path: root/src/i830_render.c

/*
 * Copyright © 2006 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Authors:
 *    Wang Zhenyu <zhenyu.z.wang@intel.com>
 *    Eric Anholt <eric@anholt.net>
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "xf86.h"
#include "i830.h"
#include "i830_reg.h"

#ifdef I830DEBUG
#define DEBUG_I830FALLBACK 1
#endif

#ifdef DEBUG_I830FALLBACK
#define I830FALLBACK(s, arg...)				\
do {							\
	DPRINTF(PFX, "EXA fallback: " s "\n", ##arg); 	\
	return FALSE;					\
} while(0)
#else
#define I830FALLBACK(s, arg...) 			\
do { 							\
	return FALSE;					\
} while(0)
#endif

struct blendinfo {
    Bool dst_alpha;
    Bool src_alpha;
    uint32_t src_blend;
    uint32_t dst_blend;
};

struct formatinfo {
    int fmt;
    uint32_t card_fmt;
};

#define TB0C_LAST_STAGE	(1 << 31)
#define TB0C_RESULT_SCALE_1X		(0 << 29)
#define TB0C_RESULT_SCALE_2X		(1 << 29)
#define TB0C_RESULT_SCALE_4X		(2 << 29)
#define TB0C_OP_MODULE			(3 << 25)
#define TB0C_OUTPUT_WRITE_CURRENT	(0 << 24)
#define TB0C_OUTPUT_WRITE_ACCUM		(1 << 24)
#define TB0C_ARG3_REPLICATE_ALPHA 	(1<<23)
#define TB0C_ARG3_INVERT		(1<<22)
#define TB0C_ARG3_SEL_XXX
#define TB0C_ARG2_REPLICATE_ALPHA 	(1<<17)
#define TB0C_ARG2_INVERT		(1<<16)
#define TB0C_ARG2_SEL_ONE		(0 << 12)
#define TB0C_ARG2_SEL_FACTOR		(1 << 12)
#define TB0C_ARG2_SEL_TEXEL0		(6 << 12)
#define TB0C_ARG2_SEL_TEXEL1		(7 << 12)
#define TB0C_ARG2_SEL_TEXEL2		(8 << 12)
#define TB0C_ARG2_SEL_TEXEL3		(9 << 12)
#define TB0C_ARG1_REPLICATE_ALPHA 	(1<<11)
#define TB0C_ARG1_INVERT		(1<<10)
#define TB0C_ARG1_SEL_ONE		(0 << 6)
#define TB0C_ARG1_SEL_TEXEL0		(6 << 6)
#define TB0C_ARG1_SEL_TEXEL1		(7 << 6)
#define TB0C_ARG1_SEL_TEXEL2		(8 << 6)
#define TB0C_ARG1_SEL_TEXEL3		(9 << 6)
#define TB0C_ARG0_REPLICATE_ALPHA 	(1<<5)
#define TB0C_ARG0_SEL_XXX

#define TB0A_CTR_STAGE_ENABLE 		(1<<31)
#define TB0A_RESULT_SCALE_1X		(0 << 29)
#define TB0A_RESULT_SCALE_2X		(1 << 29)
#define TB0A_RESULT_SCALE_4X		(2 << 29)
#define TB0A_OP_MODULE			(3 << 25)
#define TB0A_OUTPUT_WRITE_CURRENT	(0<<24)
#define TB0A_OUTPUT_WRITE_ACCUM		(1<<24)
#define TB0A_CTR_STAGE_SEL_BITS_XXX
#define TB0A_ARG3_SEL_XXX
#define TB0A_ARG3_INVERT		(1<<17)
#define TB0A_ARG2_INVERT		(1<<16)
#define TB0A_ARG2_SEL_ONE		(0 << 12)
#define TB0A_ARG2_SEL_TEXEL0		(6 << 12)
#define TB0A_ARG2_SEL_TEXEL1		(7 << 12)
#define TB0A_ARG2_SEL_TEXEL2		(8 << 12)
#define TB0A_ARG2_SEL_TEXEL3		(9 << 12)
#define TB0A_ARG1_INVERT		(1<<10)
#define TB0A_ARG1_SEL_ONE		(0 << 6)
#define TB0A_ARG1_SEL_TEXEL0		(6 << 6)
#define TB0A_ARG1_SEL_TEXEL1		(7 << 6)
#define TB0A_ARG1_SEL_TEXEL2		(8 << 6)
#define TB0A_ARG1_SEL_TEXEL3		(9 << 6)

