diff options
Diffstat (limited to 'xorg-server/render/picture.c')
| -rw-r--r-- | xorg-server/render/picture.c | 1845 |
1 files changed, 1845 insertions, 0 deletions
diff --git a/xorg-server/render/picture.c b/xorg-server/render/picture.c new file mode 100644 index 000000000..b7874bb64 --- /dev/null +++ b/xorg-server/render/picture.c @@ -0,0 +1,1845 @@ +/* + * + * Copyright © 2000 SuSE, 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 SuSE not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. SuSE makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * SuSE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL SuSE + * 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. + * + * Author: Keith Packard, SuSE, Inc. + */ + +#ifdef HAVE_DIX_CONFIG_H +#include <dix-config.h> +#endif + +#include "misc.h" +#include "scrnintstr.h" +#include "os.h" +#include "regionstr.h" +#include "validate.h" +#include "windowstr.h" +#include "input.h" +#include "resource.h" +#include "colormapst.h" +#include "cursorstr.h" +#include "dixstruct.h" +#include "gcstruct.h" +#include "servermd.h" +#include "picturestr.h" +#include "xace.h" +#include "registry.h" + +_X_EXPORT DevPrivateKey PictureScreenPrivateKey = &PictureScreenPrivateKey; +DevPrivateKey PictureWindowPrivateKey = &PictureWindowPrivateKey; +static int PictureGeneration; +RESTYPE PictureType; +RESTYPE PictFormatType; +RESTYPE GlyphSetType; +int PictureCmapPolicy = PictureCmapPolicyDefault; + +Bool +PictureDestroyWindow (WindowPtr pWindow) +{ + ScreenPtr pScreen = pWindow->drawable.pScreen; + PicturePtr pPicture; + PictureScreenPtr ps = GetPictureScreen(pScreen); + Bool ret; + + while ((pPicture = GetPictureWindow(pWindow))) + { + SetPictureWindow(pWindow, pPicture->pNext); + if (pPicture->id) + FreeResource (pPicture->id, PictureType); + FreePicture ((pointer) pPicture, pPicture->id); + } + pScreen->DestroyWindow = ps->DestroyWindow; + ret = (*pScreen->DestroyWindow) (pWindow); + ps->DestroyWindow = pScreen->DestroyWindow; + pScreen->DestroyWindow = PictureDestroyWindow; + return ret; +} + +Bool +PictureCloseScreen (int index, ScreenPtr pScreen) +{ + PictureScreenPtr ps = GetPictureScreen(pScreen); + Bool ret; + int n; + + pScreen->CloseScreen = ps->CloseScreen; + ret = (*pScreen->CloseScreen) (index, pScreen); + PictureResetFilters (pScreen); + for (n = 0; n < ps->nformats; n++) + if (ps->formats[n].type == PictTypeIndexed) + (*ps->CloseIndexed) (pScreen, &ps->formats[n]); + GlyphUninit (pScreen); + SetPictureScreen(pScreen, 0); + xfree (ps->formats); + xfree (ps); + return ret; +} + +void +PictureStoreColors (ColormapPtr pColormap, int ndef, xColorItem *pdef) +{ + ScreenPtr pScreen = pColormap->pScreen; + PictureScreenPtr ps = GetPictureScreen(pScreen); + + pScreen->StoreColors = ps->StoreColors; + (*pScreen->StoreColors) (pColormap, ndef, pdef); + ps->StoreColors = pScreen->StoreColors; + pScreen->StoreColors = PictureStoreColors; + + if (pColormap->class == PseudoColor || pColormap->class == GrayScale) + { + PictFormatPtr format = ps->formats; + int nformats = ps->nformats; + + while (nformats--) + { + if (format->type == PictTypeIndexed && + format->index.pColormap == pColormap) + { + (*ps->UpdateIndexed) (pScreen, format, ndef, pdef); + break; + } + format++; + } + } +} + +static int +visualDepth (ScreenPtr pScreen, VisualPtr pVisual) +{ + int d, v; + DepthPtr pDepth; + + for (d = 0; d < pScreen->numDepths; d++) + { + pDepth = &pScreen->allowedDepths[d]; + for (v = 0; v < pDepth->numVids; v++) + if (pDepth->vids[v] == pVisual->vid) + return pDepth->depth; + } + return 0; +} + +typedef struct _formatInit { + CARD32 format; + CARD8 depth; +} FormatInitRec, *FormatInitPtr; + +static int +addFormat (FormatInitRec formats[256], + int nformat, + CARD32 format, + CARD8 depth) +{ + int n; + + for (n = 0; n < nformat; n++) + if (formats[n].format == format && formats[n].depth == depth) + return nformat; + formats[nformat].format = format; + formats[nformat].depth = depth; + return ++nformat; +} + +#define Mask(n) ((n) == 32 ? 0xffffffff : ((1 << (n))-1)) + +PictFormatPtr +PictureCreateDefaultFormats (ScreenPtr pScreen, int *nformatp) +{ + int nformats, f; + PictFormatPtr pFormats; + FormatInitRec formats[1024]; + CARD32 format; + CARD8 depth; + VisualPtr pVisual; + int v; + int bpp; + int type; + int r, g, b; + int d; + DepthPtr pDepth; + + nformats = 0; + /* formats required by protocol */ + formats[nformats].format = PICT_a1; + formats[nformats].depth = 1; + nformats++; + formats[nformats].format = PICT_FORMAT(BitsPerPixel(8), + PICT_TYPE_A, + 8, 0, 0, 0); + formats[nformats].depth = 8; + nformats++; + formats[nformats].format = PICT_FORMAT(BitsPerPixel(4), + PICT_TYPE_A, + 4, 0, 0, 0); + formats[nformats].depth = 4; + nformats++; + formats[nformats].format = PICT_a8r8g8b8; + formats[nformats].depth = 32; + nformats++; + formats[nformats].format = PICT_x8r8g8b8; + formats[nformats].depth = 32; + nformats++; + + /* now look through the depths and visuals adding other formats */ + for (v = 0; v < pScreen->numVisuals; v++) + { + pVisual = &pScreen->visuals[v]; + depth = visualDepth (pScreen, pVisual); + if (!depth) + continue; + bpp = BitsPerPixel (depth); + switch (pVisual->class) { + case DirectColor: + case TrueColor: + r = Ones (pVisual->redMask); + g = Ones (pVisual->greenMask); + b = Ones (pVisual->blueMask); + type = PICT_TYPE_OTHER; + /* + * Current rendering code supports only two direct formats, + * fields must be packed together at the bottom of the pixel + * and must be either RGB or BGR + */ + if (pVisual->offsetBlue == 0 && + pVisual->offsetGreen == b && + pVisual->offsetRed == b + g) + { + type = PICT_TYPE_ARGB; + } + else if (pVisual->offsetRed == 0 && + pVisual->offsetGreen == r && + pVisual->offsetBlue == r + g) + { + type = PICT_TYPE_ABGR; + } + if (type != PICT_TYPE_OTHER) + { + format = PICT_FORMAT(bpp, type, 0, r, g, b); + nformats = addFormat (formats, nformats, format, depth); + } + break; + case StaticColor: + case PseudoColor: + format = PICT_VISFORMAT (bpp, PICT_TYPE_COLOR, v); + nformats = addFormat (formats, nformats, format, depth); + break; + case StaticGray: + case GrayScale: + format = PICT_VISFORMAT (bpp, PICT_TYPE_GRAY, v); + nformats = addFormat (formats, nformats, format, depth); + break; + } + } + /* + * Walk supported depths and add useful Direct formats + */ + for (d = 0; d < pScreen->numDepths; d++) + { + pDepth = &pScreen->allowedDepths[d]; + bpp = BitsPerPixel (pDepth->depth); + format = 0; + switch (bpp) { + case 16: + /* depth 12 formats */ + if (pDepth->depth >= 12) + { + nformats = addFormat (formats, nformats, + PICT_x4r4g4b4, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_x4b4g4r4, pDepth->depth); + } + /* depth 15 formats */ + if (pDepth->depth >= 15) + { + nformats = addFormat (formats, nformats, + PICT_x1r5g5b5, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_x1b5g5r5, pDepth->depth); + } + /* depth 16 formats */ + if (pDepth->depth >= 16) + { + nformats = addFormat (formats, nformats, + PICT_a1r5g5b5, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_a1b5g5r5, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_r5g6b5, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_b5g6r5, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_a4r4g4b4, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_a4b4g4r4, pDepth->depth); + } + break; + case 24: + if (pDepth->depth >= 24) + { + nformats = addFormat (formats, nformats, + PICT_r8g8b8, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_b8g8r8, pDepth->depth); + } + break; + case 32: + if (pDepth->depth >= 24) + { + nformats = addFormat (formats, nformats, + PICT_x8r8g8b8, pDepth->depth); + nformats = addFormat (formats, nformats, + PICT_x8b8g8r8, pDepth->depth); + } + break; + } + } + + + pFormats = (PictFormatPtr) xalloc (nformats * sizeof (PictFormatRec)); + if (!pFormats) + return 0; + memset (pFormats, '\0', nformats * sizeof (PictFormatRec)); + for (f = 0; f < nformats; f++) + { + pFormats[f].id = FakeClientID (0); + pFormats[f].depth = formats[f].depth; + format = formats[f].format; + pFormats[f].format = format; + switch (PICT_FORMAT_TYPE(format)) { + case PICT_TYPE_ARGB: + pFormats[f].type = PictTypeDirect; + + pFormats[f].direct.alphaMask = Mask(PICT_FORMAT_A(format)); + if (pFormats[f].direct.alphaMask) + pFormats[f].direct.alpha = (PICT_FORMAT_R(format) + + PICT_FORMAT_G(format) + + PICT_FORMAT_B(format)); + + pFormats[f].direct.redMask = Mask(PICT_FORMAT_R(format)); + pFormats[f].direct.red = (PICT_FORMAT_G(format) + + PICT_FORMAT_B(format)); + + pFormats[f].direct.greenMask = Mask(PICT_FORMAT_G(format)); + pFormats[f].direct.green = PICT_FORMAT_B(format); + + pFormats[f].direct.blueMask = Mask(PICT_FORMAT_B(format)); + pFormats[f].direct.blue = 0; + break; + + case PICT_TYPE_ABGR: + pFormats[f].type = PictTypeDirect; + + pFormats[f].direct.alphaMask = Mask(PICT_FORMAT_A(format)); + if (pFormats[f].direct.alphaMask) + pFormats[f].direct.alpha = (PICT_FORMAT_B(format) + + PICT_FORMAT_G(format) + + PICT_FORMAT_R(format)); + + pFormats[f].direct.blueMask = Mask(PICT_FORMAT_B(format)); + pFormats[f].direct.blue = (PICT_FORMAT_G(format) + + PICT_FORMAT_R(format)); + + pFormats[f].direct.greenMask = Mask(PICT_FORMAT_G(format)); + pFormats[f].direct.green = PICT_FORMAT_R(format); + + pFormats[f].direct.redMask = Mask(PICT_FORMAT_R(format)); + pFormats[f].direct.red = 0; + break; + + case PICT_TYPE_A: + pFormats[f].type = PictTypeDirect; + + pFormats[f].direct.alpha = 0; + pFormats[f].direct.alphaMask = Mask(PICT_FORMAT_A(format)); + + /* remaining fields already set to zero */ + break; + + case PICT_TYPE_COLOR: + case PICT_TYPE_GRAY: + pFormats[f].type = PictTypeIndexed; + pFormats[f].index.vid = pScreen->visuals[PICT_FORMAT_VIS(format)].vid; + break; + } + } + *nformatp = nformats; + return pFormats; +} + +static VisualPtr +PictureFindVisual (ScreenPtr pScreen, VisualID visual) +{ + int i; + VisualPtr pVisual; + for (i = 0, pVisual = pScreen->visuals; + i < pScreen->numVisuals; + i++, pVisual++) + { + if (pVisual->vid == visual) + return pVisual; + } + return 0; +} + +Bool +PictureInitIndexedFormat(ScreenPtr pScreen, PictFormatPtr format) +{ + PictureScreenPtr ps = GetPictureScreenIfSet(pScreen); + + if (format->type != PictTypeIndexed || format->index.pColormap) + return TRUE; + + if (format->index.vid == pScreen->rootVisual) { + format->index.pColormap = + (ColormapPtr) LookupIDByType(pScreen->defColormap, RT_COLORMAP); + } else { + VisualPtr pVisual = PictureFindVisual(pScreen, format->index.vid); + if (CreateColormap(FakeClientID (0), pScreen, pVisual, + &format->index.pColormap, AllocNone, 0) + != Success) + return FALSE; + } + if (!ps->InitIndexed(pScreen, format)) + return FALSE; + return TRUE; +} + +static Bool +PictureInitIndexedFormats (ScreenPtr pScreen) +{ + PictureScreenPtr ps = GetPictureScreenIfSet(pScreen); + PictFormatPtr format; + int nformat; + + if (!ps) + return FALSE; + format = ps->formats; + nformat = ps->nformats; + while (nformat--) + if (!PictureInitIndexedFormat(pScreen, format++)) + return FALSE; + return TRUE; +} + +Bool +PictureFinishInit (void) +{ + int s; + + for (s = 0; s < screenInfo.numScreens; s++) + { + if (!PictureInitIndexedFormats (screenInfo.screens[s])) + return FALSE; + (void) AnimCurInit (screenInfo.screens[s]); + } + + return TRUE; +} + +_X_EXPORT Bool +PictureSetSubpixelOrder (ScreenPtr pScreen, int subpixel) +{ + PictureScreenPtr ps = GetPictureScreenIfSet(pScreen); + + if (!ps) + return FALSE; + ps->subpixel = subpixel; + return TRUE; + +} + +_X_EXPORT int +PictureGetSubpixelOrder (ScreenPtr pScreen) +{ + PictureScreenPtr ps = GetPictureScreenIfSet(pScreen); + + if (!ps) + return SubPixelUnknown; + return ps->subpixel; +} + +PictFormatPtr +PictureMatchVisual (ScreenPtr pScreen, int depth, VisualPtr pVisual) +{ + PictureScreenPtr ps = GetPictureScreenIfSet(pScreen); + PictFormatPtr format; + int nformat; + int type; + + if (!ps) + return 0; + format = ps->formats; + nformat = ps->nformats; + switch (pVisual->class) { + case StaticGray: + case GrayScale: + case StaticColor: + case PseudoColor: + type = PictTypeIndexed; + break; + case TrueColor: + case DirectColor: + type = PictTypeDirect; + break; + default: + return 0; + } + while (nformat--) + { + if (format->depth == depth && format->type == type) + { + if (type == PictTypeIndexed) + { + if (format->index.vid == pVisual->vid) + return format; + } + else + { + if (format->direct.redMask << format->direct.red == + pVisual->redMask && + format->direct.greenMask << format->direct.green == + pVisual->greenMask && + format->direct.blueMask << format->direct.blue == + pVisual->blueMask) + { + return format; + } + } + } + format++; + } + return 0; +} + +PictFormatPtr +PictureMatchFormat (ScreenPtr pScreen, int depth, CARD32 f) +{ + PictureScreenPtr ps = GetPictureScreenIfSet(pScreen); + PictFormatPtr format; + int nformat; + + if (!ps) + return 0; + format = ps->formats; + nformat = ps->nformats; + while (nformat--) + { + if (format->depth == depth && format->format == (f & 0xffffff)) + return format; + format++; + } + return 0; +} + +int +PictureParseCmapPolicy (const char *name) +{ + if ( strcmp (name, "default" ) == 0) + return PictureCmapPolicyDefault; + else if ( strcmp (name, "mono" ) == 0) + return PictureCmapPolicyMono; + else if ( strcmp (name, "gray" ) == 0) + return PictureCmapPolicyGray; + else if ( strcmp (name, "color" ) == 0) + return PictureCmapPolicyColor; + else if ( strcmp (name, "all" ) == 0) + return PictureCmapPolicyAll; + else + return PictureCmapPolicyInvalid; +} + +_X_EXPORT Bool +PictureInit (ScreenPtr pScreen, PictFormatPtr formats, int nformats) +{ + PictureScreenPtr ps; + int n; + CARD32 type, a, r, g, b; + + if (PictureGeneration != serverGeneration) + { + PictureType = CreateNewResourceType (FreePicture); + if (!PictureType) + return FALSE; + PictFormatType = CreateNewResourceType (FreePictFormat); + if (!PictFormatType) + return FALSE; + GlyphSetType = CreateNewResourceType (FreeGlyphSet); + if (!GlyphSetType) + return FALSE; + PictureGeneration = serverGeneration; + RegisterResourceName (PictureType, "PICTURE"); + RegisterResourceName (PictFormatType, "PICTFORMAT"); + RegisterResourceName (GlyphSetType, "GLYPHSET"); + } + if (!formats) + { + formats = PictureCreateDefaultFormats (pScreen, &nformats); + if (!formats) + return FALSE; + } + for (n = 0; n < nformats; n++) + { + if (!AddResource (formats[n].id, PictFormatType, (pointer) (formats+n))) + { + xfree (formats); + return FALSE; + } + if (formats[n].type == PictTypeIndexed) + { + VisualPtr pVisual = PictureFindVisual (pScreen, formats[n].index.vid); + if ((pVisual->class | DynamicClass) == PseudoColor) + type = PICT_TYPE_COLOR; + else + type = PICT_TYPE_GRAY; + a = r = g = b = 0; + } + else + { + if ((formats[n].direct.redMask| + formats[n].direct.blueMask| + formats[n].direct.greenMask) == 0) + type = PICT_TYPE_A; + else if (formats[n].direct.red > formats[n].direct.blue) + type = PICT_TYPE_ARGB; + else + type = PICT_TYPE_ABGR; + a = Ones (formats[n].direct.alphaMask); + r = Ones (formats[n].direct.redMask); + g = Ones (formats[n].direct.greenMask); + b = Ones (formats[n].direct.blueMask); + } + formats[n].format = PICT_FORMAT(0,type,a,r,g,b); + } + ps = (PictureScreenPtr) xalloc (sizeof (PictureScreenRec)); + if (!ps) + { + xfree (formats); + return FALSE; + } + SetPictureScreen(pScreen, ps); + + ps->formats = formats; + ps->fallback = formats; + ps->nformats = nformats; + + ps->filters = 0; + ps->nfilters = 0; + ps->filterAliases = 0; + ps->nfilterAliases = 