Imported a fix from xserver/master which was part of a larger refactoring of fbComposite
code. This part fixes a logic error in SafeAlphaComposite where some return paths resulted in the server changing the color depth of a Drawable out from under the client. This caused random crashes in many cairo/pango/gtk apps. Props to Guy Harris for tracking this down in WireShark, but it will probably solve problems in other apps (Inkscape, Gimp?)
This commit is contained in:
parent
fd6a04e530
commit
1f945fcabe
117
fb/fbpict.c
117
fb/fbpict.c
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@ -37,19 +37,6 @@
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#include "fbpict.h"
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#include "fbmmx.h"
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typedef void (*CompositeFunc) (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height);
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CARD32
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fbOver (CARD32 x, CARD32 y)
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{
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@ -825,6 +812,110 @@ fbCompositeSolidMask_nx1xn (CARD8 op,
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# define mod(a,b) ((b) == 1 ? 0 : (a) >= 0 ? (a) % (b) : (b) - (-a) % (b))
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void
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fbWalkCompositeRegion (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height,
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Bool srcRepeat,
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Bool maskRepeat,
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CompositeFunc compositeRect)
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{
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RegionRec region;
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int n;
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BoxPtr pbox;
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int w, h, w_this, h_this;
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int x_msk, y_msk, x_src, y_src, x_dst, y_dst;
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xDst += pDst->pDrawable->x;
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yDst += pDst->pDrawable->y;
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if (pSrc->pDrawable)
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{
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xSrc += pSrc->pDrawable->x;
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ySrc += pSrc->pDrawable->y;
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}
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if (pMask && pMask->pDrawable)
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{
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xMask += pMask->pDrawable->x;
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yMask += pMask->pDrawable->y;
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}
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if (!miComputeCompositeRegion (®ion, pSrc, pMask, pDst, xSrc, ySrc,
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xMask, yMask, xDst, yDst, width, height))
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return;
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n = REGION_NUM_RECTS (®ion);
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pbox = REGION_RECTS (®ion);
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while (n--)
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{
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h = pbox->y2 - pbox->y1;
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y_src = pbox->y1 - yDst + ySrc;
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y_msk = pbox->y1 - yDst + yMask;
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y_dst = pbox->y1;
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while (h)
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{
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h_this = h;
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w = pbox->x2 - pbox->x1;
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x_src = pbox->x1 - xDst + xSrc;
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x_msk = pbox->x1 - xDst + xMask;
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x_dst = pbox->x1;
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if (maskRepeat)
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{
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y_msk = mod (y_msk - pMask->pDrawable->y, pMask->pDrawable->height);
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if (h_this > pMask->pDrawable->height - y_msk)
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h_this = pMask->pDrawable->height - y_msk;
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y_msk += pMask->pDrawable->y;
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}
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if (srcRepeat)
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{
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y_src = mod (y_src - pSrc->pDrawable->y, pSrc->pDrawable->height);
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if (h_this > pSrc->pDrawable->height - y_src)
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h_this = pSrc->pDrawable->height - y_src;
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y_src += pSrc->pDrawable->y;
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}
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while (w)
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{
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w_this = w;
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if (maskRepeat)
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{
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x_msk = mod (x_msk - pMask->pDrawable->x, pMask->pDrawable->width);
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if (w_this > pMask->pDrawable->width - x_msk)
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w_this = pMask->pDrawable->width - x_msk;
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x_msk += pMask->pDrawable->x;
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}
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if (srcRepeat)
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{
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x_src = mod (x_src - pSrc->pDrawable->x, pSrc->pDrawable->width);
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if (w_this > pSrc->pDrawable->width - x_src)
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w_this = pSrc->pDrawable->width - x_src;
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x_src += pSrc->pDrawable->x;
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}
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(*compositeRect) (op, pSrc, pMask, pDst,
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x_src, y_src, x_msk, y_msk, x_dst, y_dst,
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w_this, h_this);
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w -= w_this;
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x_src += w_this;
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x_msk += w_this;
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x_dst += w_this;
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}
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h -= h_this;
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y_src += h_this;
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y_msk += h_this;
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y_dst += h_this;
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}
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pbox++;
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}
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REGION_UNINIT (pDst->pDrawable->pScreen, ®ion);
