ffb_state.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

		tmp = (fmesa->ppc & ~FFB_PPC_ABE_MASK);
		if (state) {
			tmp |= FFB_PPC_ABE_ENABLE;
		} else {
			tmp |= FFB_PPC_ABE_DISABLE;
		}
		if (fmesa->ppc != tmp) {
			fmesa->ppc = tmp;
			FFB_MAKE_DIRTY(fmesa, FFB_STATE_PPC, 1);
			ffbDDBlendFuncSeparate(ctx, 0, 0, 0, 0 );
		}
		break;

	case GL_DEPTH_TEST:
		if (state)
			tmp = 0x0fffffff;
		else
			tmp = 0x00000000;
		if (tmp != fmesa->magnc) {
			unsigned int fbc = fmesa->fbc;
			fbc &= ~FFB_FBC_ZE_MASK;
			if (state)
				fbc |= FFB_FBC_ZE_ON;
			else
				fbc |= FFB_FBC_ZE_OFF;
			fmesa->fbc = fbc;
			ffbDDDepthFunc(ctx, ctx->Depth.Func);
			fmesa->magnc = tmp;
			FFB_MAKE_DIRTY(fmesa, (FFB_STATE_MAGNC | FFB_STATE_FBC), 2);
		}
		break;

	case GL_SCISSOR_TEST:
		ffbDDScissor(ctx, ctx->Scissor.X, ctx->Scissor.Y,
			     ctx->Scissor.Width, ctx->Scissor.Height);
		break;

	case GL_STENCIL_TEST:
		if (!(fmesa->ffb_sarea->flags & FFB_DRI_FFB2PLUS)) {
			FALLBACK( ctx, FFB_BADATTR_STENCIL, state );
		}

		tmp = fmesa->fbc & ~FFB_FBC_YE_MASK;
		if (state) {
			ffbDDStencilFuncSeparate(ctx, GL_FRONT,
					 ctx->Stencil.Function[0],
					 ctx->Stencil.Ref[0],
					 ctx->Stencil.ValueMask[0]);
			ffbDDStencilMaskSeparate(ctx, GL_FRONT,
                                                 ctx->Stencil.WriteMask[0]);
			ffbDDStencilOpSeparate(ctx, GL_FRONT,
				       ctx->Stencil.FailFunc[0],
				       ctx->Stencil.ZFailFunc[0],
				       ctx->Stencil.ZPassFunc[0]);
			tmp |= FFB_FBC_YE_MASK;
		} else {
			fmesa->stencil		= 0xf0000000;
			fmesa->stencilctl	= 0x33300000;
			FFB_MAKE_DIRTY(fmesa, FFB_STATE_STENCIL, 6);
			tmp |= FFB_FBC_YE_OFF;
		}
		if (tmp != fmesa->fbc) {
			fmesa->fbc = tmp;
			FFB_MAKE_DIRTY(fmesa, FFB_STATE_FBC, 1);
		}
		break;

	case GL_FOG:
		/* Until I implement the fog support... */
		FALLBACK( ctx, FFB_BADATTR_FOG, state );
		break;

	case GL_LINE_STIPPLE:
		if (! state)
			fmesa->lpat = 0;
		else
			ffbDDLineStipple(ctx,
					 ctx->Line.StippleFactor,
					 ctx->Line.StipplePattern);
		break;

	case GL_POLYGON_STIPPLE:
		/* Do nothing, we interrogate the state during
		 * reduced primitive changes.  Since our caller
		 * will set NEW_POLYGON in the ctx NewState this
		 * will cause the driver rasterization functions
		 * to be reevaluated, which will cause us to force
		 * a reduced primitive change next rendering pass
		 * and it all works out.
		 */
		break;

	default:
		break;
	};
}

void ffbSyncHardware(ffbContextPtr fmesa)
{
	ffb_fbcPtr ffb = fmesa->regs;
	unsigned int dirty;
	int i;

