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xserver/exa/exa_render.c

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/*
* Copyright © 2001 Keith Packard
*
* Partly based on code that is Copyright © The XFree86 Project Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <stdlib.h>
#include "exa_priv.h"
#include "mipict.h"
#if DEBUG_TRACE_FALL
static void
exaCompositeFallbackPictDesc(PicturePtr pict, char *string, int n)
{
char format[20];
char size[20];
char loc;
int temp;
if (!pict) {
snprintf(string, n, "None");
return;
}
switch (pict->format) {
case PICT_a8r8g8b8:
snprintf(format, 20, "ARGB8888");
break;
case PICT_x8r8g8b8:
snprintf(format, 20, "XRGB8888");
break;
case PICT_b8g8r8a8:
snprintf(format, 20, "BGRA8888");
break;
case PICT_b8g8r8x8:
snprintf(format, 20, "BGRX8888");
break;
case PICT_r5g6b5:
snprintf(format, 20, "RGB565 ");
break;
case PICT_x1r5g5b5:
snprintf(format, 20, "RGB555 ");
break;
case PICT_a8:
snprintf(format, 20, "A8 ");
break;
case PICT_a1:
snprintf(format, 20, "A1 ");
break;
default:
snprintf(format, 20, "0x%x", (int) pict->format);
break;
}
if (pict->pDrawable) {
loc = exaGetOffscreenPixmap(pict->pDrawable, &temp, &temp) ? 's' : 'm';
snprintf(size, 20, "%dx%d%s", pict->pDrawable->width,
pict->pDrawable->height, pict->repeat ? " R" : "");
}
else {
loc = '-';
snprintf(size, 20, "%s", pict->repeat ? " R" : "");
}
snprintf(string, n, "%p:%c fmt %s (%s)", pict->pDrawable, loc, format,
size);
}
static void
exaPrintCompositeFallback(CARD8 op,
PicturePtr pSrc, PicturePtr pMask, PicturePtr pDst)
{
char sop[20];
char srcdesc[40], maskdesc[40], dstdesc[40];
switch (op) {
case PictOpSrc:
snprintf(sop, sizeof(sop), "Src");
break;
case PictOpOver:
snprintf(sop, sizeof(sop), "Over");
break;
default:
snprintf(sop, sizeof(sop), "0x%x", (int) op);
break;
}
exaCompositeFallbackPictDesc(pSrc, srcdesc, 40);
exaCompositeFallbackPictDesc(pMask, maskdesc, 40);
exaCompositeFallbackPictDesc(pDst, dstdesc, 40);
ErrorF("Composite fallback: op %s, \n"
" src %s, \n"
" mask %s, \n"
" dst %s, \n", sop, srcdesc, maskdesc, dstdesc);
}
#endif /* DEBUG_TRACE_FALL */
Bool
exaOpReadsDestination(CARD8 op)
{
/* FALSE (does not read destination) is the list of ops in the protocol
* document with "0" in the "Fb" column and no "Ab" in the "Fa" column.
* That's just Clear and Src. ReduceCompositeOp() will already have
* converted con/disjoint clear/src to Clear or Src.
*/
switch (op) {
case PictOpClear:
case PictOpSrc:
return FALSE;
default:
return TRUE;
}
}
static Bool
exaGetPixelFromRGBA(CARD32 *pixel,
CARD16 red,
CARD16 green,
CARD16 blue, CARD16 alpha, PictFormatPtr pFormat)
{
int rbits, bbits, gbits, abits;
int rshift, bshift, gshift, ashift;
*pixel = 0;
if (!PICT_FORMAT_COLOR(pFormat->format) &&
PICT_FORMAT_TYPE(pFormat->format) != PICT_TYPE_A)
return FALSE;
rbits = PICT_FORMAT_R(pFormat->format);
gbits = PICT_FORMAT_G(pFormat->format);
bbits = PICT_FORMAT_B(pFormat->format);
abits = PICT_FORMAT_A(pFormat->format);
rshift = pFormat->direct.red;
gshift = pFormat->direct.green;
bshift = pFormat->direct.blue;
ashift = pFormat->direct.alpha;
*pixel |= (blue >> (16 - bbits)) << bshift;
*pixel |= (red >> (16 - rbits)) << rshift;
*pixel |= (green >> (16 - gbits)) << gshift;
*pixel |= (alpha >> (16 - abits)) << ashift;
return TRUE;
}
static Bool
exaGetRGBAFromPixel(CARD32 pixel,
CARD16 *red,
CARD16 *green,
CARD16 *blue,
CARD16 *alpha,
PictFormatPtr pFormat, PictFormatShort format)
{
int rbits, bbits, gbits, abits;
int rshift, bshift, gshift, ashift;
if (!PICT_FORMAT_COLOR(format) && PICT_FORMAT_TYPE(format) != PICT_TYPE_A)
return FALSE;
rbits = PICT_FORMAT_R(format);
gbits = PICT_FORMAT_G(format);
bbits = PICT_FORMAT_B(format);
abits = PICT_FORMAT_A(format);
if (pFormat) {
rshift = pFormat->direct.red;
