		my_ov.h_start, my_ov.v_start, my_ov.width, my_ov.height));	/* the BES does not respect virtual_workspaces, but adheres to CRTC	 * constraints only */	crtc_hstart = si->dm.h_display_start;	/* make dualhead switch mode with TVout enabled work while we're at it.. */	if (si->switched_crtcs)	{		crtc_hstart += si->dm.timing.h_display;	}	/* horizontal end is the first position beyond the displayed range on the CRTC */	crtc_hend = crtc_hstart + si->dm.timing.h_display;	crtc_vstart = si->dm.v_display_start;	/* vertical end is the first position beyond the displayed range on the CRTC */	crtc_vend = crtc_vstart + si->dm.timing.v_display;	/****************************************	 *** setup all edges of output window ***	 ****************************************/	/* setup left and right edges of output window */	hcoordv = 0;	/* left edge coordinate of output window, must be inside desktop */	/* clipping on the left side */	if (ow->h_start < crtc_hstart)	{		temp1 = 0;	}	else	{		/* clipping on the right side */		if (ow->h_start >= (crtc_hend - 1))		{			/* width < 2 is not allowed */			temp1 = (crtc_hend - crtc_hstart - 2) & 0x7ff;		} 		else		/* no clipping here */		{			temp1 = (ow->h_start - crtc_hstart) & 0x7ff;		}	} 	hcoordv |= temp1 << 16;	/* right edge coordinate of output window, must be inside desktop */	/* width < 2 is not allowed */	if (ow->width < 2) 	{		temp2 = (temp1 + 1) & 0x7ff;	}	else 	{		/* clipping on the right side */		if ((ow->h_start + ow->width - 1) > (crtc_hend - 1))		{			temp2 = (crtc_hend - crtc_hstart - 1) & 0x7ff;		}		else		{			/* clipping on the left side */			if ((ow->h_start + ow->width - 1) < (crtc_hstart + 1))			{				/* width < 2 is not allowed */				temp2 = 1;			}			else			/* no clipping here */			{				temp2 = ((uint16)(ow->h_start + ow->width - crtc_hstart - 1)) & 0x7ff;			}		}	}	hcoordv |= temp2 << 0;	LOG(4,("Overlay: CRTC left-edge output %d, right-edge output %d\n",temp1, temp2));	/* setup top and bottom edges of output window */	vcoordv = 0;	/* top edge coordinate of output window, must be inside desktop */	/* clipping on the top side */	if (ow->v_start < crtc_vstart)	{		temp1 = 0;	}	else	{		/* clipping on the bottom side */		if (ow->v_start >= (crtc_vend - 1))		{			/* height < 2 is not allowed */			temp1 = (crtc_vend - crtc_vstart - 2) & 0x7ff;		} 		else		/* no clipping here */		{			temp1 = (ow->v_start - crtc_vstart) & 0x7ff;		}	} 	vcoordv |= temp1 << 16;	/* bottom edge coordinate of output window, must be inside desktop */	/* height < 2 is not allowed */	if (ow->height < 2) 	{		temp2 = (temp1 + 1) & 0x7ff;	}	else 	{		/* clipping on the bottom side */		if ((ow->v_start + ow->height - 1) > (crtc_vend - 1))		{			temp2 = (crtc_vend - crtc_vstart - 1) & 0x7ff;		}		else		{			/* clipping on the top side */			if ((ow->v_start + ow->height - 1) < (crtc_vstart + 1))			{				/* height < 2 is not allowed */				temp2 = 1;			}			else			/* no clipping here */			{				temp2 = ((uint16)(ow->v_start + ow->height - crtc_vstart - 1)) & 0x7ff;			}		}	}	vcoordv |= temp2 << 0;	LOG(4,("Overlay: CRTC top-edge output %d, bottom-edge output %d\n",temp1, temp2));	/*********************************************	 *** setup horizontal scaling and clipping ***	 *********************************************/	LOG(6,("Overlay: total input picture width = %d, height = %d\n",			(ob->width - si->overlay.myBufInfo[offset].slopspace), ob->height));	LOG(6,("Overlay: output picture width = %d, height = %d\n", ow->width, ow->height));	/* do horizontal scaling... */	/* determine interval representation value, taking zoom into account */	if (ow->flags & B_OVERLAY_HORIZONTAL_FILTERING)	{		/* horizontal filtering is ON */		if ((my_ov.width == ow->width) | (ow->width < 2))		{			/* no horizontal scaling used, OR destination width < 2 */			intrep = 0;		}		else		{			intrep = 1;		}	}	else	{		/* horizontal filtering is OFF */		if ((ow->width < my_ov.width) & (ow->width >= 2))		{			/* horizontal downscaling used AND destination width >= 2 */			intrep = 1;		}		else		{			intrep = 0;		}	}	LOG(4,("Overlay: horizontal interval representation value is %d\n",intrep));	/* calculate inverse horizontal scaling factor, taking zoom into account */	/* standard scaling formula: */	ifactor = (((uint32)(my_ov.width - intrep)) << 16) / (ow->width - intrep); 	/* correct factor to prevent most-right visible 'line' from distorting */	ifactor -= (1 << 2);	hiscalv = ifactor;	LOG(4,("Overlay: horizontal scaling factor is %f\n", (float)65536 / ifactor));	/* check scaling factor (and modify if needed) to be within scaling limits */	/* (assuming) all cards have a upscaling limit of 8.0 */	if (hiscalv < 0x00002000)	{		/* (non-inverse) factor too large, set factor to max. valid value */		hiscalv = 0x00002000;		LOG(4,("Overlay: horizontal scaling factor too large, clamping at %f\n", (float)65536 / hiscalv));	}	switch (si->ps.card_arch)	{	case NV04A:		/* Riva128-TNT2 series have a 'downscaling' limit of 1.000489		 * (16bit register with 0.11 format value) */		if (hiscalv > 0x0000ffff)		{			/* (non-inverse) factor too small, set factor to min. valid value */			hiscalv = 0x0000ffff;			LOG(4,("Overlay: horizontal scaling factor too small, clamping at %f\n", (float)2048 / (hiscalv >> 5)));		}		break;	case NV30A:		/* GeForceFX series have a downscaling limit of 0.5 */		if (hiscalv > (2 << 16))		{			/* (non-inverse) factor too small, set factor to min. valid value */			hiscalv = (2 << 16);			LOG(4,("Overlay: horizontal scaling factor too small, clamping at %f\n", (float)65536 / hiscalv));		}		break;	default:		/* the rest has a downscaling limit of 0.125 */		if (hiscalv > (8 << 16))		{			/* (non-inverse) factor too small, set factor to min. valid value */			hiscalv = (8 << 16);			LOG(4,("Overlay: horizontal scaling factor too small, clamping at %f\n", (float)65536 / hiscalv));		}		break;	}	/* AND below is required by hardware */	hiscalv &= 0x001ffffc;	/* do horizontal clipping... */	/* Setup horizontal source start: first (sub)pixel contributing to output picture */	/* Note:	 * The method is to calculate, based on 1:1 scaling, based on the output window.	 * After this is done, include the scaling factor so you get a value based on the input bitmap.	 * Then add the left starting position of the bitmap's view (zoom function) to get the final value needed.	 * Note: The input bitmaps slopspace is automatically excluded from the calculations this way! */	/* Note also:	 * Even if the scaling factor is clamping we instruct the BES to use the correct source start pos.! */	hsrcstv = 0;	/* check for destination horizontal clipping at left side */	if (ow->h_start < crtc_hstart)	{		/* check if entire destination picture is clipping left:		 * (2 pixels will be clamped onscreen at least) */		if ((ow->h_start + ow->width - 1) < (crtc_hstart + 1))		{			/* increase 'first contributing pixel' with 'fixed value': (total dest. width - 2) */			hsrcstv += (ow->width - 2);		}		else		{			/* increase 'first contributing pixel' with actual number of dest. clipping pixels */			hsrcstv += (crtc_hstart - ow->h_start);		}		LOG(4,("Overlay: clipping left...\n"));		/* The calculated value is based on scaling = 1x. So we now compensate for scaling.		 * Note that this also already takes care of aligning the value to the BES register! */		hsrcstv *= ifactor;	}	/* take zoom into account */	hsrcstv += ((uint32)my_ov.h_start) << 16;	/* AND below required by hardware */	hsrcstv &= 0x03fffffc;	LOG(4,("Overlay: first hor. (sub)pixel of input bitmap contributing %f\n", hsrcstv / (float)65536));	/*******************************************	 *** setup vertical scaling and clipping ***	 *******************************************/	/* do vertical scaling... */	/* determine interval representation value, taking zoom into account */	if (ow->flags & B_OVERLAY_VERTICAL_FILTERING)	{		/* vertical filtering is ON */		if ((my_ov.height == ow->height) | (ow->height < 2))		{			/* no vertical scaling used, OR destination height < 2 */			intrep = 0;		}		else		{			intrep = 1;		}	}	else	{		/* vertical filtering is OFF */		if ((ow->height < my_ov.height) & (ow->height >= 2))		{			/* vertical downscaling used AND destination height >= 2 */			intrep = 1;		}		else		{			intrep = 0;		}	}	LOG(4,("Overlay: vertical interval representation value is %d\n",intrep));	/* calculate inverse vertical scaling factor, taking zoom into account */	/* standard scaling formula: */	ifactor = (((uint32)(my_ov.height - intrep)) << 16) / (ow->height - intrep); 	/* correct factor to prevent lowest visible line from distorting */	ifactor -= (1 << 2);	LOG(4,("Overlay: vertical scaling factor is %f\n", (float)65536 / ifactor));	/* preserve ifactor for source positioning calculations later on */	viscalv = ifactor;	/* check scaling factor (and modify if needed) to be within scaling limits */	/* (assuming) all cards have a upscaling limit of 8.0 */	if (viscalv < 0x00002000)	{		/* (non-inverse) factor too large, set factor to max. valid value */		viscalv = 0x00002000;		LOG(4,("Overlay: vertical scaling factor too large, clamping at %f\n", (float)65536 / viscalv));	}	switch (si->ps.card_arch)	{	case NV04A:		/* Riva128-TNT2 series have a 'downscaling' limit of 1.000489		 * (16bit register with 0.11 format value) */		if (viscalv > 0x0000ffff)		{			/* (non-inverse) factor too small, set factor to min. valid value */			viscalv = 0x0000ffff;			LOG(4,("Overlay: vertical scaling factor too small, clamping at %f\n", (float)2048 / (viscalv >> 5)));		}		break;	case NV30A:		/* GeForceFX series have a downscaling limit of 0.5 */		if (viscalv > (2 << 16))		{			/* (non-inverse) factor too small, set factor to min. valid value */			viscalv = (2 << 16);			LOG(4,("Overlay: vertical scaling factor too small, clamping at %f\n", (float)65536 / viscalv));		}		break;	default:		/* the rest has a downscaling limit of 0.125 */		if (viscalv > (8 << 16))		{			/* (non-inverse) factor too small, set factor to min. valid value */			viscalv = (8 << 16);			LOG(4,("Overlay: vertical scaling factor too small, clamping at %f\n", (float)65536 / viscalv));		}		break;	}	/* AND below is required by hardware */	viscalv &= 0x001ffffc;	/* calculate inputbitmap origin adress */	a1orgv = (uint32)((vuint32 *)ob->buffer);	a1orgv -= (uint32)((vuint32 *)si->framebuffer);	/* do vertical clipping... */	/* Setup vertical source start: first (sub)pixel contributing to output picture. */	/* Note:	 * The method is to calculate, based on 1:1 scaling, based on the output window.	 * 'After' this is done, include the scaling factor so you get a value based on the input bitmap. 	 * Then add the top starting position of the bitmap's view (zoom function) to get the final value needed. */	/* Note also:	 * Even if the scaling factor is clamping we instruct the BES to use the correct source start pos.! */	v1srcstv = 0;	/* check for destination vertical clipping at top side */	if (ow->v_start < crtc_vstart)	{		/* check if entire destination picture is clipping at top:		 * (2 pixels will be clamped onscreen at least) */		if ((ow->v_start + ow->height - 1) < (crtc_vstart + 1))		{			/* increase 'number of clipping pixels' with 'fixed value':			 * 