	FFBFifo(fmesa, fmesa->state_fifo_ents);

	dirty = fmesa->state_dirty;
	if (dirty & (FFB_STATE_FBC | FFB_STATE_PPC | FFB_STATE_DRAWOP |
		     FFB_STATE_ROP | FFB_STATE_LPAT | FFB_STATE_WID)) {
		if (dirty & FFB_STATE_FBC)
			ffb->fbc = fmesa->fbc;
		if (dirty & FFB_STATE_PPC)
			ffb->ppc = fmesa->ppc;
		if (dirty & FFB_STATE_DRAWOP)
			ffb->drawop = fmesa->drawop;
		if (dirty & FFB_STATE_ROP)
			ffb->rop = fmesa->rop;
		if (dirty & FFB_STATE_LPAT)
			ffb->rop = fmesa->lpat;
		if (dirty & FFB_STATE_WID)
			ffb->wid = fmesa->wid;
	}
	if (dirty & (FFB_STATE_PMASK | FFB_STATE_XPMASK | FFB_STATE_YPMASK |
		     FFB_STATE_ZPMASK | FFB_STATE_XCLIP | FFB_STATE_CMP |
		     FFB_STATE_MATCHAB | FFB_STATE_MAGNAB | FFB_STATE_MATCHC |
		     FFB_STATE_MAGNC)) {
		if (dirty & FFB_STATE_PMASK)
			ffb->pmask = fmesa->pmask;
		if (dirty & FFB_STATE_XPMASK)
			ffb->xpmask = fmesa->xpmask;
		if (dirty & FFB_STATE_YPMASK)
			ffb->ypmask = fmesa->ypmask;
		if (dirty & FFB_STATE_ZPMASK)
			ffb->zpmask = fmesa->zpmask;
		if (dirty & FFB_STATE_XCLIP)
			ffb->xclip = fmesa->xclip;
		if (dirty & FFB_STATE_CMP)
			ffb->cmp = fmesa->cmp;
		if (dirty & FFB_STATE_MATCHAB)
			ffb->matchab = fmesa->matchab;
		if (dirty & FFB_STATE_MAGNAB)
			ffb->magnab = fmesa->magnab;
		if (dirty & FFB_STATE_MATCHC)
			ffb->matchc = fmesa->matchc;
		if (dirty & FFB_STATE_MAGNC)
			ffb->magnc = fmesa->magnc;
	}

	if (dirty & FFB_STATE_DCUE) {
		ffb->dcss = fmesa->dcss;
		ffb->dcsf = fmesa->dcsf;
		ffb->dcsb = fmesa->dcsb;
		ffb->dczf = fmesa->dczf;
		ffb->dczb = fmesa->dczb;
		if (fmesa->ffb_sarea->flags & (FFB_DRI_FFB2 | FFB_DRI_FFB2PLUS)) {
			ffb->dcss1 = fmesa->dcss1;
			ffb->dcss2 = fmesa->dcss2;
			ffb->dcss3 = fmesa->dcss3;
			ffb->dcs2  = fmesa->dcs2;
			ffb->dcs3  = fmesa->dcs3;
			ffb->dcs4  = fmesa->dcs4;
			ffb->dcd2  = fmesa->dcd2;
			ffb->dcd3  = fmesa->dcd3;
			ffb->dcd4  = fmesa->dcd4;
		}
	}

	if (dirty & FFB_STATE_BLEND) {
		ffb->blendc  = fmesa->blendc;
		ffb->blendc1 = fmesa->blendc1;
		ffb->blendc2 = fmesa->blendc2;
	}

	if (dirty & FFB_STATE_CLIP) {
		ffb->vclipmin  = fmesa->vclipmin;
		ffb->vclipmax  = fmesa->vclipmax;
		ffb->vclipzmin = fmesa->vclipzmin;
		ffb->vclipzmax = fmesa->vclipzmax;
		for (i = 0; i < 4; i++) {
			ffb->auxclip[i].min = fmesa->aux_clips[i].min;
			ffb->auxclip[i].max = fmesa->aux_clips[i].max;
		}
	}

	if ((dirty & FFB_STATE_STENCIL) &&
	    (fmesa->ffb_sarea->flags & FFB_DRI_FFB2PLUS)) {
		ffb->stencil    = fmesa->stencil;
		ffb->stencilctl = fmesa->stencilctl;
		ffb->fbc = FFB_FBC_WB_C;
		ffb->rawstencilctl = (fmesa->stencilctl | (1 << 19));
		ffb->fbc = fmesa->fbc;
		ffb->consty = fmesa->consty;
	}

	if (dirty & FFB_STATE_APAT) {
		for (i = 0; i < 32; i++)
			ffb->pattern[i] = fmesa->pattern[i];
	}

	fmesa->state_dirty = 0;
	fmesa->state_fifo_ents = 0;
	fmesa->ffbScreen->rp_active = 1;
}

static void ffbDDUpdateState(GLcontext *ctx, GLuint newstate)
{
	ffbContextPtr fmesa = FFB_CONTEXT(ctx);