static struct blendinfo i830_blend_op[] = {
    /* Clear */
    {0, 0, BLENDFACTOR_ZERO, 		BLENDFACTOR_ZERO},
    /* Src */
    {0, 0, BLENDFACTOR_ONE, 		BLENDFACTOR_ZERO},
    /* Dst */
    {0, 0, BLENDFACTOR_ZERO,		BLENDFACTOR_ONE},
    /* Over */
    {0, 1, BLENDFACTOR_ONE,		BLENDFACTOR_INV_SRC_ALPHA},
    /* OverReverse */
    {1, 0, BLENDFACTOR_INV_DST_ALPHA,	BLENDFACTOR_ONE},
    /* In */
    {1, 0, BLENDFACTOR_DST_ALPHA,	BLENDFACTOR_ZERO},
    /* InReverse */
    {0, 1, BLENDFACTOR_ZERO,		BLENDFACTOR_SRC_ALPHA},
    /* Out */
    {1, 0, BLENDFACTOR_INV_DST_ALPHA,	BLENDFACTOR_ZERO},
    /* OutReverse */
    {0, 1, BLENDFACTOR_ZERO,		BLENDFACTOR_INV_SRC_ALPHA},
    /* Atop */
    {1, 1, BLENDFACTOR_DST_ALPHA,	BLENDFACTOR_INV_SRC_ALPHA},
    /* AtopReverse */
    {1, 1, BLENDFACTOR_INV_DST_ALPHA,	BLENDFACTOR_SRC_ALPHA},
    /* Xor */
    {1, 1, BLENDFACTOR_INV_DST_ALPHA,	BLENDFACTOR_INV_SRC_ALPHA},
    /* Add */
    {0, 0, BLENDFACTOR_ONE, 		BLENDFACTOR_ONE},
};

/* The x8* formats could use MT_32BIT_X* on 855+, but since we implement
 * workarounds for 830/845 anyway, we just rely on those whether the hardware
 * could handle it for us or not.
 */
static struct formatinfo i830_tex_formats[] = {
    {PICT_a8r8g8b8, MT_32BIT_ARGB8888 },
    {PICT_x8r8g8b8, MT_32BIT_ARGB8888 },
    {PICT_a8b8g8r8, MT_32BIT_ABGR8888 },
    {PICT_x8b8g8r8, MT_32BIT_ABGR8888 },
    {PICT_r5g6b5,   MT_16BIT_RGB565   },
    {PICT_a1r5g5b5, MT_16BIT_ARGB1555 },
    {PICT_x1r5g5b5, MT_16BIT_ARGB1555 },
    {PICT_a8,       MT_8BIT_A8        },
};

static Bool i830_get_dest_format(PicturePtr pDstPicture, uint32_t *dst_format)
{
    switch (pDstPicture->format) {
    case PICT_a8r8g8b8:
    case PICT_x8r8g8b8:
        *dst_format = COLR_BUF_ARGB8888;
        break;
    case PICT_r5g6b5:
        *dst_format = COLR_BUF_RGB565;
        break;
    case PICT_a1r5g5b5:
    case PICT_x1r5g5b5:
        *dst_format = COLR_BUF_ARGB1555;
        break;
	/*
    case PICT_a8:
        *dst_format = COLR_BUF_8BIT;
        break;
	*/
    case PICT_a4r4g4b4:
    case PICT_x4r4g4b4:
	*dst_format = COLR_BUF_ARGB4444;
	break;
    default:
        I830FALLBACK("Unsupported dest format 0x%x\n",
		     (int)pDstPicture->format);
    }

    return TRUE;
}


static uint32_t i830_get_blend_cntl(int op, PicturePtr pMask,
				    uint32_t dst_format)
{
    uint32_t sblend, dblend;

    sblend = i830_blend_op[op].src_blend;
    dblend = i830_blend_op[op].dst_blend;