gshift = pFormat->direct.green;
bshift = pFormat->direct.blue;
ashift = pFormat->direct.alpha;
}
else if (format == PICT_a8r8g8b8) {
rshift = 16;
gshift = 8;
bshift = 0;
ashift = 24;
}
else
FatalError("EXA bug: exaGetRGBAFromPixel() doesn't match "
"createSourcePicture()\n");
if (rbits) {
*red = ((pixel >> rshift) & ((1 << rbits) - 1)) << (16 - rbits);
while (rbits < 16) {
*red |= *red >> rbits;
rbits <<= 1;
}
*green = ((pixel >> gshift) & ((1 << gbits) - 1)) << (16 - gbits);
while (gbits < 16) {
*green |= *green >> gbits;
gbits <<= 1;
}
*blue = ((pixel >> bshift) & ((1 << bbits) - 1)) << (16 - bbits);
while (bbits < 16) {
*blue |= *blue >> bbits;
bbits <<= 1;
}
}
else {
*red = 0x0000;
*green = 0x0000;
*blue = 0x0000;
}
if (abits) {
*alpha = ((pixel >> ashift) & ((1 << abits) - 1)) << (16 - abits);
while (abits < 16) {
*alpha |= *alpha >> abits;
abits <<= 1;
}
}
else
*alpha = 0xffff;
return TRUE;
}
static int
exaTryDriverSolidFill(PicturePtr pSrc,
PicturePtr pDst,
INT16 xSrc,
INT16 ySrc,
INT16 xDst, INT16 yDst, CARD16 width, CARD16 height)
{
ExaScreenPriv(pDst->pDrawable->pScreen);
RegionRec region;
BoxPtr pbox;
int nbox;
int dst_off_x, dst_off_y;
PixmapPtr pSrcPix, pDstPix;
ExaPixmapPrivPtr pDstExaPix;
CARD32 pixel;
CARD16 red, green, blue, alpha;
pDstPix = exaGetDrawablePixmap(pDst->pDrawable);
pDstExaPix = ExaGetPixmapPriv(pDstPix);
/* Check whether the accelerator can use the destination pixmap.
*/
if (pDstExaPix->accel_blocked) {
return -1;
}
xDst += pDst->pDrawable->x;
yDst += pDst->pDrawable->y;
if (pSrc->pDrawable) {
xSrc += pSrc->pDrawable->x;
ySrc += pSrc->pDrawable->y;
}
if (!miComputeCompositeRegion(&region, pSrc, NULL, pDst,
xSrc, ySrc, 0, 0, xDst, yDst, width, height))
return 1;
exaGetDrawableDeltas(pDst->pDrawable, pDstPix, &dst_off_x, &dst_off_y);
RegionTranslate(&region, dst_off_x, dst_off_y);
if (pSrc->pDrawable) {
pSrcPix = exaGetDrawablePixmap(pSrc->pDrawable);
pixel = exaGetPixmapFirstPixel(pSrcPix);
}
else
miRenderColorToPixel(PictureMatchFormat(pDst->pDrawable->pScreen, 32,
pSrc->format),
&pSrc->pSourcePict->solidFill.fullcolor,
&pixel);
if (!exaGetRGBAFromPixel(pixel, &red, &green, &blue, &alpha,
pSrc->pFormat, pSrc->format) ||
!exaGetPixelFromRGBA(&pixel, red, green, blue, alpha, pDst->pFormat)) {
RegionUninit(&region);
return -1;
}
if (pExaScr->do_migration) {
ExaMigrationRec pixmaps[1];
pixmaps[0].as_dst = TRUE;
pixmaps[0].as_src = FALSE;
pixmaps[0].pPix = pDstPix;
pixmaps[0].pReg = &region;
exaDoMigration(pixmaps, 1, TRUE);
}
if (!exaPixmapHasGpuCopy(pDstPix)) {
RegionUninit(&region);
return 0;
}
if (!(*pExaScr->info->PrepareSolid) (pDstPix, GXcopy, 0xffffffff, pixel)) {
RegionUninit(&region);
return -1;
}
nbox = RegionNumRects(&region);
pbox = RegionRects(&region);
while (nbox--) {
(*pExaScr->info->Solid) (pDstPix, pbox->x1, pbox->y1, pbox->x2,
pbox->y2);
pbox++;
}
(*pExaScr->info->DoneSolid) (pDstPix);
exaMarkSync(pDst->pDrawable->pScreen);
RegionUninit(&region);
return 1;
}
static int
exaTryDriverCompositeRects(CARD8 op,
PicturePtr pSrc,
PicturePtr pMask,
PicturePtr pDst,
int nrect, ExaCompositeRectPtr rects)
{
ExaScreenPriv(pDst->pDrawable->pScreen);
int src_off_x = 0, src_off_y = 0, mask_off_x = 0, mask_off_y = 0;
int dst_off_x, dst_off_y;
PixmapPtr pSrcPix = NULL, pMaskPix = NULL, pDstPix;
ExaPixmapPrivPtr pSrcExaPix = NULL, pMaskExaPix = NULL, pDstExaPix;
if (!pExaScr->info->PrepareComposite)
return -1;
if (pSrc->pDrawable) {
pSrcPix = exaGetDrawablePixmap(pSrc->pDrawable);
pSrcExaPix = ExaGetPixmapPriv(pSrcPix);
}
if (pMask && pMask->pDrawable) {
pMaskPix = exaGetDrawablePixmap(pMask->pDrawable);
pMaskExaPix = ExaGetPixmapPriv(pMaskPix);
}
pDstPix = exaGetDrawablePixmap(pDst->pDrawable);
pDstExaPix = ExaGetPixmapPriv(pDstPix);
/* Check whether the accelerator can use these pixmaps.
