fbpict.c

超强的嵌入式GUI系统

				func = fbCompositeTrans_0888xnx0888;
			    break;
#ifdef USE_MMX
			case PICT_x8r8g8b8:
			case PICT_x8b8g8r8:
			    if (pDst->format_code == pSrc->format_code &&
				pMask->format_code == PICT_a8 && fbHaveMMX())
				func = fbCompositeSrc_x888x8x8888mmx;
			    break;
#if 0 /* This case fails rendercheck for me */
			case PICT_a8r8g8b8:
			    if ((pDst->format == PICT_a8r8g8b8 ||
				 pDst->format == PICT_x8r8g8b8) &&
				pMask->format == PICT_a8 && fbHaveMMX())
				func = fbCompositeSrc_8888x8x8888mmx;
			    break;
#endif
			case PICT_a8b8g8r8:
			    if ((pDst->format_code == PICT_a8b8g8r8 ||
				 pDst->format_code == PICT_x8b8g8r8) &&
				pMask->format_code == PICT_a8 && fbHaveMMX())
				func = fbCompositeSrc_8888x8x8888mmx;
			    break;
#endif
			}

                        if (func != pixman_compositeGeneral)
			    maskRepeat = FALSE;
		    }
		}
	    }
	}
	else /* no mask */
	{
	    if (srcRepeat &&
		pSrc->pDrawable->width == 1 &&
		pSrc->pDrawable->height == 1)
	    {
		/* no mask and repeating source */
		switch (pSrc->format_code) {
		case PICT_a8r8g8b8:
		    switch (pDst->format_code) {
		    case PICT_a8r8g8b8:
		    case PICT_x8r8g8b8:
#ifdef USE_MMX
			if (fbHaveMMX())
			{
			    srcRepeat = FALSE;
			    func = fbCompositeSolid_nx8888mmx;
			}
#endif
			break;
		    case PICT_r5g6b5:
#ifdef USE_MMX
			if (fbHaveMMX())
			{
			    srcRepeat = FALSE;
			    func = fbCompositeSolid_nx0565mmx;
			}
#endif
			break;
		    }
		    break;
		}
	    }
	    else
	    {
		/*
		 * Formats without alpha bits are just Copy with Over
		 */
		if (pSrc->format_code == pDst->format_code && !PICT_FORMAT_A(pSrc->format_code))
		{
#ifdef USE_MMX
			if (fbHaveMMX() &&
			    (pSrc->format_code == PICT_x8r8g8b8 || pSrc->format_code == PICT_x8b8g8r8))
			    func = fbCompositeCopyAreammx;
			else
#endif
			    func = fbCompositeSrcSrc_nxn;
		}
		else switch (pSrc->format_code) {
		case PICT_a8r8g8b8:
		    switch (pDst->format_code) {
		    case PICT_a8r8g8b8:
		    case PICT_x8r8g8b8:
#ifdef USE_MMX
			if (fbHaveMMX())
			    func = fbCompositeSrc_8888x8888mmx;
			else
#endif
			    func = fbCompositeSrc_8888x8888;
			break;
		    case PICT_r8g8b8:
			func = fbCompositeSrc_8888x0888;
			break;
		    case PICT_r5g6b5:
#ifdef USE_MMX
			if (fbHaveMMX())
			    func = fbCompositeSrc_8888x0565mmx;
			else
#endif
			    func = fbCompositeSrc_8888x0565;
			break;
		    }
		    break;
		case PICT_a8b8g8r8:
		    switch (pDst->format_code) {
		    case PICT_a8b8g8r8:
		    case PICT_x8b8g8r8:
#ifdef USE_MMX
			if (fbHaveMMX())
			    func = fbCompositeSrc_8888x8888mmx;
			else
#endif
			    func = fbCompositeSrc_8888x8888;
			break;
		    case PICT_b8g8r8:
			func = fbCompositeSrc_8888x0888;
			break;
		    case PICT_b5g6r5:
#ifdef USE_MMX
			if (fbHaveMMX())
			    func = fbCompositeSrc_8888x0565mmx;
			else
#endif
			    func = fbCompositeSrc_8888x0565;
			break;
		    }
		    break;
		}
	    }
	}
	break;
    case PIXMAN_OPERATOR_ADD:
	if (pMask == 0)
	{
	    switch (pSrc->format_code) {
	    case PICT_a8r8g8b8:
		switch (pDst->format_code) {
		case PICT_a8r8g8b8:
#ifdef USE_MMX
		    if (fbHaveMMX())
			func = fbCompositeSrcAdd_8888x8888mmx;
		    else
#endif
			func = fbCompositeSrcAdd_8888x8888;
		    break;
		}
		break;
	    case PICT_a8b8g8r8:
		switch (pDst->format_code) {
		case PICT_a8b8g8r8:
#ifdef USE_MMX
		    if (fbHaveMMX())
			func = fbCompositeSrcAdd_8888x8888mmx;
		    else
#endif
			func = fbCompositeSrcAdd_8888x8888;
		    break;
		}
		break;
	    case PICT_a8:
		switch (pDst->format_code) {
		case PICT_a8:
#ifdef USE_MMX
		    if (fbHaveMMX())
			func = fbCompositeSrcAdd_8000x8000mmx;
		    else
#endif
			func = fbCompositeSrcAdd_8000x8000;
		    break;
		}
		break;
	    case PICT_a1:
		switch (pDst->format_code) {
		case PICT_a1:
		    func = fbCompositeSrcAdd_1000x1000;
		    break;
		}
		break;
	    }
	}
	else
	{
	    if ((pSrc->format_code == PICT_a8r8g8b8	||
		 pSrc->format_code == PICT_a8b8g8r8) &&
		srcRepeat			     &&
		pMask->format_code == PICT_a8	     &&
		pDst->format_code == PICT_a8)
	    {
#ifdef USE_MMX
		if (fbHaveMMX())
		{
		    srcRepeat = FALSE;