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}
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void
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fbComposite (CARD8 op,
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PicturePtr pSrc,
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31
fb/fbpict.h
31
fb/fbpict.h
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@ -618,6 +618,37 @@ fbComposite (CARD8 op,
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CARD16 width,
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CARD16 height);
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typedef void (*CompositeFunc) (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height);
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void
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fbWalkCompositeRegion (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height,
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Bool srcRepeat,
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Bool maskRepeat,
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CompositeFunc compositeRect);
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/* fbtrap.c */
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void
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@ -48,21 +48,6 @@
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#include "rootlessCommon.h"
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# define mod(a,b) ((b) == 1 ? 0 : (a) >= 0 ? (a) % (b) : (b) - (-a) % (b))
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typedef void (*CompositeFunc) (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height);
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/* Optimized version of fbCompositeSolidMask_nx8x8888 */
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void
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SafeAlphaCompositeSolidMask_nx8x8888(
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}
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void
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SafeAlphaComposite (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height)
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SafeAlphaComposite (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pMask,
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PicturePtr pDst,
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INT16 xSrc,
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INT16 ySrc,
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INT16 xMask,
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INT16 yMask,
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INT16 xDst,
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INT16 yDst,
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CARD16 width,
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CARD16 height)
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{
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RegionRec region;
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int n;
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BoxPtr pbox;
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CompositeFunc func = 0;
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Bool srcRepeat = pSrc->repeat;
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Bool maskRepeat = FALSE;
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Bool srcAlphaMap = pSrc->alphaMap != 0;
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Bool maskAlphaMap = FALSE;
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Bool dstAlphaMap = pDst->alphaMap != 0;
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int x_msk, y_msk, x_src, y_src, x_dst, y_dst;
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int w, h, w_this, h_this;
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int dstDepth = pDst->pDrawable->depth;
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int oldFormat = pDst->format;
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if (!pSrc) {
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ErrorF("SafeAlphaComposite: pSrc must not be null!\n");
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return;
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}
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xDst += pDst->pDrawable->x;
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yDst += pDst->pDrawable->y;
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xSrc += pSrc->pDrawable->x;
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ySrc += pSrc->pDrawable->y;
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if (pMask)
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if (!pDst) {
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ErrorF("SafeAlphaComposite: pDst must not be null!\n");
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return;
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}
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int oldDepth = pDst->pDrawable->depth;
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int oldFormat = pDst->format;
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/*
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* We can use the more optimized fbpict code, but it sets bits above
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* the depth to zero. Temporarily adjust destination depth if needed.
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*/
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if (pDst->pDrawable->type == DRAWABLE_WINDOW
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&& pDst->pDrawable->depth == 24
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&& pDst->pDrawable->bitsPerPixel == 32)
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{
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xMask += pMask->pDrawable->x;
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yMask += pMask->pDrawable->y;
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maskRepeat = pMask->repeat;
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maskAlphaMap = pMask->alphaMap != 0;
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pDst->pDrawable->depth = 32;
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}
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/*
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* We can use the more optimized fbpict code, but it sets bits above
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* the depth to zero. Temporarily adjust destination depth if needed.
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*/
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if (pDst->pDrawable->type == DRAWABLE_WINDOW
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&& pDst->pDrawable->depth == 24
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&& pDst->pDrawable->bitsPerPixel == 32)
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/* For rootless preserve the alpha in x8r8g8b8 which really is
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* a8r8g8b8
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*/
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if (oldFormat == PICT_x8r8g8b8)
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{
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pDst->pDrawable->depth = 32;
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pDst->format = PICT_a8r8g8b8;
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}
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/* For rootless preserve the alpha in x8r8g8b8 which really is
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* a8r8g8b8
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*/
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if (oldFormat == PICT_x8r8g8b8)
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if (pSrc->pDrawable && pMask && pMask->pDrawable &&
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!pSrc->transform && !pMask->transform &&