* FIXME: If it cannot, use temporary pixmaps so that the drawing
* happens within limits.
*/
if (pDstExaPix->accel_blocked ||
(pSrcExaPix && pSrcExaPix->accel_blocked) ||
(pMaskExaPix && pMaskExaPix->accel_blocked)) {
return -1;
}
if (pExaScr->info->CheckComposite &&
!(*pExaScr->info->CheckComposite) (op, pSrc, pMask, pDst)) {
return -1;
}
if (pExaScr->do_migration) {
ExaMigrationRec pixmaps[3];
int i = 0;
pixmaps[i].as_dst = TRUE;
pixmaps[i].as_src = exaOpReadsDestination(op);
pixmaps[i].pPix = pDstPix;
pixmaps[i].pReg = NULL;
i++;
if (pSrcPix) {
pixmaps[i].as_dst = FALSE;
pixmaps[i].as_src = TRUE;
pixmaps[i].pPix = pSrcPix;
pixmaps[i].pReg = NULL;
i++;
}
if (pMaskPix) {
pixmaps[i].as_dst = FALSE;
pixmaps[i].as_src = TRUE;
pixmaps[i].pPix = pMaskPix;
pixmaps[i].pReg = NULL;
i++;
}
exaDoMigration(pixmaps, i, TRUE);
}
pDstPix = exaGetOffscreenPixmap(pDst->pDrawable, &dst_off_x, &dst_off_y);
if (!pDstPix)
return 0;
if (pSrcPix) {
pSrcPix =
exaGetOffscreenPixmap(pSrc->pDrawable, &src_off_x, &src_off_y);
if (!pSrcPix)
return 0;
}
if (pMaskPix) {
pMaskPix =
exaGetOffscreenPixmap(pMask->pDrawable, &mask_off_x, &mask_off_y);
if (!pMaskPix)
return 0;
}
if (!(*pExaScr->info->PrepareComposite) (op, pSrc, pMask, pDst, pSrcPix,
pMaskPix, pDstPix))
return -1;
while (nrect--) {
INT16 xDst = rects->xDst + pDst->pDrawable->x;
INT16 yDst = rects->yDst + pDst->pDrawable->y;
INT16 xMask = rects->xMask;
INT16 yMask = rects->yMask;
INT16 xSrc = rects->xSrc;
INT16 ySrc = rects->ySrc;
RegionRec region;
BoxPtr pbox;
int nbox;
if (pMaskPix) {
xMask += pMask->pDrawable->x;
yMask += pMask->pDrawable->y;
}
if (pSrcPix) {
xSrc += pSrc->pDrawable->x;
ySrc += pSrc->pDrawable->y;
}
if (!miComputeCompositeRegion(&region, pSrc, pMask, pDst,
xSrc, ySrc, xMask, yMask, xDst, yDst,
rects->width, rects->height))
goto next_rect;
RegionTranslate(&region, dst_off_x, dst_off_y);
nbox = RegionNumRects(&region);
pbox = RegionRects(&region);
xMask = xMask + mask_off_x - xDst - dst_off_x;
yMask = yMask + mask_off_y - yDst - dst_off_y;
xSrc = xSrc + src_off_x - xDst - dst_off_x;
ySrc = ySrc + src_off_y - yDst - dst_off_y;
while (nbox--) {
(*pExaScr->info->Composite) (pDstPix,
pbox->x1 + xSrc,
pbox->y1 + ySrc,
pbox->x1 + xMask,
pbox->y1 + yMask,
pbox->x1,
pbox->y1,
pbox->x2 - pbox->x1,
pbox->y2 - pbox->y1);
pbox++;
}
next_rect:
RegionUninit(&region);
rects++;
}
(*pExaScr->info->DoneComposite) (pDstPix);
exaMarkSync(pDst->pDrawable->pScreen);
return 1;
}
/**
* Copy a number of rectangles from source to destination in a single
* operation. This is specialized for glyph rendering: we don't have the
* special-case fallbacks found in exaComposite() - if the driver can support
* it, we use the driver functionality, otherwise we fall back straight to
* software.
*/
void
exaCompositeRects(CARD8 op,
PicturePtr pSrc,
PicturePtr pMask,
PicturePtr pDst, int nrect, ExaCompositeRectPtr rects)
{
ExaScreenPriv(pDst->pDrawable->pScreen);
int n;
ExaCompositeRectPtr r;
int ret;
/* If we get a mask, that means we're rendering to the exaGlyphs
* destination directly, so the damage layer takes care of this.