    /* If there's no dst alpha channel, adjust the blend op so that we'll treat
     * it as always 1.
     */
    if (PICT_FORMAT_A(dst_format) == 0 && i830_blend_op[op].dst_alpha) {
        if (sblend == BLENDFACTOR_DST_ALPHA)
            sblend = BLENDFACTOR_ONE;
        else if (sblend == BLENDFACTOR_INV_DST_ALPHA)
            sblend = BLENDFACTOR_ZERO;
    }

    /* If the source alpha is being used, then we should only be in a case
     * where the source blend factor is 0, and the source blend value is the
     * mask channels multiplied by the source picture's alpha.
     */
    if (pMask && pMask->componentAlpha && PICT_FORMAT_RGB(pMask->format) 
	    && i830_blend_op[op].src_alpha) {
        if (dblend == BLENDFACTOR_SRC_ALPHA) {
            dblend = BLENDFACTOR_SRC_COLR;
        } else if (dblend == BLENDFACTOR_INV_SRC_ALPHA) {
            dblend = BLENDFACTOR_INV_SRC_COLR;
        }
    }

    return (sblend << S8_SRC_BLEND_FACTOR_SHIFT) |
	(dblend << S8_DST_BLEND_FACTOR_SHIFT);
}

static Bool i830_check_composite_texture(PicturePtr pPict, int unit)
{
    int w = pPict->pDrawable->width;
    int h = pPict->pDrawable->height;
    int i;

    if ((w > 2048) || (h > 2048))
        I830FALLBACK("Picture w/h too large (%dx%d)\n", w, h);

    for (i = 0; i < sizeof(i830_tex_formats) / sizeof(i830_tex_formats[0]);
	 i++)
    {
        if (i830_tex_formats[i].fmt == pPict->format)
            break;
    }
    if (i == sizeof(i830_tex_formats) / sizeof(i830_tex_formats[0]))
        I830FALLBACK("Unsupported picture format 0x%x\n",
		     (int)pPict->format);

    if (pPict->repeat && pPict->repeatType != RepeatNormal)
	I830FALLBACK("unsupport repeat type\n");

    if (pPict->filter != PictFilterNearest &&
        pPict->filter != PictFilterBilinear)
    {
        I830FALLBACK("Unsupported filter 0x%x\n", pPict->filter);
    }

    return TRUE;
}

static uint32_t
i8xx_get_card_format(PicturePtr pPict)
{
    int i;
    for (i = 0; i < sizeof(i830_tex_formats) / sizeof(i830_tex_formats[0]);
	    i++)
    {
	if (i830_tex_formats[i].fmt == pPict->format)
	    break;
    }
    return i830_tex_formats[i].card_fmt;
}

static Bool
i830_texture_setup(PicturePtr pPict, PixmapPtr pPix, int unit)
{

    ScrnInfoPtr pScrn = xf86Screens[pPict->pDrawable->pScreen->myNum];
    I830Ptr pI830 = I830PTR(pScrn);
    uint32_t format, offset, pitch, filter;
    uint32_t wrap_mode = TEXCOORDMODE_CLAMP_BORDER;

    offset = intel_get_pixmap_offset(pPix);
    pitch = intel_get_pixmap_pitch(pPix);
    pI830->scale_units[unit][0] = pPix->drawable.width;
    pI830->scale_units[unit][1] = pPix->drawable.height;
    pI830->transform[unit] = pPict->transform;

    format = i8xx_get_card_format(pPict);

    if (pPict->repeat)
	wrap_mode = TEXCOORDMODE_WRAP;

    switch (pPict->filter) {
    case PictFilterNearest:
        filter = ((FILTER_NEAREST<<TM0S3_MAG_FILTER_SHIFT) |
		  (FILTER_NEAREST<<TM0S3_MIN_FILTER_SHIFT));
        break;
    case PictFilterBilinear:
        filter = ((FILTER_LINEAR<<TM0S3_MAG_FILTER_SHIFT) |
		  (FILTER_LINEAR<<TM0S3_MIN_FILTER_SHIFT));
        break;
    default:
	filter = 0;
        I830FALLBACK("Bad filter 0x%x\n", pPict->filter);
    }
    filter |= (MIPFILTER_NONE << TM0S3_MIP_FILTER_SHIFT); 