0; + + ps->subpixel = SubPixelUnknown; + + ps->CloseScreen = pScreen->CloseScreen; + ps->DestroyWindow = pScreen->DestroyWindow; + ps->StoreColors = pScreen->StoreColors; + pScreen->DestroyWindow = PictureDestroyWindow; + pScreen->CloseScreen = PictureCloseScreen; + pScreen->StoreColors = PictureStoreColors; + + if (!PictureSetDefaultFilters (pScreen)) + { + PictureResetFilters (pScreen); + SetPictureScreen(pScreen, 0); + xfree (formats); + xfree (ps); + return FALSE; + } + + return TRUE; +} + +void +SetPictureToDefaults (PicturePtr pPicture) +{ + pPicture->refcnt = 1; + pPicture->repeat = 0; + pPicture->graphicsExposures = FALSE; + pPicture->subWindowMode = ClipByChildren; + pPicture->polyEdge = PolyEdgeSharp; + pPicture->polyMode = PolyModePrecise; + pPicture->freeCompClip = FALSE; + pPicture->clientClipType = CT_NONE; + pPicture->componentAlpha = FALSE; + pPicture->repeatType = RepeatNone; + + pPicture->alphaMap = 0; + pPicture->alphaOrigin.x = 0; + pPicture->alphaOrigin.y = 0; + + pPicture->clipOrigin.x = 0; + pPicture->clipOrigin.y = 0; + pPicture->clientClip = 0; + + pPicture->transform = 0; + + pPicture->dither = None; + pPicture->filter = PictureGetFilterId (FilterNearest, -1, TRUE); + pPicture->filter_params = 0; + pPicture->filter_nparams = 0; + + pPicture->serialNumber = GC_CHANGE_SERIAL_BIT; + pPicture->stateChanges = (1 << (CPLastBit+1)) - 1; + pPicture->pSourcePict = 0; +} + +PicturePtr +CreatePicture (Picture pid, + DrawablePtr pDrawable, + PictFormatPtr pFormat, + Mask vmask, + XID *vlist, + ClientPtr client, + int *error) +{ + PicturePtr pPicture; + PictureScreenPtr ps = GetPictureScreen(pDrawable->pScreen); + + pPicture = (PicturePtr)xalloc(sizeof(PictureRec)); + if (!pPicture) + { + *error = BadAlloc; + return 0; + } + + pPicture->id = pid; + pPicture->pDrawable = pDrawable; + pPicture->pFormat = pFormat; + pPicture->format = pFormat->format | (pDrawable->bitsPerPixel << 24); + pPicture->devPrivates = NULL; + + /* security creation/labeling check */ + *error = XaceHook(XACE_RESOURCE_ACCESS, client, pid, PictureType, pPicture, + RT_PIXMAP, pDrawable, DixCreateAccess|DixSetAttrAccess); + if (*error != Success) + goto out; + + if (pDrawable->type == DRAWABLE_PIXMAP) + { + ++((PixmapPtr)pDrawable)->refcnt; + pPicture->pNext = 0; + } + else + { + pPicture->pNext = GetPictureWindow(((WindowPtr) pDrawable)); + SetPictureWindow(((WindowPtr) pDrawable), pPicture); + } + + SetPictureToDefaults (pPicture); + + if (vmask) + *error = ChangePicture (pPicture, vmask, vlist, 0, client); + else + *error = Success; + if (*error == Success) + *error = (*ps->CreatePicture) (pPicture); +out: + if (*error != Success) + { + FreePicture (pPicture, (XID) 0); + pPicture = 0; + } + return pPicture; +} + +static CARD32 xRenderColorToCard32(xRenderColor c) +{ + return + (c.alpha >> 8 << 24) | + (c.red >> 8 << 16) | + (c.green & 0xff00) | + (c.blue >> 8); +} + +static unsigned int premultiply(unsigned int x) +{ + unsigned int a = x >> 24; + unsigned int t = (x & 0xff00ff) * a + 0x800080; + t = (t + ((t >> 8) & 0xff00ff)) >> 8; + t &= 0xff00ff; + + x = ((x >> 8) & 0xff) * a + 0x80; + x = (x + ((x >> 8) & 0xff)); + x &= 0xff00; + x |= t | (a << 24); + return x; +} + +static unsigned int INTERPOLATE_PIXEL_256(unsigned int x, unsigned int a, + unsigned int y, unsigned int b) +{ + CARD32 t = (x & 0xff00ff) * a + (y & 0xff00ff) * b; + t >>= 8; + t &= 0xff00ff; + + x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b; + x &= 0xff00ff00; + x |= t; + return x; +} + +CARD32 +PictureGradientColor (PictGradientStopPtr stop1, + PictGradientStopPtr stop2, + CARD32 x) +{ + CARD32 current_color, next_color; + int dist, idist; + + current_color = xRenderColorToCard32 (stop1->color); + next_color = xRenderColorToCard32 (stop2->color); + + dist = (int) (256 * (x - stop1->x) / (stop2->x - stop1->x)); + idist = 256 - dist; + + return premultiply (INTERPOLATE_PIXEL_256 (current_color, idist, + next_color, dist)); +} + +static void initGradient(SourcePictPtr pGradient, int stopCount, + xFixed *stopPoints, xRenderColor *stopColors, int *error) +{ + int i; + xFixed dpos; + + if (stopCount <= 0) { + *error = BadValue; + return; + } + + dpos = -1; + for (i = 0; i < stopCount; ++i) { + if (stopPoints[i] < dpos || stopPoints[i] > (1<<16)) { + *error = BadValue; + return; + } + dpos = stopPoints[i]; + } + + pGradient->gradient.stops = xalloc(stopCount*sizeof(PictGradientStop)); + if (!pGradient->gradient.stops) { + *error = BadAlloc; + return; + } + + pGradient->gradient.nstops = stopCount; + + for (i = 0; i < stopCount; ++i) { + pGradient->gradient.stops[i].x = stopPoints[i]; + pGradient->gradient.stops[i].color = stopColors[i]; + } + + pGradient->gradient.class = SourcePictClassUnknown; + pGradient->gradient.stopRange = 0xffff; + pGradient->gradient.colorTable = NULL; + pGradient->gradient.colorTableSize = 0; +} + +static PicturePtr createSourcePicture(void) +{ + PicturePtr pPicture; + pPicture = (PicturePtr) xalloc(sizeof(PictureRec)); + pPicture->pDrawable = 0; + pPicture->pFormat = 0; + pPicture->pNext = 0; + pPicture->format = PICT_a8r8g8b8; + pPicture->devPrivates = 0; + + SetPictureToDefaults(pPicture); + return pPicture; +} + +PicturePtr +CreateSolidPicture (Picture pid, xRenderColor *color, int *error) +{ + PicturePtr pPicture; + pPicture = createSourcePicture(); + if (!pPicture) { + *error = BadAlloc; + return 0; + } + + pPicture->id = pid; + pPicture->pSourcePict = (SourcePictPtr) xalloc(sizeof(PictSolidFill)); + if (!pPicture->pSourcePict) { + *error = BadAlloc; + xfree(pPicture); + return 0; + } + pPicture->pSourcePict->type = SourcePictTypeSolidFill; + pPicture->pSourcePict->solidFill.color = xRenderColorToCard32(*color); + return pPicture; +} + +PicturePtr +CreateLinearGradientPicture (Picture pid, xPointFixed *p1, xPointFixed *p2, + int nStops, xFixed *stops, xRenderColor *colors, int *error) +{ + PicturePtr pPicture; + + if (nStops < 2) { + *error = BadValue; + return 0; + } + + pPicture = createSourcePicture(); + if (!pPicture) { + *error = BadAlloc; + return 0; + } + + pPicture->id = pid; + pPicture->pSourcePict = (SourcePictPtr) xalloc(sizeof(PictLinearGradient)); + if (!pPicture->pSourcePict) { + *error = BadAlloc; + xfree(pPicture); + return 0; + } + + pPicture->pSourcePict->linear.type = SourcePictTypeLinear; + pPicture->pSourcePict->linear.p1 = *p1; + pPicture->pSourcePict->linear.p2 = *p2; + + initGradient(pPicture->pSourcePict, nStops, stops, colors, error); + if (*error) { + xfree(pPicture); + return 0; + } + return pPicture; +} + +#define FixedToDouble(x) ((x)/65536.) + +PicturePtr +CreateRadialGradientPicture (Picture pid, xPointFixed *inner, xPointFixed *outer, + xFixed innerRadius, xFixed outerRadius, + int nStops, xFixed *stops, xRenderColor *colors, int *error) +{ + PicturePtr pPicture; + PictRadialGradient *radial; + + if (nStops < 2) { + *error = BadValue; + return 0; + } + + pPicture = createSourcePicture(); + if (!pPicture) { + *error = BadAlloc; + return 0; + } + + pPicture->id = pid; + pPicture->pSourcePict = (SourcePictPtr) xalloc(sizeof(PictRadialGradient)); + if (!pPicture->pSourcePict) { + *error = BadAlloc; + xfree(pPicture); + return 0; + } + radial = &pPicture->pSourcePict->radial; + + radial->type = SourcePictTypeRadial; + radial->c1.x = inner->x; + radial->c1.y = inner->y; + radial->c1.radius = innerRadius; + radial->c2.x = outer->x; + radial->c2.y = outer->y; + radial->c2.radius = outerRadius; + radial->cdx = (radial->c2.x - radial->c1.x) / 65536.; + radial->cdy = (radial->c2.y - radial->c1.y) / 65536.; + radial->dr = (radial->c2.radius - radial->c1.radius) / 65536.; + radial->A = ( radial->cdx * radial->cdx + + radial->cdy * radial->cdy + - radial->dr * radial->dr); + + initGradient(pPicture->pSourcePict, nStops, stops, colors, error); + if (*error) { + xfree(pPicture); + return 0; + } + return pPicture; +} + +PicturePtr +CreateConicalGradientPicture (Picture pid, xPointFixed *center, xFixed angle, + int nStops, xFixed *stops, xRenderColor *colors, int *error) +{ + PicturePtr pPicture; + + if (nStops < 2) { + *error = BadValue; + return 0; + } + + pPicture = createSourcePicture(); + if (!pPicture) { + *error = BadAlloc; + return 0; + } + + pPicture->id = pid; + pPicture->pSourcePict = (SourcePictPtr) xalloc(sizeof(PictConicalGradient)); + if (!pPicture->pSourcePict) { + *error = BadAlloc; + xfree(pPicture); + return 0; + } + + pPicture->pSourcePict->conical.type = SourcePictTypeConical; + pPicture->pSourcePict->conical.center = *center; + pPicture->pSourcePict->conical.angle = angle; + + initGradient(pPicture->pSourcePict, nStops, stops, colors, error); + if (*error) { + xfree(pPicture); + return 0; + } + return pPicture; +} + +#define NEXT_VAL(_type) (vlist ? (_type) *vlist++ : (_type) ulist++->val) + +#define NEXT_PTR(_type) ((_type) ulist++->ptr) + +int +ChangePicture (PicturePtr pPicture, + Mask vmask, + XID *vlist, + DevUnion *ulist, + ClientPtr client) +{ + ScreenPtr pScreen = pPicture->pDrawable ? pPicture->pDrawable->pScreen : 0; + PictureScreenPtr ps = pScreen ? GetPictureScreen(pScreen) : 0; + BITS32 index2; + int error = 0; + BITS32 maskQ; + + pPicture->serialNumber |= GC_CHANGE_SERIAL_BIT; + maskQ = vmask; + while (vmask && !error) + { + index2 = (BITS32) lowbit (vmask); + vmask &= ~index2; + pPicture->stateChanges |= index2; + switch (index2) + { + case CPRepeat: + { + unsigned int newr; + newr = NEXT_VAL(unsigned int); + if (newr <= RepeatReflect) + { + pPicture->repeat = (newr != RepeatNone); + pPicture->repeatType = newr; + } + else + { + client->errorValue = newr; + error = BadValue; + } + } + break; + case CPAlphaMap: + { + PicturePtr pAlpha; + + if (vlist) + { + Picture pid = NEXT_VAL(Picture); + + if (pid == None) + pAlpha = 0; + else + { + error = dixLookupResource((pointer *)&pAlpha, pid, + PictureType, client, + DixReadAccess); + if (error != Success) + { + client->errorValue = pid; + error = (error == BadValue) ? BadPixmap : error; + break; + } + if (pAlpha->pDrawable == NULL || + pAlpha->pDrawable->type != DRAWABLE_PIXMAP) + { + client->errorValue = pid; + error = BadMatch; + break; + } + } + } + else + pAlpha = NEXT_PTR(PicturePtr); + if (!error) + { + if (pAlpha && pAlpha->pDrawable->type == DRAWABLE_PIXMAP) + pAlpha->refcnt++; + if (pPicture->alphaMap) + FreePicture ((pointer) pPicture->alphaMap, (XID) 0); + pPicture->alphaMap = pAlpha; + } + } + break; + case