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!pSrc->alphaMap && !pMask->alphaMap &&
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!pMask->repeat && !pMask->componentAlpha && !pDst->alphaMap &&
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pMask->format == PICT_a8 &&
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pSrc->repeatType == RepeatNormal &&
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pSrc->pDrawable->width == 1 &&
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pSrc->pDrawable->height == 1 &&
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(pDst->format == PICT_a8r8g8b8 ||
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pDst->format == PICT_x8r8g8b8 ||
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pDst->format == PICT_a8b8g8r8 ||
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pDst->format == PICT_x8b8g8r8))
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{
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pDst->format = PICT_a8r8g8b8;
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fbWalkCompositeRegion (op, pSrc, pMask, pDst,
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xSrc, ySrc, xMask, yMask, xDst, yDst,
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width, height,
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TRUE /* srcRepeat */,
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FALSE /* maskRepeat */,
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SafeAlphaCompositeSolidMask_nx8x8888);
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}
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if (!pSrc->transform && !(pMask && pMask->transform))
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if (!maskAlphaMap && !srcAlphaMap && !dstAlphaMap)
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switch (op) {
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case PictOpSrc:
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#ifdef USE_MMX
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if (!pMask && pSrc->format == pDst->format &&
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pSrc->pDrawable != pDst->pDrawable)
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{
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func = fbCompositeCopyAreammx;
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}
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#endif
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break;
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case PictOpOver:
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if (pMask)
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{
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if (srcRepeat &&
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pSrc->pDrawable->width == 1 &&
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pSrc->pDrawable->height == 1)
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{
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srcRepeat = FALSE;
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if (PICT_FORMAT_COLOR(pSrc->format)) {
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switch (pMask->format) {
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case PICT_a8:
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switch (pDst->format) {
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case PICT_r5g6b5:
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case PICT_b5g6r5:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSolidMask_nx8x0565mmx;
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else
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#endif
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func = fbCompositeSolidMask_nx8x0565;
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break;
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case PICT_r8g8b8:
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case PICT_b8g8r8:
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func = fbCompositeSolidMask_nx8x0888;
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break;
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case PICT_a8r8g8b8:
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case PICT_x8r8g8b8:
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case PICT_a8b8g8r8:
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case PICT_x8b8g8r8:
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func = SafeAlphaCompositeSolidMask_nx8x8888;
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break;
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}
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break;
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case PICT_a8r8g8b8:
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if (pMask->componentAlpha) {
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switch (pDst->format) {
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case PICT_a8r8g8b8:
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case PICT_x8r8g8b8:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSolidMask_nx8888x8888Cmmx;
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else
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#endif
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func = fbCompositeSolidMask_nx8888x8888C;
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break;
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case PICT_r5g6b5:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSolidMask_nx8888x0565Cmmx;
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else
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#endif
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func = fbCompositeSolidMask_nx8888x0565C;
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break;
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}
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}
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break;
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case PICT_a8b8g8r8:
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if (pMask->componentAlpha) {
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switch (pDst->format) {
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case PICT_a8b8g8r8:
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case PICT_x8b8g8r8:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSolidMask_nx8888x8888Cmmx;
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else
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#endif
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func = fbCompositeSolidMask_nx8888x8888C;
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break;
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case PICT_b5g6r5:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSolidMask_nx8888x0565Cmmx;
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else
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#endif
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func = fbCompositeSolidMask_nx8888x0565C;
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break;
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}
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}
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break;
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case PICT_a1:
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switch (pDst->format) {
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case PICT_r5g6b5:
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case PICT_b5g6r5:
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case PICT_r8g8b8:
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case PICT_b8g8r8:
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case PICT_a8r8g8b8:
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case PICT_x8r8g8b8:
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case PICT_a8b8g8r8:
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case PICT_x8b8g8r8:
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func = fbCompositeSolidMask_nx1xn;
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break;
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}
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break;
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}
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}
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}
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else /* has mask and non-repeating source */
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{
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if (pSrc->pDrawable == pMask->pDrawable &&
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xSrc == xMask && ySrc == yMask &&
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!pMask->componentAlpha)
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{
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/* source == mask: non-premultiplied data */
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switch (pSrc->format) {
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case PICT_x8b8g8r8:
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switch (pMask->format) {
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case PICT_a8r8g8b8:
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case PICT_a8b8g8r8:
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switch (pDst->format) {
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case PICT_a8r8g8b8:
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case PICT_x8r8g8b8:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSrc_8888RevNPx8888mmx;
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#endif
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break;
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case PICT_r5g6b5:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSrc_8888RevNPx0565mmx;
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#endif
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break;
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}
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break;
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}
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break;
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case PICT_x8r8g8b8:
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switch (pMask->format) {
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case PICT_a8r8g8b8:
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case PICT_a8b8g8r8:
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switch (pDst->format) {
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case PICT_a8b8g8r8:
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case PICT_x8b8g8r8:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSrc_8888RevNPx8888mmx;
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#endif
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break;
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case PICT_r5g6b5:
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#ifdef USE_MMX
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if (fbHaveMMX())
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func = fbCompositeSrc_8888RevNPx0565mmx;
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#endif
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break;
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}
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break;
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}
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break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* non-repeating source, repeating mask => translucent window */
|
||||
if (maskRepeat &&
|
||||
pMask->pDrawable->width == 1 &&
|
||||
pMask->pDrawable->height == 1)
|
||||
{
|
||||
if (pSrc->format == PICT_x8r8g8b8 &&
|
||||
pDst->format == PICT_x8r8g8b8 &&
|
||||
pMask->format == PICT_a8)
|
||||
{
|
||||
#ifdef USE_MMX
|
||||
if (fbHaveMMX())
|
||||
func = fbCompositeSrc_8888x8x8888mmx;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
else /* no mask */
|
||||
{
|
||||
if (srcRepeat &&
|
||||
pSrc->pDrawable->width == 1 &&
|
||||
pSrc->pDrawable->height == 1)
|
||||
{
|
||||
/* no mask and repeating source */
|
||||
switch (pSrc->format) {
|
||||
case PICT_a8r8g8b8:
|
||||
switch (pDst->format) {
|
||||
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
|
||||
{
|
||||
switch (pSrc->format) {
|
||||
case PICT_a8r8g8b8:
|
||||
switch (pDst->format) {
|
||||
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:
|
||||
func = fbCompositeSrc_8888x0565;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case PICT_x8r8g8b8:
|
||||
switch (pDst->format) {
|
||||
case PICT_a8r8g8b8:
|
||||
case PICT_x8r8g8b8:
|
||||
#ifdef USE_MMX
|
||||
if (fbHaveMMX())
|
||||
func = fbCompositeCopyAreammx;
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
case PICT_x8b8g8r8:
|
||||
switch (pDst->format) {
|
||||
case PICT_a8b8g8r8:
|
||||
case PICT_x8b8g8r8:
|
||||
#ifdef USE_MMX
|
||||
if (fbHaveMMX())
|
||||
func = fbCompositeCopyAreammx;
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case PICT_a8b8g8r8:
|
||||
switch (pDst->format) {
|
||||
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:
|
||||
func = fbCompositeSrc_8888x0565;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case PICT_r5g6b5:
|
||||
switch (pDst->format) {
|
||||
case PICT_r5g6b5:
|
||||
func = fbCompositeSrc_0565x0565;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case PICT_b5g6r5:
|
||||
switch (pDst->format) {
|
||||
case PICT_b5g6r5:
|
||||
func = fbCompositeSrc_0565x0565;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
case PictOpAdd:
|
||||
if (pMask == 0)
|
||||
{
|
||||
switch (pSrc->format) {
|
||||
case PICT_a8r8g8b8:
|
||||
switch (pDst->format) {
|
||||
case PICT_a8r8g8b8:
|
||||
#ifdef USE_MMX
|
||||
if (fbHaveMMX())
|
||||
func = fbCompositeSrcAdd_8888x8888mmx;
|
||||
else
|
||||
#endif
|
||||
func = fbCompositeSrcAdd_8888x8888;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case PICT_a8b8g8r8:
|
||||
switch (pDst->format) {
|
||||
case PICT_a8b8g8r8:
|
||||
#ifdef USE_MMX
|
||||
if (fbHaveMMX())
|
||||
func = fbCompositeSrcAdd_8888x8888mmx;
|
||||
else
|
||||
#endif
|
||||
func = fbCompositeSrcAdd_8888x8888;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case PICT_a8:
|
||||
switch (pDst->format) {
|
||||
case PICT_a8:
|
||||
#ifdef USE_MMX
|
||||
if (fbHaveMMX())
|
||||
func = fbCompositeSrcAdd_8000x8000mmx;
|
||||
else
|
||||
#endif
|
||||
func = fbCompositeSrcAdd_8000x8000;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case PICT_a1:
|
||||
switch (pDst->format) {
|
||||
case PICT_a1:
|
||||
func = fbCompositeSrcAdd_1000x1000;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (!func) {
|
||||
/* no fast path, use the general code */
|
||||
fbCompositeGeneral(op, pSrc, pMask, pDst, xSrc, ySrc, xMask, yMask, xDst, yDst, width, height);
|
||||
// Reset destination depth and format to their true value
|
||||
pDst->pDrawable->depth = dstDepth;
|
||||
pDst->format = oldFormat;
|
||||
return;
|
||||
}
|
||||
|
||||
if (!miComputeCompositeRegion (®ion,
|
||||
pSrc,
|
||||
pMask,
|
||||
pDst,
|
||||
xSrc,
|
||||
ySrc,
|
||||
xMask,
|
||||
yMask,
|
||||
xDst,
|
||||
yDst,
|
||||
width,
|
||||
height))
|
||||
return;
|
||||
|
||||
n = REGION_NUM_RECTS (®ion);
|
||||
pbox = REGION_RECTS (®ion);
|
||||
while (n--)
|
||||
else
|
||||
{
|
||||
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++;
|
||||
fbComposite (op, pSrc, pMask, pDst,
|
||||
xSrc, ySrc, xMask, yMask, xDst, yDst, width, height);
|
||||
}
|
||||
REGION_UNINIT (pDst->pDrawable->pScreen, ®ion);
|
||||
|
||||
// Reset destination depth/format to its true value
|
||||
pDst->pDrawable->depth = dstDepth;
|
||||
pDst->format = oldFormat;
|
||||
pDst->pDrawable->depth = oldDepth;
|
||||
pDst->format = oldFormat;
|
||||
}
|
||||
|
||||
#endif /* RENDER */
|
||||
|
|
Loading…
Reference in New Issue
Block a user