	/* When we are hw rendering, changing certain kinds of
	 * state does not require flushing all of our context.
	 */
	if (fmesa->bad_fragment_attrs == 0 &&
	    (newstate & ~_NEW_COLOR) == 0)
		return;

	_swrast_InvalidateState( ctx, newstate );
	_swsetup_InvalidateState( ctx, newstate );
	_vbo_InvalidateState( ctx, newstate );
	_tnl_InvalidateState( ctx, newstate );

	if (newstate & _NEW_TEXTURE)
	   FALLBACK( ctx, FFB_BADATTR_TEXTURE, 
		     (ctx->Texture._EnabledUnits != 0));

#ifdef STATE_TRACE
	fprintf(stderr, "ffbDDUpdateState: newstate(%08x)\n", newstate);
#endif

	fmesa->new_gl_state |= newstate;

	/* Force a reduced primitive change next rendering
	 * pass.
	 */
	fmesa->raster_primitive = GL_POLYGON + 1;

#if 0
	/* When the modelview matrix changes, this changes what
	 * the eye coordinates will be so we have to recompute
	 * the depth cueing parameters.
	 *
	 * XXX DD_HAVE_HARDWARE_FOG.
	 */
	if (ctx->Fog.Enabled && (newstate & _NEW_MODELVIEW))
		ffb_update_fog();
#endif
}


void ffbDDInitStateFuncs(GLcontext *ctx)
{
	ffbContextPtr fmesa = FFB_CONTEXT(ctx);

	ctx->Driver.UpdateState = ffbDDUpdateState;

	ctx->Driver.Enable = ffbDDEnable;
	ctx->Driver.AlphaFunc = ffbDDAlphaFunc;
	ctx->Driver.BlendEquationSeparate = ffbDDBlendEquationSeparate;
	ctx->Driver.BlendFuncSeparate = ffbDDBlendFuncSeparate;
	ctx->Driver.DepthFunc = ffbDDDepthFunc;
	ctx->Driver.DepthMask = ffbDDDepthMask;
	ctx->Driver.Fogfv = ffbDDFogfv;
	ctx->Driver.LineStipple = ffbDDLineStipple;
	ctx->Driver.PolygonStipple = ffbDDPolygonStipple;
	ctx->Driver.Scissor = ffbDDScissor;
	ctx->Driver.ColorMask = ffbDDColorMask;
	ctx->Driver.LogicOpcode = ffbDDLogicOp;
	ctx->Driver.Viewport = ffbDDViewport;
	ctx->Driver.DepthRange = ffbDDDepthRange;

	if (fmesa->ffb_sarea->flags & FFB_DRI_FFB2PLUS) {
		ctx->Driver.StencilFuncSeparate = ffbDDStencilFuncSeparate;
		ctx->Driver.StencilMaskSeparate = ffbDDStencilMaskSeparate;
		ctx->Driver.StencilOpSeparate = ffbDDStencilOpSeparate;
	}

	ctx->Driver.DrawBuffer = ffbDDDrawBuffer;
	ctx->Driver.ReadBuffer = ffbDDReadBuffer;
	ctx->Driver.ClearColor = ffbDDClearColor;
	ctx->Driver.ClearDepth = ffbDDClearDepth;
	ctx->Driver.ClearStencil = ffbDDClearStencil;

	/* We will support color index modes later... -DaveM */
        /*
	ctx->Driver.ClearIndex = 0;
	ctx->Driver.IndexMask = 0;
        */
}

void ffbDDInitContextHwState(GLcontext *ctx)
{
	ffbContextPtr fmesa = FFB_CONTEXT(ctx);
	int fifo_count = 0;
	int i;

	fmesa->hw_locked = 0;

	fmesa->bad_fragment_attrs = 0;
	fmesa->state_dirty = FFB_STATE_ALL;
	fmesa->new_gl_state = ~0;

	fifo_count = 1;
	fmesa->fbc = (FFB_FBC_WE_FORCEON | FFB_FBC_WM_COMBINED |
		      FFB_FBC_SB_BOTH | FFB_FBC_ZE_MASK |
		      FFB_FBC_YE_OFF | FFB_FBC_XE_OFF |
		      FFB_FBC_RGBE_MASK);
	if (ctx->Visual.doubleBufferMode) {
		/* Buffer B is the initial back buffer. */
		fmesa->back_buffer = 1;
		fmesa->fbc |= FFB_FBC_WB_BC | FFB_FBC_RB_B;
	} else {
		fmesa->back_buffer = 0;
		fmesa->fbc |= FFB_FBC_WB_A | FFB_FBC_RB_A;
	}