*/
if (!pMask) {
RegionRec region;
int x1 = MAXSHORT;
int y1 = MAXSHORT;
int x2 = MINSHORT;
int y2 = MINSHORT;
BoxRec box;
/* We have to manage the damage ourselves, since CompositeRects isn't
* something in the screen that can be managed by the damage extension,
* and EXA depends on damage to track what needs to be migrated between
* the gpu and the cpu.
*/
/* Compute the overall extents of the composited region - we're making
* the assumption here that we are compositing a bunch of glyphs that
* cluster closely together and damaging each glyph individually would
* be a loss compared to damaging the bounding box.
*/
n = nrect;
r = rects;
while (n--) {
int rect_x2 = r->xDst + r->width;
int rect_y2 = r->yDst + r->height;
if (r->xDst < x1)
x1 = r->xDst;
if (r->yDst < y1)
y1 = r->yDst;
if (rect_x2 > x2)
x2 = rect_x2;
if (rect_y2 > y2)
y2 = rect_y2;
r++;
}
if (x2 <= x1 || y2 <= y1)
return;
box.x1 = x1;
box.x2 = x2 < MAXSHORT ? x2 : MAXSHORT;
box.y1 = y1;
box.y2 = y2 < MAXSHORT ? y2 : MAXSHORT;
/* The pixmap migration code relies on pendingDamage indicating
* the bounds of the current rendering, so we need to force
* the actual damage into that region before we do anything, and
* (see use of DamagePendingRegion in exaCopyDirty)
*/
RegionInit(&region, &box, 1);
DamageRegionAppend(pDst->pDrawable, &region);
RegionUninit(&region);
}
/************************************************************/
ValidatePicture(pSrc);
if (pMask)
ValidatePicture(pMask);
ValidatePicture(pDst);
ret = exaTryDriverCompositeRects(op, pSrc, pMask, pDst, nrect, rects);
if (ret != 1) {
if (ret == -1 && op == PictOpOver && pMask && pMask->componentAlpha &&
(!pExaScr->info->CheckComposite ||
((*pExaScr->info->CheckComposite) (PictOpOutReverse, pSrc, pMask,
pDst) &&
(*pExaScr->info->CheckComposite) (PictOpAdd, pSrc, pMask,
pDst)))) {
ret =
exaTryDriverCompositeRects(PictOpOutReverse, pSrc, pMask, pDst,
nrect, rects);
if (ret == 1) {
op = PictOpAdd;
ret = exaTryDriverCompositeRects(op, pSrc, pMask, pDst, nrect,
rects);
}
}
if (ret != 1) {
n = nrect;
r = rects;
while (n--) {
ExaCheckComposite(op, pSrc, pMask, pDst,
r->xSrc, r->ySrc,
r->xMask, r->yMask,
r->xDst, r->yDst, r->width, r->height);
r++;
}
}
}
/************************************************************/
if (!pMask) {
/* Now we have to flush the damage out from pendingDamage => damage
* Calling DamageRegionProcessPending has that effect.
*/
DamageRegionProcessPending(pDst->pDrawable);
}
}
static int
exaTryDriverComposite(CARD8 op,
PicturePtr pSrc,
PicturePtr pMask,
PicturePtr pDst,
INT16 xSrc,
INT16 ySrc,
INT16 xMask,
INT16 yMask,
INT16 xDst, INT16 yDst, CARD16 width, CARD16 height)
{
ExaScreenPriv(pDst->pDrawable->pScreen);
RegionRec region;
BoxPtr pbox;
int nbox;
int src_off_x, src_off_y, mask_off_x = 0, mask_off_y = 0, dst_off_x, dst_off_y;
PixmapPtr pSrcPix = NULL, pMaskPix = NULL, pDstPix;
ExaPixmapPrivPtr pSrcExaPix = NULL, pMaskExaPix = NULL, pDstExaPix;
if (pSrc->pDrawable) {
pSrcPix = exaGetDrawablePixmap(pSrc->pDrawable);
pSrcExaPix = ExaGetPixmapPriv(pSrcPix);
}
pDstPix = exaGetDrawablePixmap(pDst->pDrawable);
pDstExaPix = ExaGetPixmapPriv(pDstPix);
if (pMask && pMask->pDrawable) {
pMaskPix = exaGetDrawablePixmap(pMask->pDrawable);
pMaskExaPix = ExaGetPixmapPriv(pMaskPix);
}
/* Check whether the accelerator can use these pixmaps.
* FIXME: If it cannot, use temporary pixmaps so that the drawing
* happens within limits.