    {
	if (pPix->drawable.bitsPerPixel == 8)
	    format |= MAPSURF_8BIT;
	else if (pPix->drawable.bitsPerPixel == 16)
	    format |= MAPSURF_16BIT;
	else
	    format |= MAPSURF_32BIT;

	BEGIN_BATCH(10);
	OUT_BATCH(_3DSTATE_LOAD_STATE_IMMEDIATE_2 | LOAD_TEXTURE_MAP(unit) | 4);
	OUT_BATCH((offset & TM0S0_ADDRESS_MASK) | TM0S0_USE_FENCE);
	OUT_BATCH(((pPix->drawable.height - 1) << TM0S1_HEIGHT_SHIFT) |
		  ((pPix->drawable.width - 1) << TM0S1_WIDTH_SHIFT) | format);
	OUT_BATCH((pitch/4 - 1) << TM0S2_PITCH_SHIFT | TM0S2_MAP_2D);
	OUT_BATCH(filter);
	OUT_BATCH(0); /* default color */
	OUT_BATCH(_3DSTATE_MAP_COORD_SET_CMD | TEXCOORD_SET(unit) |
		  ENABLE_TEXCOORD_PARAMS | TEXCOORDS_ARE_NORMAL |
		  TEXCOORDTYPE_CARTESIAN | ENABLE_ADDR_V_CNTL |
		  TEXCOORD_ADDR_V_MODE(wrap_mode) |
		  ENABLE_ADDR_U_CNTL | TEXCOORD_ADDR_U_MODE(wrap_mode));
	/* map texel stream */
	OUT_BATCH(_3DSTATE_MAP_COORD_SETBIND_CMD);
	if (unit == 0)
	    OUT_BATCH(TEXBIND_SET0(TEXCOORDSRC_VTXSET_0) |
		      TEXBIND_SET1(TEXCOORDSRC_KEEP) |
		      TEXBIND_SET2(TEXCOORDSRC_KEEP) |
		      TEXBIND_SET3(TEXCOORDSRC_KEEP));
	else
	    OUT_BATCH(TEXBIND_SET0(TEXCOORDSRC_VTXSET_0) |
		      TEXBIND_SET1(TEXCOORDSRC_VTXSET_1) |
		      TEXBIND_SET2(TEXCOORDSRC_KEEP) |
		      TEXBIND_SET3(TEXCOORDSRC_KEEP));
	OUT_BATCH(_3DSTATE_MAP_TEX_STREAM_CMD | (unit << 16) |
		  DISABLE_TEX_STREAM_BUMP |
		  ENABLE_TEX_STREAM_COORD_SET |
		  TEX_STREAM_COORD_SET(unit) |
		  ENABLE_TEX_STREAM_MAP_IDX |
		  TEX_STREAM_MAP_IDX(unit));
	ADVANCE_BATCH();
     }

#ifdef I830DEBUG
    ErrorF("try to sync to show any errors...");
    I830Sync(pScrn);
#endif

    return TRUE;
}

Bool
i830_check_composite(int op, PicturePtr pSrcPicture, PicturePtr pMaskPicture,
		     PicturePtr pDstPicture)
{
    uint32_t tmp1;

    /* Check for unsupported compositing operations. */
    if (op >= sizeof(i830_blend_op) / sizeof(i830_blend_op[0]))
        I830FALLBACK("Unsupported Composite op 0x%x\n", op);

    if (pMaskPicture != NULL && pMaskPicture->componentAlpha &&
	    PICT_FORMAT_RGB(pMaskPicture->format)) {
        /* Check if it's component alpha that relies on a source alpha and on
         * the source value.  We can only get one of those into the single
         * source value that we get to blend with.
         */
        if (i830_blend_op[op].src_alpha &&
            (i830_blend_op[op].src_blend != BLENDFACTOR_ZERO))
            	I830FALLBACK("Component alpha not supported with source "
			     "alpha and source value blending.\n");
    }

