reduced memory requirements for Illustrator files

[swftools.git] / lib / pdf / BitmapOutputDev.cc

diff --git a/lib/pdf/BitmapOutputDev.cc b/lib/pdf/BitmapOutputDev.cc
index 29cf789..a858765 100644 (file)
--- a/lib/pdf/BitmapOutputDev.cc
+++ b/lib/pdf/BitmapOutputDev.cc
@@ -81,7 +81,6 @@ BitmapOutputDev::BitmapOutputDev(InfoOutputDev*info, PDFDoc*doc)
     this->gfxdev->setDevice(this->gfxoutput);
     
     this->config_extrafontdata = 0;
-    this->config_skewedtobitmap = 0;
     this->config_optimizeplaincolorfills = 0;
     this->bboxpath = 0;
     //this->clipdev = 0;
@@ -175,8 +174,8 @@ static int dbg_btm_counter=1;
 
 void BitmapOutputDev::flushBitmap()
 {
-    int width = rgbdev->getBitmapWidth();
-    int height = rgbdev->getBitmapHeight();
+    int bitmap_width = rgbdev->getBitmapWidth();
+    int bitmap_height = rgbdev->getBitmapHeight();
 
     if(sizeof(SplashColor)!=3) {
        msg("<error> sizeof(SplashColor)!=3");
@@ -197,7 +196,7 @@ void BitmapOutputDev::flushBitmap()
     Guchar*alpha = rgbbitmap->getAlphaPtr();
     
     Guchar*alpha2 = stalepolybitmap->getDataPtr();
-    int width8 = (stalepolybitmap->getWidth()+7)/8;
+    int bitmap_width8 = (stalepolybitmap->getWidth()+7)/8;
 
     /*char filename[80];
     sprintf(filename, "flush%d_mask.png", dbg_btm_counter);
@@ -207,14 +206,17 @@ void BitmapOutputDev::flushBitmap()
     sprintf(filename, "flush%d_bitmap.png", dbg_btm_counter);
     writeBitmap(rgbbitmap, filename);*/
 
-    ibbox_t* boxes = get_bitmap_bboxes((unsigned char*)alpha, width, height);
-    ibbox_t*b;
+    ibbox_t pagebox = {-movex, -movey, -movex + this->width, -movey + this->height, 0};
+    ibbox_t bitmapbox = {0, 0, bitmap_width, bitmap_height, 0};
+    ibbox_t c = ibbox_clip(&bitmapbox, &pagebox);
+    ibbox_t* boxes = get_bitmap_bboxes((unsigned char*)(alpha+c.ymin*bitmap_width+c.xmin), c.xmax - c.xmin, c.ymax - c.ymin, bitmap_width);
 
+    ibbox_t*b;
     for(b=boxes;b;b=b->next) {
-       int xmin = b->xmin;
-       int ymin = b->ymin;
-       int xmax = b->xmax;
-       int ymax = b->ymax;
+       int xmin = b->xmin - this->movex;
+       int ymin = b->ymin - this->movey;
+       int xmax = b->xmax - this->movex;
+       int ymax = b->ymax - this->movey;
 
        /* clip against (-movex, -movey, -movex+width, -movey+height) */
 
@@ -249,10 +251,10 @@ void BitmapOutputDev::flushBitmap()
        img->height = rangey;
        int x,y;
        for(y=0;y<rangey;y++) {
-           SplashColorPtr in=&rgb[((y+ymin)*width+xmin)*sizeof(SplashColor)];
+           SplashColorPtr in=&rgb[((y+ymin)*bitmap_width+xmin)*sizeof(SplashColor)];
            gfxcolor_t*out = &img->data[y*rangex];
-           Guchar*ain = &alpha[(y+ymin)*width+xmin];
-           Guchar*ain2 = &alpha2[(y+ymin)*width8];
+           Guchar*ain = &alpha[(y+ymin)*bitmap_width+xmin];
+           Guchar*ain2 = &alpha2[(y+ymin)*bitmap_width8];
            if(this->emptypage) {
                for(x=0;x<rangex;x++) {
                    /* the first bitmap on the page doesn't need to have an alpha channel-
@@ -915,13 +917,7 @@ void BitmapOutputDev::finishPage()
     msg("<verbose> finishPage (BitmapOutputDev)");
     gfxdev->endPage();
    
-    if(layerstate == STATE_BITMAP_IS_ABOVE) {
-       this->flushText();
-       this->flushBitmap();
-    } else {
-       this->flushBitmap();
-       this->flushText();
-    }
+    flushEverything();
 
     /* splash will now destroy alpha, and paint the 
        background color into the "holes" in the bitmap */
@@ -1706,11 +1702,20 @@ gfxbbox_t BitmapOutputDev::getImageBBox(GfxState*state)
     bbox.ymax=max(bbox.ymax,y);
     return bbox;
 }
+
+GBool invalid_size(int width, int height)
+{
+    if((U64)width*(U64)height > 0x7fffffffll)
+       return 1;
+    return 0;
+}
+
 void BitmapOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
                           int width, int height, GBool invert,
                           GBool inlineImg)
 {
     msg("<debug> drawImageMask streamkind=%d", str->getKind());
+    if(invalid_size(width,height)) return;
 
     CopyStream*cpystr = new CopyStream(str, height * ((width + 7) / 8));
     str = cpystr->getStream();
@@ -1727,6 +1732,7 @@ void BitmapOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
                       int *maskColors, GBool inlineImg)
 {
     msg("<debug> drawImage streamkind=%d", str->getKind());
+    if(invalid_size(width,height)) return;
        
     CopyStream*cpystr = new CopyStream(str, height * ((width * colorMap->getNumPixelComps() * colorMap->getBits() + 7) / 8));
     str = cpystr->getStream();
@@ -1745,6 +1751,7 @@ void BitmapOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
                             GBool maskInvert)
 {
     msg("<debug> drawMaskedImage streamkind=%d", str->getKind());
+    if(invalid_size(width,height)) return;
     
     CopyStream*cpystr = new CopyStream(str, height * ((width * colorMap->getNumPixelComps() * colorMap->getBits() + 7) / 8));
     str = cpystr->getStream();
@@ -1764,6 +1771,7 @@ void BitmapOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *
                                 GfxImageColorMap *maskColorMap)
 {
     msg("<debug> drawSoftMaskedImage %dx%d (%dx%d) streamkind=%d", width, height, maskWidth, maskHeight, str->getKind());
+    if(invalid_size(width,height)) return;
 
     CopyStream*cpystr = new CopyStream(str, height * ((width * colorMap->getNumPixelComps() * colorMap->getBits() + 7) / 8));
     str = cpystr->getStream();
@@ -1786,8 +1794,19 @@ void BitmapOutputDev::drawForm(Ref id)
 void BitmapOutputDev::processLink(Link *link, Catalog *catalog)
 {
     msg("<debug> processLink");
+    flushEverything();
     gfxdev->processLink(link, catalog);
 }
+void BitmapOutputDev::flushEverything()
+{
+    if(layerstate == STATE_BITMAP_IS_ABOVE) {
+       this->flushText();
+       this->flushBitmap();
+    } else {
+       this->flushBitmap();
+       this->flushText();
+    }
+}
 
 void BitmapOutputDev::beginTransparencyGroup(GfxState *state, double *bbox,
                                    GfxColorSpace *blendingColorSpace,