*/
if (pDstExaPix->accel_blocked ||
(pSrcExaPix && pSrcExaPix->accel_blocked) ||
(pMaskExaPix && (pMaskExaPix->accel_blocked))) {
return -1;
}
xDst += pDst->pDrawable->x;
yDst += pDst->pDrawable->y;
if (pMaskPix) {
xMask += pMask->pDrawable->x;
yMask += pMask->pDrawable->y;
}
if (pSrcPix) {
xSrc += pSrc->pDrawable->x;
ySrc += pSrc->pDrawable->y;
}
if (pExaScr->info->CheckComposite &&
!(*pExaScr->info->CheckComposite) (op, pSrc, pMask, pDst)) {
return -1;
}
if (!miComputeCompositeRegion(&region, pSrc, pMask, pDst,
xSrc, ySrc, xMask, yMask, xDst, yDst,
width, height))
return 1;
exaGetDrawableDeltas(pDst->pDrawable, pDstPix, &dst_off_x, &dst_off_y);
RegionTranslate(&region, dst_off_x, dst_off_y);
if (pExaScr->do_migration) {
ExaMigrationRec pixmaps[3];
int i = 0;
pixmaps[i].as_dst = TRUE;
pixmaps[i].as_src = exaOpReadsDestination(op);
pixmaps[i].pPix = pDstPix;
pixmaps[i].pReg = pixmaps[0].as_src ? NULL : &region;
i++;
if (pSrcPix) {
pixmaps[i].as_dst = FALSE;
pixmaps[i].as_src = TRUE;
pixmaps[i].pPix = pSrcPix;
pixmaps[i].pReg = NULL;
i++;
}
if (pMaskPix) {
pixmaps[i].as_dst = FALSE;
pixmaps[i].as_src = TRUE;
pixmaps[i].pPix = pMaskPix;
pixmaps[i].pReg = NULL;
i++;
}
exaDoMigration(pixmaps, i, TRUE);
}
if (pSrcPix) {
pSrcPix =
exaGetOffscreenPixmap(pSrc->pDrawable, &src_off_x, &src_off_y);
if (!pSrcPix) {
RegionUninit(&region);
return 0;
}
}
if (pMaskPix) {
pMaskPix = exaGetOffscreenPixmap(pMask->pDrawable, &mask_off_x,
&mask_off_y);
if (!pMaskPix) {
RegionUninit(&region);
return 0;
}
}
if (!exaPixmapHasGpuCopy(pDstPix)) {
RegionUninit(&region);
return 0;
}
if (!(*pExaScr->info->PrepareComposite) (op, pSrc, pMask, pDst, pSrcPix,
pMaskPix, pDstPix)) {
RegionUninit(&region);
return -1;
}
nbox = RegionNumRects(&region);
pbox = RegionRects(&region);
xMask = xMask + mask_off_x - xDst - dst_off_x;
yMask = yMask + mask_off_y - yDst - dst_off_y;
xSrc = xSrc + src_off_x - xDst - dst_off_x;
ySrc = ySrc + src_off_y - yDst - dst_off_y;
while (nbox--) {
(*pExaScr->info->Composite) (pDstPix,
pbox->x1 + xSrc,
pbox->y1 + ySrc,
pbox->x1 + xMask,
pbox->y1 + yMask,
pbox->x1,
pbox->y1,
pbox->x2 - pbox->x1, pbox->y2 - pbox->y1);
pbox++;
}
(*pExaScr->info->DoneComposite) (pDstPix);
exaMarkSync(pDst->pDrawable->pScreen);
RegionUninit(&region);
return 1;
}
/**
* exaTryMagicTwoPassCompositeHelper implements PictOpOver using two passes of
* simpler operations PictOpOutReverse and PictOpAdd. Mainly used for component
* alpha and limited 1-tmu cards.
*
* From http://anholt.livejournal.com/32058.html:
*
* The trouble is that component-alpha rendering requires two different sources
* for blending: one for the source value to the blender, which is the
* per-channel multiplication of source and mask, and one for the source alpha
* for multiplying with the destination channels, which is the multiplication
* of the source channels by the mask alpha. So the equation for Over is:
*
* dst.A = src.A * mask.A + (1 - (src.A * mask.A)) * dst.A
* dst.R = src.R * mask.R + (1 - (src.A * mask.R)) * dst.R
* dst.G = src.G * mask.G + (1 - (src.A * mask.G)) * dst.G
* dst.B = src.B * mask.B + (1 - (src.A * mask.B)) * dst.B
*
* But we can do some simpler operations, right? How about PictOpOutReverse,
* which has a source factor of 0 and dest factor of (1 - source alpha). We
* can get the source alpha value (srca.X = src.A * mask.X) out of the texture
* blenders pretty easily. So we can do a component-alpha OutReverse, which
* gets us:
*
* dst.A = 0 + (1 - (src.A * mask.A)) * dst.A
* dst.R = 0 + (1 - (src.A * mask.R)) * dst.R
* dst.G = 0 + (1 - (src.A * mask.G)) * dst.G
* dst.B = 0 + (1 - (src.A * mask.B)) * dst.B
*
* OK. And if an op doesn't use the source alpha value for the destination
* factor, then we can do the channel multiplication in the texture blenders
* to get the source value, and ignore the source alpha that we wouldn't use.