    if (!i830_check_composite_texture(pSrcPicture, 0))
        I830FALLBACK("Check Src picture texture\n");
    if (pMaskPicture != NULL && !i830_check_composite_texture(pMaskPicture, 1))
        I830FALLBACK("Check Mask picture texture\n");

    if (!i830_get_dest_format(pDstPicture, &tmp1))
	I830FALLBACK("Get Color buffer format\n");

    return TRUE;
}

Bool
i830_prepare_composite(int op, PicturePtr pSrcPicture,
		       PicturePtr pMaskPicture, PicturePtr pDstPicture,
		       PixmapPtr pSrc, PixmapPtr pMask, PixmapPtr pDst)
{
    ScrnInfoPtr pScrn = xf86Screens[pSrcPicture->pDrawable->pScreen->myNum];
    I830Ptr pI830 = I830PTR(pScrn);
    uint32_t dst_format, dst_offset, dst_pitch;
    Bool is_affine_src, is_affine_mask;
    Bool is_nearest = FALSE;

    i830_exa_check_pitch_3d(pSrc);
    if (pMask)
	i830_exa_check_pitch_3d(pMask);
    i830_exa_check_pitch_3d(pDst);

    IntelEmitInvarientState(pScrn);
    *pI830->last_3d = LAST_3D_RENDER;

    if (!i830_get_dest_format(pDstPicture, &dst_format))
	return FALSE;
    dst_offset = intel_get_pixmap_offset(pDst);
    dst_pitch = intel_get_pixmap_pitch(pDst);

    if (!i830_texture_setup(pSrcPicture, pSrc, 0))
	I830FALLBACK("fail to setup src texture\n");
    if (pSrcPicture->filter == PictFilterNearest)
	is_nearest = TRUE;
    if (pMask != NULL) {
	if (!i830_texture_setup(pMaskPicture, pMask, 1))
	    I830FALLBACK("fail to setup mask texture\n");
	if (pMaskPicture->filter == PictFilterNearest)
	    is_nearest = TRUE;
    } else {
	pI830->transform[1] = NULL;
	pI830->scale_units[1][0] = -1;
	pI830->scale_units[1][1] = -1;
    }

    is_affine_src = i830_transform_is_affine (pI830->transform[0]);
    is_affine_mask = i830_transform_is_affine (pI830->transform[1]);

    if (is_nearest)
	pI830->coord_adjust = -0.125;
    else
	pI830->coord_adjust = 0;

    if (!is_affine_src || !is_affine_mask)
	I830FALLBACK("non-affine transform unsupported on 8xx hardware\n");

    {
	uint32_t cblend, ablend, blendctl, vf2;

	BEGIN_BATCH(30);

	/* color buffer */
	OUT_BATCH(_3DSTATE_BUF_INFO_CMD);
	OUT_BATCH(BUF_3D_ID_COLOR_BACK| BUF_3D_USE_FENCE |
		  BUF_3D_PITCH(dst_pitch));
	OUT_BATCH(BUF_3D_ADDR(dst_offset));
	OUT_BATCH(MI_NOOP);

	OUT_BATCH(_3DSTATE_DST_BUF_VARS_CMD);
	OUT_BATCH(dst_format);

	/* defaults */
	OUT_BATCH(_3DSTATE_DFLT_Z_CMD);
	OUT_BATCH(0);

	OUT_BATCH(_3DSTATE_DFLT_DIFFUSE_CMD);
	OUT_BATCH(0);

	OUT_BATCH(_3DSTATE_DFLT_SPEC_CMD);
	OUT_BATCH(0);

	OUT_BATCH(_3DSTATE_DRAW_RECT_CMD);
	OUT_BATCH(0);
	OUT_BATCH(0); /* ymin, xmin */
	OUT_BATCH(DRAW_YMAX(pDst->drawable.height - 1) |
		  DRAW_XMAX(pDst->drawable.width - 1));
	OUT_BATCH(0); /* yorig, xorig */