		    func = fbCompositeSrcAdd_8888x8x8mmx;
		}
		else
#endif
		    func = fbCompositeSrcAdd_8888x8x8;
	    }
	}
	break;
    case PIXMAN_OPERATOR_SRC:
	if (pMask)
	  {
#ifdef USE_MMX
	    if (srcRepeat &&
		pSrc->pDrawable->width == 1 &&
		pSrc->pDrawable->height == 1)
	    {
		if (pMask->format_code == PICT_a8)
		{
		    switch (pDst->format_code) {
		    case PICT_a8r8g8b8:
		    case PICT_x8r8g8b8:
		    case PICT_a8b8g8r8:
		    case PICT_x8b8g8r8:
			if (fbHaveMMX())
			    func = fbCompositeSolidMaskSrc_nx8x8888mmx;
			break;
		    }
		}
	    }
#endif
	  }
	else
	{
	    if (pSrc->format_code == pDst->format_code)
	    {
#ifdef USE_MMX
		if (pSrc->pDrawable != pDst->pDrawable &&
                    (PICT_FORMAT_BPP (pSrc->format_code) == 16 ||
                     PICT_FORMAT_BPP (pSrc->format_code) == 32))
		    func = fbCompositeCopyAreammx;
		else
#endif
		    func = fbCompositeSrcSrc_nxn;
	    }
	}
	break;
    case PIXMAN_OPERATOR_IN:
#ifdef USE_MMX
	if (pSrc->format_code == PICT_a8 &&
	    pDst->format_code == PICT_a8 &&
	    !pMask)
	{
	    if (fbHaveMMX())
		func = fbCompositeIn_8x8mmx;
	}
	else if (srcRepeat && pMask && !pMask->componentAlpha &&
		 (pSrc->format_code == PICT_a8r8g8b8 ||
		  pSrc->format_code == PICT_a8b8g8r8)   &&
		 (pMask->format_code == PICT_a8)	&&
		 pDst->format_code == PICT_a8)
	{
	    if (fbHaveMMX())
	    {
		srcRepeat = FALSE;
		func = fbCompositeIn_nx8x8mmx;
	    }
	}
#else
	func = NULL;
#endif
	break;
    case PIXMAN_OPERATOR_CLEAR:
    case PIXMAN_OPERATOR_DST:
    case PIXMAN_OPERATOR_OVER_REVERSE:
    case PIXMAN_OPERATOR_IN_REVERSE:
    case PIXMAN_OPERATOR_OUT:
    case PIXMAN_OPERATOR_OUT_REVERSE:
    case PIXMAN_OPERATOR_ATOP:
    case PIXMAN_OPERATOR_ATOP_REVERSE:
    case PIXMAN_OPERATOR_XOR:
    case PIXMAN_OPERATOR_SATURATE:
    default:
	/* For any operator not specifically handled above we default out to the general code. */
	func = NULL;
    }

