fz_rect
fz_boundmasknode(fz_masknode *node, fz_matrix ctm)
{
fz_node *shape;
fz_node *color;
fz_rect one, two;
shape = node->super.first;
color = shape->next;
one = fz_boundnode(shape, ctm);
two = fz_boundnode(color, ctm);
return fz_intersectrects(one, two);
}
fz_rect
fz_boundtree(fz_tree *tree, fz_matrix ctm)
{
if (tree->root)
return fz_boundnode(tree->root, ctm);
return fz_emptyrect;
}
fz_rect
fz_boundtransformnode(fz_transformnode *node, fz_matrix ctm)
{
if (!node->super.first)
return fz_emptyrect;
return fz_boundnode(node->super.first, fz_concat(node->m, ctm));
}
static fz_error *
rendertext(fz_renderer *gc, fz_textnode *text, fz_matrix ctm)
{
fz_error *error;
fz_irect tbox;
fz_irect clip;
fz_matrix tm, trm;
fz_glyph glyph;
int i, x, y, cid;
tbox = fz_roundrect(fz_boundnode((fz_node*)text, ctm));
clip = fz_intersectirects(gc->clip, tbox);
DEBUG("text %s n=%d [%g %g %g %g];\n",
text->font->name, text->len,
text->trm.a, text->trm.b, text->trm.c, text->trm.d);
if (fz_isemptyrect(clip))
return fz_okay;
if (!(gc->flag & FOVER))
{
error = fz_newpixmapwithrect(&gc->dest, clip, 1);
if (error)
return error;
fz_clearpixmap(gc->dest);
}
tm = text->trm;
for (i = 0; i < text->len; i++)
{
cid = text->els[i].cid;
tm.e = text->els[i].x;
tm.f = text->els[i].y;
trm = fz_concat(tm, ctm);
x = fz_floor(trm.e);
y = fz_floor(trm.f);
trm.e = QUANT(trm.e - fz_floor(trm.e), HSUBPIX);
trm.f = QUANT(trm.f - fz_floor(trm.f), VSUBPIX);
error = fz_renderglyph(gc->cache, &glyph, text->font, cid, trm);
if (error)
return error;
if (!(gc->flag & FOVER))
drawglyph(gc, gc->dest, &glyph, x, y);
else
drawglyph(gc, gc->over, &glyph, x, y);
}
return fz_okay;
}
static int fitsinside(fz_node *node, fz_rect clip)
{
fz_rect bbox;
bbox = fz_boundnode(node, fz_identity());
if (fz_isinfiniterect(bbox)) return 0;
if (fz_isemptyrect(bbox)) return 1;
if (bbox.x0 < clip.x0) return 0;
if (bbox.x1 > clip.x1) return 0;
if (bbox.y0 < clip.y0) return 0;
if (bbox.y1 > clip.y1) return 0;
return 1;
}
/*
* Over
*/
fz_error
fz_newovernode(fz_node **nodep)
{
fz_node *node;
node = *nodep = fz_malloc(sizeof (fz_overnode));
if (!node)
return fz_rethrow(-1, "out of memory");
fz_initnode(node, FZ_NOVER);
return fz_okay;
}
#if 0 /* cf. http://code.google.com/p/sumatrapdf/issues/detail?id=533 */
fz_rect
fz_boundovernode(fz_overnode *node, fz_matrix ctm)
{
fz_node *child;
fz_rect bbox;
fz_rect temp;
child = node->super.first;
if (!child)
return fz_emptyrect;
bbox = fz_boundnode(child, ctm);
child = child->next;
while (child)
{
temp = fz_boundnode(child, ctm);
bbox = fz_mergerects(temp, bbox);
child = child->next;
}
return bbox;
}
static fz_error *
rendershade(fz_renderer *gc, fz_shadenode *node, fz_matrix ctm)
{
fz_error *error;
fz_irect bbox;
assert(!gc->maskonly);
DEBUG("shade;\n");
bbox = fz_roundrect(fz_boundnode((fz_node*)node, ctm));
bbox = fz_intersectirects(gc->clip, bbox);
error = fz_newpixmapwithrect(&gc->dest, bbox, gc->model->n + 1);
if (error)
return error;
return fz_rendershade(node->shade, ctm, gc->model, gc->dest);
}
fz_error*
processPage(
soPdfFile* inFile,
int pageNo,
fz_rect *bbRect,
int rectCount
)
{
fz_error *error;
fz_obj *pageRef;
pdf_page *pdfPage;
fz_rect contentBox;
fz_rect mediaBox;
// Initialize
for (int ctr = 0; ctr < rectCount; ctr++)
bbRect[ctr] = fz_emptyrect;
// Get the page reference and load the page contents
pageRef = pdf_getpageobject(inFile->pageTree, pageNo);
error = pdf_loadpage(&pdfPage, inFile->xref, pageRef);
if (error != NULL)
{
// Ideally pdf_loadpage should render all the pages
// and this should never happen
return processErrorPage(inFile, pageRef, pageNo, bbRect, error);
}
// Get the bounding box for the page
mediaBox = pdfPage->mediabox;
float mbHeight = mediaBox.y1 - mediaBox.y0;
// calculate the bounding box for all the elements in the page
contentBox = fz_boundnode(pdfPage->tree->root, fz_identity());
float cbHeight = contentBox.y1 - contentBox.y0;
// If there is nothing on the page we return nothing.