'total height - 2' of dest. picture in pixels * inverse scaling factor */			v1srcstv = (ow->height - 2) * ifactor;			/* on pre-NV10 we need to do clipping in the source			 * bitmap because no seperate clipping registers exist... */			if (si->ps.card_arch < NV10A)				a1orgv += ((v1srcstv >> 16) * ob->bytes_per_row);		}		else		{			/* increase 'first contributing pixel' with:			 * number of destination picture clipping pixels * inverse scaling factor */			v1srcstv = (crtc_vstart - ow->v_start) * ifactor;			/* on pre-NV10 we need to do clipping in the source			 * bitmap because no seperate clipping registers exist... */			if (si->ps.card_arch < NV10A)				a1orgv += ((v1srcstv >> 16) * ob->bytes_per_row);		}		LOG(4,("Overlay: clipping at top...\n"));	}	/* take zoom into account */	v1srcstv += (((uint32)my_ov.v_start) << 16);	if (si->ps.card_arch < NV10A)	{		a1orgv += (my_ov.v_start * ob->bytes_per_row);		LOG(4,("Overlay: 'contributing part of buffer' origin is (cardRAM offset) $%08x\n", a1orgv));	}	LOG(4,("Overlay: first vert. (sub)pixel of input bitmap contributing %f\n", v1srcstv / (float)65536));	/* AND below is probably required by hardware. */	/* Buffer A topleft corner of field 1 (origin)(field 1 contains our full frames) */	a1orgv &= 0xfffffff0;	LOG(4,("Overlay: topleft corner of input bitmap (cardRAM offset) $%08x\n",a1orgv));	/*****************************	 *** log color keying info ***	 *****************************/	LOG(6,("Overlay: key_red %d, key_green %d, key_blue %d, key_alpha %d\n",		ow->red.value, ow->green.value, ow->blue.value, ow->alpha.value));	LOG(6,("Overlay: mask_red %d, mask_green %d, mask_blue %d, mask_alpha %d\n",		ow->red.mask, ow->green.mask, ow->blue.mask, ow->alpha.mask));	/*****************	 *** log flags ***	 *****************/	LOG(6,("Overlay: ow->flags is $%08x\n",ow->flags));	/* BTW: horizontal and vertical filtering are fixed and turned on for GeForce overlay. */	/*************************************	 *** sync to BES (Back End Scaler) ***	 *************************************/	/* Done in card hardware:	 * double buffered registers + trigger if programming complete feature. */	/**************************************	 *** actually program the registers ***	 **************************************/	if (si->ps.card_arch < NV10A)	{		/* unknown, but needed (otherwise high-res distortions and only half the frames */		BESW(NV04_OE_STATE, 0x00000000);		/* select buffer 0 as active (b16) */		BESW(NV04_SU_STATE, 0x00000000);		/* unknown (no effect?) */		BESW(NV04_RM_STATE, 0x00000000);		/* setup clipped(!) buffer startadress in RAM */		/* RIVA128 - TNT bes doesn't have clipping registers, so no subpixelprecise clipping		 * either. We do pixelprecise vertical and 'two pixel' precise horizontal clipping here. */		/* (program both buffers to prevent sync distortions) */		/* first include 'pixel precise' left clipping... (top clipping was already included) */		a1orgv += ((hsrcstv >> 16) * 2);		/* we need to step in 4-byte (2 pixel) granularity due to the nature of yuy2 */		BESW(NV04_0BUFADR, (a1orgv & ~0x03));		BESW(NV04_1BUFADR, (a1orgv & ~0x03));		/* setup buffer source pitch including slopspace (in bytes).		 * Note:		 * source pitch granularity = 16 pixels on the RIVA128 - TNT (so pre-NV10) bes */		/* (program both buffers to prevent sync distortions) */		BESW(NV04_0SRCPTCH, (ob->width * 2));		BESW(NV04_1SRCPTCH, (ob->width * 2));		/* setup output window position */		BESW(NV04_DSTREF, ((vcoordv & 0xffff0000) | ((hcoordv & 0xffff0000) >> 16)));		/* setup output window size */		BESW(NV04_DSTSIZE, (			(((vcoordv & 0x0000ffff) - ((vcoordv & 0xffff0000) >> 16) + 1) << 16) |			((hcoordv & 0x0000ffff) - ((hcoordv & 0xffff0000) >> 16) + 1)			));		/* setup horizontal and vertical scaling */		BESW(NV04_ISCALVH, (((viscalv << 16) >> 5) | (hiscalv >> 5)));		/* enable vertical filtering (b0) */		BESW(NV04_CTRL_V, 0x00000001);		/* enable horizontal filtering (no effect?) */		BESW(NV04_CTRL_H, 0x00000111);		/* enable BES (b0), enable colorkeying (b4), format yuy2 (b8: 0 = ccir) */		BESW(NV04_GENCTRL, 0x00000111);		/* select buffer 1 as active (b16) */		BESW(NV04_SU_STATE, 0x00010000);		/**************************		 *** setup color keying ***		 **************************/		/* setup colorkeying */		switch(si->dm.space)		{		case B_RGB15_LITTLE:			BESW(NV04_COLKEY, (				((ow->blue.value & ow->blue.mask) << 0)   |				((ow->green.value & ow->green.mask) << 5) |				((ow->red.value & ow->red.mask) << 10)    |				((ow->alpha.value & ow->alpha.mask) << 15)				));			break;		case B_RGB16_LITTLE:			BESW(NV04_COLKEY, (				((ow->blue.value & ow->blue.mask) << 0)   |				((ow->green.value & ow->green.mask) << 5) |				((ow->red.value & ow->red.mask) << 11)				/* this space has no alpha bits */				));			break;		case B_CMAP8:		case B_RGB32_LITTLE:		default:			BESW(NV04_COLKEY, (				((ow->blue.value & ow->blue.mask) << 0)   |				((ow->green.value & ow->green.mask) << 8) |				((ow->red.value & ow->red.mask) << 16)    |				((ow->alpha.value & ow->alpha.mask) << 24)				));			break;		}	}	else	{		/* >= NV10A */			/* setup buffer origin: GeForce uses subpixel precise clipping on left and top! (12.4 values) */		BESW(NV10_0SRCREF, ((v1srcstv << 4) & 0xffff0000) | ((hsrcstv >> 12) & 0x0000ffff));		/* setup buffersize */		//fixme if needed: width must be even officially...		BESW(NV10_0SRCSIZE, ((ob->height << 16) | ob->width));		/* setup source pitch including slopspace (in bytes),		 * b16: select YUY2 (0 = YV12), b20: use colorkey, b24: no iturbt_709 (do iturbt_601) */		/* Note:		 * source pitch granularity = 32 pixels on GeForce cards!! */		BESW(NV10_0SRCPTCH, (((ob->width * 2) & 0x0000ffff) | (1 << 16) | (1 << 20) | (0 << 24)));		/* setup output window position */		BESW(NV10_0DSTREF, ((vcoordv & 0xffff0000) | ((hcoordv & 0xffff0000) >> 16)));		/* setup output window size */		BESW(NV10_0DSTSIZE, (			(((vcoordv & 0x0000ffff) - ((vcoordv & 0xffff0000) >> 16) + 1) << 16) |			((hcoordv & 0x0000ffff) - ((hcoordv & 0xffff0000) >> 16) + 1)			));		/* setup horizontal scaling */		BESW(NV10_0ISCALH, (hiscalv << 4));		/* setup vertical scaling */		BESW(NV10_0ISCALV, (viscalv << 4));		/* setup (unclipped!) buffer startadress in RAM */		BESW(NV10_0BUFADR, a1orgv);		/* enable BES (b0 = 0) */		BESW(NV10_GENCTRL, 0x00000000);		/* We only use buffer buffer 0: select it. (0x01 = buffer 0, 0x10 = buffer 1) */		/* This also triggers activation of programmed values (double buffered registers feature) */		BESW(NV10_BUFSEL, 0x00000001);		/**************************		 *** setup color keying ***		 **************************/		/* setup colorkeying */		switch(si->dm.space)		{		case B_RGB15_LITTLE:			BESW(NV10_COLKEY, (				((ow->blue.value & ow->blue.mask) << 0)   |				((ow->green.value & ow->green.mask) << 5) |				((ow->red.value & ow->red.mask) << 10)    |				((ow->alpha.value & ow->alpha.mask) << 15)				));			break;		case B_RGB16_LITTLE:			BESW(NV10_COLKEY, (				((ow->blue.value & ow->blue.mask) << 0)   |				((ow->green.value & ow->green.mask) << 5) |				((ow->red.value & ow->red.mask) << 11)				/* this space has no alpha bits */				));			break;		case B_CMAP8:		case B_RGB32_LITTLE:		default:			BESW(NV10_COLKEY, (				((ow->blue.value & ow->blue.mask) << 0)   |				((ow->green.value & ow->green.mask) << 8) |				((ow->red.value & ow->red.mask) << 16)    |				((ow->alpha.value & ow->alpha.mask) << 24)				));			break;		}	}	return B_OK;}