    if (!func) {
        /* no fast path, use the general code */
        pixman_compositeGeneral(op, pSrc, pMask, pDst, xSrc, ySrc, xMask, yMask, xDst, yDst, width, height);
        return;
    }

    /* if we are transforming, we handle repeats in IcFetch[a]_transform */
    if (srcTransform)
	srcRepeat = 0;
    if (maskTransform)
	maskRepeat = 0;

    region = pixman_region_create();
    pixman_region_union_rect (region, region, xDst, yDst, width, height);

    if (!FbComputeCompositeRegion (region,
				   pSrc,
				   pMask,
				   pDst,
				   xSrc,
				   ySrc,
				   xMask,
				   yMask,
				   xDst,
				   yDst,
				   width,
				   height))
	return;

    n = pixman_region_num_rects (region);
    pbox = pixman_region_rects (region);
    while (n--)
    {
	h = pbox->y2 - pbox->y1;
	y_src = pbox->y1 - yDst + ySrc;
	y_msk = pbox->y1 - yDst + yMask;
	y_dst = pbox->y1;
	while (h)
	{
	    h_this = h;
	    w = pbox->x2 - pbox->x1;
	    x_src = pbox->x1 - xDst + xSrc;
	    x_msk = pbox->x1 - xDst + xMask;
	    x_dst = pbox->x1;
	    if (maskRepeat)
	    {
		y_msk = mod (y_msk, pMask->pDrawable->height);
		if (h_this > pMask->pDrawable->height - y_msk)
		    h_this = pMask->pDrawable->height - y_msk;
	    }
	    if (srcRepeat)
	    {
		y_src = mod (y_src, pSrc->pDrawable->height);
		if (h_this > pSrc->pDrawable->height - y_src)
		    h_this = pSrc->pDrawable->height - y_src;
	    }
	    while (w)
	    {
		w_this = w;
		if (maskRepeat)
		{
		    x_msk = mod (x_msk, pMask->pDrawable->width);
		    if (w_this > pMask->pDrawable->width - x_msk)
			w_this = pMask->pDrawable->width - x_msk;
		}
		if (srcRepeat)
		{
		    x_src = mod (x_src, pSrc->pDrawable->width);
		    if (w_this > pSrc->pDrawable->width - x_src)
			w_this = pSrc->pDrawable->width - x_src;
		}
		(*func) (op, pSrc, pMask, pDst,
			 x_src, y_src, x_msk, y_msk, x_dst, y_dst,
			 w_this, h_this);
		w -= w_this;
		x_src += w_this;
		x_msk += w_this;
		x_dst += w_this;
	    }
	    h -= h_this;
	    y_src += h_this;
	    y_msk += h_this;
	    y_dst += h_this;
	}
	pbox++;
    }
    pixman_region_destroy (region);
}

/* The CPU detection code needs to be in a file not compiled with
 * "-mmmx -msse", as gcc would generate CMOV instructions otherwise
 * that would lead to SIGILL instructions on old CPUs that don't have
 * it.
 */
#if defined(USE_MMX) && !defined(__amd64__) && !defined(__x86_64__)

enum CPUFeatures {
    NoFeatures = 0,
    MMX = 0x1,
    MMX_Extensions = 0x2,
    SSE = 0x6,
    SSE2 = 0x8,
    CMOV = 0x10
};

static unsigned int detectCPUFeatures(void) {
    unsigned int result, features;
    char vendor[13];
#ifdef _MSC_VER
    int vendor0 = 0, vendor1, vendor2;
#endif
    vendor[0] = 0;
    vendor[12] = 0;