// should we return an empty page instead ???
if (fz_isemptyrect(contentBox))
goto Cleanup;
// if contentBox is bigger than mediaBox then there are some
// elements that should not be display and hence we reset the
// content box to media box
if ((cbHeight > mbHeight) || ((contentBox.x1 - contentBox.x0) > (mediaBox.x1 - mediaBox.x0)))
{
// Calculate the new content box based on the content that is
// inside the the media box and recalculate cbHeight
contentBox = getContainingRect(pdfPage->tree->root, mediaBox);
cbHeight = contentBox.y1 - contentBox.y0;
}
#ifdef _blahblah
printf("-->Page %d\n", pageNo);
bbdump(pdfPage->tree->root, 1);
#endif
// The rotation takes place when we insert the page into destination
// If only the mupdf renderer could give accurate values of the
// bounding box of all the elements in a page, the splitting would
// be so much more easier without overlapping, cutting text, etc
switch(p_mode)
{
case FitHeight:
case FitWidth:
bbRect[0] = contentBox;
goto Cleanup;
case Fit2xHeight:
case Fit2xWidth:
// Let the processing happen.
break;
case SmartFitHeight:
case SmartFitWidth:
default:
return fz_throw("Mode(%d) not yet implemented.", p_mode);
break;
}
// If the contentBox is 60% of mediaBox then do not split
if (((cbHeight / mbHeight) * 100) <= 55)
{
bbRect[0] = contentBox;
goto Cleanup;
}
// Get the first split contents from top. The box we specify is
// top 55% (bottom + 45) of the contents
bbRect[0] = contentBox;
bbRect[0].y0 = bbRect[0].y0 + (float)(0.45 * cbHeight);
bbRect[0] = getContainingRect(pdfPage->tree->root, bbRect[0]);
// Check if the contents we got in first split is more than 40%
// of the total contents
float bbRect0Height = bbRect[0].y1 - bbRect[0].y0;
if (((bbRect0Height / cbHeight) * 100) >= 40)
{
// The content is more than 40%. Put the rest of the
// content in the second split and exit
bbRect[1] = contentBox;
bbRect[1].y1 = bbRect[1].y1 - bbRect0Height;
// Adjust the split box height by X points to make sure
// we get everything and dont have annoying tail cuts
bbRect[0].y0 -= 2;
goto Cleanup;
}
// Since the contents we got in first split is less than 40%
// of the total contents, split the content in half with overlap
float overlap = (cbHeight * (float)(p_overlap / 100)) / 2;
bbRect[0] = contentBox;
bbRect[0].y0 = bbRect[0].y0 + (float)(0.5 * cbHeight) - overlap;
bbRect[1] = contentBox;
bbRect[1].y1 = bbRect[1].y1 - (float)(0.5 * cbHeight) + overlap;
Cleanup:
// This function can overflow the stack when the pdf page
// to be rendered is very complex. I had to increase the
// stack size reserved for exe using compiler option
pdf_droppage(pdfPage);
return error;
}
static fz_error *
rendermask(fz_renderer *gc, fz_masknode *mask, fz_matrix ctm)
{
fz_error *error;
int oldmaskonly;
fz_pixmap *oldover;
fz_irect oldclip;
fz_irect bbox;
fz_irect clip;
fz_pixmap *shapepix = nil;
fz_pixmap *colorpix = nil;
fz_node *shape;
fz_node *color;
float rgb[3];
shape = mask->super.first;