* We've supported this in the Radeon driver for a long time. An example would
* be PictOpAdd, which does:
*
* dst.A = src.A * mask.A + dst.A
* dst.R = src.R * mask.R + dst.R
* dst.G = src.G * mask.G + dst.G
* dst.B = src.B * mask.B + dst.B
*
* Hey, this looks good! If we do a PictOpOutReverse and then a PictOpAdd right
* after it, we get:
*
* dst.A = src.A * mask.A + ((1 - (src.A * mask.A)) * dst.A)
* dst.R = src.R * mask.R + ((1 - (src.A * mask.R)) * dst.R)
* dst.G = src.G * mask.G + ((1 - (src.A * mask.G)) * dst.G)
* dst.B = src.B * mask.B + ((1 - (src.A * mask.B)) * dst.B)
*/
static int
exaTryMagicTwoPassCompositeHelper(CARD8 op,
PicturePtr pSrc,
PicturePtr pMask,
PicturePtr pDst,
INT16 xSrc,
INT16 ySrc,
INT16 xMask,
INT16 yMask,
INT16 xDst,
INT16 yDst, CARD16 width, CARD16 height)
{
ExaScreenPriv(pDst->pDrawable->pScreen);
assert(op == PictOpOver);
if (pExaScr->info->CheckComposite &&
(!(*pExaScr->info->CheckComposite) (PictOpOutReverse, pSrc, pMask,
pDst) ||
!(*pExaScr->info->CheckComposite) (PictOpAdd, pSrc, pMask, pDst))) {
return -1;
}
/* Now, we think we should be able to accelerate this operation. First,
* composite the destination to be the destination times the source alpha
* factors.
*/
exaComposite(PictOpOutReverse, pSrc, pMask, pDst, xSrc, ySrc, xMask, yMask,
xDst, yDst, width, height);
/* Then, add in the source value times the destination alpha factors (1.0).
*/
exaComposite(PictOpAdd, pSrc, pMask, pDst, xSrc, ySrc, xMask, yMask,
xDst, yDst, width, height);
return 1;
}
void
exaComposite(CARD8 op,
PicturePtr pSrc,
PicturePtr pMask,
PicturePtr pDst,
INT16 xSrc,
INT16 ySrc,
INT16 xMask,
INT16 yMask, INT16 xDst, INT16 yDst, CARD16 width, CARD16 height)
{
ExaScreenPriv(pDst->pDrawable->pScreen);
int ret = -1;
Bool saveSrcRepeat = pSrc->repeat;
Bool saveMaskRepeat = pMask ? pMask->repeat : 0;
RegionRec region;
if (pExaScr->swappedOut)
goto fallback;
/* Remove repeat in source if useless */
if (pSrc->pDrawable && pSrc->repeat && !pSrc->transform && xSrc >= 0 &&
(xSrc + width) <= pSrc->pDrawable->width && ySrc >= 0 &&
(ySrc + height) <= pSrc->pDrawable->height)
pSrc->repeat = 0;
if (!pMask && !pSrc->alphaMap && !pDst->alphaMap &&
(op == PictOpSrc || (op == PictOpOver && !PICT_FORMAT_A(pSrc->format))))
{
if (pSrc->pDrawable ?
(pSrc->pDrawable->width == 1 && pSrc->pDrawable->height == 1 &&
pSrc->repeat) :
(pSrc->pSourcePict->type == SourcePictTypeSolidFill)) {
ret = exaTryDriverSolidFill(pSrc, pDst, xSrc, ySrc, xDst, yDst,
width, height);
if (ret == 1)
goto done;
}
else if (pSrc->pDrawable && !pSrc->transform &&
((op == PictOpSrc &&
(pSrc->format == pDst->format ||
(PICT_FORMAT_COLOR(pDst->format) &&
PICT_FORMAT_COLOR(pSrc->format) &&
pDst->format == PICT_FORMAT(PICT_FORMAT_BPP(pSrc->format),
PICT_FORMAT_TYPE(pSrc->format),
0,
PICT_FORMAT_R(pSrc->format),
PICT_FORMAT_G(pSrc->format),
PICT_FORMAT_B(pSrc->format)))))
|| (op == PictOpOver && pSrc->format == pDst->format &&
!PICT_FORMAT_A(pSrc->format)))) {
if (!pSrc->repeat && xSrc >= 0 && ySrc >= 0 &&
(xSrc + width <= pSrc->pDrawable->width) &&
(ySrc + height <= pSrc->pDrawable->height)) {
Bool suc;
xDst += pDst->pDrawable->x;
yDst += pDst->pDrawable->y;
xSrc += pSrc->pDrawable->x;
ySrc += pSrc->pDrawable->y;
if (!miComputeCompositeRegion(&region, pSrc, pMask, pDst,
xSrc, ySrc, xMask, yMask, xDst,
yDst, width, height))
goto done;
suc = exaHWCopyNtoN(pSrc->pDrawable, pDst->pDrawable, NULL,
RegionRects(&region),
RegionNumRects(&region), xSrc - xDst,
ySrc - yDst, FALSE, FALSE);
RegionUninit(&region);
/* Reset values to their original values. */
xDst -= pDst->pDrawable->x;
yDst -= pDst->pDrawable->y;
xSrc -= pSrc->pDrawable->x;
ySrc -= pSrc->pDrawable->y;
if (!suc)
goto fallback;
goto done;
}
if (pSrc->repeat && pSrc->repeatType == RepeatNormal &&
pSrc->pDrawable->type == DRAWABLE_PIXMAP) {
DDXPointRec patOrg;
/* Let's see if the driver can do the repeat in one go */