#ifdef __GNUC__
    /* see p. 118 of amd64 instruction set manual Vol3 */
    /* We need to be careful about the handling of %ebx and
     * %esp here. We can't declare either one as clobbered
     * since they are special registers (%ebx is the "PIC
     * register" holding an offset to global data, %esp the
     * stack pointer), so we need to make sure they have their
     * original values when we access the output operands.
     */
    __asm__ ("pushf\n"
             "pop %%eax\n"
             "mov %%eax, %%ecx\n"
             "xor $0x00200000, %%eax\n"
             "push %%eax\n"
             "popf\n"
             "pushf\n"
             "pop %%eax\n"
             "mov $0x0, %%edx\n"
             "xor %%ecx, %%eax\n"
             "jz 1f\n"

             "mov $0x00000000, %%eax\n"
	     "push %%ebx\n"
             "cpuid\n"
             "mov %%ebx, %%eax\n"
	     "pop %%ebx\n"
             "mov %%eax, %1\n"
             "mov %%edx, %2\n"
             "mov %%ecx, %3\n"
             "mov $0x00000001, %%eax\n"
	     "push %%ebx\n"
             "cpuid\n"
	     "pop %%ebx\n"
             "1:\n"
             "mov %%edx, %0\n"
             : "=r" (result),
               "=m" (vendor[0]),
               "=m" (vendor[4]),
               "=m" (vendor[8])
             :
             : "%eax", "%ecx", "%edx"
        );
#elif defined (_MSC_VER)
    _asm {
      pushfd
      pop eax
      mov ecx, eax
      xor eax, 00200000h
      push eax
      popfd
      pushfd
      pop eax
      mov edx, 0
      xor eax, ecx
      jz nocpuid

      mov eax, 0
      push ebx
      cpuid
      mov eax, ebx
      pop ebx
      mov vendor0, eax
      mov vendor1, edx
      mov vendor2, ecx
      mov eax, 1
      push ebx
      cpuid
      pop ebx
    nocpuid:
      mov result, edx
    }
    memmove (vendor+0, &vendor0, 4);
    memmove (vendor+4, &vendor1, 4);
    memmove (vendor+8, &vendor2, 4);
#else
#error unsupported compiler
#endif

    features = 0;
    if (result) {
        /* result now contains the standard feature bits */
        if (result & (1 << 15))
            features |= CMOV;
        if (result & (1 << 23))
            features |= MMX;
        if (result & (1 << 25))
            features |= SSE;
        if (result & (1 << 26))
            features |= SSE2;
        if ((features & MMX) && !(features & SSE) &&
            (strcmp(vendor, "AuthenticAMD") == 0 ||
             strcmp(vendor, "Geode by NSC") == 0)) {
            /* check for AMD MMX extensions */
#ifdef __GNUC__

            unsigned int result;
            __asm__("push %%ebx\n"
                    "mov $0x80000000, %%eax\n"
                    "cpuid\n"
                    "xor %%edx, %%edx\n"
                    "cmp $0x1, %%eax\n"
                    "jge 1f\n"
                    "mov $0x80000001, %%eax\n"
                    "cpuid\n"
                    "1:\n"
                    "pop %%ebx\n"
                    "mov %%edx, %0\n"
                    : "=r" (result)
                    :
                    : "%eax", "%ecx", "%edx"
                );
#endif
#ifdef _MSC_VER
	    _asm {
	      push ebx
	      mov eax, 80000000h
	      cpuid
	      xor edx, edx
	      cmp eax, 1
	      jge notamd
	      mov eax, 80000001h
	      cpuid
	    notamd:
	      pop ebx
	      mov result, edx
	    }
#endif
            if (result & (1<<22))
                features |= MMX_Extensions;
        }
    }
    return features;
}

Bool
fbHaveMMX (void)
{
    static Bool initialized = FALSE;
    static Bool mmx_present;

    if (!initialized)
    {
        unsigned int features = detectCPUFeatures();
	mmx_present = (features & (MMX|MMX_Extensions)) == (MMX|MMX_Extensions);
        initialized = TRUE;
    }

    return mmx_present;
}
#endif /* USE_MMX && !amd64 */
#endif /* RENDER */