this->gfxdev->setPageMap(page2page, num_pages);
}
-static void getBitmapBBox(Guchar*alpha, int width, int height, int*xmin, int*ymin, int*xmax, int*ymax)
+typedef struct _ibbox {
+ int xmin,ymin,xmax,ymax;
+ struct _ibbox*next;
+} ibbox_t;
+
+static ibbox_t* ibbox_new(int x1, int y1, int x2, int y2)
+{
+ ibbox_t*b = (ibbox_t*)rfx_calloc(sizeof(ibbox_t));
+ b->xmin = x1;
+ b->ymin = y1;
+ b->xmax = x2;
+ b->ymax = y2;
+ return b;
+}
+
+static void ibbox_destroy(ibbox_t*b)
+{
+ while(b) {
+ ibbox_t*next = b->next;
+ free(b);
+ b = next;
+ }
+}
+
+static ibbox_t*getBitmapBBoxes(Guchar*alpha, int width, int height)
{
- *ymin = -1;
- *xmin = width;
- *xmax = 0;
+ int ymin = -1;
+ int ymax = -1;
+ int xmin = width;
+ int xmax = 0;
+
int x,y;
for(y=0;y<height;y++) {
Guchar*a = &alpha[y*width];
}
if(left!=width) {
- if(*ymin<0)
- *ymin=y;
- *ymax=y+1;
- if(left<*xmin) *xmin = left;
- if(right>*xmax) *xmax = right;
+ if(ymin<0)
+ ymin=y;
+ ymax=y+1;
+ if(left<xmin) xmin = left;
+ if(right>xmax) xmax = right;
}
}
- if(*xmin>=*xmax || *ymin>=*ymax) {
- *xmin = 0;
- *ymin = 0;
- *xmax = 0;
- *ymax = 0;
+ ibbox_t* bbox = 0;
+ if(xmin<xmax || ymin<ymax) {
+ bbox = ibbox_new(xmin, ymin, xmax, ymax);
}
+ return bbox;
}
void BitmapOutputDev::flushBitmap()
{
int width = rgbdev->getBitmapWidth();
int height = rgbdev->getBitmapHeight();
+
+ if(sizeof(SplashColor)!=3) {
+ msg("<error> sizeof(SplashColor)!=3");
+ return;
+ }
SplashColorPtr rgb = rgbbitmap->getDataPtr();
Guchar*alpha = rgbbitmap->getAlphaPtr();
Guchar*alpha2 = boolpolybitmap->getAlphaPtr();
- int xmin,ymin,xmax,ymax;
- getBitmapBBox(alpha, width, height, &xmin,&ymin,&xmax,&ymax);
+ ibbox_t* boxes = getBitmapBBoxes(alpha, width, height);
+ ibbox_t*b;
- /* clip against (-movex, -movey, -movex+width, -movey+height) */
- if(xmin < -this->movex) xmin = -this->movex;
- if(ymin < -this->movey) ymin = -this->movey;
- if(xmax > -this->movex + width) xmax = -this->movex+this->width;
- if(ymax > -this->movey + height) ymax = -this->movey+this->height;
+ for(b=boxes;boxes;boxes=boxes->next) {
+ int xmin = b->xmin;
+ int ymin = b->ymin;
+ int xmax = b->xmax;
+ int ymax = b->ymax;
- msg("<verbose> Flushing bitmap (bbox: %d,%d,%d,%d)", xmin,ymin,xmax,ymax);
-
- if((xmax-xmin)<=0 || (ymax-ymin)<=0) // no bitmap, nothing to do
- return;
+ /* clip against (-movex, -movey, -movex+width, -movey+height) */
+ if(xmin < -this->movex) xmin = -this->movex;
+ if(ymin < -this->movey) ymin = -this->movey;
+ if(xmax > -this->movex + width) xmax = -this->movex+this->width;
+ if(ymax > -this->movey + height) ymax = -this->movey+this->height;
- if(sizeof(SplashColor)!=3) {
- msg("<error> sizeof(SplashColor)!=3");
- return;
- }
- //xmin = ymin = 0;
- //xmax = width;
- //ymax = height;
-
- int rangex = xmax-xmin;
- int rangey = ymax-ymin;
- gfximage_t*img = (gfximage_t*)malloc(sizeof(gfximage_t));
- img->data = (gfxcolor_t*)malloc(rangex * rangey * 4);
- img->width = rangex;
- img->height = rangey;
- int x,y;
- for(y=0;y<rangey;y++) {
- SplashColorPtr in=&rgb[((y+ymin)*width+xmin)*sizeof(SplashColor)];
- gfxcolor_t*out = &img->data[y*rangex];
- Guchar*ain = &alpha[(y+ymin)*width+xmin];
- Guchar*ain2 = &alpha2[(y+ymin)*width+xmin];
- if(this->emptypage) {
- for(x=0;x<rangex;x++) {
- /* the first bitmap on the page doesn't need to have an alpha channel-
- blend against a white background*/
- out[x].r = (in[x*3+0]*ain[x])/255 + 255-ain[x];
- out[x].g = (in[x*3+1]*ain[x])/255 + 255-ain[x];
- out[x].b = (in[x*3+2]*ain[x])/255 + 255-ain[x];
- out[x].a = 255;
- }
- } else {
- for(x=0;x<rangex;x++) {
- /*
- if(!ain2[x]) {
- out[x].r = 0;out[x].g = 0;out[x].b = 0;out[x].a = 0;
- } else {*/
-
- /* according to endPage()/compositeBackground() in xpdf/SplashOutputDev.cc, we
- have to premultiply alpha (mix background and pixel according to the alpha channel).