color = shape->next;
/* special case black voodo */
if (gc->flag & FOVER)
{
if (fz_issolidnode(color))
{
fz_solidnode *solid = (fz_solidnode*)color;
fz_convertcolor(solid->cs, solid->samples, gc->model, rgb);
gc->argb[0] = solid->a * 255;
gc->argb[1] = rgb[0] * solid->a * 255;
gc->argb[2] = rgb[1] * solid->a * 255;
gc->argb[3] = rgb[2] * solid->a * 255;
gc->argb[4] = rgb[0] * 255;
gc->argb[5] = rgb[1] * 255;
gc->argb[6] = rgb[2] * 255;
gc->flag |= FRGB;
/* we know these can handle the FRGB shortcut */
if (fz_ispathnode(shape))
return renderpath(gc, (fz_pathnode*)shape, ctm);
if (fz_istextnode(shape))
return rendertext(gc, (fz_textnode*)shape, ctm);
if (fz_isimagenode(shape))
return renderimage(gc, (fz_imagenode*)shape, ctm);
}
}
oldclip = gc->clip;
oldover = gc->over;
bbox = fz_roundrect(fz_boundnode(shape, ctm));
clip = fz_intersectirects(bbox, gc->clip);
bbox = fz_roundrect(fz_boundnode(color, ctm));
clip = fz_intersectirects(bbox, clip);
if (fz_isemptyrect(clip))
return fz_okay;
DEBUG("mask [%d %d %d %d]\n{\n", clip.x0, clip.y0, clip.x1, clip.y1);
{
fz_irect sbox = fz_roundrect(fz_boundnode(shape, ctm));
fz_irect cbox = fz_roundrect(fz_boundnode(color, ctm));
if (cbox.x0 >= sbox.x0 && cbox.x1 <= sbox.x1)
if (cbox.y0 >= sbox.y0 && cbox.y1 <= sbox.y1)
DEBUG("potentially useless mask\n");
}
gc->clip = clip;
gc->over = nil;
oldmaskonly = gc->maskonly;
gc->maskonly = 1;
error = rendernode(gc, shape, ctm);
if (error)
goto cleanup;
shapepix = gc->dest;
gc->dest = nil;
gc->maskonly = oldmaskonly;
error = rendernode(gc, color, ctm);
if (error)
goto cleanup;
colorpix = gc->dest;
gc->dest = nil;
gc->clip = oldclip;
gc->over = oldover;
if (shapepix && colorpix)
{
if (gc->over)
{
blendmask(gc, colorpix, shapepix, gc->over, 1);
}
else
{
clip.x0 = MAX(colorpix->x, shapepix->x);
clip.y0 = MAX(colorpix->y, shapepix->y);
clip.x1 = MIN(colorpix->x+colorpix->w, shapepix->x+shapepix->w);
clip.y1 = MIN(colorpix->y+colorpix->h, shapepix->y+shapepix->h);
error = fz_newpixmapwithrect(&gc->dest, clip, colorpix->n);
if (error)
goto cleanup;
blendmask(gc, colorpix, shapepix, gc->dest, 0);
}
}
DEBUG("}\n");
if (shapepix) fz_droppixmap(shapepix);
if (colorpix) fz_droppixmap(colorpix);
return fz_okay;
cleanup:
if (shapepix) fz_droppixmap(shapepix);
if (colorpix) fz_droppixmap(colorpix);
return error;
}
static fz_error *
renderimage(fz_renderer *gc, fz_imagenode *node, fz_matrix ctm)
{
fz_error *error;
fz_image *image = node->image;
fz_irect bbox;
fz_irect clip;
int dx, dy;
fz_pixmap *tile;
fz_pixmap *temp;
fz_matrix imgmat;
fz_matrix invmat;
int fa, fb, fc, fd;
int u0, v0;
int x0, y0;
int w, h;
int tileheight;
DEBUG("image %dx%d %d+%d %s\n{\n", image->w, image->h, image->n, image->a, image->cs?image->cs->name:"(nil)");
bbox = fz_roundrect(fz_boundnode((fz_node*)node, ctm));
clip = fz_intersectirects(gc->clip, bbox);
if (fz_isemptyrect(clip))
return fz_okay;
if (image->w == 0 || image->h == 0)
return fz_okay;
if (image->n + image->a == 0)