	OUT_BATCH(_3DSTATE_LOAD_STATE_IMMEDIATE_1 | I1_LOAD_S(2) |
		  I1_LOAD_S(3) | 1);
	if (pMask)
	    vf2 = 2 << 12; /* 2 texture coord sets */
	else
	    vf2 = 1 << 12;
	OUT_BATCH(vf2); /* TEXCOORDFMT_2D */
	OUT_BATCH(S3_CULLMODE_NONE | S3_VERTEXHAS_XY);

	/* If component alpha is active in the mask and the blend operation
	 * uses the source alpha, then we know we don't need the source
	 * value (otherwise we would have hit a fallback earlier), so we
	 * provide the source alpha (src.A * mask.X) as output color.
	 * Conversely, if CA is set and we don't need the source alpha, then
	 * we produce the source value (src.X * mask.X) and the source alpha
	 * is unused..  Otherwise, we provide the non-CA source value
	 * (src.X * mask.A).
	 *
	 * The PICT_FORMAT_RGB(pict) == 0 fixups are not needed on 855+'s a8
	 * pictures, but we need to implement it for 830/845 and there's no
	 * harm done in leaving it in.
	 */
	cblend = TB0C_LAST_STAGE | TB0C_RESULT_SCALE_1X | TB0C_OP_MODULE |
		 TB0C_OUTPUT_WRITE_CURRENT;
	ablend = TB0A_RESULT_SCALE_1X | TB0A_OP_MODULE |
		 TB0A_OUTPUT_WRITE_CURRENT;

	/* Get the source picture's channels into TBx_ARG1 */
	if (pMaskPicture != NULL &&
	    pMaskPicture->componentAlpha &&
	    PICT_FORMAT_RGB(pMaskPicture->format) &&
	    i830_blend_op[op].src_alpha)
	{
	    /* Producing source alpha value, so the first set of channels
	     * is src.A instead of src.X
	     */
	    if (PICT_FORMAT_A(pSrcPicture->format) != 0) {
		ablend |= TB0A_ARG1_SEL_TEXEL0;
		cblend |= TB0C_ARG1_SEL_TEXEL0 | TB0C_ARG1_REPLICATE_ALPHA;
	    } else {
		ablend |= TB0A_ARG1_SEL_ONE;
		cblend |= TB0C_ARG1_SEL_ONE;
	    }
	} else {
	    if (PICT_FORMAT_A(pSrcPicture->format) != 0) {
		ablend |= TB0A_ARG1_SEL_TEXEL0;
	    } else {
		ablend |= TB0A_ARG1_SEL_ONE;
	    }
	    if (PICT_FORMAT_RGB(pSrcPicture->format) != 0)
		cblend |= TB0C_ARG1_SEL_TEXEL0;
	    else
		cblend |= TB0C_ARG1_SEL_ONE | TB0C_ARG1_INVERT; /* 0.0 */
	}

	if (pMask) {
	    if (pMaskPicture->componentAlpha &&
		PICT_FORMAT_RGB(pMaskPicture->format))
	    {
		cblend |= TB0C_ARG2_SEL_TEXEL1;
	    } else {
		if (PICT_FORMAT_A(pMaskPicture->format) != 0)
		    cblend |= TB0C_ARG2_SEL_TEXEL1 |
			TB0C_ARG2_REPLICATE_ALPHA;
		else
		    cblend |= TB0C_ARG2_SEL_ONE;
	    }
	    if (PICT_FORMAT_A(pMaskPicture->format) != 0)
		ablend |= TB0A_ARG2_SEL_TEXEL1;
	    else
		ablend |= TB0A_ARG2_SEL_ONE;
	} else {
	    cblend |= TB0C_ARG2_SEL_ONE;
	    ablend |= TB0A_ARG2_SEL_ONE;
	}