CPAlphaXOrigin: + pPicture->alphaOrigin.x = NEXT_VAL(INT16); + break; + case CPAlphaYOrigin: + pPicture->alphaOrigin.y = NEXT_VAL(INT16); + break; + case CPClipXOrigin: + pPicture->clipOrigin.x = NEXT_VAL(INT16); + break; + case CPClipYOrigin: + pPicture->clipOrigin.y = NEXT_VAL(INT16); + break; + case CPClipMask: + { + Pixmap pid; + PixmapPtr pPixmap; + int clipType; + if (!pScreen) + return BadDrawable; + + if (vlist) + { + pid = NEXT_VAL(Pixmap); + if (pid == None) + { + clipType = CT_NONE; + pPixmap = NullPixmap; + } + else + { + clipType = CT_PIXMAP; + error = dixLookupResource((pointer *)&pPixmap, pid, + RT_PIXMAP, client, + DixReadAccess); + if (error != Success) + { + client->errorValue = pid; + error = (error == BadValue) ? BadPixmap : error; + break; + } + } + } + else + { + pPixmap = NEXT_PTR(PixmapPtr); + if (pPixmap) + clipType = CT_PIXMAP; + else + clipType = CT_NONE; + } + + if (pPixmap) + { + if ((pPixmap->drawable.depth != 1) || + (pPixmap->drawable.pScreen != pScreen)) + { + error = BadMatch; + break; + } + else + { + clipType = CT_PIXMAP; + pPixmap->refcnt++; + } + } + error = (*ps->ChangePictureClip)(pPicture, clipType, + (pointer)pPixmap, 0); + break; + } + case CPGraphicsExposure: + { + unsigned int newe; + newe = NEXT_VAL(unsigned int); + if (newe <= xTrue) + pPicture->graphicsExposures = newe; + else + { + client->errorValue = newe; + error = BadValue; + } + } + break; + case CPSubwindowMode: + { + unsigned int news; + news = NEXT_VAL(unsigned int); + if (news == ClipByChildren || news == IncludeInferiors) + pPicture->subWindowMode = news; + else + { + client->errorValue = news; + error = BadValue; + } + } + break; + case CPPolyEdge: + { + unsigned int newe; + newe = NEXT_VAL(unsigned int); + if (newe == PolyEdgeSharp || newe == PolyEdgeSmooth) + pPicture->polyEdge = newe; + else + { + client->errorValue = newe; + error = BadValue; + } + } + break; + case CPPolyMode: + { + unsigned int newm; + newm = NEXT_VAL(unsigned int); + if (newm == PolyModePrecise || newm == PolyModeImprecise) + pPicture->polyMode = newm; + else + { + client->errorValue = newm; + error = BadValue; + } + } + break; + case CPDither: + pPicture->dither = NEXT_VAL(Atom); + break; + case CPComponentAlpha: + { + unsigned int newca; + + newca = NEXT_VAL (unsigned int); + if (newca <= xTrue) + pPicture->componentAlpha = newca; + else + { + client->errorValue = newca; + error = BadValue; + } + } + break; + default: + client->errorValue = maskQ; + error = BadValue; + break; + } + } + if (ps) + (*ps->ChangePicture) (pPicture, maskQ); + return error; +} + +int +SetPictureClipRects (PicturePtr pPicture, + int xOrigin, + int yOrigin, + int nRect, + xRectangle *rects) +{ + ScreenPtr pScreen = pPicture->pDrawable->pScreen; + PictureScreenPtr ps = GetPictureScreen(pScreen); + RegionPtr clientClip; + int result; + + clientClip = RECTS_TO_REGION(pScreen, + nRect, rects, CT_UNSORTED); + if (!clientClip) + return BadAlloc; + result =(*ps->ChangePictureClip) (pPicture, CT_REGION, + (pointer) clientClip, 0); + if (result == Success) + { + pPicture->clipOrigin.x = xOrigin; + pPicture->clipOrigin.y = yOrigin; + pPicture->stateChanges |= CPClipXOrigin|CPClipYOrigin|CPClipMask; + pPicture->serialNumber |= GC_CHANGE_SERIAL_BIT; + } + return result; +} + +int +SetPictureClipRegion (PicturePtr pPicture, + int xOrigin, + int yOrigin, + RegionPtr pRegion) +{ + ScreenPtr pScreen = pPicture->pDrawable->pScreen; + PictureScreenPtr ps = GetPictureScreen(pScreen); + RegionPtr clientClip; + int result; + int type; + + if (pRegion) + { + type = CT_REGION; + clientClip = REGION_CREATE (pScreen, + REGION_EXTENTS(pScreen, pRegion), + REGION_NUM_RECTS(pRegion)); + if (!clientClip) + return BadAlloc; + if (!REGION_COPY (pSCreen, clientClip, pRegion)) + { + REGION_DESTROY (pScreen, clientClip); + return BadAlloc; + } + } + else + { + type = CT_NONE; + clientClip = 0; + } + + result =(*ps->ChangePictureClip) (pPicture, type, + (pointer) clientClip, 0); + if (result == Success) + { + pPicture->clipOrigin.x = xOrigin; + pPicture->clipOrigin.y = yOrigin; + pPicture->stateChanges |= CPClipXOrigin|CPClipYOrigin|CPClipMask; + pPicture->serialNumber |= GC_CHANGE_SERIAL_BIT; + } + return result; +} + +static Bool +transformIsIdentity(PictTransform *t) +{ + return ((t->matrix[0][0] == t->matrix[1][1]) && + (t->matrix[0][0] == t->matrix[2][2]) && + (t->matrix[0][0] != 0) && + (t->matrix[0][1] == 0) && + (t->matrix[0][2] == 0) && + (t->matrix[1][0] == 0) && + (t->matrix[1][2] == 0) && + (t->matrix[2][0] == 0) && + (t->matrix[2][1] == 0)); +} + +int +SetPictureTransform (PicturePtr pPicture, + PictTransform *transform) +{ + if (transform && transformIsIdentity (transform)) + transform = 0; + + if (transform) + { + if (!pPicture->transform) + { + pPicture->transform = (PictTransform *) xalloc (sizeof (PictTransform)); + if (!pPicture->transform) + return BadAlloc; + } + *pPicture->transform = *transform; + } + else + { + if (pPicture->transform) + { + xfree (pPicture->transform); + pPicture->transform = 0; + } + } + pPicture->serialNumber |= GC_CHANGE_SERIAL_BIT; + + if (pPicture->pDrawable != NULL) { + int result; + PictureScreenPtr ps = GetPictureScreen(pPicture->pDrawable->pScreen); + + result = (*ps->ChangePictureTransform) (pPicture, transform); + + return result; + } + + return Success; +} + +void +CopyPicture (PicturePtr pSrc, + Mask mask, + PicturePtr pDst) +{ + PictureScreenPtr ps = GetPictureScreen(pSrc->pDrawable->pScreen); + Mask origMask = mask; + + pDst->serialNumber |= GC_CHANGE_SERIAL_BIT; + pDst->stateChanges |= mask; + + while (mask) { + Mask bit = lowbit(mask); + + switch (bit) + { + case CPRepeat: + pDst->repeat = pSrc->repeat; + pDst->repeatType = pSrc->repeatType; + break; + case CPAlphaMap: + if (pSrc->alphaMap && pSrc->alphaMap->pDrawable->type == DRAWABLE_PIXMAP) + pSrc->alphaMap->refcnt++; + if (pDst->alphaMap) + FreePicture ((pointer) pDst->alphaMap, (XID) 0); + pDst->alphaMap = pSrc->alphaMap; + break; + case CPAlphaXOrigin: + pDst->alphaOrigin.x = pSrc->alphaOrigin.x; + break; + case CPAlphaYOrigin: + pDst->alphaOrigin.y = pSrc->alphaOrigin.y; + break; + case CPClipXOrigin: + pDst->clipOrigin.x = pSrc->clipOrigin.x; + break; + case CPClipYOrigin: + pDst->clipOrigin.y = pSrc->clipOrigin.y; + break; + case CPClipMask: + switch (pSrc->clientClipType) { + case CT_NONE: + (*ps->ChangePictureClip)(pDst, CT_NONE, NULL, 0); + break; + case CT_REGION: + if (!pSrc->clientClip) { + (*ps->ChangePictureClip)(pDst, CT_NONE, NULL, 0); + } else { + RegionPtr clientClip; + RegionPtr srcClientClip = (RegionPtr)pSrc->clientClip; + + clientClip = REGION_CREATE(pSrc->pDrawable->pScreen, + REGION_EXTENTS(pSrc->pDrawable->pScreen, srcClientClip), + REGION_NUM_RECTS(srcClientClip)); + (*ps->ChangePictureClip)(pDst, CT_REGION, clientClip, 0); + } + break; + default: + /* XXX: CT_PIXMAP unimplemented */ + break; + } + break; + case CPGraphicsExposure: + pDst->graphicsExposures = pSrc->graphicsExposures; + break; + case CPPolyEdge: + pDst->polyEdge = pSrc->polyEdge; + break; + case CPPolyMode: + pDst->polyMode = pSrc->polyMode; + break; + case CPDither: + pDst->dither = pSrc->dither; + break; + case CPComponentAlpha: + pDst->componentAlpha = pSrc->componentAlpha; + break; + } + mask &= ~bit; + } + + (*ps->ChangePicture)(pDst, origMask); +} + +static void +ValidateOnePicture (PicturePtr pPicture) +{ + if (pPicture->pDrawable && pPicture->serialNumber != pPicture->pDrawable->serialNumber) + { + PictureScreenPtr ps = GetPictureScreen(pPicture->pDrawable->pScreen); + + (*ps->ValidatePicture) (pPicture, pPicture->stateChanges); + pPicture->stateChanges = 0; + pPicture->serialNumber = pPicture->pDrawable->serialNumber; + } +} + +void +ValidatePicture(PicturePtr pPicture) +{ + ValidateOnePicture (pPicture); + if (pPicture->alphaMap) + ValidateOnePicture (pPicture->alphaMap); +} + +int +FreePicture (pointer value, + XID pid) +{ + PicturePtr pPicture = (PicturePtr) value; + + if (--pPicture->refcnt == 0) + { + if (pPicture->transform) + xfree (pPicture->transform); + + if (pPicture->pSourcePict) + { + if (pPicture->pSourcePict->type != SourcePictTypeSolidFill) + xfree(pPicture->pSourcePict->linear.stops); + + xfree(pPicture->pSourcePict); + } + + if (pPicture->pDrawable) + { + ScreenPtr pScreen = pPicture->pDrawable->pScreen; + PictureScreenPtr ps = GetPictureScreen(pScreen); + + if (pPicture->alphaMap) + FreePicture ((pointer) pPicture->alphaMap, (XID) 0); + (*ps->DestroyPicture) (pPicture); + (*ps->DestroyPictureClip) (pPicture); + if (pPicture->pDrawable->type == DRAWABLE_WINDOW) + { + WindowPtr pWindow = (WindowPtr) pPicture->pDrawable; + PicturePtr *pPrev; + + for (pPrev = (PicturePtr *)dixLookupPrivateAddr + (&pWindow->devPrivates, PictureWindowPrivateKey); + *pPrev; + pPrev = &(*pPrev)->pNext) + { + if (*pPrev == pPicture) + { + *pPrev = pPicture->pNext; + break; + } + } + } + else if (pPicture->pDrawable->type == DRAWABLE_PIXMAP) + { + (*pScreen->DestroyPixmap) ((PixmapPtr)pPicture->pDrawable); + } + } + dixFreePrivates(pPicture->devPrivates); + xfree (pPicture); + } + return Success; +} + +int +FreePictFormat (pointer pPictFormat, + XID pid) +{ + return Success; +} + +/** + * ReduceCompositeOp is used to choose simpler ops for cases where alpha + * channels are always one and so math on the alpha channel per pixel becomes + * unnecessary. It may also avoid destination reads sometimes if apps aren't + * being careful to avoid these cases. + */ +static CARD8 +ReduceCompositeOp (CARD8 op, PicturePtr pSrc, PicturePtr pMask, PicturePtr pDst, + INT16 xSrc, INT16 ySrc, CARD16 width, CARD16 height) +{ + Bool no_src_alpha, no_dst_alpha; + + /* Sampling off the edge of a RepeatNone picture introduces alpha + * even if the picture itself doesn't have alpha. We don't try to + * detect every case where we don't sample off the edge, just the + * simplest case where there is no transform on the source + * picture. + */ + no_src_alpha = PICT_FORMAT_COLOR(pSrc->format) && + PICT_FORMAT_A(pSrc->format) == 0 && + (pSrc->repeatType != RepeatNone || + (!pSrc->transform && + xSrc >= 0 && ySrc >= 0 && + xSrc + width <= pSrc->pDrawable->width && + ySrc + height <= pSrc->pDrawable->height)) && + pSrc->alphaMap == NULL && + pMask == NULL; + no_dst_alpha = PICT_FORMAT_COLOR(pDst->format) && + PICT_FORMAT_A(pDst->format) == 0 && + pDst->alphaMap == NULL; + + /* TODO, maybe: Conjoint and Disjoint