return fz_okay;
calcimagescale(ctm, image->w, image->h, &dx, &dy);
/* try to fit tile into a typical L2 cachce */
tileheight = 512 * 1024 / (image->w * (image->n + image->a));
/* tileheight must be an even multiple of dy, except for last band */
tileheight = (tileheight + dy - 1) / dy * dy;
if ((dx != 1 || dy != 1) && image->h > tileheight) {
int y = 0;
DEBUG(" load image tile size = %dx%d\n", image->w, tileheight);
error = fz_newpixmap(&tile, 0, 0, image->w,
tileheight, image->n + 1);
if (error)
return error;
error = fz_newscaledpixmap(&temp, image->w, image->h, image->n + 1, dx, dy);
if (error)
goto cleanup;
do {
if (y + tileheight > image->h)
tileheight = image->h - y;
tile->y = y;
tile->h = tileheight;
DEBUG(" tile xywh=%d %d %d %d sxsy=1/%d 1/%d\n",
0, y, image->w, tileheight, dx, dy);
error = image->loadtile(image, tile);
if (error)
goto cleanup1;
error = fz_scalepixmaptile(temp, 0, y, tile, dx, dy);
if (error)
goto cleanup1;
y += tileheight;
} while (y < image->h);
fz_droppixmap(tile);
tile = temp;
}
else {
DEBUG(" load image\n");
error = fz_newpixmap(&tile, 0, 0, image->w, image->h, image->n + 1);
if (error)
return error;
error = image->loadtile(image, tile);
if (error)
goto cleanup;
if (dx != 1 || dy != 1)
{
DEBUG(" scale image 1/%d 1/%d\n", dx, dy);
error = fz_scalepixmap(&temp, tile, dx, dy);
if (error)
goto cleanup;
fz_droppixmap(tile);
tile = temp;
}
}
if (image->cs && image->cs != gc->model)
{
DEBUG(" convert from %s to %s\n", image->cs->name, gc->model->name);
error = fz_newpixmap(&temp, tile->x, tile->y, tile->w, tile->h, gc->model->n + 1);
if (error)
goto cleanup;
fz_convertpixmap(image->cs, tile, gc->model, temp);
fz_droppixmap(tile);
tile = temp;
}
imgmat.a = 1.0 / tile->w;
imgmat.b = 0.0;
imgmat.c = 0.0;
imgmat.d = -1.0 / tile->h;
imgmat.e = 0.0;
imgmat.f = 1.0;
invmat = fz_invertmatrix(fz_concat(imgmat, ctm));
w = clip.x1 - clip.x0;
h = clip.y1 - clip.y0;
x0 = clip.x0;
y0 = clip.y0;
u0 = (invmat.a * (x0+0.5) + invmat.c * (y0+0.5) + invmat.e) * 65536;
v0 = (invmat.b * (x0+0.5) + invmat.d * (y0+0.5) + invmat.f) * 65536;
fa = invmat.a * 65536;
fb = invmat.b * 65536;
fc = invmat.c * 65536;
fd = invmat.d * 65536;
#define PSRC tile->samples, tile->w, tile->h
#define PDST(p) p->samples + ((y0-p->y) * p->w + (x0-p->x)) * p->n, p->w * p->n
#define PCTM u0, v0, fa, fb, fc, fd, w, h
switch (gc->flag)
{
case FNONE:
{
DEBUG(" fnone %d x %d\n", w, h);
if (image->cs)
error = fz_newpixmapwithrect(&gc->dest, clip, gc->model->n + 1);
else
error = fz_newpixmapwithrect(&gc->dest, clip, 1);
if (error)
goto cleanup;
if (image->cs)
fz_img_4c4(PSRC, PDST(gc->dest), PCTM);
else
fz_img_1c1(PSRC, PDST(gc->dest), PCTM);
}
break;
case FOVER:
{
DEBUG(" fover %d x %d\n", w, h);
if (image->cs)
fz_img_4o4(PSRC, PDST(gc->over), PCTM);
else
fz_img_1o1(PSRC, PDST(gc->over), PCTM);
}
break;
case FOVER | FRGB:
DEBUG(" fover+rgb %d x %d\n", w, h);
fz_img_w4i1o4(gc->argb, PSRC, PDST(gc->over), PCTM);
break;
default:
assert(!"impossible flag in image span function");
}
DEBUG("}\n");
fz_droppixmap(tile);
return fz_okay;
cleanup1:
fz_droppixmap(temp);
cleanup:
fz_droppixmap(tile);
return error;
}
fz_rect
fz_boundovernode(fz_overnode *node, fz_matrix ctm)
{
struct {
int cap, ix;
struct {
fz_node *node;
fz_rect bbox;
} *items;
} stack;
fz_node *child = node->super.first;
fz_rect bbox = fz_emptyrect;
fz_rect temp;
if (!child)
return fz_emptyrect;
stack.cap = 8;
stack.ix = 0;
stack.items = nil;
do
{
if (child->kind != FZ_NOVER)
{
temp = fz_boundnode(child, ctm);
bbox = fz_mergerects(temp, bbox);
child = child->next;
}
else if (child->first)
{
if (!stack.items)
stack.items = fz_malloc(stack.cap * sizeof(*stack.items));
else if (stack.ix >= stack.cap)
{
stack.cap *= 2;
stack.items = fz_realloc(stack.items, stack.cap * sizeof(*stack.items));
if (!stack.items)
return fz_emptyrect;
}
stack.items[stack.ix].node = child;
stack.items[stack.ix].bbox = bbox;
stack.ix++;
bbox = fz_emptyrect;
child = child->first;
}
else
{
child = child->next;
}
while (!child && stack.ix > 0)
{
stack.ix--;
temp = stack.items[stack.ix].bbox;
bbox = fz_mergerects(temp, bbox);
child = stack.items[stack.ix].node->next;
}
} while (child);
fz_free(stack.items);
return bbox;
}
static fz_error *
addpatternshape(pdf_gstate *gs, fz_node *shape,
pdf_pattern *pat, fz_colorspace *cs, float *v)
{
fz_error *error;
fz_node *xform;
fz_node *over;
fz_node *mask;
fz_node *link;
fz_matrix ctm;
fz_matrix inv;
fz_matrix ptm;
fz_rect bbox;
int x, y, x0, y0, x1, y1;
/* patterns are painted in user space */
ctm = getmatrix(gs->head);
inv = fz_invertmatrix(ctm);
error = fz_newmasknode(&mask);
if (error)
return fz_rethrow(error, "cannot create mask node");
ptm = fz_concat(pat->matrix, fz_invertmatrix(ctm));
error = fz_newtransformnode(&xform, ptm);
if (error)
{
fz_dropnode(mask);
return fz_rethrow(error, "cannot create transform node");
}
error = pdf_newovernode(&over, gs);
if (error)
{
fz_dropnode(xform);
fz_dropnode(mask);
return fz_rethrow(error, "cannot create over node");
}
fz_insertnodelast(mask, shape);
fz_insertnodelast(mask, xform);
fz_insertnodelast(xform, over);
xform = nil;
/* over, xform, mask are now owned by the tree */
/* get bbox of shape in pattern space for stamping */
ptm = fz_concat(ctm, fz_invertmatrix(pat->matrix));
bbox = fz_boundnode(shape, ptm);
/* expand bbox by pattern bbox */
bbox.x0 += pat->bbox.x0;
bbox.y0 += pat->bbox.y0;
bbox.x1 += pat->bbox.x1;
bbox.y1 += pat->bbox.y1;
x0 = fz_floor(bbox.x0 / pat->xstep);
y0 = fz_floor(bbox.y0 / pat->ystep);
x1 = fz_ceil(bbox.x1 / pat->xstep);
y1 = fz_ceil(bbox.y1 / pat->ystep);
for (y = y0; y <= y1; y++)
{
for (x = x0; x <= x1; x++)
{
ptm = fz_translate(x * pat->xstep, y * pat->ystep);
error = fz_newtransformnode(&xform, ptm);
if (error)
return fz_rethrow(error, "cannot create transform node for stamp");
error = fz_newlinknode(&link, pat->tree);
if (error)
{
fz_dropnode(xform);
return fz_rethrow(error, "cannot create link node for stamp");