	fifo_count += 1;
	fmesa->ppc = (FFB_PPC_ACE_DISABLE | FFB_PPC_DCE_DISABLE |
		      FFB_PPC_ABE_DISABLE | FFB_PPC_VCE_3D |
		      FFB_PPC_APE_DISABLE | FFB_PPC_TBE_OPAQUE |
		      FFB_PPC_ZS_CONST | FFB_PPC_YS_CONST |
		      FFB_PPC_XS_WID | FFB_PPC_CS_VAR);

	fifo_count += 3;
	fmesa->drawop = FFB_DRAWOP_RECTANGLE;

	/* GL_COPY is the default LogicOp. */
	fmesa->rop = (FFB_ROP_NEW << 16) | (FFB_ROP_NEW << 8) | FFB_ROP_NEW;

	/* No line patterning enabled. */
	fmesa->lpat = 0x00000000;

	/* We do not know the WID value until the first context switch. */
	fifo_count += 1;
	fmesa->wid = ~0;

	fifo_count += 5;

	/* ColorMask, all enabled. */
	fmesa->pmask  = 0xffffffff;

	fmesa->xpmask = 0x000000ff;
	fmesa->ypmask = 0x0000000f;
	fmesa->zpmask = 0x0fffffff;

	/* AlphaFunc GL_ALWAYS, AlphaRef 0 */
	fmesa->xclip  = FFB_XCLIP_TEST_ALWAYS | 0x00;

	/* This sets us up to use WID clipping (so the DRI clipping
	 * rectangle is unneeded by us).  All other match and magnitude
	 * tests are set to pass.
	 */
	fifo_count += 5;
	fmesa->cmp = ((FFB_CMP_MATCH_ALWAYS << 24) |	/* MATCH C  */
		      (FFB_CMP_MAGN_ALWAYS  << 16) |	/* MAGN  C  */
		      (FFB_CMP_MATCH_EQ     <<  8) |	/* MATCH AB */
		      (FFB_CMP_MAGN_ALWAYS  <<  0));	/* MAGN  AB */
	fmesa->matchab = 0xff000000;
	fmesa->magnab  = 0x00000000;
	fmesa->matchc  = 0x00000000;
	fmesa->magnc   = 0x00000000;

	/* Depth cue parameters, all zeros to start. */
	fifo_count += 14;
	fmesa->dcss  = 0x00000000;
	fmesa->dcsf  = 0x00000000;
	fmesa->dcsb  = 0x00000000;
	fmesa->dczf  = 0x00000000;
	fmesa->dczb  = 0x00000000;
	fmesa->dcss1 = 0x00000000;
	fmesa->dcss2 = 0x00000000;
	fmesa->dcss3 = 0x00000000;
	fmesa->dcs2  = 0x00000000;
	fmesa->dcs3  = 0x00000000;
	fmesa->dcs4  = 0x00000000;
	fmesa->dcd2  = 0x00000000;
	fmesa->dcd3  = 0x00000000;
	fmesa->dcd4  = 0x00000000;

	/* Alpha blending unit state. */
	fifo_count += 3;
	fmesa->blendc  = (1 << 0) | (0 << 2);  /* src(GL_ONE) | dst(GL_ZERO) */
	fmesa->blendc1 = 0x00000000;
	fmesa->blendc2 = 0x00000000;

	/* ViewPort clip state. */
	fifo_count += 4 + (4 * 2);
	fmesa->vclipmin  = 0x00000000;
	fmesa->vclipmax  = 0xffffffff;
	fmesa->vclipzmin = 0x00000000;
	fmesa->vclipzmax = 0x0fffffff;
	for (i = 0; i < 4; i++) {
		fmesa->aux_clips[0].min = 0x00000000;
		fmesa->aux_clips[0].max = 0x00000000;
	}

	/* Stenciling state. */
	fifo_count += 6;
	fmesa->stencil    = 0xf0000000; /* Stencil MASK, Y plane */
	fmesa->stencilctl = 0x33300000; /* All stencil tests disabled */
	fmesa->consty	  = 0x0;

	/* Area pattern, used for polygon stipples. */
	fifo_count += 32;
	for (i = 0; i < 32; i++)
		fmesa->pattern[i] = 0x00000000;

	fmesa->state_fifo_ents = fifo_count;
	fmesa->state_all_fifo_ents = fifo_count;
}