op reductions? */ + + /* Deal with simplifications where the source alpha is always 1. */ + if (no_src_alpha) + { + switch (op) { + case PictOpOver: + op = PictOpSrc; + break; + case PictOpInReverse: + op = PictOpDst; + break; + case PictOpOutReverse: + op = PictOpClear; + break; + case PictOpAtop: + op = PictOpIn; + break; + case PictOpAtopReverse: + op = PictOpOverReverse; + break; + case PictOpXor: + op = PictOpOut; + break; + default: + break; + } + } + + /* Deal with simplifications when the destination alpha is always 1 */ + if (no_dst_alpha) + { + switch (op) { + case PictOpOverReverse: + op = PictOpDst; + break; + case PictOpIn: + op = PictOpSrc; + break; + case PictOpOut: + op = PictOpClear; + break; + case PictOpAtop: + op = PictOpOver; + break; + case PictOpXor: + op = PictOpOutReverse; + break; + default: + break; + } + } + + /* Reduce some con/disjoint ops to the basic names. */ + switch (op) { + case PictOpDisjointClear: + case PictOpConjointClear: + op = PictOpClear; + break; + case PictOpDisjointSrc: + case PictOpConjointSrc: + op = PictOpSrc; + break; + case PictOpDisjointDst: + case PictOpConjointDst: + op = PictOpDst; + break; + default: + break; + } + + return op; +} + +void +CompositePicture (CARD8 op, + PicturePtr pSrc, + PicturePtr pMask, + PicturePtr pDst, + INT16 xSrc, + INT16 ySrc, + INT16 xMask, + INT16 yMask, + INT16 xDst, + INT16 yDst, + CARD16 width, + CARD16 height) +{ + PictureScreenPtr ps = GetPictureScreen(pDst->pDrawable->pScreen); + + ValidatePicture (pSrc); + if (pMask) + ValidatePicture (pMask); + ValidatePicture (pDst); + + op = ReduceCompositeOp (op, pSrc, pMask, pDst, xSrc, ySrc, width, height); + if (op == PictOpDst) + return; + + (*ps->Composite) (op, + pSrc, + pMask, + pDst, + xSrc, + ySrc, + xMask, + yMask, + xDst, + yDst, + width, + height); +} + +void +CompositeRects (CARD8 op, + PicturePtr pDst, + xRenderColor *color, + int nRect, + xRectangle *rects) +{ + PictureScreenPtr ps = GetPictureScreen(pDst->pDrawable->pScreen); + + ValidatePicture (pDst); + (*ps->CompositeRects) (op, pDst, color, nRect, rects); +} + +void +CompositeTrapezoids (CARD8 op, + PicturePtr pSrc, + PicturePtr pDst, + PictFormatPtr maskFormat, + INT16 xSrc, + INT16 ySrc, + int ntrap, + xTrapezoid *traps) +{ + PictureScreenPtr ps = GetPictureScreen(pDst->pDrawable->pScreen); + + ValidatePicture (pSrc); + ValidatePicture (pDst); + (*ps->Trapezoids) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntrap, traps); +} + +void +CompositeTriangles (CARD8 op, + PicturePtr pSrc, + PicturePtr pDst, + PictFormatPtr maskFormat, + INT16 xSrc, + INT16 ySrc, + int ntriangles, + xTriangle *triangles) +{ + PictureScreenPtr ps = GetPictureScreen(pDst->pDrawable->pScreen); + + ValidatePicture (pSrc); + ValidatePicture (pDst); + (*ps->Triangles) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntriangles, triangles); +} + +void +CompositeTriStrip (CARD8 op, + PicturePtr pSrc, + PicturePtr pDst, + PictFormatPtr maskFormat, + INT16 xSrc, + INT16 ySrc, + int npoints, + xPointFixed *points) +{ + PictureScreenPtr ps = GetPictureScreen(pDst->pDrawable->pScreen); + + ValidatePicture (pSrc); + ValidatePicture (pDst); + (*ps->TriStrip) (op, pSrc, pDst, maskFormat, xSrc, ySrc, npoints, points); +} + +void +CompositeTriFan (CARD8 op, + PicturePtr pSrc, + PicturePtr pDst, + PictFormatPtr maskFormat, + INT16 xSrc, + INT16 ySrc, + int npoints, + xPointFixed *points) +{ + PictureScreenPtr ps = GetPictureScreen(pDst->pDrawable->pScreen); + + ValidatePicture (pSrc); + ValidatePicture (pDst); + (*ps->TriFan) (op, pSrc, pDst, maskFormat, xSrc, ySrc, npoints, points); +} + +void +AddTraps (PicturePtr pPicture, + INT16 xOff, + INT16 yOff, + int ntrap, + xTrap *traps) +{ + PictureScreenPtr ps = GetPictureScreen(pPicture->pDrawable->pScreen); + + ValidatePicture (pPicture); + (*ps->AddTraps) (pPicture, xOff, yOff, ntrap, traps); +} + +_X_EXPORT Bool +PictureTransformPoint3d (PictTransformPtr transform, + PictVectorPtr vector) +{ + PictVector result; + int i, j; + xFixed_32_32 partial; + xFixed_48_16 v; + + for (j = 0; j < 3; j++) + { + v = 0; + for (i = 0; i < 3; i++) + { + partial = ((xFixed_48_16) transform->matrix[j][i] * + (xFixed_48_16) vector->vector[i]); + v += partial >> 16; + } + if (v > MAX_FIXED_48_16 || v < MIN_FIXED_48_16) + return FALSE; + result.vector[j] = (xFixed) v; + } + if (!result.vector[2]) + return FALSE; + *vector = result; + return TRUE; +} + + +_X_EXPORT Bool +PictureTransformPoint (PictTransformPtr transform, + PictVectorPtr vector) +{ + PictVector result; + int i, j; + xFixed_32_32 partial; + xFixed_48_16 v; + + for (j = 0; j < 3; j++) + { + v = 0; + for (i = 0; i < 3; i++) + { + partial = ((xFixed_48_16) transform->matrix[j][i] * + (xFixed_48_16) vector->vector[i]); + v += partial >> 16; + } + if (v > MAX_FIXED_48_16 || v < MIN_FIXED_48_16) + return FALSE; + result.vector[j] = (xFixed) v; + } + if (!result.vector[2]) + return FALSE; + for (j = 0; j < 2; j++) + { + partial = (xFixed_48_16) result.vector[j] << 16; + v = partial / result.vector[2]; + if (v > MAX_FIXED_48_16 || v < MIN_FIXED_48_16) + return FALSE; + vector->vector[j] = (xFixed) v; + } + vector->vector[2] = xFixed1; + return TRUE; +} |