if (pExaScr->info->PrepareComposite && !pSrc->alphaMap &&
!pDst->alphaMap) {
ret = exaTryDriverComposite(op, pSrc, pMask, pDst, xSrc,
ySrc, xMask, yMask, xDst, yDst,
width, height);
if (ret == 1)
goto done;
}
/* Now see if we can use exaFillRegionTiled() */
xDst += pDst->pDrawable->x;
yDst += pDst->pDrawable->y;
xSrc += pSrc->pDrawable->x;
ySrc += pSrc->pDrawable->y;
if (!miComputeCompositeRegion(&region, pSrc, pMask, pDst, xSrc,
ySrc, xMask, yMask, xDst, yDst,
width, height))
goto done;
/* pattern origin is the point in the destination drawable
* corresponding to (0,0) in the source */
patOrg.x = xDst - xSrc;
patOrg.y = yDst - ySrc;
ret = exaFillRegionTiled(pDst->pDrawable, &region,
(PixmapPtr) pSrc->pDrawable,
&patOrg, FB_ALLONES, GXcopy, CT_NONE);
RegionUninit(&region);
if (ret)
goto done;
/* Let's be correct and restore the variables to their original state. */
xDst -= pDst->pDrawable->x;
yDst -= pDst->pDrawable->y;
xSrc -= pSrc->pDrawable->x;
ySrc -= pSrc->pDrawable->y;
}
}
}
/* Remove repeat in mask if useless */
if (pMask && pMask->pDrawable && pMask->repeat && !pMask->transform &&
xMask >= 0 && (xMask + width) <= pMask->pDrawable->width &&
yMask >= 0 && (yMask + height) <= pMask->pDrawable->height)
pMask->repeat = 0;
if (pExaScr->info->PrepareComposite &&
!pSrc->alphaMap && (!pMask || !pMask->alphaMap) && !pDst->alphaMap) {
Bool isSrcSolid;
ret = exaTryDriverComposite(op, pSrc, pMask, pDst, xSrc, ySrc, xMask,
yMask, xDst, yDst, width, height);
if (ret == 1)
goto done;
/* For generic masks and solid src pictures, mach64 can do Over in two
* passes, similar to the component-alpha case.
*/
isSrcSolid = pSrc->pDrawable ?
(pSrc->pDrawable->width == 1 && pSrc->pDrawable->height == 1 &&
pSrc->repeat) :
(pSrc->pSourcePict->type == SourcePictTypeSolidFill);
/* If we couldn't do the Composite in a single pass, and it was a
* component-alpha Over, see if we can do it in two passes with
* an OutReverse and then an Add.
*/
if (ret == -1 && op == PictOpOver && pMask &&
(pMask->componentAlpha || isSrcSolid)) {
ret = exaTryMagicTwoPassCompositeHelper(op, pSrc, pMask, pDst,
xSrc, ySrc,
xMask, yMask, xDst, yDst,
width, height);
if (ret == 1)
goto done;
}
}
fallback:
#if DEBUG_TRACE_FALL
exaPrintCompositeFallback(op, pSrc, pMask, pDst);
#endif
ExaCheckComposite(op, pSrc, pMask, pDst, xSrc, ySrc,
xMask, yMask, xDst, yDst, width, height);
done:
pSrc->repeat = saveSrcRepeat;
if (pMask)
pMask->repeat = saveMaskRepeat;
}
/**
* Same as miCreateAlphaPicture, except it uses ExaCheckPolyFillRect instead
* of PolyFillRect to initialize the pixmap after creating it, to prevent
* the pixmap from being migrated.
*
* See the comments about exaTrapezoids and exaTriangles.
*/
static PicturePtr
exaCreateAlphaPicture(ScreenPtr pScreen,
PicturePtr pDst,
PictFormatPtr pPictFormat, CARD16 width, CARD16 height)
{
PixmapPtr pPixmap;
PicturePtr pPicture;
GCPtr pGC;
int error;
xRectangle rect;
if (width > 32767 || height > 32767)
return 0;
if (!pPictFormat) {
if (pDst->polyEdge == PolyEdgeSharp)
pPictFormat = PictureMatchFormat(pScreen, 1, PICT_a1);
else
pPictFormat = PictureMatchFormat(pScreen, 8, PICT_a8);
if (!pPictFormat)
return 0;
}
pPixmap = (*pScreen->CreatePixmap) (pScreen, width, height,
pPictFormat->depth, 0);
if (!pPixmap)
return 0;
pGC = GetScratchGC(pPixmap->drawable.depth, pScreen);
if (!pGC) {
(*pScreen->DestroyPixmap) (pPixmap);
return 0;
}
ValidateGC(&pPixmap->drawable, pGC);
rect.x = 0;
rect.y = 0;
rect.width = width;
rect.height = height;
ExaCheckPolyFillRect(&pPixmap->drawable, pGC, 1, &rect);
exaPixmapDirty(pPixmap, 0, 0, width, height);
FreeScratchGC(pGC);
pPicture = CreatePicture(0, &pPixmap->drawable, pPictFormat,
0, 0, serverClient, &error);
(*pScreen->DestroyPixmap) (pPixmap);
return pPicture;
}
/**
* exaTrapezoids is essentially a copy of miTrapezoids that uses
* exaCreateAlphaPicture instead of miCreateAlphaPicture.