	OUT_BATCH(_3DSTATE_LOAD_STATE_IMMEDIATE_2 |
		  LOAD_TEXTURE_BLEND_STAGE(0)|1);
	OUT_BATCH(cblend);
	OUT_BATCH(ablend);
	OUT_BATCH(0);

	blendctl = i830_get_blend_cntl(op, pMaskPicture, pDstPicture->format);
	OUT_BATCH(_3DSTATE_INDPT_ALPHA_BLEND_CMD | DISABLE_INDPT_ALPHA_BLEND);
	OUT_BATCH(MI_NOOP);
	OUT_BATCH(_3DSTATE_LOAD_STATE_IMMEDIATE_1 | I1_LOAD_S(8) | 0);
	OUT_BATCH(S8_ENABLE_COLOR_BLEND | S8_BLENDFUNC_ADD | blendctl |
		  S8_ENABLE_COLOR_BUFFER_WRITE);

	OUT_BATCH(_3DSTATE_ENABLES_1_CMD | DISABLE_LOGIC_OP |
		  DISABLE_STENCIL_TEST | DISABLE_DEPTH_BIAS |
		  DISABLE_SPEC_ADD | DISABLE_FOG | DISABLE_ALPHA_TEST |
		  ENABLE_COLOR_BLEND | DISABLE_DEPTH_TEST);
	/* We have to explicitly say we don't want write disabled */
	OUT_BATCH(_3DSTATE_ENABLES_2_CMD | ENABLE_COLOR_MASK |
		  DISABLE_STENCIL_WRITE | ENABLE_TEX_CACHE |
		  DISABLE_DITHER | ENABLE_COLOR_WRITE |
		  DISABLE_DEPTH_WRITE);
	ADVANCE_BATCH();
    }

#ifdef I830DEBUG
    Error("try to sync to show any errors...");
    I830Sync(pScrn);
#endif

    return TRUE;
}

/**
 * Do a single rectangle composite operation.
 *
 * This function is shared between i830 and i915 generation code.
 */
void
i830_composite(PixmapPtr pDst, int srcX, int srcY, int maskX, int maskY,
	       int dstX, int dstY, int w, int h)
{
    ScrnInfoPtr pScrn = xf86Screens[pDst->drawable.pScreen->myNum];
    I830Ptr pI830 = I830PTR(pScrn);
    Bool has_mask;
    Bool is_affine_src, is_affine_mask;
    int per_vertex, num_floats;
    float src_x[3], src_y[3], src_w[3], mask_x[3], mask_y[3], mask_w[3];

    is_affine_src = i830_transform_is_affine (pI830->transform[0]);
    is_affine_mask = i830_transform_is_affine (pI830->transform[1]);

    if (pI830->scale_units[1][0] == -1 || pI830->scale_units[1][1] == -1) {
	has_mask = FALSE;
    } else {
	has_mask = TRUE;
    }

    per_vertex = 2; /* dest x/y */
    if (is_affine_src)
    {
	if (!i830_get_transformed_coordinates(srcX, srcY,
					      pI830->transform[0],
					      &src_x[0], &src_y[0]))
	    return;
	if (!i830_get_transformed_coordinates(srcX, srcY + h,
					      pI830->transform[0],
					      &src_x[1], &src_y[1]))
	    return;
	if (!i830_get_transformed_coordinates(srcX + w, srcY + h,
					      pI830->transform[0],
					      &src_x[2], &src_y[2]))
	    return;
	per_vertex += 2;    /* src x/y */
    } else {
	if (!i830_get_transformed_coordinates_3d(srcX, srcY,
						 pI830->transform[0],
						 &src_x[0], &src_y[0],
						 &src_w[0]))
	    return;
	if (!i830_get_transformed_coordinates_3d(srcX, srcY + h,
						 pI830->transform[0],
						 &src_x[1], &src_y[1],
						 &src_w[1]))
	    return;
	if (!i830_get_transformed_coordinates_3d(srcX + w, srcY + h,
						 pI830->transform[0],
						 &src_x[2], &src_y[2],
						 &src_w[2]))
	    return;
	per_vertex += 4;    /* src x/y/z/w */
    }
    if (has_mask) {
	if (is_affine_mask) {
	    if (!i830_get_transformed_coordinates(maskX, maskY,
						  pI830->transform[1],
						  &mask_x[0], &mask_y[0]))
		return;
	    if (!i830_get_transformed_coordinates(maskX, maskY + h,
						  pI830->transform[1],
						  &mask_x[1], &mask_y[1]))
		return;
	    if (!i830_get_transformed_coordinates(maskX + w, maskY + h,
						  pI830->transform[1],
						  &mask_x[2], &mask_y[2]))
		return;
	    per_vertex += 2;	/* mask x/y */
	} else {
	    if (!i830_get_transformed_coordinates_3d(maskX, maskY,
						     pI830->transform[1],
						     &mask_x[0], &mask_y[0],
						     &mask_w[0]))
		return;
	    if (!i830_get_transformed_coordinates_3d(maskX, maskY + h,
						     pI830->transform[1],
						     &mask_x[1], &mask_y[1],
						     &mask_w[1]))
		return;
	    if (!i830_get_transformed_coordinates_3d(maskX + w, maskY + h,
						     pI830->transform[1],
						     &mask_x[2], &mask_y[2],
						     &mask_w[2]))
		return;
	    per_vertex += 4;	/* mask x/y/z/w */
	}
    }

