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Add kernel size to Render filters. 

This width/height value lets filter users know how far the filter spreads
into the source image.
This commit is contained in:
Keith Packard 2008-03-17 15:19:17 -07:00
parent 40f3dff6b3
commit 1df02d7ddd
2 changed files with 26 additions and 9 deletions
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27
render/filter.c
View File

@ -126,7 +126,9 @@ PictureFreeFilterIds (void)
_X_EXPORT int
PictureAddFilter (ScreenPtr pScreen,
char *filter,
PictFilterValidateParamsProcPtr ValidateParams)
PictFilterValidateParamsProcPtr ValidateParams,
int width,
int height)
{
PictureScreenPtr ps = GetPictureScreen(pScreen);
int id = PictureGetFilterId (filter, -1, TRUE);
@ -152,6 +154,8 @@ PictureAddFilter (ScreenPtr pScreen,
ps->filters[i].name = PictureGetFilterName (id);
ps->filters[i].id = id;
ps->filters[i].ValidateParams = ValidateParams;
ps->filters[i].width = width;
ps->filters[i].height = height;
return id;
}
@ -216,18 +220,26 @@ static Bool
convolutionFilterValidateParams (ScreenPtr pScreen,
int filter,
xFixed *params,
int nparams)
int nparams,
int *width,
int *height)
{
int w, h;
if (nparams < 3)
return FALSE;
if (xFixedFrac (params[0]) || xFixedFrac (params[1]))
return FALSE;
w = xFixedToInt (params[0]);
h = xFixedToInt (params[1]);
nparams -= 2;
if ((xFixedToInt (params[0]) * xFixedToInt (params[1])) > nparams)
if (w * h > nparams)
return FALSE;
*width = w;
*height = h;
return TRUE;
}
@ -238,9 +250,9 @@ PictureSetDefaultFilters (ScreenPtr pScreen)
if (!filterNames)
if (!PictureSetDefaultIds ())
return FALSE;
if (PictureAddFilter (pScreen, FilterNearest, 0) < 0)
if (PictureAddFilter (pScreen, FilterNearest, 0, 1, 1) < 0)
return FALSE;
if (PictureAddFilter (pScreen, FilterBilinear, 0) < 0)
if (PictureAddFilter (pScreen, FilterBilinear, 0, 4, 4) < 0)
return FALSE;
if (!PictureSetFilterAlias (pScreen, FilterNearest, FilterFast))
@ -250,7 +262,7 @@ PictureSetDefaultFilters (ScreenPtr pScreen)
if (!PictureSetFilterAlias (pScreen, FilterBilinear, FilterBest))
return FALSE;
if (PictureAddFilter (pScreen, FilterConvolution, convolutionFilterValidateParams) < 0)
if (PictureAddFilter (pScreen, FilterConvolution, convolutionFilterValidateParams, 0, 0) < 0)
return FALSE;
return TRUE;
@ -314,7 +326,8 @@ SetPicturePictFilter (PicturePtr pPicture, PictFilterPtr pFilter,
if (pFilter->ValidateParams)
{
if (!(*pFilter->ValidateParams) (pScreen, pFilter->id, params, nparams))
int width, height;
if (!(*pFilter->ValidateParams) (pScreen, pFilter->id, params, nparams, &width, &height))
return BadMatch;
}
else if (nparams)

8
render/picturestr.h
View File

@ -185,11 +185,13 @@ typedef struct _Picture {
} PictureRec;
typedef Bool (*PictFilterValidateParamsProcPtr) (ScreenPtr pScreen, int id,
xFixed *params, int nparams);
xFixed *params, int nparams,
int *width, int *height);
typedef struct {
char *name;
int id;
PictFilterValidateParamsProcPtr ValidateParams;
int width, height;
} PictFilterRec, *PictFilterPtr;
#define PictFilterNearest 0
@ -458,7 +460,9 @@ PictureGetFilterName (int id);
int
PictureAddFilter (ScreenPtr pScreen,
char *filter,
PictFilterValidateParamsProcPtr ValidateParams);
PictFilterValidateParamsProcPtr ValidateParams,
int width,
int height);
Bool
PictureSetFilterAlias (ScreenPtr pScreen, char *filter, char *alias);