- */
- out[x].r = (in[x*3+0]*ain[x])/255;
- out[x].g = (in[x*3+1]*ain[x])/255;
- out[x].b = (in[x*3+2]*ain[x])/255;
- out[x].a = ain[x];
+ msg("<verbose> Flushing bitmap (bbox: %d,%d,%d,%d)", xmin,ymin,xmax,ymax);
+
+ if((xmax-xmin)<=0 || (ymax-ymin)<=0) // no bitmap, nothing to do
+ continue;
+
+ int rangex = xmax-xmin;
+ int rangey = ymax-ymin;
+ gfximage_t*img = (gfximage_t*)malloc(sizeof(gfximage_t));
+ img->data = (gfxcolor_t*)malloc(rangex * rangey * 4);
+ img->width = rangex;
+ img->height = rangey;
+ int x,y;
+ for(y=0;y<rangey;y++) {
+ SplashColorPtr in=&rgb[((y+ymin)*width+xmin)*sizeof(SplashColor)];
+ gfxcolor_t*out = &img->data[y*rangex];
+ Guchar*ain = &alpha[(y+ymin)*width+xmin];
+ Guchar*ain2 = &alpha2[(y+ymin)*width+xmin];
+ if(this->emptypage) {
+ for(x=0;x<rangex;x++) {
+ /* the first bitmap on the page doesn't need to have an alpha channel-
+ blend against a white background*/
+ out[x].r = (in[x*3+0]*ain[x])/255 + 255-ain[x];
+ out[x].g = (in[x*3+1]*ain[x])/255 + 255-ain[x];
+ out[x].b = (in[x*3+2]*ain[x])/255 + 255-ain[x];
+ out[x].a = 255;
+ }
+ } else {
+ for(x=0;x<rangex;x++) {
+ /*
+ if(!ain2[x]) {
+ out[x].r = 0;out[x].g = 0;out[x].b = 0;out[x].a = 0;
+ } else */
+
+ /* according to endPage()/compositeBackground() in xpdf/SplashOutputDev.cc, we
+ have to premultiply alpha (mix background and pixel according to the alpha channel).
+ */
+ out[x].r = (in[x*3+0]*ain[x])/255;
+ out[x].g = (in[x*3+1]*ain[x])/255;
+ out[x].b = (in[x*3+2]*ain[x])/255;
+ out[x].a = ain[x];
+ }
}
}
+
+ /* transform bitmap rectangle to "device space" */
+ xmin += movex;
+ ymin += movey;
+ xmax += movex;
+ ymax += movey;
+
+ gfxmatrix_t m;
+ m.tx = xmin;
+ m.ty = ymin;
+ m.m00 = m.m11 = 1;
+ m.m10 = m.m01 = 0;
+ m.tx -= 0.5;
+ m.ty -= 0.5;
+
+ gfxline_t* line = gfxline_makerectangle(xmin, ymin, xmax, ymax);
+ dev->fillbitmap(dev, line, img, &m, 0);
+ gfxline_free(line);
+
+ free(img->data);img->data=0;free(img);img=0;
}
- /* transform bitmap rectangle to "device space" */
- xmin += movex;
- ymin += movey;
- xmax += movex;
- ymax += movey;
-
- gfxmatrix_t m;
- m.tx = xmin;
- m.ty = ymin;
- m.m00 = m.m11 = 1;
- m.m10 = m.m01 = 0;
- m.tx -= 0.5;
- m.ty -= 0.5;
-
- gfxline_t* line = gfxline_makerectangle(xmin, ymin, xmax, ymax);
- dev->fillbitmap(dev, line, img, &m, 0);
- gfxline_free(line);
+ ibbox_destroy(boxes);
memset(rgbbitmap->getAlphaPtr(), 0, rgbbitmap->getWidth()*rgbbitmap->getHeight());
memset(rgbbitmap->getDataPtr(), 0, rgbbitmap->getRowSize()*rgbbitmap->getHeight());
- free(img->data);img->data=0;free(img);img=0;
-
this->emptypage = 0;
}