    num_floats = 3 * per_vertex;
    BEGIN_BATCH(6 + num_floats);

    OUT_BATCH(MI_NOOP);
    OUT_BATCH(MI_NOOP);
    OUT_BATCH(MI_NOOP);
    OUT_BATCH(MI_NOOP);
    OUT_BATCH(MI_NOOP);

    OUT_BATCH(PRIM3D_INLINE | PRIM3D_RECTLIST | (num_floats-1));
    OUT_BATCH_F(pI830->coord_adjust + dstX + w);
    OUT_BATCH_F(pI830->coord_adjust + dstY + h);
    OUT_BATCH_F(src_x[2] / pI830->scale_units[0][0]);
    OUT_BATCH_F(src_y[2] / pI830->scale_units[0][1]);
    if (!is_affine_src) {
	OUT_BATCH_F(0.0);
	OUT_BATCH_F(src_w[2]);
    }
    if (has_mask) {
	OUT_BATCH_F(mask_x[2] / pI830->scale_units[1][0]);
	OUT_BATCH_F(mask_y[2] / pI830->scale_units[1][1]);
	if (!is_affine_mask) {
	    OUT_BATCH_F(0.0);
	    OUT_BATCH_F(mask_w[2]);
	}
    }

    OUT_BATCH_F(pI830->coord_adjust + dstX);
    OUT_BATCH_F(pI830->coord_adjust + dstY + h);
    OUT_BATCH_F(src_x[1] / pI830->scale_units[0][0]);
    OUT_BATCH_F(src_y[1] / pI830->scale_units[0][1]);
    if (!is_affine_src) {
	OUT_BATCH_F(0.0);
	OUT_BATCH_F(src_w[1]);
    }
    if (has_mask) {
	OUT_BATCH_F(mask_x[1] / pI830->scale_units[1][0]);
	OUT_BATCH_F(mask_y[1] / pI830->scale_units[1][1]);
	if (!is_affine_mask) {
	    OUT_BATCH_F(0.0);
	    OUT_BATCH_F(mask_w[1]);
	}
    }

    OUT_BATCH_F(pI830->coord_adjust + dstX);
    OUT_BATCH_F(pI830->coord_adjust + dstY);
    OUT_BATCH_F(src_x[0] / pI830->scale_units[0][0]);
    OUT_BATCH_F(src_y[0] / pI830->scale_units[0][1]);
    if (!is_affine_src) {
	OUT_BATCH_F(0.0);
	OUT_BATCH_F(src_w[0]);
    }
    if (has_mask) {
	OUT_BATCH_F(mask_x[0] / pI830->scale_units[1][0]);
	OUT_BATCH_F(mask_y[0] / pI830->scale_units[1][1]);
	if (!is_affine_mask) {
	    OUT_BATCH_F(0.0);
	    OUT_BATCH_F(mask_w[0]);
	}
    }

    ADVANCE_BATCH();
}

/**
 * Do any cleanup from the Composite operation.
 *
 * This is shared between i830 through i965.
 */
void
i830_done_composite(PixmapPtr pDst)
{
    /* NO-OP */
}