*
* The problem with miCreateAlphaPicture is that it calls PolyFillRect
* to initialize the contents after creating the pixmap, which
* causes the pixmap to be moved in for acceleration. The subsequent
* call to RasterizeTrapezoid won't be accelerated however, which
* forces the pixmap to be moved out again.
*
* exaCreateAlphaPicture avoids this roundtrip by using ExaCheckPolyFillRect
* to initialize the contents.
*/
void
exaTrapezoids(CARD8 op, PicturePtr pSrc, PicturePtr pDst,
PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc,
int ntrap, xTrapezoid * traps)
{
ScreenPtr pScreen = pDst->pDrawable->pScreen;
PictureScreenPtr ps = GetPictureScreen(pScreen);
BoxRec bounds;
if (maskFormat) {
PicturePtr pPicture;
INT16 xDst, yDst;
INT16 xRel, yRel;
miTrapezoidBounds(ntrap, traps, &bounds);
if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
return;
xDst = traps[0].left.p1.x >> 16;
yDst = traps[0].left.p1.y >> 16;
pPicture = exaCreateAlphaPicture(pScreen, pDst, maskFormat,
bounds.x2 - bounds.x1,
bounds.y2 - bounds.y1);
if (!pPicture)
return;
exaPrepareAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
for (; ntrap; ntrap--, traps++)
if (xTrapezoidValid(traps))
(*ps->RasterizeTrapezoid) (pPicture, traps, -bounds.x1, -bounds.y1);
exaFinishAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
xRel = bounds.x1 + xSrc - xDst;
yRel = bounds.y1 + ySrc - yDst;
CompositePicture(op, pSrc, pPicture, pDst,
xRel, yRel, 0, 0, bounds.x1, bounds.y1,
bounds.x2 - bounds.x1, bounds.y2 - bounds.y1);
FreePicture(pPicture, 0);
}
else {
if (pDst->polyEdge == PolyEdgeSharp)
maskFormat = PictureMatchFormat(pScreen, 1, PICT_a1);
else
maskFormat = PictureMatchFormat(pScreen, 8, PICT_a8);
for (; ntrap; ntrap--, traps++)
exaTrapezoids(op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, traps);
}
}
/**
* exaTriangles is essentially a copy of miTriangles that uses
* exaCreateAlphaPicture instead of miCreateAlphaPicture.
*
* The problem with miCreateAlphaPicture is that it calls PolyFillRect
* to initialize the contents after creating the pixmap, which
* causes the pixmap to be moved in for acceleration. The subsequent
* call to AddTriangles won't be accelerated however, which forces the pixmap
* to be moved out again.
*
* exaCreateAlphaPicture avoids this roundtrip by using ExaCheckPolyFillRect
* to initialize the contents.
*/
void
exaTriangles(CARD8 op, PicturePtr pSrc, PicturePtr pDst,
PictFormatPtr maskFormat, INT16 xSrc, INT16 ySrc,
int ntri, xTriangle * tris)
{
ScreenPtr pScreen = pDst->pDrawable->pScreen;
PictureScreenPtr ps = GetPictureScreen(pScreen);
BoxRec bounds;
if (maskFormat) {
PicturePtr pPicture;
INT16 xDst, yDst;
INT16 xRel, yRel;
miTriangleBounds(ntri, tris, &bounds);
if (bounds.y1 >= bounds.y2 || bounds.x1 >= bounds.x2)
return;
xDst = tris[0].p1.x >> 16;
yDst = tris[0].p1.y >> 16;
pPicture = exaCreateAlphaPicture(pScreen, pDst, maskFormat,
bounds.x2 - bounds.x1,
bounds.y2 - bounds.y1);
if (!pPicture)
return;
exaPrepareAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
(*ps->AddTriangles) (pPicture, -bounds.x1, -bounds.y1, ntri, tris);
exaFinishAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
xRel = bounds.x1 + xSrc - xDst;
yRel = bounds.y1 + ySrc - yDst;
CompositePicture(op, pSrc, pPicture, pDst,
xRel, yRel, 0, 0, bounds.x1, bounds.y1,
bounds.x2 - bounds.x1, bounds.y2 - bounds.y1);
FreePicture(pPicture, 0);
}
else {
if (pDst->polyEdge == PolyEdgeSharp)
maskFormat = PictureMatchFormat(pScreen, 1, PICT_a1);
else
maskFormat = PictureMatchFormat(pScreen, 8, PICT_a8);
for (; ntri; ntri--, tris++)
exaTriangles(op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, tris);
}
}
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