}
fz_insertnodelast(xform, link);
fz_insertnodelast(over, xform);
}
}
if (pat->ismask)
{
error = addcolorshape(gs, mask, 1.0, cs, v);
if (error)
return fz_rethrow(error, "cannot add colored shape");
return fz_okay;
}
fz_insertnodelast(gs->head, mask);
return fz_okay;
}
static fz_error *
renderimage(fz_renderer *gc, fz_imagenode *node, fz_matrix ctm)
{
fz_error *error;
fz_image *image = node->image;
fz_irect bbox;
fz_irect clip;
int dx, dy;
fz_pixmap *tile;
fz_pixmap *temp;
fz_matrix imgmat;
fz_matrix invmat;
int fa, fb, fc, fd;
int u0, v0;
int x0, y0;
int w, h;
DEBUG("image %dx%d %d+%d %s\n{\n", image->w, image->h, image->n, image->a, image->cs?image->cs->name:"(nil)");
bbox = fz_roundrect(fz_boundnode((fz_node*)node, ctm));
clip = fz_intersectirects(gc->clip, bbox);
if (fz_isemptyrect(clip))
return nil;
calcimagescale(ctm, image->w, image->h, &dx, &dy);
DEBUG(" load image\n");
error = fz_newpixmap(&tile, 0, 0, image->w, image->h, image->n + 1);
if (error)
return error;
error = image->loadtile(image, tile);
if (error)
goto cleanup;
if (dx != 1 || dy != 1)
{
DEBUG(" scale image 1/%d 1/%d\n", dx, dy);
error = fz_scalepixmap(&temp, tile, dx, dy);
if (error)
goto cleanup;
fz_droppixmap(tile);
tile = temp;
}
if (image->cs && image->cs != gc->model)
{
DEBUG(" convert from %s to %s\n", image->cs->name, gc->model->name);
error = fz_newpixmap(&temp, tile->x, tile->y, tile->w, tile->h, gc->model->n + 1);
if (error)
goto cleanup;
fz_convertpixmap(image->cs, tile, gc->model, temp);
fz_droppixmap(tile);
tile = temp;
}
imgmat.a = 1.0 / tile->w;
imgmat.b = 0.0;
imgmat.c = 0.0;
imgmat.d = -1.0 / tile->h;
imgmat.e = 0.0;
imgmat.f = 1.0;
invmat = fz_invertmatrix(fz_concat(imgmat, ctm));
w = clip.x1 - clip.x0;
h = clip.y1 - clip.y0;
x0 = clip.x0;
y0 = clip.y0;
u0 = (invmat.a * (x0+0.5) + invmat.c * (y0+0.5) + invmat.e) * 65536;
v0 = (invmat.b * (x0+0.5) + invmat.d * (y0+0.5) + invmat.f) * 65536;
fa = invmat.a * 65536;
fb = invmat.b * 65536;
fc = invmat.c * 65536;
fd = invmat.d * 65536;
#define PSRC tile->samples, tile->w, tile->h
#define PDST(p) p->samples + ((y0-p->y) * p->w + (x0-p->x)) * p->n, p->w * p->n
#define PCTM u0, v0, fa, fb, fc, fd, w, h
switch (gc->flag)
{
case FNONE:
{
DEBUG(" fnone %d x %d\n", w, h);
if (image->cs)
error = fz_newpixmapwithrect(&gc->dest, clip, gc->model->n + 1);
else
error = fz_newpixmapwithrect(&gc->dest, clip, 1);
if (error)
goto cleanup;
if (image->cs)
fz_img_4c4(PSRC, PDST(gc->dest), PCTM);
else
fz_img_1c1(PSRC, PDST(gc->dest), PCTM);
}
break;
case FOVER:
{
DEBUG(" fover %d x %d\n", w, h);
if (image->cs)
fz_img_4o4(PSRC, PDST(gc->over), PCTM);
else
fz_img_1o1(PSRC, PDST(gc->over), PCTM);
}
break;
case FOVER | FRGB:
DEBUG(" fover+rgb %d x %d\n", w, h);
fz_img_w3i1o4(gc->rgb, PSRC, PDST(gc->over), PCTM);
break;
default:
assert(!"impossible flag in image span function");
}
DEBUG("}\n");
fz_droppixmap(tile);
return nil;
cleanup:
fz_droppixmap(tile);
return error;
}